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Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Modeling studies of mountain-scale radionuclide transport in the unsaturated zone at Yucca Mountain, Nevada  

E-Print Network [OSTI]

Investigations at Yucca Mountain - The Potential Repositoryin the Unsaturated Zone, Yucca Mountain, Nevada, ResourcesIN THE UNSATURATED ZONE AT YUCCA MOUNTAIN, NEVADA George J.

Moridis, George J.; Seol, Yongkoo; Wu, Yu-Shu

2003-01-01T23:59:59.000Z

2

A site scale model for modeling unsaturated zone processes at Yucca Mountain, Nevada  

E-Print Network [OSTI]

Unsaturated Zone Model of Yucca Mountain, Nevada, for theZone Trocesses at yucca Mountain, N G. S. Bodvarsson, Y. S.unsaturated zone at Yucca Mountain, Nevada, as a permanent

1997-01-01T23:59:59.000Z

3

Calibration of Yucca Mountain unsaturated zone flow and transport model using porewater chloride data  

E-Print Network [OSTI]

of hydrogeologic units at Yucca Mountain, Nevada. U.S.infiltration for the Yucca Mountain Area, Nevada. Milestonethe unsaturated zone at Yucca Mountain, Nevada. J. Contam.

Liu, Jianchun; Sonnenthal, Eric L.; Bodvarsson, Gudmundur S.

2002-01-01T23:59:59.000Z

4

Modeling thermal-hydrological response of the unsaturated zone at Yucca Mountain, Nevada, to thermal load at a potential repository  

E-Print Network [OSTI]

Repository at Yucca Mountain. In Materials Research Societystudies using the Yucca Mountain unsaturated zone model.Unsaturated Zone, Yucca Mountain, Nevada. Water Resources

Haukwa, C.B.; Wu, Yu-Shu; Bodvarsson, G.S.

2002-01-01T23:59:59.000Z

5

The Influence of Proposed Repository Thermal Load on Multiphase Flow and Heat Transfer in the Unsaturated Zone of Yucca Mountain  

E-Print Network [OSTI]

Studies Using the Yucca Mountain Unsaturated Zone Model,Unsaturated Zone at Yucca Mountain, Nevada, to Thermal LoadLarge Block Test at Yucca Mountain, Nevada, Water Resources

Wu, Y.-S.; Mukhopadhyay, Sumit; Zhang, Keni; Bodvarsson, G.S.

2006-01-01T23:59:59.000Z

6

Sensitivity Analysis Of Hydrological Parameters In Modeling Flow And Transport In The Unsaturated Zone Of Yucca Mountain  

E-Print Network [OSTI]

Unsaturated Zone of Yucca Mountain Keni Zhang, Yu-Shu Wu,volcanic deposits at Yucca Mountain have been intensivelyhydraulic properties, Yucca Mountain Introduction Site

Zhang, Keni; Wu, Yu-Shu; Houseworth, James E

2006-01-01T23:59:59.000Z

7

A Radionuclide Transport Model for the Unsaturated Zone at Yucca Mountain Bruce A. Robinson  

E-Print Network [OSTI]

A Radionuclide Transport Model for the Unsaturated Zone at Yucca Mountain Bruce A. Robinson Zhiming model calculations for radionuclide transport in the unsaturated zone at Yucca Mountain. The model developed by the Yucca Mountain Project based on calibrations to site data. The particle-tracking technique

Lu, Zhiming

8

A Site-Scale Model For Fluid And Heat Flow In The Unsaturated Zone Of Yucca  

Open Energy Info (EERE)

Site-Scale Model For Fluid And Heat Flow In The Unsaturated Zone Of Yucca Site-Scale Model For Fluid And Heat Flow In The Unsaturated Zone Of Yucca Mountain, Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Site-Scale Model For Fluid And Heat Flow In The Unsaturated Zone Of Yucca Mountain, Nevada Details Activities (0) Areas (0) Regions (0) Abstract: A three-dimensional unsaturated-zone numerical model has been developed to simulate flow and distribution of moisture, gas and heat at Yucca Mountain, Nevada, a potential repository site for high-level radioactive waste. The model takes into account the simultaneous flow dynamics of liquid water, vapor, air and heat in the highly heterogeneous, fractured porous rock in the unsaturated zone (UZ). This model is intended for use in the prediction of the current and future conditions in the UZ so

9

Temporal Damping Effect of the Yucca Mountain Fractured Unsaturated Rock on Transient Infiltration Pulses  

E-Print Network [OSTI]

unsaturated zone at Yucca Mountain. J. of Cont. Hydrol. ,2003b. Calibration of Yucca Mountain unsaturated zone flowthe unsaturated zone, Yucca Mountain, USGS Water Resources

Zhang, Keni; Wu, Yu-Shu; Pan, Lehua

2005-01-01T23:59:59.000Z

10

Evolution of the unsaturated zone testing at Yucca Mountain  

E-Print Network [OSTI]

INTO DRIFTS AT YUCCA MOUNTAIN." JOURNAL OF CONTAMINANTFRACTURES AT YUCCA MOUNTAIN." JOURNAL OF CONTAMINANTPneumatic Testing at Yucca Mountain." International Journal

Wang, J.S.Y.; Bodvarsson, G.S.

2002-01-01T23:59:59.000Z

11

{sup 36}Cl measurements of the unsaturated zone flux at Yucca Mountain  

SciTech Connect (OSTI)

Determining the unsaturated zone percolation rate, or flux, is an extremely important site characterization issue for the proposed Yucca Mountain nuclear waste repository. A new technique that measures the {sup 36}Cl content of tuff from the Exploratory Shaft will be used to calculate flux through the unsaturated zone over longer times than could be measured by the more conventional {sup 14}C method. Measurements of the {sup 36}Cl "bomb pulse" in soil samples from Yucca Mountain have been used to confirm that infiltration is not an important recharge mechanism. 5 refs., 3 figs.

Norris, A.E.; Wolfsberg, K.; Gifford, S.K.

1985-12-31T23:59:59.000Z

12

Massively parallel computing simulation of fluid flow in the unsaturated zone of Yucca Mountain, Nevada  

E-Print Network [OSTI]

Central Block Area, Yucca Mountain, Nye County, Nevada. Mapunsaturated zone, Yucca Mountain, Nevada. Water-Resourcesisotope distributions at Yucca Mountain. Sandia National

Zhang, Keni; Wu, Yu-Shu; Bodvarsson, G.S.

2001-01-01T23:59:59.000Z

13

Unsaturated Zone I. Overview  

E-Print Network [OSTI]

Chapter 2 Unsaturated Zone I. Overview If the Yucca Mountain site is deemed suitable for re of the extent of welding, the tuffs within the UZ at Yucca Mountain are grouped informally into hydrogeologic Yucca Mountain is illustrated in Figure 2-1 on page 14. A. Why UZ Was Chosen Initial studies of Yucca

14

A mountain-scale model for characterizing unsaturated flow and transport in fractured tuffs of Yucca Mountain  

E-Print Network [OSTI]

to Fault Zones at Yucca Mountain, Nevada, International2003c. Calibration of Yucca Mountain Unsaturated Zone FlowUnsaturated Zone, Yucca Mountain, Nevada, Water-Resources

Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Bodvarsson, G.S.

2003-01-01T23:59:59.000Z

15

Analysis of gaseous-phase stable and radioactive isotopes in the unsaturated zone, Yucca Mountain, Nevada  

SciTech Connect (OSTI)

The Nevada Nuclear Waste Storage Investigations Project of the US Department of Energy provides that agency with data for evaluating volcanic tuff beneath Yucca Mountain, Nevada, to determine its suitability for a potential repository of high-level radioactive waste. Thickness of the unsaturated zone, which consists of fractured, welded and nonwelded tuff, is about 1640 to 2460 feet (500 to 750 meters). One question to be resolved is an estimate of minimum ground-water traveltime from the disturbed zone of the potentail repository to the accessible environment. Another issue is the potential for diffusive or convective gaseous transport of radionuclides from an underground facility in the unsaturated zone to the accessible environment. Gas samples were collected at intervals to a depth of 1200 feet from the unsaturated zone at Yucca Mountain, Nevada. Samples were analyzed for major atmospheric gases; carbon dioxide in the samples was analyzed for carbon-14 activity and for {delta}2!{sup 3}C; water vapor in the samples was analyzed for deuterium and oxygen-18. These data could provide insight into the nature of unsaturated zone transport processes. 15 refs., 4 figs., 4 tabs.

Yang, I.C.; Haas, H.H.; Weeks, E.P.; Thorstenson, D.C.

1985-12-31T23:59:59.000Z

16

Conceptual evaluation of the potential role of fractures in unsaturated processes at Yucca Mountain  

E-Print Network [OSTI]

of Process Models, Yucca Mountain, Nevada. U.S. GeologicalUnsaturated Zone Model of Yucca Mountain, Nevada. J. Contam.Studies Facility, Yucca Mountain Project. Yucca Mountain,

Hinds, Jennifer J.; Bodvarsson, Gudmundur S.; Nieder-Westermann, Gerald H.

2002-01-01T23:59:59.000Z

17

Characterization of Spatial Variability of Hydrogeologic Properties for Unsaturated Flow in the Fractured Rocks at Yucca Mountain, Nevada  

E-Print Network [OSTI]

using matrix properties , Yucca Mountain, Nevada, USGS Waterof hydrogeologic units at Yucca Mountain, Nevada, U.S.Unsaturated Zone, Yucca Mountain, Nevada . Water-Resources

Zhou, Quanlin; Bodvarsson, Gudmundur S.; Liu, Hui-Hai; Oldenburg, Curtis M.

2002-01-01T23:59:59.000Z

18

Unsaturated zone waters from the Nopal I natural analog, Chihuahua, Mexico -- Implications for radionuclide mobility at Yucca Mountain  

SciTech Connect (OSTI)

Chemical and U-Th isotopic data on unsaturated zone waters from the Nopal I natural analog reveal effects of water-rock interaction and help constrain models of radionuclide release and transport at the site and, by analogy, at the proposed nuclear waste repository at Yucca Mountain. Geochemical reaction-path modeling indicates that, under oxidizing conditions, dissolution of uraninite (spent fuel analog) by these waters will lead to eventual schoepite precipitation regardless of initial silica concentration provided that groundwater is not continuously replenished. Thus, less soluble uranyl silicates may not dominate the initial alteration assemblage and keep dissolved U concentrations low. Uranium-series activity ratios are consistent with models of U transport at the site and display varying degrees of leaching versus recoil mobilization. Thorium concentrations may reflect the importance of colloidal transport of low-solubility radionuclides in the unsaturated zone.

Pickett, D.A.; Murphy, W.M.

1999-07-01T23:59:59.000Z

19

Modeling Unsaturated Flow and Transport Processes in Fractured Tuffs of Yucca Mountain  

E-Print Network [OSTI]

zone site-scale model, Yucca Mountain Site Characterizationsite-scale model, Yucca Mountain Project Milestone 3GLM105M,unsaturated zone, Yucca Mountain, Nevada. Water-Resources

Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Bodvarsson, G.S.

2003-01-01T23:59:59.000Z

20

THE INFLUENCE OF REPOSITORY THERMAL LOAD ON MULTIPHASE FLOW AND HEAT TRANSFER IN THE UNSATURATED ZONE OF YUCCA MOUNTAIN  

SciTech Connect (OSTI)

This paper investigates the impact of proposed repository thermal-loading on mountain-scale flow and heat transfer in the unsaturated fractured rock of Yucca Mountain, Nevada. In this context, a model has been developed to study the coupled thermal-hydrological (TH) processes at the scale of the entire Yucca Mountain. This mountain-scale TH model implements the current geological framework and hydrogeological conceptual models, and incorporates the latest rock thermal and hydrological properties. The TH model consists of a two-dimensional north-south vertical cross section across the entire unsaturated zone model domain and uses refined meshes near and around the proposed repository block, based on the current repository design, drift layout, thermal loading scenario, and estimated current and future climatic conditions. The model simulations provide insights into thermally affected liquid saturation, gas- and liquid-phase fluxes, and elevated water and rock temperature, which in turn allow modelers to predict the changes in water flux driven by evaporation/condensation processes, and drainage between drifts.

Yu-Shu Wu, Sumit Mukhopadhyay, Keni Zhang, and G. S. Bodvarsson

2006-04-16T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Repository site data report for unsaturated tuff, Yucca Mountain, Nevada  

SciTech Connect (OSTI)

The US Department of Energy is currently considering the thick sequences of unsaturated, fractured tuff at Yucca Mountain, on the southwestern boundary of the Nevada Test Site, as a possible candidate host rock for a nuclear-waste repository. Yucca Mountain is in one of the most arid areas in the United States. The site is within the south-central part of the Great Basin section of the Basin and Range physiographic province and is located near a number of silicic calderas of Tertiary age. Although localized zones of seismic activity are common throughout the province, and faults are present at Yucca Mountain, the site itself is basically aseismic. No data are available on the composition of ground water in the unsaturated zone at Yucca Mountain. It has been suggested that the composition is bounded by the compositions of water from wells USW-H3, UE25p-1, J-13, and snow or rain. There are relatively few data available from Yucca Mountain on the moisture content and saturation, hydraulic conductivity, and characteristic curves of the unsaturated zone. The available literature on thermomechanical properties of tuff does not always distinguish between data from the saturated zone and data from the unsaturated zone. Geochemical, hydrologic, and thermomechanical data available on the unsaturated tuffs of Yucca Mountain are tabulated in this report. Where the data are very sparse, they have been supplemented by data from the saturated zone or from areas other than Yucca Mountain. 316 refs., 58 figs., 37 tabs.

Tien, P.L.; Updegraff, C.D.; Siegel, M.D.; Wahi, K.K.; Guzowski, R.V.

1985-11-01T23:59:59.000Z

22

A Mountain-Scale Thermal Hydrologic Model for Simulating Fluid Flow and Heat Transfer in Unsaturated Fractured Rock  

E-Print Network [OSTI]

Studies Using the Yucca Mountain Unsaturated Zone Model,Unsaturated Zone at Yucca Mountain, Nevada, to Thermal LoadUnsaturated Zone, Yucca Mountain, Nevada, Water-Resources

Wu, Yu-Shu; Mukhopadhyay, Sumit; Zhang, Keni; Bodvarsson, Gudmundur S.

2005-01-01T23:59:59.000Z

23

Preliminary 3-D site-scale studies of radioactive colloid transort in the unsaturated zone at Yucca Mountain, Nevada  

E-Print Network [OSTI]

into drifts at Yucca Mountain. ” J. Contam. Hydrol. , 38(1–investigations at Yucca Mountain - the potential repositorygroup exposed at Yucca Mountain, Nevada. USGS Open-File

Moridis, G.J.; Hu, Q.; Wu, Y.-S.; Bodvarsson, G.S.

2001-01-01T23:59:59.000Z

24

Busted Butte Unsaturated Zone Transport Test: Fiscal Year 1998 Status Report Yucca Mountain Site Characterization Program Deliverable SPU85M4  

SciTech Connect (OSTI)

This report describes the status of the Busted Butte Unsaturated Zone Transport Test (UZTT) and documents the progress of construction activities and site and laboratory characterization activities undertaken in fiscal year 1998. Also presented are predictive flow-and-transport simulations for Test Phases 1 and 2 of testing and the preliminary results and status of these test phases. Future anticipated results obtained from unsaturated-zone (UZ) transport testing in the Calico Hills Formation at Busted Butte are also discussed in view of their importance to performance assessment (PA) needs to build confidence in and reduce the uncertainty of site-scale flow-and-transport models and their abstractions for performance for license application. The principal objectives of the test are to address uncertainties associated with flow and transport in the UZ site-process models for Yucca Mountain, as identified by the PA working group in February 1997. These include but are not restricted to: (1) The effect of heterogeneities on flow and transport in unsaturated and partially saturated conditions in the Calico Hills Formation. In particular, the test aims to address issues relevant to fracture-matrix interactions and permeability contrast boundaries; (2) The migration behavior of colloids in fractured and unfractured Calico Hills rocks; (3) The validation through field testing of laboratory sorption experiments in unsaturated Calico Hills rocks; (4) The evaluation of the 3-D site-scale flow-and-transport process model (i.e., equivalent-continuum/dual-permeability/discrete-fracture-fault representations of flow and transport) used in the PA abstractions for license application; and (5) The effect of scaling from lab scale to field scale and site scale.

Bussod, G.Y.; Turin, H.J.; Lowry, W.E.

1999-11-01T23:59:59.000Z

25

Reactive transport model for the ambient unsaturated hydrogeochemical system at Yucca mountain, Nevada  

Science Journals Connector (OSTI)

To assist a technical review of a potential application for a geologic repository, a reactive transport model is presented for the ambient hydrogeochemical system at Yucca Mountain (YM). The model simulates two-phase, nonisothermal, advective and diffusive ... Keywords: Yucca mountain, geochemistry, groundwater chemistry, groundwater flow and transport, hydrology, reactive transport model, unsaturated zone

Lauren Browning; William M. Murphy; Chandrika Manepally; Randall Fedors

2003-04-01T23:59:59.000Z

26

Unsaturated Zone and Saturated Zone Transport Properties (U0100)  

SciTech Connect (OSTI)

This Analysis/Model Report (AMR) summarizes transport properties for the lower unsaturated zone hydrogeologic units and the saturated zone at Yucca Mountain and provides a summary of data from the Busted Butte Unsaturated Zone Transport Test (UZTT). The purpose of this report is to summarize the sorption and transport knowledge relevant to flow and transport in the units below Yucca Mountain and to provide backup documentation for the sorption parameters decided upon for each rock type. Because of the complexity of processes such as sorption, and because of the lack of direct data for many conditions that may be relevant for Yucca Mountain, data from systems outside of Yucca Mountain are also included. The data reported in this AMR will be used in Total System Performance Assessment (TSPA) calculations and as general scientific support for various Process Model Reports (PMRs) requiring knowledge of the transport properties of different materials. This report provides, but is not limited to, sorption coefficients and other relevant thermodynamic and transport properties for the radioisotopes of concern, especially neptunium (Np), plutonium (Pu), Uranium (U), technetium (Tc), iodine (I), and selenium (Se). The unsaturated-zone (UZ) transport properties in the vitric Calico Hills (CHv) are discussed, as are colloidal transport data based on the Busted Butte UZTT, the saturated tuff, and alluvium. These values were determined through expert elicitation, direct measurements, and data analysis. The transport parameters include information on interactions of the fractures and matrix. In addition, core matrix permeability data from the Busted Butte UZTT are summarized by both percent alteration and dispersion.

J. Conca

2000-12-20T23:59:59.000Z

27

Preliminary 3-D site-scale studies of radioactive colloid transport in the unsaturated zone at  

E-Print Network [OSTI]

at Yucca Mountain, Nevada G.J. Moridis *, Q. Hu, Y.-S. Wu, G.S. Bodvarsson Earth Sciences Division in a repository to be situated in the unsaturated zone (UZ) at Yucca Mountain (YM), Nevada. In this study we of the spatial distribution of hydraulic and transport properties in the Yucca Mountain subsurface are considered

Hu, Qinhong "Max"

28

Unsaturated Zone Hydrology Jasper Vrugt  

E-Print Network [OSTI]

CEE 271 Unsaturated Zone Hydrology Instructor Jasper Vrugt Engineering Tower #834E / #536 (LAB) Tel.: 505-231-2698 jasper @uci.edu Office Hours: By Appointment Lecture, 1 hour; discussion, 20 minutes: ICS

Vrugt, Jasper A.

29

Analyzing flow patterns in unsaturated fractured rock of Yucca Mountain using an integrated modeling approach  

E-Print Network [OSTI]

zone site-scale model, Yucca Mountain Site Characterizationzone site- scale model, Yucca Mountain Project Milestonelateral diversion at Yucca Mountain, Nevada, Water Resources

Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Pan, Lehua; Bodvarsson, Gudmundur S.

2008-01-01T23:59:59.000Z

30

Several TOUGH2 Modules Developed for Site Characterization Studies of Yucca Mountain  

E-Print Network [OSTI]

Unsaturated Zone Model of Yucca Mountain, Nevada. Lawrencestudies of Yucca Mountain. The model formulations arebeing used in the Yucca Mountain project. Pruess, K . ,

Wu, Yu-Shu; Pruess, Karsten

1998-01-01T23:59:59.000Z

31

Effect of small-scale fractures on flow and transport processes at Yucca Mountain, Nevada  

E-Print Network [OSTI]

Transport Processes at Yucca Mountain, Nevada Yu-Shu Wu, H.matrix interaction in Yucca Mountain site characterizationthe Unsaturated Zone of Yucca Mountain, Nevada, Journal of

Wu, Yu-Shu; Liu, H.H.; Bodvarsson, G.S.

2002-01-01T23:59:59.000Z

32

Fluid flow and reactive transport around potential nuclear waste emplacement tunnels at Yucca Mountain, Nevada  

E-Print Network [OSTI]

Unsaturated Zone at Yucca Mountain, Nevada. U.S. Geologicalzone model at Yucca Mountain, Nevada. J. Contaminantinvesti- gations at Yucca Mountain - the potential

Spycher, N.F.; Sonnenthal, E.L.; Apps, J.A.

2002-01-01T23:59:59.000Z

33

Estimating large-scale fracture permeability of unsaturated rock using barometric pressure data  

E-Print Network [OSTI]

Studies Facility, Yucca Mountain, Nevada, U.S. GeologicalUnsaturated Zone, Yucca Mountain, Nevada, Water-Resourcesstudies facility, Yucca Mountain, Nevada, U.S. Geological

Wu, Yu-Shu; Zhang, Keni; Liu, Hui-Hai

2005-01-01T23:59:59.000Z

34

The use of TOUGH2/iTOUGH2 in support of the Yucca Mountain Project: Successes and limitations  

E-Print Network [OSTI]

emplace- ment drifts at Yucca Mountain, Proceedings: TOUGHLarge Block Test at Yucca Mountain, Nevada, Water Resourcesthe Unsaturated Zone, Yucca Mountain, Ne- vada. LBL-20553.

Bodvarsson, G.S.; Birkholzer, J.T.; Finsterle, S.; Liu, H.H.; Rutqvist, J.; Wu, Y.S.

2003-01-01T23:59:59.000Z

35

Reply to "Commentary: Assessment of past infiltration fluxes through Yucca Mountain on the basis of the secondary mineral record-is it a viable methodology?", by Y.V. Dublyansky and S.Z. Smirnov  

E-Print Network [OSTI]

infiltration fluxes through Yucca Mountain on the basis ofdata for the unsaturated zone at Yucca Mountain (Nevada).AMR U0085, Yucca Mountain Nuclear Waste Disposal Project,

Sonnenthal, Eric; Xu, Tianfu; Bodvarrson, Gudmundur

2005-01-01T23:59:59.000Z

36

Seepage into drifts in unsaturated fractured rock at Yucca Mountain  

E-Print Network [OSTI]

Fractured Rock at Yucca Mountain Jens Birkholzer, Guomin Lrepository site at Yucca Mountain, Nevada, as it is locatedclimate conditions at Yucca Mountain. The numerical study is

Birkholzer, Jens; Li, Guomin; Tsang, Chin-Fu; Tsang, Yvonne

1998-01-01T23:59:59.000Z

37

Numerical simulation of gas flow through unsaturated fractured rock at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Numerical analysis is used to identify the physical phenomena associated with barometrically driven gas (air and water vapor) flow through unsaturated fractured rock at Yucca Mountain, Nevada. Results from simple finite difference simulations indicate that for a fractured rock scenario, the maximum velocity of air out of an uncased 10 cm borehole is 0.002 m s{sub {minus}1}. An equivalent porous medium (EPM) model was incorporated into a multiphase, multicomponent simulator to test more complex conceptual models. Results indicate that for a typical June day, a diurnal pressure wave propagates about 160 m into the surrounding Tiva Canyon hydrogeologic unit. Dry air that enters the formation evaporates water around the borehole which reduces capillary pressure. Multiphase countercurrent flow develops in the vicinity of the hole; the gas phase flows into the formation while the liquid phase flows toward the borehole. The effect occurs within 0.5 m of the borehole. The amount of water vapor leaving the formation during 1 day is 900 cm{sup 3}. This is less than 0.1% of the total recharge into the formation, suggesting that the barometric effect may be insignificant in drying the unsaturated zone. However, gas phase velocities out of the borehole (3 m s{sup {minus}1}), indicating that observed flow rates from wells along the east flank of Yucca Mountain were able to be simulated with a barometric model.

Cooper, C.A. [Nevada Univ., Las Vegas, NV (United States). Water Resources Center

1990-01-01T23:59:59.000Z

38

Simulation of heat transfer in the unsaturated zone  

SciTech Connect (OSTI)

Heat transfer can play an important role in fluid flow near the emplacement site of high-level nuclear waste. The effects on far- field flow can be important in understanding net moisture fluxes above the repository zone. The convection in the unsaturated zone at the Yucca Mountain site was responsible for this movement. If this is so, then the convection could provide a mechanism for drying the rock above the repository zone and thus provide a buffer for heavy rainfall events. In addition, the convection would increase the movement of gaseous radionuclides such as {sup 14}CO{sub 2}, tritiated water vapor, and {sup 129}I (Weeks, 1987). Because of the complexity of the problem, numerical models were required to calculate gas flow and vapor transport at the site. Kipp previously modeled this problem using the code HST3D. This code represents the flow of a single-phase fluid with both heat- and mass-transfer effects included. Water density and partial pressure effects are accounted for by the virtual temperature method. In this paper, the problem was simulated using the code FEHMN, a finite-element heat- and mass-transfer code being developed for the Yucca Mountain Project. The work described in this paper was done in preparation of the upcoming problem to be formulated for the Performance Assessment Calculation Exercise. 5 refs., 9 figs., 1 tab.

Zyvoloski, G.

1990-02-01T23:59:59.000Z

39

Unsaturated flow modeling in performance assessments for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste  

Science Journals Connector (OSTI)

Abstract This paper summarizes the progression of modeling efforts of infiltration, percolation, and seepage conducted between 1984 and 2008 to evaluate feasibility, viability, and assess compliance of a repository in the unsaturated zone for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. Scientific understanding of infiltration in a desert environment, unsaturated percolation flux in fractures and matrix of the volcanic tuff, and seepage into an open drift in a thermally perturbed environment was initially lacking in 1984. As understanding of the Yucca Mountain disposal system increased through site characterization and in situ testing, modeling of infiltration, percolation, and seepage evolved from simple assumptions in a single model in 1984 to three modeling modules each based on several detailed process models in 2008. Uncertainty in percolation flux through Yucca Mountain was usually important in explaining the observed uncertainty in performance measures:cumulative release in assessments prior to 1995 and individual dose, thereafter.

Rob P. Rechard; Jens T. Birkholzer; Yu-Shu Wu; Joshua S. Stein; James E. Houseworth

2014-01-01T23:59:59.000Z

40

A Conceptual and Numerical Model for Thermal-Hydrological-Chemical Processes in the Yucca Mountain Drift Scale Test  

E-Print Network [OSTI]

of the unsaturated zone at Yucca Mountain, NV from three-Scale Heater Test. Yucca Mountain Project Level 4 MilestoneReport, Chapter 6. Yucca Mountain Project Level 4 Milestone

Sonnenthal, Eric L.; Spycher, Nicolas F.; Conrad, Mark; Apps, John

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Yucca Mountain Area Saturated Zone Dissolved Organic Carbon Isotopic Data  

SciTech Connect (OSTI)

Groundwater samples in the Yucca Mountain area were collected for chemical and isotopic analyses and measurements of water temperature, pH, specific conductivity, and alkalinity were obtained at the well or spring at the time of sampling. For this project, groundwater samples were analyzed for major-ion chemistry, deuterium, oxygen-18, and carbon isotopes of dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC). The U.S. Geological Survey (USGS) performed all the fieldwork on this project including measurement of water chemistry field parameters and sample collection. The major ions dissolved in the groundwater, deuterium, oxygen-18, and carbon isotopes of dissolved inorganic carbon (DIC) were analyzed by the USGS. All preparation and processing of samples for DOC carbon isotopic analyses and geochemical modeling were performed by the Desert Research Institute (DRI). Analysis of the DOC carbon dioxide gas produced at DRI to obtain carbon-13 and carbon-14 values was conducted at the University of Arizona Accelerator Facility (a NSHE Yucca Mountain project QA qualified contract facility). The major-ion chemistry, deuterium, oxygen-18, and carbon isotopes of DIC were used in geochemical modeling (NETPATH) to determine groundwater sources, flow paths, mixing, and ages. The carbon isotopes of DOC were used to calculate groundwater ages that are independent of DIC model corrected carbon-14 ages. The DIC model corrected carbon-14 calculated ages were used to evaluate groundwater travel times for mixtures of water including water beneath Yucca Mountain. When possible, groundwater travel times were calculated for groundwater flow from beneath Yucca Mountain to down gradient sample sites. DOC carbon-14 groundwater ages were also calculated for groundwaters in the Yucca Mountain area. When possible, groundwater travel times were estimated for groundwater flow from beneath Yucca Mountain to down gradient groundwater sample sites using the DOC calculated groundwater ages. The DIC calculated groundwater ages were compared with DOC calculated groundwater ages and both of these ages were compared to travel times developed in ground-water flow and transport models. If nuclear waste is stored in Yucca Mountain, the saturated zone is the final barrier against the release of radionuclides to the environment. The most recent rendition of the TSPA takes little credit for the presence of the saturated zone and is a testament to the inadequate understanding of this important barrier. If radionuclides reach the saturated zone beneath Yucca Mountain, then there is a travel time before they would leave the Yucca Mountain area and flow down gradient to the Amargosa Valley area. Knowing how long it takes groundwater in the saturated zone to flow from beneath Yucca Mountain to down gradient areas is critical information for potential radionuclide transport. Radionuclide transport in groundwater may be the quickest pathway for radionuclides in the proposed Yucca Mountain repository to reach land surface by way of groundwater pumped in Amargosa Valley. An alternative approach to ground-water flow and transport models to determine the travel time of radionuclides from beneath Yucca Mountain to down gradient areas in the saturated zone is by carbon-14 dating of both inorganic and organic carbon dissolved in the groundwater. A standard method of determining ground-water ages is to measure the carbon-13 and carbon-14 of DIC in the groundwater and then correct the measured carbon-14 along a flow path for geochemical reactions that involve carbon containing phases. These geochemical reactions are constrained by carbon-13 and isotopic fractionations. Without correcting for geochemical reactions, the ground-water ages calculated from only the differences in carbon-14 measured along a flow path (assuming the decrease in carbon-14 is due strictly to radioactive decay) could be tens of thousands of years too old. The computer program NETPATH, developed by the USGS, is the best geochemical program for correcting carbon-14 activities for geochemical r

Thomas, James; Decker, David; Patterson, Gary; Peterman, Zell; Mihevc, Todd; Larsen, Jessica; Hershey, Ronald

2007-06-25T23:59:59.000Z

42

Development of discrete flow paths in unsaturated fractures at Yucca Mountain  

E-Print Network [OSTI]

into drifts at Yucca Mountain. Journal of Contaminantof infiltration for the Yucca Mountain Area, Nevada, U. S.matrix properties, Yucca Mountain, Nevada, U.S. Geological

Bodvarsson, G.S.; Wu, Yu-Shu; Zhang, Keni

2002-01-01T23:59:59.000Z

43

Vertical Variability in Saturated Zone Hydrochemistry Near Yucca Mountain, Nevada  

SciTech Connect (OSTI)

The differences in the saturated zone hydrochemistry with depth at borehole NC-EWDP-22PC reflect the addition of recharge along Fortymile Wash. The differences in water chemistry with depth at borehole NC-EWDP-19PB appear to indicate that other processes are involved. Water from the lower part of NC-EWDP-19PB possesses chemical characteristics that clearly indicate that it has undergone cation exchange that resulted in the removal of calcium and magnesium and the addition of sodium. This water is very similar to water from the Western Yucca Mountain facies that has previously been thought to flow west of NC-EWDP-19PB. Water from the lower zone in NC-EWDP-19PB also could represent water from the Eastern Yucca Mountain facies that has moved through clay-bearing or zeolitized aquifer material resulting in the altered chemistry. Water chemistry from the upper part of the saturated zone at NC-EWDP-19PB, both zones at NC-EWDP-22PC, and wells in the Fortymile Wash facies appears to be the result of recharge through the alluvium south of Yucca Mountain and within the Fortymile Wash channel.

G. Patterson; P. Striffler

2007-02-17T23:59:59.000Z

44

Introduction to the Special Section in Vadose Zone Journal: Parameter Identification and Uncertainty Assessment in the Unsaturated Zone  

E-Print Network [OSTI]

and Uncertainty Assessment in the Unsaturated Zone Jasper A. Vrugt* and Shlomo P. Neuman DURING the last few

Vrugt, Jasper A.

45

Analysis of models for induced gas flow in the unsaturated zone Kehua You,1  

E-Print Network [OSTI]

Analysis of models for induced gas flow in the unsaturated zone Kehua You,1 Hongbin Zhan,1 term are frequently employed in modeling the induced gas flow in an unsaturated zone underlying a leaky 2011. [1] Accurate description of induced gas flow in an unsaturated zone is indispensable

Zhan, Hongbin

46

The role of fracture coatings on water imbibition into unsaturated tuff from Yucca Mountain  

SciTech Connect (OSTI)

Studies dealing with fracture flow at Yucca Mountain have generally assumed that any water flowing down in a fracture will be absorbed by the porous matrix. However, a thin lining of low permeability material on the fracture walls may significantly impede imbibition into the matrix of unsaturated tuff. In this research, imbibition was measured across the fracture surfaces in the laboratory. Samples were collected from surface outcrops of Tiva Canyon and Topopah Spring members of the Paintbrush tuff near Yucca Mountain. Sorptivity, a convenient measure of imbibition, was used to investigate the changes in hydraulic properties as a result of fracture coatings. Results from experimental analysis of Topopah Spring tuff showed decreased sorptivity across coated fracture surfaces. Statistically, the coatings on the Tiva Canyon samples do not significantly affect sorptivity. Scanning Electron Microscope analysis shows that coatings on the s grit Tiva Canyon samples are made up of iron, aluminum and to some extent magnesium. Coating material on the Topopah Spring samples is made up of calcium, magnesium, aluminum and iron. Coating significantly reduces the sorptivity for the Topopah Spring tuff. Numerical results are presented to show the effect of fracture coatings on water infiltration down a vertical fracture in simulated tuff. For the Topopah Spring tuff, the wetting front in the coated fracture travels deeper in the fracture and less into the matrix compared to the wetting front in the uncoated fracture. For the Tiva Canyon tuff, the wetting front in the uncoated fracture travels deeper in the fracture and less into the matrix as compared to the wetting front in the coated fracture.

Chekuri, V.S.; Tyler, S.W.; Fordham, J.W.

1995-11-01T23:59:59.000Z

47

www.VadoseZoneJournal.org Simula on of Radionuclide  

E-Print Network [OSTI]

: Applica on to Yucca Mountain, Nevada This paper describes the numerical methods developed to simulate at the Yucca Mountain. Regardless of the disposi on of the Yucca Mountain License Applica on, this method has to the water table through the unsaturated zone for the Yucca Mountain system. Abbrevia ons: ADE, advec on

Lu, Zhiming

48

Transport of Carbon-14 in a Large Unsaturated Soil Column  

Science Journals Connector (OSTI)

...gas around waste disposal trenches at the...this manuscript. Funding for this project...INEEL subsurface disposal area. INEEL...transport of 14C at Yucca Mountain, Nevada, USA...unsaturated zone waste disposal GeoRef, Copyright...

Mitchell A. Plummer; Larry C. Hull; Don T. Fox

49

Modeling coupled thermal-hydrological-chemical processes in the unsaturated fractured rock of Yucca Mountain, Nevada: Heterogeneity and seepage  

E-Print Network [OSTI]

emplacement drift at Yucca Mountain. Journal of ContaminantScale Heater Test at Yucca Mountain. International Journalemplacement tunnels at Yucca Mountain, Nevada. Journal of

Mukhopadhyay, Sumit; Sonnenthal, Eric L.; Spycher, Nicolas

2005-01-01T23:59:59.000Z

50

RADIONUCLIDE MIGRATION IN TUFF UNDER UNSATURATED CONDITIONS  

SciTech Connect (OSTI)

An understanding of the transport of radionuclides through unsaturated and saturated tuffaceous material is essential in assessing the safety of the proposed high-level waste repository at Yucca Mountain. Migration experiments with conservative and chemically reactive non-radioactive tracers have been performed at the Busted Butte Unsaturated Zone underground facility, SE of Yucca Mountain, and with radionuclides in columns of crushed tuff at the Los Alamos National Laboratory. In this paper, complementary radionuclide migration experiments, performed under unsaturated conditions in a small block of tuff excavated from Busted Butte, are described.

T.T. Vandergraaf

2000-10-25T23:59:59.000Z

51

A strategy to seal exploratory boreholes in unsaturated tuff; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

This report presents a strategy for sealing exploratory boreholes associated with the Yucca Mountain Site Characterization Project. Over 500 existing and proposed boreholes have been considered in the development of this strategy, ranging from shallow (penetrating into alluvium only) to deep (penetrating into the groundwater table). Among the comprehensive list of recommendations are the following: Those boreholes within the potential repository boundary and penetrating through the potential repository horizon are the most significant boreholes from a performance standpoint and should be sealed. Shallow boreholes are comparatively insignificant and require only nominal sealing. The primary areas in which to place seals are away from high-temperature zones at a distance from the potential repository horizon in the Paintbrush nonwelded tuff and the upper portion of the Topopah Spring Member and in the tuffaceous beds of the Calico Hills Unit. Seals should be placed prior to waste emplacement. Performance goals for borehole seals both above and below the potential repository are proposed. Detailed construction information on the boreholes that could be used for future design specifications is provided along with a description of the environmental setting, i.e., the geology, hydrology, and the in situ and thermal stress states. A borehole classification scheme based on the condition of the borehole wall in different tuffaceous units is also proposed. In addition, calculations are presented to assess the significance of the boreholes acting as preferential pathways for the release of radionuclides. Design calculations are presented to answer the concerns of when, where, and how to seal. As part of the strategy development, available technologies to seal exploratory boreholes (including casing removal, borehole wall reconditioning, and seal emplacement) are reviewed.

Fernandez, J.A. [Sandia National Labs., Albuquerque, NM (United States); Case, J.B.; Givens, C.A.; Carney, B.C. [IT Corp., Albuquerque, NM (United States)

1994-04-01T23:59:59.000Z

52

Saturated Zone Plumes in Volcanic Rock: Implications for Yucca Mountain  

SciTech Connect (OSTI)

This paper presents a literature survey of the occurrences of radionuclide plumes in saturated, fractured rocks. Three sites, Idaho National laboratory, Hanford, and Oak Ridge are discussed in detail. Results of a modeling study are also presented showing that the length to width ratio of a plume starting within the repository footprint at the Yucca Mountain Project site, decreases from about 20:1 for the base case to about 4:1 for a higher value of transverse dispersivity, indicating enhanced lateral spreading of the plume. Due to the definition of regulatory requirements, this lateral spreading does not directly impact breakthrough curves at the 18 km compliance boundary, however it increases the potential that a plume will encounter reducing conditions, thus significantly retarding the transport of sorbing radionuclides.

S. Kelkar; R. Roback; B. Robinson; G. Srinivasan; C. Jones; P. Reimus

2006-02-14T23:59:59.000Z

53

Initial field testing definition of subsurface sealing and backfilling tests in unsaturated tuff; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

This report contains an initial definition of the field tests proposed for the Yucca Mountain Project repository sealing program. The tests are intended to resolve various performance and emplacement concerns. Examples of concerns to be addressed include achieving selected hydrologic and structural requirements for seals, removing portions of the shaft liner, excavating keyways, emplacing cementitious and earthen seals, reducing the impact of fines on the hydraulic conductivity of fractures, efficient grouting of fracture zones, sealing of exploratory boreholes, and controlling the flow of water by using engineered designs. Ten discrete tests are proposed to address these and other concerns. These tests are divided into two groups: Seal component tests and performance confirmation tests. The seal component tests are thorough small-scale in situ tests, the intermediate-scale borehole seal tests, the fracture grouting tests, the surface backfill tests, and the grouted rock mass tests. The seal system tests are the seepage control tests, the backfill tests, the bulkhead test in the Calico Hills unit, the large-scale shaft seal and shaft fill tests, and the remote borehole sealing tests. The tests are proposed to be performed in six discrete areas, including welded and non-welded environments, primarily located outside the potential repository area. The final selection of sealing tests will depend on the nature of the geologic and hydrologic conditions encountered during the development of the Exploratory Studies Facility and detailed numerical analyses. Tests are likely to be performed both before and after License Application.

Fernandez, J.A. [Sandia National Labs., Albuquerque, NM (United States); Case, J.B.; Tyburski, J.R. [I. T. Corp., Albuquerque, NM (United States)

1993-05-01T23:59:59.000Z

54

Regional groundwater modeling of the saturated zone in the vicinity of Yucca Mountain, Nevada; Iterative Performance Assessment, Phase 2  

SciTech Connect (OSTI)

Results of groundwater modeling of the saturated zone in the vicinity of Yucca Mountain are presented. Both a regional (200 {times} 200 km) and subregional (50 {times} 50 km) model were used in the analyses. Simulations were conducted to determine the impact of various disruptive that might take place over the life span of a proposed Yucca Mountain geologic conditions repository on the groundwater flow field, as well as changes in the water-table elevations. These conditions included increases in precipitation and groundwater recharge within the regional model, changes in permeability of existing hydrogeologic barriers, a:nd the vertical intrusion of volcanic dikes at various orientations through the saturated zone. Based on the regional analysis, the rise in the water-table under Yucca Mountain due to various postulated conditions ranged from only a few meters to 275 meters. Results of the subregional model analysis, which was used to simulate intrusive dikes approximately 4 kilometers in length in the vicinity of Yucca Mountain, showed water-table rises ranging from a few meters to as much as 103 meters. Dikes oriented approximately north-south beneath Yucca Mountain produced the highest water-table rises. The conclusions drawn from this analysis are likely to change as more site-specific data become available and as the assumptions in the model are improved.

Ahola, M.; Sagar, B. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

1992-10-01T23:59:59.000Z

55

Studies on unsaturated zone hydrology and radionuclide migration at a shallow-land burial site  

SciTech Connect (OSTI)

We studied unsaturated zone hydrology and the migration of radionuclides at a shallow-land burial site located at Maxey Flats, Kentucky. The initial results indicate that the principal pathway of water entry into the trench was by percolation through the trench caps. Tritium-bearing water was found to be moving upward from a saturated waste-burial trench through the trench cap to the soil surface. Evidence of tritium movement at a depth of 3 to 4 meters was observed to a distance of about 5 meters laterally. No /sup 137/Cs migration was observed, but very small amounts of /sup 238/Pu and /sup 60/Co were found to have migrated short distances from the trench.

Schulz, R.K. (Univ. of California, Berkeley); Fowler, E.B.; Essington, E.H.; Polzer, W.L.

1981-07-01T23:59:59.000Z

56

Yucca Mountain project prototype testing  

SciTech Connect (OSTI)

The U.S. DOE is responsible for characterizing the Yucca Mountain site in Nevada to determine its suitability for development as a geologic repository to isolate high-level nuclear waste for at least 10,000 years. This unprecedented task relies in part on measurements made with relatively new methods or applications, such as dry coring and overcoring for studies to be conducted from the land surface and in an underground facility. The Yucca Mountain Project has, since 1988, implemented a program of equipment development and methods development for a broad spectrum of hydrologic, geologic, rock mechanics, and thermomechanical tests planned for use in an Exploratory Shaft during site characterization at the Yucca Mountain site. A second major program was fielded beginning in April 1989 to develop and test methods and equipment for surface drilling to obtain core samples from depth using only air as a circulating medium. The third major area of prototype testing has been during the ongoing development of the Instrumentation/ Data Acquisition System (IDAS), designed to collect and monitor data from down-hole instrumentation in the unsaturated zone, and store and transmit the data to a central archiving computer. Future prototype work is planned for several programs including the application of vertical seismic profiling methods and flume design to characterizing the geology at Yucca Mountain. The major objectives of this prototype testing are to assure that planned Site Characterization testing can be carried out effectively at Yucca Mountain, both in the Exploratory Shaft Facility (ESF), and from the surface, and to avoid potential major failures or delays that could result from the need to re-design testing concepts or equipment. This paper will describe the scope of the Yucca Mountain Project prototype testing programs and summarize results to date. 3 figs.

Hughes, W.T.; Girdley, W.A.

1990-08-01T23:59:59.000Z

57

Characterization and Prediction of Subsurface Pneumatic Pressure Variations at Yucca Mountain, Nevada  

E-Print Network [OSTI]

Group Exposed at Yucca Mountain, Nevada, U. S. Geologicalunsaturated zone, Yucca Mountain, Nevada, Water Resourcesgeologic map of Yucca Mountain, Nye County, Nevada, with

Ahlers, C. Fredrik; Finsterle, Stefan; Bodvarsson, Gudmundur S.

1998-01-01T23:59:59.000Z

58

Synopsis of recent moisture flux analyses relevant to the unsaturated zone at Area G  

SciTech Connect (OSTI)

This report summarizes selected recent analyses relevant to the assessment of the site performance for disposal facilities at Los Alamos (Area G) regarding unsaturated zone transport of moisture in liquid and vapor phases and the surface water balance. Much of the analyses methods have been reported previously but in several separate and detailed reports. These do not always reflect the overview possible with hindsight. The present report is an attempt to integrate the author`s previous results into a cohesive whole. Due to project time constraints, this report is incomplete in some area. This report first reviews the basis for the Darcy flux analyses and its inherent uncertainties, as detailed in previous reports. Results from the previous works are then reviewed and discussed and in some cases, elaborated in an attempt for clarification. New results of the Darcy Flux Analyses are presented and discussed for Area G mesa top locations, nearby canyon locations and a second mesa top location (TA46 west of Area G). Select evapotranspiration and precipitation data from TA6 are presented and discussed. The conclusions section draws a picture of the hydrology which unifies the study results reported here and in previous reports for the undisturbed and disturbed site locations.

Vold, E.

1998-03-01T23:59:59.000Z

59

Advective Desorption of Uranium (VI) from Contaminated Hanford Vadose Zone Sediments under Saturated and Unsaturated Conditions  

SciTech Connect (OSTI)

Sedimentary, hydrologic, and geochemical variations in the Hanford subsurface environment, as well as compositional differences in contaminating waste streams, have created vast differences in the migration and mobility of uranium within the subsurface environment. A series of hydraulically-saturated and -unsaturated column experiments were performed to i.) assess the effect of water content on the advective desorption and migration of uranium from contaminated sediments, and ii.) evaluate the uranium concentration that can develop in porewater and/or groundwater as a result of desorption/dissolution reactions. Flow rate and moisture content were varied to evaluate the influence of contact time, pore water velocity, and macropore desaturation on aqueous uranium concentrations. Sediments were collected from the T-TX-TY tank farm complex and the 300 Area Process Ponds located on the Hanford Site, southeastern Washington State. The sediments vary in depth, mineralogy, and in contamination events. Experiments were conducted under mildly alkaline/calcareous conditions representative of conditions commonly encountered at repository sites across the arid western United States and, in particular, the Hanford site. Results illustrate the release of uranium from these sediments is kinetically controlled and low water contents encountered within the Hanford vadose zone result in the formation of mobile-immobile water regimes, which isolate a fraction of the reactive sites within the sediments, effectively reducing the concentration of uranium released into migrating porewaters.

Wellman, Dawn M.; Zachara, John M.; Liu, Chongxuan; Qafoku, Nikolla; Smith, Steven C.; Forrester, Steven W.

2008-11-03T23:59:59.000Z

60

An Integrated Modeling Analysis of Unsaturated Flow Patterns in Fractured Rock  

E-Print Network [OSTI]

zone transport model of Yucca Mountain, Las Alamos Nationalisotope distributions at Yucca Mountain, Las Alamos Nationalpneumatic response of at Yucca Mountain, Nevada, Journal of

Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Pan, Lehua; Bodvarsson, Gudmundur S.

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

MODELING FLOW AND TRANSPORT PATHWAYS TO THE POTENTIAL REPOSITORY HORIZON AT YUCCA MOUNTAIN  

SciTech Connect (OSTI)

The isotopic ratios of {sup 36}Cl/Cl are used in conjunction with geologic interpretation and numerical modeling to evaluate flow and transport pathways, processes, and model parameters in the unsaturated zone at Yucca Mountain. By synthesizing geochemical and geologic data, the numerical model results provide insight into the validity of alternative hydrologic parameter sets, flow and transport processes in and away from fault zones, and the applicability of {sup 36}Cl/Cl. ratios for evaluating alternative conceptual models.

A.V. WOLFSBERG, G.J.C. ROEMER, J.T. FABRYKA-MARTIN, B.A. ROBINSON

1998-03-04T23:59:59.000Z

62

Pore-water extraction from unsaturated tuff by triaxial and one-dimensional compression methods, Nevada Test Site, Nevada  

SciTech Connect (OSTI)

The hydrologic system in the unsaturated tuff at Yucca Mountain, Nevada, is being evaluated for the US Department of Energy by the Yucca Mountain Project Branch of the US Geological Survey as a potential site for a high-level radioactive-waste repository. Part of this investigation includes a hydrochemical study that is being made to assess characteristics of the hydrologic system such as: traveltime, direction of flow, recharge and source relations, and types and magnitudes of chemical reactions in the unsaturated tuff. In addition, this hydrochemical information will be used in the study of the dispersive and corrosive effects of unsaturated-zone water on the radioactive-waste storage canisters. This report describes the design and validation of laboratory experimental procedures for extracting representative samples of uncontaminated pore water from welded and nonwelded, unsaturated tuffs from the Nevada Test Site.

Mower, T.E. [PRC Environmental Management, Inc., Denver, CO (United States); Higgins, J.D. [Colorado School of Mines, Golden, CO (United States); Yang, In C.; Peters, C.A. [Geological Survey, Denver, CO (United States)

1994-07-01T23:59:59.000Z

63

ReproducedfromVadoseZoneJournal.PublishedbySoilScienceSocietyofAmerica.Allcopyrightsreserved. Characterizing Unsaturated Diffusion in Porous Tuff Gravel  

E-Print Network [OSTI]

-level effort in gravel deposits at the Hanford Reservation nuclear waste repository at Yucca Mountain, Nevada water and interior water. The surface water radioactive waste repository at Yucca Mountain, Ne-ray computed tomography (CT) in shield and the tuff host rock at Yucca Mountain is anpartially saturated gravel

Hu, Qinhong "Max"

64

Unsaturated zone characterization of the Area 5 Radioactive Waste Management Site  

SciTech Connect (OSTI)

Six undisturbed soil samples of near-surface sediments were collected from the Nevada Test Site (NTS) Radioactive Waste Management Site (RWMS) for physical and hydrologic characterization in the laboratory. Of these samples, three were obtained from the wall of Pit No. 3 and three from the floor. Physical properties measured on all samples were dry bulk density ({rho}{sub b}) and solid particle density ({rho}{sub s}). Average dry bulk densities for the wall and floor samples were 1.47 g/cm{sup 3} and 1.45 g/cm{sup 3}, while solid particle densities were 2.34 g/cc and 2.53 g/cc, respectively. Based on these values, the average porosity for the wall samples was computed to be 0.372 and for the floor samples, 0.427. Moisture content-pressure head relations for each sample were determined using the pressure plate method. The moisture characteristic curves generated from these data have shapes similar to those of a silty sand, with volumetric moisture contents of less than 7% at 33.4 bars. Unsaturated hydraulic conductivity was estimated using the computer model of van Genuchten (1978), which is based on the theoretical developments of Mualem (1976). Results indicate that at near-surface in situ moisture contents, the unsaturated hydraulic conductivity for both wall and floor samples is less than 10{sup {minus}8} cm/sec. 15 refs., 12 figs., 4 tabs.

Daffern, D.D.; Ebeling, L.L.; Cox, W.B.

1990-11-01T23:59:59.000Z

65

The Influence of Proposed Repository Thermal Load on Multiphase Flow and Heat Transfer in the Unsaturated Zone of Yucca Mountain  

E-Print Network [OSTI]

development of fluid flow and heat transfer models at otherTOUGH2 code [22]. Fluid flow and heat-transfer processes inand heat transfer through fractured rock is based on the DKM method. This approach considers global fluid and

Wu, Y.-S.; Mukhopadhyay, Sumit; Zhang, Keni; Bodvarsson, G.S.

2006-01-01T23:59:59.000Z

66

Annual report on monitoring of the unsaturated zone and recharge areas at INEL to the state of Idaho INEL Oversight Committee  

SciTech Connect (OSTI)

During the early years of the INEL, the USGS conducted extensive studies (sitewide drilling program) of the geology and hydrology of the area collecting varied data over the years. The unsaturated zone has not received much attention until recently. The studies that have been done are a result of problems or concerns arising from liquid radioactive waste disposal. The TRA facility has the most information published about its waste disposal activities. The ICPP has less data about the unsaturated zone due to the fact that most waste water disposal has been to a well. Little is known about the effect of waste water disposal at the NRF on the unsaturated zone. Essentially no information was found about waste disposal activities at other facilities, primarily because there does not appear to be any reported problems associated with waste water disposal at these locations. The RWMC has received much attention in the last few years as the result of being priority No. 1 in the superfund clean up of the INEL. A considerable amount of data are available describing the unsaturated zone at the RWMC. These data have been collected to field calibrate a radionuclide migration model for the RWMC.

King, B.; Bloomsburg, G.; Horn, D.; Liou, J.; Finnie, J.

1992-12-31T23:59:59.000Z

67

Annual report on monitoring of the unsaturated zone and recharge areas at INEL to the state of Idaho INEL Oversight Committee  

SciTech Connect (OSTI)

During the early years of the INEL, the USGS conducted extensive studies (sitewide drilling program) of the geology and hydrology of the area collecting varied data over the years. The unsaturated zone has not received much attention until recently. The studies that have been done are a result of problems or concerns arising from liquid radioactive waste disposal. The TRA facility has the most information published about its waste disposal activities. The ICPP has less data about the unsaturated zone due to the fact that most waste water disposal has been to a well. Little is known about the effect of waste water disposal at the NRF on the unsaturated zone. Essentially no information was found about waste disposal activities at other facilities, primarily because there does not appear to be any reported problems associated with waste water disposal at these locations. The RWMC has received much attention in the last few years as the result of being priority No. 1 in the superfund clean up of the INEL. A considerable amount of data are available describing the unsaturated zone at the RWMC. These data have been collected to field calibrate a radionuclide migration model for the RWMC.

King, B.; Bloomsburg, G.; Horn, D.; Liou, J.; Finnie, J.

1992-01-01T23:59:59.000Z

68

An integrated methodology for characterizing flow and transport processes in fractured rock  

E-Print Network [OSTI]

Unsaturated Zone, Yucca Mountain, Nevada. Water-Resourcesof the unsaturated zone of Yucca Mountain, NV from three-in fractured tuffs of Yucca Mountain, Vadose Zone Journal,

Wu, Yu-Shu

2007-01-01T23:59:59.000Z

69

The Yucca Mountain Project repository sealing program  

SciTech Connect (OSTI)

Yucca Mountain is being characterized for the development of a high-level nuclear waste repository. The repository is planned to be located in the unsaturated zone in fractured, welded tuff. Sealing of the repository is one element of the Yucca Mountain Project. This paper presents a description of the current sealing design options, design requirements, and the design constraints. Design options for the shafts include anchor-to-bedrock seals, shaft fill, and settlement plugs; in the underground facility, they include drift seals, drainage channels, sumps, and bulkheads. Design requirements are those quantitative requirements imposed on the sealing design options to achieve a desired level of performance. For example, a design requirement could be a restriction on the hydraulic conductivity of a design option. Constraints are restrictions placed on the repository design by the sealing design. An example of a constraint could be establishing the drainage pattern to direct flow from emplacement drifts to nonemplacement drifts. As (1) additional hydrogeologic data are obtained through site characterization, (2) approaches to allocating performance to various subsystems within the Yucca Mountain Project are refined, and (3) the exploratory shafts and the associated testing results are developed, the design requirements and constraints may be modified and used in developing the License Application Design.

Fernandez, J.A.; Hinkebein, T.E

1989-12-01T23:59:59.000Z

70

Limited hydrologic response to Pleistocene climate change in deep vadose zones --Yucca Mountain, Nevada  

E-Print Network [OSTI]

and sites viewed as favorable for long-term disposal or storage of hazardous waste. Hydrologic responses, and as these environments are being considered as sites for long-term isolation of toxic waste. However, the flow of small the movement of water through thick vadose zones, especially on time scales encompassing long-term climate

Reiners, Peter W.

71

Geology of the Yucca Mountain Region, Chapter in Stuckless, J.S., ED., Yucca Mountain, Nevada - A Proposed Geologic Repository for High-Level Radioactive Waste  

SciTech Connect (OSTI)

Yucca Mountain has been proposed as the site for the Nation's first geologic repository for high-level radioactive waste. This chapter provides the geologic framework for the Yucca Mountain region. The regional geologic units range in age from late Precambrian through Holocene, and these are described briefly. Yucca Mountain is composed dominantly of pyroclastic units that range in age from 11.4 to 15.2 Ma. The proposed repository would be constructed within the Topopah Spring Tuff, which is the lower of two major zoned and welded ash-flow tuffs within the Paintbrush Group. The two welded tuffs are separated by the partly to nonwelded Pah Canyon Tuff and Yucca Mountain Tuff, which together figure prominently in the hydrology of the unsaturated zone. The Quaternary deposits are primarily alluvial sediments with minor basaltic cinder cones and flows. Both have been studied extensively because of their importance in predicting the long-term performance of the proposed repository. Basaltic volcanism began about 10 Ma and continued as recently as about 80 ka with the eruption of cones and flows at Lathrop Wells, approximately 10 km south-southwest of Yucca Mountain. Geologic structure in the Yucca Mountain region is complex. During the latest Paleozoic and Mesozoic, strong compressional forces caused tight folding and thrust faulting. The present regional setting is one of extension, and normal faulting has been active from the Miocene through to the present. There are three major local tectonic domains: (1) Basin and Range, (2) Walker Lane, and (3) Inyo-Mono. Each domain has an effect on the stability of Yucca Mountain.

J.S. Stuckless; D. O'Leary

2006-09-25T23:59:59.000Z

72

TOUGH2 Software Qualification  

E-Print Network [OSTI]

Flow Calculations for Yucca Mountain Groundwater Travel TimeUnsaturated Zone at Yucca Mountain, Nevada, Proceedings ofthe Unsaturated Zone at Yucca Mountain, Nevada, Radioactive

2010-01-01T23:59:59.000Z

73

Flow focusing in unsaturated fracture networks: A numerical investigation  

SciTech Connect (OSTI)

A numerical modeling study is presented to investigate flow-focusing phenomena in a large-scale fracture network, constructed using field data collected from the unsaturated zone of Yucca Mountain, Nevada, the proposed repository site for high-level nuclear waste. The two-dimensional fracture network for an area of 100 m x 150 m contains more than 20,000 fractures. Steady-state unsaturated flow in the fracture network is investigated for different boundary conditions and rock properties. Simulation results indicate that flow paths are generally vertical, and that horizontal fractures mainly provide pathways between neighboring vertical paths. In addition to fracture properties, flow-focusing phenomena are also affected by rock-matrix permeability, with lower matrix permeability leading to a high degree of flow focusing. The simulation results further indicate that the average spacing between flow paths in a layered system tends to increase and flow tends to becomes more focused, with depth.

Zhang, Keni; Wu, Yu-Shu; Bodvarsson, G.S.; Liu, Hui-Hai

2003-04-17T23:59:59.000Z

74

Field-Scale Sulfur Hexafluoride Tracer Experiment to Understand Long Distance Gas Transport in the Deep Unsaturated Zone  

Science Journals Connector (OSTI)

...transport from a LLRW disposal area, but no such...was supported by funding from the following...an arid site for disposal of low-level...tuffs from the Yucca Mountain area, Nye County...tritium in arid disposal sites. Water Resour...

Michelle A. Walvoord; Brian J. Andraski; Christopher T. Green; David A. Stonestrom; Robert G. Striegl

75

Geothermal areas as analogues to chemical processes in the near-field and altered zone of the potential Yucca Mountain, Nevada repository  

SciTech Connect (OSTI)

The need to bound system performance of the potential Yucca Mountain repository for thousands of years after emplacement of high-level nuclear waste requires the use of computer codes. The use of such codes to produce reliable bounds over such long time periods must be tested using long-lived natural and historical systems as analogues. The geothermal systems of the Taupo Volcanic Zone (TVZ) in New Zealand were selected as the site most amenable to study. The rocks of the TVZ are silicic volcanics that are similar in composition to Yucca Mountain. The area has been subjected to temperatures of 25 to 300 C which have produced a variety of secondary minerals similar to those anticipated at Yucca Mountain. The availability of rocks, fluids and fabricated materials for sampling is excellent because of widespread exploitation of the systems for geothermal power. Current work has focused on testing the ability of the EQ3/6 code and thermodynamic data base to describe mineral-fluid relations at elevated temperatures. Welfare starting long-term dissolution/corrosion tests of rocks, minerals and manufactured materials in natural thermal features in order to compare laboratory rates with field-derived rates. Available field data on rates of silica precipitation from heated fluids have been analyzed and compared to laboratory rates. New sets of precipitation experiments are being planned. The microbially influenced degradation of concrete in the Broadlands-Ohaaki geothermal field is being characterized. The authors will continue to work on these projects in FY 1996 and expand to include the study of naturally occurring uranium and thorium series radionuclides, as a prelude to studying radionuclide migration in heated silicic volcanic rocks. 32 refs.

Bruton, C.J.; Glassley, W.E.; Meike, A.

1995-02-01T23:59:59.000Z

76

Unsaturated flow and transport through a fault embedded in fractured welded tuff  

E-Print Network [OSTI]

at Yucca Mountain, Nevada. This experiment involved the release of $82,000 L of water over a period of 17 at Yucca Mountain is the transport of radio- nuclides through unsaturated fractured rock that lies between-per- meability domains. [3] Field investigations and numerical studies of Yucca Mountain have been conducted over

Hu, Qinhong "Max"

77

The use of chlorine isotope measurements to trace water movements at Yucca Mountain  

SciTech Connect (OSTI)

The rates of water movements in the tuffs at Yucca Mountain are important for assessing the performance of a potential high-level nuclear waste repository. Measurements of cosmogenic 3.0 {times} 10{sup 5} yr {sup 36}Cl in tuff from the unsaturated zone and in water from the saturated zone can provide information about water movements over times of 10{sup 15} to 10{sup 6} years. The data derived from the analysis of cuttings from a dry-drilled hole at Yucca Mountain indicate the presence of a {sup 36}Cl background that must be taken into account for proper interpretation of the {sup 36}Cl interpretation of the {sup 36}Cl results. Similarly, the {sup 36}Cl measured in water from the saturated zone requires additional work for correct interpretation. Fallout of {sup 36}Cl from nuclear weapons tests between 1952 and 1962 provided a tracer for an infiltration study. Measurements of the {sup 36}Cl bomb pulse in tuffs from the unsaturated zone show potential for tracing recent water flow in faults and fractures. 5 refs.

Norris, A.E.

1989-08-01T23:59:59.000Z

78

Data Qualification Report: Precipitation Chloride Data for Use on the Yucca Mountain Project  

SciTech Connect (OSTI)

The data covered by this qualification report have been cited in analysis/model reports (AMRs) to support the Site Recommendation in determining the suitability of Yucca Mountain as a repository for high level nuclear waste. Those analyses cited both qualified and unqualified hydrochemical data. This report evaluates unqualified precipitation chloride data based on the pedigree of the data and within the context of supporting analyses on the Yucca Mountain Project (YMP). The following AMRs use the unqualified chloride data considered in this report: (1) AMR S0040, ''Geochemical and Isotopic Constraints on Groundwater Flow Directions, Mixing and Recharge at Yucca Mountain'' (ANL-NBS-HS-000021) (Kwicklis 2000)--an analysis of groundwater recharge rates, flow directions and velocities, and mixing proportions of water from different source areas based on groundwater geochemical and isotopic data. (2) AMR U0085, ''Analysis of Geochemical Data for the Unsaturated Zone'' (ANL-NBS-HS-000017) (Fabryka-Martin 2000)--identifies fluid geochemical parameters for the unsaturated zone, local precipitation, and surface water; discusses the occurrence and origins of fracture minerals; and presents a thermal history of the unsaturated zone. These data are being evaluated for inclusion in technical products to include AMRs and Process Modeling Reports (PMRs) that support the Site Recommendation and that may also be used to support the License Application. A finding that the precipitation chloride data are qualified means that the data are adequate for generalized use and can be appropriately used in a wide variety of applications, so long as consideration is given to limitations on the accuracy, precision and representativeness of the data for an intended use in a technical product.

C. Wilson

2000-09-30T23:59:59.000Z

79

Mixing Cell Model: A One-Dimensional Numerical Model for Assessment of Water Flow and Contaminant Transport in the Unsaturated Zone  

SciTech Connect (OSTI)

This report describes the Mixing Cell Model code, a one-dimensional model for water flow and solute transport in the unsaturated zone under steady-state or transient flow conditions. The model is based on the principles and assumptions underlying mixing cell model formulations. The unsaturated zone is discretized into a series of independent mixing cells. Each cell may have unique hydrologic, lithologic, and sorptive properties. Ordinary differential equations describe the material (water and solute) balance within each cell. Water flow equations are derived from the continuity equation assuming that unit-gradient conditions exist at all times in each cell. Pressure gradients are considered implicitly through model discretization. Unsaturated hydraulic conductivity and moisture contents are determined by the material-specific moisture characteristic curves. Solute transport processes include explicit treatment of advective processes, first-order chain decay, and linear sorption reactions. Dispersion is addressed through implicit and explicit dispersion. Implicit dispersion is an inherent feature of all mixing cell models and originates from the formulation of the problem in terms of mass balance around fully mixed volume elements. Expressions are provided that relate implicit dispersion to the physical dispersion of the system. Two FORTRAN codes were developed to solve the water flow and solute transport equations: (1) the Mixing-Cell Model for Flow (MCMF) solves transient water flow problems and (2) the Mixing Cell Model for Transport (MCMT) solves the solute transport problem. The transient water flow problem is typically solved first by estimating the water flux through each cell in the model domain as a function of time using the MCMF code. These data are stored in either ASCII or binary files that are later read by the solute transport code (MCMT). Code output includes solute pore water concentrations, water and solute inventories in each cell and at each specified output time, and water and solute fluxes through each cell and specified output time. Computer run times for coupled transient water flow and solute transport were typically several seconds on a 2 GHz Intel Pentium IV desktop computer. The model was benchmarked against analytical solutions and finite-element approximations to the partial differential equations (PDE) describing unsaturated flow and transport. Differences between the maximum solute flux estimated by the mixing-cell model and the PDE models were typically less than two percent.

A. S. Rood

2009-04-01T23:59:59.000Z

80

Mixing Cell Model: A One-Dimensional Numerical Model for Assessment of Water Flow and Contaminant Transport in the Unsaturated Zone  

SciTech Connect (OSTI)

This report describes the Mixing Cell Model code, a one-dimensional model for water flow and solute transport in the unsaturated zone under steady-state or transient flow conditions. The model is based on the principles and assumptions underlying mixing cell model formulations. The unsaturated zone is discretized into a series of independent mixing cells. Each cell may have unique hydrologic, lithologic, and sorptive properties. Ordinary differential equations describe the material (water and solute) balance within each cell. Water flow equations are derived from the continuity equation assuming that unit-gradient conditions exist at all times in each cell. Pressure gradients are considered implicitly through model discretization. Unsaturated hydraulic conductivity and moisture contents are determined by the material-specific moisture characteristic curves. Solute transport processes include explicit treatment of advective processes, first-order chain decay, and linear sorption reactions. Dispersion is addressed through implicit and explicit dispersion. Implicit dispersion is an inherent feature of all mixing cell models and originates from the formulation of the problem in terms of mass balance around fully mixed volume elements. Expressions are provided that relate implicit dispersion to the physical dispersion of the system. Two FORTRAN codes were developed to solve the water flow and solute transport equations: (1) the Mixing-Cell Model for Flow (MCMF) solves transient water flow problems and (2) the Mixing Cell Model for Transport (MCMT) solves the solute transport problem. The transient water flow problem is typically solved first by estimating the water flux through each cell in the model domain as a function of time using the MCMF code. These data are stored in either ASCII or binary files that are later read by the solute transport code (MCMT). Code output includes solute pore water concentrations, water and solute inventories in each cell and at each specified output time, and water and solute fluxes through each cell and specified output time. Computer run times for coupled transient water flow and solute transport were typically several seconds on a 2 GHz Intel Pentium IV desktop computer. The model was benchmarked against analytical solutions and finite-element approximations to the partial differential equations (PDE) describing unsaturated flow and transport. Differences between the maximum solute flux estimated by the mixing-cell model and the PDE models were typically less than two percent.

A. S. Rood

2010-10-01T23:59:59.000Z

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81

Yucca Mountain  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Yucca Mountain We are applying our unique scientific and engineering capabilities to ensure the safety of the nation's first high-level nuclear waste repository. 8 08 FACT SHEET...

82

Preparing to Submit a License Application for Yucca Mountain  

SciTech Connect (OSTI)

In 1982, the U.S. Congress passed the Nuclear Waste Policy Act, a Federal law that established U.S. policy for the permanent disposal of spent nuclear fuel and high-level radioactive waste. Congress amended the Act in 1987, directing the Department of Energy to study only Yucca Mountain, Nevada as the site for a permanent geologic repository. As the law mandated, the Department evaluated Yucca Mountain to determine its suitability as the site for a permanent geologic repository. Decades of scientific studies demonstrated that Yucca Mountain would protect workers, the public, and the environment during the time that a repository would be operating and for tens of thousands of years after closure of the repository. A repository at this remote site would also: preserve the quality of the environment; allow the environmental cleanup of Cold War weapons facilities; provide the nation with additional protection from acts of terrorism; and support a sound energy policy. Throughout the scientific evaluation of Yucca Mountain, there has been no evidence to disqualify Yucca Mountain as a suitable site for the permanent disposal of spent nuclear fuel and high-level radioactive waste. Upon completion of site characterization, the Secretary of Energy considered the results and concluded that a repository at Yucca Mountain would perform in a manner that protects public health and safety. The Secretary recommended the site to the President in February 2002; the President agreed and recommended to Congress that the site be approved. The Governor of Nevada submitted a notice of disapproval, and both houses of Congress acted to override the disapproval. In July 2002, the President's approval allowed the Department to begin the process of submittal of a license application for Yucca Mountain as the site for the nation's first repository for spent nuclear fuel and high-level radioactive waste. Yucca Mountain is located on federal land in Nye County in southern Nevada, an arid region of the United States, approximately 100 miles (160 kilometers) northwest of Las Vegas (Figure 1). The location is remote from population centers, and there are no permanent residents within approximately 14 miles (23 km) of the site. Overall, Nye County has a population density of about two persons per square mile (two persons per 2.5 square km); in the vicinity of Yucca Mountain, it is significantly less. Yucca Mountain is a series of north-south-trending ridges extending approximately 25 miles (40 km), and consists of successive layers of fine-grained volcanic tuffs, millions of years old, underlain by older carbonate rocks. The alternating layers of welded and nonwelded volcanic tuffs have differing hydrologic properties that significantly impact the manner in which water moves through the mountain. The repository horizon will be in welded tuff located in the unsaturated zone, more than 1,000 feet (300 meters) above the water table in the present-day climate, and is expected to remain well above the water table during wetter future climate conditions. Future meteorology and climatology at Yucca Mountain are important elements in understanding the amount of water available to potentially interact with the waste.

W.J. Arthur; M.D. Voegele

2005-03-14T23:59:59.000Z

83

Predictions of tracer transport in interwell tracer tests at the C-Hole complex. Yucca Mountain site characterization project report milestone 4077  

SciTech Connect (OSTI)

This report presents predictions of tracer transport in interwell tracer tests that are to be conducted at the C-Hole complex at the Nevada Test Site on behalf of the Yucca Mountain Site Characterization Project. The predictions are used to make specific recommendations about the manner in which the tracer test should be conducted to best satisfy the needs of the Project. The objective of he tracer tests is to study flow and species transport under saturated conditions in the fractured tuffs near Yucca Mountain, Nevada, the site of a potential high-level nuclear waste repository. The potential repository will be located in the unsaturated zone within Yucca Mountain. The saturated zone beneath and around the mountain represents the final barrier to transport to the accessible environment that radionuclides will encounter if they breach the engineered barriers within the repository and the barriers to flow and transport provided by the unsaturated zone. Background information on the C-Holes is provided in Section 1.1, and the planned tracer testing program is discussed in Section 1.2.

Reimus, P.W.

1996-09-01T23:59:59.000Z

84

Applications of isotope geochemistry to the reconstruction of Yucca Mountain, Nevada, paleohydrology -- Status of investigations: June 1996  

SciTech Connect (OSTI)

Tunneling of the Exploratory Studies Facility has offered the opportunity to sample and examine occurrences of secondary mineralization found in the unsaturated-zone tuffs of Yucca Mountain, nevada. Petrographic and paragenetic analyses, calcite and silica-phase stable isotopic analyses, and preliminary strontium tracer isotope and radiocarbon age analyses of these samples indicate that (1) an early stage of secondary mineralization consisting largely of chalcedony and quartz, but possibly with or slightly preceded by calcite, probably formed at warmer than ambient temperatures; (2) later secondary mineralization consisting of calcite and opal appears completely consistent with formation from percolation of surface infiltration whose solute load and carbon isotopic compositions reflect passage through the overlying soils; (3) based on textural studies, all unsaturated-zone secondary mineral occurrences exposed within the Exploratory Studies Facility tunnel, with the exception of the vapor-phase assemblages that formed at high temperatures during cooling of the tuffs, probably formed in unsaturated settings; and (4) calcite radiocarbon ages, based on preliminary results, have not been compromised by post-depositional exchange with carbon-bearing water and gases in the unsaturated zone.

Whelan, J.F.; Moscati, R.J.; Allerton, S.B.M.; Marshall, B.D.

1998-11-01T23:59:59.000Z

85

Flow calculations for Yucca Mountain groundwater travel time (GWTT-95)  

SciTech Connect (OSTI)

In 1983, high-level radioactive waste repository performance requirements related to groundwater travel time were defined by NRC subsystem regulation 10 CFR 60.113. Although DOE is not presently attempting to demonstrate compliance with that regulation, understanding of the prevalence of fast paths in the groundwater flow system remains a critical element of any safety analyses for a potential repository system at Yucca Mountain, Nevada. Therefore, this analysis was performed to allow comparison of fast-path flow against the criteria set forth in the regulation. Models developed to describe the conditions for initiation, propagation, and sustainability of rapid groundwater movement in both the unsaturated and saturated zones will form part of the technical basis for total- system analyses to assess site viability and site licensability. One of the most significant findings is that the fastest travel times in both unsaturated and saturated zones are in the southern portion of the potential repository, so it is recommended that site characterization studies concentrate on this area. Results support the assumptions regarding the importance of an appropriate conceptual model of groundwater flow and the incorporation of heterogeneous material properties into the analyses. Groundwater travel times are sensitive to variation/uncertainty in hydrologic parameters and in infiltration flux at upper boundary of the problem domain. Simulated travel times are also sensitive to poorly constrained parameters of the interaction between flow in fractures and in the matrix.

Altman, S.J.; Arnold, B.W.; Barnard, R.W.; Barr, G.E.; Ho, C.K.; McKenna, S.A.; Eaton, R.R.

1996-09-01T23:59:59.000Z

86

Method development and strategy for the characterization of complexly faulted and fractured rhyolitic tuffs, Yucca Mountain, Nevada  

SciTech Connect (OSTI)

The planned high-level nuclear waste repository at Yucca Mountain, Nevada, would exist in unsaturated, fractured welded tuff. One possible contaminant pathway to the accessible environment is transport by groundwater infiltrating to the water table and flowing through the saturated zone. Therefore, an effort to characterize the hydrology of the saturated zone is being undertaken in parallel with that of the unsaturated zone. As a part of the saturated zone investigation, there wells-UE-25c{number_sign}1, UE-25c{number_sign}2, and UE-25c{number_sign}3 (hereafter called the c-holes)-were drilled to study hydraulic and transport properties of rock formations underlying the planned waste repository. The location of the c-holes is such that the formations penetrated in the unsaturated zone occur at similar depths and with similar thicknesses as at the planned repository site. In characterizing a highly heterogeneous flow system, several issues emerge. (1) The characterization strategy should allow for the virtual impossibility to enumerate and characterize all heterogeneities. (2) The methodology to characterize the heterogeneous flow system at the scale of the well tests needs to be established. (3) Tools need to be developed for scaling up the information obtained at the well-test scale to the larger scale of the site. In the present paper, the characterization strategy and the methods under development are discussed with the focus on the design and analysis of the field experiments at the c-holes.

Karasaki, K. [Lawrence Berkeley Lab., CA (United States); Galloway, D. [Geological Survey, Sacramento, CA (United States)

1991-06-01T23:59:59.000Z

87

Unclassified Sources Term and Radionuclide Data for Corrective Action Unit 97: Yucca Flat/Climax Mine, Nevada Test Site, Nevada, Revision 2  

SciTech Connect (OSTI)

This report documents the evaluation of the information and data available on the unclassified source term and radionuclide contamination for CAU 97: Yucca Flat/Climax Mine. The total residual inventory of radionuclides associated with one or more tests is known as the radiologic source term (RST). The RST is comprised of radionuclides in water, glass, or other phases or mineralogic forms. The hydrologic source term (HST) of an underground nuclear test is the portion of the total RST that is released into the groundwater over time following the test. In this report, the HST represents radionuclide release some time after the explosion and does not include the rapidly evolving mechanical, thermal, and chemical processes during the explosion. The CAU 97: Yucca Flat/Climax Mine has many more detonations and a wider variety of settings to consider compared to other CAUs. For instance, the source term analysis and evaluation performed for CAUs 101 and 102: Central and Western Pahute Mesa and CAU 98: Frenchman Flat did not consider vadose zone attenuation because many detonations were located near or below the water table. However, the large number of Yucca Flat/Climax Mine tests and the location of many tests above the water table warrant a more robust analysis of the unsaturated zone. The purpose of this report is to develop and document conceptual models of the Yucca Flat/Climax Mine HST for use in implementing source terms for the Yucca Flat/Climax Mine models. This document presents future plans to incorporate the radionuclide attenuation mechanisms due to unsaturated/multiphase flow and transport within the Yucca Flat CAU scale modeling. The important processes that influence radionuclide migration for the unsaturated and saturated tests in alluvial, volcanic, and carbonate settings are identified. Many different flow and transport models developed by Lawrence Livermore National Laboratory (LLNL) and Los Alamos National Laboratory (LANL), including original modeling of multiphase flow and transport by the Stoller-Navarro Joint Venture (SNJV), are integrated to form a general understanding of how the RST relates to the HST. This report is unlike the Frenchman Flat source term analysis because it does not calculate the HST for each test. Instead, this work only identifies the important processes that must be considered when the CAU-transport modeling is performed.

Peter Martian

2009-08-01T23:59:59.000Z

88

An efficient parallel-computing method for modeling nonisothermal multiphase flow and multicomponent transport in porous  

E-Print Network [OSTI]

numerical model simulating flow of moisture in the unsaturated zone of Yucca Mountain, Nevada; the second

Elmroth, Erik

89

Office Address: Dept. of Petroleum Engineering Colorado School of Mines  

E-Print Network [OSTI]

, and Zhongbo Yu, "Assessment of Radionuclide Transport Uncertainty in the Unsaturated Zone of Yucca Mountain

Ajo-Franklin, Jonathan

90

Modeling acid-gas generation from boiling chloride brines  

E-Print Network [OSTI]

of the unsaturated zone at Yucca Mountain, Nevada. J. ofwaste emplacement tunnels at Yucca Mountain, Nevada. J. ofScale Heater Test at Yucca Mountain. International Journal

Zhang, Guoxiang

2010-01-01T23:59:59.000Z

91

LOOKING PAST YUCCA MOUNTAIN  

Science Journals Connector (OSTI)

LOOKING PAST YUCCA MOUNTAIN ... NUCLEAR WASTE: Blue-ribbon panel calls for interim storage of spent fuel ...

GLENN HESS

2011-08-08T23:59:59.000Z

92

Blowup at Yucca Mountain  

Science Journals Connector (OSTI)

...States waste disposal Yucca Mountain GeoRef, Copyright...attracted enough funding for a proof-of-concept...ATMI id zero? Yucca Mountain, Nevada, Uk...pluto-nium disposal (Science...mate-rial-i.e., Yucca Mountain. He says he...

Gary Taubes

1995-06-30T23:59:59.000Z

93

Unclassified Source Term and Radionuclide Data for Corrective Action Unit 97: Yucca Flat/Climax Mine, Nevada Test Site, Nevada, Revision 1  

SciTech Connect (OSTI)

This report documents the evaluation of the information and data available on the unclassified source term and radionuclide contamination for CAU 97: Yucca Flat/Climax Mine. The total residual inventory of radionuclides associated with one or more tests is known as the radiologic source term (RST). The RST is comprised of radionuclides in water, glass, or other phases or mineralogic forms. The hydrologic source term (HST) of an underground nuclear test is the portion of the total RST that is released into the groundwater over time following the test. In this report, the HST represents radionuclide release some time after the explosion and does not include the rapidly evolving mechanical, thermal, and chemical processes during the explosion. The CAU 97: Yucca Flat/Climax Mine has many more detonations and a wider variety of settings to consider compared to other CAUs. For instance, the source term analysis and evaluation performed for CAUs 101 and 102: Central and Western Pahute Mesa and CAU 98: Frenchman Flat did not consider vadose zone attenuation because many detonations were located near or below the water table. However, the large number of Yucca Flat/Climax Mine tests and the location of many tests above the water table warrant a more robust analysis of the unsaturated zone.

Peter Martian

2009-05-01T23:59:59.000Z

94

A description and status of the Yucca Mountain Project repository sealing program  

SciTech Connect (OSTI)

Yucca Mountain is being characterized to determine its suitability as a site for a high-level nuclear waste repository. The repository would be located in the unsaturated zone in fractured, welded tuff. Sealing of the repository is one element of the Yucca Mountain Project (YMP). This paper presents a description of the repository sealing program including the sealing design options, design requirements, design constraints, and the identification of the proposed sealing materials and field tests. Design options for the shafts include anchor-to-bedrock seals, shaft fill, and settlement plugs; in the underground facility options include drift seals, drainage channels, sumps, and bulkheads. Design requirements are those quantitative requirements imposed on the sealing design options to achieve a desired level of performance. Constraints are restrictions placed on the repository design by the sealing design. As (1) additional hydrogeologic data are obtained through site characterization, (2) approaches to allocating performance to various subsystems within the YMP are refined, and (3) the exploratory shafts and the associated testing results are developed, the design requirements and constraints may be modified and used in developing the License Application Design. 1 ref., 1 fig.

Fernandez, J.A.; Hinkebein, T.E.

1989-10-01T23:59:59.000Z

95

Yucca Mountain Engineering  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Yucca Mountain Engineering Based on the success of the National Spent Nuclear Fuel Program, INL secured a lead role to provide engineering design and operations support for the...

96

Yucca Mountain | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain Yucca Mountain Yucca Mountain Addthis Fuel assembly for production of nuclear power 1 of 13 Fuel assembly for production of nuclear power Nuclear fuel pellets 2 of 13 Nuclear fuel pellets Aerial view of north end of the Yucca Mountain crest in February 1993 3 of 13 Aerial view of north end of the Yucca Mountain crest in February 1993 View of the first curve in the main drift of the Exploratory Studies Facility in October 1995 4 of 13 View of the first curve in the main drift of the Exploratory Studies Facility in October 1995 Aerial view of the crest of Yucca Mountain 5 of 13 Aerial view of the crest of Yucca Mountain Location of Yucca Mountain, Nevada 6 of 13 Location of Yucca Mountain, Nevada A scientist uses ultra-violet light to study how fluids move through rock

97

Yucca Mountain - SRSCRO  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the federal government to accept defense waste and commercial spent fuel for long-term storage. When the waste finally reached the depths of Yucca Mountain, it would be safe and...

98

Transport modeling in performance assessments for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste  

Science Journals Connector (OSTI)

Abstract This paper summarizes modeling of radionuclide transport in the unsaturated and saturated zone conducted between 1984 and 2008 to evaluate feasibility, viability, and assess compliance of a repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. One dimensional (1-D) transport for a single porosity media without lateral dispersion was solved in both the saturated zone (SZ) and unsaturated zone (UZ) for the first assessment in 1984 but progressed to a dual-porosity formulation for the UZ in the second assessment in 1991. By the time of the viability assessment, a dual-permeability transport formulation was used in the UZ. With the planned switch to a dose performance measure, individual dose from a drinking water pathway was evaluated for the third assessment in 1993 and from numerous pathways for the viability assessment in 1998 and thereafter. Stream tubes for transport in the SZ were initially developed manually but progressed to particle tracking in 1991. For the viability assessment, particle tracking was used to solve the transport equations in the 3-D UZ and SZ flow fields. To facilitate calculations, the convolution method was also used in the SZ for the viability assessment. For the site recommendation in 2001 and licensing compliance analysis in 2008, the 3-D transport results of the SZ were combined with 1-D transport results, which evaluated decay of radionuclides, in order to evaluate compliance with groundwater protection requirements. Uncertainty in flow within the unsaturated and saturated zone was generally important to explaining the spread in the individual dose performance measure.

Rob P. Rechard; Bill W. Arnold; Bruce A. Robinson; James E. Houseworth

2014-01-01T23:59:59.000Z

99

Convergent Flow in Unsaturated Fractured Chalk  

Science Journals Connector (OSTI)

...regime. The authors report a fusion of field monitoring and modeling...profiles from cores following thermonuclear testing that produced high...understanding, here we report a fusion of field monitoring and modeling...unsaturated zone through a fusion of intensive field monitoring...

Dawn M. Keim; L. Jared West; Noelle E. Odling

100

The Development and Application of Reactive Transport Modeling Techniques to Study Radionuclide Migration at Yucca Mountain, NV  

SciTech Connect (OSTI)

Yucca Mountain, Nevada has been chosen as a possible site for the first high level radioactive waste repository in the United States. As part of the site investigation studies, we need to make scientifically rigorous estimations of radionuclide migration in the event of a repository breach. Performance assessment models used to make these estimations are computationally intensive. We have developed two reactive transport modeling techniques to simulate radionuclide transport at Yucca Mountain: (1) the selective coupling approach applied to the convection-dispersion-reaction (CDR) model and (2) a reactive stream tube approach (RST). These models were designed to capture the important processes that influence radionuclide migration while being computationally efficient. The conventional method of modeling reactive transport models is to solve a coupled set of multi-dimensional partial differential equations for the relevant chemical components in the system. We have developed an iterative solution technique, denoted the selective coupling method, that represents a versatile alternative to traditional uncoupled iterative techniques and the filly coupled global implicit method. We show that selective coupling results in computational and memory savings relative to these approaches. We develop RST as an alternative to the CDR method for solving large two- or three-dimensional reactive transport simulations for cases in which one is interested in predicting the flux across a specific control plane. In the RST method, the multidimensional problem is reduced to a series of one-dimensional transport simulations along streamlines. The key assumption with RST is that mixing at the control plane approximates the transverse dispersion between streamlines. We compare the CDR and RST approaches for several scenarios that are relevant to the Yucca Mountain Project. For example, we apply the CDR and RST approaches to model an ongoing field experiment called the Unsaturated Zone Transport Test.

Viswanathan, Hari Selvi

1999-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Moving Beyond the Yucca Mountain  

E-Print Network [OSTI]

Moving Beyond the Yucca Mountain Viability Assessment U.S. Nuclear Waste Technical Review Board the Yucca Mountain site in Nevada as the sole location to be studied for possi- ble development of the Yucca Mountain site. The U.S. Department of Energy (DOE) recently published Viability As- sessment

102

A Mountain-Scale Thermal Hydrologic Model for Simulating FluidFlow and Heat Transfer in Unsaturated Fractured Rock  

SciTech Connect (OSTI)

A multidimensional, mountain-scale, thermal-hydrologic (TH) numerical model is presented for investigating unsaturated flow behavior in response to decay heat from the radioactive waste repository in the Yucca Mountain unsaturated zone (UZ), Nevada. The model, consisting of both two-dimensional (2-D) and three-dimensional (3-D) representations of the UZ repository system, is based on the current repository design, drift layout, thermal loading scenario, and estimated current and future climate conditions. This mountain-scale TH model evaluates the coupled TH processes related to mountain-scale UZ flow. It also simulates the impact of radioactive waste heat release on the natural hydrogeological system, including heat-driven processes occurring near and far away from the emplacement tunnels or drifts. The model simulations predict thermally perturbed liquid saturation, gas- and liquid-phase fluxes, and water and rock temperature elevations, as well as the changes in water flux driven by evaporation/condensation processes and drainage between drifts. These simulations provide mountain-scale thermally perturbed flow fields for assessing the repository performance under thermal loading conditions.

Wu, Yu-Shu; Mukhopadhyay, Sumit; Zhang, Keni; Bodvarsson,Gudmundur S.

2005-05-25T23:59:59.000Z

103

Overview of total system model used for the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

Abstract A summary is presented for the total system model used to represent physical processes associated with the seven scenario classes (i.e., nominal conditions, early waste package (WP) failure, early drip shield (DS) failure, igneous intrusive events, igneous eruptive events, seismic ground motion events and seismic fault displacement events) considered in the 2008 performance assessment for the proposed repository for high-level radioactive waste at Yucca Mountain, Nevada. The total system model estimates dose to an exposed individual resulting from radionuclide movement through the repository system and biosphere. Components of the total system model described in this presentation include models for (i) climate analysis, (ii) land surface infiltration and associated unsaturated zone flow, (iii) multi-scale thermal hydrology and engineered barrier system (EBS) thermal–hydrologic environment, (iv) EBS physical and chemical environment, (v) WP and DS degradation, (vi) drift seepage and drift wall condensation, (vii) waste form degradation and mobilization, (viii) water and radionuclide movement in the EBS and underlying unsaturated and saturated zones, (ix) radionuclide movement in the biosphere and resultant human exposure, and (x) processes specific to early WP and DS failures, intrusive and eruptive igneous events, and seismic ground motion and fault displacement events.

C.W. Hansen; J.T. Birkholzer; J. Blink; C.R. Bryan; Y. Chen; M.B. Gross; E. Hardin; J. Houseworth; R. Howard; R. Jarek; K.P. Lee; B. Lester; P. Mariner; P.D. Mattie; S. Mehta; F.V. Perry; B. Robinson; D. Sassani; S.D. Sevougian; J.S. Stein; M. Wasiolek

2014-01-01T23:59:59.000Z

104

A geostatistical modeling study of the effect of heterogeneity on radionuclide transport in the  

E-Print Network [OSTI]

in the unsaturated zone, Yucca Mountain Hari S. Viswanathan*, Bruce A. Robinson, Carl W. Gable, James W. Carey Earth to contaminant transport in the unsaturated zone of Yucca Mountain. However, zeolitically altered areas are lower

Gable, Carl W.

105

Gas flow to a barometric pumping well in a multilayer unsaturated Kehua You,1  

E-Print Network [OSTI]

Gas flow to a barometric pumping well in a multilayer unsaturated zone Kehua You,1 Hongbin Zhan,1. [1] When an open well is installed in an unsaturated zone, gas can flow between the subsurface and the well depending on the gas pressure gradient near the well. This well is called a barometric pumping

Zhan, Hongbin

106

Repository Safety Strategy: Strategy for Protecting Public Health and Safety after Closure of a Yucca Mountain Repository, Rev. 1  

SciTech Connect (OSTI)

The updated Strategy to Protect Public Health and Safety explains the roles that the natural and engineered systems are expected to play in achieving the objectives of a potential repository system at Yucca Mountain. These objectives are to contain the radionuclides within the waste packages for thousands of years, and to ensure that annual doses to a person living near the site will be acceptably low. This strategy maintains the key assumption of the Site Characterization Plan (DOE 1988) strategy that the potential repository level (horizon) will remain unsaturated. Thus, the strategy continues to rely on the natural attributes of the unsaturated zone for primary protection by providing a setting where waste packages assisted by other engineered barriers are expected to contain wastes for thousands of years. As in the Site Characterization Plan (DOE 1988) strategy, the natural system from the walls of the underground openings (drifts) to the human environment is expected to provide additional defense by reducing the concentrations of any radionuclides released from the waste packages. The updated Strategy to Protect Public Health and Safety is the framework for the integration of site information, repository design and assessment of postclosure performance to develop a safety case for the viability assessment and a subsequent license application. Current site information and a reference design are used to develop a quantitative assessment of performance to be compared with a performance measure. Four key attributes of an unsaturated repository system that are critical to meeting the objectives: (1) Limited water contacting the waste packages; (2) Long waste package lifetime; (3) Slow rate of release of radionuclides from the waste form; and (4) Concentration reduction during transport through engineered and natural barriers.

DOE

1998-01-01T23:59:59.000Z

107

Unsaturated macrocyclic carbonyl bridge compounds  

Science Journals Connector (OSTI)

Unsaturated macrocyclic carbonyl bridge compounds ... Catalytic Ring-Closing Metathesis of Doubly Armed, Bridged Bicyclic Sulfones. ...

C. F. H. Allen; J. A. VanAllan

1953-07-01T23:59:59.000Z

108

Abstracts of the symposium on unsaturated flow and transport modeling  

SciTech Connect (OSTI)

Abstract titles are: Recent developments in modeling variably saturated flow and transport; Unsaturated flow modeling as applied to field problems; Coupled heat and moisture transport in unsaturated soils; Influence of climatic parameters on movement of radionuclides in a multilayered saturated-unsaturated media; Modeling water and solute transport in soil containing roots; Simulation of consolidation in partially saturated soil materials; modeling of water and solute transport in unsaturated heterogeneous fields; Fluid dynamics and mass transfer in variably-saturated porous media; Solute transport through soils; One-dimensional analytical transport modeling; Convective transport of ideal tracers in unsaturated soils; Chemical transport in macropore-mesopore media under partially saturated conditions; Influence of the tension-saturated zone on contaminant migration in shallow water regimes; Influence of the spatial distribution of velocities in porous media on the form of solute transport; Stochastic vs deterministic models for solute movement in the field; and Stochastic analysis of flow and solute transport. (DMC)

Not Available

1982-03-01T23:59:59.000Z

109

Significance of apparent discrepanices in water ages derived from atmospheric radionuclides at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Cosmogenic {sup 36}Cl and {sup 14}C produced in the atmosphere are being used to estimate water residence times in the unsaturated zone at Yucca Mountain. Results thus far show a systematic discordance in that {sup 14}C-based ages are generally one to two orders of magnitude younger than {sup 36}Cl-based ages. This lack of concordance probably arises from one or more of the following reasons: (1) different transport mechanisms, e.g., vapor transport for {sup 14}C; (2) different magnitudes and timing of bomb-pulse signals; (3) mixing of waters from different flow paths; and (4) possibly inadequate methods for correcting for the effect of sample contamination by carbon or chlorine from sources other than the infiltrating water. Preliminary numerical simulation results using the FEHMN code suggest that spatial variation in infiltration rates can enhance lateral flow and mixing that leads to discordance in apparent ages depending on the dating technique. Examples are presented to show that disparate radiometric ages are inevitable and to be expected where mixing of waters of markedly different ages occurs.

Liu, B.; Fabryka-Martin, J.; Wolfsberg, A.; Robinson, B. [Los Alamos National Lab., NM (United States); Sharma, P. [Purdue Univ., Lafayette, IN (United States). Dept. of Physics

1995-02-23T23:59:59.000Z

110

9 M.y. record of southern Nevada climate from Yucca Mountain secondary minerals  

SciTech Connect (OSTI)

Yucca Mountain, Nevada, is presently the object of intense study as a potential permanent repository for the Nation`s high-level radioactive wastes. The mountain consists of a thick sequence of volcanic tuffs within which the depth to water table ranges from 500 to 700 meters below the land surface. This thick unsaturated zone (UZ), which would host the projected repository, coupled with the present day arid to semi-arid climate, is considered a favorable attribute of the site. Evaluation of the site includes defining the relation between climate variability, as the input function or driver of site- and regional-scale ground-water flow, and the possible future transport and release of radionuclides to the accessible environment. Secondary calcite and opal have been deposited in the UZ by meteoric waters that infiltrated through overlying soils and percolated through the tuffs. The oxygen isotopic composition ({delta}{sup 18}O values) of these minerals reflect contemporaneous meteoric waters and the {delta}{sup 13}C values reflect soil organic matter, and hence the resident plant community, at the time of infiltration. Recent U/Pb age determinations of opal in these occurrences, coupled with the {delta}{sup 13}C values of associated calcite, allow broadbrush reconstructions of climate patterns during the past 9 M.y.

Whelan, J.F.; Moscati, R.J.

1998-12-01T23:59:59.000Z

111

DATA QUALIFICATION REPORT: MINERALOGY DATA FOR USE ON THE YUCCA MOUNTAIN PROJECT  

SciTech Connect (OSTI)

This DQR uses the technical assessment methods according to Attachment 2 of AP-SIII.2QY Rev. 0, ICN 3, to qualify DTN LADB831321AN98.002. The data addressed in this DQR have been cited in CRWMS M&O (2000b) to support the Site Recommendation in determining the suitability of Yucca Mountain as a repository for high level nuclear waste. CRWMS M&O (2000b) refers to mineral analyses that are unqualified. Within the context of this DQR, the term mineral analyses includes: (1) the determination of the identity of specific crystalline phases from the Yucca Mountain Site by X-ray diffraction (XRD) analysis, as well as, (2) determination of mineral abundance as a percentage of the total mineral content of samples collected from drill core, side wall core and drill cuttings. These data are used among other purposes to define the spatial distribution of minerals at the Yucca Mountain Site, for correlation with geologic properties, and may be used as input in developing both unsaturated and saturated zone flow and transport models for the YMP Total System Performance Assessment. This DQR evaluates the unqualified data within DTNs within the context of supporting such kinds of studies on the YMP. The unqualified data considered in this DQR were identified and directly used in CRWMS M&O (2000b) in which the mineral analyses are used to create three-dimensional representations of mineral distributions. The purpose of this DQR is to recommend data that can be cited as qualified for use in technical products to support the License Application. The qualified data were placed in new DTNs generated as a result of the evaluation. The appropriateness and limitations (if any) of the data with respect to intended use are addressed in this DQR. In accordance with Attachment 1 of procedure AP-3.15Q, Rev. 3, ICN 2, ''Managing Technical Product Inputs'', it has been determined that the unqualified mineral abundance data for core material are not used in the direct calculation of Principal Factors for post closure safety or disruptive events.

T.L. Steinborn

2002-08-01T23:59:59.000Z

112

Characterizing unsaturated diffusion in porous tuff gravel  

SciTech Connect (OSTI)

Evaluation of solute diffusion in unsaturated porous gravel is very important for investigations of contaminant transport and remediation, risk assessment, and waste disposal (for example, the potential high-level nuclear waste repository at Yucca Mountain, Nevada). For a porous aggregate medium such as granular tuff, the total water content is comprised of surface water and interior water. The surface water component (water film around grains and pendular water between the grain contacts) could serve as a predominant diffusion pathway. To investigate the extent to which surface water films and contact points affect solute diffusion in unsaturated gravel, we examined the configuration of water using x-ray computed tomography in partially saturated gravel, and made quantitative measurements of diffusion at multiple water contents using two different techniques. In the first, diffusion coefficients of potassium chloride in 2-4 mm granular tuff at multiple water contents were calculated from electrical conductivity measurements using the Nernst-Einstein equation. In the second, we used laser ablation with inductively coupled plasma-mass spectrometry to perform micro-scale mapping, allowing the measurement of diffusion coefficients for a mixture of chemical tracers for tuff cubes and tetrahedrons having two contact geometries (cube-cube and cube-tetrahedron). The x-ray computed tomography images show limited contact between grains, and this could hinder the pathways for diffusive transport. Experimental results show the critical role of surface water in controlling transport pathways and hence the magnitude of diffusion. Even with a bulk volumetric water content of 1.5%, the measured solute diffusion coefficient is as low as 1.5 x 10{sup -14} m{sup 2}/s for tuff gravel. Currently used diffusion models relating diffusion coefficients to total volumetric water content inadequately describe unsaturated diffusion behavior in porous gravel at very low water contents.

Hu, Qinhong; Kneafsey, Timothy J.; Roberts, Jeffery J.; Tomutsa, Liviu; Wang, Joseph, S.Y.

2003-11-12T23:59:59.000Z

113

YUCCA MOUNTAIN PROJECT - A BRIEFING --  

SciTech Connect (OSTI)

This report has the following articles: Nuclear waste--a long-term national problem; Spent nuclear fuel; High-level radioactive waste; Radioactivity and the environment; Current storage methods; Disposal options; U.S. policy on nuclear waste; The focus on Yucca Mountain; The purpose and scope of the Yucca Mountain Project; The approach for permanently disposing of waste; The scientific studies at Yucca Mountain; The proposed design for a repository at Yucca Mountain; Natural and engineered barriers would work together to isolate waste; Meticulous science and technology to protect people and the environment; Licensing a repository; Transporting waste to a permanent repository; The Environmental Impact Statement for a repository; Current status of the Yucca Mountain Project; and Further information available on the Internet.

NA

2003-08-05T23:59:59.000Z

114

April 25, 1997: Yucca Mountain exploratory drilling | Department...  

Office of Environmental Management (EM)

April 25, 1997: Yucca Mountain exploratory drilling April 25, 1997: Yucca Mountain exploratory drilling April 25, 1997: Yucca Mountain exploratory drilling April 25, 1997 Workers...

115

Evidence for Gropun-Water Stratification Near Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Major- and trace-element concentrations and strontium isotope ratios (strontium-87/strontium-86) in samples of ground water potentially can be useful in delineating flow paths in the complex ground-water system in the vicinity of Yucca Mountain, Nevada. Water samples were collected from boreholes to characterize the lateral and vertical variability in the composition of water in the saturated zone. Discrete sampling of water-producing intervals in the saturated zone includes isolating borehole sections with packers and extracting pore water from core obtained by sonic drilling. Chemical and isotopic stratification was identified in the saturated zone beneath southern Fortymile Wash.

K. Futa; B.D. Marshall; Z.E. Peterman

2006-03-24T23:59:59.000Z

116

Sensitivity analysis for joint inversion of ground-penetrating radar and thermal-hydrological data from a large-scale underground heater test  

E-Print Network [OSTI]

investigations at Yucca Mountain, Nevada, the potentialin the Unsaturated Zone, Yucca Mountain, Nevada,” U.S. Geol.with the Drift Scale Test at Yucca Mountain, Nevada,” J. of

Kowalsky, M.B.; Birkholzer, J.; Peterson, J.; Finsterle, S.; Mukhopadhya y, S.; Tsang, Y.T.

2008-01-01T23:59:59.000Z

117

Yucca Mountain Project public interactions  

SciTech Connect (OSTI)

The US Department of Energy (DOE) is committed to keeping the citizens of Nevada informed about activities that relate to the high-level nuclear waste repository program. This paper presents an overview of the Yucca Mountain Project`s public interaction philosophy, objectives, activities and experiences during the two years since Congress directed the DOE to conduct site characterization activities only for the Yucca Mountain site.

Reilly, B.E.

1990-04-01T23:59:59.000Z

118

YUCCA Mountain project.  

SciTech Connect (OSTI)

This report describes the experimental work performed at Argonne National Laboratory (ANL) during fiscal year 2004 (FY 04) under the Bechtel SAIC Company, LLC (BSC) Memorandum Purchase Order (MPO), contract number B004210CM3X. Important results related to the technical bases, uncertainties, validation, and conservatism in current source term models are summarized below. An examination of specimens of commercial spent nuclear fuel (CSNF) that had been subjected to corrosion testing for up to 10 years under hydrologically unsaturated conditions was undertaken to elucidate radionuclide release pathways and mechanisms.

Ebert, W. L.; Fortner, J. A.; Finch, R. J.; Jerden, J. L.; Cunnane, J. C.

2005-03-28T23:59:59.000Z

119

Uncertainty and sensitivity analysis for the seismic scenario classes in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

Abstract Extensive work has been carried out by the US Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the US Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes uncertainty and sensitivity analysis results for the seismic ground motion scenario class and the seismic fault displacement scenario class obtained in the 2008 YM PA. The following topics are addressed for the seismic ground motion scenario class: (i) engineered barrier system conditions; (ii) release results for the engineered barrier system, unsaturated zone, and saturated zone; (iii) dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository; and (iv) expected dose to the RMEI. In addition, expected dose to the RMEI for the seismic fault displacement scenario class is also considered. The present article is the part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA.

C.W. Hansen; G.A. Behie; A. Bier; K.M. Brooks; Y. Chen; J.C. Helton; S.P. Hommel; K.P. Lee; B. Lester; P.D. Mattie; S. Mehta; S.P. Miller; C.J. Sallaberry; S.D. Sevougian; P. Vo

2014-01-01T23:59:59.000Z

120

Uncertainty and sensitivity analysis for the igneous scenario classes in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

Abstract Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes uncertainty and sensitivity analysis results for the igneous intrusive scenario class and the igneous eruptive scenario class obtained in the 2008 YM PA. The following topics are addressed for the igneous intrusive scenario class: (i) engineered barrier system conditions, (ii) release results for the engineered barrier system, unsaturated zone, and saturated zone, (iii) dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository, and (iv) expected dose to the RMEI. In addition, expected dose to the RMEI for the igneous eruptive scenario class is also considered. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA.

C.J. Sallaberry; G.A. Behie; A. Bier; K.M. Brooks; Y. Chen; C.W. Hansen; J.C. Helton; S.P. Hommel; K.P. Lee; B. Lester; P.D. Mattie; S. Mehta; S.P. Miller; S.D. Sevougian; P. Vo

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Uncertainty and sensitivity analysis for the nominal scenario class in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

Abstract Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes uncertainty and sensitivity analysis results for the nominal scenario class (i.e., for undisturbed conditions) obtained in the 2008 YM PA. The following topics are addressed: (i) uncertainty and sensitivity analysis procedures, (ii) drip shield and waste package failure, (iii) engineered barrier system conditions, (iv) radionuclide release results for the engineered barrier system, unsaturated zone, and saturated zone, and (v) dose to the reasonably maximally exposed individual specified in the NRC regulations for the YM repository. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA.

C.W. Hansen; G.A. Behie; A. Bier; K.M. Brooks; Y. Chen; J.C. Helton; S.P. Hommel; K.P. Lee; B. Lester; P.D. Mattie; S. Mehta; S.P. Miller; C.J. Sallaberry; S.D. Sevougian; P. Vo

2014-01-01T23:59:59.000Z

122

Uncertainty and sensitivity analysis for the early failure scenario classes in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

Abstract Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes uncertainty and sensitivity analysis results for the early waste package failure scenario class and the early drip shield failure scenario class obtained in the 2008 YM PA. The following topics are addressed: (i) engineered barrier system conditions, (ii) release results for the engineered barrier system, unsaturated zone, and saturated zone, (iii) dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository, and (iv) expected dose to the RMEI. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA.

C.W. Hansen; G.A. Behie; A. Bier; K.M. Brooks; Y. Chen; J.C. Helton; S.P. Hommel; K.P. Lee; B. Lester; P.D. Mattie; S. Mehta; S.P. Miller; C.J. Sallaberry; S.D. Sevougian; P. Vo

2014-01-01T23:59:59.000Z

123

Validity of batch sorption data to describe selenium transport through unsaturated tuff  

SciTech Connect (OSTI)

As part of project for characterizing Yucca Mt. as a potential site for high-level nuclear waste respository, we used UFA {trademark} technology (centifuge-induced flow) to directly measure selenite retardation coefficients and hydraulic conductivity under unsaturated conditions on two tuff samples from Yucca Mt. Retardation factor for the selenite species was 2.5 in both Yucca Mt. vitric tuff at 62.6% saturation and zeolitic nonwelded tuff from G-tunnel at 52.8% saturation. For these column experiments, we prepared a solution, using J-13 well water from NTS, with a Se conc. of 1.31 mg/L(ppM). The retardation factor of 2.5 measured for both tuffs translates into a sorption distribution coefficient K{sub d} of 0.9 mL/g for the vitric tuff and 0.8 mL/g for the zeolitic tuff. For batch sorption experiments, using the same zeolitic tuff as for the column experiments and solutions of J-13 well water with a Se conc. of 1.1 mg/L(ppM), the average K{sub d} was determined to be 0.1{+-}0.2 mL/g. Given the small K{sub d} values for Se sorption, general agreement between batch and column measurements (obtained under unsaturated conditions) was observed. Unsaturated hydraulic conductivities during the experiments were 2.5x10{sup -8} cm/s for the Yucca Mt. vitric tuff and 1.2x10{sup -8} cm/s for the zeolitic nonwelded tuff from G- tunnel.

Conca, J.L. [Tri-Cities Univ. Center, Richland, WA (United States); Triay, I.R.

1996-08-01T23:59:59.000Z

124

Information Request Yucca Mountain Site  

Broader source: Energy.gov (indexed) [DOE]

, 2008 , 2008 TO: Sue Tierney, Phil Niedzielski-Eichner, Skila Harris FROM: Chris Kouts SUBJECT: Information Request As requested, enclosed is the additional information you requested last week regarding use of engineered barriers. Please let me know if you need additional information or have any questions. A,4- -/0 7 The Suitability of the Yucca Mountain Site and the Issue of Natural Barriers as the Principal Barriers for Demonstrating Safety This paper addresses two issues that are frequently raised concerning the suitability of the Yucca Mountain site for development as a repository. The first issue is that the Yucca Mountain site is technically unsound and that an engineered barrier system is required because the site is not capable of protecting public health and safety. The second issue is

125

Drift Natural Convection and Seepage at the Yucca Mountain Repository  

E-Print Network [OSTI]

2 A Simulation Code for Yucca Mountain Transport Processes:List of Figures Yucca Mountain location, southwest1 Introduction 1.1 Yucca Mountain Repository . . . . 1.1.1

Halecky, Nicholaus Eugene

2010-01-01T23:59:59.000Z

126

Application of natural analogues in the Yucca Mountain project - overview  

E-Print Network [OSTI]

Contractor) 2000. Yucca Mountain Site Description. TDR-CRW-in silicic tuff from Yucca Mountain, Nevada. Clays and ClayHazard Analysis for Yucca Mountain, Nevada. BA0000000-01717-

Simmons, Ardyth M.

2003-01-01T23:59:59.000Z

127

Geomorphic assessment of late Quaternary volcanism in the Yucca  

Science Journals Connector (OSTI)

...volcanology waste disposal Yucca Mountain GeoRef, Copyright...investigations within the Yucca Mountain area, adjacent...the area for disposal of high-level...ACKNOWLEDGMENTS Funding for the Nevada...and by the Yucca Mountain Project Office...

128

Late Quaternary geomorphology and soils in Crater Flat, Yucca  

Science Journals Connector (OSTI)

...stratigraphy used in the Yucca Mountain area. Although the...volcanic rocks waste disposal Yucca Mountain GeoRef, Copyright...was sup- ported by funding from the Nevada Nuclear...seismotectonic stability of the Yucca Mountain area, Nevada, Nuclear...

129

NEPA Yucca Mountain Downloads | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

NEPA Yucca Mountain Downloads NEPA Yucca Mountain Downloads NEPA Yucca Mountain Downloads October 24, 2008 EIS-0250: Notice of Intent to Prepare a Supplement to the Environmental Impact Statement Geologic Repository for the Disposal of Spent Nuclear Fuel and High-level Radioactive Waste at Yucca Mountain, Nye County, Nevada October 10, 2008 EIS-0369: Floodplain Statement of Finding Rail Alignment for the Construction and Operation of a Railroad in Nevada to a Geologic Repository at Yucca Mountain, Nye County, Nevada October 10, 2008 EIS-0369: Record of Decision and Floodplain Statement of Findings Nevada Rail Alignment for the Disposal of Spent Nuclear Fuel and High-Level Radioactive Waste at Yucca Mountain, Nye County, Nevada June 2, 2008 EIS-0250-S2: Final Supplemental Environmental Impact Statement

130

Evolution of repository and waste package designs for Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste  

Science Journals Connector (OSTI)

Abstract This paper summarizes the evolution of the engineered barrier design for the proposed Yucca Mountain disposal system. Initially, the underground facility used a fairly standard panel and drift layout excavated mostly by drilling and blasting. By 1993, the layout of the underground facility was changed to accommodate construction by a tunnel boring machine. Placement of the repository in unsaturated zone permitted an extended period without backfilling; placement of the waste package in an open drift permitted use of much larger, and thus hotter packages. Hence in 1994, the underground facility design switched from floor emplacement of waste in small, single walled stainless steel or nickel alloy containers to in-drift emplacement of waste in large, double-walled containers. By 2000, the outer layer was a high nickel alloy for corrosion resistance and the inner layer was stainless steel for structural strength. Use of large packages facilitated receipt and disposal of high volumes of spent nuclear fuel. In addition, in-drift package placement saved excavation costs. Options considered for in-drift emplacement included different heat loads and use of backfill. To avoid dripping on the package during the thermal period and the possibility of localized corrosion, titanium drip shields were added for the disposal drifts by 2000. In addition, a handling canister, sealed at the reactor to eliminate further handling of bare fuel assemblies, was evaluated and eventually adopted in 2006. Finally, staged development of the underground layout was adopted to more readily adjust to changes in waste forms and Congressional funding.

Rob P. Rechard; Michael D. Voegele

2014-01-01T23:59:59.000Z

131

Statement from Ward Sproat on Yucca Mountain, Director of the...  

Energy Savers [EERE]

Ward Sproat on Yucca Mountain, Director of the Office of Civilian Radioactive Waste Management Statement from Ward Sproat on Yucca Mountain, Director of the Office of Civilian...

132

Two Independent Assessments Find the Department of Energy's Yucca...  

Office of Environmental Management (EM)

Independent Assessments Find the Department of Energy's Yucca Mountain Project is on Track Two Independent Assessments Find the Department of Energy's Yucca Mountain Project is on...

133

Structural character of the northern segment of the Paintbrush Canyon fault, Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Detailed mapping of exposed features along the northern part of the Paintbrush Canyon fault was initiated to aid in construction of the computer-assisted three-dimensional lithostratigraphic model of Yucca Mountain, to contribute to kinematic reconstruction of the tectonic history of the Paintbrush Canyon fault, and to assist in the interpretation of geophysical data from Midway Valley. Yucca Mountain is segmented into relatively intact blocks of east-dipping Miocene volcanic strata, bounded by north-striking, west-dipping high-angle normal faults. The Paintbrush Canyon fault, representing the easternmost block-bounding normal fault, separates Fran Ridge from Midway Valley and continues northward across Yucca Wash to at least the southern margin of the Timber Mountain Caldera complex. South of Yucca Wash, the Paintbrush Canyon Fault is largely concealed beneath thick Quaternary deposits. Bedrock exposures to the north reveal a complex fault, zone, displaying local north- and west-trending grabens, and rhombic pull-apart features. The fault scarp, discontinuously exposed along a mapped length of 8 km north of Yucca Wash, dips westward by 41{degrees} to 74{degrees}. Maximum vertical offset of the Rhyolite of Comb Peak along the fault measures about 210 m in Paintbrush Canyon and, on the basis of drill hole information, vertical offset of the Topopoah Spring Tuff is about 360 m near the northern part of Fran Ridge. Observed displacement along the fault in Paintbrush Canyon is down to the west with a component of left-lateral oblique slip. Unlike previously proposed tectonic models, strata adjacent to the fault dip to the east. Quaternary deposits do not appear displaced along the fault scarp north of Yucca Wash, but are displaced in trenches south of Yucca Wash.

Dickerson, R.P. [Science Applications International Corp., Golden, CO (United States); Spengler, R.W. [Geological Survey, Denver, CO (United States)

1994-12-31T23:59:59.000Z

134

Two-dimensional velocity models for paths from Pahute Mesa and Yucca Flat to Yucca Mountain; Yucca Mountain Project  

SciTech Connect (OSTI)

Vertical acceleration recordings of 21 underground nuclear explosions recorded at stations at Yucca Mountain provide the data for development of three two-dimensional crystal velocity profiles for portions of the Nevada Test Site. Paths from Area 19, Area 20 (both Pahute Mesa), and Yucca Flat to Yucca Mountain have been modeled using asymptotic ray theory travel time and synthetic seismogram techniques. Significant travel time differences exist between the Yucca Flat and Pahute Mesa source areas; relative amplitude patterns at Yucca Mountain also shift with changing source azimuth. The three models, UNEPM1, UNEPM2, and UNEYF1, successfully predict the travel time and amplitude data for all three paths. 24 refs., 34 figs., 8 tabs.

Walck, M.C.; Phillips, J.S.

1990-11-01T23:59:59.000Z

135

Yucca Mountain Archival Documents | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain Archival Documents Yucca Mountain Archival Documents Yucca Mountain Archival Documents Yucca Mountain Archival Documents From the Former Office of Civilian Radioactive Waste Management President Obama and the Department of Energy are working to restart America's nuclear industry to help meet our energy and climate challenges and create thousands of new jobs. The Administration is fully committed to ensuring that long-term storage obligations for nuclear waste are met. The President has made clear that Yucca Mountain is not an option for waste storage. The Blue Ribbon Commission on America's Nuclear Future, led by Congressman Lee Hamilton and General Brent Scowcroft, has conducted a comprehensive review of policies for managing the back end of the nuclear fuel cycle, and has offered recommendations for developing a safe,

136

Yucca Mountain Press Conference | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain Press Conference Yucca Mountain Press Conference Yucca Mountain Press Conference June 3, 2008 - 12:51pm Addthis Remarks as Prepared for Delivery for Secretary Bodman Thank you all for being here. I'm pleased to announce that this morning the Department of Energy submitted a license application to the U.S. Nuclear Regulatory Commission seeking authorization to build America's first national repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. We are confident that the NRC's rigorous review process will validate that the Yucca Mountain repository will provide for the safe disposal of spent nuclear fuel and high-level radioactive waste in a way that protects human health and our environment. This application represents the culmination of over 20 years of work by

137

1. INTRODUCTION 1.1. Yucca Mountain Project  

E-Print Network [OSTI]

1. INTRODUCTION 1.1. Yucca Mountain Project The Yucca Mountain site in Nevada has been designated as United States choice for nuclear waste repository. Yucca Mountain is in a remote dry area, on federal has been made to characterize the nature of the discontinuities of the Yucca Mountain proposed nuclear

Maerz, Norbert H.

138

Experimental and numerical simulation of dissolution and precipitation: Implications for fracture sealing at Yucca Mountain, Nevada  

E-Print Network [OSTI]

FRACTURE SEALING AT YUCCA MOUNTAIN, NEVADA Patrick F. Dobsonpotential repository at Yucca Mountain, Nevada, would reducewas flowed through crushed Yucca Mountain tuff at 94°C. The

Dobson, Patrick F.; Kneafsey, Timothy J.; Sonnenthal, Eric L.; Spycher, Nicolas; Apps, John A.

2001-01-01T23:59:59.000Z

139

Multiple-point statistical prediction on fracture networks at Yucca Mountain  

E-Print Network [OSTI]

on fracture networks at Yucca Mountain Xiaoyan Liu 1 ,systems, such as at Yucca Mountain, water flow rate andflow field behavior at the Yucca Mountain waste repository

Liu, X.Y

2010-01-01T23:59:59.000Z

140

Modeling water seepage into heated waste emplacement drifts at Yucca Mountain  

E-Print Network [OSTI]

into drifts at Yucca Mountain, Journal of ContaminantEMPLACEMENT DRIFTS AT YUCCA MOUNTAIN Jens Birkholzer, Sumitfor nuclear waste at Yucca Mountain, Nevada. Heating of rock

Birkholzer, Jens; Mukhopadhyay, Sumitra; Tsang, Yvonne

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Multiphysics processes in partially saturated fracture rock: Experiments and models from Yucca Mountain  

E-Print Network [OSTI]

Thermal Test at Yucca Mountain. ACC: MOL.19980507.0359,Unit Evaluation at Yucca Mountain, Nevada Test Site: SummaryEstimations for the Yucca Mountain Site Characterization

Rutqvist, J.

2014-01-01T23:59:59.000Z

142

Yucca Mountain and The Environment  

SciTech Connect (OSTI)

The Yucca Mountain Project places a high priority on protecting the environment. To ensure compliance with all state and federal environmental laws and regulations, the Project established an Environmental Management System. Important elements of the Environmental Management System include the following: (1) monitoring air, water, and other natural resources; (2) protecting plant and animal species by minimizing land disturbance; (3) restoring vegetation and wildlife habitat in disturbed areas; (4) protecting cultural resources; (5) minimizing waste, preventing pollution, and promoting environmental awareness; and (6) managing of hazardous and non-hazardous waste. Reducing the impacts of Project activities on the environment will continue for the duration of the Project.

NA

2005-04-12T23:59:59.000Z

143

Bomb-Pulse Chlorine-36 At The Proposed Yucca Mountain Repository Horizon: An Investigation Of Previous Conflicting Results And Collection Of New Data  

SciTech Connect (OSTI)

Previous studies by scientists at Los Alamos National Laboratory (LANL) found elevated ratios of chlorine-36 to total chloride ({sup 36}Cl/Cl) in samples of rock collected from the Exploratory Studies Facility (ESF) and the Enhanced Characterization of the Repository Block (ECRB) at Yucca Mountain as the tunnels were excavated. The data were interpreted as an indication that fluids containing 'bomb-pulse' {sup 36}Cl reached the repository horizon in the {approx}50 years since the peak period of above-ground nuclear testing. Moreover, the data support the concept that so-called fast pathways for infiltration not only exist but are active, possibly through a combination of porous media, faults and/or other geologic features. Due to the significance of {sup 36}Cl data to conceptual models of unsaturated zone flow and transport, the United States Geological Survey (USGS) was requested by the Department of Energy (DOE) to design and implement a study to validate the LANL findings. The USGS chose to drill new boreholes at select locations across zones where bomb-pulse ratios had previously been identified. The drill cores were analyzed at Lawrence Livermore National Laboratory (LLNL) for {sup 36}Cl/Cl using both active and passive leaches, with the USGS/LLNL concluding that the active leach extracted too much rock-Cl and the passive leach did not show bomb-pulse ratios. Because consensus was not reached between the USGS/LLNL and LANL on several fundamental points, including the conceptual strategy for sampling, interpretation and use of tritium ({sup 3}H) data, and the importance and interpretation of blanks, in addition to the presence or absence of bomb-pulse {sup 36}Cl, an evaluation by an independent entity, the University of Nevada, Las Vegas (UNLV), using new samples was initiated. This report is the result of that study. The overall objectives of the UNLV study were to investigate the source or sources of the conflicting results from the previous validation study, and to obtain additional data to determine whether or not there are bomb-pulse isotopes at the repository horizon. To that en4 we have engaged in discussions with previous investigators, reviewed reports, and analyzed archived samples. We have also collected new samples of rock from the ESF, soil profiles from the surface of Yucca Mountain, and opportunistic samples of seep water from inside the south ramp of the ESF.

J. Cizdziel

2006-07-28T23:59:59.000Z

144

The unsaturated hydraulic characteristics of the Bandelier Tuff  

SciTech Connect (OSTI)

This report summarizes the physical and, unsaturated hydraulic properties of the Bandelier Tuff determined from laboratory measurements made on core samples collected at Los Alamos National Laboratory. We fit new van Genuchten-type moisture retention curves to this data, which was categorized according to member of the Bandelier Tuff and subunit of the Tshirege Member. Reasonable consistency was observed for hydraulic properties and retention curves within lithologic units, while distinct differences were observed for those properties between units. With the moisture retention data, we constructed vertical profiles of in situ matric suction and hydraulic head. These profiles give an indication of the likely direction of liquid water movement within the unsaturated zone and allow comparison of core-scale and field-scale estimates of water flow and solute transport parameters. Our core-derived transport velocities are much smaller than values estimated from tritium, Cl, and NO{sub 3} contamination found recently in boreholes. The contaminant tracer-derived transport velocities from Los Alamos Canyon are greater than corederived values found for the Otowi Member, and for Mortandad Canyon, greater than core-derived values for that borehole. The significant difference found for Mortandad Canyon suggests that fracture or other fast-path transport may be important there. The relatively small difference between observed and predicted velocities at Los Alamos Canyon may mean that vadose zone transport there occurs by unsaturated matrix flow.

Rogers, D.B.; Gallaher, B.M.

1995-09-01T23:59:59.000Z

145

Microsoft Word - Yucca PCard Report.doc  

Broader source: Energy.gov (indexed) [DOE]

Inspection Report Yucca Mountain Project Purchase Card Programs INS-O-09-04 August 2009 U.S. Department of Energy Office of Inspector General Office of Inspections MEMORANDUM FOR DIRECTOR, OFFICE OF CILIVIAN RADIOACTIVE WASTE MANAGEMENT FROM: Herbert Richardson Principal Deputy Inspector General SUBJECT: INFORMATION: Inspection Report on "Yucca Mountain Purchase Card Programs" BACKGROUND Yucca Mountain Project (Project) is the Nation's first proposed storage facility for spent nuclear fuel and high-level nuclear waste. The Project is managed by the Department of Energy's (DOE) Office of Civilian Radioactive Waste Management (OCRWM). From

146

Microsoft Word - Yucca Mountain Press Conference  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tuesday, June 3, 2008 Remarks as Prepared for Delivery for Energy Secretary Samuel Bodman Yucca Mountain Press Conference National Press Club Washington, D.C. Thank you all for...

147

Final recommendations of the Peer Review Panel on the use of seismic methods for characterizing Yucca Mountain and vicinity  

SciTech Connect (OSTI)

The Peer Review Panel was charged with deciding whether seismic methods, which had been utilized at Yucca Mountain with mixed results in the past, could provide useful information about the Tertiary structure in the Yucca Mountain area. The objectives of using seismic methods at Yucca Mountain are to: (a) obtain information about the structural character of the Paleozoic-Tertiary (Pz-T) contact, and (b) obtain information about the structural and volcanic details within the Tertiary and Quaternary section. The Panel recommends that a four part program be undertaken to test the utility of seismic reflection data for characterizing the structural setting of the Yucca Mountain area. The Panel feels strongly that all four parts of the program must be completed in order to provide the highest probability of success. The four parts of the program are: (a) drill or extend a deep hole in Crater Flat to provide depth control and allow for the identification of seismic reflectors in an area where good quality seismic reflection data are expected; (b) undertake a full seismic noise test in Crater Flat, test 2D receiver arrays as well as linear arrays; perform an expanding spread test using both P and S wave sources to obtain a quick look at the reflection quality in the area and see if shear wave reflections might provide structural information in areas of unsaturated rock; (c) acquire a P wave seismic reflection profile across Crater Flat through the deep control well, across Yucca Mountain, and continuing into Jackass Flats; and (d) acquire a standard VSP (vertical seismic profiling) in the deep control well to tie the seismic data into depth and to identify reflectors correctly.

NONE

1991-01-22T23:59:59.000Z

148

New Yucca Mountain Repository Design to be Simpler, Safer and...  

Energy Savers [EERE]

New Yucca Mountain Repository Design to be Simpler, Safer and More Cost-Effective New Yucca Mountain Repository Design to be Simpler, Safer and More Cost-Effective untitled More...

149

Geohydrological models and earthquake effects at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

?Yucca Mountain, the proposed site for the high-level ... feature that extends for over 100?km. Yucca Mountain and its vicinity are underlain by faulted ... , and surrounding the core of the Timber Mountain Calde...

J. B. Davies; Charles B. Archambeau

1997-07-01T23:59:59.000Z

150

DOE Petitions for NRC Review in Yucca Mountain Proceeding | Department...  

Broader source: Energy.gov (indexed) [DOE]

Petitions for NRC Review in Yucca Mountain Proceeding DOE Petitions for NRC Review in Yucca Mountain Proceeding April 12, 2010 - 10:16am Addthis The United States Department of...

151

Analyzing flow patterns in unsaturated fractured rock of Yucca Mountain using an integrated modeling approach  

E-Print Network [OSTI]

heat flow simulations use the 3-D thermal model grid (Figuremodel grid, which is used for gas flow and ambient heat flowgrid showing a smaller model domain, used for modeling gas and heat

Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Pan, Lehua; Bodvarsson, Gudmundur S.

2008-01-01T23:59:59.000Z

152

Motion to Withdraw from Yucca Mountain application | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

from Yucca Mountain application More Documents & Publications CERTIFIED REALTY SPECIALIST Greenpower Trap Mufflerl System Heating Ventilation and Air Conditioning Efficiency...

153

Drift Natural Convection and Seepage at the Yucca Mountain Repository  

E-Print Network [OSTI]

funding, Congress amended the NWPA to direct DOE to focus research of waste disposal only on Yucca Mountain.

Halecky, Nicholaus Eugene

2010-01-01T23:59:59.000Z

154

TESTING MODELS FOR BASALTIC VOLCANISM: IMPLICATIONS FOR YUCCA MOUNTAIN, NEVADA  

E-Print Network [OSTI]

TESTING MODELS FOR BASALTIC VOLCANISM: IMPLICATIONS FOR YUCCA MOUNTAIN, NEVADA Eugene Smith 1 The determination of volcanic risk to the proposed high- level nuclear waste repository at Yucca Mountain requires, then volcanism in the future may not be a significant threat to Yucca Mountain. On the other hand, if melting

Conrad, Clint

155

Climate Change at Yucca Mountain: Lessons from Earth History  

E-Print Network [OSTI]

9 Climate Change at Yucca Mountain: Lessons from Earth History MaryLynn Musgrove and Daniel P. Schrag Yucca Mountain's suitability as a nuclear waste repository stems largely from its very dry climate the climate and hydrologic conditions at Yucca Mountain will be stable enough beyond the next ten millennia so

Schrag, Daniel

156

Progression of performance assessment modeling for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste  

Science Journals Connector (OSTI)

Abstract This paper summarizes the evolution of consequence modeling for a repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain in southern Nevada. The discussion includes four early performance assessments (PAs) conducted between 1982 and 1995 to support selection and to evaluate feasibility and three major \\{PAs\\} conducted between 1998 and 2008 to evaluate viability, recommend the site, and assess compliance. Modeling efforts in 1982 estimated dose to individuals 18 km from the site caused by volcanic eruption through the repository. Modeling in 1984 estimated releases via the groundwater pathway because of container corrosion. In combination, this early analysis supported the first environmental assessment. Analysts in 1991 evaluated cumulative release, as specified in the 1985 US radiation protection standards, via the groundwater pathway over 104 yr at a 5-km boundary by modeling waste degradation and flow/transport in the saturated and unsaturated zones. By 1992, however, the US Congress mandated a change to a dose measure. Thus, the 1993 and 1995 performance assessments improved modeling of waste container degradation to provide better estimates of radionuclide release rates out to 106 yr. The 1998 viability assessment was a major step in modeling complexity. Dose at a 20-km boundary from the repository was evaluated through 106 yr for undisturbed conditions using more elaborate modeling of flow and the addition of modules for modeling infiltration, drift seepage, the chemical environment, and biosphere transport. The 2000 assessment for the site recommendation refined the analysis. Seepage modeling was greatly improved and waste form degradation modeling included more chemical dependence. The 2008 compliance assessment for the license application incorporated the influence of the seismicity on waste package performance to evaluate dose at an ~18-km boundary.

Rob P. Rechard; Michael L. Wilson; S. David Sevougian

2014-01-01T23:59:59.000Z

157

ADVANCES IN YUCCA MOUNTAIN DESIGN  

SciTech Connect (OSTI)

Since site designation of the Yucca Mountain Project by the President, the U.S. Department of Energy (DOE) has begun the transition from the site characterization phase of the project to preparation of the license application. As part of this transition, an increased focus has been applied to the repository design. Several evolution studies were performed to evaluate the repository design and to determine if improvements in the design were possible considering advances in the technology for handling and packaging nuclear materials. The studies' main focus was to reduce and/or eliminate uncertainties in both the pre-closure and post-closure performance of the repository and to optimize operations. The scope and recommendations from these studies are the subjects of this paper and include the following topics: (1) a more phased approach for the surface facility that utilize handling and packaging of the commercial spent nuclear fuel in a dry environment rather than in pools as was presented in the site recommendation; (2) slight adjustment of the repository footprint and a phased approach for construction and emplacement of the repository subsurface; and (3) simplification of the construction, fabrication and installation of the waste package and drip shield.

Harrington, P.G.; Gardiner, J.T.; Russell, P.R.Z.; Lachman, K.D.; McDaniel, P.W.; Boutin, R.J.; Brown, N.R.; Trautner, L.J.

2003-02-27T23:59:59.000Z

158

Coordinatively unsaturated Al3+ centers as binding sites for...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Coordinatively unsaturated Al3+ centers as binding sites for active catalyst phases on ?-Al2O3. Coordinatively unsaturated Al3+ centers as binding sites for active catalyst...

159

Uncertainties in coupled thermal-hydrological processes associated with the drift scale test at Yucca Mountain, Nevada  

E-Print Network [OSTI]

Scale Test at Yucca Mountain, Nevada S. Mukhopadhyay * , Y.waste repository at Yucca Mountain, Nevada. The Drift Scalerock; Radioactive waste; Yucca Mountain, Nevada Introduction

Mukhopadhyay, Sumitra; Tsang, Y.W.

2002-01-01T23:59:59.000Z

160

Distribution of potentially hazardous phases in the subsurface at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Drilling, trenching, excavation of the Exploratory Studies Facility, and other surface and underground-distributing activities have the potential to release minerals into the environment from tuffs at Yucca Mountain, Nevada. Some of these minerals may be potential respiratory health hazards. Therefore, an understanding of the distribution of the minerals that may potentially be liberated during site-characterization and operation of the potential repository is crucial to ensuring worker and public safety. Analysis of previously reported mineralogy of Yucca Mountain tuffs using data and criteria from the International Agency for Research on Cancer (IARC) suggests that the following minerals are of potential concern: quartz, cristobalite, tridymite, opal-CT, erionite, mordenite, and palygorskite. The authors have re-evaluated the three-dimensional mineral distribution at Yucca Mountain above the static water level both in bulk-rock samples and in fractures, using quantitative X-ray powder diffraction analysis. Erionite, mordenite, and palygorskite occur primarily in fractures; the crystalline-silica minerals, quartz, cristobalite, and tridymite are major bulk-rock phases. Erionite occurs in the altered zone just above the lower Topopah Spring Member vitrophyre, and an occurrence below the vitrophyre but above the Calico Hills has recently been identified. In this latter occurrence, erionite is present in the matrix at levels up to 35 wt%. Mordenite and palygorskite occur throughout the vadose zone nearly to the surface. Opal-CT is limited to zeolitic horizons.

Guthrie, G.D. Jr.; Bish, D.L.; Chipera, S.J.; Raymond, R. Jr.

1995-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Development of a capillary wick unsaturated zone pore water sampler  

E-Print Network [OSTI]

. Many researchers, among them Kissel et al. (1973), Quisenberry and Phillips (1976), Ritchie et al. (1977), and Thomas and Phillips (1979), have shown that in structured soils, such as silt loams and clays, the majority of pezcolating water moves... glass and teflon. Three capillary wick samplers were constructed as shown in Fig. 1. Five cm diameter Pyrex tubing was attached to the glass plate with Armstrong Epoxy 271. The sections of pyrex tubing were attached to one another using steel teflon...

Holder, Michael Wayne

1989-01-01T23:59:59.000Z

162

Unsaturated Zone Arsenic Distribution and Implications for Groundwater Contamination  

Science Journals Connector (OSTI)

John A. and Katherine G. Jackson School of Geosciences, Bureau of Economic Geology, The University of Texas, University Station, Box X, Austin, Texas 78713-8924 ... (27)?Bronson, K. F.; Keeling, J. W.; Booker, J. D.; Chua, T. T.; Wheeler, T. A.; Boman, R. K.; Lascano, R. J. Influence of landscape position, soil series, and phosphorus fertilizer on cotton lint yield. ...

Robert C. Reedy; Bridget R. Scanlon; Jean-Philippe Nicot; J. Andrew Tachovsky

2007-09-14T23:59:59.000Z

163

The Yucca Mountain Project drift scale test  

SciTech Connect (OSTI)

The Yucca Mountain Project is currently evaluating the coupled thermal-mechanical-hydrological-chemical (TMHC) response of the potential repository host rock through an in situ thermal testing program. A drift scale test (DST) was constructed during 1997 and heaters were turned on in December 1997. The DST includes nine canister-sized containers with thirty operating heaters each located within the heated drift (HD) and fifty wing heaters located in boreholes in both ribs with a total power output of nominally 210kW. A total of 147 boreholes (combined length of 3.3 km) houses most of the over 3700 TMHC sensors connected with 201 km of cabling to a central data acquisition system. The DST is located in the Exploratory Studies Facility in a 5-m diameter drift approximately 50 m in length. Heating will last up to four years and cooling will last another four years. The rock mass surrounding the DST will experience a harsh thermal environment with rock surface temperatures expected to reach a maximum of about 200 C. This paper describes the process of designing the DST. The first 38 m of the 50-m long Heated Drift (HD) is dedicated to collection of data that will lead to a better understanding of the complex coupled TMHC processes in the host rock of the proposed repository. The final 12 m is dedicated to evaluating the interactions between the heated rock mass and cast-in-place (CIP) concrete ground support systems at elevated temperatures. In addition to a description of the DST design, data from site characterization, and a general description of the analyses and analysis approach used to design the test and make pretest predictions are presented. Test-scoping and pretest numerical predictions of one way thermal-hydrologic, thermal-mechanical, and thermal-chemical behaviors have been completed (TRW, 1997a). These analyses suggest that a dry-out zone will be created around the DST and a 10,000 m{sup 3} volume of rock will experience temperatures above 100 C. The HD will experience large stress increases, particularly in the crown of the drift. Thermoelastic displacements of up to about 16 mm are predicted for some thermomechanical gages. Additional analyses using more complex models will be performed during the conduct of the DST and the results compared with measured data.

Finley, R.E. [Sandia National Labs., Albuquerque, NM (United States); Blair, S.C. [Lawrence Livermore National Labs., CA (United States); Boyle, W.J. [Dept. of Energy, Las Vegas, NV (United States)] [and others

1998-06-01T23:59:59.000Z

164

Preliminary gravity and magnetic models across Midway Valley and Yucca Wash, Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Detailed gravity and ground magnetic data collected along ten traverses across Midway Valley and Yucca Wash on the eastern flank of Yucca Mountain in southwest Nevada are interpreted. These data were collected as part of an effort to evaluate faulting in the vicinity of proposed surface facilities for a potential nuclear waste repository at Yucca Mountain. Geophysical data show that Midway Valley is bounded by large gravity and magnetic anomalies associated with the Bow Ridge and Paintbrush Canyon faults, on the west side of Exile Hill and on the west flank of Fran Ridge, respectively. In addition, Midway Valley itself is characterized by a number of small-amplitude anomalies that probably reflect small-scale faulting beneath Midway Valley. Gravity and magnetic data across the northwest trending Yucca Wash and the inferred Yucca Wash fault indicate no major vertical offsets greater than 100 m using a density contrast of 0.2 to 0.3 g/cm{sup 3} along the proposed Yucca Wash fault. In addition, a broad magnetic high coincides with the approximate location of the hydrologic gradient and probably reflects moderately magnetic Topopah Spring Tuff or lavas in the Calico Hills Formation.

Ponce, D.A.; Langenheim, V.E.

1994-12-31T23:59:59.000Z

165

Sorption of radionuclides on Yucca Mountain tuffs  

SciTech Connect (OSTI)

A substantial database of sorption coefficients for important radionuclides on Yucca Mountain tuffs has been obtained by Los Alamos National Laboratory over the past ten years. Current sorption studies are focussed on validation questions and augmentation of the existing database. Validation questions concern the effects of the use of crushed instead of solid rock samples in the batch experiments, the use of oversaturated stock solutions, and variations in water/rock ratios. Sorption mechanisms are also being investigated. Database augmentation activities include determination of sorption coefficients for elements with low sorption potential, sorption on psuedocolloids, sorption on fracture lining minerals, and sorption kinetics. Sorption can provide an important barrier to the potential migration of radionuclides from the proposed repository within Yucca Mountain to the accessible environment. In order to quantify this barrier, sorption coefficients appropriate for the Yucca Mountain groundwater system must be obtained for each of the important radionuclides in nuclear waste. Los Alamos National Laboratories has conducted numerous batch (crushed-rock) sorption experiments over the past ten years to develop a sorption coefficient database for the Yucca Mountain site. In the present site characterization phase, the main goals of the sorption test program will be to validate critical sorption coefficients and to augment the existing database where important data are lacking. 11 refs., 1 fig., 3 tabs.

Meijer, A.; Triay, I.; Knight, S.; Cisneros, M.

1989-11-01T23:59:59.000Z

166

YUCCA MOUNTAIN WASTE PACKAGE CLOSURE SYSTEM  

SciTech Connect (OSTI)

The method selected for dealing with spent nuclear fuel in the US is to seal the fuel in waste packages and then to place them in an underground repository at the Yucca Mountain Site in Nevada. This article describes the Waste Package Closure System (WPCS) currently being designed for sealing the waste packages.

G. Housley; C. Shelton-davis; K. Skinner

2005-08-26T23:59:59.000Z

167

Numerical analysis of thermal-hydrological conditions in the single heater test at Yucca Mountain  

E-Print Network [OSTI]

Single Heater Test at Yucca Mountain, LBNL-39789, E.O. Law­Single Heater Test at Yucca Mountain Jens T. Birkholzer andwaste repository at Yucca Mountain. The heating phase of the

Birkholzer, Jens T.; Tsang, Yvonne W.

1998-01-01T23:59:59.000Z

168

Influence of faults on groundwater flow and transport at Yucca Mountain, Nevada  

E-Print Network [OSTI]

test well USW H- 6, Yucca Mountain area, Nye County, Nevada,by test well UE- 25p#1, Yucca Mountain Area, Nye County,assessment for Yucca Mountain-SNL second interation (TSPA-

Cohen, Andrew J.B.; Sitar, Nicholas

1999-01-01T23:59:59.000Z

169

Isotropic and deviatoric characterization of the Coalora nuclear explosion in Yucca Flats  

Science Journals Connector (OSTI)

......detonated at Yucca Flats, Nevada Test Site (NTS), are utilized...detonated at Yucca Flats, Nevada Test Site (NTS), are utilized...at the Novaya Zemlya test sites, Bull. seism. Soc...Structure at Yucca Flat, Nevada, Geophysics, 53......

Brian W. Stump; Robert E. Reinke; Kenneth H. Olsen; Lane R. Johnson

1994-03-01T23:59:59.000Z

170

Viability Assessment of a Repository at Yucca Mountain | Department of  

Broader source: Energy.gov (indexed) [DOE]

Viability Assessment of a Repository at Yucca Mountain Viability Assessment of a Repository at Yucca Mountain Viability Assessment of a Repository at Yucca Mountain Summary The Viability Assessment of a Repository at Yucca Mountain describes the nuclear waste problem and explains why the United States and other nations are considering deep geologic disposal as the solution. The overview describes why the Unites States is considering Yucca Mountain and how a monitored geologic repository would work in the mountain. It presents a repository design, an assessment of its expected performance, and an evaluation of the possible effects on people living near Yucca Mountain. Also presented is the work remaining to be completed prior to a license application, along with the estimated cost of building and operating a

171

February 14, 2002: Yucca Mountain | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

14, 2002: Yucca Mountain 14, 2002: Yucca Mountain February 14, 2002: Yucca Mountain February 14, 2002: Yucca Mountain February 14, 2002 Secretary Abraham formally recommends to President Bush that the Yucca Mountain site in Nevada be developed as the nation's first long-term geologic repository for high-level radioactive waste. "I have considered whether sound science supports the determination that the Yucca Mountain site is scientifically and technically suitable for the development of a repository," the Secretary informs the President. "I am convinced that it does. The results of this extensive investigation and the external technical reviews of this body of scientific work give me confidence for the conclusion, based on sound scientific principles, that a repository at

172

DOE Replies Support NRC Commissioners and Authority to Withdraw Yucca  

Broader source: Energy.gov (indexed) [DOE]

Replies Support NRC Commissioners and Authority to Withdraw Replies Support NRC Commissioners and Authority to Withdraw Yucca Application DOE Replies Support NRC Commissioners and Authority to Withdraw Yucca Application July 19, 2010 - 4:07pm Addthis In a reply brief filed with the NRC today, DOE explained that the arguments that it lacked authority to withdraw the pending Yucca Mountain license application are uniformly without merit. DOE's reply brief is available here. In a separate filing, DOE explained that there is no basis for arguments that two NRC Commissioners should recuse themselves from the Yucca proceeding. That brief is available here. Addthis Related Articles DOE Makes Filing with NRC in Support OF Authority to Withdraw Yucca Application DOE Defends Its Motion to Withdraw Yucca Mountain Application DOE Opposes Injunction Motion

173

E-Print Network 3.0 - analysis yucca mountain Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: polyacantha), and yucca(Yucca glauca), and in juniper scatter vegetation with <10% canopy closure with shrub... cover of mountain mahogany, skunkbrush (Rhus trilobata),...

174

E-Print Network 3.0 - assessment yucca mountain Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: polyacantha), and yucca(Yucca glauca), and in juniper scatter vegetation with <10% canopy closure with shrub... cover of mountain mahogany, skunkbrush (Rhus trilobata),...

175

Using Seismic Reflection to Locate a Tracer Testing Complex South of Yucca Mountain, Nye County, Nevada.  

E-Print Network [OSTI]

??Tracer testing in the fractured volcanic aquifer near Yucca Mountain, and in the alluvial aquifer south of Yucca Mountain, Nevada has been conducted in the… (more)

Kryder, Levi

2014-01-01T23:59:59.000Z

176

Parameter estimation from flowing fluid temperature logging data in unsaturated fractured rock using multiphase inverse modeling  

E-Print Network [OSTI]

Drift Scale Test at Yucca Mountain, Nevada, J. of Contam.the Drift Scale Test at Yucca Mountain Figure 1a. Figure 1b.pneumatic response at Yucca Mountain, Journal of Contaminant

Mukhopadhyay, S.

2009-01-01T23:59:59.000Z

177

Saturated Zone I. Overview  

E-Print Network [OSTI]

at Yucca Mountain is small (on the order of 7 mm/yr in the current climate) in compari- son to the groundwater flux laterally in the SZ be- low Yucca Mountain. Although there is a large spatial variability at Yucca Mountain to determine the amount of mixing that could occur at the SZ-UZ interface. There also

178

Drift Natural Convection and Seepage at the Yucca Mountain Repository.  

E-Print Network [OSTI]

??The decay heat from radioactive waste that is to be disposed in the once proposed geologic repository at Yucca Mountain (YM) will significantly influence the… (more)

Halecky, Nicholaus Eugene

2010-01-01T23:59:59.000Z

179

Material corrosion issues for nuclear waste disposition in Yucca Mountain  

Science Journals Connector (OSTI)

For more than two decades, an extensive scientific effort has been underway to determine whether Yucca Mountain, Nevada, is a suitable site for...

Raul B. Rebak

2008-01-01T23:59:59.000Z

180

DOE`s Yucca Mountain studies  

SciTech Connect (OSTI)

This booklet is about the disposal of high-level nuclear waste in the United States. It is for readers who have a general rather than a technical background. It discusses why scientists and engineers think high-level nuclear waste may be disposed of safely underground. It also describes why Yucca Mountain, Nevada, is being studied as a potential repository site and provides basic information about those studies.

NONE

1992-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Approaches to Quantify Potential Contaminant Transport in the Lower Carbonate Aquifer from Underground Nuclear Testing at Yucca Flat, Nevada National Security Site, Nye County, Nevada - 12434  

SciTech Connect (OSTI)

Quantitative modeling of the potential for contaminant transport from sources associated with underground nuclear testing at Yucca Flat is an important part of the strategy to develop closure plans for the residual contamination. At Yucca Flat, the most significant groundwater resource that could potentially be impacted is the Lower Carbonate Aquifer (LCA), a regionally extensive aquifer that supplies a significant portion of the water demand at the Nevada National Security Site, formerly the Nevada Test Site. Developing and testing reasonable models of groundwater flow in this aquifer is an important precursor to performing subsequent contaminant transport modeling used to forecast contaminant boundaries at Yucca Flat that are used to identify potential use restriction and regulatory boundaries. A model of groundwater flow in the LCA at Yucca Flat has been developed. Uncertainty in this model, as well as other transport and source uncertainties, is being evaluated as part of the Underground Testing Area closure process. Several alternative flow models of the LCA in the Yucca Flat/Climax Mine CAU have been developed. These flow models are used in conjunction with contaminant transport models and source term models and models of contaminant transport from underground nuclear tests conducted in the overlying unsaturated and saturated alluvial and volcanic tuff rocks to evaluate possible contaminant migration in the LCA for the next 1,000 years. Assuming the flow and transport models are found adequate by NNSA/NSO and NDEP, the models will undergo a peer review. If the model is approved by NNSA/NSO and NDEP, it will be used to identify use restriction and regulatory boundaries at the start of the Corrective Action Decision Document Corrective Action Plan (CADD/CAP) phase of the Corrective Action Strategy. These initial boundaries may be revised at the time of the Closure Report phase of the Corrective Action Strategy. (authors)

Andrews, Robert W.; Birdie, Tiraz [Navarro-INTERA LLC, Las Vegas, Nevada 89030 (United States); Wilborn, Bill; Mukhopadhyay, Bimal [National Nuclear Security Administration/Nevada Site Office, Las Vegas, Nevada 89030 (United States)

2012-07-01T23:59:59.000Z

182

PhD, 2000, The University of Manitoba, Winnipeg, Canada, Groundwater hydrology. M.Sc., 1996, International Institute for Hydraulic and Environmental Engineering, Delft,  

E-Print Network [OSTI]

Of Hydrological Parameters In Modeling Flow And Transport In The Unsaturated Zone Of Yucca Mountain, Hydrogeology Effect of the Yucca Mountain Fractured Unsaturated Rock on Transient Infiltration Pulses, LBNL-57539, 5:1129-1142 . · Yu-Shu Wu, S. Mukhopadhyay, K. Zhang*, and G. S. Bodvarsson, 2006, A Mountain

Ajo-Franklin, Jonathan

183

Seismicity in the Vicinity of Yucca Mountain, Nevada, for the Period October 1, 2003 to September 30, 2004  

SciTech Connect (OSTI)

This report describes the seismicity and earthquake monitoring activities within the Yucca Mountain region during fiscal year 2004 (FY2004 - October 1, 2003, through September 30, 2004) based on operation of the Southern Great Basin Digital Seismic Network (SGBDSN). Network practices and earthquake monitoring conducted at the Nevada Seismological Laboratory (NSL) under DOE directives for prior fiscal years are covered in similar yearly reports (see references). Real-time systems, including regional data telemetry and data management at NSL, provide for the automatic determination of earthquake locations and magnitudes and notification of important earthquakes in the region to UNR staff and DOE management. All waveform and meta-data, including automatic locations, phase arrival information, and analyst reviewed information, are managed through a relational database system allowing quick and reliable evaluation and analysis of ongoing earthquake activity near Yucca Mountain. This network, which contains weak-motion and strong-motion instrumentation, addresses the seismic hazard of the Yucca Mountain area by providing accurate earthquake magnitudes for earthquake recurrence estimates, spatial hypocentral control to very low magnitudes for identifying and assessing active faults and verifying tectonic models, true ground motions over the complete range of expected earthquake amplitudes for developing predictive models, and earthquake source information for characterizing active faulting. The Nevada Seismological Laboratory operated a 30-station monitoring network within a ring of approximately 50 km radius around Yucca Mountain during FY2004. This year showed the second-lowest seismic moment rate in the NTS and Yucca Mountain region for any fiscal year reporting period since prior to the 1992 M 5.6 Little Skull Mountain (LSM) earthquake. A total of 2180 earthquakes were located for FY2004. The largest event during FY2004 was M 2.99 and there were only 12 earthquakes greater than M 2.00. This is the second year since the LSM event that no M ? 3.00 earthquake was recorded within 65 km of Yucca Mountain. (FY2003 was the first.) For FY2004, focal mechanisms were developed for 24 earthquakes. These focal mechanisms show predominantly strike-slip motion with a tension axis oriented WNW-ESE. Four earthquakes in FY2004 were within 10 km of Yucca Mountain, all having M < 0. A total of 31 earthquakes have occurred in this immediate zone around Yucca Mountain since the digital network operations started in October 1995. Activity in the Death Valley area was monitored by several analog stations still maintained in conjunction with the Yucca Mountain monitoring. There is continuing aftershock activity in the zone of the 1993 M 6.1 Eureka Valley and 1999 M 5.6 Scotty’s Junction earthquakes. Overall, the seismicity level of the Death Valley area is significantly greater than that in the vicinity of Yucca Mountain.

von Seggern, David; Smith, Ken

2007-10-15T23:59:59.000Z

184

Use of thermal data to estimate infiltration, Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Temperature and pressure monitoring in a vertical borehole in Pagany Wash, Yucca Mountain, Nevada, measured disruptions of the natural gradients associated with the February, 1998, El Nino precipitation events. The temperature and pressure disruptions indicated infiltration and percolation through the 12.1 m of Pagany Wash alluvium and deep percolation to greater than 35.2 m into the Yucca Mountain Tuff.

LeCain, Gary D.; Kurzmack, Mark

2001-04-29T23:59:59.000Z

185

www.vadosezonejournal.org Vol. 8, No. 2, May 2009 510 Y M is being studied extensively to deter-  

E-Print Network [OSTI]

surrounding Yucca Mountain (Robinson and Bussod, 2000). Experiments have been performed at the pro- posed to access within Yucca Mountain (Bechtel SAIC Company, 2004a,b). The Busted Butte Unsaturated Zone Transport Test Site, approxi- mately 160 km northwest of Las Vegas, NV, and 8 km southeast of Yucca Mountain

Gable, Carl W.

186

Laboratory measurement of water imbibition into low-permeability welded tuff  

E-Print Network [OSTI]

processes in flow and trans- port through the unsaturated zone at Yucca Mountain, Nevada, the only site at Yucca Mountain. The rate of imbibition is determined by the product of a driving force and conductivity formation at Yucca Moun- tain by mercury porosimetery and found average pore diameters (weighted

Hu, Qinhong "Max"

187

Reno, NV, 1976). 38. M. C. Reheis and R. Kihl, J. Geophys. Res. 100,  

E-Print Network [OSTI]

of the Yucca Mountain Unsaturated and Sat- urated Zone Hydrology to Climate Change, 1996 Milestone report 3GCA102M (U.S. Geological Sur- vey­Yucca Mountain Project Branch, Las Vegas, NV, 1997). 42. J. M. Barnola National Laboratory. Part of this work was supported and managed by DOE's Yucca Mountain Site

188

DOE Announces Yucca Mountain License Application Schedule | Department of  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain License Application Schedule Yucca Mountain License Application Schedule DOE Announces Yucca Mountain License Application Schedule July 19, 2006 - 3:13pm Addthis New Director Ward Sproat Testifies on Revised Timeline WASHINGTON, DC - The Department of Energy (DOE) today announced that it will submit a license application to the Nuclear Regulatory Commission (NRC) for a nuclear waste repository at Yucca Mountain, Nevada, no later than June 30, 2008. The Department also announced that if requested legislative changes are enacted, the repository will be able to accept spent nuclear fuel and high-level waste starting in early 2017. Announcing a schedule for submitting a license application is another step in the Department's mission to provide stability, clarity and predictability in moving the Yucca Mountain Project forward as quickly as

189

Department of Energy Files Motion to Withdraw Yucca Mountain License  

Broader source: Energy.gov (indexed) [DOE]

Files Motion to Withdraw Yucca Mountain Files Motion to Withdraw Yucca Mountain License Application Department of Energy Files Motion to Withdraw Yucca Mountain License Application March 3, 2010 - 12:00am Addthis WASHINGTON, D.C. - The U.S. Department of Energy today filed a motion with the Nuclear Regulatory Commission to withdraw the license application for a high-level nuclear waste repository at Yucca Mountain with prejudice. "President Obama is fully committed to ensuring that the Nation meets our long-term storage obligations for nuclear waste," said Department of Energy General Counsel Scott Blake Harris. "In light of the decision not to proceed with the Yucca Mountain nuclear waste repository, the President directed Secretary Chu to establish the Blue Ribbon Commission on America's

190

Yucca Mountain Science and Engineering Report | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain Science and Engineering Report Yucca Mountain Science and Engineering Report Yucca Mountain Science and Engineering Report Yucca Mountain Science and Engineering Report describes the results of scientific and engineering studies of the Yucca Mountain site, the waste forms to be disposed, the repository and waste package designs, and the results of the most recent assessments of the long-term performance of the potential repository. The scientific investigations include site characterization studies of the geologic, hydrologic, and geochemical environment, and evaluation of how conditions might evolve over time. These analyses considered a range of processes that would operate in and around the potential repository. Since projections of performance for 10,000 years are inherently uncertain, the uncertainties associated with analyses and

191

List of Yucca Mountain Archival Documents | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

List of Yucca Mountain Archival Documents List of Yucca Mountain Archival Documents List of Yucca Mountain Archival Documents March 10, 2004 EIS-0250-SA-01: Supplement Analysis Geologic Repository for the Disposal of Spent Nuclear and High-Level Radioactive Waste at Yucca Mountain, Nye County, Nevada March 1, 2004 Nuclear Waste Policy Act Document on the Nuclear Waste Policy Act of 1982 An Act to provide for the development of repositories for the disposal of high-level radioactive waste and spent nuclear fuel, to establish a program of research, development, and demonstration regarding the disposal of high-level radioactive waste and spent nuclear fuel, and for other purposes. April 1, 2003 Final Report of theIgneous Consequences Peer Review Panel A report for the DOE on the Yucca Mountain Project.

192

DOE Defends Its Motion to Withdraw Yucca Mountain Application | Department  

Broader source: Energy.gov (indexed) [DOE]

Defends Its Motion to Withdraw Yucca Mountain Application Defends Its Motion to Withdraw Yucca Mountain Application DOE Defends Its Motion to Withdraw Yucca Mountain Application May 27, 2010 - 2:22pm Addthis Today, the United States Department of Energy filed with the NRC's Atomic Safety and Licensing Board a reply brief making clear that its motion to withdraw the pending application to license the Yucca Mountain geologic repository is authorized by the Atomic Energy Act (AEA) and consistent with the Nuclear Waste Policy Act (NWPA). As today's filing details, the AEA vests the Department with broad authority over the disposal of spent nuclear fuel and high-level radioactive waste. The NWPA does not strip the Department of that authority or otherwise compel the Department to go forward with the construction of the Yucca Mountain repository. Rather, the

193

Two Independent Assessments Find the Department of Energy's Yucca Mountain  

Broader source: Energy.gov (indexed) [DOE]

Two Independent Assessments Find the Department of Energy's Yucca Two Independent Assessments Find the Department of Energy's Yucca Mountain Project is on Track Two Independent Assessments Find the Department of Energy's Yucca Mountain Project is on Track December 13, 2007 - 4:44pm Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) Director of the Office of Civilian Radioactive Waste Management (OCRWM) today released two independent assessments addressing areas critical to the overall success of the Yucca Mountain repository program. These assessments, which include an independent review of the OCRWM Quality Assurance (QA) Program and an independent review of its engineering processes and procedures, have concluded that the Yucca Mountain Project's current QA and engineering processes and procedures are consistent with standard nuclear industry

194

List of Yucca Mountain Archival Documents | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

List of Yucca Mountain Archival Documents List of Yucca Mountain Archival Documents List of Yucca Mountain Archival Documents March 3, 2010 Motion to Withdraw from Yucca Mountain application DOE's withdraws it's pending license application for a permanent geologic repository at Yucca Mountain, Nevada. December 30, 2008 Office of Civilian Radioactive Waste Management-Quality Assurance Requirements and Description A report detailling the requirements and description of the Quality Assurance program. December 9, 2008 The Report To The President And The Congress By The Secretary Of Energy On The Need For A Second Repository This report is prepared pursuant to Section 161 of the Nuclear Waste Policy Act of 1982, which requires the Secretary of Energy to report to the President and to the Congress on or after January 1, 2007, but not later

195

DOE Marks Milestone in Submitting Yucca Mountain License Application |  

Broader source: Energy.gov (indexed) [DOE]

Marks Milestone in Submitting Yucca Mountain License Marks Milestone in Submitting Yucca Mountain License Application DOE Marks Milestone in Submitting Yucca Mountain License Application June 3, 2008 - 12:51pm Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) today announced submittal of a license application (LA) to the U.S. Nuclear Regulatory Commission (NRC) seeking authorization to construct America's first repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. The 8,600 page application describes DOE's plan to safely isolate spent nuclear fuel and high-level radioactive waste in tunnels deep underground at Yucca Mountain, a remote ridge on federally controlled land in the Mojave Desert 90 miles northwest of Las Vegas. Currently, the waste is stored at 121 temporary locations in 39 states

196

Two Independent Assessments Find the Department of Energy's Yucca Mountain  

Broader source: Energy.gov (indexed) [DOE]

Independent Assessments Find the Department of Energy's Yucca Independent Assessments Find the Department of Energy's Yucca Mountain Project is on Track Two Independent Assessments Find the Department of Energy's Yucca Mountain Project is on Track December 13, 2007 - 4:44pm Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) Director of the Office of Civilian Radioactive Waste Management (OCRWM) today released two independent assessments addressing areas critical to the overall success of the Yucca Mountain repository program. These assessments, which include an independent review of the OCRWM Quality Assurance (QA) Program and an independent review of its engineering processes and procedures, have concluded that the Yucca Mountain Project's current QA and engineering processes and procedures are consistent with standard nuclear industry

197

Yucca Mountain Science and Engineering Report | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain Science and Engineering Report Yucca Mountain Science and Engineering Report Yucca Mountain Science and Engineering Report Yucca Mountain Science and Engineering Report describes the results of scientific and engineering studies of the Yucca Mountain site, the waste forms to be disposed, the repository and waste package designs, and the results of the most recent assessments of the long-term performance of the potential repository. The scientific investigations include site characterization studies of the geologic, hydrologic, and geochemical environment, and evaluation of how conditions might evolve over time. These analyses considered a range of processes that would operate in and around the potential repository. Since projections of performance for 10,000 years are inherently uncertain, the uncertainties associated with analyses and

198

DOE Defends Its Motion to Withdraw Yucca Mountain Application | Department  

Broader source: Energy.gov (indexed) [DOE]

Its Motion to Withdraw Yucca Mountain Application Its Motion to Withdraw Yucca Mountain Application DOE Defends Its Motion to Withdraw Yucca Mountain Application May 27, 2010 - 2:22pm Addthis Today, the United States Department of Energy filed with the NRC's Atomic Safety and Licensing Board a reply brief making clear that its motion to withdraw the pending application to license the Yucca Mountain geologic repository is authorized by the Atomic Energy Act (AEA) and consistent with the Nuclear Waste Policy Act (NWPA). As today's filing details, the AEA vests the Department with broad authority over the disposal of spent nuclear fuel and high-level radioactive waste. The NWPA does not strip the Department of that authority or otherwise compel the Department to go forward with the construction of the Yucca Mountain repository. Rather, the

199

Evaluating the Moisture Conditions in the Fractured Rock at Yucca Mountain: The Impact of Natural Convection Processes in Heated Emplacement Drifts  

E-Print Network [OSTI]

THE FRACTURED ROCK AT YUCCA MOUNTAIN: THE IMPACT OF NATURALgeologic repository at Yucca Mountain, Nevada, will stronglyWaste Emplacement Drifts at Yucca Mountain, Nevada, Nuclear

Birkholzer, J.T.; Webb, S.W.; Halecky, N.; Peterson, P.F.; Bodvarsson, G.S.

2005-01-01T23:59:59.000Z

200

Response to "Analysis of the Treatment, by the U.S. Department of Energy, of the FEP Hydrothermal Activity in the Yucca Mountain Performance Assessment" by Yuri Dublyansky  

E-Print Network [OSTI]

Mineral Formation at Yucca Mountain, Nevada. ” Geochimica etand Heat Flow Near Yucca Mountain, Nevada: Some Tectonic andNuclear Waste Site, Yucca Mountain, Nevada, USA: Pedogenic,

Houseworth, J.E.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Modeling of coupled heat transfer and reactive transport processes in porous media: Application to seepage studies at Yucca Mountain, Nevad a  

E-Print Network [OSTI]

Fractured Rock of Yucca Mountain, Nevada: Heterogeneity andfractured rocks of Yucca Mountain have been extensivelyHydrothermal Flow at Yucca Mountain, Part I: Modeling and

Mukhopadhyay, S.; Sonnenthal, E.L.; Spycher, N.

2008-01-01T23:59:59.000Z

202

Determination of Transport Properties From Flowing Fluid Temperature LoggingIn Unsaturated Fractured Rocks: Theory And Semi-Analytical Solution  

SciTech Connect (OSTI)

Flowing fluid temperature logging (FFTL) has been recently proposed as a method to locate flowing fractures. We argue that FFTL, backed up by data from high-precision distributed temperature sensors, can be a useful tool in locating flowing fractures and in estimating the transport properties of unsaturated fractured rocks. We have developed the theoretical background needed to analyze data from FFTL. In this paper, we present a simplified conceptualization of FFTL in unsaturated fractured rock, and develop a semianalytical solution for spatial and temporal variations of pressure and temperature inside a borehole in response to an applied perturbation (pumping of air from the borehole). We compare the semi-analytical solution with predictions from the TOUGH2 numerical simulator. Based on the semi-analytical solution, we propose a method to estimate the permeability of the fracture continuum surrounding the borehole. Using this proposed method, we estimated the effective fracture continuum permeability of the unsaturated rock hosting the Drift Scale Test (DST) at Yucca Mountain, Nevada. Our estimate compares well with previous independent estimates for fracture permeability of the DST host rock. The conceptual model of FFTL presented in this paper is based on the assumptions of single-phase flow, convection-only heat transfer, and negligible change in system state of the rock formation. In a sequel paper [Mukhopadhyay et al., 2008], we extend the conceptual model to evaluate some of these assumptions. We also perform inverse modeling of FFTL data to estimate, in addition to permeability, other transport parameters (such as porosity and thermal conductivity) of unsaturated fractured rocks.

Mukhopadhyay, Sumit; Tsang, Yvonne W.

2008-08-01T23:59:59.000Z

203

Review of Yucca Mountain Disposal Criticality Studies  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE), Office of Civilian Radioactive Waste Management, submitted a license application for construction authorization of a deep geologic repository at Yucca Mountain, Nevada, in June of 2008. The license application is currently under review by the U.S. Nuclear Regulatory Commission. However,on March 3, 2010 the DOE filed a motion requesting withdrawal of the license application. With the withdrawal request and the development of the Blue Ribbon Commission to seek alternative strategies for disposing of spent fuel, the status of the proposed repository at Yucca Mountain is uncertain. What is certain is that spent nuclear fuel (SNF) will continue to be generated and some long-lived components of the SNF will eventually need a disposition path(s). Strategies for the back end of the fuel cycle will continue to be developed and need to include the insights from the experience gained during the development of the Yucca Mountain license application. Detailed studies were performed and considerable progress was made in many key areas in terms of increased understanding of relevant phenomena and issues regarding geologic disposal of SNF. This paper reviews selected technical studies performed in support of the disposal criticality analysis licensing basis and the use of burnup credit. Topics include assembly misload analysis, isotopic and criticality validation, commercial reactor critical analyses, loading curves, alternative waste package and criticality control studies, radial burnup data and effects, and implementation of a conservative application model in the criticality probabilistic evaluation as well as other information that is applicable to operations regarding spent fuel outside the reactor. This paper summarizes the work and significant accomplishments in these areas and provides a resource for future, related activities.

Scaglione, John M [ORNL] [ORNL; Wagner, John C [ORNL] [ORNL

2011-01-01T23:59:59.000Z

204

Total system performance assessment - 1995: An evaluation of the potential Yucca Mountain Repository  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) is currently investigating the feasibility of permanently disposing the nation`s commercial high-level radioactive wastes (in the form of spent fuel from the over 100 electric power-generating nuclear reactors across the U.S.) and a portion of the defense high-level radioactive wastes (currently stored at federal facilities around the country) in the unsaturated tuffaceous rocks at Yucca Mountain, Nevada. Quantitative predictions based on the most current understanding of the processes and parameters potentially affecting the long-term behavior of the disposal system are used to assess the ability of the site and its associated engineered designs to meet regulatory objectives set forward by the U.S. Nuclear Regulatory Commission (NRC) and the U.S. Environmental Protection Agency (EPA). The evaluation of the ability of the overall system to meet the performance objectives specified in the applicable regulatory standards has been termed total system performance assessment (TSPA). The aim of any total system performance assessment is to be as complete and reasonably conservative as possible and to assure that the descriptions of the predictive models and parameters are sufficient to ascertain their accuracy. Total system performance assessments evolve with time. As additional site and design information is generated, performance assessment analyses can be revised to become more representative of the expected conditions and remove some of the conservative assumptions necessitated by the incompleteness of site and design data. Previous iterations of total system performance assessment of the Yucca Mountain site and associated engineered barriers have been conducted in 1991 and 1993. These analyses have been documented in Barnard, Eslinger, Wilson and Andrews.

NONE

1995-11-01T23:59:59.000Z

205

Total system performance assessment - 1995: An evaluation of the potential Yucca Mountain repository  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) is currently investigating the feasibility of permanently disposing the nation`s commercial high-level radioactive wastes (in the form of spent fuel from the over 100 electric power-generating nuclear reactors across the U.S.) and a portion of the defense high-level radioactive wastes (currently stored at federal facilities around the country) in the unsaturated tuffaceous rocks at Yucca Mountain, Nevada. Quantitative predictions based on the most current understanding of the processes and parameters potentially affecting the long-term behavior of the disposal system are used to assess the ability of the site and its associated engineered designs to meet regulatory objectives of the US NRC and the US EPA. The evaluation of the ability of the overall system to meet the performance objectives specified in the applicable regulatory standards has been termed total system performance assessment (TSPA). Total system performance assessments require the explicit quantification of the relevant processes and process interactions. In addition assessments are useful to help define the most significant processes, the information gaps and uncertainties and therefore the additional information required for more robust and defensible assessment of the overall performance. The aim of any total system performance assessment is to be as complete and reasonably conservative as possible and to assure that the descriptions of the predictive models and parameters are sufficient to ascertain their accuracy. Total system performance assessments evolve with time. Previous iterations of total system performance assessment of the Yucca Mountain site and associated engineered barriers have been conducted in 1991 and 1993.

Atkins, J.E.; Lee, J.H.; Lingineni, S.; Mishra, S; McNeish, J.A.; Sassani, D.C.; Sevougian, S.D.

1995-11-01T23:59:59.000Z

206

Yucca Mountain Site Characterization Project Plan  

SciTech Connect (OSTI)

The purpose of this document is to describe the Yucca Mountain Site Characterization Project (YMP) and establish an approved YMP baseline against which overall YMP progress and management effectiveness shall be measured. For the sake of brevity, this document will be referred to as the Project Plan throughout this document. This Project Plan only addresses activities up to the submittal of the repository license application (LA) to the Nuclear Regulatory Commission (NRC). A new Project Plan will be submitted to establish the technical, cost, and schedule baselines for the final design and construction phase of development extending through the start of repository operations, assuming that the site is determined to be suitable.

Gertz, C.P.; Bartlett, J.

1992-01-01T23:59:59.000Z

207

Yucca MountainTransportation: Private Sector Perspective  

Broader source: Energy.gov (indexed) [DOE]

Transportation: Transportation: Private Sector "Lessons Learned" US Transport Council David Blee Executive Director dblee@ustransportcouncil.org DOE Transportation External Coordination (TEC) Working Group April 4, 2005 Phoenix, Arizona US Transport Council -- DOE TEC 4/4/05 2 US Transport Council Formed in 2002 during the Yucca Mountain Ratification debate to provide factual information on nuclear materials transportation, experience, safety & emergency planning Comprised of 24 member companies from the transport sector including suppliers and customers Principal focus is transport education, policy and business commerce related to nuclear materials transport US Transport Council -- DOE TEC 4/4/05 3 USTC Members AREVA BNFL, Inc Burns & Roe Cameco

208

Yucca Mountain Climate Technical Support Representative  

SciTech Connect (OSTI)

The primary objective of Project Activity ORD-FY04-012, “Yucca Mountain Climate Technical Support Representative,” was to provide the Office of Civilian Radioactive Waste Management (OCRWM) with expertise on past, present, and future climate scenarios and to support the technical elements of the Yucca Mountain Project (YMP) climate program. The Climate Technical Support Representative was to explain, defend, and interpret the YMP climate program to the various audiences during Site Recommendation and License Application. This technical support representative was to support DOE management in the preparation and review of documents, and to participate in comment response for the Final Environmental Impact Statement, the Site Recommendation Hearings, the NRC Sufficiency Comments, and other forums as designated by DOE management. Because the activity was terminated 12 months early and experience a 27% reduction in budget, it was not possible to complete all components of the tasks as originally envisioned. Activities not completed include the qualification of climate datasets and the production of a qualified technical report. The following final report is an unqualified summary of the activities that were completed given the reduced time and funding.

Sharpe, Saxon E

2007-10-23T23:59:59.000Z

209

TBM tunneling on the Yucca Mountain Project  

SciTech Connect (OSTI)

The US Department of Energy`s (DOE) Yucca Mountain Project (YMP) is a scientific endeavor to determine the suitability of Yucca Mountain for the first long-term, high-level nuclear waste repository in the United States. The current status of this long-term project from the construction perspective is described. A key element is construction of the Exploratory Studies Facility (ESF) Tunnel, which is being excavated with a 7.6 m (25 ft) diameter tunnel boring machine (TBM). Development of the ESF may include the excavation of over 15 km (9.3 mi) of tunnel varying in size from 3.0 to 7.6 m (10 to 25 ft). Prior to construction, extensive constructability reviews were an interactive part of the final design. The intent was to establish a constructable design that met the long-term stability requirements for radiological safety of a future repository, while maintaining flexibility for the scientific investigations and acceptable tunneling productivity.

Morris, J.P.; Hansmire, W.H. [Kiewit Construction Co., Las Vegas, NV (United States)]|[Parsons, Brinckerhoff, Quade and Douglas, Inc., Las Vegas, NV (United States)

1995-03-01T23:59:59.000Z

210

The Sorption/Desorption Behavior of Uranium in Transport Studies Using Yucca Mountain Alluvium  

SciTech Connect (OSTI)

Yucca Mountain, Nevada is the proposed site of a geologic repository for the disposal of spent nuclear fuel and high-level radioactive waste in the United States. In the event repository engineered barriers fail, the saturated alluvium located south of Yucca Mountain is expected to serve as a natural barrier to the migration of radionuclides to the accessible environment. The purpose of this study is to improve the characterization of uranium retardation in the saturated zone at Yucca Mountain to support refinement of an assessment model. The distribution of uranium desorption rates from alluvium obtained from Nye County bore holes EWDP-19IM1, EWDP-10SA, EWDP-22SA were studied to address inconsistencies between results from batch sorption and column transport experiments. The alluvium and groundwater were characterized to better understand the underlying mechanisms of the observed behavior. Desorption rate constants were obtained using an activity based mass balance equation and column desorption experiments were analyzed using a mathematical model utilizing multiple sorption sites with different first-order forward and reverse reaction rates. The uranium desorption rate constants decreased over time, suggesting that the alluvium has multiple types of active sorption sites with different affinities for uranium. While a significant fraction of the initially sorbed uranium desorbed from the alluvium quite rapidly, a roughly equivalent amount remained sorbed after several months of testing. The information obtained through this research suggests that uranium may experience greater effective retardation in the alluvium than simple batch sorption experiments would suggest. Electron Probe Microanalysis shows that uranium is associated with both clay minerals and iron oxides after sorption to alluvial material. These results provide further evidence that the alluvium contains multiple sorption sites for uranium.

C. D. Scism

2006-02-15T23:59:59.000Z

211

Factors limiting microbial growth and activity at a proposed high-level nuclear repository, yucca mountain, nevada.  

Science Journals Connector (OSTI)

...High-Level Nuclear Repository, Yucca Mountain, Nevada TL Kieft WP Kovacik Jr...part of the characterization of Yucca Mountain, Nev., as a potential repository...from nine sites along a tunnel in Yucca Mountain. Microbial abundance was generally...

T L Kieft; W P Kovacik; D B Ringelberg; D C White; D L Haldeman; P S Amy; L E Hersman

1997-08-01T23:59:59.000Z

212

Evaluating Flake Assemblage and Stone Tool Distributions at a Large Western Stemmed Tradition Site Near Yucca Mountain, Nevada  

E-Print Network [OSTI]

investigations at Yucca Mountain for the U. S. Department ofTRADITION SITE NEAR YUCCA MOUNTAIN lo: Special PublicationsLithic Quarry Near Yucca Mountain, Nye Coimty, Nevada. Las

Haynes, Gregory M

1996-01-01T23:59:59.000Z

213

Coupled Analysis of Change in Fracture Permeability during the Cooling Phase of the Yucca Mountain Drift Scale Test  

E-Print Network [OSTI]

mechanical analysis of the Yucca Mountain Drift Scale Test –scale heater test at Yucca Mountain, Nevada, USA. In.t J.and Cooling at the Yucca Mountain Drift Scale Test. In.t J.

Rutqvist, J.

2008-01-01T23:59:59.000Z

214

Oxidative dehydrogenation of alkanes to unsaturated hydrocarbons  

DOE Patents [OSTI]

Oxidative dehydrogenation of alkanes to unsaturated hydrocarbons is carried out over metal vanadate catalysts under oxidizing conditions. The vanadate catalysts are represented by the formulas M[sub 3](VO[sub 4])[sub 2] and MV[sub 2]O[sub 6], M representing Mg, Zn, Ca, Pb, or Cd. The reaction is carried out in the presence of oxygen, but the formation of oxygenate by-products is suppressed.

Kung, H.H.; Chaar, M.A.

1988-10-11T23:59:59.000Z

215

Technical Report Confirms Reliability of Yucca Mountain Technical Work |  

Broader source: Energy.gov (indexed) [DOE]

Technical Report Confirms Reliability of Yucca Mountain Technical Technical Report Confirms Reliability of Yucca Mountain Technical Work Technical Report Confirms Reliability of Yucca Mountain Technical Work February 17, 2006 - 11:59am Addthis WASHINGTON, DC - The Department of Energy's Office of Civilian Radioactive Waste Management (OCRWM) today released a report confirming the technical soundness of infiltration modeling work performed by U.S. Geological Survey (USGS) employees. "The report makes clear that the technical basis developed by the USGS has a strong conceptual foundation and is corroborated by independently-derived scientific conclusions, and provides a solid underpinning for the 2002 site recommendation," said OCRWM's Acting Director Paul Golan. "We are committed to opening Yucca Mountain based only on sound science. The work

216

SATURATED ZONE IN-SITU TESTING  

SciTech Connect (OSTI)

The purpose of this scientific analysis is to document the results and interpretations of field experiments that test and validate conceptual flow and radionuclide transport models in the saturated zone (SZ) near Yucca Mountain, Nevada. The test interpretations provide estimates of flow and transport parameters used in the development of parameter distributions for total system performance assessment (TSPA) calculations. These parameter distributions are documented in ''Site-Scale Saturated Zone Flow Model (BSC 2004 [DIRS 170037]), Site-Scale Saturated Zone Transport'' (BSC 2004 [DIRS 170036]), Saturated Zone Colloid Transport (BSC 2004 [DIRS 170006]), and ''Saturated Zone Flow and Transport Model Abstraction'' (BSC 2004 [DIRS 170042]). Specifically, this scientific analysis contributes the following to the assessment of the capability of the SZ to serve as part of a natural barrier for waste isolation for the Yucca Mountain repository system: (1) The bases for selection of conceptual flow and transport models in the saturated volcanics and the saturated alluvium located near Yucca Mountain. (2) Results and interpretations of hydraulic and tracer tests conducted in saturated fractured volcanics at the C-wells complex near Yucca Mountain. The test interpretations include estimates of hydraulic conductivities, anisotropy in hydraulic conductivity, storativities, total porosities, effective porosities, longitudinal dispersivities, matrix diffusion mass transfer coefficients, matrix diffusion coefficients, fracture apertures, and colloid transport parameters. (3) Results and interpretations of hydraulic and tracer tests conducted in saturated alluvium at the Alluvial Testing Complex (ATC) located at the southwestern corner of the Nevada Test Site (NTS). The test interpretations include estimates of hydraulic conductivities, storativities, total porosities, effective porosities, longitudinal dispersivities, matrix diffusion mass transfer coefficients, and colloid transport parameters. (4) Comparisons of sorption parameter estimates for a reactive solute tracer (lithium ion) derived from the C-wells field tracer tests and laboratory tests using C-wells core samples. (5) Sorption parameter estimates for lithium ion derived from laboratory tests using alluvium samples from ATC well NC-EWDP-19D. These estimates will allow a comparison of laboratory- and field-derived sorption parameters to be made in saturated alluvium if cross-hole tracer tests are conducted at the ATC.

P.W. REIMUS

2004-11-08T23:59:59.000Z

217

Testimony of Greg Friedman Yucca Mountain  

Broader source: Energy.gov (indexed) [DOE]

Environment and the Economy Environment and the Economy of the Committee on Energy and Commerce U.S. House of Representatives FOR RELEASE ON DELIVERY 1:00 PM Wednesday, June 1, 2011 1 Mr. Chairman and members of the Subcommittee, I am pleased to be here at your request to testify on matters relating to the Department of Energy's Yucca Mountain Project. As you know, issues surrounding the termination of the Project have been widely publicized. They directly impact the Department's responsibilities to manage legacy waste generated from nuclear weapons production and to accept and dispose of spent nuclear fuel emanating from commercial nuclear reactors. The United States has invested nearly 30 years of effort and expended over $15 billion to

218

Applied Field Research Initiative Deep Vadose Zone  

Broader source: Energy.gov (indexed) [DOE]

Applied Field Research Initiative Applied Field Research Initiative Deep Vadose Zone Located on the Hanford Site in Richland, Washington, the Deep Vadose Zone Applied Field Research Initiative (DVZ AFRI) was established to protect water resources by addressing the challenge of preventing contamination in the deep vadose zone from reaching groundwater. Led by the Pacific Northwest National Laboratory, the Initiative is a collaborative effort that leverages Department of Energy (DOE) investments in basic science and applied research and the work of site contractors to address the complex deep vadose zone contamination challenges. Challenge Many vadose zone environments within the DOE complex consist of complex stratified layers of unconsolidated and water-unsaturated sediments that are, in many places, con-

219

Preliminary mapping of surficial geology of Midway Valley Yucca Mountain Project, Nye County, Nevada; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

The tectonics program for the proposed high-level nuclear waste repository at Yucca Mountain in southwestern Nevada must evaluate the potential for surface faulting beneath the prospective surface facilities. To help meet this goal, Quaternary surficial mapping studies and photolineament analyses were conducted to provide data for evaluating the location, recency, and style of faulting with Midway Valley at the eastern base of Yucca Mountain, the preferred location of these surface facilities. This interim report presents the preliminary results of this work.

Wesling, J.R.; Bullard, T.F.; Swan, F.H.; Perman, R.C.; Angell, M.M. [Geomatrix Consultants, Inc., San Francisco, CA (United States); Gibson, J.D. [Sandia National Labs., Albuquerque, NM (United States)

1992-04-01T23:59:59.000Z

220

Infiltration in Unsaturated Layered Fluvial Deposits at Rio Bravo:  

Science Journals Connector (OSTI)

...meetings since 1992. We acknowledge funding from DOEs Environmental Management...fracture network at Fran Ridge, Yucca Mountain, Nevada: A photo essay and data...radioactive and hazardous waste disposal. Ann Arbor Science, Ann Arbor...

R. J. Glass; J. R. Brainard; T.-C. Jim Yeh

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Yucca Mountain - U.S. Department of Energy's Brief in Support...  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain - U.S. Department of Energy's Brief in Support of Review and Reversal of the Board's Ruling on the Motion to Withdraw Yucca Mountain - U.S. Department of Energy's...

222

Multiple-point statistical prediction on fracture networks at Yucca Mountain  

Science Journals Connector (OSTI)

In many underground nuclear waste repository systems, such as Yucca Mountain project, water flow rate and amount of ... fracture data to study flow field behavior at Yucca Mountain waste repository system. First,...

Xiaoyan Liu; Chengyuan Zhang; Quansheng Liu; Jens Birkholzer

2009-05-01T23:59:59.000Z

223

Yucca Mountain - U.S. Department of Energy's Response to the...  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain - U.S. Department of Energy's Response to the Motion for RecusalDisqualification Yucca Mountain - U.S. Department of Energy's Response to the Motion for Recusal...

224

Multiphysics processes in partially saturated fracture rock: Experiments and models from Yucca Mountain  

E-Print Network [OSTI]

in the G-Tunnel underground facility. in Proceedings of theYucca Mountain showing underground facilities for the siteYucca Mountain showing underground facilities for the site

Rutqvist, J.

2014-01-01T23:59:59.000Z

225

Hydraulic and Geochemical Framework of the Idaho National Engineering and Environmental Laboratory Vadose Zone  

Science Journals Connector (OSTI)

...pore waters beneath a mixed waste disposal site in the unsaturated zone. p. 241-247...actinides from a transuranic waste disposal site in the vadose zone. Radiochim...Characterization of plutonium in waters at Maxey Flats, Kentucky and near the Idaho Chemical...

John R. Nimmo; Joseph P. Rousseau; Kim S. Perkins; Kenneth G. Stollenwerk; Pierre D. Glynn; Roy C. Bartholomay; LeRoy L. Knobel

226

Board Oversight of the DOE's Scientific and Technical Activities at Yucca Mountain  

E-Print Network [OSTI]

Chapter 1 Board Oversight of the DOE's Scientific and Technical Activities at Yucca Mountain The DOE is characterizing Yucca Mountain in Nevada to evaluate the suitability of the site for con. In addi- tion, individual Board members attended DOE workshops and traveled to Yucca Mountain. I

227

Nuclear Waste Technical Review Board Thermal-Response Evaluation of Yucca Mountain  

E-Print Network [OSTI]

Nuclear Waste Technical Review Board Thermal-Response Evaluation of Yucca Mountain During the Preclosure and Postclosure Phases July 2008 #12;Thermal Response Evaluation of Yucca Mountain July 2008 Page of the thermal response of the proposed Yucca Mountain repository for various thermal loadings. The U. S. Nuclear

228

Testing for fault activity at Yucca Mountain, Nevada, using independent GPS results from the BARGEN network  

E-Print Network [OSTI]

Testing for fault activity at Yucca Mountain, Nevada, using independent GPS results from the BARGEN June 2006; published 19 July 2006. [1] Data from BARGEN GPS stations around Yucca Mountain (YM) have at Yucca Mountain, Nevada, using independent GPS results from the BARGEN network, Geophys. Res. Lett., 33

Blewitt, Geoffrey

229

Late Quaternary geomorphology and soils in Crater Flat, Yucca Mountain area, southern Nevada  

E-Print Network [OSTI]

Late Quaternary geomorphology and soils in Crater Flat, Yucca Mountain area, southern Nevada for a Crater Flat cation-leaching curve. This curve differs somewhat from a previous Yucca Mountain curve­10 from a previous ``surficial deposits'' stratigraphy used in the Yucca Mountain area. Although

Dorn, Ron

230

Dynamic rupture through a branched fault2 configuration at Yucca Mountain and resulting3  

E-Print Network [OSTI]

Dynamic rupture through a branched fault2 configuration at Yucca Mountain and resulting3 ground analyses. This is motivated by the normal faults in the vicinity10 of Yucca Mountain, NV, a potential site fault12 located approximately 1 km west of the crest of Yucca Mountain, is the13 most active

Dmowska, Renata

231

Sensitivity Study of Physical Limits on Ground Motion at Yucca Mountain  

E-Print Network [OSTI]

Sensitivity Study of Physical Limits on Ground Motion at Yucca Mountain by Benchun Duan and Steven at Yucca Mountain, Nevada, and assess sensitivities due to uncertainties in fault geometry, off-fault rock ground-motion parameters (e.g., Bommer, 2002; Bommer et al., 2004). The 1998 PSHA for Yucca Mountain

Duan, Benchun

232

Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground Motions  

E-Print Network [OSTI]

Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground of Yucca Mountain, Nevada, a potential site for a high-level radioactive waste repository. The Solitario km away from the SCF beneath the crest of Yucca Mountain, causing the repository site to experience

233

Surface-to-tunnel seismic tomography studies at Yucca Mountain, Nevada  

E-Print Network [OSTI]

Surface-to-tunnel seismic tomography studies at Yucca Mountain, Nevada Roland Gritto, Valeri A in the proposed nuclear waste repository area at Yucca Mountain, Nevada. A 5-km-long source line and a 3-km-long receiver line were located on top of Yucca Mountain ridge and inside the Exploratory Study Facility (ESF

Korneev, Valeri A.

234

Sensitivity Study of Physical Limits on Ground Motion at Yucca Mountain  

E-Print Network [OSTI]

1 Sensitivity Study of Physical Limits on Ground Motion at Yucca Mountain Benchun Duan1 and Steven investigate physical3 limits at Yucca Mountain, Nevada, and assess sensitivities due to uncertainties in fault (e.g.,28 Bommer, 2002; Bommer et al., 2004).29 The 1998 PSHA for Yucca Mountain, a potential high

Duan, Benchun

235

Effect of viscoelastic postseismic relaxation on estimates of interseismic crustal strain accumulation at Yucca Mountain,  

E-Print Network [OSTI]

of interseismic crustal strain accumulation at Yucca Mountain, Nevada William C. Hammond,1 Corné Kreemer,1 March 2010. [1] We estimate the longterm crustal strain rate at Yucca Mountain (YM), Nevada from GPS crustal strain accumulation at Yucca Mountain, Nevada, Geophys. Res. Lett., 37, L06307, doi:10.1029/2010GL

Tingley, Joseph V.

236

The terrestrial ecosystem program for the Yucca Mountain Project  

SciTech Connect (OSTI)

DOE has implemented a program to monitor and mitigate impacts associated with site Characterization Activities at Yucca Mountain on the environment. This program has a sound experimental and statistical base. Monitoring data has been collected for parts of the program since 1989. There have been numerous changes in the Terrestrial Ecosystems Program since 1989 that reflect changes in the design and locations of Site Characterization Activities. There have also been changes made in the mitigation techniques implemented to protect important environmental resources based on results from the research efforts at Yucca Mountain. These changes have strengthened DOE efforts to ensure protection of the environmental during Site Characterization. DOE,has developed and implemented an integrated environmental program that protects the biotic environment and will restore environmental quality at Yucca Mountain.

Ostler, W.K.; O`Farrell, T.P.

1994-06-01T23:59:59.000Z

237

Yucca Mountain biological resources monitoring program; Annual report FY92  

SciTech Connect (OSTI)

The US Department of Energy (DOE) is required by the Nuclear Waste Policy Act of 1982 (as amended in 1987) to study and characterize Yucca Mountain as a potential site for a geologic repository for high-level nuclear waste. During site characterization, the DOE will conduct a variety of geotechnical, geochemical, geological, and hydrological studies to determine the suitability of Yucca Mountain as a potential repository. To ensure that site characterization activities (SCA) do not adversely affect the environment at Yucca Mountain, an environmental program has been implemented to monitor and mitigate potential impacts and ensure activities comply with applicable environmental regulations. This report describes the activities and accomplishments of EG&G Energy Measurements, Inc. (EG&G/EM) during fiscal year 1992 (FY92) for six program areas within the Terrestrial Ecosystem component of the YMP environmental program. The six program areas are Site Characterization Effects, Desert Tortoises, Habitat Reclamation, Monitoring and Mitigation, Radiological Monitoring, and Biological Support.

NONE

1993-02-01T23:59:59.000Z

238

Yucca Mountain Biological Resources Monitoring Program; Annual report, FY91  

SciTech Connect (OSTI)

The US Department of Energy (DOE) is required by the Nuclear Waste Policy Act of 1982 (as amended in 1987) to study and characterize Yucca Mountain as a possible site for a geologic repository for high-level nuclear waste. During site characterization, the DOE will conduct a variety of geotechnical, geochemical, geological, and hydrological studies to determine the suitability of Yucca Mountain as a repository. To ensure that site characterization activities (SCA) do not adversely affect the Yucca Mountain area, an environmental program has been implemented to monitor and mitigate potential impacts and to ensure that activities comply with applicable environmental regulations. This report describes the activities and accomplishments during fiscal year 1991 (FY91) for six program areas within the Terrestrial Ecosystem component of the YMP environmental program. The six program areas are Site Characterization Activities Effects, Desert Tortoises, Habitat Reclamation, Monitoring and Mitigation, Radiological Monitoring, and Biological Support.

NONE

1992-01-01T23:59:59.000Z

239

The relationship of the Yucca Mountain repository block to the regional ground-water system: A geochemical model  

SciTech Connect (OSTI)

Yucca Mountain, in southern Nevada, is being studied by the Department of Energy and the State of Nevada as the site of a high-level nuclear waste repository. Geochemical and isotopic modeling were used in this study to define the relationship of the volcanic tuff aquifers and aquitards to the underlying regional carbonate ground-water system. The chemical evolution of a ground water as it passes through a hypothetical tuffaceous aquifer was developed using computer models PHREEQE, WATEQDR and BALANCE. The tuffaceous system was divided into five parts, with specific mineralogies, reaction steps and temperatures. The initial solution was an analysis of a soil water from Rainier Mesa. The ending solution in each part became the initial solution in the next part. Minerals consisted of zeolites, smectites, authigenic feldspars and quartz polymorphs from described diagentic mineral zones. Reaction steps were ion exchange with zeolites. The solution from the final zone, Part V, was chosen as most representative, in terms of pH, element molalities and mineral solubilities, of tuffaceous water. This hypothetical volcanic water from Part V was mixed with water from the regional carbonate aquifer, and the results compared to analyses of Yucca Mountain wells. Mixing and modeling attempts were conducted on wells in which studies indicated upward flow.

Matuska, N.A.; Hess, J.W. [Nevada Univ., Reno, NV (United States). Water Resources Center

1989-08-01T23:59:59.000Z

240

The Proposed Yucca Mountain Repository From A Corrosion Perspective  

SciTech Connect (OSTI)

Corrosion is a primary determinant of waste package performance at the proposed Yucca Mountain Repository and will control the delay time for radionuclide transport from the waste package. Corrosion is the most probable and most likely degradation process that will determine when packages will be penetrated and the shape size and distribution of those penetrations. The general issues in corrosion science, materials science and electrochemistry are well defined, and the knowledge base is substantial for understanding corrosion processes. In this paper, the Yucca Mountain Repository is viewed from a corrosion perspective.

J.H. Payer

2005-03-10T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Basaltic volcanic episodes of the Yucca Mountain region  

SciTech Connect (OSTI)

The purpose of this paper is to summarize briefly the distribution and geologic characteristics of basaltic volcanism in the Yucca Mountain region during the last 10--12 Ma. This interval largely postdates the major period of silicic volcanism and coincides with and postdates the timing of major extensional faulting in the region. Field and geochronologic data for the basaltic rocks define two distinct episodes. The patterns in the volume and spatial distribution of these basaltic volcanic episodes in the central and southern part of the SNVF are used as a basis for forecasting potential future volcanic activity in vicinity of Yucca Mountain. 33 refs., 2 figs.

Crowe, B.M.

1990-03-01T23:59:59.000Z

242

United States Environmental Protection Agency | Office of Air and Radiation (6608J) | EPA 402-F-05-028 | October 2005 www.epa.gov/radiation/yucca  

E-Print Network [OSTI]

-028 | October 2005 www.epa.gov/radiation/yucca EPA Yucca Mountain Fact Sheet #4: Agency Roles in the Approval, Monitoring and Operation of a Potential Yucca Mountain Repository Yucca Mountain is the proposed facility for the disposal of spent nuclear fuel and high-level radioactive waste. The Yucca Mountain facility will only

243

Uranium and Neptunium Desorption from Yucca Mountain Alluvium  

SciTech Connect (OSTI)

Uranium and neptunium were used as reactive tracers in long-term laboratory desorption studies using saturated alluvium collected from south of Yucca Mountain, Nevada. The objective of these long-term experiments is to make detailed observations of the desorption behavior of uranium and neptunium to provide Yucca Mountain with technical bases for a more realistic and potentially less conservative approach to predicting the transport of adsorbing radionuclides in the saturated alluvium. This paper describes several long-term desorption experiments using a flow-through experimental method and groundwater and alluvium obtained from boreholes along a potential groundwater flow path from the proposed repository site. In the long term desorption experiments, the percentages of uranium and neptunium sorbed as a function of time after different durations of sorption was determined. In addition, the desorbed activity as a function of time was fit using a multi-site, multi-rate model to demonstrate that different desorption rate constants ranging over several orders of magnitude exist for the desorption of uranium from Yucca Mountain saturated alluvium. This information will be used to support the development of a conceptual model that ultimately results in effective K{sub d} values much larger than those currently in use for predicting radionuclide transport at Yucca Mountain.

C.D. Scism; P.W. Reimus; M. Ding; S.J. Chipera

2006-03-16T23:59:59.000Z

244

Yucca Mountain Project - Argonne National Laboratory annual progress report, FY 1994  

SciTech Connect (OSTI)

This document reports on the work done by the Nuclear Waste Management Section of the Chemical Technology Division (CMT), Argonne National Laboratory, in the period October 1993-September 1994. Studies have been performed to evaluate the performance of nuclear waste glass and spent fuel samples under unsaturated conditions (low volume water contact) that are likely to exist in the Yucca Mountain environment being considered as a potential site for a high-level waste repository. Tests with simulated waste glasses have been in progress for over eight years and demonstrate that actinides from initially fresh glass surfaces will be released as a result of the spallation of reacted glass layers from the surface, as the small volume of water passes over the waste form. Studies are also underway to evaluate the performance of spent fuel samples and unirradiated UO{sub 2} in projected repository conditions. Tests with UO{sub 2} have been ongoing for nine years and show that the oxidation of UO{sub 2} occurs rapidly, and the resulting paragenetic sequence of secondary phases that form on the sample surface is similar to that observed in natural analogues. The reaction of spent fuel samples under conditions similar to those used with UO{sub 2} have been in progress for nearly two years, and the results suggest that spent fuel follows the same reaction progress as UO{sub 2}. The release of individual fission products and transuranic elements was not congruent, with the release being controlled by the formation of small particles or colloids that are suspended in solution and transported away from the waste form. The reaction progress depends on the composition of the spent fuel samples used and, likely, on the composition of the groundwater that contacts the waste form.

Bates, J.K.; Fortner, J.A.; Finn, P.A.; Wronkiewicz, D.J.; Hoh, J.C.; Emery, J.W.; Buck, E.C.; Wolf, S.F.

1995-02-01T23:59:59.000Z

245

Parametric Analyses of Alternative Flow Models at Yucca Mountain, Nevada Calibrations and Controls - State of Nevada-Funded Research  

SciTech Connect (OSTI)

The controls on the potentiometric surface and temperature distribution at Yucca Mountain have long been thought to be related to major fault zones. The exact way the faults influence these distributions has been somewhat elusive. The parametric studies discussed in this paper show that the fault zone x, y and z permeability tensors, as well as the alignment of the fault zone in relation to the flow field (1), are major contributing factors in the pressure and temperature distributions. A series of runs were conducted for the State of Nevada with a 3-dimensional model utilizing the AT2VOC version of the A-TOUGH code (2),(3). The runs were conducted under steady state conditions and utilized fully coupled heat and flow conditions. The model setup and boundary conditions are fully described. Comparisons were done with varying degrees of anisotropic permeability ratios in the fault zones. The resulting temperature and pressure profiles are compared. The model, while simple, allowed us to examine the relationship of the head and temperature distributions to the position and permeability of major fault zones. It is our conclusion that the major faults included in this model do significantly affect the observed head and temperature distributions. Performance Assessments currently may not reflect actual doses at the Compliance boundary due to the potential for radionuclide flow to be captured in the Ghost Dance Fault and be transported primarily south with little dilution and dispersion.

Lehman, L.; Brown, T. P.

2002-02-26T23:59:59.000Z

246

Dialogs on the Yucca Mountain controversy. Special report No. 10  

SciTech Connect (OSTI)

In an attempt to resolve the controversial issue of tectonic and hydrologic stability of the Yucca Mountain region, the National Academy of Sciences established a Panel on Coupled Hydrologic/Tectonic/HydrothermaI Systems. The Panel has recently released it`s findings in a report entitled Ground Water at Yucca Mountain: How High Can It Rise? The representation of data and the scientific validity of this report was the subject of comprehensive evaluations and reviews which has led to correspondence between Dr. Charles Archarnbeau and Dr. Frank Press, the President of the National Academy of Sciences. All such correspondence prior to April 9, 1993 is covered by TRAC Special Report No. 5, {open_quotes}Dialogs on the Yucca Mountain Controversy.{close_quotes} The present report represents a continuation of the dialog between Dr. Archambeau and Dr. Press; specifically the letter from Dr. Press to Dr. Archambeau dated April 9, 1993 and Archambeau`s response to Press, dated August 19, 1993. In addition to the correspondence between Press and Archambeau, a series of recent reports by other investigators, referred to in the correspondence from Archambeau, are included in this report and document new data and inferences of importance for resolution of the question of suitability of the Yucca Mountain site as a high level nuclear waste repository. These reports also demonstrate that other scientists, not previously associated with the government`s program at Yucca Mountain or the National Academy review of an aspect of that program, have arrived at conclusions that are different than those stated by the Academy review and DOE program scientists.

Schluter, C.M.; Szymanski, J.S.

1993-08-01T23:59:59.000Z

247

Unsaturated soil behavior under monotonic and cyclic stress states  

E-Print Network [OSTI]

on triaxial apparatus and helping me on the calibration of equipment. I would like to say thank to Dr. Lianxi Ma for providing me USD testing knowledge and test results. I also would like to thank the Korean students in the Geotechnical Engineering.................. 6 2.1 Soil Suction in Unsaturated Soil....................................................... 6 2.2 Pore Water in Unsaturated Soil and Degrees of Saturation.............. 8 2.3 Soil-Water Characteristic Curve...

Mun, Byoung-Jae

2005-02-17T23:59:59.000Z

248

Coupled thermal-hydrological-mechanical analyses of the Yucca Mountain Drift Scale Test - Comparison of field measurements to predictions of four different numerical models  

E-Print Network [OSTI]

mechanical analyses of the Yucca Mountain Drift Scale Test –Chemical Responses in the Yucca Mountain Drift Scale Test.Heating Phase of the Yucca Mountain Drift Scale Test. In:

2004-01-01T23:59:59.000Z

249

Analysis of Thermally Induced Changes in Fractured Rock Permeability during Eight Years of Heating and Cooling at the Yucca Mountain Drift Scale Test  

E-Print Network [OSTI]

and Cooling at the Yucca Mountain Drift Scale Test J.mechanical analysis of the Yucca Mountain Drift Scale Test –scale heater test at Yucca Mountain, Nevada, USA. Int J Rock

Rutqvist, J.

2008-01-01T23:59:59.000Z

250

Precipitation-Front Modeling: Issues Relating to Nucleation and Metastable Precipitation in the Planned Nuclear Waste Repository at Yucca Mountain, Nevada  

E-Print Network [OSTI]

Mineralogic Model of Yucca Mountain, Nevada, Rev. 1. Reportfor fracture sealing at Yucca Mountain, Nevada. Journal ofWaste Repository at Yucca Mountain, Nevada J.A. Apps and

Apps, J.A.; Sonnenthal, E.L.

2004-01-01T23:59:59.000Z

251

Yucca Mountain - U.S. Department of Energy's Brief in Support of Review and  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain - U.S. Department of Energy's Brief in Support of Yucca Mountain - U.S. Department of Energy's Brief in Support of Review and Reversal of the Board's Ruling on the Motion to Withdraw Yucca Mountain - U.S. Department of Energy's Brief in Support of Review and Reversal of the Board's Ruling on the Motion to Withdraw Proceeding before the Nuclear Regulatory Commission on DOE's application for a license to construct a high-level waste repository at Yucca Mountain, Nevada; DOE brief arguing that the NRC should review and reverse the order of the Atomic Safety and Licensing Board denying DOE's motion to withdraw its application. Yucca Mountain - U.S. Department of Energy's Brief in Support of Review and Reversal of the Board's Ruling on the Motion to Withdraw More Documents & Publications Yucca Mountain - U.S. Department of Energy's Reply to the Responses to the

252

Site-Scale Saturated Zone Flow Model  

SciTech Connect (OSTI)

The purpose of this model report is to document the components of the site-scale saturated-zone flow model at Yucca Mountain, Nevada, in accordance with administrative procedure (AP)-SIII.lOQ, ''Models''. This report provides validation and confidence in the flow model that was developed for site recommendation (SR) and will be used to provide flow fields in support of the Total Systems Performance Assessment (TSPA) for the License Application. The output from this report provides the flow model used in the ''Site-Scale Saturated Zone Transport'', MDL-NBS-HS-000010 Rev 01 (BSC 2003 [162419]). The Site-Scale Saturated Zone Transport model then provides output to the SZ Transport Abstraction Model (BSC 2003 [164870]). In particular, the output from the SZ site-scale flow model is used to simulate the groundwater flow pathways and radionuclide transport to the accessible environment for use in the TSPA calculations. Since the development and calibration of the saturated-zone flow model, more data have been gathered for use in model validation and confidence building, including new water-level data from Nye County wells, single- and multiple-well hydraulic testing data, and new hydrochemistry data. In addition, a new hydrogeologic framework model (HFM), which incorporates Nye County wells lithology, also provides geologic data for corroboration and confidence in the flow model. The intended use of this work is to provide a flow model that generates flow fields to simulate radionuclide transport in saturated porous rock and alluvium under natural or forced gradient flow conditions. The flow model simulations are completed using the three-dimensional (3-D), finite-element, flow, heat, and transport computer code, FEHM Version (V) 2.20 (software tracking number (STN): 10086-2.20-00; LANL 2003 [161725]). Concurrently, process-level transport model and methodology for calculating radionuclide transport in the saturated zone at Yucca Mountain using FEHM V 2.20 are being carried out in the model report, ''Site-Scale Saturated Zone Transport'', MDL-NBS-HS-000010 Rev 01 (BSC 2003 [162419]). The velocity fields are calculated by the flow model, described herein, independent of the transport processes, and are then used as inputs to the transport model. Justification for this abstraction is presented in the model report, ''Saturated Zone Flow and Transport Model Abstraction'', MDL-NBS-HS-000021 (BSC 2003 [164870]).

G. Zyvoloski

2003-12-17T23:59:59.000Z

253

Site characterization of the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste  

Science Journals Connector (OSTI)

Abstract This paper summarizes the investigations conducted to characterize the geologic barrier of the Yucca Mountain disposal system. Site characterization progressed through (1) non-intrusive evaluation and borehole completions to determine stratigraphy for site identification; (2) exploration from the surface through well testing to evaluate the repository feasibility; (3) underground exploration to study coupled processes to evaluate repository suitability; and (4) reporting of experimental conclusions to support the repository compliance phase. Some of the scientific and technical challenges encountered included the evolution from a small preconstruction characterization program with much knowledge to be acquired during construction of the repository to a large characterization program with knowledge acquired prior to submission of the license application for construction authorization in June 2008 (i.e., the evolution from a preconstruction characterization program costing <$0.04×109 as estimated by the Nuclear Regulatory Commission in 1982 to a thorough characterization, design, and analysis program costing $11×109—latter in 2010 constant dollars). Scientific understanding of unsaturated flow in fractures and seepage into an open drift in a thermally perturbed environment was initially lacking, so much site characterization expense was required to develop this knowledge.

Rob P. Rechard; Hui-Hai Liu; Yvonne W. Tsang; Stefan Finsterle

2014-01-01T23:59:59.000Z

254

Nonlinear dynamics in flow through unsaturated fractured-porous media: Status and perspectives  

SciTech Connect (OSTI)

The need has long been recognized to improve predictions of flow and transport in partially saturated heterogeneous soils and fractured rock of the vadose zone for many practical applications, such as remediation of contaminated sites, nuclear waste disposal in geological formations, and climate predictions. Until recently, flow and transport processes in heterogeneous subsurface media with oscillating irregularities were assumed to be random and were not analyzed using methods of nonlinear dynamics. The goals of this paper are to review the theoretical concepts, present the results, and provide perspectives on investigations of flow and transport in unsaturated heterogeneous soils and fractured rock, using the methods of nonlinear dynamics and deterministic chaos. The results of laboratory and field investigations indicate that the nonlinear dynamics of flow and transport processes in unsaturated soils and fractured rocks arise from the dynamic feedback and competition between various nonlinear physical processes along with complex geometry of flow paths. Although direct measurements of variables characterizing the individual flow processes are not technically feasible, their cumulative effect can be characterized by analyzing time series data using the models and methods of nonlinear dynamics and chaos. Identifying flow through soil or rock as a nonlinear dynamical system is important for developing appropriate short- and long-time predictive models, evaluating prediction uncertainty, assessing the spatial distribution of flow characteristics from time series data, and improving chemical transport simulations. Inferring the nature of flow processes through the methods of nonlinear dynamics could become widely used in different areas of the earth sciences.

Faybishenko, Boris

2002-11-27T23:59:59.000Z

255

Trace element and REE composition of five samples of the Yucca Mountain calcite-silica deposits. Special report No. 8  

SciTech Connect (OSTI)

The attached materials document the results of part of a recent effort of geochemical sampling and analysis at Yucca Mountain and nearby regions. The efforts come as a result of interest in comprehensive analyses of rare earth elements (REE), lanthanum (La) through lutecium (Lu). Several additional, non-REE analyses were obtained as well. Commercially available REE analyses have proved to be insufficiently sensitive for geochemical purposes. Dr. Roman Schmitt at the Radiation Center at Oregon State University in Corvallis was sent five samples as a trial effort. The results are very encouraging. The purpose of compiling Dr. Schmitt`s report and the other materials is to inform the sponsor of his independent observations of these results and other information that sent to him. To provide a more complete appreciation of the utility of REE analyses a copy of Dave Vaniman`s recent article is included in which he notes that REE analyses from Yucca Mountain indicate the occurrence of two distinctly different REE patterns as do several other chemical parameters of the calcite-silica deposits. Our four samples with high equivalent CaCO{sub 3} were collected from sites we believe to be spring deposits. One sample, 24D, is from southern Crater Flat which is acknowledged by U.S.G.S. investigators to be a spring deposit. All four of these samples have REE patterns similar to those from the saturated zone reported by Vaniman.

Livingston, D.

1993-07-01T23:59:59.000Z

256

E-Print Network 3.0 - aquifer beneath yucca Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Yucca Mountain during 1996 produced a great deal Source: U.S. Nuclear Waste Technical Review Board Collection: Fission and Nuclear Technologies ; Environmental Management and...

257

Ground water of Yucca Mountain: How high can it rise?; Final report  

SciTech Connect (OSTI)

This report describes the geology, hydrology, and possible rise of the water tables at Yucca Mountain. The possibilities of rainfall and earthquakes causing flooding is discussed.

NONE

1992-12-31T23:59:59.000Z

258

Proposed stratigraphic nomenclature and macroscopic identification of lithostratigraphic units of the Paintbrush Group exposed at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

This paper describes the formations of the Paintbrush Group exposed at Yucca Mountain, Nevada, presents a detailed stratigraphic nomenclature for the Tiva Canyon and Topopah spring Tuffs, and discusses the criteria that define lithostratigraphic units. The Tiva Canyon and Topopah Spring Tuffs are divided into zones, subzones, and intervals on the basis of macroscopic features observed in surface exposures and borehole samples. Primary divisions reflect depositional and compositional zoning that is expressed by variations in crystal content, phenocryst assemblage, pumice content and composition, and lithic content. Secondary divisions define welding and crystlalization zones, depositional features, or fracture characteristics. Both formations are divided into crystal-rich and crystal-poor members that have an identical sequency of zones, although subzone designations vary slightly between the two units. The identified lithostratigraphic divisions can be used to approximate thermal-mechanical and hydrogeologic boundaries in the field. Linking these three systems of nomenclature provides a framework within which to correlate these properties through regions of sparse data.

Buesch, D.C.; Spengler, R.W.; Moyer, T.C.; Geslin, J.K.

1996-09-01T23:59:59.000Z

259

The National Repository at Yucca Mountain, Russ Dyer  

Broader source: Energy.gov (indexed) [DOE]

Repository at Repository at Yucca Mountain Presented to: EM High Level Waste Corporate Board Presented by: Russ Dyer Chief Scientist Office of Civilian Radioactive Waste Management July 24, 2008 Idaho National Laboratory 2 SBBB-GeneralBriefing_070808Rev1.ppt Solving a national problem now * On June 3, 2008, the U.S. Department of Energy submitted an application to the U.S. Nuclear Regulatory Commission for a license to construct a repository at Yucca Mountain 3 SBBB-GeneralBriefing_070808Rev1.ppt Repository license application * The LA seeks authorization to construct the nation's first geologic repository * It is a culmination of more than 25 years of scientific research and engineering * The LA describes DOE's plan to safely isolate spent nuclear fuel and high-level radioactive

260

Geophysical investigation of concealed faults near Yucca Mountain, southwest Nevada  

SciTech Connect (OSTI)

Detailed gravity and ground magnetic data collected along surveyed traverses across Midway Valley, on the eastern flank of Yucca Mountain, Nevada reveal that these methods can be used to delineate concealed faults. These studies are part of an effort to evaluate faulting in the vicinity of the proposed surface facilities for a potential nuclear waste repository at Yucca Mountain. The largest gravity and magnetic anomaly in the vicinity of Midway Valley is associated with the Paintbrush fault on the west flank of Alice Ridge. Geophysical data infer a vertical offset of about 200 m (650 ft). Another prominent gravity and magnetic anomaly is associated with the Bow Ridge fault in the western part of Midway Valley.

Ponce, D.A. [Geological Survey, Menlo Park, CA (United States)

1993-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

TBM tunneling on the Yucca Mountain Project: Proceedings  

SciTech Connect (OSTI)

The US Department of Energy`s (DOE) Yucca Mountain Project (YMP) is a scientific endeavor to determine the suitability of Yucca Mountain for the first long term, high level nuclear waste repository in the United States. Status of this long-term project form the construction perspective is described. A key element is construction of the Exploratory Studies Facility (ESF), which is being excavated with a 7. 6 m(25 ft) diameter tunnel boring machine (TBM). Development of the ESF may include the excavation of over 15 km (9.3 mi) of tunnel varying in size from 3 to 7.6 m(10 to 25 ft). Prior to construction, extensive constructibility reviews were an interactive part of the final design. Intent was to establish a constructible design that met the long-term stability requirements for radiological safety of a future repository while maintaining flexibility for the scientific investigations and acceptable tunneling productivity.

Williamson, G.E.; Gowring, I.M. [ed.

1995-07-01T23:59:59.000Z

262

The Hydrogeologic Character of the Lower Tuff Confining Unit and the Oak Springs Butte Confining Unit in the Tuff Pile Area of Central Yucca Flat  

SciTech Connect (OSTI)

The lower tuff confining unit (LTCU) in the Yucca Flat Corrective Action Unit (CAU) consists of a monotonous sequence of pervasively zeolitized volcanic tuff (i.e., mostly bedded with lesser nonwelded to poorly welded tuff; not fractured) (Bechtel Nevada, 2006). The LTCU is an important confining unit beneath Yucca Flat because it separates the alluvial and volcanic aquifers, where many underground nuclear tests were conducted, from the regional lower carbonate aquifer. Recent sub-CAU-scale modeling by Los Alamos National Laboratory in the Tuff Pile area of Yucca Flat (Boryta, et al., in review) includes postulated low-porosity, high-permeability zones (i.e., fractured welded-tuff aquifers) within the LTCU. This scenario indicates that such postulated low-porosity, high-permeability zones could provide fast-path lateral conduits to faults, and eventually to the lower carbonate aquifer. A fractured and faulted lower carbonate aquifer is postulated to provide a flow path(s) for underground test-derived contaminants to potential offsite receptors. The ramifications of such a scenario are obvious for groundwater flow and contaminant migration beneath Yucca Flat. This paper describes the reasoning for not including postulated low-porosity, high-permeability zones within the LTCU in the Tuff Pile area or within the LTCU in the Yucca Flat CAU-scale model. Both observational and analytical data clearly indicate that the LTCU in the Tuff Pile area consists of pervasively zeolitic, nonwelded to poorly welded tuffs that are classified as tuff confining units (i.e., high-porosity, low-permeability). The position regarding the LTCU in the Tuff Pile area is summarized as follows: • The LTCU in the Tuff Pile area consists of a monotonous sequence of predominantly zeolitic nonwelded to poorly welded tuffs, and thus is accurately characterized hydrogeologically as a tuff confining unit (aquitard) in the Yucca Flat-Climax Mine hydrostratigraphic framework model (Bechtel Nevada, 2006). • No welded-tuff (or lava-flow aquifers), referred to as low-porosity, high-permeability zones in Boryta et al. (in review), are present within the LTCU in the Tuff Pile area. • Fractures within the LTCU are poorly developed, a characteristic of zeolitic tuffs; and fracture distributions are independent of stratigraphic and lithologic units (Prothro, 2008). • Groundwater flow and radionuclide transport will not be affected by laterally extensive zones of significantly higher permeability within the LTCU in the Tuff Pile area. Although not the primary focus of this report, the hydrogeologic character of the Oak Spring Butte confining unit (OSBCU), located directly below the LTCU, is also discussed. The OSBCU is lithologically more diverse, and does include nonwelded to partially welded ash-flow tuffs. However, these older ash-flow tuffs are poorly welded and altered (zeolitic to quartzofeldspathic), and consequently, would tend to have properties similar to a tuff confining unit rather than a welded-tuff aquifer.

Sigmund L. Drellack, Jr., Lance B. Prothro, Jose L. Gonzales, and Jennifer M. Mercadante

2010-07-30T23:59:59.000Z

263

Saturated Zone In-Situ Testing  

SciTech Connect (OSTI)

The purpose of this scientific analysis is to document the results and interpretations of field experiments that have been conducted to test and validate conceptual flow and radionuclide transport models in the saturated zone (SZ) near Yucca Mountain. The test interpretations provide estimates of flow and transport parameters that are used in the development of parameter distributions for Total System Performance Assessment (TSPA) calculations. These parameter distributions are documented in the revisions to the SZ flow model report (BSC 2003 [ 162649]), the SZ transport model report (BSC 2003 [ 162419]), the SZ colloid transport report (BSC 2003 [162729]), and the SZ transport model abstraction report (BSC 2003 [1648701]). Specifically, this scientific analysis report provides the following information that contributes to the assessment of the capability of the SZ to serve as a barrier for waste isolation for the Yucca Mountain repository system: (1) The bases for selection of conceptual flow and transport models in the saturated volcanics and the saturated alluvium located near Yucca Mountain. (2) Results and interpretations of hydraulic and tracer tests conducted in saturated fractured volcanics at the C-wells complex near Yucca Mountain. The test interpretations include estimates of hydraulic conductivities, anisotropy in hydraulic conductivity, storativities, total porosities, effective porosities, longitudinal dispersivities, matrix diffusion mass transfer coefficients, matrix diffusion coefficients, fracture apertures, and colloid transport parameters. (3) Results and interpretations of hydraulic and tracer tests conducted in saturated alluvium at the Alluvium Testing Complex (ATC), which is located at the southwestern corner of the Nevada Test Site (NTS). The test interpretations include estimates of hydraulic conductivities, storativities, total porosities, effective porosities, longitudinal dispersivities, matrix diffusion mass transfer coefficients, and colloid transport parameters. (4) Comparisons of sorption parameter estimates for a reactive solute tracer (lithium ion) derived from both the C-wells field tracer tests and laboratory tests using C-wells core samples. (5) Sorption parameter estimates for lithium ion derived from laboratory tests using alluvium samples from NC-EWDP-19D1 (one of the wells at the ATC) so that a comparison of laboratory- and field-derived sorption parameters can be made in saturated alluvium if cross-hole tracer tests are conducted at the ATC.

P. W. Reimus; M. J. Umari

2003-12-23T23:59:59.000Z

264

Draft reclamation program plan for site characterization; Yucca Mountain project  

SciTech Connect (OSTI)

As part of its obligations under the Nuclear Waste Policy Act, as amended, the US Department of Energy (DOE) has developed an environmental program that is to be implemented during site characterization at the Yucca Mountain site. This site is proposed for the location of the nation`s first high-level radioactive waste repository. A program for the reclamation of areas disturbed by site characterization is part of the overall environmental program for that site. This Reclamation Program Plan (RPP) describes the reclamation policy of the DOE for the Yucca Mountain site and presents an overview of the reclamation program. The RPP also provides an overview of the reclamation needs relative to site characterization; a review of legislation and requirements pertinent to reclamation; and a review of previous commitments made by the DOE to certain types of reclamation activities. The objective of the DOE reclamation program at Yucca Mountain is to return land disturbed by site-characterization activities to a stable ecological state with a form and productivity similar to the predisturbance state. The DOE will take all reasonable and necessary steps to achieve this objective. 19 refs., 2 tabs.

NONE

1989-08-01T23:59:59.000Z

265

Animist Intersubjectivity as Argumentation: Western Shoshone and Southern Paiute Arguments Against a Nuclear Waste Site at Yucca Mountain  

Science Journals Connector (OSTI)

My focus in this essay is Shoshone and Paiute arguments against the Yucca Mountain site that claim that because Yucca Mountain is a culturally significant sacred place it ... set of arguments for the cultural val...

Danielle Endres

2013-05-01T23:59:59.000Z

266

Examining Repository Loading Options to Expand Yucca Mountain Repository Capacity  

SciTech Connect (OSTI)

Siting a high level nuclear waste repository entails high economic, social, and political costs. Given the difficulty in siting the Yucca Mountain repository and the already identified need for additional capacity, the concept of expanding the capacity of the Yucca Mountain repository is of significant interest to the nuclear industry and the Department of Energy (DOE). As the capacity of the repository is limited by the decay heat inventory of the spent nuclear fuel in relation to the thermal design limits, expanding the capacity requires appropriate schemes for decay heat and spent fuel loading management. The current Yucca Mountain repository is based on a single level, fixed drift spacing design for a fixed area or footprint. Studies performed to date investigating the capacity of Yucca Mountain often assume that the loading of spent fuel is uniform throughout the repository and use the concept of a linear loading or areal power density (APD). However, use of linear loading or APD can be problematic with the various cooling times involved. The temperature within the repository at any point in time is controlled by the integral of the heat deposited in the repository. The integral of the decay heat varies as a function of pre-loading cooling periods even for a fixed linear loading. A meaningful repository capacity analysis requires the use of a computer model that describes the time-dependent temperature distributions of the rock from the dissipation of the heat through the repository system. If variations from the current Yucca Mountain repository design were to be considered, expanding the capacity of the repository would be pursued in several ways including: (1) increase the footprint size; (2) implement multiple-levels in the repository for the given footprint; (3) allow the drift distance to vary within thermal limits; and, (4) allow non-uniform loading of wastes into the drifts within thermal limits. Options (1) and (2) have been investigated by other researchers. This paper investigates options (3) and (4) for possible expansion of the Yucca Mountain repository capacity. To support the work, a thermal analysis model was needed to describe the temperature changes in the rock around the waste packages against the thermal design limits as a function of spent fuel characteristics and composition. Under the high temperature operating mode (HTOM), the relevant thermal design limits are: (1) the rock temperature midway between adjacent drifts must remain below the local boiling point (96 deg. C); and (2) the rock temperature at drift walls must remain below 200 deg. C. As the work involves a large number of calculations, examining the compliance within thermal design limits, the capability to perform efficient mountain-scale heat-transfer analyses was necessary. A related topic of importance in this investigation was also the effect of uncertainty. As the modeling exercise relies on the use of computational models, uncertainties are unavoidable and understanding the uncertainty in the interpretation of the results is important. The concept of variable drift spacing and variable drift thermal loading was investigated with respect to possible capacity expansion of the Yucca Mountain repository. Also, a computer model was developed for efficient repository heat transfer calculations and sensitivity and uncertainty analyses were performed to identify key parameters and to estimate the uncertainty in the results and understand how the repository capacity estimation would be affected by the uncertainty. (authors)

Li, Jun; Nicholson, Mark; Proctor, W. Cyrus; Yim, Man-Sung; McNelis, David [Department of Nuclear Engineering, North Carolina State University (United States)

2007-07-01T23:59:59.000Z

267

Student Zone  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Student Zone Student Zone Homework Helpers All About Atoms - Learn about the parts of the atom! Virginia State Standards of Learning Practice Tests - Practice taking the SOL tests! Subjects currently include algebra, math, science and technology. Table of Elements - Basic physical and historical information about the elements! [Printable Version] Questions and Answers - Have a question? Need an answer? Check here first! Glossary of Science Terms - Definitions of some of the terms used on this site. Jefferson Lab Virtual Tour - How do scientists explore inside atoms? Video Resources Frostbite Theater - Short science experiments using liquid nitrogen, static electricity and more! Physics Out Loud - Jefferson Lab scientists and other experts explain some of the common words and terms used in nuclear physics research.

268

Going Beyond 10,000 Years at Yucca Mountain P.F. Peterson, W.E. Kastenberg  

E-Print Network [OSTI]

Going Beyond 10,000 Years at Yucca Mountain P.F. Peterson, W.E. Kastenberg University of California the federal government's Yucca Mountain (YM) nuclear waste repository project. The successful challenge at Yucca Mountain Currently, the best available understanding of potential long-term performance at YM

269

Near-field/altered-zone models report  

SciTech Connect (OSTI)

The U.S. Department of Energy is studying Yucca Mountain as the possible site for the first underground repository for permanent disposal of spent fuel from commercial nuclear reactors as well as for other types high-level nuclear waste. Emplacement of high-level radioactive waste, especially commercial spent nuclear fuel (CSNF), in Yucca Mountain will release a large amount of heat into the rock above and below the repository. The heating rate will decrease with time, creating a thermal pulse. Over a period of several thousand years, the rock temperature will rise initially, then drop when the production of decay heat falls below the rate at which heat escapes from the hot zone. Besides raising the rock temperature, much of this heat will vaporize water, which will then condense in cooler regions. The condensate is likely to form a gravity-driven heat pipe above the repository, creating the possibility that water may drain back onto the waste packages (WPs) or that it may ''shed'' through the pillars between emplacement drifts. The long-term importance of these effects has been investigated through the development, testing, and application of thermohydrologic (TH) models. Other effects, such coupled chemical and mechanical processes, may also influence the movement of water above, within, and below the emplacement drifts. A recent report on thermally driven coupled processes (Hardin and Chesnut, 1997) provides a qualitative assessment of the probable significance of these processes for the Yucca Mountain Site Characterization Project (YMSCP) and is the phenomenological framework for the present report. This report describes the conceptual and numerical models that have been developed to predict the thermal, mechanical, hydrologic, and chemical responses to the cumulative heat production of the potential host rock at Yucca Mountain. As proposed, the repository horizon will be situated within the Topopah Spring tuff, in the adjacent middle nonlithophysal and lower lithophysal units. These units are made up of moderately to densely welded, devitrified, fractured tuff. The rock's chemical composition is comparable to that of typical granite, but has textural features and mineralogical characteristics of large-scale, silicic volcanism. Because the repository horizon will be approximately 300 m below the ground surface and 200 m above the water table, the repository will be partially saturated. The welded tuff matrix in the host units is highly impermeable, but water and gas flow readily through fractures. The degree of fracturing in these units is highly variable, and the hydrologic significance of fracturing is an important aspect of site investigation. This report describes the characterization and modeling of a region around the potential repository--the altered zone--a region in which the temperature will be increased significantly by waste-generated heat. Numerical simulation has shown that, depending on the boundary conditions, rock properties, and repository design features incorporated in the models, the altered zone (AZ) may extend from the water table to the ground surface. This report also describes models of the near field, the region comprising the repository emplacement drifts and the surrounding rock, which are critical to the performance of engineered components. Investigations of near-field and altered-zone (NF/AZ) processes support the design of underground repository facilities and engineered barriers and also provide constraint data for probabilistic calculations of waste-isolation performance (i.e., performance assessment). The approach to investigation, which is an iterative process involving hypothesis testing and experimentation, has relied on conceptualizing engineered barriers and on performance analysis. This report is a collection, emphasizing conceptual and numerical models, of the recent results contributed from studies of NF/AZ processes and of quantitative measures of NF/AZ performance. The selection and presentation of contributions are intended to show the iterative development of understand

Hardin, E. L., LLNL

1998-03-01T23:59:59.000Z

270

Process for making unsaturated hydrocarbons using microchannel process technology  

DOE Patents [OSTI]

The disclosed invention relates to a process for converting a feed composition comprising one or more hydrocarbons to a product comprising one or more unsaturated hydrocarbons, the process comprising: flowing the feed composition and steam in contact with each other in a microchannel reactor at a temperature in the range from about 200.degree. C. to about 1200.degree. C. to convert the feed composition to the product, the process being characterized by the absence of catalyst for converting the one or more hydrocarbons to one or more unsaturated hydrocarbons. Hydrogen and/or oxygen may be combined with the feed composition and steam.

Tonkovich, Anna Lee (Dublin, OH); Yuschak, Thomas (Lewis Center, OH); LaPlante, Timothy J. (Columbus, OH); Rankin, Scott (Columbus, OH); Perry, Steven T. (Galloway, OH); Fitzgerald, Sean Patrick (Columbus, OH); Simmons, Wayne W. (Dublin, OH); Mazanec, Terry (Solon, OH) Daymo, Eric (Dublin, OH)

2011-04-12T23:59:59.000Z

271

Prepared in cooperation with the Inyo County, California, Yucca Mountain Repository Assessment Office  

E-Print Network [OSTI]

Prepared in cooperation with the Inyo County, California, Yucca Mountain Repository Assessment County, California, Yucca Mountain Repository Assessment Office #12;U.S. Department of the Interior KEN Office Geologic Map of the southern Funeral Mountains including nearby Groundwater Discharge Sites

Fleskes, Joe

272

Parametric analysis of a 1-D infiltration model for Yucca Mountain  

SciTech Connect (OSTI)

Hydrogeological properties of the formations at Yucca Mountain have been previously characterized by log-normal distributions. Different realizations of the randomly described formation may assume different hydrological behaviors, and different property variations may exert influences of different significance levels. This study presents a parametric sensitivity and uncertainty analyses of steady-state infiltration through a representative column of the formations at Yucca Mountain.

Xiang, Yangyong; Mishra, S.

1996-08-01T23:59:59.000Z

273

Sub-crop geologic map of pre-Tertiary rocks in the Yucca Flat and northern Frenchman Flat areas, Nevada Test Site, southern Nevada  

SciTech Connect (OSTI)

This map displays interpreted structural and stratigraphic relations among the Paleozoic and older rocks of the Nevada Test Site region beneath the Miocene volcanic rocks and younger alluvium in the Yucca Flat and northern Frenchman Flat basins. These interpretations are based on a comprehensive examination and review of data for more than 77 drillholes that penetrated part of the pre-Tertiary basement beneath these post-middle Miocene structural basins. Biostratigraphic data from conodont fossils were newly obtained for 31 of these holes, and a thorough review of all prior microfossil paleontologic data is incorporated in the analysis. Subsurface relationships are interpreted in light of a revised regional geologic framework synthesized from detailed geologic mapping in the ranges surrounding Yucca Flat, from comprehensive stratigraphic studies in the region, and from additional detailed field studies on and around the Nevada Test Site. All available data indicate the subsurface geology of Yucca Flat is considerably more complicated than previous interpretations have suggested. The western part of the basin, in particular, is underlain by relics of the eastward-vergent Belted Range thrust system that are folded back toward the west and thrust by local, west-vergent contractional structures of the CP thrust system. Field evidence from the ranges surrounding the north end of Yucca Flat indicate that two significant strike-slip faults track southward beneath the post-middle Miocene basin fill, but their subsurface traces cannot be closely defined from the available evidence. In contrast, the eastern part of the Yucca Flat basin is interpreted to be underlain by a fairly simple north-trending, broad syncline in the pre-Tertiary units. Far fewer data are available for the northern Frenchman Flat basin, but regional analysis indicates the pre-Tertiary structure there should also be relatively simple and not affected by thrusting. This new interpretation has implications for ground water flow through pre-Tertiary rocks beneath the Yucca Flat and northern Frenchman Flat areas, and has consequences for ground water modeling and model validation. Our data indicate that the Mississippian Chainman Shale is not laterally extensive confining unit in the western part of the basin because it is folded back onto itself by the convergent structures of the Belted Range and CP thrust systems. Early and Middle Paleozoic limestone and dolomite are present beneath most of both basins and, regardless of structural complications, are interpreted to form a laterally continuous and extensive carbonate aquifer. Structural culmination that marks the French Peak accommodation zone along the topographic divide between the two basins provides a lateral pathway through highly fractured rock between the volcanic aquifers of Yucca Flat and the regional carbonate aquifer. This pathway may accelerate the migration of ground-water contaminants introduced by underground nuclear testing toward discharge areas beyond the Nevada Test Site boundaries. Predictive three-dimensional models of hydrostratigraphic units and ground-water flow in the pre-Tertiary rocks of subsurface Yucca Flat are likely to be unrealistic due to the extreme structural complexities. The interpretation of hydrologic and geochemical data obtained from monitoring wells will be difficult to extrapolate through the flow system until more is known about the continuity of hydrostratigraphic units. 1 plate

Cole, J.C.; Harris, A.G.; Wahl, R.R.

1997-10-02T23:59:59.000Z

274

Low-frequency dilatational wave propagation through unsaturated porous media containing two immiscible fluids  

E-Print Network [OSTI]

of elastic waves in unconsolidated unsaturated granularfrequency in both unconsolidated and consolidated materialsboth consolidated and unconsolidated porous media, and the

Lo, W.-C.

2009-01-01T23:59:59.000Z

275

Yucca Mountain - The Department of Energy's Status Report on Its Archiving  

Broader source: Energy.gov (indexed) [DOE]

The Department of Energy's Status Report on Its The Department of Energy's Status Report on Its Archiving Plan Yucca Mountain - The Department of Energy's Status Report on Its Archiving Plan Proceeding before the Nuclear Regulatory Commission on DOE's application for a license to construct a high-level waste repository at Yucca Mountain, Nevada; DOE provides answers to the questions of the Atomic Safety and Licensing Board regarding its plans to archive its document collection on the Licensing Support Network. Yucca Mountain - The Department of Energy's Status Report on Its Archiving Plan More Documents & Publications U.S. Department of Energy's Response to Petitions to Intervene Yucca Mountain - U.S. Department of Energy's Reply to the Responses to the Motion to Withdraw Yucca Mountain - U.S. Department of Energy's Brief in Support of Review and

276

Yucca Mountain - U.S. Department of Energy's Response to the Motion for  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain - U.S. Department of Energy's Response to the Motion Yucca Mountain - U.S. Department of Energy's Response to the Motion for Recusal/Disqualification Yucca Mountain - U.S. Department of Energy's Response to the Motion for Recusal/Disqualification Brief filed before the Nuclear Regulatory Commission in the proceeding on DOE's applciation to construct a high-level waste repository at Yucca Mountain, Nevada; DOE opposes the motion of Washington, South Carolina, Aiken County, and White Pine County to disqualify Commissioners Magwood and Ostendorff from voting on the appeal of the Atomic Safety and Licensing Board's denial of DOE's motion to withdraw its application. Yucca Mountain - U.S. Department of Energy's Response to the Motion for Recusal/Disqualification More Documents & Publications 3116 Public Meeting Summaries - November 2006

277

EVALUATION OF THE CORROSIVITY OF DUST DEPOSITED ON WASTE PACKAGES AT YUCCA MOUNTAIN, NEVADA  

SciTech Connect (OSTI)

Potentially corrosive brines can form during post-closure by deliquescence of salt minerals in dust deposited on the surface of waste packages at Yucca Mountain during operations and the pre-closure ventilation period. Although thermodynamic modeling and experimental studies of brine deliquescence indicates that brines are likely to form, they will be nitrate-rich and non-corrosive. Processes that modify the brines following deliquescence are beneficial with respect to inhibition of corrosion. For example, acid degassing (HCl, HNO{sub 3}) could dry out brines, but kinetic limitations are likely to limit the effect to increasing their passivity by raising the pH and increasing the NO{sub 3}/Cl ratio. Predicted dust quantities and maximum brine volumes on the waste package surface are small, and physical isolation of salt minerals in the dust may inhibit formation of eutectic brines and decrease brine volumes. If brines do contact the WP surface, small droplet volumes and layer thicknesses do not support development of diffusive gradients necessary for formation on separate anodic-cathodic zones required for localized corrosion. Finally, should localized corrosion initiate, corrosion product buildup will stifle corrosion, by limiting oxygen access to the metal surface, by capillary retention of brine in corrosion product porosity, or by consumption of brine components (Cl{sup -}).

C. Bryan; R. Jack; T, Wolery; D. Shields; M. Sutton; E. Hardin; D. Barr

2005-08-03T23:59:59.000Z

278

PHENOLICS BUILDUP INHIBITS CARBON LOSS IN UNSATURATED PEATLANDS  

E-Print Network [OSTI]

feedback loop" between carbon emission and drought in peatlands is down regulated in the long term. WePHENOLICS BUILDUP INHIBITS CARBON LOSS IN UNSATURATED PEATLANDS Hongjun Wang, Mengchi Ho, Neal carbon. Drought/drainage coupled with climate warming presents a vital threat to those stores

279

Preparation of {alpha},{beta}-unsaturated carboxylic acids and esters  

DOE Patents [OSTI]

Disclosed is a process for the preparation of {alpha},{beta}-unsaturated carboxylic acids and esters thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic acid, ester or anhydride in the presence of a catalyst comprising an oxide of niobium.

Gogate, M.R.; Spivey, J.J.; Zoeller, J.R.

1998-09-15T23:59:59.000Z

280

Stratigraphy of the Yucca Formation, Indio Mountains, west Texas  

SciTech Connect (OSTI)

The Indio Mountains are located 25 miles south of Van Horn, Texas, on the northwestern margin of the Chihuahua Tectonic Belt. The Indio Mountains are composed of Cretaceous sedimentary rocks deposited on the edge of the Chihuahua trough. The focus of this study, the Yucca conglomerate, is the oldest known Mesozoic rock in the region, although its unconformable base is not exposed within the Indio Mountains. This area has been affected by faulting associated with both the Chihuahua tectonic belt and the Rio Grande Rift. During summer 1992, the authors measured a stratigraphic section through the Yucca conglomerate, using a custom made Jacob's staff. The measured section is over 500 meters thick and was measured and described in 3 meter intervals. The section was measured up a single valley, and did contain some minor faults. This project had three objectives: (1) to examine variations in the sand/conglomerate ratio throughout the Yucca Fm.; (2) to examine variations in conglomerate clast composition using outcrop and thin section analysis; and, (3) ultimately, to compare this stratigraphic section with sections measured by Underwood (1962) in the Eagle Mountains and Devil's Ridge to the northwest. The sand/conglomerate ratio varies, with the proportion of sand increasing up section. At the base of the section, the rocks are mostly clast supported conglomerate interbedded with thin (12 cm) sand layers. The top of the section is dominated by sandstones with pebble stringers, with some massive sand layers over 6m thick. Few truly conglomeratic layers are present near the top of the section. The composition of clasts within the conglomerate also varies. The carbonate clasts are often preferentially eroded. The carbonate content increases up section.

Smith, D.E.; Julian, F.E. (Univ. of Texas, El Paso, TX (United States). Dept. of Geological Sciences)

1993-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Calculations supporting evaluation of potential environmental standards for Yucca Mountain  

SciTech Connect (OSTI)

The Energy Policy Act of 1992, Section 801 (US Congress, 1992) provides for the US Environmental Protection Agency (EPA) to contract the National Academy of Sciences (NAS) to conduct a study and provide findings and recommendations on reasonable standards for the disposal of high-level wastes at the Yucca Mountain site. The NAS study is to provide findings and recommendations which include, among other things, whether a health-based standard based on dose to individual members of the public from releases to the accessible environment will provide a reasonable standard for the protection of the health and safety of the public. The EPA, based upon and consistent with the findings and recommendations of the NAS, is required to promulgate standards for protection of the public from releases from radioactive materials stored or disposed of in a repository at the Yucca Mountain site. This document presents a number of different ``simple`` analyses of undisturbed repository performance that are intended to provide input to those responsible for setting appropriate environmental standards for a potential repository at the Yucca Mountain site in Nevada. Each of the processes included in the analyses has been simplified to capture the primary significance of that process in containing or isolating the waste from the biosphere. In these simplified analyses, the complex waste package interactions were approximated by a simple waste package ``failure`` distribution which is defined by the initiation and rate of waste package ``failures``. Similarly, releases from the waste package and the engineered barrier system are controlled by the very near field environment and the presence and rate of advective and diffusive release processes. Release was approximated by either a simple alteration-controlled release for the high solubility radionuclides and either a diffusive or advective-controlled release for the solubility-limited radionuclides.

Duguid, J.O.; Andrews, R.W.; Brandstetter, E.; Dale, T.F.; Reeves, M. [INTERA, Inc., Las Vegas, NV (United States)

1994-04-01T23:59:59.000Z

282

Bomb-Pulse Chlorine-36 at the Proposed Yucca Mountain Repository Horizon: An Investigation of Previous Conflicting Results and Collection of New Data  

SciTech Connect (OSTI)

Previous studies Los Alamos National Laboratory (LANL) found elevated ratios of chlorine-36 to total chloride (36Cl/Cl) in samples of rock collected from the Exploratory Studies Facility (ESF) at Yucca Mountain (YM). The data were interpreted as an indication that fluids containing “bomb-pulse” 36Cl reached the repository horizon in the ~50 years since the peak period of above-ground nuclear testing. Due to the significance of 36Cl data to conceptual models of unsaturated zone flow, the United States Geological Survey (USGS) implemented a study to validate the LANL findings. The USGS drilled new boreholes at select locations across zones where bomb-pulse ratios had previously been identified. The drill cores were analyzed at Lawrence Livermore National Laboratory (LLNL). Because consensus was not reached between the USGS/LLNL and LANL on several fundamental points including the presence or absence of bomb-pulse 36Cl, an evaluation by the University of Nevada, Las Vegas (UNLV), was initiated. The overall objectives of the UNLV study were to investigate the source of the validation study’s conflicting results, and to obtain additional data on bomb-pulse isotopes at the repository horizon. UNLV engaged in discussions with previous investigators, reviewed reports, and analyzed archived samples. UNLV also collected new samples of rock from the ESF, soil profiles from the surface of YM, and samples of seep water from inside the ESF. Samples were analyzed for 36Cl/Cl ratios, and 99Tc and 129I in select samples. A column experiment was conducted mimicking the passage of bomb-pulse 36Cl through YM tuff. The work faced several obstacles including an extended shutdown of the tunnel. Only one sample yielded a background corrected 36Cl/Cl ratio that was higher than the accepted bomb-pulse threshold (1250 x 10-15). Specimen 01034214 obtained from the Drill Hole Wash fault (19+33) had a ratio of 1590 ± 80 (1?) x10-15, whereas the other separate sample from this fault zone yielded 1160 ± 50 (1?) x 10-15. Three samples collected from Alcove 6 averaged 490 ± 100 (1?) x10-15; a sample from Sundance Fault resulted in a ratio of 920 ± 60 (1?) x10-15, and a sample from the Bow Ridge Fault produced 530 ± 20 (1?) x10-15. The results are significant because: 1) they tend to be lower than LANL data for comparable samples, albeit in agreement with the range of data produced in the area, and 2) they show that a bomb-pulse 36Cl/Cl ratio was measured in rock collected at the repository horizon level by a second and independent group of investigators (UNLV). Because of time UNLV was not able to replicate the results, and these few data points are insufficient to draw major and definitive conclusions. Leachates of soil samples collected from the surface above the ESF yielded several ratios with bomb-pulse 36Cl, particularly for samples encompassing the wetting front. Soil samples collected above the south ramp, where there was limited soil coverage due to a large amount of rock outcrop, had relatively large ratios ranging from 2170 ± 110 (1?) x10-15 to 5670 ± 350 (1?) x10-15. Soil samples from profiles from above the north ramp ranged from 820 ± 70 (1?) x10-15 to 2390 ± 160 (1?) x10-15, which compare favorably with previous measurements near the site. Water seepage into the ESF south ramp and 36Cl standards made from NIST material were also analyzed. The standards were produced to have nominal 36Cl/Cl ratios (10-15) of 500, 2,500 and 10,000 and the results showed good agreement with the calculated ratios. The seepage samples ranged between 680 ± 40 (1?) x10-15 to 1110 ± 40 (1?) x10-15, consistent with that found for modern meteoric water, with a small bomb-pulse component. Bomb-pulse 36Cl may not have been incorporated in this fast-path water because the surface above the infiltration zone consists mostly of outcrop and the flow pathways have probably mostly been leached. 99Tc was measured in five of nine leaches of ESF rock but poor analytical recoveries and lack of data overlap with 36Cl limit interpretations of these data

Cizdziel, James

2006-07-31T23:59:59.000Z

283

Implementation of NUREG-1318 guidance within the Yucca Mountain Project  

SciTech Connect (OSTI)

The US Department of Energy`s Yucca Mountain Project is implementing a quality assurance program that fulfills the requirements of the US Nuclear Regulatory Commission (NRC). Additional guidance for this program was provided in NUREG 1318, ``Technical Position on Items and Activities in the High-Level Waste Geologic Repository Program Subject to Quality Assurance Requirements`` for identification of items and activities important to public radiological safety and waste isolation. The process and organization for implementing this guidance is discussed. 3 refs., 2 figs.

La Monica, L.B.; Waddell, J.D.; Hardin, E.L.

1990-04-01T23:59:59.000Z

284

Effect of Hydrofracking Fluid on Colloid Transport in the Unsaturated Zone  

Science Journals Connector (OSTI)

(1, 9, 10) Land application of flowback fluids as a means of waste disposal has been permitted by several states in the US, though many regulations are currently under review because of potential impacts of this practice on the environment, such as severe vegetation damage and mortality. ... In order to thoroughly evaluate whether gas drilling by hydrofracking is a safe energy source, it is imperative to include waste disposal and accidental spills in its environmental impact assessment. ... Likewise, it is essential to know how fracking fluid affects the environment in case there is a spill, as this process knowledge is required to design effective ways to mitigate environmental accidents. ...

Wenjing Sang; Cathelijne R. Stoof; Wei Zhang; Verónica L. Morales; Bin Gao; Robert W. Kay; Lin Liu; Yalei Zhang; Tammo S. Steenhuis

2014-06-06T23:59:59.000Z

285

Preliminary results of trench mapping at the site of prospective surface facilities for the potential Yucca Mountain repository, Nevada  

SciTech Connect (OSTI)

Mapping and trenching studies are yielding data needed to evaluate the surface faulting potential within Midway Valley, a half graben bounded by west-dipping normal faults on the northeast margin of Yucca Mountain. These studies document the presence of two north-trending zones of fractures within Quaternary deposits along the west-central part of the Midway Valley half-graben block. The westernmost zone of fractures, located along the eastern base of Exile Hill, overlies a complex zone of bedrock faulting and may be related to an apparent down-on-the-east step in the contact between bedrock and colluvium. Fractures striking [approximately]N15E extend upwards from this apparent bedrock step through early ( ) to middle ( ) Pleistocene colluvium. The fractures do not extend into the overlying late Pleistocene colluvium. No vertical or lateral separation of the probably middle to late Pleistocene colluvium across fractures can be detected with a resolution of 5 cm or less in most cases. The Quaternary deposits are much thicker along the eastern zone of fractures and bedrock was not exposed. The presence of continuous thin layers within the alluvial strata demonstrate the absence of any detectable vertical or lateral separation of the middle ( ) Pleistocene deposits across the fractures within the eastern zone with a high degree of confidence. The results of the authors studies indicate that faults within the west-central part of the Midway Valley structural block have had little or no displacement since at least the mid Quaternary. Therefore, potential for surface fault rupture in this area is extremely low.

Wesling, J.R.; Swan, F.H.; Thomas, A.P.; Angell, M.M. (Geomatrix Consultants, San Francisco, CA (United States))

1993-04-01T23:59:59.000Z

286

Advanced fuel cycles and impacts On The Yucca Mountain Repository  

SciTech Connect (OSTI)

One of the goals identified for advanced fuel cycles, such as that proposed by the Global Nuclear Energy Partnership, is to reduce the volume of wastes that would ultimately have to be disposed in a geologic repository. Besides reducing volume, techniques that recycle the vast majority of actinides along with the removal of key fission products also reduce the inventory of radionuclides that must ultimately be disposed and the thermal output of the wastes. Advanced recycling techniques may also generate waste forms having different characteristics than those that have been considered for disposal in a repository at Yucca Mountain to-date. These all have a potential impact on several aspects of a repository, such as the proposed repository at Yucca Mountain, including surface and subsurface facility design, pre-closure and post-closure safety analyses, and ultimately licensing. These changes would all have to be performed in accordance with the requirements at 10 CFR 63 and approved by the U.S. Nuclear Regulatory Commission in a license amendment prior to the disposal of any wastes from an advanced fuel cycle. (authors)

Nutt, W.M.; Peters, M.T. [Argonne National Laboratory, Argonne, IL (United States); Swift, P.N. [Sandia National Laboratories, New Mexico, Albuquerque, NM (United States)

2007-07-01T23:59:59.000Z

287

Isotopic studies of Yucca Mountain soil fluids and carbonate pedogenesis  

SciTech Connect (OSTI)

Secondary carbonates occurring within the soils, faults, and subsurface fractures of Yucca Mountain contain some of the best available records of paleoclimate and palehydrology for the potential radioactive waste repository site. This article discusses conceptual and analytical advances being made with regard to the interpretation of stable isotope data from pedogenic carbonates, specifically related to the {sup 13}C content of soil CO{sub 2}, CaCO{sub 3}, precipitation mechanisms, and isotopic fractionations between parent fluids and precipitating carbonates. The {sup 13}C content of soil carbon dioxide from Yucca Mountain and vicinity shows most of the usual patterns expected in such contexts: Decreasing {sup 13}C content with depth decreasing {sup 13}C with altitude and reduced {sup 13}C during spring. These patterns exist within the domain of a noisy data set; soil and vegetational heterogeneities, weather, and other factors apparently contribute to isotopic variability in the system. Several soil calcification mechanisms appear to be important, involving characteristic physical and chemical environments and isotopic fractionations. When CO{sub 2} loss from thin soil solutions is an important driving factor, carbonates may contain excess heavy isotopes, compared to equilibrium precipitation with soil fluids. When root calcification serves as a proton generator for plant absorption of soil nutrients, heavy isotope deficiencies are likely. Successive cycles of dissolution and reprecipitation mix and redistribute pedogenic carbonates, and tend to isotopically homogenize and equilibrate pedogenic carbonates with soil fluids.

McConnaughey, T.A.; Whelan, J.F.; Wickland, K.P.; Moscati, R.J.

1994-12-31T23:59:59.000Z

288

The Role of Natural Organic Matter and Mineral Colloids in the Transport of Contaminants through Heterogeneous Vadose-Zone Environments  

SciTech Connect (OSTI)

Our research was guided by a key objective of the Environmental Management Science Program (EMSP), which is to improve conceptual and predictive models for contaminant movement in complex vadose zone environments. In this report, increases in the understanding of colloidcontaminant interactions, colloid mobilization, and colloid deposition within unsaturated soils are cited as requisite needs for predicting contaminant fate and distribution in the vadose zone. We addressed these needs by pursuing three key goals: 1. Identify the mechanisms that govern OM and mineral-colloid reaction and transport in heterogeneous, unsaturated porous media; 2. Quantify the role of OM and mineral colloids in scavenging and facilitating the transport of contaminants of concern to DOE; and 3. Develop and test a mathematical model suitable for simulating the movement of OM- and colloid-associated contaminants through heterogeneous, unsaturated porous media.

James Saiers, Yale University (PI); Joseph Ryan, University of Colorado (Co-PI)

2009-01-31T23:59:59.000Z

289

Preliminary evaluation of the subsurface area available for a potential nuclear-waste repository at Yucca Mountain  

SciTech Connect (OSTI)

The Nevada Nuclear Waste Storage Investigations (NNWSI) Project, managed by the Nevada Operations Office of the US Department of Energy, is examining the feasibility of siting a repository for high-level radioactive waste at Yucca Mountain on and adjacent to the Nevada Test Site. The Topopah Spring Member of the Paintbrush Tuff has been recommended as the target geologic formation. One purpose of this study was to determine whether adequate area for the underground facility exists within the portion of the devitrified, densely welded Topopah Spring Member that contains less than 15 to 20% lithophysae. Areas were considered where the underground facility would be above the water table and at least 200 m below the surface. The thickness required for the repository zone was assumed to be 45 m. An area significantly larger than the area estimated to be required to accommodate the underground facility appears to be potentially useable from this study. However, because the primary area of exploration has been the central portion of north Yucca Mountain, adjacent areas are less well characterized. Portions of the areas identified in this study may not meet all of the above criteria. Additional exploration is required to determine tha acreage of the useable area. Another purpose of this study was to identify a preliminary location within the primary area of exploration, where conditions are favorable for the proposed underground facility. Using available information, this study has identified a slab that meets the above criteria. The slab dips 5{sup 0}6`NE from a strike direction of N11{sup 0}18`W. The area of the slab is about 1850 acres (7.49 km{sup 2}).

Mansure, A.J.; Ortiz, T.S.

1984-12-01T23:59:59.000Z

290

Pore-Water Extraction from Unsaturated Porous Media: Intermediate-Scale Laboratory  

SciTech Connect (OSTI)

As a remedial approach, vacuum-induced pore-water extraction offers the possibility of contaminant and water removal from the vadose zone, which may be beneficial in reducing the flux of vadose zone contaminants to groundwater. Vadose zone water extraction is being considered at the Hanford Site in Washington State as a means to remove technetium-99 contamination from low permeability sediments with relatively high water contents. A series of intermediate-scale laboratory experiments have been conducted to improve the fundamental understanding and limitations of the technique. Column experiments were designed to investigate the relations between imposed suctions, water saturations, and water production. Flow cell experiments were conducted to investigate the effects of high-permeability layers and near-well compaction on pore-water extraction efficiency. Results show that water extraction from unsaturated systems can be achieved in low permeability sediments, provided that the initial water saturations are relatively high. The presence of a high-permeability layer decreased the yield, and compaction near the well screen had a limited effect on overall performance. In all experiments, large pressure gradients were observed near the extraction screen. Minimum requirements for water extraction include an imposed vacuum-induced suction larger than the initial sediment capillary pressure, in combination with a fully saturated seepage-face boundary. A numerical multiphase simulator with a coupled seepage-face boundary conditions was used to simulate the experiments. Reasonable matches were obtained between measured and simulated results for both water extraction and capillary pressures, suggesting that numerical simulations may be used as a design tool for field-scale applications of pore-water extraction.

Oostrom, Martinus; Truex, Michael J.; Wietsma, Thomas W.; Tartakovsky, Guzel D.

2014-08-15T23:59:59.000Z

291

Yucca Mountain Project Document Suspension, OAS-M-08-07 | Department of  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain Project Document Suspension, OAS-M-08-07 Yucca Mountain Project Document Suspension, OAS-M-08-07 Yucca Mountain Project Document Suspension, OAS-M-08-07 The Department or Energy's Office of Civilian Radioaztivc Waste Management (OCRWM) is preparing to obtain a license from the Nuclear Regulatory Commission to construct a permanent repository at Yucca Mountain for the disposal of high-level radioactive waste and spent nuclear fuel. In December 2005, OCRWM identified design process inadequacies and suspended the appro\lal of new7 documents 'important to waste isolation' or safety analysis that were subject to quality assurance procedures. Waste isolation refers to limiting radioactive exposure to the public after the waste is placed in the repository; while safety refers to limiting exposure prior to

292

Statement from Ward Sproat on Yucca Mountain, Director of the Office of  

Broader source: Energy.gov (indexed) [DOE]

Ward Sproat on Yucca Mountain, Director of the Ward Sproat on Yucca Mountain, Director of the Office of Civilian Radioactive Waste Management Statement from Ward Sproat on Yucca Mountain, Director of the Office of Civilian Radioactive Waste Management December 12, 2007 - 4:44pm Addthis "We are pleased with the Nuclear Regulatory Commission's (NRC) Pre-license Application Presiding Officer Board's ruling today to uphold DOE's Licensing Support Network (LSN) certification. This enables DOE to move forward as planned and to submit a high quality license application for the Yucca Mountain repository to the NRC by no later than June 30, 2008. DOE has made electronically available on the NRC's LSN over 3.5 million documents, estimated to exceed 30 million pages. Through the LSN, the public can view scientific data, geologic and engineering studies, and

293

Yucca Mountain - U.S. Department of Energy's Reply to the Responses to the  

Broader source: Energy.gov (indexed) [DOE]

U.S. Department of Energy's Reply to the Responses U.S. Department of Energy's Reply to the Responses to the Motion to Withdraw Yucca Mountain - U.S. Department of Energy's Reply to the Responses to the Motion to Withdraw Department of Energy's reply brief in support of its motion to withdraw its license application to construct a high-level waste repository at Yucca Mountain, Nevada; administrative proceeding before the NRC's Atomic Safety and Licensing Board. Yucca Mountain - U.S. Department of Energy's Reply to the Responses to the Motion to Withdraw More Documents & Publications U.S. DEPARTMENT OF ENERGY'S REPLY BRIEF IN SUPPORT OF REVIEW AND REVERSAL OF THE BOARD'S RULING ON THE MOTION TO WITHDRAW Yucca Mountain - U.S. Department of Energy's Brief in Support of Review and Reversal of the Board's Ruling on the Motion to Withdraw

294

DOE Does Not Oppose Petitions to Intervene in Yucca Mountain NRC Proceeding  

Broader source: Energy.gov (indexed) [DOE]

DOE Does Not Oppose Petitions to Intervene in Yucca Mountain NRC DOE Does Not Oppose Petitions to Intervene in Yucca Mountain NRC Proceeding DOE Does Not Oppose Petitions to Intervene in Yucca Mountain NRC Proceeding March 30, 2010 - 9:57am Addthis The U.S. Department of Energy yesterday filed with the Nuclear Regulatory Commission a response to Petitions to Intervene filed by several parties seeking to oppose the Department's motion to withdraw its license application for a nuclear waste repository at Yucca Mountain. DOE said it is confident that its motion to withdraw the application is lawful, but that it believes the petitioning parties should be allowed to present their views to the NRC. It thus did not oppose the motions to intervene, and proposed a schedule for resolving the dispute over the Department's motion to withdraw the application. The parties seeking to intervene are

295

Yucca Mountain Project Document Suspension, OAS-M-08-07 | Department of  

Broader source: Energy.gov (indexed) [DOE]

Yucca Mountain Project Document Suspension, OAS-M-08-07 Yucca Mountain Project Document Suspension, OAS-M-08-07 Yucca Mountain Project Document Suspension, OAS-M-08-07 The Department or Energy's Office of Civilian Radioaztivc Waste Management (OCRWM) is preparing to obtain a license from the Nuclear Regulatory Commission to construct a permanent repository at Yucca Mountain for the disposal of high-level radioactive waste and spent nuclear fuel. In December 2005, OCRWM identified design process inadequacies and suspended the appro\lal of new7 documents 'important to waste isolation' or safety analysis that were subject to quality assurance procedures. Waste isolation refers to limiting radioactive exposure to the public after the waste is placed in the repository; while safety refers to limiting exposure prior to

296

Interpretive geophysical fault map across the central block of Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Geophysical data collected along 29 traverses across the central block of Yucca Mountain in southwest Nevada reveal anomalies associated with known fault sand indicate a number of possible concealed faults beneath the eastern flank of Yucca Mountain. Geophysical interpretations indicate that Midway Valley is characterized by several known and previously unknown faults, that the existence of the Yucca Wash fault is equivocal, and that the central part of the eastern flank of Yucca Mountain is characterized by numerous low-amplitude anomalies that probably reflect numerous small-scale faults. Gravity and magnetic data also reveal several large-amplitude anomalies that reflect larger-scale faulting along the margins of the central block.

Ponce, D.A.

1996-12-31T23:59:59.000Z

297

Dynamic and cyclic properties in shear of tuff specimens from Yucca Mountain, Nevada.  

E-Print Network [OSTI]

??Yucca Mountain was designated as the proposed high-level radioactive waste repository by the U.S. Government in 1987. The proposed repository design requires high safety for… (more)

Jeon, Seong Yeol, 1972-

2012-01-01T23:59:59.000Z

298

Remarks by Rick McLeod Yucca Mountain Blue Ribbon Panel  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Rick McLeod Yucca Mountain Blue Ribbon Panel Executive Director March 25, 2010 Savannah River Site Community Reuse Organization 1 GOOD MORNING. I AM RICK MCLEOD...EXECUTIVE...

299

Brush Busters: How to take the Luck out of Controlling Yucca  

E-Print Network [OSTI]

Two effective methods of controlling yucca on rangeland are described in this publication. One method uses a spray mixture of herbicide and oil. The second method uses undiluted herbicide. Proper procedures for each method are discussed....

McGinty, Allan; Ueckert, Darrell

2004-12-22T23:59:59.000Z

300

E-Print Network 3.0 - ash-flow tuff yucca Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by Explorit Topic List Advanced Search Sample search results for: ash-flow tuff yucca Page: << < 1 2 3 4 5 > >> 1 Journal of Volcanology and Geothermal Research, 27 (1986)...

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Modeling Alloy 22 general corrosion in the Yucca Mountain nuclear waste repository  

Science Journals Connector (OSTI)

This paper presents the general corrosion model used by the Yucca Mountain Project to account for general corrosion degradation of the Alloy 22 waste package outer barrier. The general corrosion rates were det...

Kevin G. Mon; Brvan E. Bullard; Fred Hua; Gopal C. De

2008-01-01T23:59:59.000Z

302

An analysis of the connectivity of two-dimensional fracture patterns at Yucca Mountain, Nevada  

E-Print Network [OSTI]

AN ANALYSIS OF THE CONNECTIVITY OF TWO-DIMENSIONAL FRACTURE PATTERNS AT YUCCA MOUNTAIN, NEVADA A Thesis by HANS WOLFGANG MEINARDUS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1991 Major Subject: Geology AN ANALYSIS OF THE CONNECTIVITY OF TWO-DIMENSIONAL FRACTURE PATTERNS AT YUCCA MOUNTAIN, NEVADA A Thesis by HANS WOLFGANG MEINARDUS Approved as to style and content by: Patrick A...

Meinardus, Hans Wolfgang

2012-06-07T23:59:59.000Z

303

MISTY ECHO Tunnel Dynamics Experiment--Data report: Volume 1; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

Tunnel damage resulting from seismic loading is an important issue for the Yucca Mountain nuclear waste repository. The tunnel dynamics experiment was designed to obtain and document ground motions, permanent displacements, observable changes in fracture patterns, and visible damage at ground motion levels of interest to the Yucca Mountain Project. Even though the maximum free-field loading on this tunnel was 28 g, the damage observed was minor. Fielding details, data obtained, and supporting documentation are reported.

Phillips, J.S.; Luke, B.A.; Long, J.W.; Lee, J.G.

1992-04-01T23:59:59.000Z

304

Three-year movement patterns of adult desert tortoises at Yucca Mountain  

SciTech Connect (OSTI)

We studied the home-range size and site fidelity of adult desert tortoises (Gopherus agassizii) at Yucca Mountain, Nevada, during 1992-1994. Of 67 adult tortoises monitored at Yucca Mountain during this period, we evaluated the movements of 22 female and 16 male radiomarked tortoises that were located >50 times during each of the 1992, 1993, and 1994 activity seasons. We measured annual and three-year home range sizes by either 100% minimum convex polygon (MCP) or by 95% cluster.

Holt, E.A.; Rautenstrauch, K.R.

1995-12-31T23:59:59.000Z

305

Technical Data Catalog: Yucca Mountain Site Characterization Project. Quarterly supplement  

SciTech Connect (OSTI)

This report presents reference information contained in the Yucca Mountain Project Automated Technical Data Tracking System. The Department of Energy is seeking to design and maintain a geologic repository for the disposal of high-level radioactive wastes. However, before this repository can be built, the DOE must first do a comprehensive site evaluation. This evaluation is subject to many regulations. This report fulfills the reporting requirements of the Site-Specific Procedural Agreement for Geologic Repository to develop and maintain a catalog of data which will be updated and provided to the Nuclear Regulatory Commission on a quarterly basis. This catalog contains: description of data; time, place, and method of acquisition; and where data may be examined.

NONE

1995-06-30T23:59:59.000Z

306

Design considerations for the Yucca Mountain project exploratory shaft facility  

SciTech Connect (OSTI)

This paper reports on the regulatory/requirements challenges of this project which exist because this is the first facility of its kind to ever be planned, characterized, designed, and built under the purview of a U.S. Nuclear Regulatory Agency. The regulations and requirements that flow down to the Architect/Engineer (A/E) for development of the Exploratory Shaft Facility (ESF) design are voluminous and unique to this project. The subsurface design and construction of the ESF underground facility may eventually become a part of the future repository facility and, if so, will require licensing by the Nuclear Regulatory Commission (NRC). The Fenix and Scisson of Nevada-Yucca Mountain Project (FSN-YMP) group believes that all of the UMP design and construction related activities, with good design/construct control, can be performed to meet all engineering requirements, while following a strict quality assurance program that will also meet regulatory requirements.

Bullock, R.L. Sr. [Fenix and Scisson of Nevada, NV (US)

1990-12-31T23:59:59.000Z

307

Illuminating the Decision Path: The Yucca Mountain Site Recommendation  

SciTech Connect (OSTI)

On February 14, 2002, U.S. Secretary of Energy Spencer Abraham provided to the President the ''Recommendation by the Secretary of Energy Regarding the Suitability of the Yucca Mountain Site for a Repository Under the Nuclear Waste Policy Act of 1982.'' This Recommendation, along with supporting materials, complied with statutory requirements for communicating a site recommendation to the President, and it did more: in 49 pages, the Recommendation also spoke directly to the Nation, illuminating the methodology and considerations that led toward the decision to recommend the site. Addressing technical suitability, national interests, and public concerns, the Recommendation helped the public understand the potential risks and benefits of repository development and placed those risks and benefits in a meaningful national context.

Knox, E.; Slothouber, L.

2003-02-25T23:59:59.000Z

308

Geologic and hydrologic investigations of a potential nuclear waste disposal site at Yucca Mountain, southern Nevada  

SciTech Connect (OSTI)

Yucca Mountain in southern Nye County, Nevada, has been selected by the United States Department of Energy as one of three potential sites for the nation`s first high-level nuclear waste repository. Its deep water table, closed-basin ground-water flow, potentially favorable host rock, and sparse population have made the Yucca Mountain area a viable candidate during the search for a nuclear waste disposal site. Yucca Mountain, however, lies within the southern Great Basin, a region of known contemporary tectonism and young volcanic activity, and the characterization of tectonism and volcanism remains as a fundamental problem for the Yucca Mountain site. The United States Geological Survey has been conducting extensive studies to evaluate the geologic setting of Yucca Mountain, as well as the timing and rates of tectonic and volcanic activity in the region. A workshop was convened by the Geologic Survey in Denver, Colorado, on August 19, 20, and 21, 1985, to review the scientific progress and direction of these studies. Considerable debate resulted. This collection of papers represents the results of some of the studies presented at the workshop, but by no means covers all of the scientific results and viewpoints presented. Rather, the volume is meant to serve as a progress report on some of the studies within the Geological Survey`s continuing research program toward characterizing the tectonic framework of Yucca Mountain. Individual papers were processed separately for the data base.

Carr, M.D.; Yount, J.C. (eds.)

1988-12-31T23:59:59.000Z

309

Yucca Mountain project canister material corrosion studies as applied to the electrometallurgical treatment metallic waste form  

SciTech Connect (OSTI)

Yucca Mountain, Nevada is currently being evaluated as a potential site for a geologic repository. As part of the repository assessment activities, candidate materials are being tested for possible use as construction materials for waste package containers. A large portion of this testing effort is focused on determining the long range corrosion properties, in a Yucca Mountain environment, for those materials being considered. Along similar lines, Argonne National Laboratory is testing a metallic alloy waste form that also is scheduled for disposal in a geologic repository, like Yucca Mountain. Due to the fact that Argonne`s waste form will require performance testing for an environment similar to what Yucca Mountain canister materials will require, this report was constructed to focus on the types of tests that have been conducted on candidate Yucca Mountain canister materials along with some of the results from these tests. Additionally, this report will discuss testing of Argonne`s metal waste form in light of the Yucca Mountain activities.

Keiser, D.D.

1996-11-01T23:59:59.000Z

310

Dialogs on the Yucca Mountain controversy. Special report No. 5  

SciTech Connect (OSTI)

The recent, 1992, report prepared by the Panel on Coupled Hydrologic/Tectonic/Hydrothermal Systems at Yucca Mountain for the National Research Council of the National Academy of Sciences, entitled Ground Water at Yucca Mountain: How High Can It Rise? has generated critical reviews by Somerville et al. (1992) and by Archambeau (1992). These reviews were submitted as reports to the Nuclear Waste Project Office, State of Nevada by Technology and Resource Assessment Corporation under Contract No. 92/94.0004. A copy of the review report by C. B. Archambeau was also sent to Dr. Frank Press, President of the National Academy of Sciences, along with a cover letter from Dr. Archambeau expressing his concerns with the NRC report and his suggestion that the Academy President consider a re-evaluation of the issues covered by the NRC report. Dr. Press responded in a letter to Dr. Archambeau in February of this year which stated that, based on his staff recommendations and a review report by Dr. J. F. Evernden of the United States Geological Survey, he declined to initiate any further investigations and that, in his view, the NRC report was a valid scientific evaluation which was corroborated by Evernden`s report. He also enclosed, with his letter, a copy of the report he received from his staff. In March of this year Dr. Archambeau replied to the letter and NRC staff report sent by Dr. Press with a detailed point-by-point rebuttal of the NRC staff report to Press. Also, in March, a critical review of Dr. Evernden`s report by M. Somerville was submitted to the Nuclear Waste Project Office of the State of Nevada and this report, along with the earlier review of the NRC report by Somerville et al., was included as attachments to the letter sent to Dr. Press.

Archambeau, C.B.; Szymanski, J.S.

1993-03-01T23:59:59.000Z

311

Constructing the Exploratory Studies Facility at Yucca Mountain  

SciTech Connect (OSTI)

Yucca Mountain Site Characterization Office of the US Department of Energy (DOE) is constructing an underground Exploratory Studies Facility (ESF), approximately 160 km (100 miles) northwest of Las Vegas, Nevada. This facility is being used to obtain geological, hydrological, geomechanical, thermomechanical and geochemical information to characterize, Yucca Mountain as a potential site to isolate High-Level Radioactive Waste from the accessible environment. The ESF, when completed, will consist of two ramps from surface (North and South ramp) to the potential repository horizon formations, a drift connecting the two ramps, test alcoves, and above and below ground operational support facilities. The ramps and connecting drift are being mined by a 7.62 m (25 ft) diameter, fully shielded, Tunnel Boring Machine (TBM). This paper describes the current status of the construction of the ESF and test alcoves. At the time of this writing, the following has been accomplished: North Ramp excavation is complete; four test alcoves have been excavated and are in use for scientific experiments; the excavation has reached the potential repository horizon; the drift connecting the two ramps is being excavated, and the excavation of a test alcove for thermal testing is in progress. The mining operations are ahead of schedule, and to date March 26, 1996, the TBM has excavated over 4623 m(15,160 ft.) without any major breakdowns or accidents. The average advance for a three shift (two mining shifts) production day has been 33.46 m (110 ft.). Maximum advance for a week was 218.3 m (716 ft.). An Alpine Miner (AM 75) roadheader is being used to excavate test alcoves. The major ground support system consists of Supper Swellex rock bolts, steel sets as required, Williams rock bolts and channels, and welded wire fabric. Various sections of the tunnel have been instrumented, and the entire excavation has been geologically mapped. To date, the site conditions have been those predicted.

Kalia, H.N. [Los Alamos National Lab., NM (United States); Replogle, J.M. [USDOE Yucca Mountain Site Characterization Project Office, Las Vegas, NV (United States)

1996-05-01T23:59:59.000Z

312

Preliminary stratigraphic and petrologic characterization of core samples from USW-G1, Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Tuffs of the Nevada Test Site are currently under investigation to determine their potential for long-term storage of radioactive waste. As part of this program, hole USW-G1 was drilled to a depth of 6000 ft below the surface, in the central part of the Yucca Mountain area, Nevada Test Site, Nevada. Petrographic study of the USW-G1 core is presented in this report and shows the tuffs (which generally were variably welded ash flows) are partly recrystallized to a variety of secondary minerals. The important alteration products are zeolites (heulandite, clinoptilolite, mordenite and analcime), smectite clays with minor interstratified illite, albite, micas, potassium feldspar, and various forms of silica. Iijima`s zeolite zones I through IV of burial metamorphism can be recognized in the core. Zeolites are first observed at about the 1300-ft depth, and the high-temperature boundary of zeolite stability in this core occurs at about 4350 ft. Analcime persists, either metastably or as a retrograde mineral, deeper in the core. The oxidation state of Fe-Ti oxide minerals, through most of the core, increases as the degree of welding decreases, but towards the bottom of the hole, reducing conditions generally prevail. Four stratigraphic units transected by the core may be potentially favorable sites for a waste repository. These four units, in order of increasing depth in the core, are (1) the lower cooling unit of the Topopah Spring Member, (2) cooling unit II of the Bullfrog Member, (3) the upper part of the Tram tuff, and (4) the Lithic-rich tuff.

Waters, A.C.; Carroll, P.R. (eds.)

1981-11-01T23:59:59.000Z

313

Total System Performance Assessment Code (TOSPAC); Volume 2, User`s guide: Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

TOSPAC is a computer program that calculates partially saturated groundwater flow with the transport of water-soluble contaminants. TOSPAC Version 1 is restricted to calculations involving one-dimensional, vertical columns of one or more media. TOSPAC was developed to help answer questions surrounding the burial of toxic wastes in arid regions. Burial of wastes in arid regions is attractive because of generally low population densities and little groundwater flow, in the unsaturated zone, to disturb the waste. TOSPAC helps to quantify groundwater flow and the spread of contamination, offering an idea of what could happen in the distant future. Figure 1.1 illustrates the problem TOSPAC was designed to investigate. For groundwater flow, TOSPAC can provide saturations, velocities, and and travel tunes for water in the rock matrix or the fractures in the unsaturated zone. TOSPAC can determine how hydrologic conditions vary when the rate of infiltration changes. For contaminant transport, TOSPAC can compute how much of a contaminant is dissolved in the water and how it is distributed. TOSPAC can determine how fast the solute is moving and the shape of the concentration front. And TOSPAC can be used to investigate how much of the contaminant remains in the inventory of a repository, how much is adsorbed onto the soil or rock matrix, and how much reaches the water table. Effective use of TOSPAC requires knowledge in a number of diverse disciplines, including real groundwater flow and transport, the mathematical models of groundwater flow and transport, real-world data required for the models, and the numerical solution of differential equations. Equally important is a realization of the limitations intrinsic to a computer model of complex physical phenomena. This User`s Guide not only describes the mechanics of executing TOSPAC on a computer, but also examines these other topics.

Gauthier, J.H.; Dudley, A.L; Skinner, L.H. [Spectra Research Inst., Albuquerque, NM (United States); Wilson, M.L.; Peters, R.R. [Sandia National Labs., Albuquerque, NM (United States)

1992-07-01T23:59:59.000Z

314

Quantifying Transport Uncertainty in Unsaturated Rock using Monte Carlo Sampling of Retention Curves  

Science Journals Connector (OSTI)

...Laboratory, under funding from the U.S...National Laboratory Disposal Area G. Rep...moisture through disposal units at Los Alamos...Geology of the Jemez Mountains Region II. Fall...alluvial aquifer near Yucca Mountain, Nevada. Ground...

Philip H. Stauffer; Zhiming Lu

315

Preclosure radiological safety analysis for accident conditions of the potential Yucca Mountain Repository: Underground facilities; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

This preliminary preclosure radiological safety analysis assesses the scenarios, probabilities, and potential radiological consequences associated with postulated accidents in the underground facility of the potential Yucca Mountain repository. The analysis follows a probabilistic-risk-assessment approach. Twenty-one event trees resulting in 129 accident scenarios are developed. Most of the scenarios have estimated annual probabilities ranging from 10{sup {minus}11}/yr to 10{sup {minus}5}/yr. The study identifies 33 scenarios that could result in offsite doses over 50 mrem and that have annual probabilities greater than 10{sup {minus}9}/yr. The largest offsite dose is calculated to be 220 mrem, which is less than the 500 mrem value used to define items important to safety in 10 CFR 60. The study does not address an estimate of uncertainties, therefore conclusions or decisions made as a result of this report should be made with caution.

Ma, C.W.; Sit, R.C.; Zavoshy, S.J.; Jardine, L.J. [Bechtel National, Inc., San Francisco, CA (United States); Laub, T.W. [Sandia National Labs., Albuquerque, NM (United States)

1992-06-01T23:59:59.000Z

316

Strontium and cesium release mechanisms during unsaturated flow through waste-weathered Hanford sediments  

SciTech Connect (OSTI)

Leaching behavior of Sr and Cs in the vadose zone of Hanford site (WA, USA) was studied with laboratory-weathered sediments mimicking realistic conditions beneath the leaking radioactive waste storage tanks. Unsaturated column leaching experiments were conducted using background Hanford pore water focused on first 200 pore volumes. The weathered sediments were prepared by 6 months reaction with a synthetic Hanford tank waste leachate containing Sr and Cs (10-5 and 10-3 molal representative of LO- and HI-sediment, respectively) as surrogates for 90Sr and 137Cs. The mineral composition of the weathered sediments showed that zeolite (chabazite-type) and feldspathoid (sodalite-type) were the major byproducts but different contents depending on the weathering conditions. Reactive transport modeling indicated that Cs leaching was controlled by ion-exchange, while Sr release was affected primarily by dissolution of the secondary minerals. The later release of K, Al, and Si from the HI-column indicated the additional dissolution of a more crystalline mineral (cancrinite-type). A two-site ion-exchange model successfully simulated the Cs release from the LO-column. However, a three-site ion-exchange model was needed for the HI-column. The study implied that the weathering conditions greatly impact the speciation of the secondary minerals and leaching behavior of sequestrated Sr and Cs.

Chang, Hyun-Shik; Um, Wooyong; Rod, Kenton A.; Serne, R. Jeffrey; Thompson, Aaron; Perdrial, Nicolas; Steefel, Carl I.; Chorover, Jon

2011-10-01T23:59:59.000Z

317

Major results of geophysical investigations at Yucca Mountain and vicinity, southern Nevada  

SciTech Connect (OSTI)

In the consideration of Yucca Mountain as a possible site for storing high level nuclear waste, a number of geologic concerns have been suggested for study by the National Academy of Sciences which include: (1) natural geologic and geochemical barriers, (2) possible future fluctuations in the water table that might flood a mined underground repository, (3) tectonic stability, and (4) considerations of shaking such as might be caused by nearby earthquakes or possible volcanic eruptions. This volume represents the third part of an overall plan of geophysical investigation of Yucca Mountain, preceded by the Site Characterization Plan (SCP; dated 1988) and the report referred to as the Geophysical White Paper, Phase 1, entitled Status of Data, Major Results, and Plans for Geophysical Activities, Yucca Mountain Project (Oliver and others, 1990). The SCP necessarily contained uncertainty about applicability and accuracy of methods then untried in the Yucca Mountain volcano-tectonic setting, and the White Paper, Phase 1, focused on summarization of survey coverage, data quality, and applicability of results. For the most part, it did not present data or interpretation. The important distinction of the current volume lies in presentation of data, results, and interpretations of selected geophysical methods used in characterization activities at Yucca Mountain. Chapters are included on the following: gravity investigations; magnetic investigations; regional magnetotelluric investigations; seismic refraction investigations; seismic reflection investigations; teleseismic investigations; regional thermal setting; stress measurements; and integration of methods and conclusions. 8 refs., 60 figs., 2 tabs.

Oliver, H.W.; Ponce, D.A. [eds.] [Geological Survey, Menlo Park, CA (United States); Hunter, W.C. [ed.] [Geological Survey, Denver, CO (United States). Yucca Mountain Project Branch

1995-12-31T23:59:59.000Z

318

Expert judgment in assessing radwaste risks: What Nevadans should know about Yucca Mountain; [Final report  

SciTech Connect (OSTI)

For phenomena characterized by accurate and largely complete data, quantitative risk assessment (QRA) provides extraordinarily valuable and objective information. However, with phenomena for which the data, models, or probabilities are incomplete or uncertain, QRA may be less useful and more questionable, because its conclusions are typically empirically and theoretically underdetermined. In the face of empirical or theoretical underdetermination, scientists often are forced to make a number of methodological value judgments and inferences about how to estimate and evaluate the associated risks. The purpose of this project is to evaluate instances of methodological value judgments and invalid or imprecise inferences that have occurred in the QRA done for the proposed Yucca Mountain high-level radioactive waste facility. We shall show (1) that questionable methodological value judgments and inferences have occurred in some Yucca Mountain QRA`S; (2) that questionable judgments and inferences, similar to those in the Yucca Mountain studies, have occurred in previous QRA`s done for other radiation-related facilities and have likely caused earlier QRA`s to err in specific ways; and (3) that, because the value judgments and problems associated with some Yucca Mountain QRA`s include repetitions of similar difficulties in earlier studies, therefore the QRA conclusions of some Yucca Mountain analyses are, at best, uncertain.

Shrader-Frechette, K. [University of South Florida, Tampa, FL (United States)

1992-06-01T23:59:59.000Z

319

Sequential evaluation of the potential geologic repository site at Yucca Mountain, Nevada, USA  

SciTech Connect (OSTI)

This paper discusses the changes that are planned for the characterization program at Yucca Mountain due to budget changes. Yucca Mountain is the only site being studied in the US for a geologic repository. Funding for the site characterization program at Yucca Mountain program was cut by roughly one half from the 1994 projected budget to complete three major milestones. These project milestones included: (1) a time-phased determination of site suitability, and if a positive finding, (2) completion of an Environmental Impact Statement, and (3) preparation of a License Application to the US NRC to authorize repository construction. In reaction, Yucca Mountain Site Characterization Project has shifted from parallel development of these milestones to a sequenced approach with the site suitability evaluation being replaced with a management assessment. Changes to the regulatory structure for the disposal program are under consideration by DOE and the NRC. The possibility for NRC and Doe to develop a site-specific regulatory structure follows from the National Energy Policy Act of 1992 that authorized the US EPA to develop a site specific environmental standard for Yucca Mountain.

Bjerstedt, T.W.

1996-12-31T23:59:59.000Z

320

Water levels in the Yucca Mountain area, Nevada, 1995  

SciTech Connect (OSTI)

Water levels were monitored in 28 wells in the Yucca Mountain area, Nevada, during 1995. Seventeen wells representing 18 depth intervals were monitored periodically, generally on a monthly basis, 2 wells representing 3 depth intervals were monitored hourly, and 9 wells representing 15 depth intervals were monitored both periodically and hourly. All wells monitor water levels in Tertiary volcanic rocks except one that monitors water levels in Paleozoic carbonate rocks. Water levels were measured using calibrated steel tapes, a multiconductor cable unit, and/or pressure transducers. Mean water-level altitudes in the Tertiary volcanic rocks ranged from about 728 to about 1,034 meters above sea level during 1995. The mean water-level altitude in the well monitoring the Paleozoic carbonate rocks was about 753 meters above sea level during 1995. Mean water level altitudes were only an average of about 0.01 meters higher than 1994 mean water level altitudes. A single-well aquifer test was conducted on well UE-25 WT{number_sign}12 during August and September 1995. Well USW 0-2 was also pumped during October and November 1995, in preparation for single-well aquifer test at that well. All data were acquired in accordance with a quality-assurance program to support the reliability of the data.

Graves, R.P.; Goemaat, R.L.

1998-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Yucca Mountain Site Characterization Project technical data catalog quarterly supplement  

SciTech Connect (OSTI)

The Department of Energy (DOE)/Nuclear Regulatory Commission (NRC) Site-Specific Procedural Agreement for Geologic Repository Site Investigation and Characterization Program requires the DOE to develop and maintain a catalog of data which will be updated and provided to the NRC at least quarterly. This catalog is to include a description of the data; the time (date), place, and method of acquisition; and where the data may be examined. The Yucca Mountain Site Characterization Project (YMP) Technical Data Catalog is published and distributed in accordance with t requirements of the Site-Specific Agreement. The YMP Technical Data Catalog is a report based on reference information contained in the YMP Automated Technical Data Tracking System (ATDT). The reference information is provided by Participants for data acquired or developed in support of the YMP. The Technical Data Catalog is updated quarterly and distributed in the month following the end of each quarter. A complete revision to the catalog is published at the end of each fiscal year. Supplements to the end-of-year edition are published each quarter. These supplements provide information related to new data items not included in previous quarterly updates and data items affected by changes to@ previously published reference information. The Technical Data Catalog, dated September 30, 1994, should be retained as the baseline document for the supplements until the end-of-year revision is published and distributed in October 1995.

NONE

1995-03-31T23:59:59.000Z

322

Yucca Mountain Site Characterization Project technical data catalog: Quarterly supplement  

SciTech Connect (OSTI)

The Department of Energy (DOE)/Nuclear Regulatory Commission (NRC) Site-Specific Procedural Agreement for Geologic Repository Site Investigation and Characterization Program requires the DOE to develop and maintain a catalog of data which will be updated and provided to the NRC at least quarterly. This catalog is to include a description of the data; the time (date), place, and method of acquisition; and where the data may be examined. The Yucca Mountain Site Characterization Project (YMP) Technical Data Catalog is published and distributed-in accordance with the requirements of the Site-Specific Agreement. The YMP Technical Data Catalog is a report based on reference information contained in the YMP Automated Technical Data Tracking System (ATDT). The reference information is provided by Participants for data acquired or developed in support of the YMP. The Technical Data Catalog is updated quarterly and distributed in the month following the end of each quarter. A complete revision to the catalog is published at the end of each fiscal year. Supplements to the end-of-year edition are published each quarter. These supplements provide information related to new data items not included in previous quarterly updates and data items affected by changes to previously published reference information. The Technical Data Catalog, dated September 30, 1994, should be retained as the baseline document for the supplements until the end-of-year revision is published and distributed in October 1995.

NONE

1994-12-31T23:59:59.000Z

323

Yucca Mountain Project - Science & Technology Radionuclide Absorbers Development Program Overview  

SciTech Connect (OSTI)

The proposed Yucca Mountain repository is anticipated to be the first facility for long-term disposal of commercial spent nuclear fuel and high-level radioactive waste in the United States. The facility, located in the southern Nevada desert, is currently in the planning stages with initial exploratory excavations completed. It is an underground facility mined into the tuffaceous volcanic rocks that sit above the local water table. The focus of the work described in this paper is the development of radionuclide absorbers or ''getter'' materials for neptunium (Np), iodine (I), and technetium (Tc) for potential deployment in the repository. ''Getter'' materials retard the migration of radionuclides through sorption, reduction, or other chemical and physical processes, thereby slowing or preventing the release and transport of radionuclides. An overview of the objectives and approaches utilized in this work with respect to materials selection and modeling of ion ''getters'' is presented. The benefits of the ''getter'' development program to the United States Department of Energy (US DOE) are outlined.

Hong-Nian Jow; R.C. Moore; K.B. Helean; S. Mattigod; M. Hochella; A.R. Felmy; J. Liu; K. Rosso; G. Fryxell; J. Krumhansl; Y. Wang

2005-01-14T23:59:59.000Z

324

Using seals to control flow at Yucca Mountain  

SciTech Connect (OSTI)

This paper describes how an interpretation of regulations can lead to innovative solutions to the problem of sealing subsurface openings in the highly fractured rock above the water table at Yucca Mountain, Nevada, which is being characterized to determine its suitability for a repository for spent fuel and high level waste. The paper concentrates on the functional requirements for seals as well as the statutory definitions given in 10 CFR Part 60. Because the main concern of sealing is to prevent the flow of water to the waste packages or radionuclides to the accessible environment, the main strategy for sealing of the proposed repository is to control rather than stop the flow of water. Other functions of seals include the prevention of human intrusion and the control of the flow of gaseous radionuclides. This paper describes the concepts that have thus far been developed for sealing with respect to shafts, ramps, boreholes, and the underground facility rather than detailed numerical analysis and design for seals. The main emphasis of this paper is on the role of regulations in providing flexibility in dealing with a complex, long-term component.

Blair, J.A. [TRW Environmental Safety Systems Inc., Washington, DC (US); Stucker, D.; Kumar, P. [USDOE Office of Civilian Radioactive Waste Management, Washington, DC (United States)

1992-11-01T23:59:59.000Z

325

Yucca Mountain Site Characterization Project: Technical Data Catalog quarterly supplement  

SciTech Connect (OSTI)

The March 21, 1993, Department of Energy (DOE)/Nuclear Regulatory Commission (NRC) Site-Specific Procedural Agreement for Geologic Repository Site Investigation and Characterization Program requires the DOE to develop and maintain a catalog of data which will be updated and provided to the NRC at least quarterly. This catalog is to include a description of the data; the time (date), place, and method of acquisition; and where it may be examined. The Yucca Mountain Site Characterization Project (YMP) Technical Data Catalog is published and distributed in accordance with the requirements of the Site-Specific Agreement. The YMP Technical Data Catalog is a report based on reference information contained in the YMP Automated Technical Data Tracking System (ATDT). The reference information is provided by Participants for data acquired or developed in support of the YMP. The Technical Data Catalog is updated quarterly and published in the month following the end of each quarter. A complete revision to the Catalog is published at the end of each fiscal year. Supplements to the end-of-year edition are published each quarter. These supplements provide information related to new data items not included in previous quarterly updates and data items affected by changes to previously published reference information. The Technical Data Catalog, dated September 30, 1993, should be retained as the baseline document for the supplements until the end-of-year revision is published and distributed in October 1994.

NONE

1994-03-31T23:59:59.000Z

326

Licensing A Geologic Repository At Yucca Mountain, Nevada  

SciTech Connect (OSTI)

After completing more than twenty years of intensive scientific and engineering investigations at the Yucca Mountain site in Nevada, the U.S. Department of Energy (DOE) has determined that the site is suitable for development of a geologic repository for disposal of the Nation's spent nuclear fuel and high-level radioactive waste. Following this determination, the site was recommended to the President for repository development. The President approved the recommendation and forwarded it to the U.S. Congress for site designation. The Governor of Nevada vetoed the recommendation with a notice of disapproval to the U.S. Congress. Congress subsequently over-rode the Governor's veto with a joint resolution which the President signed into law. With site designation in effect, DOE is now focusing its work on the development of a license application for repository construction. This paper will summarize the work that had been done to support site recommendation, work that is currently being done for license application, and the necessary next steps that may be required to allow repository operations to begin in 2010.

Dyer, R. J.

2003-02-24T23:59:59.000Z

327

The origin and history of alteration and carbonatization of the Yucca Mountain ignimbrites. Volume I  

SciTech Connect (OSTI)

This document contains Volume I of the report entitled The Origin and History of Alteration and Carbonatization of the Yucca Mountain Ignimbrites by Jerry S. Szymanski and a related correspondence with comments by Donald E. Livingston. In the Great Basin, the flow of terrestrial heat through the crust is affected in part by the flow of fluids. At Yucca Mountain, the role of fluids in crustal heat transport is manifested at the surface by youthful calcretes, sinters, bedrock veins, hydrothermal eruption breccias and hydrothermal alteration. This report discusses evidence for recent metasomatism high in the stratigraphic section at Yucca Mountain. Over the last several hundred years, episodes of calcite emplacement contemporaneous with local mafic volcanism have occurred at intervals that are not long in comparison with the isolation time required for a High-Level Radioactive Waste repository.

Szymanski, J.S.

1992-04-01T23:59:59.000Z

328

Yucca Mountain Project bibliography, January--June 1990; An update: Supplement 2, Add. 1  

SciTech Connect (OSTI)

Following a reorganization of the Office of Civilian Radioactive Waste Management, the Yucca Mountain Project was renamed Yucca Mountain Site Characterization Project. The title of this bibliography was also changed to Yucca Mountain Site Characterization Project Bibliography. Prior to August 5, 1988, this project was called the Nevada Nuclear Waste Storage Investigations. This bibliography contains information on this ongoing project that was added to the Department of Energy`s Energy Science and Technology Database from January 1990 through June 1990. The bibliography is categorized by principal project participating organization. Participant-sponsored subcontractor reports, papers, and articles are included in the sponsoring organization`s list. Another section contains information about publications on the Energy Science and Technology Database that were not sponsored by the project but have some relevance to it.

Lorenz, J.J. [ed.] [US DOE Nevada Operations Office, Las Vegas, NV (USA)

1990-10-01T23:59:59.000Z

329

Underground exploration and testing at Yucca Mountain: A report to Congress and the Secretary of Energy  

SciTech Connect (OSTI)

Underground exploration and testing are major components of the DOE`s site-characterization efforts at Yucca Mountain, Nevada. During the past four years, the DOE`s plans for exploration and testing in an underground facility have evolved substantially, and many improvements have been made. The report reviews the status of the DOE`s underground exploration and testing project at Yucca Mountain, Nevada; it suggests strategies to improve both the exploration and testing program and the approach to designing and excavating the exploratory facility. The Board makes several recommendations it believes will speed progress and improve cost-effectiveness. The Board believes the changes it is recommending can and should be made without slowing the momentum of important site-characterization activities currently under way at Yucca Mountain.

NONE

1993-10-01T23:59:59.000Z

330

Site characterization progress report: Yucca Mountain, Nevada, April 1, 1993--September 30, 1993, No. 9  

SciTech Connect (OSTI)

In accordance with requirements of Section 113(b)(3) of the Nuclear Waste Policy Act of 1982, as amended, and 10 CFR 60.18(g), the U.S. Department of Energy has prepared this report on the progress of site characterization activities at Yucca Mountain, Nevada, for the period April 1, 1993, through September 30, 1993. This report is the ninth in a series issued at intervals of approximately six months during site characterization of Yucca Mountain as a possible site for a geologic repository for the permanent disposal of high-level radioactive waste. Also included in this report are activities such as public outreach and international programs that are not formally part of the site characterization process. Information on these activities is provided to report on all aspects of the Yucca Mountain studies.

NONE

1994-02-01T23:59:59.000Z

331

Yucca Mountain Site Characterization Project bibliography, January--June 1995. Supplement 4, Add.3: An update  

SciTech Connect (OSTI)

Following a reorganization of the Office of Civilian Radioactive Waste Management in 1990, the Yucca Mountain Project was renamed Yucca Mountain Site Characterization Project. The title of this bibliography was also changed to Yucca Mountain Site Characterization Project Bibliography. Prior to August 5, 1988, this project was called the Nevada Nuclear Waste Storage Investigations. This bibliography contains information on this ongoing project that was added to the Department of Energy`s Energy Science and Technology Database from January 1, 1995, through June 30, 1995. The bibliography is categorized by principal project participating organization. Participant-sponsored subcontractor reports, papers, and articles are included in the sponsoring organization`s list. Another section contains information about publications on the Energy Science and Technology Database that were not sponsored by the project but have some relevance to it.

Stephan, P.M. [ed.

1996-01-01T23:59:59.000Z

332

Two Dimensional Polyamides Prepared From Unsaturated Carboxylic Acids And Amines.  

DOE Patents [OSTI]

A polyamide and a process for preparing the polyamide are disclosed. The process comprises reacting in a reaction mixture a monomer selected from unsaturated carboxylic acids, esters of unsaturated carboxylic acids, anhydrides of unsaturated carboxylic acids, and mixtures thereof, and a first amine to form an intermediate reaction product in the reaction mixture, wherein the first amine is selected from RR.sub.1 NH, RNH.sub.2, RR.sub.1 NH.sub.2.sup.+, RNH.sub.3.sup.+ and mixtures thereof, wherein R and R.sub.1 can be the same or different and each contain between about 1 and 50 carbon atoms and are optionally substituted with heteroatoms oxygen, nitrogen, sulfur, and phosphorus and combinations thereof, and reacting the intermediate reaction product and a second amine to form a polyamide, wherein the second amine is selected from R.sub.2 R.sub.3 NH, R.sub.2 NH.sub.2, R.sub.2 R.sub.3 NH.sub.2.sup.+, R.sub.2 NH.sub.3.sup.+ and mixtures thereof wherein R.sub.2 and R.sub.3 can be the same or different and each contain between about 1 and 50 carbon atoms and are optionally substituted with heteroatoms oxygen, nitrogen, sulfur, and phosphorus and combinations thereof, wherein multiple of the R, R.sub.1, R.sub.2, and R.sub.3 are in vertically aligned spaced relationship along a backbone formed by the polyamide. In one version of the invention, the monomer is selected from maleic anhydride, maleic acid esters, and mixtures thereof. In another version of the invention, the first amine is an alkylamine, such as tetradecylamine, and the second amine is a polyalkylene polyamine, such as pentaethylenehexamine. In yet another version of the invention, the first amine and the second amine are olefinic or acetylenic amines, such as the reaction products of an alkyldiamine and an acetylenic carboxylic acid. The first amine and the second amine may be the same or different depending on the desired polyamide polymer structure.

McDonald, William F. (Utica, OH); Huang, Zhi Heng (East Lansing, MI); Wright, Stacy C. (Lansing, MI); Danzig, Morris (Northbrook, IL); Taylor, Andrew C. (Ann Arbor, MI)

2002-07-17T23:59:59.000Z

333

Other Fresnel Zone Antennas  

Science Journals Connector (OSTI)

In the preceding chapters, theoretical investigations and experiments on a number of Fresnel zone antennas are presented. This chapter is intended to introduce a wider range of Fresnel zone antennas. Section 7...

Y. Jay Guo; Stephen K. Barton

2002-01-01T23:59:59.000Z

334

Enterprise Zone Program (Illinois)  

Broader source: Energy.gov [DOE]

The Enterprise Zone Program provides eligible businesses that relocate or expand to a designated zone with tax incentives such as: 1) an investment tax credit; 2) a job tax credit for each job...

335

Alternative Energy Zone (Ohio)  

Broader source: Energy.gov [DOE]

Ohio's Alternative Energy Zones are made possible through Ohio's Senate Bill 232, which reduced taxes on alternative energy projects. The Alternative Energy Zones are designated on a county-by...

336

Zoning and Permitting Resources  

Broader source: Energy.gov [DOE]

Zoning and permitting is commonly controlled by local governments and may be applicable to both residential and commercial properties.

337

Independent management and financial review, Yucca Mountain Project, Nevada. Final report  

SciTech Connect (OSTI)

The Yucca Mountain Project is one part of the Department of Energy`s Office of Civilian Radioactive Waste Management Program (the Program) which was established by the Nuclear Waste Policy Act of 1982, and as amended in 1987. The Program`s goal is to site the nation`s first geologic repository for the permanent disposal of high-level nuclear waste, in the form of spent fuel rod assemblies, generated by the nuclear power industry and a smaller quantity of Government radioactive waste. The Program, which also encompasses the transportation system and the multipurpose canister system was not the subject of this Report. The subject of this Review was only the Yucca Mountain Project in Nevada. While the Review was directed toward the Yucca Mountain Project rather than the Program as a whole, there are certain elements of the Project which cannot be addressed except through discussion of some Program issues. An example is the Total System Life Cycle Cost addressed in Section 7 of this report. Where Program issues are discussed in this Report, the reader is reminded of the scope limitations of the National Association of Regulatory Utility Commissioners (NARUC) contract to review only the Yucca Mountain Project. The primary scope of the Review was to respond to the specific criteria contained in the NARUC scope of work. In responding to these criteria, the Review Team understood that some interested parties have expressed concern over the requirements of the Nuclear Waste Policy Act relative to the Yucca Mountain Project and the nature of activities currently being carried out by the Department of Energy at the Yucca Mountain Project site. The Review Team has attempted to analyze relevant portions of the Nuclear Waste Policy Act as Amended, but has not conducted a thorough analysis of this legislation that could lead to any specific legal conclusions about all aspects of it.

NONE

1995-07-15T23:59:59.000Z

338

Microsoft Word - IG-0708 -Yucca Rpt- FINAL Nov 10-05.doc  

Broader source: Energy.gov (indexed) [DOE]

F F U.S. Department of Energy Office of Inspector General Office of Inspections and Special Inquiries Inspection Report Quality Assurance Weaknesses in the Review of Yucca Mountain Electronic Mail for Relevancy to the Licensing Process DOE/IG-0708 November 2005 QUALITY ASSURANCE WEAKNESSES IN THE REVIEW OF YUCCA MOUNTAIN ELECTRONIC MAIL FOR RELEVANCY TO THE LICENSING PROCESS TABLE OF CONTENTS OVERVIEW Introduction and Objectives...................................... 1 Observations and Conclusions.................................. 2 DETAILS OF FINDINGS Review of E-mails for Inclusion in the LSN.................. 4 Possible Conditions Adverse to Quality...................... 6

339

Site environmental report for calendar year 1996: Yucca Mountain site, Nye County, Nevada  

SciTech Connect (OSTI)

The environmental program established by the Yucca Mountain Site Characterization Office (YMSCO) has been designed and implemented to protect, maintain, and restore environmental quality, minimize potential threats to the environment and the public, and comply with environmental policies and US Department of Energy (DOE) Orders. In accordance with DOE Order 5400.1, General Environmental Protection Program (DOE, 1990a), to be superseded by DOE Order 231.1 (under review), the status of the Yucca Mountain Site Characterization Project (YMP) environmental program has been summarized in this annual Site Environmental Report (SER) to characterize performance, document compliance with environmental requirements, and highlight significant programs and efforts during calendar year 1996.

NONE

1997-11-01T23:59:59.000Z

340

Los Alamos National Laboratory Yucca Mountain Project publications (1979--1994)  

SciTech Connect (OSTI)

This over-300 title publication list reflects the accomplishments of Los Alamos Yucca Mountain Site Characterization Project researchers, who, since 1979, have been conducting multidisciplinary research to help determine if Yucca Mountain, Nevada, is a suitable site for a high-level waste repository. The titles can be accessed in two ways: by year, beginning with 1994 and working back to 1979, and by subject area: mineralogy/petrology/geology, volcanism, radionuclide solubility/groundwater chemistry; radionuclide sorption and transport; modeling/validation/field studies; summary/status reports, and quality assurance.

Bowker, L.M.; Espinosa, M.L.; Klein, S.H. [comps.

1995-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Los Alamos National Laboratory Yucca Mountain Project Publications (1979-1996)  

SciTech Connect (OSTI)

This over-350 title publication list reflects the accomplishments of Los Alamos Yucca Mountain Site Characterization Project researchers, who, since 1979, have been conducting multidisciplinary research to help determine if Yucca Mountain, Nevada, is a suitable site for a high-level waste repository. The titles can be accessed in two ways: by year, beginning with 1996 and working back to 1979, and by subject area: mineralogy/petrology/geology, volcanism, radionuclide solubility/ground-water chemistry; radionuclide sorption and transport; modeling/validation/field studies; summary/status reports, and quality assurance.

Ruhala, E.R.; Klein, S.H. [comps.

1997-06-01T23:59:59.000Z

342

Yucca Mountain, Nevada - A Proposed Geologic Repository for High-Level Radioactive Waste (Volume 1) Introduction  

SciTech Connect (OSTI)

Yucca Mountain in Nevada represents the proposed solution to what has been a lengthy national effort to dispose of high-level radioactive waste, waste which must be isolated from the biosphere for tens of thousands of years. This chapter reviews the background of that national effort and includes some discussion of international work in order to provide a more complete framework for the problem of waste disposal. Other chapters provide the regional geologic setting, the geology of the Yucca Mountain site, the tectonics, and climate (past, present, and future). These last two chapters are integral to prediction of long-term waste isolation.

R.A. Levich; J.S. Stuckless

2006-09-25T23:59:59.000Z

343

Audit of management of the site characterization program at Yucca Mountain  

SciTech Connect (OSTI)

The Department of Energy (Department) is responsible for establishing an underground repository to store high-level nuclear waste. In accordance with the amended Nuclear Waste Policy Act of 1982, the Department began characterization of the Yucca Mountain site to assess the feasibility of safely storing spent fuel and high-level waste for 10,000 years. Site characterization was originally scheduled to be completed in 1995. Subsequently, your predecessor, Admiral Watkins, changed the plan completion date to 2001. The purpose of our audit was to determine if the Department is making adequate progress in characterizing the Yucca Mountain project.

Layton, J.C.

1995-02-15T23:59:59.000Z

344

SITE-SCALE SATURATED ZONE TRANSPORT  

SciTech Connect (OSTI)

This work provides a site-scale transport model for calculating radionuclide transport in the saturated zone (SZ) at Yucca Mountain, for use in the abstractions model in support of ''Total System Performance Assessment for License Application'' (TSPA-LA). The purpose of this model report is to provide documentation for the components of the site-scale SZ transport model in accordance with administrative procedure AP-SIII.10Q, Models. The initial documentation of this model report was conducted under the ''Technical Work Plan For: Saturated Zone Flow and Transport Modeling and Testing'' (BSC 2003 [DIRS 163965]). The model report has been revised in accordance with the ''Technical Work Plan For: Natural System--Saturated Zone Analysis and Model Report Integration'', Section 2.1.1.4 (BSC 2004 [DIRS 171421]) to incorporate Regulatory Integration Team comments. All activities listed in the technical work plan that are appropriate to the transport model are documented in this report and are described in Section 2.1.1.4 (BSC 2004 [DIRS 171421]). This report documents: (1) the advection-dispersion transport model including matrix diffusion (Sections 6.3 and 6.4); (2) a description and validation of the transport model (Sections 6.3 and 7); (3) the numerical methods for simulating radionuclide transport (Section 6.4); (4) the parameters (sorption coefficient, Kd ) and their uncertainty distributions used for modeling radionuclide sorption (Appendices A and C); (5) the parameters used for modeling colloid-facilitated radionuclide transport (Table 4-1, Section 6.4.2.6, and Appendix B); and (6) alternative conceptual models and their dispositions (Section 6.6). The intended use of this model is to simulate transport in saturated fractured porous rock (double porosity) and alluvium. The particle-tracking method of simulating radionuclide transport is incorporated in the finite-volume heat and mass transfer numerical analysis (FEHM) computer code, (FEHM V2.20, STN: 10086-2.20-00) (LANL 2003 [DIRS 161725]) and is described in Section 6.4 of this report. FEHM is a three-dimensional (3-D), finite-volume, finite-element, heat and mass flow-and-transport code. This report documents the features and capabilities of the site-scale transport model for calculating radionuclide transport in the SZ at Yucca Mountain in support of the TSPA-LA. Correlative flow-model calculations using FEHM are carried out and documented in the model report ''Saturated Zone Site-Scale Flow Model'' (BSC 2004 [DIRS 170037]). The velocity fields are calculated by the flow model independent of the transport processes and supplied as a part of the output package from the flow model, which is then used as inputs to the transport model. Several SZ analysis model reports provide information and data needed as feed-ins for this report, and this report in turn provides technical product outputs that feed into other SZ reports. The details of inputs to the site-scale transport model are provided in Section 4.

S. KELLER

2004-11-03T23:59:59.000Z

345

Secondary plant succession on disturbed sites at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

This report presents the results of a study of secondary plant succession on disturbed sites created during initial site investigations in the late 1970s and early 1980s at Yucca Mountain, NV. Specific study objectives were to determine the rate and success of secondary plant succession, identify plant species found in disturbances that may be suitable for site-specific reclamation, and to identify environmental variables that influence succession on disturbed sites. During 1991 and 1992, fifty seven disturbed sites were located. Vegetation parameters, disturbance characteristics and environmental variables were measured at each site. Disturbed site vegetation parameters were compared to that of undisturbed sites to determine the status of disturbed site plant succession. Vegetation on disturbed sites, after an average of ten years, was different from undisturbed areas. Ambrosia dumosa, Chrysothamnus teretifolius, Hymenoclea salsola, Gutierrezia sarothrae, Atriplex confertifolia, Atriplex canescens, and Stephanomeria pauciflora were the most dominant species across all disturbed sites. With the exception of A. dumosa, these species were generally minor components of the undisturbed vegetation. Elevation, soil compaction, soil potassium, and amounts of sand and gravel in the soil were found to be significant environmental variables influencing the species composition and abundance of perennial plants on disturbed sites. The recovery rate for disturbed site secondary succession was estimated. Using a linear function (which would represent optimal conditions), the recovery rate for perennial plant cover, regardless of which species comprised the cover, was estimated to be 20 years. However, when a logarithmic function (which would represent probable conditions) was used, the recovery rate was estimated to be 845 years. Recommendations for future studies and site-specific reclamation of disturbances are presented.

Angerer, J.P.; Ostler, W.K.; Gabbert, W.D.; Schultz, B.W.

1994-12-01T23:59:59.000Z

346

Geophysical monitoring of foam used to deliver remediation treatments within the vadose zone  

E-Print Network [OSTI]

relationships observed for unconsolidated sediments. Wateron unsaturated, unconsolidated sands. Geophysics 69:762-771.saturated and unsaturated unconsolidated samples (Vanhala

Wu, Y.

2013-01-01T23:59:59.000Z

347

Completion Report for the Well ER-6-2 Site Corrective Action Unit 97: Yucca Flat - Climax Mine  

SciTech Connect (OSTI)

Well ER-6-2 and its satellite hole, Well ER-6-2 No.1, were drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office in support of the Nevada Environmental Restoration Project at the Nevada Test Site, Nye County, Nevada. Well ER-6-2 was drilled in two stages in 1993 and 1994; the satellite hole, Well ER-6-2 No.1 was drilled nearby in 1993 but was abandoned. The wells were drilled as part of a hydrogeologic investigation program for the Yucca Flat-Climax Mine Corrective Action Unit Number 97, in the northeastern portion of the Nevada Test Site. The wells are located in Yucca Flat, within Area 6 of the Nevada Test Site. The wells provided information regarding the radiological and hydrogeological environment in a potentially down-gradient position from tests conducted in northern and central Yucca Flat. Construction of Well ER-6-2 began with a 1.2-meter-diameter surface conductor hole, which was drilled and cased off to a depth of 30.8 meters below the surface. A 50.8-centimeter diameter surface hole was then rotary drilled to the depth of 578.5 meters and cased off to the depth of 530.4 meters. The hole diameter was then reduced to 27.0 centimeters, and the borehole was advanced to a temporary depth of 611.4 meters. The borehole was conventionally cored to a total depth of 1,045 meters with a diameter of 14.0 centimeters. Borehole sloughing required cementing and re-drilling of several zones. The open-hole completion accesses the lower carbonate aquifer, the CP thrust fault, and the upper clastic confining unit. A fluid level depth of 543.2 meters was most recently measured in the open borehole in September 2007. No radionuclides were encountered during drilling. The satellite hole Well ER-6-2 No.1 was drilled approximately 15.2 meters north of Well ER-6-2 on the same drill pad. This was planned to be used as an observation well during future hydrologic testing at Well ER-6-2; however, the satellite hole was abandoned at the depth of 399 meters due to stuck drill pipe, and was subsequently cemented to the surface. Detailed lithologic descriptions with stratigraphic assignments in this report are based on composite drill cuttings samples collected every 3 meters, cores taken between the depths of 619.3 and 1,042.4 meters, and geophysical log data. Stratigraphic assignments within the Paleozoic section are based on paleontological analyses. The well was collared in alluvium and at 30.8 meters penetrated Paleozoic carbonate rocks. These consisted of dolostone with minor shale and limestone of the Bonanza King Formation, and limestone with minor quartzite, sandstone, and dolostone assigned to the Guilmette Formation. The borehole reached total depth in a shale unit assigned to the Chainman Shale. The units below the Bonanza King Formation are overturned due to faulting and folding and, therefore, are stratigraphically upside-down.

NSTec Environmental Management

2008-03-01T23:59:59.000Z

348

Structure and electronic properties of saturated and unsaturated gallium nitride nanotubes  

SciTech Connect (OSTI)

The atomic and electronic structures of saturated and unsaturated GaN nanotubes along the [001] direction with (100) lateral facets are studied using first-principles calculations. Atomic relaxation of nanotubes shows that appreciable distortion occurs in the unsaturated nanotubes. All the nanotubes considered, including saturated and unsaturated ones, exhibit semiconducting, with a direct band gap. Surface states arisen from the threefold-coordinated N and Ga atoms at the lateral facets exist inside the bulk-like band gap. When the nanotubes saturated with hydrogen, these dangling bond bands are removed from the band gap, but the band gap decreases with increasing the wall thickness of the nanotubes.

Wang, Zhiguo; Wang, Shengjie; Li, Jingbo; Gao, Fei; Weber, William J.

2009-11-05T23:59:59.000Z

349

Microbial Impacts to the Near-Field Environment Geochemistry (MING): A Model for Estimating Microbial Communities in Repository Drifts at Yucca Mountain  

SciTech Connect (OSTI)

Geochemical and microbiological modeling was performed to evaluate the potential quantities and impact of microorganisms on the geochemistry of the area adjacent to and within nuclear waste packages in the proposed repository drifts at Yucca Mountain, Nevada. The microbial growth results from the introduction of water, ground support, and waste package materials into the deep unsaturated rock. The simulations, which spanned one million years, were accomplished using a newly developed computer code, Microbial Impacts to the Near-Field Environment Geochemistry (MING). MING uses environmental thresholds for limiting microbial growth to temperatures below 120 C and above relative humidities of 90 percent in repository drifts. Once these thresholds are met, MING expands upon a mass balance and thermodynamic approach proposed by McKinley and others (1997), by using kinetic rates to supply constituents from design materials and constituent fluxes including solubilized rock components into the drift, to perform two separate mass-balance calculations as a function of time. The first (nutrient limit) assesses the available nutrients (C, N, P and S) and calculates how many microorganisms can be produced based on a microorganism stoichiometry of C{sub 160}(H{sub 280}O{sub 80})N{sub 30}P{sub 2}S. The second (energy limit) calculates the energy available from optimally combined redox couples for the temperature, and pH at that time. This optimization maximizes those reactions that produce > 15kJ/mol (limit on useable energy) using an iterative linear optimization technique. The final available energy value is converted to microbial mass at a rate of 1 kg of biomass (dry weight) for every 64 MJ of energy. These two values (nutrient limit and energy limit) are then compared and the smaller value represents the number of microorganisms that can be produced over a specified time. MING can also be adapted to investigate other problems of interest as the model can be used in saturated and unsaturated environments and in laboratory situations to establish microbial growth limitations. Other projected uses include investigations of contaminated locations where monitored natural attenuation or engineered bioremediation could be employed.

D.M. Jolley; T.F. Ehrhorn; J. Horn

2002-03-19T23:59:59.000Z

350

Seismicity in the Vicinity of Yucca Mountain, Nevada, for the Period October 1, 2004 to September 30, 2006  

SciTech Connect (OSTI)

This report describes earthquake activity within approximately 65 km of Yucca Mountain site during the October 1, 2004 to September 30, 2006 time period (FY05-06). The FY05-06 earthquake activity will be compared with the historical and more recent period of seismic activity in the Yucca Mountain region. The relationship between the distribution of seismicity and active faults, historical patterns of activity, and rates of earthquakes (number of events and their magnitudes) are important components in the assessment of the seismic hazard for the Yucca Mountain site. Since October 1992 the University of Nevada has compiled a catalog of earthquakes in the Yucca Mountain area. Seismicity reports have identified notable earthquake activity, provided interpretations of the seismotectonics of the region, and documented changes in the character of earthquake activity based on nearly 30 years of site-characterization monitoring. Data from stations in the seismic network in the vicinity of Yucca Mountain is collected and managed at the Nevada Seismological Laboratory (NSL) at the University of Nevada Reno (UNR). Earthquake events are systematically identified and cataloged under Implementing Procedures developed in compliance with the Nevada System of Higher Education (NSHE) Quality Assurance Program. The earthquake catalog for FY05-06 in the Yucca Mountain region submitted to the Yucca Mountain Technical Data Management System (TDMS) forms the basis of this report.

Smith, Ken

2007-11-26T23:59:59.000Z

351

Environmental assessment: Yucca Mountain Site, Nevada Research and Development Area, Nevada; Volume 2  

SciTech Connect (OSTI)

In February 1983, the US Department of Energy (DOE) identified the Yucca Mountain site in Nevada as one of nine potentially acceptable sites for a mined geologic repository for spent nuclear fuel and high-level radioactive waste. The site is in the Great Basin, which is one of five distinct geohydrologic settings considered for the first repository. To determine their suitability, the Yucca Mountain site and the eight other potentially acceptable sites have been evaluated in accordance with the DOE`s General Guidelines for the Recommendation of Sites for the Nuclear Waste Repositories. These evaluations were reported in draft environmental assessments (EAs), which were issued for public review and comment. After considering the comments received on the draft EAs, the DOE prepared the final EAs. On the basis of the evaluations reported in this EA, the DOE has found that the Yucca Mountain site is not disqualified under the guidelines. The DOE has also found that is is suitable for site characterization because the evidence does not support a conclusion that the site will not be able to meet each of the qualifying conditions specified in the guidelines. On the basis of these findings, the DOE is nominating the Yucca Mountain site as one of five sites suitable for characterization.

NONE

1986-05-01T23:59:59.000Z

352

DOE`s Yucca Mountain studies: What are they? Why are they being done?  

SciTech Connect (OSTI)

This booklet is about the disposal of high-level nuclear waste in the United States. It is intended for readers who do not have a technical background. It discusses why scientists and engineers think high-level nuclear waste may be disposed of safely underground. It also describes why Yucca Mountain, Nevada, is being studied and provides basic information about those studies.

NONE

1990-12-01T23:59:59.000Z

353

Environmental assessment: Yucca Mountain site, Nevada research and development area, Nevada; Volume 3  

SciTech Connect (OSTI)

In February 1983, the US Department of Energy (DOE) identified the Yucca Mountain site in Nevada as one of nine potentially acceptable sites for a mined geologic repository for spent nuclear fuel and high-level radioactive waste. The site is in the Great Basin, which is one of five distinct geohydrologic settings considered for the first repository. To determine their suitability, the Yucca Mountain site and the eight other potentially acceptable sites have been evaluated in accordance with the DOE`s General Guidelines for the Recommendation of Sites for the Nuclear Waste Repositories. These evaluations were reported in draft environmental assessments (EAs), which were issued for public review and comment. After considering the comments received on the draft EAs, the DOE prepared the final EAs. On the basis of the evaluations reported in this EA, the DOE has found that the Yucca Mountain site is not disqualified under the guidelines. The DOE has also found that it is suitable for site characterization because the evidence does not support a conclusion that the site will not be able to meet each of the qualifying conditions specified in the guidelines. On the basis of these findings, the DOE is nominating the Yucca Mountain site as one of five sites suitable for characterization.

NONE

1986-05-01T23:59:59.000Z

354

Seismic modeling and analysis of a prototype heated nuclear waste storage tunnel, Yucca Mountain, Nevada  

E-Print Network [OSTI]

was heated to replicate the effects of long-term storage of decaying nuclear waste and to study the effects for the long- term storage of high-level nuclear waste from reactors and decom- missioned atomic weaponsSeismic modeling and analysis of a prototype heated nuclear waste storage tunnel, Yucca Mountain

Snieder, Roel

355

Yucca Mountain Biological Resources Monitoring Program. Progress report, January 1994--December 1994  

SciTech Connect (OSTI)

The US Department of Energy (DOE) is required by the Nuclear Waste Policy Act of 1982 (as amended in 1987) to study and characterize the suitability of Yucca Mountain as a potential geological repository for high-level nuclear waste. During site characterization, the DOE will conduct a variety of geotechnical, geochemical, geological, and hydrological studies to determine the suitability of Yucca Mountain as a potential repository. To ensure that site characterization activities do not adversely affect the environment at Yucca Mountain, a program has been implemented to monitor and mitigate potential impacts and ensure activities comply with applicable environmental regulations. This report describes the activities and accomplishments of EG and G Energy Measurements, Inc. (EG and G/EM) from January 1994 through December 1994 for six program areas within the Terrestrial Ecosystem component of the environmental program for the Yucca Mountain Site Characterization Project (YMP): Site Characterization Effects, Desert Tortoises (Gopherus agassizii), Habitat Reclamation, Monitoring and Mitigation, Radiological Monitoring, and Biological Support.

NONE

1995-07-01T23:59:59.000Z

356

Los Alamos National Laboratory Yucca Mountain Site Characterization Project 1995 quality program status report  

SciTech Connect (OSTI)

This status report summarizes the activities and accomplishments of the Los Alamos National Laboratory Yucca Mountain Site Characterization Project`s (YMP`s) quality assurance program for January 1 to September 30, 1995. The report includes major sections on program activities and trend analysis.

Bolivar, S.L.

1996-07-01T23:59:59.000Z

357

Distance learning and its application to the Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

This paper discusses the concept of distance learning, which is used to exchange information via electronic media with real time interaction. Issues concerning policy, funding, legislation, accessibility, and programming are outlined. Possible applications for education, business, and federal projects, with a focus on the Yucca Mountain Site Characterization Project, are also discussed.

Brandt, J.; Sizemore, J. [SAIC, Las Vegas, NV (United States)

1995-12-01T23:59:59.000Z

358

Key Intermediates in Combinatorial Chemistry:? Access to Various Heterocycles from ?,?-Unsaturated Ketones on the Solid Phase  

Science Journals Connector (OSTI)

The value of ?,?-unsaturated ketones as key intermediates for the combinatorial assembly of four different templates on the solid phase, namely pyrimidines, dihydropyrimidinones, pyridines, and pyrazoles, was explored with individual syntheses of variably ...

Andreas L. Marzinzik; Eduard R. Felder

1998-01-22T23:59:59.000Z

359

Radionuclide transport from yucca Mountain and Inter-basin Flow in Death Valley  

SciTech Connect (OSTI)

Hydrodynamics and the U.S. Geological survey conducted studies to evaluate far-field issues related to potential transport, by ground water, of radionuclide into Inyo County from Yucca Mountain, including Death Valley, and the evaluation of a connection between the Lower Carbonate Aquifer (LCA) and the biosphere. Our oversight and completed Cooperative Agreement research, and a number of other investigators research indicate that there is groundwater flow between the alluvial and carbonate aquifers both at Yucca Mountain and in Inyo County. The specific purpose of our research was to acquire geological, subsurface geology, and hydrologic data to: 1. Establish the existence of inter-basin flow between the Amargosa Basin and Death Valley Basin, 2. Characterize groundwater flow paths in the LCA through Southern Funeral Mountain Range, and 3. Evaluate the hydraulic connection between the Yucca Mountain repository and the major springs in Death Valley through the LCA. 4. Evaluate the hydraulic connection between the Yucca Mountain repository and Franklin Lake Playa. The hydraulic characterization of the LCA is of critical interest to Inyo County and the U.S. Department of Energy because: 1. The upward gradient in the LCA at Yucca Mountain provides a natural barrier to radionuclide transport, 2. The LCA is a necessary habitat resource for the endangered Devil's Hole pup fish, and 3. The LCA is the primary water supply and source of water to the major springs in Death Valley National Park. This paper presents the results of our study program to evaluate if inter-basin flow exists between the Amargosa and Death Valley Basins through the LCA. The study presents the results of our structural geology analysis of the Southern Funeral Mountain range, geochemical source analysis of spring waters in the region, and a numerical groundwater model to simulate inter-basin flow in the Southern Funeral Mountain range. (authors)

Bredehoeft, J. [The Hydrodynamics Group (United States); Fridrich, C. [U.S. Geological Survey-Denver (United States); King, C.HG.M. [The Hydrodynamics Group, LLC (United States)

2007-07-01T23:59:59.000Z

360

Site characterization progress report: Yucca Mountain, Nevada, April 1, 1992--September 30, 1992, Number 7  

SciTech Connect (OSTI)

In accordance with section 113(b)(3) of the Nuclear Waste Policy Act of 1982, as amended (NWPA), the Department has prepared the seventh in a series of reports on the progress of site characterization at the Yucca Mountain candidate site. The Civilian Radioactive Waste Management Program made significant progress during the reporting period at the Yucca Mountain Site Characterization Project. Several important advances were made in the surface-based testing program including: initiation of borehole drilling utilizing the new, state-of-the-art LM-300 drill rig which employs dry drilling and coring techniques; neutron access borehole drilling to evaluate infiltration processes; excavations to aid geologic mapping; and trenching in Midway Valley to study Quaternary faulting. A Floodplain Assessment and Statement of Findings was published in the Federal Register which concluded there would be no significant impact nor cumulative impacts on floodplains resulting from Exploratory Studies Facility activities. The National Academy of Sciences` National Research Council released its report entitled ``Ground Water at Yucca Mountain: How High Can It Rise?`` which concluded that none of the evidence cited as proof of groundwater upwelling in and around Yucca Mountain could be reasonably attributed to that process and that significant water table excursions to the repository design level are not shown by the geologic record. The June 29, 1992, earthquake near Yucca Mountain provided scientists with a wealth of information relevant to understanding the neotectonics of the area and the geometry of faults at depth. Early findings suggest that accelerations recorded were well within proposed design limits for the surface waste handling facilities.

NONE

1992-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Viscosity of plant oils as a function of temperature, fatty acid chain length, and unsaturation  

E-Print Network [OSTI]

VISCOS1TY OF PLANT OILS AS A FUNCTION OF TEMPERATURE, FATIY ACID CHAIN LENGTH, AND UNSATURATION A Thesis by TONG HENG NEO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1988 Major Subject: Agricultural Engineering VISCOSITY OF PLANT OILS AS A FUNCTION OF TEMPERATURE, FATTY ACID CHAIN LENGTH, AND UNSATURATION A Thesis by TONG HENG NEO Approved as to style and content by...

Neo, Tong Heng

1988-01-01T23:59:59.000Z

362

Renaissance Zones (North Dakota)  

Broader source: Energy.gov [DOE]

Renaissance Zones allow qualifying businesses and individuals to claim one or more tax incentives for purchasing, leasing, or making improvements to real property located in a North Dakota...

363

Modeling of strongly heat-driven flow processes at a potential high-level nuclear waste repository at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Two complementary numerical models for analyzing high-level nuclear waste emplacement at Yucca Mountain have been developed. A vertical cross-sectional (X-Z) model permits a realistic representation of hydrogeologic features, such as alternating tilting layers of welded and non-welded tuffs. fault zones, and surface topography. An alternative radially symmetric (R-Z) model is more limited in its ability to describe the hydrogeology of the site, but is better suited to model heat transfer in the host rock. Our models include a comprehensive description of multiphase fluid and heat flow processes, including strong enhancements of vapor diffusion from pore-level phase change effects. The neighborhood of the repository is found to partially dry out from the waste heat. A condensation halo of large liquid saturation forms around the drying zone, from which liquid flows downward at large rates. System response to infiltration from the surface and to ventilation of mined openings is evaluated. The impact of the various flow processes on the waste isolation capabilities of the site is discussed.

Pruess, K.; Tsang, Y.

1993-01-01T23:59:59.000Z

364

Room at the Mountain: Estimated Maximum Amounts of Commercial Spent Nuclear Fuel Capable of Disposal in a Yucca Mountain Repository  

SciTech Connect (OSTI)

The purpose of this paper is to present an initial analysis of the maximum amount of commercial spent nuclear fuel (CSNF) that could be emplaced into a geological repository at Yucca Mountain. This analysis identifies and uses programmatic, material, and geological constraints and factors that affect this estimation of maximum amount of CSNF for disposal. The conclusion of this initial analysis is that the current legislative limit on Yucca Mountain disposal capacity, 63,000 MTHM of CSNF, is a small fraction of the available physical capacity of the Yucca Mountain system assuming the current high-temperature operating mode (HTOM) design. EPRI is confident that at least four times the legislative limit for CSNF ({approx}260,000 MTHM) can be emplaced in the Yucca Mountain system. It is possible that with additional site characterization, upwards of nine times the legislative limit ({approx}570,000 MTHM) could be emplaced. (authors)

Kessler, John H. [Electric Power Research Institute - EPRI, 3420 Hillview Avenue, Palo Alto, California 94304 (United States); Kemeny, John [University of Arizona, Tucson AZ 85721 (United States); King, Fraser [Integrity Corrosion Consulting, Ltd., 6732 Silverview Drive NW, Calgary, Alberta (Canada); Ross, Alan M. [Alan M. Ross and Associates, 1061 Gray Fox Circle Pleasanton, CA 94566 (Canada); Ross, Benjamen [Disposal Safety, Inc., Bethesda, MD 20814 (United States)

2006-07-01T23:59:59.000Z

365

Potential applications of three-dimensional geoscientific mapping and modeling systems to regional hydrogeological assessments at Yucca mountain, Nevada  

Science Journals Connector (OSTI)

Three-dimensional Geoscientific Information Systems (GSIS) are being evaluated for supporting 3-D ground-water modeling activities required to evaluate the paleo-, present, and future hydrology at Yucca Mountain,...

A. Keith Turner; Kenneth E. Kolm

1992-01-01T23:59:59.000Z

366

Hydrogen Diffusion and Trapping Effects in Low and Medium Carbon Steels for Subsurface Reinforcement in the Proposed Yucca Mountain Repository  

Science Journals Connector (OSTI)

The electrochemical hydrogen permeation method was used to investigate hydrogen transport, trapping characteristics of low (0.08 pct C) and medium carbon (0.44 pct C) steels proposed for the Yucca Mountain (YM) r...

Joshua Lamb; Venugopal Arjunan…

2007-02-01T23:59:59.000Z

367

Climate Zones Robinson Projection  

E-Print Network [OSTI]

Climate Zones Africa ´Robinson Projection Copyright 2007. The Trustees of Columbia University University. Population, Landscape, and Climate Estimates (PLACE). Further information available at: http://sedac.ciesin.columbia.edu/place/ Publish Date: 03/13/07 0 500 km Climate zones were taken from the Köppen Climate Classification map

Columbia University

368

Scenarios constructed for the effects of tectonic processes on the potential nuclear waste repository at Yucca Mountain  

SciTech Connect (OSTI)

A comprehensive collection of scenarios is presented that connect initiating tectonic events with radionuclide releases by logical and physically possible combinations or sequences of features, events and processes. The initiating tectonic events include both discrete faulting and distributed rock deformation developed through the repository and adjacent to it, as well as earthquake-induced ground motion and changes in tectonic stress at the site. The effects of these tectonic events include impacts on the engineered-barrier system, such as container rupture and failure of repository tunnels. These effects also include a wide range of hydrologic effects such as changes in pathways and flow rates in the unsaturated and saturated zones, changes in the water-table configuration, and in the development of perched-water systems. These scenarios are intended go guide performance-assessment analyses and to assist principal investigators in how essential field, laboratory, and calculational studies are used. This suite of scenarios will help ensure that all important aspects of the system disturbance related to a tectonic scenario are captured in numerical analyses. It also provides a record of all options considered by project analysts to provide documentation required for licensing agreement. The final portion of this report discusses issues remaining to be addressed with respect to tectonic activity. 105 refs.

Barr, G.E.; Borns, D.J. [Sandia National Labs., Albuquerque, NM (United States); Fridrich, C. [Geological Survey, Lakewood, CO (United States)

1996-10-01T23:59:59.000Z

369

Measurement of Wind-Induced Pressure Gradients in a Waste Rock Pile  

Science Journals Connector (OSTI)

...constraints can be determined. Funding for this research was...the wind blow through Yucca Mountain. p. 45-53. In D...High-Level Radioactive Waste Disposal. NUREG CP-0040. U...unsaturated zone waste disposal waste rock Western Canada...

Richard T. Amos; David W. Blowes; Leslie Smith; David C. Sego

370

Vadose Zone Transport Field Study: Summary Report  

SciTech Connect (OSTI)

From FY 2000 through FY 2003, a series of vadose zone transport field experiments were conducted as part of the U.S. Department of Energy’s Groundwater/Vadose Zone Integration Project Science and Technology Project, now known as the Remediation and Closure Science Project, and managed by the Pacific Northwest National Laboratory (PNNL). The series of experiments included two major field campaigns, one at a 299-E24-11 injection test site near PUREX and a second at a clastic dike site off Army Loop Road. The goals of these experiments were to improve our understanding of vadose zone transport processes; to develop data sets to validate and calibrate vadose zone flow and transport models; and to identify advanced monitoring techniques useful for evaluating flow-and-transport mechanisms and delineating contaminant plumes in the vadose zone at the Hanford Site. This report summarizes the key findings from the field studies and demonstrates how data collected from these studies are being used to improve conceptual models and develop numerical models of flow and transport in Hanford’s vadose zone. Results of these tests have led to a better understanding of the vadose zone. Fine-scale geologic heterogeneities, including grain fabric and lamination, were observed to have a strong effect on the large-scale behavior of contaminant plumes, primarily through increased lateral spreading resulting from anisotropy. Conceptual models have been updated to include lateral spreading and numerical models of unsaturated flow and transport have revised accordingly. A new robust model based on the concept of a connectivity tensor was developed to describe saturation-dependent anisotropy in strongly heterogeneous soils and has been incorporated into PNNL’s Subsurface Transport Over Multiple Phases (STOMP) simulator. Application to field-scale transport problems have led to a better understanding plume behavior at a number of sites where lateral spreading may have dominated waste migration (e.g. BC Cribs and Trenches). The improved models have been also coupled with inverse models and newly-developed parameter scaling techniques to allow estimation of field-scale and effective transport parameters for the vadose zone. The development and utility of pedotransfer functions for describing fine-scale hydrogeochemical heterogeneity and for incorporating this heterogeneity into reactive transport models was explored. An approach based on grain-size statistics appears feasible and has been used to describe heterogeneity in hydraulic properties and sorption properties, such as the cation exchange capacity and the specific surface area of Hanford sediments. This work has also led to the development of inverse modeling capabilities for time-dependent, subsurface, reactive transport with transient flow fields using an automated optimization algorithm. In addition, a number of geophysical techniques investigated for their potential to provide detailed information on the subtle changes in lithology and bedding surfaces; plume delineation, leak detection. High-resolution resistivity is now being used for detecting saline plumes at several waste sites at Hanford, including tank farms. Results from the field studies and associated analysis have appeared in more than 46 publications generated over the past 4 years. These publications include test plans and status reports, in addition to numerous technical notes and peer reviewed papers.

Ward, Andy L.; Conrad, Mark E.; Daily, William D.; Fink, James B.; Freedman, Vicky L.; Gee, Glendon W.; Hoversten, Gary M.; Keller, Jason M.; Majer, Ernest L.; Murray, Christopher J.; White, Mark D.; Yabusaki, Steven B.; Zhang, Z. F.

2006-07-31T23:59:59.000Z

371

Development of an on-site ex-situ unsaturated-flow remediation process for trace metal contaminated soils.  

E-Print Network [OSTI]

??Innovative means and methods were tested to develop an economical, pragmatic and environmentally sustainable soil remediation process for heavy metal contaminated soils. An unsaturated-flow soil… (more)

Andrade, Marc-David

2005-01-01T23:59:59.000Z

372

Mineralogy, petrology and whole-rock chemistry of selected mechanical test samples of Yucca Mountain tuffs; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

Petrologic, bulk chemical and mineralogic data are presented for 19 samples of tuffaceous rocks from core holes UE-25a{number_sign}1, USW G-1, USW GU-3, and USW G-4 at Yucca Mountain, Nevada. The suite of samples contains a wide variety of petrologic types, including zeolitized, glassy, and devitrified tuffs. Data include hand sample and thin section descriptions (with modal analyses for which uncertainties are estimated), and major element analyses with uncertainty estimates. No uncertainties were estimated for qualitative mineral identifications by X-ray diffraction. 5 refs., 1 fig., 4 tabs.

Connolly, J.R. [New Mexico Univ., Albuquerque, NM (United States)

1991-12-01T23:59:59.000Z

373

Characterization, Propagation and Analysis of Aleatory and Epistemic Uncertainty in the 2008 Performance Assessment for the Proposed Repository for High-Level Radioactive Waste at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

The 2008 performance assessment (PA) for the proposed repository for high-level radioactive waste at Yucca Mountain (YM), Nevada, illustrates the conceptual...

Clifford W. Hansen; Jon C. Helton; Cédric J. Sallaberry

2010-01-01T23:59:59.000Z

374

Finite - difference modeling of the Yucca Mountain, Nevada Area: a study of the regional water table gradients based on hydraulic conductivity contrasts.  

E-Print Network [OSTI]

??The Nevada Yucca Mountain site is being investigated to determine if it is a suitable site for the construction of a high-level nuclear waste repository.… (more)

Davidson, Timothy Ross

2012-01-01T23:59:59.000Z

375

Recommendation by the Secretary of Energy Regarding the Suitability of the Yucca Mountain Site for a Repository Under the Nuclear Waste Policy Act of 1982  

Broader source: Energy.gov [DOE]

Recommendation by the Secretary of Energy Regarding the Suitability of the Yucca Mountain Site for a Repository Under the Nuclear Waste Policy Act of 1982

376

Deep Vadose Zone Field Activities  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

HANFORD ADVISORY BOARD, RAP March 6, 2013 Presented by: John Morse DEEP VADOSE ZONE ACTIVITIES Page 2 Deep Vadose Zone Areas Page 3 Deep Vadose Zone Field Activities FY 2014...

377

Microsoft Word - STATEMENT OF GREGORY H. FRIEDMAN _April 5 2005_--Yucca.doc  

Broader source: Energy.gov (indexed) [DOE]

BEFORE THE U.S. HOUSE OF REPRESENTATIVES COMMITTEE ON GOVERNMENT REFORM SUBCOMMITTEE ON THE FEDERAL WORKFORCE AND AGENCY ORGANIZATION FOR RELEASE ON DELIVERY 10:00 a.m., Tuesday, April 5, 2005 1 Mr. Chairman and members of the Subcommittee, I am pleased to be here today to testify regarding recent allegations of misconduct involving documents associated with the U.S. Department of Energy's Yucca Mountain Project. Disposal of the Nation's high-level nuclear waste and spent nuclear fuel is one of the most sensitive and complex challenges facing the U.S. Government. Under the Nuclear Waste Policy Act, as amended in 1987, the Yucca Mountain site in the State of Nevada is the only site in the United States to be evaluated for this purpose. The Act established a

378

DOE to Send Proposed Yucca Mountain Legislation to Congress | Department of  

Broader source: Energy.gov (indexed) [DOE]

March 6, 2007 - 10:28am March 6, 2007 - 10:28am Addthis WASHINGTON, DC - Secretary of Energy Samuel W. Bodman announced today he will send to the U.S. Congress a legislative proposal to enhance the nation's ability to manage and dispose of commercial spent nuclear fuel and Defense high-level radioactive waste. "This legislative proposal reflects the Administration's strong commitment to advancing the development of the Yucca Mountain repository, while seeking to provide stability, clarity and predictability in moving the project forward," Secretary Bodman said. "Nuclear power is a clean, reliable domestic source of energy that currently represents approximately 20 percent of the nation's energy supply. The Yucca Mountain repository is critical to the nation's current and future energy and national security

379

Site characterization plan: Yucca Mountain Site, Nevada Research and Development Area, Nevada: Volume 9, Index  

SciTech Connect (OSTI)

This site characterization plan (SCP) has been developed for the candidate repository site at Yucca Mountain in the State of Nevada. The SCP includes a description of the Yucca Mountain site (Chapters 1-5), a conceptual design for the repository (Chapter 6), a description of the packaging to be used for the waste to be emplaced in the repository (Chapter 7), and a description of the planned site characterization activities (Chapter 8). The schedules and milestones presented in Sections 8.3 and 8.5 of the SCP were developed to be consistent with the June 1988 draft Amendment to the DOE`s Mission Plan for the Civilian Radioactive Waste Management Program. The five month delay in the scheduled start of exploratory shaft construction that was announced recently is not reflected in these schedules.

NONE

1988-12-01T23:59:59.000Z

380

Mineralogical Charecteristics of Yucca Mountain Alluvium and Effects on Neptunium (V) Sorption  

SciTech Connect (OSTI)

Saturated alluvium is expected to serve as an important natural barrier to radionuclide transport at Yucca Mountain, the proposed geological repository for disposal of high-level nuclear wastes. {sup 237}Np(V) (half-life = 2.4 x 10{sup 5} years) has been identified as one of the radionuclides that could potentially contribute the greatest dose to humans because of its relatively high solubility and weak adsorption to volcanic tuffs under oxidizing conditions. The previous studies suggested that the mineralogical characteristics of the alluvium play an important role in the interaction between Np(V) and the alluvium. The purpose of this study is to further evaluate the mineralogical basis for Neptunium (V) sorption by saturated alluvium located down-gradient of Yucca Mountain.

M. Ding; S.J. Chipera; P.W. Reimus

2006-09-05T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Use of Integrated Decay Heat Limits to Facilitate Spent Nuclear Fuel Loading to Yucca Mountain  

SciTech Connect (OSTI)

As an alternative to the use of the linear loading or areal power density (APD) concept, using integrated decay heat limits based on the use of mountain-scale heat transfer analysis is considered to represent the thermal impact from the deposited spent nuclear fuel (SNF) to the Yucca Mountain repository. Two different integrated decay heat limits were derived to represent both the short-term (up to 50 years from the time of repository closure) and the long-term decay heat effect (up to 1500 years from the time of repository closure). The derived limits were found to appropriately represent the drift wall temperature limit (200 deg. C) and the midway between adjacent drifts temperature limit (96 deg. C) as long as used fuel is uniformly loaded into the mountain. These limits can be a useful practical guide to facilitate the loading of used fuel into Yucca Mountain. (authors)

Li, Jun; Yim, Man-Sung; McNelis, David [Department of Nuclear Engineering, North Carolina State University (United States); Piet, Steven [Idaho National Laboratory (United States)

2007-07-01T23:59:59.000Z

382

Multiscale Thermohydrologic Model Supporting the Licence Application for the Yucca Mountain Repository  

SciTech Connect (OSTI)

The MultiScale ThermoHydrologic Model (MSTHM) predicts thermal-hydrologic (TH) conditions within emplacement tunnels (drifts) and in the adjoining host rock at Yucca Mountain, Nevada, which is the proposed site for a radioactive waste repository in the US. Because these predictions are used in the performance assessment of the Yucca Mountain repository, they must address the influence of variability and uncertainty of the engineered- and natural-system parameters that significantly influence those predictions. Parameter-sensitivity studies show that the MSTHM predictions adequately propagate the influence of parametric variability and uncertainty. Model-validation studies show that the influence of conceptual-model uncertainty on the MSTHM predictions is insignificant compared to that of parametric uncertainty, which is propagated through the MSTHM.

T.A> Buscheck; Y. Sun; Y. Hao

2006-03-28T23:59:59.000Z

383

Evaluating the Long-Term Safety of a Repository at Yucca Mountain   

SciTech Connect (OSTI)

Regulations require that the repository be evaluated for its health and safety effects for 10,000 years for the Site Recommendation process. Regulations also require potential impacts to be evaluated for up to a million years in an Environmental Impact Statement. The Yucca Mountain Project is in the midst of the Site Recommendation process. The Total System Performance Assessment (TSPA) that supports the Site Recommendation evaluated safety for these required periods of time. Results showed it likely that a repository at this site could meet the licensing requirements promulgated by the Nuclear Regulatory Commission. The TSPA is the tool that integrates the results of many years of scientific investigations with design information to allow evaluations of potential far-future impacts of building a Yucca Mountain repository. Knowledge created in several branches of physics is part of the scientific basis of the TSPA that supports the Site Recommendation process.

Abe Van Luik

2009-07-17T23:59:59.000Z

384

Audit of Management of the Site Characterization Program at Yucca Mountain, IG-0366  

Broader source: Energy.gov (indexed) [DOE]

5, 1995 5, 1995 IG-1 INFORMATION: "Audit of Management of the Site Characterization Program at Yucca Mountain" The Secretary BACKGROUND: The Department of Energy (Department) is responsible for establishing an underground repository to store high-level nuclear waste. In accordance with the amended Nuclear Waste Policy Act of 1982, the Department began characterization of the Yucca Mountain site to assess the feasibility of safely storing spent fuel and high-level waste for 10,000 years. Site characterization was originally scheduled to be completed in 1995. Subsequently, the Secretary of Energy changed the plan completion date to 2001. The purpose of our audit was to determine if the Department is making adequate progress in

385

Site characterization progress report, Yucca Mountain, Nevada: Number 19, April 1, 1998--September 30, 1998  

SciTech Connect (OSTI)

The nineteenth semiannual report of the Yucca Mountain Site Characterization Project (YMP) summarizes activities during the period from April 1, 1998, through September 30, 1998. Project activities are aimed at evaluating Yucca Mountain as a potential location for permanent geologic disposal of nuclear materials, as directed by the Nuclear Waste Policy Act of 1982, as amended (NWPA). The progress report documents activities this period that contribute to completing the Project`s near-term programmatic and statutory objectives. These objectives include completing the Viability Assessment, the Environmental Impact Statement (EIS), a possible US Department of Energy (DOE) Secretarial Site Recommendation to the President, and, if the site is suitable, submittal of a license application to the US Nuclear Regulatory Commission (NRC). Project work this period continued to be concentrated in three integrated activities: site characterization, engineering design and construction, and performance assessment. Accomplishments this period and their relation to near-term objectives are briefly summarized.

Not Available

1999-06-01T23:59:59.000Z

386

Environmental review and regulation for siting a nuclear waste repository at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

The U.S. Department of Energy (DOE) has proposed that the first geologic repository for high-level nuclear waste in the United States be sited at Yucca Mountain, Nevada. Repository sitting was exempted by the Nuclear Waste Policy Act from the requirements for an environmental impact statement under the National Environmental Policy Act (NEPA) and, additionally, the DOE was prohibited by law from acquiring new empirical information for environmental assessment. Thus, no systematic, interdisciplinary evaluation of impacts based on site-specific data will occur before the Yucca Mountain environment is irreparably altered by site characterization. Exemption of siting activities for the nation's first geologic repository for high-level nuclear wastes from NEPA review is further evidence of the eclipse of NEPA in decision making, a trend that may foretell how controversial, technologically complex projects will be carried out in the future.

Charles R. Malone

1989-01-01T23:59:59.000Z

387

Semiarid unsaturated zone chloride profiles: Archives of past land use change impacts on water resources in the southern High Plains,  

E-Print Network [OSTI]

) was quantified using chloride mass balance calculations. The timing of land use change was estimated using

Scanlon, Bridget R.

388

Development Opportunity Zone Credit  

Broader source: Energy.gov [DOE]

The Development Opportunity Zone Credits incent new and expanding businesses in the Cities of Beloit, Janesville and Kenosha by providing non-refundable tax credits to assist with the creation and...

389

Deep Vadose Zone  

Broader source: Energy.gov [DOE]

The Mission of the Deep Vadose Zone Applied Field Research Initiative is to protect water resources across the DOE complex over the long-term by developing effective solutions to solve DOE’s most...

390

Factors Affecting Radiation Dose from a Hypothetical Extrusive Volcanic Event at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

This paper describes the factors that could affect doses to the reasonably maximally exposed individual (RMEI) as a result of a hypothetical extrusive igneous event at Yucca Mountain. Based on available information, there is no evidence that most of the spent fuel in waste packages intersected by a volcanic conduit would be reduced to fine-grained material and subsequently erupted as volcanic ash. (authors)

Weiner, R. [U. S. NRC Advisory Committee on Nuclear Waste and Materials, Rockville, MD (United States); Coleman, N. [U.S. Nuclear Regulatory Commission, Rockville, MD (United States)

2008-07-01T23:59:59.000Z

391

Independent management and financial review, Yucca Mountain Project, Nevada. Final report, Appendix  

SciTech Connect (OSTI)

The Nuclear Waste Policy Act of 1982 (Public Law 97-425), as amended by Public Law 100-203, December 22, 1987, established the Office of Civilian Radioactive Waste Management (OCRWM) within the Department of Energy (DOE), and directed the Office to investigate a site at Yucca Mountain, Nevada, to determine if this site is suitable for the construction of a repository for the disposal of high level nuclear waste. Work on site characterization has been under way for several years. Thus far, about $1.47 billion have been spent on Yucca Mountain programs. This work has been funded by Congressional appropriations from a Nuclear Waste Fund to which contributions have been made by electric utility ratepayers through electric utilities generating power from nuclear power stations. The Secretary of Energy and the Governor of the State of Nevada have appointed one person each to a panel to oversee an objective, independent financial and management evaluation of the Yucca Mountain Project. The Requirements for the work will include an analysis of (1) the Yucca Mountain financial and, contract management techniques and controls; (2) Project schedules and credibility of the proposed milestones; (3) Project organizational effectiveness and internal planning processes, and (4) adequacy of funding levels and funding priorities, including the cost of infrastructure and scientific studies. The recipient will provide monthly progress report and the following reports/documents will be presented as deliverables under the contract: (1) Financial and Contract Management Preliminary Report; (2) Project Scheduling Preliminary Report; (3)Project Organizational Effectiveness Preliminary Report; (4) Project Funding Levels and Funding Priorities Preliminary Report; and (5) Final Report.

NONE

1995-07-15T23:59:59.000Z

392

Determination of Rock Mass Modulus Using the Plate Loading Method at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

A suite of plate loading tests has recently been conducted by Sandia National Laboratories at the Exploratory Studies Facility at Yucca Mountain, Nevada. Fielding of these in situ tests as well as other approaches undertaken for the determination of rock mass modulus are described. The various methodologies are evaluated and their data compared. Calculation by existing empirical methods and numerical modeling are compared to each other as well as to field data.

Finley, R.E.; George, J.T.; Riggins, M.

1999-08-02T23:59:59.000Z

393

Los Alamos National Laboratory Yucca Mountain Site Characterization Project 1994 quality program status report  

SciTech Connect (OSTI)

This status report is for calendar year 1994. It summarizes the annual activities and accomplishments of the Los Alamos National Laboratory Yucca Mountain Site Characterization Project (YMP or Project) quality assurance program. By identifying the accomplishments of the quality program, a baseline is established that will assist in decision making, improve administrative controls and predictability, and allow us to annually identify adverse trends and to evaluate improvements. This is the fourth annual status report.

Bolivar, S.L.

1996-03-01T23:59:59.000Z

394

Queen Anne's County- Solar Zoning  

Broader source: Energy.gov [DOE]

Queen Anne's County zoning code allows for ground mounted solar arrays in areas zoned as "open space," "agricultural," and "countryside" districts.

395

A revised Litostragraphic Framework for the Southern Yucca Mountain Area, Nye County, Nevada  

SciTech Connect (OSTI)

An informal, revised lithostratigraphic framework for the southern Yucca Mountain area, Nevada has been developed to accommodate new information derived from subsurface investigations of the Nye County Early Warning Drilling Program. Lithologies penetrated by recently drilled boreholes at locations between Stagecoach Road and Highway 95 in southern Nye County include Quaternary and Pliocene alluvium and alluvial breccia, Miocene pyroclastic flow deposits and intercalated lacustrine siltstone and claystone sequences, early Miocene to Oligocene pre-volcanic sedimentary rocks, and Paleozoic strata. Of the 37 boreholes currently drilled, 21 boreholes have sufficient depth, spatial distribution, or traceable pyroclastic flow, pyroclastic fall, and reworked tuff deposits to aid in the lateral correlation of lithostrata. Medial and distal parts of regional pyroclastic flow deposits of Miocene age can be correlated with the Timber Mountain, Paintbrush, Crater Flat, and Tram Ridge Groups. Rocks intercalated between these regional pyroclastic flow deposits are substantially thicker than in the central part of Yucca Mountain, particularly near the downthrown side of major faults and along the southern extent of exposures at Yucca Mountain.

R.W. Spengler; F.M. Byers; R.P. Dickerson

2006-03-24T23:59:59.000Z

396

Yucca Mountain Site Characterization Project bibliography, 1992--1994. Supplement 4  

SciTech Connect (OSTI)

Following a reorganization of the Office of Civilian Radioactive Waste Management in 1990, the Yucca Mountain Project was renamed Yucca Mountain Site Characterization Project. The title of this bibliography was also changed to Yucca Mountain Site Characterization Project Bibliography. Prior to August 5, 1988, this project was called the Nevada Nuclear Waste Storage Investigations. This bibliography contains information on this ongoing project that was added to the Department of Energy`s Energy Science and Technology Database from January 1, 1992, through December 31, 1993. The bibliography is categorized by principal project participating organization. Participant-sponsored subcontractor reports, papers, and articles are included in the sponsoring organization`s list. Another section contains information about publications on the Energy Science and Technology Database that were not sponsored by the project but have some relevance to it. Earlier information on this project can be found in the first bibliography DOE/TIC-3406, which covers 1977--1985, and its three supplements DOE/OSTI-3406(Suppl.1), DOE/OSTI-3406(Suppl.2), and DOE/OSTI-3406(Suppl.3), which cover information obtained during 1986--1987, 1988--1989, and 1990--1991, respectively. All entries in the bibliographies are searchable online on the NNW database file. This file can be accessed through the Integrated Technical Information System (ITIS) of the US Department of Energy (DOE).

NONE

1992-06-01T23:59:59.000Z

397

Integrated Strategy to Address Hanford’s Deep Vadose Zone Remediation Challenges  

SciTech Connect (OSTI)

A vast majority of Hanford’s remaining in-ground contaminants reside in the vadose zone of the Central Plateau, where reprocessing operations occurred. The vadose zone is comprised of about 75 meters of water-unsaturated sediments above groundwater. These contaminants have, and continue to release into groundwater that discharges to the Columbia River. If left untreated, these contaminants could remain a threat for centuries. Much of this contamination resides deep in the vadose zone, below the effective depth of tradition surface remedy influence. In 2008, the Department of Energy initiated deep vadose zone treatability testing to seek remedies for technetium-99 and uranium contamination. These tests include the application of desiccation for technetium-99 and reactive gas technologies for uranium. To complement these efforts, the Department of Energy has initiated a “defense-in-depth” approach to address the unique challenges for characterization and remediation of the deep vadose zone. This defense-in-depth approach will implement multiple approaches to understand and control contaminant flux from the deep vadose zone to the groundwater. Among these approaches is an increased investment in science and technology solutions to resolve deep vadose zone challenges including characterization, prediction, remediation, and monitoring.

Triplett, Mark B.; Freshley, Mark D.; Truex, Michael J.; Wellman, Dawn M.; Gerdes, Kurt D.; Charboneau, Briant L.; Morse, John G.; Lober, Robert W.; Chronister, Glen B.

2010-10-03T23:59:59.000Z

398

YUCCA MOUNTAIN PROJECT RECOMMENDATION BY THE SECRETARY OF ENERGY REGARDING THE SUITABILITY OF THE YUCCA MOUNTAIN SITE FOR A REPOSITORY UNDER THE NUCLEAR WASTE POLICY ACT OF 1982  

SciTech Connect (OSTI)

For more than half a century, since nuclear science helped us win World War II and ring in the Atomic Age, scientists have known that !he Nation would need a secure, permanent facility in which to dispose of radioactive wastes. Twenty years ago, when Congress adopted the Nuclear Waste Policy Act of 1982 (NWPA or ''the Act''), it recognized the overwhelming consensus in the scientific community that the best option for such a facility would be a deep underground repository. Fifteen years ago, Congress directed the Secretary of Energy to investigate and recommend to the President whether such a repository could be located safely at Yucca Mountain, Nevada. Since then, our country has spent billions of dollars and millions of hours of research endeavoring to answer this question. I have carefully reviewed the product of this study. In my judgment, it constitutes sound science and shows that a safe repository can be sited there. I also believe that compelling national interests counsel in favor of proceeding with this project. Accordingly, consistent with my responsibilities under the NWPA, today I am recommending that Yucca Mountain be developed as the site for an underground repository for spent fuel and other radioactive wastes. The first consideration in my decision was whether the Yucca Mountain site will safeguard the health and safety of the people, in Nevada and across the country, and will be effective in containing at minimum risk the material it is designed to hold. Substantial evidence shows that it will. Yucca Mountain is far and away the most thoroughly researched site of its kind in the world. It is a geologically stable site, in a closed groundwater basin, isolated on thousands of acres of Federal land, and farther from any metropolitan area than the great majority of less secure, temporary nuclear waste storage sites that exist in the country today. This point bears emphasis. We are not confronting a hypothetical problem. We have a staggering amount of radioactive waste in this country--nearly 100,000,000 gallons of high-level nuclear waste and more than 40,000 metric tons of spent nuclear fuel with more created every day. Our choice is not between, on the one hand, a disposal site with costs and risks held to a minimum, and, on the other, a magic disposal system with no costs or risks at all. Instead, the real choice is between a single secure site, deep under the ground at Yucca Mountain, or making do with what we have now or some variant of it--131 aging surface sites, scattered across 39 states. Every one of those sites was built on the assumption that it would be temporary. As time goes by. every one is closer to the limit of its safe life span. And every one is at least a potential security risk--safe for today, but a question mark in decades to come.

NA

2002-03-26T23:59:59.000Z

399

Unsaturated conductivity and diffusivity of selected Texas soils in relation to their physical and chemical properties  

E-Print Network [OSTI]

in "ar'tial Puli lilt~en' of the reauinezer. t, fan the de;cee o KH 6 ' S "I' N Augus". IooR Xa)on Suspect: Soil PHYsics UNSATURATED CONDUCTIVITY AND DIFFUSIVITY OF SELECTED TEXAS SOILS IN RELATION TO THEIR PHYSICAL AND CHE1'IICAL PROPERTIES A... THesis George Lewis Derendingez Approved as to style and content by: Chas. I+ f ' ~1tt (~lember (l'Le Id+ID ) Anglst 1ooG AB STRA CT Unsaturated Conductivity and Diffusivity of Selected Texas Soils in Relation to Their Physical and Chemical...

Derendinger, George Lewis

2012-06-07T23:59:59.000Z

400

Transient nature of salt movement with wetting front in an unsaturated soil  

E-Print Network [OSTI]

TRANSIENT NATURE OF SALT MOVEMENT WITH WETTING FRONT IN AN UNSATURATED SOIL A Thesis bY VISHWAS VINAYAK SOMAN Submitted to the Office of Graduate Studies of Texas A&M UniversitY in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 1992 Major Subject: Agricultural Engineering TRANSIENT NATURE OF SALT MOVEMENT WITH WETTING FRONT IN AN UNSATURATED SOIL A Thesis VISHWAS VINAYAK SOMAN Approved as to style and content by: Marshall J. McFarland (Chair...

Soman, Vishwas Vinayak

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Steady state method to determine unsaturated hydraulic conductivity at the ambient water potential  

DOE Patents [OSTI]

The present invention relates to a new laboratory apparatus for measuring the unsaturated hydraulic conductivity at a single water potential. One or more embodiments of the invented apparatus can be used over a wide range of water potential values within the tensiometric range, requires minimal laboratory preparation, and operates unattended for extended periods with minimal supervision. The present invention relates to a new laboratory apparatus for measuring the unsaturated hydraulic conductivity at a single water potential. One or more embodiments of the invented apparatus can be used over a wide range of water potential values within the tensiometric range, requires minimal laboratory preparation, and operates unattended for extended periods with minimal supervision.

HUbbell, Joel M.

2014-08-19T23:59:59.000Z

402

Porous Metal-Organic Framework with Coordinatively Unsaturated MnII Sites:Sorption Properties for Various Gases  

E-Print Network [OSTI]

Porous Metal-Organic Framework with Coordinatively Unsaturated MnII Sites:Sorption Properties solid [Mn(NDC)]n (2), which contains coordinatively unsaturated MnII sites, reveals remarkable sorption capabilities for N2, H2, CO2, and CH4 gases and exhibits type I sorption behavior indicative of permanent

Paik Suh, Myunghyun

403

Statement of Charles G. Groat Director, U.S. Geological Survey, U.S. Depa...rce and Agency Organization, On The Yucca Mountain Project, April 5, 2005 Congressional Testimony, 2005  

E-Print Network [OSTI]

Organization, On The Yucca Mountain Project, April 5, 2005 Congressional Testimony, 2005 Statement of Charles G on Government Reform, Subcommittee on the Federal Workforce and Agency Organization On The Yucca Mountain's (DOE) Yucca Mountain Project. Let me emphasize from the outset how seriously USGS takes this situation

Torgersen, Christian

404

The following changes to the EIA in the Yucca Mountain Rule Docket (A-95-12, V-B-2) were made in this document to correct typographical and other minor errors in the text.  

E-Print Network [OSTI]

The following changes to the EIA in the Yucca Mountain Rule Docket (A-95-12, V-B-2) were made Radiation Protection Standards for Yucca Mountain, Nevada" Pg. ii Item 4.1 changed to read, "Performance Standards with Expected Values of TSPA-SR Calculations for a Repository at Yucca Mountain for Nominal

405

6930 Journal of the American Chemical Society 1 100:22 / October 25, 1978 Low-Lying Electronic States of Unsaturated Carbenes.  

E-Print Network [OSTI]

States of Unsaturated Carbenes. Comparison with Methylene John W. Kenney, II1,la Jack Sirnons,*la George

Simons, Jack

406

Accelerated weathering of high-level and plutonium-bearing lanthanide borosilicate waste glasses under hydraulically unsaturated conditions  

Science Journals Connector (OSTI)

The US Department of Energy (DOE) has proposed that a can-in-canister waste package design be used for disposal of excess weapons-grade Pu at the proposed mined geologic repository at Yucca Mountain, Nevada. This configuration consists of a high-level waste (HLW) canister fitted with a rack that holds mini-canisters containing a Pu-bearing lanthanide borosilicate (LaBS) waste glass and/or titanate-based ceramic (?15% of the total canister volume). The remaining volume of the HLW canister is then filled with HLW glass (?85% of the total canister volume). A 6-a pressurized unsaturated flow (PUF) test was conducted to investigate waste form–waste form interactions that may occur when water penetrates the canisters and contacts the waste forms. The PUF column volumetric water content was observed to increase steadily during the test because of water accumulation associated with alteration phases formed on the surfaces of the glasses. Periodic excursions in effluent pH, electrical conductivity, and solution chemistry were monitored and correlated with the formation of a clay phase(s) during the test. Geochemical modeling, with the EQ3NR code, of select effluent solution samples suggests the dominant secondary reaction product for the surrogate HLW glass, SRL-202, is a smectite di-octahedral clay phase(s), possibly nontronite [Na0.33 Fe2(AlSi)4O10(OH)2 · n(H2O)] or beidellite [Na0.33Al2.33Si3.67O10(OH)2]. This clay phase was identified in scanning electron microscope (SEM) images as discrete spherical particles growing out of a hydrated gel layer on reacted SRL-202 glass. Alpha energy analysis (AEA) of aliquots of select effluent samples that were filtered through a 1.8 nm filter suggest that approximately 80% of the total measurable Pu was in the form of a filterable particulate, in comparison to unfiltered aliquots of the same sample. These results suggest the filterable particles are >1.8 nm but smaller than the 0.2 ?m average diameter openings of the Ti porous plate situated at the base of the column. In this advection-dominated system, Pu appeared to be migrating principally as or in association with colloids after being released from the LaBS glass. Analyses of reacted LaBS glass particles with SEM with energy dispersive X-ray spectroscopy suggest that Pu may have segregated into a discrete disk-like phase, possibly PuO2. Alteration products that contain the neutron absorber Gd have not been positively identified. Separation of the Pu and the neutron absorber Gd during glass dissolution and transport could be a criticality issue for the proposed repository. However, the translation and interpretation of these long-term PUF test results to actual disposed waste packages requires further analysis.

Eric M. Pierce; B.P. McGrail; P.F. Martin; J. Marra; B.W. Arey; K.N. Geiszler

2007-01-01T23:59:59.000Z

407

Numerical Simulation of Inter-basin Groundwater Flow into Northern Yucca Flat, Nevada National Security Site, Using the Death Valley Regional Flow System Model  

SciTech Connect (OSTI)

Models of groundwater flow for the Yucca Flat area of the Nevada National Security Site (NNSS) are under development by the U.S. Department of Energy (DOE) for corrective action investigations of the Yucca Flat-Climax Mine Corrective Action Unit (CAU). One important aspect of these models is the quantity of inter-basin groundwater flow from regional systems to the north. This component of flow, together with its uncertainty, must be properly accounted for in the CAU flow models to provide a defensible regional framework for calculations of radionuclide transport that will support determinations of the Yucca Flat-Climax Mine contaminant boundary. Because characterizing flow boundary conditions in northern Yucca Flat requires evaluation to a higher level of detail than the scale of the Yucca Flat-Climax Mine CAU model can efficiently provide, a study more focused on this aspect of the model was required.

Pohlmann Karl,Ye Ming

2012-03-01T23:59:59.000Z

408

Evaluation of the geologic relations and seismotectonic stability of the Yucca Mountain area, Nevada Nuclear Waste Site Investigation (NNWSI); Final report: Volume 2  

SciTech Connect (OSTI)

This document describes activities for the year ending 30 June 1988 by staff members of the Seismological Laboratory in support of the Yucca Mountain site assessment program. Participants include James N. Brune, Director, John Anderson, William Peppin, Keith Priestley, Martha Savage, and Ute Vetter. Activities during the year centered largely around acquisition of equipment to be used for site characterization plan for Yucca Mountain. Due to modifications in the scheduling and level of funding, this work has not progressed as originally anticipated. The report describes progress in seven areas, listed in approximate order of significance to the Yucca Mountain project. These are: (1) equipment acquisition, (2) review of the draft site characterization plan, (3) studies of earthquake sequence related to the tectonic problems at Yucca Mountain, (4) a review of the work of Szymanski in relation to Task 4 concerns, (5) coordination meetings with USGS, DOE and NRC personnel, (6) studies related to Yucca Mountain and (7) other studies.

NONE

1988-10-01T23:59:59.000Z

409

Colloid Facilitated Transport of Radioactive Cations in the Vadose Zone: Field Experiments Oak Ridge  

SciTech Connect (OSTI)

The overarching goal of this study was to improve understanding of colloid-facilitated transport of radioactive cations through unsaturated soils and sediments. We conducted a suite of laboratory experiments and field experiments on the vadose-zone transport of colloids, organic matter, and associated contaminants of interest to the U.S. Department of Energy (DOE). The laboratory and field experiments, together with transport modeling, were designed to accomplish the following detailed objectives: 1. Evaluation of the relative importance of inorganic colloids and organic matter to the facilitation of radioactive cation transport in the vadose zone; 2. Assessment of the role of adsorption and desorption kinetics in the facilitated transport of radioactive cations in the vadose zone; 3. Examination of the effects of rainfall and infiltration dynamics and in the facilitated transport of radioactive cations through the vadose zone; 4. Exploration of the role of soil heterogeneity and preferential flow paths (e.g., macropores) on the facilitated transport of radioactive cations in the vadose zone; 5. Development of a mathematical model of facilitated transport of contaminants in the vadose zone that accurately incorporates pore-scale and column-scale processes with the practicality of predicting transport with readily available parameters.

James E. Saiers

2012-09-20T23:59:59.000Z

410

Linking drainage front morphology with gaseous diffusion in unsaturated porous media: A lattice Boltzmann study  

E-Print Network [OSTI]

porous media is analyzed using the lattice Boltzmann method LBM . Flow regimes for immiscible in a physical experiment such as a micromodel. In this study, we use the lattice Boltzmann method LBMLinking drainage front morphology with gaseous diffusion in unsaturated porous media: A lattice

Shor, Leslie McCabe

411

A COMPARATIVE STUDY OF THE FORMATION OF AROMATICS IN RICH METHANE FLAMES DOPED BY UNSATURATED COMPOUNDS  

E-Print Network [OSTI]

unsaturated hydrocarbons: allene and propyne, because they are precursors of propargyl radicals which are well as the background gas makes these flames more representative of the combustion of a real fuel compared to a flame by passing through a single pass heat exchanger [14]. Temperature profiles were obtained using a PtRh 3 hal

Boyer, Edmond

412

The influence of changes in water content on the electrical resistivity of a natural unsaturated loess  

E-Print Network [OSTI]

1 The influence of changes in water content on the electrical resistivity of a natural unsaturated these methods, the measurements based on the electrical resistivity are simple and reliable thanks to the clear relationship between the water content and the electrical resistivity of soils. In this work, a new electrical

Paris-Sud XI, Université de

413

Subduction Zone | Open Energy Information  

Open Energy Info (EERE)

Subduction Zone Subduction Zone Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Subduction Zone Dictionary.png Subduction Zone: A tectonic process in which one tectonic plate is forced beneath another and sinks into the mantle as the plates converge Other definitions:Wikipedia Reegle Tectonic Settings List of tectonic settings known to host modern geothermal systems: Extensional Tectonics Subduction Zone Rift Zone Hot Spot Non-Tectonic Strike-Slip A classic cartoon illustrating a typical simplified subduction zone. http://www.columbia.edu/~vjd1/subd_zone_basic.htm Subduction zones occur where one tectonic plate is pulled under another. Most often the subducting plate is oceanic crust and contains many hydrous minerals. As the oceanic plate subducts it dewaters into the mantle,

414

Report of the Peer Review Panel on the early site suitability evaluation of the Potential Repository Site at Yucca Mountain, Nevada; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

The US Department of Energy (DOE) Yucca mountain Site Characterization Project Office (YMPO) assigned Science Applications International Corporation (SAIC), the Technical and Management Support Services (T&MSS) contractor to the YmPo, the task of conducting an Early Site Suitability Evaluation (ESSE) of the Yucca mountain site as a potential site for a high-level radioactive waste repository. First, the assignment called for the development of a method to evaluate a single site against the DOE General Guidelines for Recommendation of Sites for Nuclear Waste Repositories, 10 CFR Part 960. Then, using this method, an evaluation team, the ESSE Core Team, of senior YMP scientists, engineers, and technical experts, evaluated new information obtained about the site since publication of the final Environmental Assessment (DOE, 1986) to determine if new suitability/unsuitability findings could be recommended. Finally, the Core Team identified further information and analyses needed to make final determinations for each of the guidelines. As part of the task, an independent peer review of the ESSE report has been conducted. Expertise was solicited that covered the entire spectrum of siting guidelines in 10 CFR Part 960 in order to provide a complete, in-depth critical review of the data evaluated and cited in the ESSE report, the methods used to evaluate the data, and the conclusions and recommendations offered by the report. Fourteen nationally recognized technical experts (Table 2) served on the Peer Review Panel. The comments from the Panel and the responses prepared by the ESSE Core Team, documented on formal Comment Response Forms, constitute the body of this document.

NONE

1992-01-01T23:59:59.000Z

415

Summary and evaluation of existing geological and geophysical data near prospective surface facilities in Midway Valley, Yucca Mountain Project, Nye County, Nevada; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

Midway Valley, located at the eastern base of the Yucca Mountain in southwestern Nevada, is the preferred location of the surface facilities for the potential high-level nuclear waste repository at Yucca Mountain. One goal in siting these surface facilities is to avoid faults that could produce relative displacements in excess of 5 cm in the foundations of the waste-handling buildings. This study reviews existing geologic and geophysical data that can be used to assess the potential for surface fault rupture within Midway Valley. Dominant tectonic features in Midway Valley are north-trending, westward-dipping normal faults along the margins of the valley: the Bow Ridge fault to the west and the Paintbrush Canyon fault to the east. Published estimates of average Quaternary slip rates for these faults are very low but the age of most recent displacement and the amount of displacement per event are largely unknown. Surface mapping and interpretive cross sections, based on limited drillhole and geophysical data, suggest that additional normal faults, including the postulated Midway Valley fault, may exist beneath the Quaternary/Tertiary fill within the valley. Existing data, however, are inadequate to determine the location, recency, and geometry of this faulting. To confidently assess the potential for significant Quaternary faulting in Midway Valley, additional data are needed that define the stratigraphy and structure of the strata beneath the valley, characterize the Quaternary soils and surfaces, and establish the age of faulting. The use of new and improved geophysical techniques, combined with a drilling program, offers the greatest potential for resolving subsurface structure in the valley. Mapping of surficial geologic units and logging of soil pits and trenches within these units must be completed, using accepted state-of-the-art practices supported by multiple quantitative numerical and relative age-dating techniques.

Gibson, J.D. [Sandia National Labs., Albuquerque, NM (United States); Swan, F.H.; Wesling, J.R.; Bullard, T.F.; Perman, R.C.; Angell, M.M.; DiSilvestro, L.A. [Geomatrix Consultants, Inc., San Francisco, CA (United States)

1992-01-01T23:59:59.000Z

416

Accommodation Zone | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Accommodation Zone Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Accommodation Zone Dictionary.png Accommodation Zone: Accommodation zones occur at fault intersections consisting of belts of interlocking, oppositely dipping normal faults. Multiple subsurface fault intersections in these zones are a favorable host for geothermal activity. Other definitions:Wikipedia Reegle Controlling Structures List of controlling structures typically associated with geothermal systems: Major Normal Fault Termination of a Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones

417

Multiple-point statistical prediction on fracture networks at Yucca Mountain  

SciTech Connect (OSTI)

In many underground nuclear waste repository systems, such as at Yucca Mountain, water flow rate and amount of water seepage into the waste emplacement drifts are mainly determined by hydrological properties of fracture network in the surrounding rock mass. Natural fracture network system is not easy to describe, especially with respect to its connectivity which is critically important for simulating the water flow field. In this paper, we introduced a new method for fracture network description and prediction, termed multi-point-statistics (MPS). The process of the MPS method is to record multiple-point statistics concerning the connectivity patterns of a fracture network from a known fracture map, and to reproduce multiple-scale training fracture patterns in a stochastic manner, implicitly and directly. It is applied to fracture data to study flow field behavior at the Yucca Mountain waste repository system. First, the MPS method is used to create a fracture network with an original fracture training image from Yucca Mountain dataset. After we adopt a harmonic and arithmetic average method to upscale the permeability to a coarse grid, THM simulation is carried out to study near-field water flow in the surrounding waste emplacement drifts. Our study shows that connectivity or patterns of fracture networks can be grasped and reconstructed by MPS methods. In theory, it will lead to better prediction of fracture system characteristics and flow behavior. Meanwhile, we can obtain variance from flow field, which gives us a way to quantify model uncertainty even in complicated coupled THM simulations. It indicates that MPS can potentially characterize and reconstruct natural fracture networks in a fractured rock mass with advantages of quantifying connectivity of fracture system and its simulation uncertainty simultaneously.

Liu, X.Y; Zhang, C.Y.; Liu, Q.S.; Birkholzer, J.T.

2009-05-01T23:59:59.000Z

418

Physical processes and effects of magmatism in the Yucca Mountain region  

SciTech Connect (OSTI)

This paper describes initial studies related to the effects of volcanism on performance of the proposed Yucca Mountain radioactive waste repository, and to the general processes of magmatism in the Yucca Mountain region. Volcanism or igneous activity can affect the repository performance by ejection of waste onto the earth`s surface (eruptive effects), or by subsurface effects of hydrothermal processes and altered hydrology if an intrusion occurs within the repository block. Initial, conservative calculations of the volume of waste that might be erupted during a small-volume basaltic eruption (such as those which occurred in the Yucca Mountain region) indicate that regulatory limits might be exceeded. Current efforts to refine these calculations, based upon field studies at analog sites, are described. Studies of subsurface effects are just beginning, and are currently focused on field studies of intrusion properties and contact metamorphism at deeply eroded analog sites. General processes of magmatism are important for providing a physical basis for predictions of future volcanic activity. Initial studies have focused on modeling basaltic magma chambers in conjunction with petrographic and geochemical studies. An example of the thermal-fluid dynamic evolution of a small basaltic sill is described, based on numerical simulation. Quantification of eruption conditions can provide valuable information on the overall magmatic system. We are developing quantitative methods for mapping pyroclastic facies of small basaltic centers and, in combination with two-phase hydrodynamic simulation, using this information to estimate eruption conditions. Examples of such hydrodynamic simulations are presented, along with comparison to an historical eruption in Hawaii.

Valentine, G.A.; Crowe, B.M. [Los Alamos National Lab., NM (United States); Perry, F.V. [New Mexico Univ., Albuquerque, New Mexico (USA). Dept. of Geology

1991-12-31T23:59:59.000Z

419

The Yucca Mountain Project prototype air-coring test, U12g tunnel, Nevada test site  

SciTech Connect (OSTI)

The Prototype Air-Coring Test was conducted at the Nevada Test Site (NTS) G-Tunnel facility to evaluate standard coring techniques, modified slightly for air circulation, for use in testing at a prospective nuclear waste repository at Yucca Mountain, Nevada. Air-coring technology allows sampling of subsurface lithology with minimal perturbation to ambient characteristic such as that required for exploratory holes near aquifers, environmental applications, and site characterization work. Two horizontal holes were cored, one 50 ft long and the other 150 ft long, in densely welded fractured tuff to simulate the difficult drilling conditions anticipated at Yucca Mountain. Drilling data from seven holes on three other prototype tests in nonwelded tuff were also collected for comparison. The test was used to establish preliminary standards of performance for drilling and dust collection equipment and to assess procedural efficiencies. The Longyear-38 drill achieved 97% recovery for HQ-size core (-2.5 in.), and the Atlas Copco dust collector (DCT-90) captured 1500 lb of fugitive dust in a mine environment with only minor modifications. Average hole production rates were 6-8 ft per 6-h shift in welded tuff and almost 20 ft per shift on deeper holes in nonwelded tuff. Lexan liners were successfully used to encapsulate core samples during the coring process and protect core properties effectively. The Prototype Air-Coring Test demonstrated that horizontal air coring in fractured welded tuff (to at least 150 ft) can be safely accomplished by proper selection, integration, and minor modification of standard drilling equipment, using appropriate procedures and engineering controls. The test also indicated that rig logistics, equipment, and methods need improvement before attempting a large-scale dry drilling program at Yucca Mountain.

Ray, J.M. [Los Alamos National Lab., NM (United States); Newsom, J.C. [Newsom Industries, Citrus Heights, CA (United States)

1994-12-01T23:59:59.000Z

420

Information-Sharing Protocol for the Transportation of Radioactive Waste to Yucca Mountain  

Broader source: Energy.gov (indexed) [DOE]

Preliminary Draft for Review Only Preliminary Draft for Review Only Information-Sharing for Transportation of Radioactive Waste to Yucca Mountain Office of Logistics Management Office of Civilian Radioactive Waste Management U. S. Department of Energy Preliminary Draft July 2007 1 Preliminary Draft for Review Only TABLE OF CONTENTS 1.0 INTRODUCTION...........................................................................3 1.1 Background ....................................................................................................... 3 1.2 Document Origin and Structure...................................................................... 4 1.3 Information Sharing with Department of Homeland Security..................... 4 2.0 DISCUSSION OF TERMS ..................................................................................

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Site environmental report for calendar year 1994, Yucca Mountain Site, Nye County, Nevada.  

SciTech Connect (OSTI)

The Yucca Mountain Site Characterization office has established an environmental program to ensure that facilities are operated in order to protect, maintain, and restore environmental quality, minimize potential threats to the environment and the public, and comply with environmental policies and US DOE orders. The status of the environmental program has been summarized in this annual report to characterize performance, confirm compliance with environmental requirements, and highlight significant programs and efforts during CY 1994. Monitoring, archaeology, groundwater, ecosystems, tortoise conservation, waste minimization, etc., are covered.

NONE

1995-06-01T23:59:59.000Z

422

A FRAMEWORK FOR THE ANALYSIS OF LOCALIZED CORROSION AT THE PROPOSED YUCCA MOUNTAIN REPOSITORY  

SciTech Connect (OSTI)

Corrosion is a primary determinant of waste package performance at the proposed Yucca Mountain Repository: (1) the most likely degradation process; (2) controls the delay time for radionuclide transport from the waste package; and (3) determines when packages will be penetrated and the shape size and distribution of those penetrations. In this presentation a framework for the analysis of localized corrosion is presented and demonstrated for a scenario: (1) water chemistry of mixed salt solutions (sodium chloride-potassium nitrate); and (2) time-temperature-relative humidity profiles for a hot, mid and cool temperature waste package.

Dr. J.H. Payer

2006-04-18T23:59:59.000Z

423

Yucca Mountain Waste Package Closure System Robotic Welding and Inspection System  

SciTech Connect (OSTI)

The Waste Package Closure System (WPCS), for the closure of radioactive waste in canisters for permanent storage of spent nuclear fuel (SNF) and high-level waste in the Yucca Mountain Repository was designed, fabricated, and successfully demonstrated at the Idaho National Laboratory (INL). This article focuses on the robotic hardware and tools necessary to remotely weld and inspect the closure lid welds. The system was operated remotely and designed for use in a radiation field, due to the SNF contained in the waste packages being closed.

C. I. Nichol; D. P. Pace; E. D. Larsen; T. R. McJunkin; D. E. Clark; M. L. Clark; K. L. Skinner; A. D. Watkins; H. B. Smartt

2011-10-01T23:59:59.000Z

424

Geochemistry of Natural Components in the Near-Field Environment, Yucca Mountain, Nevada  

SciTech Connect (OSTI)

The natural near-field environment in and around the emplacement drifts of the proposed nuclear waste repository at Yucca Mountain, Nevada, includes the host rock, dust, seepage, and pore water. The chemical compositions of these components have been determined for assessing possible chemical and mineralogical reactions that may occur after nuclear waste is emplaced. The rock hosting the proposed repository is relatively uniform as shown by a mean coefficient of variation (CV) of 9 percent for major elements. In contrast, compositional variations of dust (bulk and water-soluble fractions), pore water, and seepage are large with mean CVs ranging from 28 to 64 percent. (authors)

Peterman, Zell E. [Yucca Mountain Project Branch, U.S. Geological Survey, MS 963 Box 25046 Denver Federal Center, 6th and Kipling Sts., Denver, CO, 80225 (United States); Oliver, Thomas A. [c/o U.S. Geological Survey, S.M. Stoller Corporation, MS 421 Box 25046 Denver Federal Center, Denver, CO, 80225 (United States)

2007-07-01T23:59:59.000Z

425

A Summary of Properties Used to Evaluate INEEL Calcine Disposal in the Yucca Mountain Repository  

SciTech Connect (OSTI)

To support evaluations of the direct disposal of Idaho National Engineering and Environmental Laboratory calcines to the repository at Yucca Mountain, an evaluation of the performance of the calcine in the repository environment must be performed. This type of evaluation demonstrates, through computer modeling and analysis, the impact the calcine would have on the ability of the repository to perform its function of containment of materials during the repository lifetime. This report discusses parameters that were used in the scoping evaluation conducted in FY 2003. It provides nominal values for the parameters, with explanation of the source of the values, and how the values were modified for use in repository analysis activities.

Dahl, C.A.

2003-07-14T23:59:59.000Z

426

Strategic Basis for License Application Planning for a Potential Yucca Mountain Repository  

SciTech Connect (OSTI)

If Yucca Mountain, Nevada is designated as the site for development of a geologic repository for disposal of spent nuclear fuel and high-level radioactive waste, the Department of Energy (DOE) must obtain Nuclear Regulatory Commission (NRC) approval first for repository construction, then for an operating license, and, eventually, for repository closure and decommissioning. The licensing criteria defined in Code of Federal Regulations, Title 10, Part 63 (10 CFR Part 63) establish the basis for these NRC decisions. Submittal of a license application (LA) to the NRC for authorization to construct a repository at the Yucca Mountain site is, at this point, only a potential future action by the DOE. The policy process defined in the Nuclear Waste Policy Act (NWPA), as amended, for recommendation and designation of Yucca Mountain as a repository site makes it difficult to predict whether or when the site might be designated. The DOE may only submit a LA to the NRC if the site designation takes effect. In spite of this uncertainty, the DOE must take prudent and appropriate action now, and over the next several years, to prepare for development and timely submittal of a LA. This is particularly true given the need for the DOE to develop, load, and certify the operation of its electronic information system to provide access to its relevant records as part of the licensing support network (LSN) in compliance with NRC requirements six months prior to LA submittal. The DOE must also develop a LA, which is a substantially different document from those developed to support a Site Recommendation (SR) decision. The LA must satisfy NRC licensing criteria and content requirements, and address the acceptance criteria defined by the NRC in its forthcoming Yucca Mountain Review Plan (YMRP). The content of the LA must be adequate to facilitate NRC acceptance and docketing for review, and the LA and its supporting documents must provide the documented basis for the NR C findings required for a construction authorization. The LA must also support a licensing proceeding before an Atomic Safety and Licensing Board panel prior to NRC action on any decision to authorize construction. The DOE has established a strategic basis for planning that is intended to provide the framework for development of an integrated plan for activities leading to preparation and submittal of a LA.

Newberry, C. M.; Brocoum, S. J.; Gamble, R. P.; Murray, R. C.; Cline, M.

2002-02-26T23:59:59.000Z

427

Supplemental Performance Analyses for the Potential High-Level Nuclear Waste Repository at Yucca Mountain  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) is considering the possible recommendation of a site at Yucca Mountain, Nevada, for the potential development of a geologic repository for the disposal of high-level radioactive waste and spent nuclear fuel. To facilitate public review and comment, in May 2001 the DOE released the Yucca Mountain Science and Engineering Report (S&ER) (1), which presents technical information supporting the consideration of the possible site recommendation. The report summarizes the results of more than 20 years of scientific and engineering studies. Based on internal reviews of the S&ER and its key supporting references, the Total System Performance Assessment for the Site Recommendation (TSPA-SR) (2) and the Analysis Model Reports and Process Model Reports cited therein, the DOE has recently identified and performed several types of analyses to supplement the treatment of uncertainty in support of the consideration of a possible site recommendation. The results of these new analyses are summarized in the two-volume report entitled FY01 Supplemental Science and Performance Analysis (SSPA) (3,4). The information in this report is intended to supplement, not supplant, the information contained in the S&ER. The DOE recognizes that important uncertainties will always remain in any assessment of the performance of a potential repository over thousands of years (1). One part of the DOE approach to recognizing and managing these uncertainties is a commitment to continued testing and analysis and to the continued evaluation of the technical basis supporting the possible recommendation of the site, such as the analysis contained in the SSPA. The goals of the work described here are to provide insights into the implications of newly quantified uncertainties, updated science, and evaluations of lower operating temperatures on the performance of a potential Yucca Mountain repository and to increase confidence in the results of the TSPA described in the S&ER (1). The primary tool used to evaluate the implications of the three types of supplemental information described in the SSPA (3,4) is the Yucca Mountain integrated TSPA model.

Sevougian, S. D.; McNeish, J. A.; Coppersmith, K.; Jenni, K. E.; Rickertsen, L. D.; Swift, P. N.; Wilson, M. L.

2002-02-26T23:59:59.000Z

428

Site characterization progress report, April 1, 1994--September 30, 1994: Yucca Mountain, Nevada. Volume 11  

SciTech Connect (OSTI)

The Civil Radioactive Waste Management Program was restructured to provide a new approach to the evaluation of the site for development as a repository and to its licensing. Funding was increased for FY 95, with most of the increase going to the Yucca Mountain site characterization project. During this period, significant progress was made in surface-based testing, advanced conceptual design, performance assessment, planning, licensing support system development activities, and construction of the Exploratory Studies Facility. The report is divided into the following sections: introduction, programmatic activities, site programs, repository design, waste package, performance assessment, and exploratory studies facility design/construction.

NONE

1995-03-01T23:59:59.000Z

429

Building Technologies Office: Climate Zones  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Climate Zones to Climate Zones to someone by E-mail Share Building Technologies Office: Climate Zones on Facebook Tweet about Building Technologies Office: Climate Zones on Twitter Bookmark Building Technologies Office: Climate Zones on Google Bookmark Building Technologies Office: Climate Zones on Delicious Rank Building Technologies Office: Climate Zones on Digg Find More places to share Building Technologies Office: Climate Zones on AddThis.com... About Take Action to Save Energy Partner With DOE Activities Solar Decathlon Building America Research Innovations Research Tools Building Science Education Climate-Specific Guidance Solution Center Partnerships Meetings Publications Home Energy Score Home Performance with ENERGY STAR Better Buildings Neighborhood Program Challenge Home Guidelines for Home Energy Professionals

430

Rift Zone | Open Energy Information  

Open Energy Info (EERE)

Rift Zone Rift Zone Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Rift Zone Dictionary.png Rift Zone: A divergent plate boundary within a continent Other definitions:Wikipedia Reegle Tectonic Settings List of tectonic settings known to host modern geothermal systems: Extensional Tectonics Subduction Zone Rift Zone Hot Spot Non-Tectonic Strike-Slip The Rio Grande Rift exemplifies rift zone tectonics - increased volcanic activity and the formation of graben structures (reference: science-art.com) Rift valleys occur at divergent plate boundaries, resulting in large graben structures and increased volcanism. The East African Rift is an example of a continental rift zone with increased volcanism, while the Atlantic's spreading Mid-Ocean Ridge is host to an enormous amount of geothermal

431

The Enterprise Zone (Rhode Island)  

Broader source: Energy.gov [DOE]

The Enterprise Zone offers tax incentives to business expanding their workforce by 5% at facilities in designated enterprise zones. The tax credit is equal to 50% of the annual wages paid to a new...

432

Enterprise Zone | Open Energy Information  

Open Energy Info (EERE)

Zone Jump to: navigation, search This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleEnterpriseZone&oldid542697"...

433

The Galactic Habitable Zone  

SciTech Connect (OSTI)

We propose the concept of a "Galactic Habitable Zone" (GHZ). Similar to the circumstellar habitable zone (CHZ), the GHZ is that region in a spiral galaxy where life can exist. The width of the GHZ is controlled by two factors. The inner (closest to the center of the galaxy) limit is set by threats to complex life: nearby transient sources of ionizing radiation and comet impacts. Such threats tend to increase close to the galactic center. The outer limit is imposed by galactic chemical evolution, specifically the abundance of heavier elements. Observation of stars in the Milky Way galaxy suggests that the outer reaches of a spiral galaxy may be too poor in heavy elements to allow terrestrial complex life to exist.

Guillermo Gonzalez

2009-08-21T23:59:59.000Z

434

Alberta Health Services, Calgary Zone  

E-Print Network [OSTI]

Organizational Chart ­ AHS, Calgary Zone, Community, Rural and Mental Health Page 12 Organizational Chart ­ AHS, Calgary Zone, Addiction and Mental Health Page 13 Organizational Chart ­ AHS, Calgary Zone, Clinical specialty care clinics. 3) Increasing efficiency in our specialty clinics. 4) Standardizing care

Habib, Ayman

435

Site environmental report for calendar year 1997, Yucca Mountain Site, Nye County, Nevada  

SciTech Connect (OSTI)

This document is the seventh annual Site Environmental Report (SER) submitted by the Yucca Mountain Site Characterization Office (YMSCO) to describe the environmental program implemented by the US Department of Energy (DOE) at Yucca Mountain. As prescribed by the Nuclear Waste Policy Act (NWPA, 1982), this program ensures that site characterization activities are conducted in a manner that minimizes any significant adverse impacts to the environment and complies with all applicable laws and regulations. The most recent guidelines for the preparation of the SER place major emphasis on liquid and gaseous emissions of radionuclides, pollutants or hazardous substances; human exposure to radionuclides; and trends observed by comparing data collected over a period of years. To date, the YMP has not been the source of any radioactive emissions or been responsible for any human exposure to radionuclides. Minuscule amounts of radioactivity detected at the site are derived from natural sources or from dust previously contaminated by nuclear tests conducted in the past at the NTS. Because data for only a few years exist for the site, identification of long-term trends is not yet possible. Despite the lack of the aforementioned categories of information requested for the SER, the YMP has collected considerable material relevant to this report. An extensive environmental monitoring and mitigation program is currently in place and is described herein. Also, as requested by the SER guidelines, an account of YMP compliance with appropriate environmental legislation is provided.

NONE

1998-10-01T23:59:59.000Z

436

Implementation of Localized Corrosion in the Performance Assessment Model for Yucca Mountain  

SciTech Connect (OSTI)

A total system performance assessment (TSPA) model has been developed to analyze the ability of the natural and engineered barriers of the Yucca Mountain repository to isolate nuclear waste over the 10,000-year period following repository closure. The principal features of the engineered barrier system (EBS) are emplacement tunnels (or ''drifts'') containing a two-layer waste package (WP) for waste containment and a titanium drip shield to protect the waste package from seeping water and falling rock, The 20-mm-thick outer shell of the WP is composed of Alloy 22, a highly corrosion-resistant nickel-based alloy. The barrier function of the EBS is to isolate the waste from migrating water. The water and its associated chemical conditions eventually lead to degradation of the waste packages and mobilization of the radionuclides within the packages. There are five possible waste package degradation modes of the Alloy 22: general corrosion, microbially influenced corrosion, stress corrosion cracking, early failure due to manufacturing defects, and localized corrosion. This paper specifically examines the incorporation of the Alloy-22 localized corrosion model into the Yucca Mountain TSPA model, particularly the abstraction and modeling methodology, as well as issues dealing with scaling, spatial variability, uncertainty, and coupling to other sub-models that are part of the total system model.

Vivek Jain, S. David Sevougian, Patrick D. Mattie, Kevin G. Mon, and Robert J. Mackinnon

2006-04-30T23:59:59.000Z

437

Scenarios constructed for nominal flow in the presence of a repository at Yucca Mountain and vicinity  

SciTech Connect (OSTI)

Scenario development for the system performance assessment of the Yucca Mountain Site Characterization Project defines a scenario as a well-posed problem connecting an initiating event with radionuclide release to the accessible environment by a logical and physically possible combination or sequence of features, events, and processes. Drawing on the advice and assistance of the Project`s principal investigators (PIs), a collection of release scenarios initiated by the nominal ground-water flow occurring in the vicinity of the potential Yucca Mountain high-level-waste repository is developed and described in pictorial form. This collection of scenarios is intended to provide a framework to assist PIs in recognizing essential field and calculational analyses, to assist performance assessment in providing guidance to site characterization, and to continue the effort to exhaustively identify all features, events, and processes important to releases. It represents a step in the iterative process of identifying what details of the potential site are important for safe disposal. 67 refs.

Barr, G.E.; Hunter, R.L.; Dunn, E. [Sandia National Labs., Albuquerque, NM (United States); Flint, A. [Geological Survey, Mercury, NV (United States)

1995-03-01T23:59:59.000Z

438

A Fruit of Yucca Mountain: The Remote Waste Package Closure System  

SciTech Connect (OSTI)

Was the death of the Yucca Mountain repository the fate of a technical lemon or a political lemon? Without caution, this debate could lure us away from capitalizing on the fruits of the project. In March 2009, Idaho National Laboratory (INL) successfully demonstrated the Waste Package Closure System, a full-scale prototype system for closing waste packages that were to be entombed in the now abandoned Yucca Mountain repository. This article describes the system, which INL designed and built, to weld the closure lids on the waste packages, nondestructively examine the welds using four different techniques, repair the welds if necessary, mitigate crack initiating stresses in the surfaces of the welds, evacuate and backfill the packages with an inert gas, and perform all of these tasks remotely. As a nation, we now have a proven method for securely sealing nuclear waste packages for long term storage—regardless of whether or not the future destination for these packages will be an underground repository. Additionally, many of the system’s features and concepts may benefit other remote nuclear applications.

Kevin Skinner; Greg Housley; Colleen Shelton-Davis

2011-11-01T23:59:59.000Z

439

Site characterization progress report: Yucca Mountain, Nevada. Number 15, April 1--September 30, 1996  

SciTech Connect (OSTI)

During the second half of fiscal year 1996, activities at the Yucca Mountain Site Characterization Project (Project) supported the objectives of the revised Program Plan released this period by the Office of Civilian Radioactive Waste Management of the US Department of Energy (Department). Outlined in the revised plan is a focused, integrated program of site characterization, design, engineering, environmental, and performance assessment activities that will achieve key Program and statutory objectives. The plan will result in the development of a license application for repository construction at Yucca Mountain, if the site is found suitable. Activities this period focused on two of the three near-term objectives of the revised plan: updating in 1997 the regulatory framework for determining the suitability of the site for the proposed repository concept and providing information for a 1998 viability assessment of continuing toward the licensing of a repository. The Project has also developed a new design approach that uses the advanced conceptual design published during the last reporting period as a base for developing a design that will support the viability assessment. The initial construction phase of the Thermal Testing Facility was completed and the first phase of the in situ heater tests began on schedule. In addition, phase-one construction was completed for the first of two alcoves that will provide access to the Ghost Dance fault.

NONE

1997-04-01T23:59:59.000Z

440

Diet of desert tortoises at Yucca Mountain, Nevada, and implications for habitat reclamation  

SciTech Connect (OSTI)

The diet of desert tortoises at Yucca Mountain was assessed during 1992 to 1995 using a combination of feeding observations and scat analysis. Feeding observation data (1993 through 1995) showed that tortoises fed on a wide variety of items. The most frequently eaten items were forbs and annual grasses. These two forage groups comprised more than 90% of all bites taken. Analysis of scat (1992 and 1993) also showed that grasses and forbs were the most common groups, making up more than 80% of the composition of scat. Yearly differences between proportions of species in the diet were observed and were most likely attributable to differences in plant productivity, which is linked to rainfall patterns. Non-native species were an important component of the diet in all years, accounting for 13 to 50% of all bites observed and 6 to 24% of scat contents. A list of all items encountered in the diet is provided. To facilitate reclamation of desert tortoise habitat disturbed by the Yucca Mountain Site Characterization Project, native forage species that should be included in reclamation seed mixes, when feasible, were identified. Although shrubs make up only a small proportion of the diet, they should also be included in reclamation efforts because they provide habitat structure. Tortoise cover sites, and microhabitats amenable to seed germination and seedling establishment. In addition, non-native species should not be planted on reclaimed sites and, if necessary, sites should be recontoured and soil compaction reduced prior to planting.

Rakestraw, D.L.; Holt, E.A.; Rautenstrauch, K.R.

1995-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "unsaturated zone yucca" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Modeling studies of gas movement and moisture migration at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Modeling studies on moisture redistribution processes that are mediated by gas phase flow and diffusion have been carried out. The problem addressed is the effect of a lowered humidity of the soil gas at the land surface on moisture removal from Yucca Mountain, the potential site for a high-level nuclear waste repository. At the land surface, humid formation gas contacts much drier atmospheric air. Near this contact, the humidity of the soil gas may be considerably lower than at greater depth, where the authors expect equilibrium with the liquid phase and close to 100% humidity. The lower relative humidity of the soil gas may be modeled by imposing, at the land surface, an additional negative capillary suction corresponding to vapor pressure lowering according to Kelvin`s Equation, thus providing a driving force for the upward movement of moisture in both the vapor and liquid phases. Sensitivity studies show that moisture removal from Yucca Mountain arising from the lowered-relative-humidity boundary condition is controlled by vapor diffusion. There is much experimental evidence in the soil literature that diffusion of vapor is enhanced due to pore-level phase change effects by a few orders of magnitude. Modeling results presented here will account for this enhancement in vapor diffusion.

Tsang, Y.W.; Pruess, K. [Lawrence Berkeley Lab., CA (United States)

1991-06-01T23:59:59.000Z

442

Mechanical defradation of Emplacement Drifts at Yucca Mountain- A Modeling Case Study. Part I: Nonlithophysal Rock  

SciTech Connect (OSTI)

This paper outlines rock mechanics investigations associated with mechanical degradation of planned emplacement drifts at Yucca Mountain, which is the designated site for the proposed U.S. high-level nuclear waste repository. The factors leading to drift degradation include stresses from the overburden, stresses induced by the heat released from the emplaced waste, stresses due to seismically related ground motions, and time-dependent strength degradation. The welded tuff emplacement horizon consists of two groups of rock with distinct engineering properties: nonlithophysal units and lithophysal units, based on the relative proportion of lithophysal cavities. The term 'lithophysal' refers to hollow, bubble like cavities in volcanic rock that are surrounded by a porous rim formed by fine-grained alkali feldspar, quartz, and other minerals. Lithophysae are typically a few centimeters to a few decimeters in diameter. Part I of the paper concentrates on the generally hard, strong, and fractured nonlithophysal rock. The degradation behavior of the tunnels in the nonlithophysal rock is controlled by the occurrence of keyblocks. A statistically equivalent fracture model was generated based on extensive underground fracture mapping data from the Exploratory Studies Facility at Yucca Mountain. Three-dimensional distinct block analyses, generated with the fracture patterns randomly selected from the fracture model, were developed with the consideration of in situ, thermal, and seismic loads. In this study, field data, laboratory data, and numerical analyses are well integrated to provide a solution for the unique problem of modeling drift degradation.

M. Lin; D. Kicker; B. Damjanac; M. Board; M. Karakouzian

2006-07-05T23:59:59.000Z

443

Yucca Mountain transportation routes: Preliminary characterization and risk analysis; Volume 2, Figures [and] Volume 3, Technical Appendices  

SciTech Connect (OSTI)

This report presents appendices related to the preliminary assessment and risk analysis for high-level radioactive waste transportation routes to the proposed Yucca Mountain Project repository. Information includes data on population density, traffic volume, ecologically sensitive areas, and accident history.

Souleyrette, R.R. II; Sathisan, S.K.; di Bartolo, R. [Nevada Univ., Las Vegas, NV (United States). Transportation Research Center] [Nevada Univ., Las Vegas, NV (United States). Transportation Research Center

1991-05-31T23:59:59.000Z

444

Faulting in the Yucca Mountain region: Critical review and analyses of tectonic data from the central Basin and Range  

SciTech Connect (OSTI)

Yucca Mountain, Nevada, has been proposed as the potential site for a high-level waste (HLW) repository. The tectonic setting of Yucca Mountain presents several potential hazards for a proposed repository, such as potential for earthquake seismicity, fault disruption, basaltic volcanism, magma channeling along pre-existing faults, and faults and fractures that may serve as barriers or conduits for groundwater flow. Characterization of geologic structures and tectonic processes will be necessary to assess compliance with regulatory requirements for the proposed high level waste repository. In this report, we specifically investigate fault slip, seismicity, contemporary stain, and fault-slip potential in the Yucca Mountain region with regard to Key Technical Uncertainties outlined in the License Application Review Plan (Sections 3.2.1.5 through 3.2.1.9 and 3.2.2.8). These investigations center on (i) alternative methods of determining the slip history of the Bare Mountain Fault, (ii) cluster analysis of historic earthquakes, (iii) crustal strain determinations from Global Positioning System measurements, and (iv) three-dimensional slip-tendency analysis. The goal of this work is to assess uncertainties associated with neotectonic data sets critical to the Nuclear Regulatory Commission and the Center for Nuclear Waste Regulatory Analyses` ability to provide prelicensing guidance and perform license application review with respect to the proposed HLW repository at Yucca Mountain.

Ferrill, D.A.; Stirewalt, G.L.; Henderson, D.B.; Stamatakos, J.; Morris, A.P.; Spivey, K.H. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses; Wernicke, B.P. [California Inst. of Tech., Pasadena, CA (United States). Div. of Geological and Planetary Sciences

1996-03-01T23:59:59.000Z

445

Unsaturated Phosphazenes as Co-Solvents for Lithium-Ion Battery Electrolytes  

SciTech Connect (OSTI)

This paper covers the synthesis and use of a related family of cyclic phosphazene solvents containing terminal unsaturations. A brief synopsis on the synthesis and purification of these compounds is given. Data will be presented that covers physical and chemical properties of the phosphazenes as well as the properties when blended at various level with representative organic carbonate baseline solvents. Cycling data will be presented using commercially available electrode couples (LRMR/C) as well as studies focusing on cell performance at early lifetime as well as after repeated cycles. Conclusions regarding the effect of the unsaturated phosphazene compounds and their interaction with various alkyl carbonates, and their effect on cell performance will be presented.

Mason K Harrup; Harry W. Rollins; David K. Jamison; Eric J Dufek; Kevin L Gering; Thomas A Luther

2014-07-01T23:59:59.000Z

446

Liquid zone seal  

DOE Patents [OSTI]

A seal assembly that provides a means for establishing multiple pressure zones within a system. The seal assembly combines a plate extending from the inner wall of a housing or inner enclosure that intersects with and is immersed in the fluid contained in a well formed in a tray contained within the enclosure. The fluid is a low vapor pressure oil, chemically inert and oxidation resistant. The use of a fluid as the sealing component provides a seal that is self-healing and mechanically robust not subject to normal mechanical wear, breakage, and formation of cracks or pinholes and decouples external mechanical vibrations from internal structural members.

Klebanoff, Leonard E. (Dublin, CA)

2001-01-01T23:59:59.000Z

447

Does Water Content or Flow Rate Control Colloid Transport in Unsaturated Porous Media?  

SciTech Connect (OSTI)

Mobile colloids can play an important role in contaminant transport in soils: many contaminants exist in colloidal form, and colloids can facilitate transport of otherwise immobile contaminants. In unsaturated soils, colloid transport is, among other factors, affected by water content and flow rate. Our objective was to determine whether water content or flow rate is more important for colloid transport. We passed negatively charged polystyrene colloids (220 nm diameter) through unsaturated sand-filled columns under steady-state flow at different water contents (effective water saturations Se ranging from 0.1 to 1.0, with Se = (? – ?r)/(?s – ?r)) and flow rates (pore water velocities v of 5 and 10 cm/min). Water content was the dominant factor in our experiments. Colloid transport decreased with decreasing water content, and below a critical water content (Se < 0.1), colloid transport was inhibited, and colloids were strained in water films. Pendular ring and water film thickness calculations indicated that colloids can move only when pendular rings are interconnected. The flow rate affected retention of colloids in the secondary energy minimum, with less colloids being trapped when the flow rate increased. These results confirm the importance of both water content and flow rate for colloid transport in unsaturated porous media and highlight the dominant role of water content.

Thorsten Knappenberger; Markus Flury; Earl D. Mattson; James B. Harsh

2014-03-01T23:59:59.000Z

448

Performance of the Fluidized Bed Steam Reforming Product Under Hydraulically Unsaturated Conditions  

SciTech Connect (OSTI)

Currently, several candidates for secondary waste immobilization at the Hanford site in the State of Washington, USA are being considered. To demonstrate the durability of the product in the unsaturated Integrated Disposal Facility (IDF) at the site, a series of tests have been performed one of the candidate materials using the Pressurized Unsaturated Flow (PUF) system. The material that was tested was the Fluidized Bed Steam Reformer (FBSR) granular product and the granular product encapsulated in a geopolymer matrix. The FBSR product is composed primarily of an insoluble sodium aluminosilicate matrix with the dominant phases being feldspathoid minerals mostly nepheline, sodalite, and nosean. The PUF test method allows for the accelerated weathering of materials, including radioactive waste forms, under hydraulically unsaturated conditions, thus mimicking the open-flow and transport properties that most likely will be present at the IDF. The experiments show a trend of decreasing tracer release as a function of time for several of the elements released from the material including Na, Si, Al, and Cs. However, some of the elements, notably I and Re, show a steady release throughout the yearlong test. This result suggests that the release of these minerals from the sodalite cage occurs at a different rate compared with the dissolution of the predominant nepheline phase.

Neeway, James J.; Qafoku, Nikolla; Williams, Benjamin D.; Rod, Kenton A.; Bowden, Mark E.; Brown, Christopher F.; Pierce, Eric M.

2014-05-01T23:59:59.000Z

449

ATMOSPHERIC DISPERSAL AND DEPOSITION OF TEPHRA FROM A POTENTIAL VOLCANIC ERUPTION AT YUCCA MOUNTAIN, NEVADA  

SciTech Connect (OSTI)

The purpose of this model report is to provide documentation of the conceptual and mathematical model (Ashplume) for atmospheric dispersal and subsequent deposition of ash on the land surface from a potential volcanic eruption at Yucca Mountain, Nevada. This report also documents the ash (tephra) redistribution conceptual model. These aspects of volcanism-related dose calculation are described in the context of the entire igneous disruptive events conceptual model in ''Characterize Framework for Igneous Activity'' (BSC 2004 [DIRS 169989], Section 6.1.1). The Ashplume conceptual model accounts for incorporation and entrainment of waste fuel particles associated with a hypothetical volcanic eruption through the Yucca Mountain repository and downwind transport of contaminated tephra. The Ashplume mathematical model describes the conceptual model in mathematical terms to allow for prediction of radioactive waste/ash deposition on the ground surface given that the hypothetical eruptive event occurs. This model report also describes the conceptual model for tephra redistribution from a basaltic cinder cone. Sensitivity analyses and model validation activities for the ash dispersal and redistribution models are also presented. Analyses documented in this model report update the previous documentation of the Ashplume mathematical model and its application to the Total System Performance Assessment (TSPA) for the License Application (TSPA-LA) igneous scenarios. This model report also documents the redistribution model product outputs based on analyses to support the conceptual model. In this report, ''Ashplume'' is used when referring to the atmospheric dispersal model and ''ASHPLUME'' is used when referencing the code of that model. Two analysis and model reports provide direct inputs to this model report, namely ''Characterize Eruptive Processes at Yucca Mountain, Nevada and Number of Waste Packages Hit by Igneous Intrusion''. This model report provides direct inputs to the TSPA, which uses the ASHPLUME software described and used in this model report. Thus, ASHPLUME software inputs are inputs to this model report for ASHPLUME runs in this model report. However, ASHPLUME software inputs are outputs of this model report for ASHPLUME runs by TSPA.

C. Harrington

2004-10-25T23:59:59.000Z

450

Identification of structures, systems, and components important to safety at the potential repository at Yucca Mountain; Yucca Mountain Site Characterization Project  

SciTech Connect (OSTI)

This study recommends which structures, systems, and components of the potential repository at Yucca Mountain are important to safety. The assessment was completed in April 1990 and uses the reference repository configuration in the Site Characterization Plan Conceptual Design Report and follows the methodology required at that time by DOE Procedure AP6.10-Q. Failures of repository items during the preclosure period are evaluated to determine the potential offsite radiation doses and associated probabilities. Items are important to safety if, in the event they fail to perform their intended function, an accident could result which causes a dose commitment greater than 0.5 rem to the whole body or any organ of an individual in an unrestricted area. This study recommends that these repository items include the structures that house spent fuel and high-level waste, the associated filtered ventilation exhaust systems, certain waste- handling equipment, the waste containers, the waste treatment building structure, the underground waste transporters, and other items listed in this report. This work was completed April 1990. 27 refs., 7 figs., 9 tabs.

Hartman, D.J.; Miller, D.D. [Bechtel National, Inc., San Francisco, CA (United States); Klamerus, L.J. [Sandia National Labs., Albuquerque, NM (United States)

1991-10-01T23:59:59.000Z

451

Characterization, propagation and analysis of aleatory and epistemic uncertainty in the 2008 performance assessment for the proposed repository for high-level radioactive waste at Yucca Mountain, Nevada  

Science Journals Connector (OSTI)

The 2008 performance assessment (PA) for the proposed repository for high-level radioactive waste at Yucca Mountain (YM), Nevada, illustrates the conceptual structure of risk assessments for complex systems. The 2008 YM PA is based on the following three ...

Clifford W. Hansen; Jon C. Helton; Cédric J. Sallaberry

2010-09-01T23:59:59.000Z

452

Quasi-three dimensional ground-water modeling of the hydrologic influence of paleozoic rocks on the ground-water table at Yucca Mountain, Nevada.  

E-Print Network [OSTI]

??The proposed high-level radioactive waste repository site at Yucca Mountain, Nevada, has created a need to understand the, ground-water system at the site. One of… (more)

Lee, Si-Yong

2012-01-01T23:59:59.000Z

453

Western Renewable Energy Zones (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes recent developments and trends pertaining to competitive renewable energy zones, transmission planning and the integration of renewable generation resources.

Hein, J.

2011-06-01T23:59:59.000Z

454

DOE to Send Proposed Yucca Mountain Legislation to Congress | Department of  

Broader source: Energy.gov (indexed) [DOE]

April 4, 2006 - 10:03am April 4, 2006 - 10:03am Addthis WASHINGTON, DC - Secretary of Energy Samuel W. Bodman today announced that on Wednesday, April 5, he will send to the U.S. Congress a legislative proposal to enhance the nation's ability to manage and dispose of spent nuclear fuel and high-level radioactive waste. Submission of this legislation fulfills a commitment contained in President Bush's Fiscal Year 2007 budget. "We need to ensure a strong and diversified energy mix to fuel our nation's economy, and nuclear power is an important component of that mix," Secretary Bodman said. "In order to expand our nuclear generating capacity, we need a safe, permanent, geologic repository for spent nuclear fuel at Yucca Mountain. This proposed legislation will help provide

455

Coupled In-Rock and In-Drift Hydrothermal Model Stuudy For Yucca Mountain  

SciTech Connect (OSTI)

A thermal-hydrologic-natural-ventilation model is configured for simulating temperature, humidity, and condensate distributions in the coupled domains of the in-drift airspace and the near-field rockmass in the proposed Yucca Mountain repository. The multi-physics problem is solved with MULTIFLUX in which a lumped-parameter computational fluid dynamics model is iterated with TOUGH2. The solution includes natural convection, conduction, and radiation for heat as well as moisture convection and diffusion for moisture transport with half waste package scale details in the drift, and mountain-scale heat and moisture transport in the porous and fractured rock-mass. The method provides fast convergence on a personal computer computational platform. Numerical examples and comparison with a TOUGH2 based, integrated model are presented.

G. Danko; J. Birkholzer; D. Bahrami

2006-12-18T23:59:59.000Z