Powered by Deep Web Technologies
Note: This page contains sample records for the topic "tracer prep blanks" 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

Test Preparation Options Free Test Prep Websites  

E-Print Network [OSTI]

Test Preparation Options Free Test Prep Websites ACT: http: http://www.collegeboard.com/student/testing/sat/prep_one/test.html http://www.number2.com://testprep.princetonreview.com/CourseSearch/Search.aspx?itemCode=17&productType=F&rid=1&zip=803 02 Test Prep Classes Front Range Community College: Classes

Stowell, Michael

2

Safety System Oversight Staffing Analysis (Instructions, Blank...  

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

Safety System Oversight Staffing Analysis (Instructions, Blank Sheet and Example Sheet) Safety System Oversight Staffing Analysis (Instructions, Blank Sheet and Example Sheet) This...

3

PREP  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNationalRestart of the Review of theOFFICE OF CIVIL RIGHTS/%2A en OversightF1/%2A en

4

Production Risk Evaluation Program (PREP) - summary  

SciTech Connect (OSTI)

Nuclear weapons have been produced in the US since the early 1950s by a network of contractor-operated Department of Energy (DOE) facilities collectively known as the Nuclear Weapon Complex (NWC). Recognizing that the failure of an essential process might stop weapon production for a substantial period of time, the DOE Albuquerque Operations office initiated the Production Risk Evaluation Program (PREP) at Sandia National Laboratories (SNL) to assess quantitatively the potential for serious disruptions in the NWC weapon production process. PREP was conducted from 1984-89. This document is an unclassified summary of the effort.

Kjeldgaard, E.A.; Saloio, J.H.; Vannoni, M.G.

1997-03-01T23:59:59.000Z

5

MSU Faculty Advisor's Checklist Prepping for Advising  

E-Print Network [OSTI]

MSU Faculty Advisor's Checklist Prepping for Advising Ã? Read the Advising chapter in the New Faculty Handbook and "Reminders for Advisors" flyer. Ã? Get to know the Advisor's Toolkit. Ã? Look over semester (in Advisor's Toolkit). Ã? Become familiar with Advisor Dashboard (MyInfo>Secure Area

Dyer, Bill

6

TAMU Online ESL Certification Prep Course  

E-Print Network [OSTI]

SSI) and Title III funds through the Texas Education Agency. Department of Educational Psychology College of Education & Human Development Texas A&M University Presentation Overview ? Online ESL Certification Course?Overview ? Course... ESL Certification Prep Course Department of Educational Psychology College of Education & Human Development Texas A&M University Funding Source This training is made possible by the Limited English Proficient, Student Success Initiative (LEP...

Lara-Alecio, Rafael; Treviño, Polly; Tong, Fuhui

2010-10-22T23:59:59.000Z

7

JLab's Science Education Website Helps Students Prep for 2006...  

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

JLab's Science Education Website Helps Students Prep for 2006 Standards of Learning Tests March 28, 2006 The use of Jefferson Lab's Science Education website is climbing as...

8

LCLS Prep Lab Images | Sample Preparation Laboratories  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and Interfaces Sample Environment: Magnet and6 th7525T HE FLCLSLCLS Prep Lab

9

RDS and Recycling Waste Diversion in Food Prep  

E-Print Network [OSTI]

RDS and Recycling Waste Diversion in Food Prep Setting #12;Why Recycle? Recycling saves resources Recycling one ton of paper saves 17 trees! Recycling saves energy Recycling one aluminum can saves enough energy to power a television for 3 hours! Recycling is easy There are 4 waste categories here at UM

Awtar, Shorya

10

Is It Possible To Clone Using An Arbitrary Blank State?  

E-Print Network [OSTI]

We show that in a cloning process, whether deterministic inexact or probabilistic exact, one can take an arbitrary blank state while still using a fixed cloning machine.

Anirban Roy; Aditi Sen; Ujjwal Sen

2001-11-29T23:59:59.000Z

11

Blank fire configuration for automatic pistol  

DOE Patents [OSTI]

A pistol configured to fire blank cartridges includes a modified barrel with a breech portion connected to an aligned inner sleeve. Around the inner sleeve, there is disposed an outer sleeve having a vent therein through which the cartridge discharges. The breech portion is connected to a barrel anchor to move backward in a slight arc when the pistol is fired. A spring retention rod projects from the barrel anchor and receives a shortened recoil spring therearound which recoil spring has one end abutting a stop on the barrel anchor and the other end in abutment with the end of a spring retaining cup. The spring retaining cup is engaged by a flange projecting from a slide so that when the pistol is fired, the slide moves rearwardly against the compression of the spring to eject the spent cartridge and then moves forwardly under the urging of the spring to load a fresh cartridge into the breech portion. The spring then returns all of the slidable elements to their initial position so that the pistol may again be fired.

Teague, Tommy L. (Albuquerque, NM)

1990-01-01T23:59:59.000Z

12

[Page Intentionally Left Blank] Life Cycle Greenhouse Gas Emissions from  

E-Print Network [OSTI]

..........................................................................11 4.2 Conventional Jet Fuel from Crude Oil2 June #12;[Page Intentionally Left Blank] #12;Life Cycle Greenhouse Gas Emissions from Alternative .......................................5 3.1 Life cycle Greenhouse Gas Emissions

Reuter, Martin

13

Biological tracer method  

DOE Patents [OSTI]

The present invention is a biological tracer method for characterizing the movement of a material through a medium, comprising the steps of: introducing a biological tracer comprising a microorganism having ice nucleating activity into a medium; collecting at least one sample of the medium from a point removed from the introduction point; and analyzing the sample for the presence of the biological tracer. The present invention is also a method for using a biological tracer as a label for material identification by introducing a biological tracer having ice nucleating activity into a material, collecting a sample of a portion of the labelled material and analyzing the sample for the presence of the biological tracer. 2 figs.

Strong-Gunderson, J.M.; Palumbo, A.V.

1998-09-15T23:59:59.000Z

14

Biological tracer method  

DOE Patents [OSTI]

The present invention is a biological tracer method for characterizing the movement of a material through a medium, comprising the steps of: introducing a biological tracer comprising a microorganism having ice nucleating activity into a medium; collecting at least one sample of the medium from a point removed from the introduction point; and analyzing the sample for the presence of the biological tracer. The present invention is also a method for using a biological tracer as a label for material identification by introducing a biological tracer having ice nucleating activity into a material, collecting a sample of a portion of the labelled material and analyzing the sample for the presence of the biological tracer.

Strong-Gunderson, Janet M. (Ten Mile, TN); Palumbo, Anthony V. (Oak Ridge, TN)

1998-01-01T23:59:59.000Z

15

CHAPTER II GEOLOGY Blank page retained for pagination  

E-Print Network [OSTI]

CHAPTER II GEOLOGY #12;Blank page retained for pagination #12;SHORELINES AND COASTS OF THE GULF or discordant with the grain (dominant trend) of the geologic structures of a coastal regi?n, but King (1942, pIOnal geology, geomorphology, sedimentation, oceanography of the inshore zone, meteorology, climatology, biol

16

POLLUTION OF WATER Blank page retained for pagination  

E-Print Network [OSTI]

CHAPTER XX POLLUTION OF WATER #12;Blank page retained for pagination #12;ASPECTS OF WATER POLLUTION IN THE COASTAL AREA OF THE GULF OF MEXICOl Prepared in the DIVISION of WATER POLLUTION CONTROL and SHELLFISH, and Welfare Principal natural resources of the Gulf that ap- pear susceptible to damages from water pollution

17

Blank optimization in sheet metal forming using finite element simulation  

E-Print Network [OSTI]

The present study aims to determine the optimum blank shape design for the deep drawing of arbitrary shaped cups with a uniform trimming allowance at the flange i.e. cups without ears. This earing defect is caused by planar anisotropy in the sheet...

Goel, Amit

2006-04-12T23:59:59.000Z

18

Fair Nuclear Museum Blank Nanosize Me Camp Visits CHTM  

E-Print Network [OSTI]

Fair Nuclear Museum Blank Outreach Nanosize Me Camp Visits CHTM By Stefi Weisburd - July 18, 2013 Campers from the National Museum of Nuclear Science and History's Nanosize Me camp visited CHTM labs and the museum. Students, faculty & staff show Nuclear Museum summer campers nanoscience labs at the Center

New Mexico, University of

19

This Page Intentionally Left Blank Next-Generation Ecosystem Experiments (NGEE Arctic)  

E-Print Network [OSTI]

Lincoln #12;This Page Intentionally Left Blank #12;#12;Next-Generation Ecosystem Experiments--Arctic iv#12;This Page Intentionally Left Blank #12;Next-Generation Ecosystem Experiments (NGEE Arctic This Page Intentionally Left Blank #12;Next-Generation Ecosystem Experiments--Arctic Contents v CONTENTS

20

Mechanical Properties of Aluminum Tailor Welded Blanks at Superplastic Temperatures  

SciTech Connect (OSTI)

This paper describes an investigation of the mechanical properties of weld material in aluminum tailor welded blanks (TWB) at superplastic temperatures and discusses the potential application of TWBs in superplastic forming operations. Aluminum TWBs consist of multiple sheet materials of different thickness or alloy that are butt-welded together into a single, variable thickness blank. To evaluate the performance of the weld material in TWBs, a series of tensile tests were conducted at superplastic temperatures with specimens that contained weld material in the gage area. The sheet material used in the study was Sky 5083 aluminum alloy, which was joined to produce the TWBs by gas tungsten arc welding using an AA5356 filler wire. The experimental results show that, in the temperature range of 500?C to 550?C and at strain rates ranging from 10-4 sec-1 to 10-2 sec-1, the weld material has a higher flow stress and lower ductility than the monolithic sheet material. The weld material exhibited elongations of 40% to 60% under these conditions, whereas the monolithic sheet achieved 220% to 360% elongation. At the same temperatures and strain rates, the weld material exhibited flow stresses 1.3 to 4 times greater than the flow stress in the monolithic sheet. However, the weld material did show a substantial increase in the strain rate sensitivity and ductility when compared to the same material formed at room temperature.

Davies, Richard W.; Vetrano, John S.; Smith, Mark T.; Pitman, Stan G.

2002-10-06T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Tracers and Tracer Testing: Design, Implementation, Tracer Selection, and Interpretation Methods  

SciTech Connect (OSTI)

Conducting a successful tracer test requires adhering to a set of steps. The steps include identifying appropriate and achievable test goals, identifying tracers with the appropriate properties, and implementing the test as designed. When these steps are taken correctly, a host of tracer test analysis methods are available to the practitioner. This report discusses the individual steps required for a successful tracer test and presents methods for analysis. The report is an overview of tracer technology; the Suggested Reading section offers references to the specifics of test design and interpretation.

G. Michael Shook; Shannon L.; Allan Wylie

2004-01-01T23:59:59.000Z

22

E-Print Network 3.0 - adopting variable blank Sample Search Results  

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

cgicontentfull319585975DC1 Supporting Online Material for Summary: blank aerogel chips, flown aerogel chips and two fragments of bulbous aerogel. The first...

23

E-Print Network 3.0 - aluminium tailored blanks Sample Search...  

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

France from 3-5 September 2008 1 Summary: : Superplastic Forming, SPF, Friction Stir Welding, FSW, titanium, 6Al-4V, aluminium, 5083, tailored blank... , Mechanical Properties of...

24

Black Bear Prep plant replaces high-frequency screens with fine wire sieves  

SciTech Connect (OSTI)

At the Black Bear prep plant (near Wharncliffe, WV, USA) the clean coal from the spirals traditionally reported to high-frequency screens, which removed high-ash clay fines. Screens have inherent inefficiencies that allow clean coal to report to the screen underflow. The goal of this project was to capture the maximum amount of spiral clean coal while still removing the high-ash clay material found in the spiral product. The reduction of the circulating load and plant downtime for unscheduled maintenance were projected as additional benefits. After the plant upgrade, the maintenance related to the high frequency screens was eliminated and an additional 2.27 tons per hour (tph) of fine coal was recovered, which resulted in a payback period of less than one year. The article was adapted from a paper presented at Coal Prep 2007 in April 2007, Lexington, KY, USA. 1 ref., 1 fig., 1 tab.

Barbee, C.J.; Nottingham, J.

2007-12-15T23:59:59.000Z

25

Tracer airflow measurement system (TRAMS)  

DOE Patents [OSTI]

A method and apparatus for measuring fluid flow in a duct is disclosed. The invention uses a novel high velocity tracer injector system, an optional insertable folding mixing fan for homogenizing the tracer within the duct bulk fluid flow, and a perforated hose sampling system. A preferred embodiment uses CO.sub.2 as a tracer gas for measuring air flow in commercial and/or residential ducts. In extant commercial buildings, ducts not readily accessible by hanging ceilings may be drilled with readily plugged small diameter holes to allow for injection, optional mixing where desired using a novel insertable foldable mixing fan, and sampling hose.

Wang, Duo (Albany, CA)

2007-04-24T23:59:59.000Z

26

This page intentionally left blank. California Solar Initiative, CPUC Staff Progress Report, April 2008 2  

E-Print Network [OSTI]

.15 California Solar Initiative Supported Strong Statewide Grid-Installed Capacity Progress in 2007#12;This page intentionally left blank. California Solar Initiative, CPUC Staff Progress Report................................................................................................................ 5 2. Go Solar California! Overview

27

chmod 660 facebook: Friendsourcing Social Network Sites First Author Name (Blank if Blind Review)  

E-Print Network [OSTI]

chmod 660 facebook: Friendsourcing Social Network Sites First Author Name (Blank if Blind Review and to draw the users back into the site, we friendsource Facebook, enabling active contributors Facebook applications, friendsourcing, social computing, online participation ACM Classification Keywords H

28

Houston Pre-Freshman Enrichment Program (Houston PREP). Final report, June 9, 1997--July 25, 1997  

SciTech Connect (OSTI)

The 1997 Houston Pre-Freshman Enrichment Program (PREP) was conducted at the campus of the University of Houston-Downtown from June 9 to July 25, 1997. Program participants were recruited from the Greater Houston Area. All participants were identified as high-achieving students with an interest in learning about the engineering and science professions. The goal of the program was to better prepare our pre-college youth prior to entering college as mathematics, science and engineering majors. The program participants were middle school and high school students from the Aldine, Alief, Channel View, Clear Creek, Cypress-Fairbanks, Fort Bend, Galena Park, Houston, Humble, Katy, Klein, North Forest, Pasadena, Private, and Spring Branch Independent School Districts. Of the 194 students starting the program, 165 students were from economically and socially disadvantage groups under-represented in the engineering and science professions, and 118 of the 194 were women. Our First Year group for 1997 composed of 96% minority and women students. Second and Third Year students combined were 96% minority or women. With financial support from the Center for Computational Sciences and Advanced Distributed Simulation, the Fourth Year Program was added to PREP this year. Twelve students completed the program (83% minority or women).

NONE

1997-10-01T23:59:59.000Z

29

Rauchfuss Group Prep of Fe2S2(CO)6 Large Scale Synthesis of Fe2S2(CO)6.  

E-Print Network [OSTI]

Rauchfuss Group Prep of Fe2S2(CO)6 Large Scale Synthesis of Fe2S2(CO)6. A three neck, 5-liter round was filtered though a small plug of Celite to remove elemental sulfur. Solvent was removed, and the solid and reduced pressure. We do not recommend sublimation as a method of purification. IR (pentanes): 2084 (s

Rauchfuss, Thomas B.

30

Tracer Methods for Characterizing Fracture Stimulation in Engineered...  

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

Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS) Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal...

31

Creating a poster using Powerpoint: Psych 330 [ Once you open Powerpoint, you want to work with a blank slide.  

E-Print Network [OSTI]

with a blank slide. FORMAT: Slide Layout: Blank [ You poster will consist of just this one slide. Before adding content to the slide, set the poster size by clicking FILE: Page Setup: size: custom width: 24 height: 20 area, just click "OK" (don't click "fix"!) [ You'll want to work with your slide in Slide View mode

32

Multiple-tracer gas analyzer  

SciTech Connect (OSTI)

A multi-gas tracer system has been designed, built, and used on an explosively fractured oil shale rubble bed. This paper deals exclusively with the hardware, software, and overall operation of the tracer system. This system is a field portable, self-contained unit, which utilizes a mass spectrometer for gas analysis. The unit has a 20 channel sample port capability and is controlled by a desk top computer. The system is configured to provide a dynamic sensitivity range of up to six orders of magnitude. A roots blower is manifolded to the unit to provide continuous flow in all sample lines. The continuous flow process allows representative samples as well as decreasing the time between each measurement. Typical multiplex cycle time to evaluate four unique gases is approximately 12 seconds.

Uhl, J.E.

1982-01-01T23:59:59.000Z

33

Mogens Blanke Adjunct Professor at Centre for Ships and Ocean Structures, NTNU, Norway  

E-Print Network [OSTI]

Mogens Blanke Adjunct Professor at Centre for Ships and Ocean Structures, NTNU, Norway Professor;DTU, Denmark & CeSOS, NTNU, Norway Position Mooring ­ essential in offshore Mooring lines provide deflection max 4-6 % of depth Abortion is extremely critical #12;DTU, Denmark & CeSOS, NTNU, Norway Diagnosis

Nørvåg, Kjetil

34

Radiological Habits Survey: Torness, 2006 This page has been intentionally left blank  

E-Print Network [OSTI]

intentionally left blank #12;3 SUMMARY 5 1. INTRODUCTION 6 1.1 Regulation of radioactive waste discharges 6 1 vegetables in the Torness area (kg/y) Table 20. Adults' consumption rates of potato in the Torness area (kg

35

A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene...  

Open Energy Info (EERE)

Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene Sulfonate as a Liquid-Phase Tracer at the Coso Geothermal Field Jump to: navigation, search OpenEI Reference LibraryAdd...

36

Method for fabricating an ultra-low expansion mask blank having a crystalline silicon layer  

DOE Patents [OSTI]

A method for fabricating masks for extreme ultraviolet lithography (EUVL) using Ultra-Low Expansion (ULE) substrates and crystalline silicon. ULE substrates are required for the necessary thermal management in EUVL mask blanks, and defect detection and classification have been obtained using crystalline silicon substrate materials. Thus, this method provides the advantages for both the ULE substrate and the crystalline silicon in an Extreme Ultra-Violet (EUV) mask blank. The method is carried out by bonding a crystalline silicon wafer or member to a ULE wafer or substrate and thinning the silicon to produce a 5-10 .mu.m thick crystalline silicon layer on the surface of the ULE substrate. The thinning of the crystalline silicon may be carried out, for example, by chemical mechanical polishing and if necessary or desired, oxidizing the silicon followed by etching to the desired thickness of the silicon.

Cardinale, Gregory F. (Oakland, CA)

2002-01-01T23:59:59.000Z

37

Use of non-quadratic yield surfaces in design of optimal deep-draw blank geometry  

SciTech Connect (OSTI)

Planar anisotropy in the deep-drawing of sheet can lead to the formation of ears in cylindrical cups and to undesirable metal flow in the blankholder in the general case. For design analysis purposes in non-linear finite-element codes, this anisotropy is characterized by the use of an appropriate yield surface which is then implemented into codes such as DYNA3D . The quadratic Hill yield surface offers a relatively straightforward implementation and can be formulated to be invariant to the coordinate system. Non-quadratic yield surfaces can provide more realistic strength or strain increment ratios, but they may not provide invariance and thus demand certain approximations. Forms due to Hosford and Badat et al. have been shown to more accurately address the earning phenomenon. in this work, use is made of these non-quadratic yield surfaces in order to determine the optimal blank shape for cups and other shapes using ferrous and other metal blank materials with planar anisotropy. The analyses are compared to previous experimental studies on non-uniform blank motion due to anisotropy and asymmetric geometry.

Logan, R.W.

1995-12-01T23:59:59.000Z

38

An Emergent Framework for Self-Motivation in Developmental Robotics James B. Marshall Douglas Blank Lisa Meeden  

E-Print Network [OSTI]

An Emergent Framework for Self-Motivation in Developmental Robotics James B. Marshall Douglas Blank Swarthmore College Claremont, CA 91711 Bryn Mawr, PA 19010 Swarthmore, PA 19081 marshall@cs.pomona.edu dblank

Meeden, Lisa A.

39

Tracer Methods for Characterizing Fracture Creation in Enhanced...  

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

Tracer Methods for Characterizing Fracture Creation in Enhanced Geothermal Systems; 2010 Geothermal Technology Program Peer Review Report Tracer Methods for Characterizing Fracture...

40

Tracer Methods for Characterizing Fracture Stimulation in Enhanced...  

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

Tracer Methods for Characterizing Fracture Stimulation in Enhanced Geothermal Systems (EGS); 2010 Geothermal Technology Program Peer Review Report Tracer Methods for Characterizing...

Note: This page contains sample records for the topic "tracer prep blanks" 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

Validation of Geothermal Tracer Methods in Highly Constrained...  

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

of Research Hypothesis: Smart tracers can measure potential heat exchange between fracture and rock mass Hypothesis Test: A tracer test proving ground System must be simple...

42

Advancing reactive tracer methods for measuring thermal evolution...  

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

Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and FractureHeat Transfer Surface Area in Geothermal Reservoirs Quantum Dot Tracers for Use in...

43

Blank Portrait  

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

would enable storage projects to obtain long term contracts as it did for the wind and solar industry. In California, where the PUC has mandated utilities to procure 1.3 GWs of...

44

Blank Portrait  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomenthe HouseStudents Heal the LandRemarks as PreparedFinal Report on thein

45

Using Biofuel Tracers to Study Alternative Combustion Regimes  

E-Print Network [OSTI]

Section B (NIMB) Using Biofuel Tracers to Study Alternativeinjection. We investigate biofuel HCCI combustion, and use

Mack, John Hunter; Flowers, Daniel L.; Buchholz, Bruce A.; Dibble, Robert W.

2006-01-01T23:59:59.000Z

46

Protein Expression and Purification 23, 311318 (2001) doi:10.1006/prep.2001.1508, available online at http://www.idealibrary.com on  

E-Print Network [OSTI]

Protein Expression and Purification 23, 311­318 (2001) doi:10.1006/prep.2001.1508, available online aggregation but is not pyranoside. Insertion of a small oligopeptide (13 amino required for biological. the highest levels (20­22% of total proteins) with the E. coli has been the workhorse for the large-scale

47

Thermal Stability of Chelated Indium Activable Tracers  

SciTech Connect (OSTI)

The thermal stability of indium tracer chelated with organic ligands ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA) was measured for reservoir temperatures of 150, 200, and 240 C. Measurements of the soluble indium concentration was made as a function of time by neutron activation analysis. From the data, approximate thermal decomposition rates were estimated. At 150 C, both chelated tracers were stable over the experimental period of 20 days. At 200 C, the InEDTA concentration remained constant for 16 days, after which the thermal decomposition occurred at a measured rate constant of k = 0.09 d{sup -1}. The thermal decomposition of InNTA at 200 C showed a first order reaction with a measured rate constant of k = 0.16 d{sup -1}. At 240 C, both indium chelated tracers showed rapid decomposition with rate constants greater than 1.8 d{sup -1}. The data indicate that for geothermal reservoir with temperatures up to about 200 C, indium chelated tracers can be used effectively for transit times of at least 20 days. These experiments were run without reservoir rock media, and do not account for concomitant loss of indium tracer by adsorption processes.

Chrysikopoulos, Costas; Kruger, Paul

1986-01-21T23:59:59.000Z

48

Enhanced Oil Recovery: Aqueous Flow Tracer Measurement  

SciTech Connect (OSTI)

A low detection limit analytical method was developed to measure a suite of benzoic acid and fluorinated benzoic acid compounds intended for use as tracers for enhanced oil recovery operations. Although the new high performance liquid chromatography separation successfully measured the tracers in an aqueous matrix at low part per billion levels, the low detection limits could not be achieved in oil field water due to interference problems with the hydrocarbon-saturated water using the system's UV detector. Commercial instrument vendors were contacted in an effort to determine if mass spectrometry could be used as an alternate detection technique. The results of their work demonstrate that low part per billion analysis of the tracer compounds in oil field water could be achieved using ultra performance liquid chromatography mass spectrometry.

Joseph Rovani; John Schabron

2009-02-01T23:59:59.000Z

49

E-Print Network 3.0 - atmospheric tracer experiments Sample Search...  

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

Collection: Geosciences 11 The University of Reading Helen Dacre Evaluating pollution transport in Summary: study Tracer experiments NAME tracer analysis UM tracer...

50

Method of dispersing particulate aerosol tracer  

DOE Patents [OSTI]

A particulate aerosol tracer which comprises a particulate carrier of sheet silicate composition having a particle size up to one micron, and a cationic dopant chemically absorbed in solid solution in the carrier. The carrier is preferably selected from the group consisting of natural mineral clays such as bentonite, and the dopant is selected from the group consisting of rare earth elements and transition elements. The tracers are dispersed by forming an aqueous salt solution with the dopant present as cations, dispersing the carriers in the solution, and then atomizing the solution under heat sufficient to superheat the solution droplets at a level sufficient to prevent reagglomeration of the carrier particles.

O'Holleran, Thomas P. (Belleville, MI)

1988-01-01T23:59:59.000Z

51

Geologic flow characterization using tracer techniques  

SciTech Connect (OSTI)

A new tracer flow-test system has been developed for in situ characterization of geologic formations. This report describes two sets of test equipment: one portable and one for testing in deep formations. Equations are derived for in situ detector calibration, raw data reduction, and flow logging. Data analysis techniques are presented for computing porosity and permeability in unconfined isotropic media, and porosity, permeability and fracture characteristics in media with confined or unconfined two-dimensional flow. The effects of tracer pulse spreading due to divergence, dispersion, and porous formations are also included.

Klett, R. D.; Tyner, C. E.; Hertel, Jr., E. S.

1981-04-01T23:59:59.000Z

52

Chelated Indium Activable Tracers for Geothermal Reservoirs  

E-Print Network [OSTI]

Center (SLAC), for providing the califclmiurh-252 neutron source. Appreciation is extended to Lew, rock size, and temperature on the tracer adsoqjtion and ther- mal degradation. The rock employed for these measurements was gragwacke, a prek valent rock type at The Geysers, California geothermal field. The re

Stanford University

53

Tracer Interpretation Using Temporal Moments on a Spreadsheet  

SciTech Connect (OSTI)

This report presents a method for interpreting geothermal tracer tests. The method is based on the first temporal moment (mean residence time) of the tracer in the subsurface. The individual steps required to interpret a tracer test are reviewed and discussed. And an example tracer test directs the user through the interpretation method. An Excel spreadsheet application of the interpretation method is a companion document to this report.

G. Michael Shook; J. Hope Forsmann

2005-06-01T23:59:59.000Z

54

Validation of Geothermal Tracer Methods in Highly Constrained Field Experiments  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Project Summary. This project will test smartdiffusive tracers for measuring heat exchange.

55

Velocity Interferometer blanking due to preheating in a double pulse planar experiment  

SciTech Connect (OSTI)

Optical diagnostics, such as VISAR (Velocity Interferometer System for Any Reflector) or SOP (Streaked Optical Pyrometry), have become essential in shock timing experiments. Their high precision allows for accurate measurements of shock velocities, chronometry, and brightness temperature. However, in some instances, these measurements can be compromised. In planar shock coalescence experiments recently performed at the LULI facility [Baton et al., Phys. Rev. Lett. 108, 195002 (2012)], VISAR signal loss was observed. In these experiments, a strong shock launched by a high-intensity spike catches up with a previously shock launched by an earlier, low-intensity beam. The disappearance of the VISAR signal is attributed to a preheating of the coronal plasma by x-rays generated by the high intensity spike. The signal does not disappear if the high-intensity spike starts after VISAR probe beam begins to reflect off of the first shock. The VISAR diagnostic, modeled using an assessment of the optical index in quartz, compares favorably to experimental results. This provides evidence that x-ray preheating can cause blanking of the VISAR signal in quartz.

Laffite, S.; Combis, P.; Clerouin, J.; Recoules, V.; Rousseaux, C.; Videau, L. [CEA, DAM, DIF, F-91297 Arpajon (France); Baton, S. D.; Koenig, M. [LULI, Ecole Polytechnique, CNRS, CEA, UPMC, route de Saclay, 91128 Palaiseau (France)

2014-08-15T23:59:59.000Z

56

Asian Tracer Experiment and Atmospheric Modeling (TEAM) Project: Draft Field Work Plan for the Asian Long-Range Tracer Experiment  

SciTech Connect (OSTI)

This report provides an experimental plan for a proposed Asian long-range tracer study as part of the international Tracer Experiment and Atmospheric Modeling (TEAM) Project. The TEAM partners are China, Japan, South Korea and the United States. Optimal times of year to conduct the study, meteorological measurements needed, proposed tracer release locations, proposed tracer sampling locations and the proposed durations of tracer releases and subsequent sampling are given. Also given are the activities necessary to prepare for the study and the schedule for completing the preparation activities leading to conducting the actual field operations. This report is intended to provide the TEAM members with the information necessary for planning and conducting the Asian long-range tracer study. The experimental plan is proposed, at this time, to describe the efforts necessary to conduct the Asian long-range tracer study, and the plan will undoubtedly be revised and refined as the planning goes forward over the next year.

Allwine, K Jerry; Flaherty, Julia E.

2007-08-01T23:59:59.000Z

57

Advancing Reactive Tracer Methods for Measuring Thermal Evolution...  

Open Energy Info (EERE)

Advancing Reactive Tracer Methods for Measuring Thermal Evolution in CO2- and Water-Based Geothermal Reservoirs Geothermal Lab Call Project Jump to: navigation, search Last...

58

Using Thermally-Degrading, Partitioning, and Nonreactive Tracers...  

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

Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and FractureHeat Transfer Surface Area in Geothermal Reservoirs Using Thermally-Degrading,...

59

Integrated Approach to Use Natural Chemical and Isotopic Tracers...  

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

Integrated Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems Integrated Approach to Use Natural Chemical and...

60

Using Thermally-Degrading, Partitioning, and Nonreactive Tracers...  

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

Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and FractureHeat Transfer Surface Area in Geothermal Reservoirs Track Name May 19, 2010 This...

Note: This page contains sample records for the topic "tracer prep blanks" 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

Use of Tracers to Characterize Fractures in Engineered Geothermal...  

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

Fractures in Engineered Geothermal Systems Project Objectives: Measure interwell fracture surface area and fracture spacing using sorbing tracers; measure fracture surface...

62

Quantum Dot Tracers for Use in Engineered Geothermal  

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

tracers, colloidal quantum dots, that offer great promise for use in characterizing fracture networks in EGS reservoirs. Since the wavelength of fluorescence (color) of these...

63

Verification of Geothermal Tracer Methods in Highly Constrained...  

Open Energy Info (EERE)

tracers of varying rates of molecular diffusion. Exchange of heat energy between fracture and bulk rock (matrix) behaves in the same manner as the exchange of dissolved mass....

64

Tracer Methods for Characterizing Fracture Stimulation in Enhanced...  

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

80 4.6.7 Tracer Methods for Characterizing Fracture Stimulation in Enhanced Geothermal Systems (EGS) Presentation Number: 034 Investigator: Pruess, Karsten (Lawrence Berkeley...

65

Integrated Approach to Use Natural Chemical and Isotopic Tracers...  

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

Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems B. Mack Kennedy (Presenter) and H. H. Liu Lawrence Berkeley...

66

Tracer Methods for Characterizing Fracture Stimulation in Engineered...  

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

Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS) Karsten Pruess Lawrence Berkeley National Lab. May 19, 2010 This presentation does not...

67

The ATLAS DDM Tracer monitoring framework  

E-Print Network [OSTI]

The DDM Tracer Service is aimed to trace and monitor the atlas file operations on the Worldwide LHC Computing Grid. The volume of traces has increased significantly since the service started in 2009. Now there are about ~5 million trace messages every day and peaks of greater than 250Hz, with peak rates continuing to climb, which gives the current service structure a big challenge. Analysis of large datasets based on on-demand queries to the relational database management system (RDBMS), i.e. Oracle, can be problematic, and have a significant effect on the database's performance. Consequently, We have investigated some new high availability technologies like messaging infrastructure, specifically ActiveMQ, and key-value stores. The advantages of key value store technology are that they are distributed and have high scalability; also their write performances are usually much better than RDBMS, all of which are very useful for the Tracer service. Indexes and distributed counters have been also tested to improve...

ZANG, D; The ATLAS collaboration; BARISITS, M; LASSNIG, M; Andrew STEWART, G; MOLFETAS, A; BEERMANN, T

2012-01-01T23:59:59.000Z

68

90Sr liquid scintillation urine analysis utilizing different approaches for tracer recovery.  

SciTech Connect (OSTI)

90Sr is one of the isotopes most commonly produced by nuclear fission. This medium lived isotope presents serious challenges to radiation workers, the environment, and following a nuclear event, the general public. Methods of identifying this nuclide have been in existence for a number of years (e.g. Horwitz, E.P. [1], Maxwell, S.L.[2], EPA 905.0 [3]) which are time consuming, requiring a month or more for full analysis. This time frame is unacceptable in the present security environment. It is therefore important to have a dependable and rapid method for the determination of Sr. The purposes of this study are to reduce analysis time to less than half a day by utilizing a single method of radiation measurement while continuing to yield precise results. This paper presents findings on three methods that can meet this criteria; (1) stable Sr carrier, (2) 85Sr by gamma spectroscopy, and (3) 85Sr by LSC. Two methods of analyzing and calculating the 85Sr tracer recovery were investigated (gamma spectroscopy and a low energy window-Sr85LEBAB by LSC) as well as the use of two different types of Sr tracer (85Sr and stable Sr carrier). Three separate stock blank urine samples were spiked with various activity levels of 239Pu, 137Cs, 90Sr /90Y to determine the effectiveness of the Eichrome Sr-spec%C2%AE resin 2mL extractive columns. The objective was to compare the recoveries of 85Sr versus a stable strontium carrier, attempt to compare the rate at which samples can be processed by evaluating evaporation, neutralization, and removing the use of another instrument (gamma spectrometer) by using the LSC spectrometer to obtain 85Sr recovery. It was found that when using a calibration curve comprised of a different cocktail and a non-optimum discriminator setting reasonable results (bias of %C2%B1 25%) were achieved. The results from spiked samples containing 85Sr demonstrated that a higher recovery is obtained when using gamma spectroscopy (89-95%) than when using the LEB window from LSC (120-470%). The high recovery for 85Sr by LSC analysis may be due to the interference/cross talk from the alpha region since alpha counts were observed in all sample sets. After further investigation it was determined that the alpha counts were due to 239Pu breakthrough on the Sr-spec%C2%AE column. This requires further development to purify the Sr before an accurate tracer recovery determination can be made. Sample preparation times varied and ranged from 4-6 hours depending on the specific sample preparation process. The results from the spiked samples containing stable strontium nitrate Sr(NO3)2 carrier demonstrate that gravimetric analysis yields the most consistent high recoveries (97-101%) when evaporation is carefully performed. Since this method did not have a variation on the tracer recovery method, the samples were counted in 1) LEB/Alpha/Beta mode optimized for Sr-90, 2) DPM for Sr-90, and 3) general LEB/Alpha/Beta mode. The results (from the known) ranged from 79-104%, 107-177%, and 85-89% for 1, 2, and 3 respectively. Counting the prepared samples in a generic low energy beta/alpha/beta protocol yielded more accurate and consistent results and also yielded the shortest sample preparation turn-around-time of 3.5 hours.

Piraner, Olga [Centers for Disease Control and Prevention, Atlanta, GA; Preston, Rose T. [Sandia Staffing Alliance, LLC, Albuquerque, NM; Shanks, Sonoya Toyoko; Jones, Robert [Centers for Disease Control and Prevention, Atlanta, GA

2010-08-01T23:59:59.000Z

69

Use of Tracers to Characterize Fractures in Engineered Geothermal Systems  

Broader source: Energy.gov [DOE]

Project Objectives: Measure interwell fracture surface area and fracture spacing using sorbing tracers; measure fracture surface areas adjacent to a single geothermal well using tracers and injection/backflow techniques; design, fabricate and test a downhole instrument for measuring fracture flow following a hydraulic stimulation experiment.

70

Preliminary Investigation of Tracer Gas Reaeration Method for Shallow Bays  

E-Print Network [OSTI]

was used with propane for the tracer gas and Rhodamine-WT, a fluorescent dye, for the "conservative" tracer. The propane was injected through porous tile diffusers, and the dye was released simultaneously. The propane acts as a model for the surface...

Baker, Sarah H.; Holley, Edward R.

71

Parallel Finite Element Simulation of Tracer Injection in Oil Reservoirs  

E-Print Network [OSTI]

Parallel Finite Element Simulation of Tracer Injection in Oil Reservoirs Alvaro L.G.A. Coutinho In this work, parallel finite element techniques for the simulation of tracer injection in oil reservoirs. Supercomputers have made it possible to consider global reservoir effects which can not be represented using

Coutinho, Alvaro L. G. A.

72

MIPAS observations of organic tracers for biomass burning and intercontinental transport  

E-Print Network [OSTI]

MIPAS observations of organic tracers for biomass burning and intercontinental transport observations of organic tracers for biomass burning and intercontinental transport Introduction Suite - Oxford - September 2009 #12;MIPAS observations of organic tracers for biomass burning

73

Methods and systems using encapsulated tracers and chemicals for reservoir interrogation and manipulation  

DOE Patents [OSTI]

An apparatus, method, and system of reservoir interrogation. A tracer is encapsulating in a receptacle. The receptacle containing the tracer is injected into the reservoir. The tracer is analyzed for reservoir interrogation.

Roberts, Jeffery; Aines, Roger D; Duoss, Eric B; Spadaccini, Christopher M

2014-11-04T23:59:59.000Z

74

When do tracer particles dominate the Lyapunov spectrum?  

E-Print Network [OSTI]

Dynamical instability is studied in a deterministic dynamical system of Hamiltonian type composed of a tracer particle in a fluid of many particles. The tracer and fluid particles are hard balls (disks, in two dimensions, or spheres, in three dimensions) undergoing elastic collisions. The dynamical instability is characterized by the spectrum of Lyapunov exponents. The tracer particle is shown to dominate the Lyapunov spectrum in the neighborhoods of two limiting cases: the Lorentz-gas limit in which the tracer particle is much lighter than the fluid particles and the Rayleigh-flight limit in which the fluid particles have a vanishing radius and form an ideal gas. In both limits, a gap appears in the Lyapunov spectrum between the few largest Lyapunov exponents associated with the tracer and the rest of the Lyapunov spectrum.

Pierre Gaspard; Henk van Beijeren

2002-02-22T23:59:59.000Z

75

National Biomedical Tracer Facility. Project definition study  

SciTech Connect (OSTI)

We request a $25 million government-guaranteed, interest-free loan to be repaid over a 30-year period for construction and initial operations of a cyclotron-based National Biomedical Tracer Facility (NBTF) in North Central Texas. The NBTF will be co-located with a linear accelerator-based commercial radioisotope production facility, funded by the private sector at approximately $28 million. In addition, research radioisotope production by the NBTF will be coordinated through an association with an existing U.S. nuclear reactor center that will produce research and commercial radioisotopes through neutron reactions. The combined facilities will provide the full range of technology for radioisotope production and research: fast neutrons, thermal neutrons, and particle beams (H{sup -}, H{sup +}, and D{sup +}). The proposed NBTF facility includes an 80 MeV, 1 mA H{sup -} cyclotron that will produce proton-induced (neutron deficient) research isotopes.

Schafer, R.

1995-02-14T23:59:59.000Z

76

Introduction of the Development ofIntroduction of the Development of New PET TracersNew PET Tracers  

E-Print Network [OSTI]

Introduction of the Development ofIntroduction of the Development of New PET TracersNew PET Tracers The Center for Translational Neuroimaging KunKun--EekEek KilKil #12;Principles of PET-1 PET: Positron Emission Tomography #12;Principles of PET-2 Cyclotron Scanner #12;Principles of PET-3 0 0.01 0.02 0.03 0

77

Novel Multi-dimensional Tracers for Geothermal Inter-wall Diagnostics...  

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

Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and FractureHeat Transfer Surface Area in Geothermal Reservoirs Use of Tracers to Characterize...

78

The effects of composition, temperature and sample size on the sintering of chem-prep high field varistors.  

SciTech Connect (OSTI)

The sintering behavior of Sandia chem-prep high field varistor materials was studied using techniques including in situ shrinkage measurements, optical and scanning electron microscopy and x-ray diffraction. A thorough literature review of phase behavior, sintering and microstructure in Bi{sub 2}O{sub 3}-ZnO varistor systems is included. The effects of Bi{sub 2}O{sub 3} content (from 0.25 to 0.56 mol%) and of sodium doping level (0 to 600 ppm) on the isothermal densification kinetics was determined between 650 and 825 C. At {ge} 750 C samples with {ge}0.41 mol% Bi{sub 2}O{sub 3} have very similar densification kinetics, whereas samples with {le}0.33 mol% begin to densify only after a period of hours at low temperatures. The effect of the sodium content was greatest at {approx}700 C for standard 0.56 mol% Bi{sub 2}O{sub 3} and was greater in samples with 0.30 mol% Bi{sub 2}O{sub 3} than for those with 0.56 mol%. Sintering experiments on samples of differing size and shape found that densification decreases and mass loss increases with increasing surface area to volume ratio. However, these two effects have different causes: the enhancement in densification as samples increase in size appears to be caused by a low oxygen internal atmosphere that develops whereas the mass loss is due to the evaporation of bismuth oxide. In situ XRD experiments showed that the bismuth is initially present as an oxycarbonate that transforms to metastable {beta}-Bi{sub 2}O{sub 3} by 400 C. At {approx}650 C, coincident with the onset of densification, the cubic binary phase, Bi{sub 38}ZnO{sub 58} forms and remains stable to >800 C, indicating that a eutectic liquid does not form during normal varistor sintering ({approx}730 C). Finally, the formation and morphology of bismuth oxide phase regions that form on the varistors surfaces during slow cooling were studied.

Garino, Terry J.

2007-09-01T23:59:59.000Z

79

Primordial black holes as biased tracers  

E-Print Network [OSTI]

Primordial black holes (PBHs) are theoretical black holes which may be formed during the radiation dominant era and, basically, caused by the gravitational collapse of radiational overdensities. It has been well known that in the context of the structure formation in our Universe such collapsed objects, e.g., halos/galaxies, could be considered as bias tracers of underlying matter fluctuations and the halo/galaxy bias has been studied well. Employing a peak-background split picture which is known to be a useful tool to discuss the halo bias, we consider the large scale clustering behavior of the PBH and propose an almost mass-independent constraint to the scenario that dark matters (DMs) consist of PBHs. We consider the case where the statistics of the primordial curvature perturbations is almost Gaussian, but with small local-type non-Gaussianity. If PBHs account for the DM abundance, such a large scale clustering of PBHs behaves as nothing but the matter isocurvature perturbation and constrained strictly by...

Tada, Yuichiro

2015-01-01T23:59:59.000Z

80

Tracking thermal fronts with temperature-sensitive, chemically reactive tracers  

SciTech Connect (OSTI)

Los Alamos is developing tracer techniques using reactive chemicals to track thermal fronts in fractured geothermal reservoirs. If a nonadsorbing tracer flowing from the injection to production well chemically reacts, its reaction rate will be a strong function of temperature. Thus the extent of chemical reaction will be greatest early in the lifetime of the system, and less as the thermal front progresses from the injection to production well. Early laboratory experiments identified tracers with chemical kinetics suitable for reservoirs in the temperature range of 75 to 100/sup 0/C. Recent kinetics studies have focused on the kinetics of hydrolysis of derivatives of bromobenzene. This class of reactions can be used in reservoirs ranging in temperature from 150 to 275/sup 0/C, which is of greater interest to the geothermal industry. Future studies will include laboratory adsorption experiments to identify possibly unwanted adsorption on granite, development of sensitive analytical techniques, and a field demonstration of the reactive tracer concept.

Robinson, B.A.; Birdsell, S.A.

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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.


81

Mass spectral characterization of petroleum dyes, tracers, and additives  

SciTech Connect (OSTI)

Petroleum dyes, additives, and tracers are important for identifying gasolines in spill and contamination problems. High-resolution mass spectrometry (HRMS) was used for the characterization of 21 commercial petroleum dyes. Many contained common chromophores, typically azo or anthraquinone groups, and often differed only in their degree of alkyl substitution. Few dyes were pure and typically contained several chromogens with homologous series of substituents. A separation method was developed to concentrate the polar fractions containing the additives. Subsequent characterization of the polar fraction by GC/MS showed distinct differences between different gasolines. Various colorless tracers were evaluated in terms of detectability, soil adsorption, and cost. Many tracers exhibited soil adsorption and interferences which limited their detectability. Alcohols in the C8-C10 range were found to be the most suitable tracers with GC/MS detection limits of 1 ppm. 22 references, 4 figures, 3 tables.

Youngless, T.L.; Swansiger, J.T.; Danner, D.A.; Greco, M.

1985-08-01T23:59:59.000Z

82

Inverse modeling of partitioning interwell tracer tests: A streamline approach  

E-Print Network [OSTI]

computations, inverse modeling 1. Introduction [2] It is recognized that the presence of nonaqueous phaseInverse modeling of partitioning interwell tracer tests: A streamline approach Akhil Datta orders of magnitude. INDEX TERMS: 1832 Hydrology: Groundwater transport; 1829 Hydrology: Groundwater

Datta-Gupta, Akhil

83

11/23/11 10:55 AMQualtrics Survey Software Page 1 of 11https://dc-viawest.qualtrics.com/WRQualtricsControlPanel/PopUp.php?PopType=SurveyPrintPreview&WID=_blank  

E-Print Network [OSTI]

ControlPanel/PopUp.php?PopType=SurveyPrintPreview&WID=_blank Male Female African American/ Black American-viawest.qualtrics.com/WRQualtricsControlPanel/PopUp.php?PopType=SurveyPrintPreview&WID=_blank WRE - MARCHhttps://dc-viawest.qualtrics.com/WRQualtricsControlPanel/PopUp.php

de Lijser, Peter

84

HYDROGEL TRACER BEADS: THE DEVELOPMENT, MODIFICATION, AND TESTING OF AN INNOVATIVE TRACER FOR BETTER UNDERSTANDING LNAPL TRANSPORT IN KARST AQUIFERS  

SciTech Connect (OSTI)

The goal of this specific research task is to develop proxy tracers that mimic contaminant movement to better understand and predict contaminant fate and transport in karst aquifers. Hydrogel tracer beads are transported as a separate phase than water and can used as a proxy tracer to mimic the transport of non-aqueous phase liquids (NAPL). They can be constructed with different densities, sizes & chemical attributes. This poster describes the creation and optimization of the beads and the field testing of buoyant beads, including sampling, tracer analysis, and quantitative analysis. The buoyant beads are transported ahead of the dissolved solutes, suggesting that light NAPL (LNAPL) transport in karst may occur faster than predicted from traditional tracing techniques. The hydrogel beads were successful in illustrating this enhanced transport.

Amanda Laskoskie, Harry M. Edenborn, and Dorothy J. Vesper

2012-01-01T23:59:59.000Z

85

Effects of Post-Weld Heat Treatment on the Mechanical Properties of Similar- and Dissimilar-Alloy Friction Stir Welded Blanks  

SciTech Connect (OSTI)

Friction stir welding is a solid state joining process with relatively low welding temperatures. Nevertheless, the mechanical properties of friction stir welded blanks are degraded after welding. Indeed, both strength and ductility of the welds are decreased after welding. Often, the resulting friction stir welded blanks need to be formed to their final structural shape. Therefore, the formability of friction stir welded blanks is of primary importance in the manufacturing of structural parts. This paper studies how the mechanical properties and particularly formability of friction stir welded blanks can be improved by applying a post weld heat treatment. Two aluminum alloys from 2000 and 7000 series, namely 2024-T3 and 7075-T6, are selected for the study. The sheet thickness of both materials is 2,0 mm. The selected alloys are welded in three configurations: 2024-T3 and 2024-T3, 7075-T6 and 7075-T6, and 2024-T3 and 7075-T6. The resulting welds are naturally aged for a few months. Three sets of standard dog bone shape tensile test specimens are then machined from the welds. The first set of the specimens is tested without any heat treatment. The second set of the specimens is solution heat treated and quenched before testing. The third set of the specimens is solution heat treated, quenched, and naturally aged for a week before testing. The mechanical properties of the three different sets of specimens are compared with each other. It is shown that careful selection of post weld heat-treatment can greatly improve the formability of friction stir welded blanks.

Zadpoor, Amir Abbas [Materials Innovation Institute (M2i), Mekelweg 2, Delft 2628CD (Netherlands); Faculty of Aerospace Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2629HS (Netherlands); Sinke, Jos [Faculty of Aerospace Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2629HS (Netherlands)

2011-01-17T23:59:59.000Z

86

Spectral analysis for evaluation of myocardial tracers for medical imaging  

SciTech Connect (OSTI)

Kinetic analysis of dynamic tracer data is performed with the goal of evaluating myocardial radiotracers for cardiac nuclear medicine imaging. Data from experiments utilizing the isolated rabbit heart model are acquired by sampling the venous blood after introduction of a tracer of interest and a reference tracer. We have taken the approach that the kinetics are properly characterized by an impulse response function which describes the difference between the reference molecule (which does not leave the vasculature) and the molecule of interest which is transported across the capillary boundary and is made available to the cell. Using this formalism we can model the appearance of the tracer of interest in the venous output of the heart as a convolution of the appearance of the reference tracer with the impulse response. In this work we parameterize the impulse response function as the sum of a large number of exponential functions whose predetermined decay constants form a spectrum, and each is required only to have a nonnegative coefficient. This approach, called spectral analysis, has the advantage that it allows conventional compartmental analysis without prior knowledge of the number of compartments which the physiology may require or which the data will support.

Huesman, Ronald H.; Reutter, Bryan W.; Marshall, Robert C.

2000-10-11T23:59:59.000Z

87

Preliminary assessment of halogenated alkanes as vapor-phase tracers  

SciTech Connect (OSTI)

New tracers are needed to evaluate the efficiency of injection strategies in vapor-dominated environments. One group of compounds that seems to meet the requirements for vapor-phase tracing are the halogenated alkanes (HCFCs). HCFCs are generally nontoxic, and extrapolation of tabulated thermodynamic data indicate that they will be thermally stable and nonreactive in a geothermal environment. The solubilities and stabilities of these compounds, which form several homologous series, vary according to the substituent ratios of fluorine, chlorine, and hydrogen. Laboratory and field tests that will further define the suitability of HCFCs as vapor-phase tracers are under way.

Adams, Michael C.; Moore, Joseph N.; Hirtz, Paul

1991-01-01T23:59:59.000Z

88

PMRS Certification Form Revised 6/2/14 Complete each blank in the form with the company name. For questions regarding CSI Performance  

E-Print Network [OSTI]

PMRS Certification Form ­ Revised 6/2/14 Complete each blank in the form with the company name-800-743-5000 or solar@pge.com. PG&E will share your question with the other Program Administrators. Company Name: Phone for the electronic delivery of reports. 5.3.3 Time Granularity of Acquired Data The PMRS must log all Required Solar

89

Candidate isolated neutron stars and other optically blank x-ray fields identified from the rosat all-sky and sloan digital sky surveys  

SciTech Connect (OSTI)

Only seven radio-quiet isolated neutron stars (INSs) emitting thermal X rays are known, a sample that has yet to definitively address such fundamental issues as the equation of state of degenerate neutron matter. We describe a selection algorithm based on a cross-correlation of the ROSAT All-Sky Survey (RASS) and the Sloan Digital Sky Survey (SDSS) that identifies X-ray error circles devoid of plausible optical counterparts to the SDSS g {approx} 22 magnitudes limit. We quantitatively characterize these error circles as optically blank; they may host INSs or other similarly exotic X-ray sources such as radio-quiet BL Lacs, obscured AGN, etc. Our search is an order of magnitude more selective than previous searches for optically blank RASS error circles, and excludes the 99.9% of error circles that contain more common X-ray-emitting subclasses. We find 11 candidates, nine of which are new. While our search is designed to find the best INS candidates and not to produce a complete list of INSs in the RASS, it is reassuring that our number of candidates is consistent with predictions from INS population models. Further X-ray observations will obtain pinpoint positions and determine whether these sources are entirely optically blank at g {approx} 22, supporting the presence of likely isolated neutron stars and perhaps enabling detailed follow-up studies of neutron star physics.

Agueros, Marcel A.; Anderson, Scott F.; /Washington U., Seattle, Astron. Dept.; Margon, Bruce; /Baltimore, Space Telescope Sci.; Haberl, Frank; Voges, Wolfgang; /Garching,; Annis, James; /Fermilab; Schneider, Donald P.; /Penn State U., Astron. Astrophys.; Brinkmann, Jonathan; /Apache Point Observ.

2005-11-01T23:59:59.000Z

90

36Cl as a tracer in geothermal systems- Example from Valles Caldera...  

Open Energy Info (EERE)

Cl as a tracer in geothermal systems- Example from Valles Caldera, New Mexico Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: 36Cl as a tracer...

91

Time-scales of passive tracers in the ocean with paleoapplications  

E-Print Network [OSTI]

Quantifying time-responses of the ocean to passive and active tracers is critical when interpreting paleodata from sediment cores. Surface-injected tracers are not spreading instantaneously or uniformly throughout the ...

Siberlin, Charlotte

2010-01-01T23:59:59.000Z

92

RADIOGENIC ISOTOPES: TRACERS OF PAST OCEAN CIRCULATION AND EROSIONAL INPUT  

E-Print Network [OSTI]

in the ocean has varied as a function of changes in paleocircu- lation, source provenances, style and intensity-established paleoceano- graphic tracers such as carbon isotopes. INDEX TERMS: 1040 Geochemistry: Isotopic composition Atlantic Deep Water (NADW) according to latest estimates based on results of the World Ocean Circulation

Jellinek, Mark

93

DIVISION S-3-NOTES HYDROLOGIC TRACER EFFECTS ON SOIL  

E-Print Network [OSTI]

and denitrification (the conversion of NOf to N gas)can be important to the fate of NOf and organic pollutants on microbial activity. These effects could be important whentracers areused instudies of the fate and transport of pollutants in the environment. In such studies, it is important to determine if tracer compounds affect

Gold, Art

94

Diagnostic Implications of the Reactivity of Fluorescence Tracers  

SciTech Connect (OSTI)

Measurements of fuel concentration distributions with planar laser induced fluorescence of tracer molecules that are added to a base fuel are commonly used in combustion research and development. It usually is assumed that the tracer concentration follows the parent fuel concentration if physical properties such as those determining evaporation are matched. As an example to address this general issue a computational study of combustion of biacetyl/iso-octane mixtures was performed to investigate how well the concentration of biacetyl represents the concentration of iso-octane. For premixed mixture conditions with flame propagation the spatial concentration profiles of the two species in the flame front are separated by 110 {micro}m at 1 bar and by 11 {micro}m at 10 bar. For practical applications this spatial separation is insignificantly small. However, for conditions that mimic ignition and combustion in diesel and HCCI-like operation the differences in tracer and fuel concentration can be significant, exceeding hundreds of percent. At low initial temperature biacetyl was found to be more stable whereas at higher temperature (>1000K) iso-octane is more stable. Similar findings were obtained for a multi-component fuel comprised of iso-octane, n-heptane, methylcyclohexane, and toluene. It may be assumed that similar differences can exist for other tracer/fuel combinations. Caution has therefore to be applied when interpreting PLIF measurements in homogeneous reaction conditions such as in HCCI engine studies.

Sick, V; Westbrook, C

2008-07-14T23:59:59.000Z

95

The feasibility of ethyl iodide as an atmospheric tracer  

E-Print Network [OSTI]

. The CCl? was dissolved in toluene and measured with an electron-capture detector. The differences between the two tracers appeared in the lateral distribution measurements where the CC1, showed higher values than the HTO. The HTO results were described...

Everett, Joe Vincent

1976-01-01T23:59:59.000Z

96

ANALYSIS OF TRACER AND THERMAL TRANSIENTS DURING REINJECTION  

E-Print Network [OSTI]

and developed a new technique which combines the results from in- terwell tracer tests and thermal injection variables of the injection and backflow periods. Finally we suggested thermal injection-backflow tests for interpreting thermal injection-backflow tests. In fact, the MD model was first developed by Lauwerier to study

Stanford University

97

Diss. ETH Nr. 10714 Helium und Tritium als Tracer fr  

E-Print Network [OSTI]

Diss. ETH Nr. 10714 Helium und Tritium als Tracer für physikalische Prozesse in Seen ABHANDLUNG zur Zürich 1994 #12;Kurzfassung ix Kurzfassung Der radioaktive Zerfall von 3H (Tritium) zu 3He mit einer Fluide aus dem Erdinnern. Helium und Tritium werden massenspektrometrisch analysiert. Im Rahmen dieser Ar

Aeschbach-Hertig, Werner

98

Calibration of hydraulic and tracer tests in fractured media  

E-Print Network [OSTI]

Calibration of hydraulic and tracer tests in fractured media represented by a DFN Model L. D. Donado, X. Sanchez-Vila, E. Ruiz* & F. J. Elorza** * Enviros Spain S.L. ** UPM #12;Fractured Media Water flows through fractures (matrix basically impervious ­ though relevant to transport) Fractures at all

Politècnica de Catalunya, Universitat

99

DYES AS TRACERS FOR VADOSE ZONE HYDROLOGY Markus Flury and Nu Nu Wai  

E-Print Network [OSTI]

DYES AS TRACERS FOR VADOSE ZONE HYDROLOGY Markus Flury and Nu Nu Wai Department of Crop and Soil tracers have provided clues about the hydrological cycle as well as flow and transport processes information on dyes used as hydrological tracers, with particular emphasis on vadose zone hydrol- ogy. We

Flury, Markus

100

Page intentionally blank. ACKNOWLEDGMENTS  

E-Print Network [OSTI]

Water Resources Association, New York Power Authority, Ontario Power Generation, Pacific Gas Generation, U.S. Society on Dams, and Xcel Energy. The GCC is composed of the following government security project. iv #12;EXECUTIVE SUMMARY The Dams Sector Consequence-Based Top Screen (CTS) was developed

Kemner, Ken

Note: This page contains sample records for the topic "tracer prep blanks" 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

Blank Starting Slide  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScienceCareers Apply forBiosurveillance A Los AlamosClean

102

Quantitative interpretation of tracer test data | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: EnergyPotentialUrbanUtilityScalePVCapacityPulaski County, Kentucky:County, Georgia: Energy79.tracer test data

103

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, What is the skill of ocean tracers in reducing uncertainties  

E-Print Network [OSTI]

in current Earth system models and (ii) imperfect knowledge of model parameters. Ocean tracers observa- tions

Haran, Murali

104

Development of Models to Simulate Tracer Tests for Characterization of Enhanced Geothermal Systems  

SciTech Connect (OSTI)

A recent report found that power and heat produced from enhanced (or engineered) geothermal systems (EGSs) could have a major impact on the U.S energy production capability while having a minimal impact on the environment. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distribution, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for the design and commercial development of the geothermal energy of a potential EGS site. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. This project was initially focused on tracer development with the application of perfluorinated tracer (PFT) compounds, non-reactive tracers used in numerous applications from atmospheric transport to underground leak detection, to geothermal systems, and evaluation of encapsulated PFTs that would release tracers at targeted reservoir temperatures. After the 2011 midyear review and subsequent discussions with the U.S. Department of Energy Geothermal Technology Program (GTP), emphasis was shifted to interpretive tool development, testing, and validation. Subsurface modeling capabilities are an important component of this project for both the design of suitable tracers and the interpretation of data from in situ tracer tests, be they single- or multi-well tests. The purpose of this report is to describe the results of the tracer and model development for simulating and conducting tracer tests for characterizing EGS parameters.

Williams, Mark D.; Reimus, Paul; Vermeul, Vincent R.; Rose, Peter; Dean, Cynthia A.; Watson, Tom B.; Newell, D.; Leecaster, Kevin; Brauser, Eric

2013-05-01T23:59:59.000Z

105

COMPARISON OF THREE TRACER TESTS AT THE RAFT RIVER GEOTHERMAL SITE  

SciTech Connect (OSTI)

Three conservative tracer tests have been conducted through the Bridge Fault fracture zone at the Raft River Geothermal (RRG) site. All three tests were conducted between injection well RRG-5 and production wells RRG-1 (790 m distance) and RRG-4 (740 m distance). The injection well is used during the summer months to provide pressure support to the production wells. The first test was conducted in 2008 using 136 kg of fluorescein tracer. Two additional tracers were injected in 2010. The first 2010 tracer injected was 100 kg fluorescein disodium hydrate salt on June, 21. The second tracer (100 kg 2,6-naphthalene disulfonic acid sodium salt) was injected one month later on July 21. Sampling of the two productions wells is still being performed to obtain the tail end of the second 2010 tracer test. Tracer concentrations were measured using HPLC with a fluorescence detector. Results for the 2008 test, suggest 80% tracer recover at the two production wells. Of the tracer recovered, 85% of tracer mass was recovered in well RRG-4 indicating a greater flow pathway connection between injection well and RRG-4 than RRG-1. Fluorescein tracer results appear to be similar between the 2008 and 2010 tests for well RRG-4 with peak concentrations arriving approximately 20 days after injection despite the differences between the injection rates for the two tests (~950 gpm to 475 gpm) between the 2008 and 2010. The two 2010 tracer tests will be compared to determine if the results support the hypothesis that rock contraction along the flow pathway due to the 55 oC cooler water injection alters the flow through the ~140 oC reservoir.

Earl D Mattson; Mitchell Plummer; Carl Palmer; Larry Hull; Samantha Miller; Randy Nye

2011-02-01T23:59:59.000Z

106

Use of tracers in materials-holdup study  

SciTech Connect (OSTI)

Holdup measurements of special nuclear materials in large processing facilities offer considerable challenges to conventional nondestructive-assay techniques. The use of judiciously chosen radioactive tracers offer a unique method of overcoming this difficulty. Three examples involving the use of /sup 46/Sc and fission products from activated uranium in large-scale experimental studies of uranium holdup are discussed. A justification for the method and its advantages along with examples of successful applications of this technique for large-sale experimental studies are presented.

Pillay, K.K.S.

1983-01-01T23:59:59.000Z

107

Determination of water saturation using gas phase partitioning tracers and  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesData FilesShape, Density,TiO2(110). |Gas-phase Tracer

108

Sandia National Laboratories: tracer studies integrated with geophysical  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbineredox-activeNational SolartSSLPV materialsmethods tracer

109

Determination of Water Saturation in Relatively Dry Porous Media Using Gas-phase Tracer Tests  

SciTech Connect (OSTI)

Soil desiccation (drying), involving water evaporation induced by dry air injection and extraction, is a potentially robust remediation process to slow migration of inorganic or radionuclide contaminants through the vadose zone. The application of gas-phase partitioning tracer tests has been proposed as a means to estimate initial water volumes and to monitor the progress of the desiccation process at pilot-test and field sites. In this paper, tracer tests have been conducted in porous medium columns with various water saturations using sulfur hexafluoride as the conservative tracer and tricholorofluoromethane and difluoromethane as the water-partitioning tracers. For porous media with minimal silt and/or organic matter fractions, tracer tests provided reasonable saturation estimates for saturations close to zero. However, for sediments with significant silt and/or organic matter fractions, tracer tests only provided satisfactory results when the water saturation was at least 0.1 - 0.2. For dryer conditions, the apparent tracer retardation increases due to air – soil sorption, which is not included in traditional retardation coefficients derived from advection-dispersion equations accounting only for air – water partitioning and water – soil sorption. Based on these results, gas-phase partitioning tracer tests may be used to determine initial water volumes in sediments, provided the initial water saturations are sufficiently large. However, tracer tests are not suitable for quantifying moisture content in desiccated sediments.

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

2011-04-15T23:59:59.000Z

110

Calcium translocation and whole plant transpiration: spatial and temporal measurements using radio-Strontium as tracer  

E-Print Network [OSTI]

comparison with zinc, strontium and rubidium. Annals of783- Wasserman RH. 1998. Strontium as a tracer for calciumor inapplicable. As Strontium (Sr) was found to behave in

Seligmann, Ron; Wengrowicz, Udi; Tirosh, Danny; Yermiyahu, Uri; Bar-Tal, Asher; Schwartz, Amnon

2009-01-01T23:59:59.000Z

111

AN INTEGRATED APPROACH TO CHARACTERIZING BYPASSED OIL IN HETEROGENEOUS AND FRACTURED RESERVOIRS USING PARTITIONING TRACERS  

SciTech Connect (OSTI)

We explore the use of efficient streamline-based simulation approaches for modeling partitioning interwell tracer tests in hydrocarbon reservoirs. Specifically, we utilize the unique features of streamline models to develop an efficient approach for interpretation and history matching of field tracer response. A critical aspect here is the underdetermined and highly ill-posed nature of the associated inverse problems. We have adopted an integrated approach whereby we combine data from multiple sources to minimize the uncertainty and non-uniqueness in the interpreted results. For partitioning interwell tracer tests, these are primarily the distribution of reservoir permeability and oil saturation distribution. A novel approach to multiscale data integration using Markov Random Fields (MRF) has been developed to integrate static data sources from the reservoir such as core, well log and 3-D seismic data. We have also explored the use of a finite difference reservoir simulator, UTCHEM, for field-scale design and optimization of partitioning interwell tracer tests. The finite-difference model allows us to include detailed physics associated with reactive tracer transport, particularly those related with transverse and cross-streamline mechanisms. We have investigated the potential use of downhole tracer samplers and also the use of natural tracers for the design of partitioning tracer tests. Finally, the behavior of partitioning tracer tests in fractured reservoirs is investigated using a dual-porosity finite-difference model.

Akhil Datta-Gupta

2003-08-01T23:59:59.000Z

112

Novel Multi-dimensional Tracers for Geothermal Inter-wall Diagnostics  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Presentation. The objective of this project is to develop a matrix of the smart geothermal tracer and its interpretation tools.

113

E-Print Network 3.0 - activity optimal tracers Sample Search...  

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

AND AMOC Abstract Current projections of the oceanic response... in current Earth system models and (ii) imperfect knowledge of model parameters. Ocean tracers observa- tions...

114

Steam tracer experiment at the Hoe Creek No. 3 underground coal gasification field test  

SciTech Connect (OSTI)

Water plays an important role in in-situ coal gasification. To better understand this role, we conducted a steam tracer test during the later stages of the Hoe Creek No. 3 underground coal gasification field test. Deuterium oxide was used as the tracer. This report describes the tracer test and the analysis of the data obtained. The analysis indicates that at Hoe Creek the injected steam interacts with a large volume of water as it passes through the underground system. We hypothesize that this water is undergoing continual reflux in the underground system, resulting in a tracer response typical of a well-stirred tank.

Thorsness, C.B.

1980-11-26T23:59:59.000Z

115

Estimation of tracer diffusion coefficients of ions in aqueous solution  

SciTech Connect (OSTI)

Equations are given for estimating tracer diffusion coefficients D/sub i//sup 0/ of ions at infinite dilution in terms of limiting ionic conductances ..lambda../sub i//sup 0/. Also given are generalized Nernst-Hartley equations for binary and multicomponent diffusion coefficients D/sup 0/ and D/sub ij//sup 0/, respectively, at infinite dilution. Data, estimates, and correlations for ..lambda../sub i//sup 0/ at 25/sup 0/C and other temperatures are discussed. Estimated values of ..lambda../sub i//sup 0/ are tabulated from 0-300/sup 0/C for ions of waste isolation interest and for ions of economic interest in geothermal brines. Estimates of their tracer diffusion coefficients at infinite dilution are tabulated. A rule of thumb, good to a factor of 2, is presented. Very limited data (available only at 25/sup 0/C) indicate that D/sub i//D/sub i//sup 0/ generally declines as the concentration of salt or supporting electrolyte increases. 6 figures, 2 tables.

Miller, D.G.

1982-09-07T23:59:59.000Z

116

Identification and characterization of conservative organic tracers for use as hydrologic tracers for the Yucca Mountain Site Characterization Study; Progress report, January 1, 1991--June 30, 1991  

SciTech Connect (OSTI)

Studies continue on the use of organic acids as tracers in hydrology studies of Yucca Mountain. Work performed during this time period has been concentrated in three main areas: the familiarization with, and optimization of, the LC-MS hardware and data system; the initial development of soil column test procedures, which are used for evaluation of both the columns themselves and the tracer compounds; and continuation of the batch sorption and degradation studies for the potential tracers. All three of these tasks will continue, as the addition of new tracer compounds, analytical information, and equipment will necessitate further evaluation of existing methods and procedures. Also included in this report is the final report on an information system.

Stetzenbach, K.J.

1991-12-31T23:59:59.000Z

117

Numerical study of the diapycnal flow through a tidal front with passive tracers  

E-Print Network [OSTI]

. This qualitatively agrees with a recent field experiment using a dye tracer on Georges Bank. Additional experiments are performed to investigate the sensitivity of the tracer dispersion to the tidal phase and the location, the previous studies indicated Eulerian cross-front mean circu- lation maybe is in a multiple-cell structure

Dong, Changming "Charles"

118

SOURCES AND EFFECTS OF MINING-RELATED AND NATURAL ACID ROCK DRAINAGE QUANTIFIED USING TRACER  

E-Print Network [OSTI]

SOURCES AND EFFECTS OF MINING-RELATED AND NATURAL ACID ROCK DRAINAGE QUANTIFIED USING TRACER, and Architectural Engineering 2006 #12;ii This thesis entitled: Sources and Effects of Mining-Related and Natural Acid Rock Drainage Quantified Using Tracer Dilution, Coal Creek Watershed, Gunnison County, Colorado

Ryan, Joe

119

A dye tracer reveals cross-shelf dispersion and interleaving on the Oregon shelf  

E-Print Network [OSTI]

A dye tracer reveals cross-shelf dispersion and interleaving on the Oregon shelf A. C. Dale,1 M. D December 2005; published 3 February 2006. [1] A fluorescent dye tracer was injected into the pycnocline the other in the water column, split by interleaving dye-free water. The vertical scale of these layers

Kurapov, Alexander

120

Verification of flow processes in soils with combined sprinkling and dye tracer experiments  

E-Print Network [OSTI]

1 Verification of flow processes in soils with combined sprinkling and dye tracer experiments with sprinkling experiments and dye tracing under different rainfall intensities and soil moisture conditions. The dye tracer was continuously applied with the sprinkling water on 1 m2 plots. After the sprinkling

Weiler, Markus

Note: This page contains sample records for the topic "tracer prep blanks" 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

Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period  

E-Print Network [OSTI]

Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period R (2006), Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period histories from ice coring of Greenland and Antarctica over the period 2 to 45 ka, using SO4 anomalies

Price, P. Buford

122

First Tracer Test After Circulation in Desert Peak 27-15  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Following the successful stimulation of Desert Peak target EGS well 27-15, a circulation test was initiated by injecting a conservative tracer (1,5-nds) in combination with a reactive tracer (7-amino-1,3-naphthalene disulfonate). The closest production well 74-21 was monitored over the subsequent several months.

Rose, Peter

123

First Tracer Test After Circulation in Desert Peak 27-15  

SciTech Connect (OSTI)

Following the successful stimulation of Desert Peak target EGS well 27-15, a circulation test was initiated by injecting a conservative tracer (1,5-nds) in combination with a reactive tracer (7-amino-1,3-naphthalene disulfonate). The closest production well 74-21 was monitored over the subsequent several months.

Rose, Peter

2013-11-16T23:59:59.000Z

124

Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS)  

Broader source: Energy.gov [DOE]

Project objectives: identify tracers with sorption properties favorable for EGS applications; apply reversibly sorbing tracers to determine the fracture-matrix interface area available for heat transfer; and; explore the feasibility of obtaining fracture-matrix interface area from non-isothermal; single-well injection-withdrawal (SWIW) tests.

125

Slew-rate dependence of tracer magnetization response in magnetic particle imaging  

SciTech Connect (OSTI)

Magnetic Particle Imaging (MPI) is a new biomedical imaging technique that produces real-time, high-resolution tomographic images of superparamagnetic iron oxide nanoparticle tracers. Currently, 25?kHz and 20?mT/?{sub 0} excitation fields are common in MPI, but lower field amplitudes may be necessary for patient safety in future designs. Here, we address fundamental questions about MPI tracer magnetization dynamics and predict tracer performance in future scanners that employ new combinations of excitation field amplitude (H{sub o}) and frequency (?). Using an optimized, monodisperse MPI tracer, we studied how several combinations of drive field frequencies and amplitudes affect the tracer's response, using Magnetic Particle Spectrometry and AC hysteresis, for drive field conditions at 15.5, 26, and 40.2?kHz, with field amplitudes ranging from 7 to 52?mT/?{sub 0}. For both fluid and immobilized nanoparticle samples, we determined that magnetic response was dominated by Néel reversal. Furthermore, we observed that the peak slew-rate (?H{sub o}) determined the tracer magnetic response. Smaller amplitudes provided correspondingly smaller field of view, sometimes resulting in excitation of minor hysteresis loops. Changing the drive field conditions but keeping the peak slew-rate constant kept the tracer response almost the same. Higher peak slew-rates led to reduced maximum signal intensity and greater coercivity in the tracer response. Our experimental results were in reasonable agreement with Stoner-Wohlfarth model based theories.

Shah, Saqlain A.; Krishnan, K. M., E-mail: kannanmk@uw.edu [Materials Science and Engineering, University of Washington, Seattle, Washington 98195 (United States); Ferguson, R. M. [LodeSpin Labs, P.O. Box 95632, Seattle, Washington 98145 (United States)

2014-10-28T23:59:59.000Z

126

Heat as a tracer to determine streambed water exchanges Jim Constantz1  

E-Print Network [OSTI]

Heat as a tracer to determine streambed water exchanges Jim Constantz1 Received 13 March 2008 of heat as a tracer of shallow groundwater movement and describes current temperature-based approaches relying on traditional observation wells, and remote sensing and other large-scale advanced temperature

127

SAND TRACER MOVEMENT MEASURED IN A STRONG RIP CURRENT Nicholas C. Kraus  

E-Print Network [OSTI]

exceeding 50 cm/sec in areas where instruments could be placed. Three colors of sand tracer were injected the diver's signal, a float tied to the diver's wrist was released and allowed to flow with the current because of the cold water, placed instruments, injected the tracer, and sampled the bottom with ropes tied

US Army Corps of Engineers

128

Curvature Induced Activation of a Passive Tracer in an Active Bath  

E-Print Network [OSTI]

We use numerical simulations to study the motion of a large asymmetric tracer immersed in a low density suspension of self-propelled nanoparticles in two dimensions. Specifically, we analyze how the curvature of the tracer affects its translational and rotational motion in an active environment. We find that even very small amounts of curvature are sufficient for the active bath to impart directed motion to the tracer which results in its effective activation. We propose simple scaling arguments to characterize this induced activity in terms of the curvature of the tracer and the strength of the self-propelling force. Our results suggest new ways of controlling the transport properties of passive tracers in an active medium by carefully tailoring their geometry.

S. A. Mallory; C. Valeriani; A. Cacciuto

2014-09-25T23:59:59.000Z

129

L\\'evy Fluctuations and Tracer Diffusion in Dilute Suspensions of Algae and Bacteria  

E-Print Network [OSTI]

Swimming microorganisms rely on effective mixing strategies to achieve efficient nutrient influx. Recent experiments, probing the mixing capability of unicellular biflagellates, revealed that passive tracer particles exhibit anomalous non-Gaussian diffusion when immersed in a dilute suspension of self-motile Chlamydomonas reinhardtii algae. Qualitatively, this observation can be explained by the fact that the algae induce a fluid flow that may occasionally accelerate the colloidal tracers to relatively large velocities. A satisfactory quantitative theory of enhanced mixing in dilute active suspensions, however, is lacking at present. In particular, it is unclear how non-Gaussian signatures in the tracers' position distribution are linked to the self-propulsion mechanism of a microorganism. Here, we develop a systematic theoretical description of anomalous tracer diffusion in active suspensions, based on a simplified tracer-swimmer interaction model that captures the typical distance scaling of a microswimmer'...

Zaid, Irwin M; Yeomans, Julia M

2010-01-01T23:59:59.000Z

130

Mon. Not. R. Astron. Soc. 427, 679687 (2012) doi:10.1111/j.1365-2966.2012.21883.x Deep blank-field catalogue for medium-and large-sized telescopes  

E-Print Network [OSTI]

Mon. Not. R. Astron. Soc. 427, 679­687 (2012) doi:10.1111/j.1365-2966.2012.21883.x Deep blankInstituto de Astrof´isica de Canarias, E-38205 La Laguna, Tenerife, Spain 5GTC Project, E-38205 La Laguna that are devoid of stars down to a given threshold magnitude, constitutes one of the most relevant calibration

131

Using Biofuel Tracers to Study Alternative Combustion Regimes  

SciTech Connect (OSTI)

Interest in the use of alternative fuels and combustion regimes is increasing as the price of petroleum climbs. The inherently higher efficiency of Diesel engines has led to increased adoption of Diesels in Europe, capturing approximately 40% of the new passenger car market. Unfortunately, lower CO{sub 2} emissions are countered with higher nitrogen oxides (NOx) and particulate matter (PM) emissions, and higher noise. Noise and PM have traditionally been the obstacles toward consumer acceptance of Diesel passenger cars in North America, while NOx (a key component in photochemical smog) has been more of an engineering challenge. Diesels are lean burning (combustion with excess oxygen) and reducing NOx to N2 in an oxygen rich environment is difficult. Adding oxygenated compounds to the fuel helps reduce PM emissions, but relying on fuel alone to reduce PM is unrealistic. Keeping peak combustion temperature below 1700 K prevents NOx formation. Altering the combustion regime to burn at temperatures below the NOx threshold and accept a wide variety of fuels seems like a promising alternative for future engines. Homogeneous Charge Compression Ignition (HCCI) is a possible solution. Fuel and air are well mixed prior to intake into a cylinder (homogeneous charge) and ignition occurs by compression of the fuel-air mixture by the piston. HCCI is rapid and relatively cool, producing little NOx and PM. Unfortunately, it is hard to control since HCCI is initiated by temperature and pressure instead of a spark or direct fuel injection. We investigate biofuel HCCI combustion, and use intrinsically labeled biofuels as tracers of HCCI combustion. Data from tracer experiments are used to validate combustion modeling.

Mack, J H; Flowers, D L; Buchholz, B A; Dibble, R W

2006-02-14T23:59:59.000Z

132

Innovative techniques for the description of reservoir heterogeneity using tracers. Second technical annual progress report, October 1991--September 1992  

SciTech Connect (OSTI)

This second annual report on innovative uses of tracers for reservoir characterization contains four sections each describing a novel use of oilfield tracers. The first section describes and illustrates the use of a new single-well tracer test to estimate wettability. This test consists of the injection of brine containing tracers followed by oil containing tracers, a shut-in period to allow some of the tracers to react, and then production of the tracers. The inclusion of the oil injection slug with tracers is unique to this test, and this is what makes the test work. We adapted our chemical simulator, UTCHEM, to enable us to study this tracer method and made an extensive simulation study to evaluate the effects of wettability based upon characteristic curves for relative permeability and capillary pressure for differing wetting states typical of oil reservoirs. The second section of this report describes a new method for analyzing interwell tracer data based upon a type-curve approach. Theoretical frequency response functions were used to build type curves of ``transfer function`` and ``phase spectrum`` that have dimensionless heterogeneity index as a parameter to characterize a stochastic permeability field. We illustrate this method by analyzing field tracer data. The third section of this report describes a new theory for interpreting interwell tracer data in terms of channeling and dispersive behavior for reservoirs. Once again, a stochastic approach to reservoir description is taken. The fourth section of this report describes our simulation of perfluorocarbon gas tracers. This new tracer technology developed at Brookhaven National Laboratory is being tested at the Elk Hills Naval Petroleum Reserve No. 1 in California. We report preliminary simulations made of these tracers in one of the oil reservoirs under evaluation with these tracers in this field. Our compostional simulator (UTCOMP) was used for this simulation study.

Pope, G.A.; Sepehrnoori, K.

1992-12-31T23:59:59.000Z

133

PREP | National Nuclear Security Administration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006 TheSteven Ashby Dr. Steven AshbystationAbout UsBOEPREP | National

134

Estimates of Tracer-Based Piston-Flow Ages of Groundwater From Selected Sites: National Water-Quality Assessment  

E-Print Network [OSTI]

Estimates of Tracer-Based Piston-Flow Ages of Groundwater From Selected Sites: National Water;Estimates of Tracer-Based Piston-Flow Ages of Groundwater from Selected Sites: National Water.N., Busenberg, Eurybiades, Widman, P.K., Casile, G.C., and Wayland, J.E., 2010, Estimates of tracer-based piston

135

THE NEW YORK CITY URBAN DISPERSION PROGRAM MARCH 2005 FIELD STUDY: TRACER METHODS AND RESULTS.  

SciTech Connect (OSTI)

The Urban Dispersion Program March 2005 Field Study tracer releases, sampling, and analytical methods are described in detail. There were two days where tracer releases and sampling were conducted. A total of 16.0 g of six tracers were released during the first test day or Intensive Observation Period (IOP) 1 and 15.7 g during IOP 2. Three types of sampling instruments were used in this study. Sequential air samplers, or SAS, collected six-minute samples, while Brookhaven atmospheric tracer samplers (BATS) and personal air samplers (PAS) collected thirty-minute samples. There were a total of 1300 samples resulting from the two IOPs. Confidence limits in the sampling and analysis method were 20% as determined from 100 duplicate samples. The sample recovery rate was 84%. The integrally averaged 6-minute samples were compared to the 30-minute samples. The agreement was found to be good in most cases. The validity of using a background tracer to calculate sample volumes was examined and also found to have a confidence level of 20%. Methods for improving sampling and analysis are discussed. The data described in this report are available as Excel files. An additional Excel file of quality assured tracer data for use in model validation efforts is also available. The file consists of extensively quality assured BATS tracer data with background concentrations subtracted.

WATSON, T.B.; HEISER, J.; KALB, P.; DIETZ, R.N.; WILKE, R.; WIESER, R.; VIGNATO, G.

2005-10-01T23:59:59.000Z

136

Analysis of Injection-Backflow Tracer Tests in Fractured Geothermal Reservoirs  

SciTech Connect (OSTI)

Tracer tests have been an important technique for determining the flow and reservoir characteristics in various rock matrix systems. While the interwell tracer tests are aimed at the characterization of the regions between the wells, single-well injection-backflow tracer tests may be useful tools of preliminary evaluation, before implementing long term interwell tracer tests. This work is concerned with the quantitative evaluation of the tracer return profiles obtained from single well injection-backflow tracer tests. First, two mathematical models of tracer transport through fractures, have been reviewed. These two models are based on two different principles: Taylor Dispersion along the fracture and simultaneous diffusion in and out of the adjacent matrix. Then the governing equations for the transport during the injection-backflow tests have been solved. Finally the results were applied to field data obtained from Raft River and East Mesa geothermal fields. In order to determine the values of the parameters of the models that define the transport mechanisms through fractures a non-linear optimization technique was employed. 26 refs., 10 figs.

Kocabas, I.; Horne, R.N.

1987-01-20T23:59:59.000Z

137

Tracers for monitoring the activity of sodium/glucose cotransporters in health and disease  

DOE Patents [OSTI]

Radiolabeled tracers for sodium/glucose cotransporters (SGLTs), their synthesis, and their use are provided. The tracers are methyl or ethyl pyranosides having an equatorial hydroxyl group at carbon-2 and a C 1 preferred conformation, radiolabeled with .sup.18F, .sup.123I, or .sup.124I, or free hexoses radiolabeled with .sup.18F, .sup.123I, or .sup.124. Also provided are in vivo and in vitro techniques for using these and other tracers as analytical and diagnostic tools to study glucose transport, in health and disease, and to evaluate therapeutic interventions.

Wright, Ernest M; Barrio, Jorge R; Hirayama, Bruce A; Kepe, Vladimir

2014-09-30T23:59:59.000Z

138

Environmental Tracers for Determining Water Resource Vulnerability to Climate Change  

SciTech Connect (OSTI)

Predicted changes in the climate will have profound impacts on water availability in the Western US, but large uncertainties exist in our ability to predict how natural and engineered hydrological systems will respond. Most predictions suggest that the impacts of climate change on California water resources are likely to include a decrease in the percentage of precipitation that falls as snow, earlier onset of snow-pack melting, and an increase in the number of rain on snow events. These processes will require changes in infrastructure for water storage and flood control, since much of our current water supply system is built around the storage of winter precipitation as mountain snow pack. Alpine aquifers play a critical role by storing and releasing snowmelt as baseflow to streams long after seasonal precipitation and the disappearance of the snow pack, and in this manner significantly impact the stream flow that drives our water distribution systems. Mountain groundwater recharge and, in particular, the contribution of snowmelt to recharge and baseflow, has been identified as a potentially significant effect missing from current climate change impact studies. The goal of this work is to understand the behavior of critical hydrologic systems, with an emphasis on providing ground truth for next generation models of climate-water system interactions by implementing LLNL capabilities in environmental tracer and isotopic science. We are using noble gas concentrations and multiple isotopic tracers ({sup 3}H/{sup 3}He, {sup 35}S, {sup 222}Rn, {sup 2}H/{sup 1}H, {sup 18}O/{sup 16}O, and {sup 13}C/{sup 12}C) in groundwater and stream water in a small alpine catchment to (1) provide a snapshot of temperature, altitude, and physical processes at the time of recharge, (2) determine subsurface residence times (over time scales ranging from months to decades) of different groundwater age components, and (3) deconvolve the contribution of these different groundwater components to alpine stream baseflow. This research is showing that groundwater in alpine areas spends between a few years to several decades in the saturated zone below the surface, before feeding into streams or being pumped for use. This lag time may act to reduce the impact on water resources from extreme wet or dry years. Furthermore, our measurements show that the temperature of water when it reaches the water table during recharge is 4 to 9 degrees higher than would be expected for direct influx of snowmelt, and that recharge likely occurs over diffuse vegetated areas, rather than along exposed rock faces and fractures. These discoveries have implications for how alpine basins will respond to climate effects that lead to more rain than snow and earlier snow pack melting.

Singleton, M

2009-07-08T23:59:59.000Z

139

Chemical tracers of episodic accretion in low-mass protostars  

E-Print Network [OSTI]

Aims: Accretion rates in low-mass protostars can be highly variable in time. Each accretion burst is accompanied by a temporary increase in luminosity, heating up the circumstellar envelope and altering the chemical composition of the gas and dust. This paper aims to study such chemical effects and discusses the feasibility of using molecular spectroscopy as a tracer of episodic accretion rates and timescales. Methods: We simulate a strong accretion burst in a diverse sample of 25 spherical envelope models by increasing the luminosity to 100 times the observed value. Using a comprehensive gas-grain network, we follow the chemical evolution during the burst and for up to 10^5 yr after the system returns to quiescence. The resulting abundance profiles are fed into a line radiative transfer code to simulate rotational spectra of C18O, HCO+, H13CO+, and N2H+ at a series of time steps. We compare these spectra to observations taken from the literature and to previously unpublished data of HCO+ and N2H+ 6-5 from th...

Visser, Ruud; Jorgensen, Jes K

2015-01-01T23:59:59.000Z

140

Tracer diffusion in compacted, water-saturated bentonite  

SciTech Connect (OSTI)

Compacted Na-bentonite clay barriers, widely used in theisolation of solid-waste landfills and other contaminated sites, havebeen proposed for a similar use in the disposal of high-level radioactivewaste. Molecular diffusion through the pore space in these barriers playsa key role in their performance, thus motivating recent measurements ofthe apparent diffusion coefficient tensor of water tracers in compacted,water-saturated Na-bentonites. In the present study, we introduce aconceptual model in which the pore space of water-saturated bentonite isdivided into 'macropore' and 'interlayer nanopore' compartments. Withthis model we determine quantitatively the relative contributions ofpore-network geometry (expressed as a geometric factor) and of thediffusive behavior of water molecules near montmorillonite basal surfaces(expressed as a contristivity factor) to the apparent diffusioncoefficient tensor. Our model predicts, in agreement with experiment,that the mean principal value of the apparent diffusion coefficienttensor follows a single relationship when plotted against the partialmontmorillonite dry density (mass of montmorillonite per combined volumeof montmorillonite and pore space). Using a single fitted parameter, themean principal geometric factor, our model successfully describes thisrelationship for a broad range of bentonite-water system, from dilute gelto highly-compacted bentonite with 80 percent of its pore water ininterlayer nanopores.

Bourg, Ian C.; Sposito, Garrison; Bourg, Alain C.M.

2005-08-04T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Radium isotopes as tracers of coastal circulation pathways in the Mid-Atlantic Blight  

E-Print Network [OSTI]

Pathways of exchange between the shelf and slope in the Mid-Atlantic Bight were investigated using a combination of radiochemical tracer and hydrographic measurements. The motivation was to provide evidence of transport ...

Rasmussen, Linda L

2003-01-01T23:59:59.000Z

142

The use of tracers to analyze the effects of reinjection into fractured geothermal reservoirs  

SciTech Connect (OSTI)

This paper discusses the use of tracers as a reservoir engineering tool in fractured geothermal reservoirs. The principle concern in injecting cooler spent fluids into a fractured reservoir is that the fluids may move through high permeability channels and return to the production wells after contacting a relatively small volume of rock. As a consequence of this rapid transport, the fluids will be only partially reheated and after a short period time will effectively mine the heat from the limited volume of rock. The production wells will then experience a rapid and premature reduction in thermal output. Tracers can be used to infer the existence of high mobility conduits between injection and production wells and to monitor chemical changes of an injected fluid. Since tracer arrival precedes thermal breakthrough, tracer tests are a very useful forecasting tool.

Horne, R.N.; Johns, R.A.; Adams, M.C.; Moore, J.N.; Stiger, S.G.

1987-01-01T23:59:59.000Z

143

Dynamic Reservoir Characterization Of Naturally Fractured Reservoirs From An Inter-Well Tracer Test  

E-Print Network [OSTI]

After field redevelopment in the Sherrod Unit of the Spraberry Trend Area, an inter-well tracer test was conducted at the field scale in order to understand the fracture system, which forms preferential flow paths for better management...

Kilicaslan, Ufuk

2013-12-03T23:59:59.000Z

144

Development of Models to Simulate Tracer Behavior in Enhanced Geothermal Systems  

SciTech Connect (OSTI)

A recent report found that power and heat produced from engineered (or enhanced) geothermal systems (EGSs) could have a major impact on the United States while incurring minimal environmental impacts. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distributions, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for commercial development of geothermal energy. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. Modeling capabilities are being developed as part of this project to support laboratory and field testing to characterize engineered geothermal systems in single- and multi-well tests using tracers. The objective of this report is to describe the simulation plan and the status of model development for simulating tracer tests for characterizing EGS.

Williams, Mark D.; Vermeul, Vincent R.; Reimus, P. W.; Newell, D.; Watson, Tom B.

2010-06-01T23:59:59.000Z

145

Author's personal copy Thorium-234 as a tracer of spatial, temporal and vertical variability  

E-Print Network [OSTI]

Author's personal copy Thorium-234 as a tracer of spatial, temporal and vertical variability 2009 Accepted 6 April 2009 Available online 16 April 2009 Keywords: Thorium-234 Particle flux Sediment

Buesseler, Ken

146

CHEMICAL TRACER RETENTION IN POROUS MEDIA Submitted to the Department of Petroleum Engineering  

E-Print Network [OSTI]

* CHEMICAL TRACER RETENTION IN POROUS MEDIA A Report Submitted to the Department of Petroleum Engineering of Stanford University in Fulfillment of the Requirement for the Degree of Master of Science

Stanford University

147

Glass mixing theory and tracer study results from the SF-10 run  

SciTech Connect (OSTI)

A general, partial differential equation governing glass mixing in the Slurry Fed Ceramic Melter (SFCM) was derived and a solution obtained based upon certain simplifying assumptions. Tracer studies were then conducted in the SFCM during the SF-10 run to test the theory and characterize glass mixing in this melter. Analysis of the tracer data shows that glass mixing in the SFCM can be explained by use of a model of two, well-mixed tanks in series.

Bowman, B.W.; Routt, K.R.

1988-08-01T23:59:59.000Z

148

Lévy Fluctuations and Tracer Diffusion in Dilute Suspensions of Algae and Bacteria  

E-Print Network [OSTI]

Swimming microorganisms rely on effective mixing strategies to achieve efficient nutrient influx. Recent experiments, probing the mixing capability of unicellular biflagellates, revealed that passive tracer particles exhibit anomalous non-Gaussian diffusion when immersed in a dilute suspension of self-motile Chlamydomonas reinhardtii algae. Qualitatively, this observation can be explained by the fact that the algae induce a fluid flow that may occasionally accelerate the colloidal tracers to relatively large velocities. A satisfactory quantitative theory of enhanced mixing in dilute active suspensions, however, is lacking at present. In particular, it is unclear how non-Gaussian signatures in the tracers' position distribution are linked to the self-propulsion mechanism of a microorganism. Here, we develop a systematic theoretical description of anomalous tracer diffusion in active suspensions, based on a simplified tracer-swimmer interaction model that captures the typical distance scaling of a microswimmer's flow field. We show that the experimentally observed non-Gaussian tails are generic and arise due to a combination of truncated L\\'evy statistics for the velocity field and algebraically decaying time correlations in the fluid. Our analytical considerations are illustrated through extensive simulations, implemented on graphics processing units to achieve the large sample sizes required for analyzing the tails of the tracer distributions.

Irwin M. Zaid; Jörn Dunkel; Julia M. Yeomans

2010-09-20T23:59:59.000Z

149

This page intentionally left blank This page intentionally left blank  

E-Print Network [OSTI]

States Navy, as the maritime component of the Department of Defense, has global leadership the Region's abundant resources and trade routes. Due to the significant retreat of sea ice, previously and gas development, fishing, tourism, and mineral mining could alter the Region's strategic importance

Howat, Ian M.

150

Laboratory testing and modeling to evaluate perfluorocarbon compounds as tracers in geothermal systems  

SciTech Connect (OSTI)

The thermal stability and adsorption characteristics of three perfluorinated hydrocarbon compounds were evaluated under geothermal conditions to determine the potential to use these compounds as conservative or thermally-degrading tracers in Engineered (or Enhanced) Geothermal Systems (EGS). The three compounds tested were perfluorodimethyl-cyclobutane (PDCB), perfluoromethylcyclohexane (PMCH), and perfluorotrimethylcyclohexane (PTCH), which are collectively referred to as perfluorinated tracers, or PFTs. Two sets of duplicate tests were conducted in batch mode in gold-bag reactors, with one pair of reactors charged with a synthetic geothermal brine containing the PFTs and a second pair was charged with the brine-PFT mixture plus a mineral assemblage chosen to be representative of activated fractures in an EGS reservoir. A fifth reactor was charged with deionized water containing the three PFTs. The experiments were conducted at {approx}100 bar, with temperatures ranging from 230 C to 300 C. Semi-analytical and numerical modeling was also conducted to show how the PFTs could be used in conjunction with other tracers to interrogate surface area to volume ratios and temperature profiles in EGS reservoirs. Both single-well and cross-hole tracer tests are simulated to illustrate how different suites of tracers could be used to accomplish these objectives. The single-well tests are especially attractive for EGS applications because they allow the effectiveness of a stimulation to be evaluated without drilling a second well.

Reimus, Paul W [Los Alamos National Laboratory

2011-01-21T23:59:59.000Z

151

Results of injection and tracer tests in Olkaria north east field in Kenya  

SciTech Connect (OSTI)

Tracer and injection tests were performed in the Olkaria North East Field with the objective to reduce uncertainty in the engineering design and to determine the suitability of well OW-704 as a re-injection well for the waste brine from the steam field during production. An organic dye (sodium fluorescein) was injected into well OW-704 as a slug. The tracer returns were observed in well OW-M2 which is 580 m deep, 620 m from well OW-704 and well OW-716 which is 900 m from well OW-704. The other wells on discharge, OW-714, and OW-725 did not show any tracer returns. However, other chemical constituents suggested., that well OW-716 experienced a chemical breakthrough earlier than OW-M2. Tracer return velocities of 0.31 m/hr and 1.3 m/hr were observed. Results of the tracer and injection tests indicate that OW-704 may be used as a re-injection well provided a close monitoring program is put in place.

Karingithi, C.W. [Kenya Power Company Ltd., Naivasha (Kenya)

1995-12-31T23:59:59.000Z

152

Advancing reactive tracer methods for measuring thermal evolution in CO2-and water-based geothermal reservoirs  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Presentation. This project aims to develop reactive tracer method for monitoring thermal drawdown in enhanced geothermal systems.

153

iBlank Portrait Template  

Office of Environmental Management (EM)

VA 22209-1728 Phone: (703) 522-0086 | Fax: (703) 522-0548 Email: hpbamail@hpba.org Web Site: www.hpba.org HPBA Comments NOPR on Energy Conservation Standards for Direct...

154

iBlank Portrait Template  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Owned SmallOf TheViolationsRio Blanco ResponsibleSuite 600, 1901 North Moore

155

THIS PAGE INTENTIONALLY LEFT BLANK  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of Energy StrainClient update resolve008Energy 8 -THEShaleTHIS PAGE

156

A comprehensive study of the analysis and economic benefits of radioactive tracer engineered simulation procedures  

SciTech Connect (OSTI)

Hydraulic Fracturing is an important technology to enhance production from tight gas reservoirs. Several techniques have been utilized to attempt to evaluate the effectiveness of hydraulic fracturing treatments. One technique, radioactive tracers, is currently used on over 15 % of the stimulation treatments performed in the U.S. With proper materials, design, and execution, tracers can be used to locate the presence and concentration of proppant at the wellbore in order to evaluate vertical and radial proppant distribution. A comprehensive study of over 100 fracture treatments has been completed in which radioactive tracers were used along with production logs, stress logs, post-fracturing completion reports, and production history to analyze completion effectiveness in four different reservoirs. Additionally, an economic benefit model was constructed to evaluate the benefit/cost ratio of applying the technology.

Fisher, K.; Robinson, B.M.; Voneiff, G.W.

1995-12-31T23:59:59.000Z

157

Enthalpy and mass flowrate measurements for two-phase geothermal production by Tracer dilution techniques  

SciTech Connect (OSTI)

A new technique has been developed for the measurement of steam mass flowrate, water mass flowrate and total enthalpy of two-phase fluids produced from geothermal wells. The method involves precisely metered injection of liquid and vapor phase tracers into the two-phase production pipeline and concurrent sampling of each phase downstream of the injection point. Subsequent chemical analysis of the steam and water samples for tracer content enables the calculation of mass flowrate for each phase given the known mass injection rates of tracer. This technique has now been used extensively at the Coso geothermal project, owned and operated by California Energy Company. Initial validation of the method was performed at the Roosevelt Hot Springs geothermal project on wells producing to individual production separators equipped with orificeplate flowmeters for each phase.

Hirtz, Paul; Lovekin, Jim; Copp, John; Buck, Cliff; Adams, Mike

1993-01-28T23:59:59.000Z

158

Interpretations of Tracer Tests Performed in the Culebra Dolomite at the Waste Isolation Pilot Plant Site  

SciTech Connect (OSTI)

This report provides (1) an overview of all tracer testing conducted in the Culebra Dolomite Member of the Rustler Formation at the Waste Isolation Pilot Plant (WPP) site, (2) a detailed description of the important information about the 1995-96 tracer tests and the current interpretations of the data, and (3) a summary of the knowledge gained to date through tracer testing in the Culebra. Tracer tests have been used to identify transport processes occurring within the Culebra and quantify relevant parameters for use in performance assessment of the WIPP. The data, especially those from the tests performed in 1995-96, provide valuable insight into transport processes within the Culebra. Interpretations of the tracer tests in combination with geologic information, hydraulic-test information, and laboratory studies have resulted in a greatly improved conceptual model of transport processes within the Culebra. At locations where the transmissivity of the Culebra is low (< 4 x 10{sup -6} m{sup 2}/s), we conceptualize the Culebra as a single-porosity medium in which advection occurs largely through the primary porosity of the dolomite matrix. At locations where the transmissivity of the Culebra is high (> 4 x 10{sup -6} m{sup 2}/s), we conceptualize the Culebra as a heterogeneous, layered, fractured medium in which advection occurs largely through fractures and solutes diffuse between fractures and matrix at multiple rates. The variations in diffusion rate can be attributed to both variations in fracture spacing (or the spacing of advective pathways) and matrix heterogeneity. Flow and transport appear to be concentrated in the lower Culebra. At all locations, diffusion is the dominant transport process in the portions of the matrix that tracer does not access by flow.

MEIGS,LUCY C.; BEAUHEIM,RICHARD L.; JONES,TOYA L.

2000-08-01T23:59:59.000Z

159

Estimation of Fracture Porosity in an Unsaturated Fractured Welded Tuff Using Gas Tracer Testing  

SciTech Connect (OSTI)

Kinematic fracture porosity is an important hydrologic transport parameter for predicting the potential of rapid contaminant migration through fractured rock. The transport velocity of a solute moving within a fracture network is inversely related to the fracture porosity. Since fracture porosity is often one or two orders of magnitude smaller than matrix porosity, and fracture permeability is often orders of magnitude greater than matrix permeability, solutes may travel significantly faster in the fracture network than in the surrounding matrix. This dissertation introduces a new methodology for conducting gas tracer tests using a field portable mass spectrometer along with analytical tools for estimating fracture porosity using the measured tracer concentration breakthrough curves. Field experiments were conducted at Yucca Mountain, Nevada, consisting of air-permeability transient testing and gas-tracer-transport tests. The experiments were conducted from boreholes drilled within an underground tunnel as part of an investigation of rock mass hydrological behavior. Air-permeability pressure transients, recorded during constant mass flux injections, have been analyzed using a numerical inversion procedure to identify fracture permeability and porosity. Dipole gas tracer tests have also been conducted from the same boreholes used for air-permeability testing. Mass breakthrough data has been analyzed using a random walk particle-tracking model, with a dispersivity that is a function of the advective velocity. The estimated fracture porosity using the tracer test and air-injection test data ranges from .001 to .015. These values are an order of magnitude greater than the values estimated by others using hydraulically estimated fracture apertures. The estimates of porosity made using air-permeability test data are shown to be highly sensitive to formation heterogeneity. Uncertainty analyses performed on the gas tracer test results show high confidence in the parameter estimates made.

B.M. Freifeild

2001-10-18T23:59:59.000Z

160

An Integrated Approach to Characterizing Bypassed Oil in Heterogeneous and Fractured Reservoirs Using Partitioning Tracers  

SciTech Connect (OSTI)

We explore the use of efficient streamline-based simulation approaches for modeling partitioning interwell tracer tests in hydrocarbon reservoirs. Specifically, we utilize the unique features of streamline models to develop an efficient approach for interpretation and history matching of field tracer response. A critical aspect here is the underdetermined and highly ill-posed nature of the associated inverse problems. We have investigated the relative merits of the traditional history matching ('amplitude inversion') and a novel travel time inversion in terms of robustness of the method and convergence behavior of the solution. We show that the traditional amplitude inversion is orders of magnitude more non-linear and the solution here is likely to get trapped in local minimum, leading to inadequate history match. The proposed travel time inversion is shown to be extremely efficient and robust for practical field applications. The streamline approach is generalized to model water injection in naturally fractured reservoirs through the use of a dual media approach. The fractures and matrix are treated as separate continua that are connected through a transfer function, as in conventional finite difference simulators for modeling fractured systems. A detailed comparison with a commercial finite difference simulator shows very good agreement. Furthermore, an examination of the scaling behavior of the computation time indicates that the streamline approach is likely to result in significant savings for large-scale field applications. We also propose a novel approach to history matching finite-difference models that combines the advantage of the streamline models with the versatility of finite-difference simulation. In our approach, we utilize the streamline-derived sensitivities to facilitate history matching during finite-difference simulation. The use of finite-difference model allows us to account for detailed process physics and compressibility effects. The approach is very fast and avoids much of the subjective judgments and time-consuming trial-and-errors associated with manual history matching. We demonstrate the power and utility of our approach using a synthetic example and two field examples. We have also explored the use of a finite difference reservoir simulator, UTCHEM, for field-scale design and optimization of partitioning interwell tracer tests. The finite-difference model allows us to include detailed physics associated with reactive tracer transport, particularly those related with transverse and cross-streamline mechanisms. We have investigated the potential use of downhole tracer samplers and also the use of natural tracers for the design of partitioning tracer tests. Finally, we discuss several alternative ways of using partitioning interwell tracer tests (PITTs) in oil fields for the calculation of oil saturation, swept pore volume and sweep efficiency, and assess the accuracy of such tests under a variety of reservoir conditions.

Akhil Datta-Gupta

2006-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Using Thermally-Degrading, Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and Fracture/Heat Transfer Surface Area in Geothermal Reservoirs  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Project Summary. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate quantitative characterization of temperature distributions and surface area available for heat transfer in EGS.

162

Fracture Model, Ground Displacements and Tracer Observations: Fruitland Coals, San Juan Basin, New Mexico,  

E-Print Network [OSTI]

that the coal reservoirs consist of six separate coal beds rather than three. Perfluorocarbon tracer monitoring the site consist of two coal beds, each separated by a shale parting. This observation indicates will improve our understanding of Fruitland coal reservoirs; help develop more effective strategies to enhance

Wilson, Thomas H.

163

Physical causes and modeling challenges of anomalous diffusion of sediment tracers  

E-Print Network [OSTI]

Physical causes and modeling challenges of anomalous diffusion of sediment tracers Douglas Jerolmack Earth & Environmental Science, UPenn [sediment@sas.upenn.edu] "Bridging the Gap", Princeton U., 2" describable by: 1. Particle volume, v [L3 ]. 2.Average velocity, us , of bed load sediment [L/T]. 3. Surface

164

BOREHOLE RADAR ATTENUATION-DIFFERENCE TOMOGRAPHY DURING THE TRACER/TIME-LAPSE TEST AT THE BOISE  

E-Print Network [OSTI]

to those suggested by radar level run attenuation differences, shot-receiver attenuation difference be explained by the difference in support volumes for the radar and chemistry measurements, and alsoBOREHOLE RADAR ATTENUATION-DIFFERENCE TOMOGRAPHY DURING THE TRACER/TIME-LAPSE TEST AT THE BOISE

Barrash, Warren

165

Project EARTH-14-SHELLDP1: Developing Metal Isotope Tracers for Understanding Sediment Depositional Environments  

E-Print Network [OSTI]

Project EARTH-14-SHELLDP1: Developing Metal Isotope Tracers for Understanding Sediment Depositional and the mechanisms behind temporal and spatial variations in organic matter quantity and quality. The project work will involve becoming proficient in clean room procedures, chemical separation techniques

Henderson, Gideon

166

Ca and 87/86 Sr isotopes as tracers of silicate weathering in small  

E-Print Network [OSTI]

44/40 Ca and 87/86 Sr isotopes as tracers of silicate weathering in small catchments of the Massif, Laboratory Division, Orléans, France 2 U.S. Geological Survey, Water Resources Division, Menlo Park, CA 94025).Measurements of 44/40 Ca isotope ratios (44/40 Ca measured by the double spike method on TIMS and normalized

Paris-Sud XI, Université de

167

TRACER: A Trace Replay Tool to Evaluate Energy-Efficiency of Mass Storage Systems  

E-Print Network [OSTI]

TRACER: A Trace Replay Tool to Evaluate Energy-Efficiency of Mass Storage Systems Zhuo Liu1 , Fei of accurately evaluating energy-efficient storage systems and objectively comparing a wide range of energy RAID5 enterprise disk array. Our experiments demonstrate that energy-efficient mass storage systems can

Qin, Xiao

168

ADVANCING REACTIVE TRACER METHODS FOR MONITORING THERMAL DRAWDOWN IN GEOTHERMAL ENHANCED GEOTHERMAL RESERVOIRS  

SciTech Connect (OSTI)

Reactive tracers have long been considered a possible means of measuring thermal drawdown in a geothermal system, before significant cooling occurs at the extraction well. Here, we examine the sensitivity of the proposed method to evaluate reservoir cooling and demonstrate that while the sensitivity of the method as generally proposed is low, it may be practical under certain conditions.

Mitchell A. Plummer; Carl D. Palmer; Earl D. Mattson; George D. Redden; Laurence C. Hull

2010-10-01T23:59:59.000Z

169

Near-Infrared Gold Nanocages as a New Class of Tracers for Photoacoustic  

E-Print Network [OSTI]

radiation damage to the connective tissues of the skin. Therefore, noninvasive, nonionizing, and highNear-Infrared Gold Nanocages as a New Class of Tracers for Photoacoustic Sentinel Lymph Node based on Au nanocages shows a number of attractive features: noninvasiveness, strong optical absorption

Wang, Lihong

170

Evaluating the ability of a numerical weather prediction model to forecast tracer concentrations during ETEX 2  

E-Print Network [OSTI]

Evaluating the ability of a numerical weather prediction model to forecast tracer concentrations an operational numerical weather prediction model to forecast air quality are also investigated. These potential a numerical weather prediction (NWP) model independently of the CTM. The NWP output is typically archived

Dacre, Helen

171

Ammonium transport and reaction in contaminated groundwater: Application of isotope tracers and isotope fractionation studies  

E-Print Network [OSTI]

Ammonium transport and reaction in contaminated groundwater: Application of isotope tracers the groundwater velocity. Retardation factors and groundwater ages indicate that much of the NH4 + in the plume was recharged early in the history of the wastewater disposal. NO3 Ã? and excess N2 gas, which were related

172

Tracer studies of pathways and rates of meltwater transport through Arctic summer sea ice  

E-Print Network [OSTI]

Tracer studies of pathways and rates of meltwater transport through Arctic summer sea ice H. Eicken) program's field site in the northern Chukchi Sea, snow and ice meltwater flow was found to have a strong impact on the heat and mass balance of sea ice during the summer of 1998. Pathways and rates of meltwater

Eicken, Hajo

173

Seasonal Variation in Monthly Average Air Change Rates Using Passive Tracer Gas Measurements  

E-Print Network [OSTI]

of indoor air pollution sources. Concurrently, great efforts are made to make buildings energy efficient 1970s, while less attention has been paid to IAQ. Insufficient venting of indoor air pollutantsSeasonal Variation in Monthly Average Air Change Rates Using Passive Tracer Gas Measurements Marie

Hansen, René Rydhof

174

Using chemical tracers in hillslope soils to estimate the importance of chemical denudation under  

E-Print Network [OSTI]

also examine relationships between transient mechanical and chemical denudation rates. Soil particle, burrowing by mammals, or freeze-thaw mechanisms [e.g., see Birkeland, 1999]. Once created, mobile soilUsing chemical tracers in hillslope soils to estimate the importance of chemical denudation under

175

Controls on soil methane fluxes: Tests of biophysical mechanisms using stable isotope tracers  

E-Print Network [OSTI]

Controls on soil methane fluxes: Tests of biophysical mechanisms using stable isotope tracers November 2006; published 4 May 2007. [1] Understanding factors that control methane exchange between soils-based technique to investigate the relative importance of three mechanisms for explaining landscape

176

Tracer Gas as a Practical Field Diagnostic Tool for Assessing Duct System Leaks  

E-Print Network [OSTI]

diagnostic tools for detecting and locating leaks in the air distribution system. The tracer gas tests described are a good complement to these tools in the detection, location, and measurement of duct leakage. Testing for house infiltration once with the air...

Cummings, J. B.

1989-01-01T23:59:59.000Z

177

Lignin biomarkers as tracers of mercury sources in lakes water column  

E-Print Network [OSTI]

Lignin biomarkers as tracers of mercury sources in lakes water column Jean-Franc¸ois Ouellet � Marc the autochthonous from the allochthonous organic matter (OM), lignin derived biomarker signa- tures [Lambda, S/V, C/V, P/(V ? S), 3,5-Bd/V and (Ad/Al)v] were used. Since lignin is exclusively produced by terrigenous

Long, Bernard

178

ADVANCES IN ATMOSPHERIC SCIENCES, VOL. 25, NO. 5, 2008, 805814 Diagnosing Ocean Tracer Transport from Sellafield  

E-Print Network [OSTI]

DRANGE1,2,3,4 , and Eric DELEERSNIJDER5 1 Nansen Environmental and Remote Sensing Center, Bergen, Norway applications thereof, idealized releases of passive tracers from the nuclear fuel reprocessing plants­814, doi: 10.1007/s00376-008-0805-y. 1. Introduction Estimating the integrated effect of processes acting

Drange, Helge

179

Isotopic Tracer Studies of Reaction Pathways for Propane Oxidative Dehydrogenation on Molybdenum Oxide Catalysts  

E-Print Network [OSTI]

Isotopic Tracer Studies of Reaction Pathways for Propane Oxidative Dehydrogenation on Molybdenum of propane over ZrO2-supported MoOx catalysts. Competitive reactions of C3H6 and CH3 13 CH2CH3 showed combustion of propene, or by direct combustion of propane. A mixture of C3H8 and C3D8 undergoes oxidative

Iglesia, Enrique

180

New Tracers Identify Hydraulic Fracturing Fluids and Accidental Releases from Oil and Gas Operations  

E-Print Network [OSTI]

New Tracers Identify Hydraulic Fracturing Fluids and Accidental Releases from Oil and Gas produced waters sampled from conventional oil and gas wells. We posit that boron isotope geochemistry can tool is validated by examining the composition of effluent discharge from an oil and gas brine

Jackson, Robert B.

Note: This page contains sample records for the topic "tracer prep blanks" 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

Supporting BioMedical Information Retrieval: The BioTracer Approach  

E-Print Network [OSTI]

Supporting BioMedical Information Retrieval: The BioTracer Approach Heri Ramampiaro1 and Chen Li2 1 biomedical in- formation has put a high demand on existing search systems. Such a tool should be able the relevant ones the highest rank- ing. Focusing on biomedical information, this work investigates how

Li, Chen

182

Advancing Reactive Tracer Methods for Measurement of Thermal Evolution in Geothermal Reservoirs: Final Report  

SciTech Connect (OSTI)

The injection of cold fluids into engineered geothermal system (EGS) and conventional geothermal reservoirs may be done to help extract heat from the subsurface or to maintain pressures within the reservoir (e.g., Rose et al., 2001). As these injected fluids move along fractures, they acquire heat from the rock matrix and remove it from the reservoir as they are extracted to the surface. A consequence of such injection is the migration of a cold-fluid front through the reservoir (Figure 1) that could eventually reach the production well and result in the lowering of the temperature of the produced fluids (thermal breakthrough). Efficient operation of an EGS as well as conventional geothermal systems involving cold-fluid injection requires accurate and timely information about thermal depletion of the reservoir in response to operation. In particular, accurate predictions of the time to thermal breakthrough and subsequent rate of thermal drawdown are necessary for reservoir management, design of fracture stimulation and well drilling programs, and forecasting of economic return. A potential method for estimating migration of a cold front between an injection well and a production well is through application of reactive tracer tests, using chemical whose rate of degradation is dependent on the reservoir temperature between the two wells (e.g., Robinson 1985). With repeated tests, the rate of migration of the thermal front can be determined, and the time to thermal breakthrough calculated. While the basic theory behind the concept of thermal tracers has been understood for some time, effective application of the method has yet to be demonstrated. This report describes results of a study that used several methods to investigate application of reactive tracers to monitoring the thermal evolution of a geothermal reservoir. These methods included (1) mathematical investigation of the sensitivity of known and hypothetical reactive tracers, (2) laboratory testing of novel tracers that would improve method sensitivity, (3) development of a software tool for design and interpretation of reactive tracer tests and (4) field testing of the reactive tracer temperature monitoring concept.

Mitchell A. Plummer; Carl D. Palmer; Earl D. Mattson; Laurence C. Hull; George D. Redden

2011-07-01T23:59:59.000Z

183

Evidence of Multi-Process Matrix Diffusion in a Single Fracturefrom a Field Tracer Test  

SciTech Connect (OSTI)

Compared to values inferred from laboratory tests on matrix cores, many field tracer tests in fractured rock have shown enhanced matrix diffusion coefficient values (obtained using a single-process matrix-diffusion model with a homogeneous matrix diffusion coefficient). To investigate this phenomenon, a conceptual model of multi-process matrix diffusion in a single-fracture system was developed. In this model, three matrix diffusion processes of different diffusion rates were assumed to coexist: (1) diffusion into stagnant water and infilling materials within fractures, (2) diffusion into a degraded matrix zone, and (3) further diffusion into an intact matrix zone. The validity of the conceptual model was then demonstrated by analyzing a unique tracer test conducted using a long-time constant-concentration injection. The tracer-test analysis was conducted using a numerical model capable of tracking the multiple matrix-diffusion processes. The analysis showed that in the degraded zone, a diffusion process with an enhanced diffusion rate controlled the steep rising limb and decay-like falling limb in the observed breakthrough curve, whereas in the intact matrix zone, a process involving a lower diffusion rate affected the long-term middle platform of slowly increasing tracer concentration. The different matrix-diffusion-coefficient values revealed from the field tracer test are consistent with the variability of matrix diffusion coefficient measured for rock cores with different degrees of fracture coating at the same site. By comparing to the matrix diffusion coefficient calibrated using single-process matrix diffusion, we demonstrated that this multi-process matrix diffusion may contribute to the enhanced matrix-diffusion-coefficient values for single-fracture systems at the field scale.

Zhou, Quanlin; Liu, Hui-Hai; Bodvarsson, Gudmundur; Molz, Fred J.

2005-06-11T23:59:59.000Z

184

Overview of SIMS-Based Experimental Studies of Tracer Diffusion in Solids and Application to Mg Self-Diffusion  

SciTech Connect (OSTI)

Tracer diffusivities provide the most fundamental information on diffusion in materials and are the foundation of robust diffusion databases. Compared to traditional radiotracer techniques that utilize radioactive isotopes, the secondary ion mass spectrometry (SIMS) based thin-film technique for tracer diffusion is based on the use of enriched stable isotopes that can be accurately profiled using SIMS. Experimental procedures & techniques that are utilized for the measurement of tracer diffusion coefficients are presented for pure magnesium, which presents some unique challenges due to the ease of oxidation. The development of a modified Shewmon-Rhines diffusion capsule for annealing Mg and an ultra-high vacuum (UHV) system for sputter deposition of Mg isotopes are discussed. Optimized conditions for accurate SIMS depth profiling in polycrystalline Mg are provided. An automated procedure for the correction of heat-up and cool-down times during tracer diffusion annealing is discussed. The non-linear fitting of a SIMS depth profile data using the thin film Gaussian solution to obtain the tracer diffusivity along with the background tracer concentration and tracer film thickness is discussed. An Arrhenius fit of the Mg self-diffusion data obtained using the low-temperature SIMS measurements from this study and the high-temperature radiotracer measurements of Shewmon and Rhines (1954) was found to be a good representation of both types of diffusion data that cover a broad range of temperatures between 250 - 627 C (523 900 K).

Kulkarni, Nagraj S [ORNL; Warmack, Robert J Bruce [ORNL; Radhakrishnan, Balasubramaniam [ORNL; HunterJr., Jerry [Virginia Polytechnic Institute and State University; Sohn, Yong Ho [University of Central Florida; Coffey, Kevin [University of Central Florida; Murch, Prof. Graeme [University of Newcastle, NSW, Australia; Belova, Irina [University of Newcastle, NSW, Australia

2014-01-01T23:59:59.000Z

185

USING PERFLUOROCARBON TRACERS FOR VERIFICATION OF CAP AND COVER SYSTEMS PERFORMANCE.  

SciTech Connect (OSTI)

The Department of Energy (DOE) Environmental Management (EM) office has committed itself to an accelerated cleanup of its national facilities. The goal is to have much of the DOE legacy waste sites remediated by 2006. This includes closure of several sites (e.g., Rocky Flats and Fernald). With the increased focus on accelerated cleanup, there has been considerable concern about long-term stewardship issues in general, and verification and long-term monitoring (LTM) of caps and covers, in particular. Cap and cover systems (covers) are vital remedial options that will be extensively used in meeting these 2006 cleanup goals. Every buried waste site within the DOE complex will require some form of cover system. These covers are expected to last from 100 to 1000 years or more. The stakeholders can be expected to focus on system durability and sustained performance. DOE EM has set up a national committee of experts to develop a long-term capping (LTC) guidance document. Covers are subject to subsidence, erosion, desiccation, animal intrusion, plant root infiltration, etc., all of which will affect the overall performance of the cover. Very little is available in terms of long-term monitoring other than downstream groundwater or surface water monitoring. By its very nature, this can only indicate that failure of the cover system has already occurred and contaminants have been transported away from the site. This is unacceptable. Methods that indicate early cover failure (prior to contaminant release) or predict approaching cover failure are needed. The LTC committee has identified predictive monitoring technologies as a high priority need for DOE, both for new covers as well as existing covers. The same committee identified a Brookhaven National Laboratory (BNL) technology as one approach that may be capable of meeting the requirements for LTM. The Environmental Research and Technology Division (ERTD) at BNL developed a novel methodology for verifying and monitoring subsurface barriers (1,2). The technology uses perfluorocarbon tracers (PFTs) to determine flaws (e.g., holes or cracks) and high permeability areas in subsurface barriers. Gaseous tracers are injected on one side of the barrier and searched for on the opposite side of the barrier. The sampling grid, concentration, and time of arrival of the tracer(s) on the opposite side are used to determine the size and location of flaws and relative permeability of the barrier. In addition, there are multiple tracers available, which allows different tracers to be injected in different quadrants of the barrier. This yields additional information on transport phenomena of the barrier.

HEISER,J.; SULLIVAN,T.

2001-11-01T23:59:59.000Z

186

Hillslope Hydrological Processes in a Costa Rican Rainforest: Water Supply Partitioning Using Isotope Tracers  

E-Print Network [OSTI]

Blancas Hydroelectric Project, and for improved predictions in similar, ungauged watersheds (ICE 2002). Study Watershed The study watershed is located in San Juan de Peñas Blancas, east of the Cordillera de Tilarán mountain range backing up... peaks. These goals were accomplished by supplementing hydraulic and physical data already available at the site with use of isotope tracers. Methods Study Site The 2.2 ha watershed used in this research is located in Peñas Blancas, Costa Rica...

DuMont, Andrea Lyn

2014-04-24T23:59:59.000Z

187

Inversion of field-scale partitioning tracer response for characterizing oil saturation distribution: a streamline approach  

E-Print Network [OSTI]

INVERSION OF FIELD-SCALE PARTITIONING TRACER RESPONSE FOR CHARACTERIZING OIL SATURATION DISTRIBUTION: A STREAMLINE APPROACH A Thesis by PAVEL ALEXANDROVICH ILIASSOV Submitted to the Office of Graduate Studies of Texas A&M University... A Thesis by PAVEL ALEXANDROVICH ILIASSOV Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: c 4- Akhil Datta-Gupta (Chair of Committee...

Iliassov, Pavel Alexandrovich

2000-01-01T23:59:59.000Z

188

Flux Measurements of Volatile Organic Compounds from an Urban Tower Platform in Houston, Texas: Trends and Tracers  

E-Print Network [OSTI]

and traffic counts except during variable working hours. To assign measured fluxes to local sources, we tested a bulk flux footprint model (Kormann and Meixner model) designed for uniform emission surface areas in this urban, heterogeneous landscape. Tracer...

Hale, Martin C

2014-05-08T23:59:59.000Z

189

Integrated Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Presentation. This objective of this project is to develop an innovative approach to estimate fracture surface area and spacing through interpretation of signals of natural chemical and isotopic tracers.

190

Thorium-234 as a tracer of spatial, temporal and vertical variability in particle flux in the North Pacific  

E-Print Network [OSTI]

Thorium-234 as a tracer of spatial, temporal and vertical variability in particle flux in the North Available online 16 April 2009 Keywords: Thorium-234 Particle flux Sediment trap Scavenging North Pacific

Siegel, David A.

191

ELIXYS - a fully automated, three-reactor high-pressure radiosynthesizer for development and routine production of diverse PET tracers.  

E-Print Network [OSTI]

cancer treatment with PET/CT: does it make a difference? Jfor decentralized production of PET tracers. In Positronprobes FMAU, FHBG, and FHPG as PET imaging agents for HSV1-

2013-01-01T23:59:59.000Z

192

Interpreting Energy and Tracer Spectra of Upper-Ocean Turbulence in the Submesoscale Range (1–200 km)  

E-Print Network [OSTI]

Submesoscale (1–200 km) wavenumber spectra of kinetic and potential energy and tracer variance are obtained from in situ observations in the Gulf Stream region and in the eastern subtropical North Pacific. In the Gulf ...

Ferrari, Raffaele

193

High-resolution stratospheric tracer fields estimated from satellite observations using Lagrangian trajectory calculations  

SciTech Connect (OSTI)

A technique is introduced by which high-resolution tracer fields may be constructed from low-resolution satellite observations. The technique relies upon the continual cascade of tracer variance from large to small scales and makes use of wind fields generated by a data assimilation scheme. To demonstrate its usefulness, the technique has been applied in a study of isentropic distributions of nitrous oxide in the winter midstratosphere, using measurements made by the Improved Stratospheric and Mesospheric Sounder (ISAMS) instrument on the Upper Atmosphere Research Satellite (UARS). The results show that the high-resolution fields significantly increase the amount of information that is available from the satellite observations. The fields give insights into the characteristic structure and evolution of tracer distributions at scales that are normally obscured from view. Two results are particularly noteworthy. First, at the interface between low and middle latitudes there is evidence of active mixing. This mixing occurs on the eastern, equatorward side of air that is being drawn toward high latitudes around the polar vortex. Second, in the anticyclone, a complex pattern of transport is revealed. Air drawn in from low latitudes spirals together with ambient midlatitude air. Small scales are generated relatively slowly in the organized flow, and persistent filamentary structures, with transverse scales of hundreds of kilometers or greater, are seen.

Sutton, R.T.; Maclean, H.; Swinbank, R.; O`Neill, A.; Taylor, F.W. [Oxford Univ., Oxford (United Kingdom)] [Oxford Univ., Oxford (United Kingdom); [Meteorological Office, Bracknell, Berkshire (United Kingdom); [Univ. of Reading, Reading (United Kingdom)

1994-10-01T23:59:59.000Z

194

Uncertainties in Air Exchange using Continuous-Injection, Long-Term Sampling Tracer-Gas Methods  

SciTech Connect (OSTI)

The PerFluorocarbon Tracer (PFT) method is a low-cost approach commonly used for measuring air exchange in buildings using tracer gases. It is a specific application of the more general Continuous-Injection, Long-Term Sampling (CILTS) method. The technique is widely used but there has been little work on understanding the uncertainties (both precision and bias) associated with its use, particularly given that it is typically deployed by untrained or lightly trained people to minimize experimental costs. In this article we will conduct a first-principles error analysis to estimate the uncertainties and then compare that analysis to CILTS measurements that were over-sampled, through the use of multiple tracers and emitter and sampler distribution patterns, in three houses. We find that the CILTS method can have an overall uncertainty of 10-15percent in ideal circumstances, but that even in highly controlled field experiments done by trained experimenters expected uncertainties are about 20percent. In addition, there are many field conditions (such as open windows) where CILTS is not likely to provide any quantitative data. Even avoiding the worst situations of assumption violations CILTS should be considered as having a something like a ?factor of two? uncertainty for the broad field trials that it is typically used in. We provide guidance on how to deploy CILTS and design the experiment to minimize uncertainties.

Sherman, Max H.; Walker, Iain S.; Lunden, Melissa M.

2013-12-01T23:59:59.000Z

195

Field studies of streamflow generation using natural and injected tracers on Bickford and Walker Branch Watersheds  

SciTech Connect (OSTI)

Field studies of streamflow generation were undertaken on two forested watersheds, the West Road subcatchment of Bickford Watershed in central Massachusetts and the West Fork of Walker Branch Watershed in eastern Tennessee. A major component of the research was development of a two-stage methodology for the use of naturally-occurring {sup 222}Rn as a tracer. The first of the two stages was solving a mass-balance equation for {sup 222}Rn around a stream reach of interest in order to calculate Rn{sub q}, the {sup 222}Rn content of the lateral inflow to the reach; a conservative tracer (chloride) and a volatile tracer (propane) were injected into the study stream to account for lateral inflow to, and volatilization from, the study reach. The second stage involved quantitative comparison of Rn{sub q} to the measured {sup 222}Rn concentrations of different subsurface waters in order to assess how important these waters were in contributing lateral inflow to the stream reach.

Genereux, D.; Hemond, H. (Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Civil Engineering); Mulholland, P. (Oak Ridge National Lab., TN (United States))

1992-05-01T23:59:59.000Z

196

Comparison of observed and predicted short-term tracer gas concentrations in the atmosphere  

SciTech Connect (OSTI)

The Savannah River Laboratory is in the process of conducting a series of atmospheric tracer studies. The inert gas sulfurhexafluoride is released from a height of 62 m for 15 min and concentrations in air are measured on sampling arcs up to 30 km downwind of the release point. Maximum 15 min. air concentrations from 14 of these tracer tests have been compared with the ground-level, centerline air concentration predicted with a Gaussian plume atmospheric transport model using eight different sets of atmospheric dispersion parameters. Preliminary analysis of the results from these comparisons indicates that the dispersion parameters developed at Juelich, West Germany, based on tracers released from a height of 50 m, give the best overall agreement between the predicted and observed values. The median value of the ratio of predicted to observed air concentrations for this set of parameters is 1.3, and the correlation coefficient between the log of the predictions and the log of the observations is 0.72. For the commonly used Pasquill-Gifford dispersion parameters, the values of these same statistics are 4.4 and 0.68, respectively. The Gaussian plume model is widely used to predict air concentrations resulting from short-term radionuclide release to the atmosphere. The results of comparisons such as these must be considered whenever the Gaussian model is used for such purposes. 22 references, 3 tables.

Cotter, S.J.; Miller, C.W.; Lin, W.C.T.

1985-01-01T23:59:59.000Z

197

Semianalytical Solutions of Radioactive or Reactive Tracer Transport in Layered Fractured Media  

SciTech Connect (OSTI)

In this paper, semianalytical solutions are developed for the problem of transport of radioactive or reactive tracers (solutes or colloids) through a layered system of heterogeneous fractured media with misaligned fractures. The tracer transport equations in the matrix account for (a) diffusion, (b) surface diffusion (for solutes only), (c) mass transfer between the mobile and immobile water fractions, (d) linear kinetic or equilibrium physical, chemical, or combined solute sorption or colloid filtration, and (e) radioactive decay or first order chemical reactions. Any number of radioactive decay daughter products (or products of a linear, first-order reaction chain) can be tracked. The tracer-transport equations in the fractures account for the same processes, in addition to advection and hydrodynamic dispersion. Additionally, the colloid transport equations account for straining and velocity adjustments related to the colloidal size. The solutions, which are analytical in the Laplace space, are numerically inverted to provide the solution in time and can accommodate any number of fractured and/or porous layers. The solutions are verified using analytical solutions for limiting cases of solute and colloid transport through fractured and porous media. The effect of important parameters on the transport of {sup 3}H, {sup 237}Np and {sup 239}Pu (and its daughters) is investigated in several test problems involving layered geological systems of varying complexity. {sup 239}Pu colloid transport problems in multilayered systems indicate significant colloid accumulations at straining interfaces but much faster transport of the colloid than the corresponding strongly sorbing solute species.

G.J. Moridis; G. S. Bodvarsson

2001-10-01T23:59:59.000Z

198

Tracer measurements during long-term circulation of the Rosemanowes HDR geothermal system  

SciTech Connect (OSTI)

Circulation experiments have been in operation for over two years in the artificially stimulated hot dry rock (HDR) doublet of the Camborne School of Mines (CSM) research facility in Cornwall, England. During that period tracer tests have been run at intervals using inert and reactive compounds. Initially, the results of the inert tracer investigations showed that the active volume (indicated by modal and median volumes) of the circulating system was dormant. Then, after a period of sustained oscillation, notable increases in active volume were observed which depended on both the subsequent flow rate changes and circulation time. these dynamic changes had almost reached optimum values when a downhole pump was introduced in the production well. The drawdown in the production well caused a reduction of the modal volume, whilst the median volume remained almost the same. Since then, the active volume has remained unchanged and irresponsive to circulation time and flow rate. The results of the reactive tracer tests confirm increasing chemical reaction with increasing circulation time and correlate qualitatively with the opening of newer and hotter pathways within the reservoir. However, repeated production logs throughout the circulation have identified flow paths that have depleted thermally; a discrepancy that can be explained by the geometry of the system and the preferential downward reservoir growth.

Kwakwa, K.A.

1988-01-01T23:59:59.000Z

199

Kinetic analysis of 18F-fluorodihydrorotenone as a deposited myocardial flow tracer: Comparison to thallium-201.  

SciTech Connect (OSTI)

The goal of this investigation was to assess the accuracy of 18F-fluorodihydrorotenone (18F-FDHR) as a new deposited myocardial flow tracer and compare the results to those for 201Tl. Methods. The kinetics of these flow tracers were evaluated in 22 isolated, erythrocyte- and albumin-perfused rabbit hearts over a flow range encountered in patients. The two flow tracers plus a vascular reference tracer (131I-albumin) were introduced as a bolus through a port just above the aortic cannula. Myocardial extraction, retention, washout, and uptake parameters were computed from the venous outflow curves using the multiple indicator dilution technique and spectral analysis. Results. The mean initial extraction fractions of 18F-FDHR (0.85 +- 0.07) and 201Tl (0.87 +- 0.05) were not significantly different, although the initial extraction fraction for 18F-FDHR declined with flow (P < 0.0001), whereas the initial extraction fraction of 201Tl did not. Washout of 201Tl was faster (P < 0.001) and more affected by flow (P < 0.05) than 18F-FDHR washout. Except for initial extraction fraction, 18F-FDHR retention was greater (P < 0.001) and less affected by flow (P < 0.05) than 201Tl retention. Reflecting its superior retention, net uptake of 18F-FDHR was better correlated with flow than 201Tl uptake at both one and fifteen minutes after tracer introduction (P < 0.0001 for both comparisons). Conclusion. The superior correlation of 18F-FDHR uptake with flow indicates that it is a better flow tracer than 201Tl in the isolated rabbit heart. Compared to the other currently available positron-emitting flow tracers (82Rb, 13N-ammonia, and 15O-water), 18F-FDHR has the potential of providing excellent image resolution without the need for an on-site cyclotron.

Marshall, Robert C.; Powers-Risius, Patricia; Reutter, Bryan W.; O'Neil, James P.; La Belle, Michael; Huesman, Ronald H.; VanBrocklin, Henry F.

2004-03-01T23:59:59.000Z

200

A new statistical dispersion model for tracer tests and contaminant spread in porous media  

SciTech Connect (OSTI)

Dispersion of solutes moving in permeable media is an essential control to describe fluid flow in permeable media. Dispersion can be thought of as a spreading of a solute caused by the presence of microscopic inhomogeneities. An accurate model for dispersion is needed for accurate estimation of oil recovery efficiencies and clean up costs of subsurface contaminants. Current approaches utilizing the fickian assumption fall short in describing the real physics of spreading during a solute transport process. Numerous field investigations have shown that dispersivities measured in the field are much larger than those measured in the lab for the same type of porous material. Moreover, field measured dispersivities have been shown to be scale dependent, that is, a tracer test conducted over a longer travel path will yield a larger dispersivity value than a tracer test conducted in the same geologic formation over a shorter travel path. Numerous approaches to address this problem have been developed yet none attempted to go beyond the Fickian dispersion assumption. In this study, a convective dispersivity is introduced. New model assumes that dispersion is dimensionless and mainly determined by pore size distribution. The new model results in a spread that increases linearly with time contrary to conventional model, which predicts a mixing zone length that increases with square root of time. Therefore, new model explains the field test results that indicate increasing dispersivity with distance. The model validations are in perfect agreement with experimental results, which include; Ganapathy et al.`s slug experiment on Antolini sandstone, Handy`s radioactive tracer experiment on Alhambra sandstone, and CT experiment conducted at BDM-OK/NIPER facilities on Tallant sandstone.

Ates, H.; Kasap, E. [Univ. of Tulsa, OK (United States)

1995-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Results of injection and tracer tests in Olkaria East Geothermal Field  

SciTech Connect (OSTI)

This paper presents results of a six month Injection and Tracer test done in Olkaria East Geothermal Field The Injection tests show that commencement of injection prior to onset of large drawdown in the reservoir leads to greater sustenance of well production and can reduce well cycling which is a common feature of wells in Olkaria East Field. For cases where injection is started after some drawdown has occurred in the reservoir, injection while leading to improvement of well output can also lead to increase in well cycling which is a non desirable side effect. Tracer tests reveal slow rate of fluid migration (< 5 m/hr). However estimates of the cumulative tracer returns over the period of injection is at least 31% which is large and reveals the danger of late time thermal drawdown and possible loss of production. It is shown in the discussion that the two sets of results are consistent with a reservoir where high permeability occurs along contact surfaces which act as horizontal "fractures" while the formations between the "fractures" have low permeability. This type of fracture system will lead to channeled flow of injected fluid and therefore greater thermal depletion along the fractures while formations further from the fracture would still be at higher temperature. In an attempt to try and achieve a more uniform thermal depletion in the reservoir, it is proposed that continuous injection be done for short periods (~2 years) and this be followed by recovery periods of the nearly the same length of time before resumption of injection again.

Ambusso, Willis J.

1994-01-20T23:59:59.000Z

202

Yeast Genomic DNA Prep Sterile distilled water  

E-Print Network [OSTI]

TE Protocol: 1. Grow 25 ml of yeast cells in YPD to 5x107 cells/ml. 2. Spin down cells in 50-ml: 1 M sorbitol, 0.1 M sodium citrate (pH 5.8), 0.01 M EDTA (pH 8.0) Saline-EDTA Buffer: 0.15 M NaCl, 0% incubate another 30 minutes). 10.Spin down spheroplasts for 3 minutes at 3,000 rpms and remove supernatant

Auble, David

203

WWF-Climate Prep | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov PtyInformationSEDS data Jump to: navigation,InformationWSP FLAKPrep Jump

204

LANSCE | Lujan Center | Chemical & Sample Prep  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformationPostdocs &Jeff Yarbroughdevelopment,Call for

205

Geoscience Prep Lab Slideshow | Sample Preparation Laboratories  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun with Big Sky Learning FunNeuTel2011 Venezia,Lab George NeilFall

206

Potential method for measurement of CO2 leakage from underground sequestration fields using radioactive tracers  

SciTech Connect (OSTI)

Reduction of anthropogenic carbon dioxide (CO2) release to the environment is a pressing challenge that should be addressed to avert the potential devastating effects of global warming. Within the United States, the most abundant sources of CO2 emissions are those generate from coal- or gas-fired power plants; one method to control CO2 emissions is to sequester it in deep underground geological formations. From integrated assessment models the overall leakage rates from these storage locations must be less than 0.1% of stored volume per year for long-term control. The ability to detect and characterize nascent leaks, in conjunction with subsequent remediation efforts, will significantly decrease the amount of CO2 released back into the environment. Because potential leakage pathways are not necessarily known a priori, onsite monitoring must be performed; the monitoring region in the vicinity of a CO2 injection well may be as large as 100 km2, which represents the estimated size of a supercritical CO2 bubble that would form under typical injection scenarios. By spiking the injected CO2 with a radiological or stable isotope tracer, it will be possible to detect ground leaks from the sequestered CO2 using fewer sampling stations, with greater accuracy than would be possible using simple CO2 sensors. The relative merits of various sorbent materials, radiological and stable isotope tracers, detection methods and potential interferences will be discussed.

Bachelor, Paula P.; McIntyre, Justin I.; Amonette, James E.; Hayes, James C.; Milbrath, Brian D.; Saripalli, Prasad

2008-07-01T23:59:59.000Z

207

The Lagrangian dynamics of thermal tracer particles in Navier-Stokes fluids  

E-Print Network [OSTI]

A basic issue for Navier-Stokes (NS) fluids is their characterization in terms of the so-called NS phase-space classical dynamical system, which provides a mathematical model for the description of the dynamics of infinitesimal (or i\\textit{deal}) tracer particles in these fluids. The goal of this paper is to analyze the properties of a particular subset of solutions of the NS dynamical system, denoted as \\textit{thermal tracer particles} (TTPs), whose states are determined uniquely by the NS fluid fields. Applications concerning both deterministic and stochastic NS fluids are pointed out. In particular, in both cases it is shown that in terms of the ensemble of TTPs a statistical description of NS fluids can be formulated. In the case of stochastic fluids this feature permits to uniquely establish the corresponding Langevin and Fokker-Planck dynamics. Finally, the relationship with the customary statistical treatment of hydrodynamic turbulence (HT) is analyzed and a solution to the closure problem for the statistical description of HT is proposed.

Massimo Tessarotto; Claudio Asci; Claudio Cremaschini; Alessandro Soranzo; Marco Tessarotto; Gino Tironi

2012-03-17T23:59:59.000Z

208

A Really Good Hammer: Quantification of Mass Transfer Using Perfluorocarbon Tracers (475th Brookhaven Lecture)  

SciTech Connect (OSTI)

Brookhaven Lab’s perfluorocarbon tracer (PFT) technology can be viewed as a hammer looking for nails. But, according to Tom Watson, leader of the Lab’s Tracer Technology Group in the Environmental Research and Technology Division (ERTD), “It’s a really good hammer!” The colorless, odorless and safe gases have a number of research uses, from modeling how airborne contaminants might move through urban canyons to help first responders plan their response to potential terrorist attacks and accidents to locating leaks in underground gas pipes. Their extremely low background level — detectable at one part per quadrillion — allows their transport to be easily tracked. Lab researchers used PFTs during the 2005 Urban Dispersion Program field studies in New York City, gathering data to help improve models of how a gas or chemical release might move around Manhattan’s tall buildings and canyons. Closer to home, scientists also used PFTs to make ventilation measurements in Bldg. 400 on the Lab site to provide data to test air flow models used in determining the effects of passive and active air exchange on the levels of indoor and outdoor air pollution, and to determine the effects of an accidental or intentional release of hazardous substances in or around buildings.

Watson, Tom [BNL Environmental Sciences, Tracer Technology Group

2012-02-15T23:59:59.000Z

209

REAL-TIME TRACER MONITORING OF RESERVOIR STIMULATION PROCEDURES VIA ELECTRONIC WIRELINE AND TELEMETRY DATA TRANSMISSION  

SciTech Connect (OSTI)

Finalized Phase 2-3 project work has field-proven two separate real-time reservoir processes that were co-developed via funding by the National Energy Technology Laboratory (NETL). Both technologies are presently patented in the United States and select foreign markets; a downhole-commingled reservoir stimulation procedure and a real-time tracer-logged fracturing diagnostic system. Phase 2 and early Phase 3 project work included the research, development and well testing of a U.S. patented gamma tracer fracturing diagnostic system. This stimulation logging process was successfully field-demonstrated; real-time tracer measurement of fracture height while fracturing was accomplished and proven technically possible. However, after the initial well tests, there were several licensing issues that developed between service providers that restricted and minimized Realtimezone's (RTZ) ability to field-test the real-time gamma diagnostic system as was originally outlined for this project. Said restrictions were encountered after when one major provider agreed to license their gamma logging tools to another. Both of these companies previously promised contributory support toward Realtimezone's DE-FC26-99FT40129 project work, however, actual support was less than desired when newly-licensed wireline gamma logging tools from one company were converted by the other from electric wireline into slickline, batter-powered ''memory'' tools for post-stimulation logging purposes. Unfortunately, the converted post-fracture measurement memory tools have no applications in experimentally monitoring real-time movement of tracers in the reservoir concurrent with the fracturing treatment. RTZ subsequently worked with other tracer gamma-logging tool companies for basic gamma logging services, but with lessened results due to lack of multiple-isotope detection capability. In addition to real-time logging system development and well testing, final Phase 2 and Phase 3 project work included the development of a real-time reservoir stimulation procedure, which was successfully field-demonstrated and is presently patented in the U.S. and select foreign countries, including Venezuela, Brazil and Canada. Said patents are co-owned by RTZ and the National Energy Technology Lab (NETL). In 2002, Realtimezone and the NETL licensed said patents to Halliburton Energy Services (HES). Additional licensing agreements (LA) are anticipated with other service industry companies in 2005. Final Phase 3 work has led to commercial applications of the real-time reservoir stimulation procedure. Four successfully downhole-mixed well tests were conducted with commercially expected production results. The most recent, fourth field test was a downhole-mixed stimulated well completed in June, 2004, which currently produces 11 BOPD with 90 barrels of water per day. Conducted Phase 2 and Phase 3 field-test work to date has resulted in the fine-tuning of a real-time enhanced stimulation system that will significantly increase future petroleum well recoveries in the United States and foreign petroleum fields, both onshore and offshore, and in vertical and horizontal wells.

George L. Scott III

2005-01-01T23:59:59.000Z

210

Addition of tracers into the polypropylene in view of automatic sorting of plastic wastes using X-ray fluorescence spectrometry  

SciTech Connect (OSTI)

This study focused on the detection of rare earth oxides, used as tracers for the identification of polymer materials, using XRF (X-ray fluorescence) spectrometry. The tests were carried out in a test system device which allows the collection of static measurements of the samples' spectrum through the use of energy dispersive X-ray fluorescence technology. A sorting process based on tracers added into the polymer matrix is proposed in order to increase sorting selectivity of polypropylene during end-of-life recycling. Tracers consist of systems formed by one or by several substances dispersed into a material, to add a selective property to it, with the aim of improving the efficiency of sorting and high speed identification. Several samples containing rare earth oxides (Y{sub 2}O{sub 3}, CeO{sub 2}, Nd{sub 2}O{sub 3}, Gd{sub 2}O{sub 3}, Dy{sub 2}O{sub 3}, Er{sub 2}O{sub 3} and Yb{sub 2}O{sub 3}) in different concentrations were prepared in order to analyse some of the parameters which can influence the detection, such as the concentration of tracers, the acquisition time and the possible overlapping among the tracers. This work shows that by using the XRF test system device, it was possible to detect 5 of the 7 tracers tested for 1 min exposure time and at a concentration level of 1000 ppm. These two parameters will play an important role in the development of an industrial device, which indicates the necessity of further works that needs to be conducted in order to reduce them.

Bezati, F., E-mail: feliks.bezati@ensam.e [MAPIE-Laboratoire de Modelisation, Analyse et Prevention des Impacts Environnementaux, Institut ENSAM Savoie Technolac, 4 Rue du Lac Majeur, F-73375 Le Bourget du Lac Cedex (France); IMP/LMM-Ingenierie des Materiaux Polymeres - Laboratoire des Materiaux Macromoleculaires UMR 5223, INSA de Lyon Bat. Jules VERNE, 17, rue Jean Capelle F-69621 Villeurbanne Cedex (France); Froelich, D. [MAPIE-Laboratoire de Modelisation, Analyse et Prevention des Impacts Environnementaux, Institut ENSAM Savoie Technolac, 4 Rue du Lac Majeur, F-73375 Le Bourget du Lac Cedex (France); Massardier, V. [IMP/LMM-Ingenierie des Materiaux Polymeres - Laboratoire des Materiaux Macromoleculaires UMR 5223, INSA de Lyon Bat. Jules VERNE, 17, rue Jean Capelle F-69621 Villeurbanne Cedex (France); Maris, E. [MAPIE-Laboratoire de Modelisation, Analyse et Prevention des Impacts Environnementaux, Institut ENSAM Savoie Technolac, 4 Rue du Lac Majeur, F-73375 Le Bourget du Lac Cedex (France)

2010-04-15T23:59:59.000Z

211

Geochemical fluid characteristics and main achievements about tracer tests at Soultz-sous-Forts (France) 1 EC Contract SES6-CT-2003-502706  

E-Print Network [OSTI]

Geochemical fluid characteristics and main achievements about tracer tests at Soultz Related with Work Package WP1a (Short term fluid circulation tests) and WP1c (Data acquisition) GEOCHEMICAL FLUID CHARACTERISTICS AND MAIN ACHIEVEMENTS ABOUT TRACER TESTS AT SOULTZ-SOUS-FORÃ?TS (FRANCE

Boyer, Edmond

212

QUANTIFICATION OF FUGITIVE REACTIVE ALKENE EMISSIONS FROM PETROCHEMICAL PLANTS WITH PERFLUOROCARBON TRACERS.  

SciTech Connect (OSTI)

Recent studies demonstrate the impact of fugitive emissions of reactive alkenes on the atmospheric chemistry of the Houston Texas metropolitan area (1). Petrochemical plants located in and around the Houston area emit atmospheric alkenes, such as ethene, propene and 1,3-butadiene. The magnitude of emissions is a major uncertainty in assessing their effects. Even though the petrochemical industry reports that fugitive emissions of alkenes have been reduced to less than 0.1% of daily production, recent measurement data, obtained during the TexAQS 2000 experiment indicates that emissions are perhaps a factor of ten larger than estimated values. Industry figures for fugitive emissions are based on adding up estimated emission factors for every component in the plant to give a total estimated emission from the entire facility. The dramatic difference between estimated and measured rates indicates either that calculating emission fluxes by summing estimates for individual components is seriously flawed, possibly due to individual components leaking well beyond their estimated tolerances, that not all sources of emissions for a facility are being considered in emissions estimates, or that there are known sources of emissions that are not being reported. This experiment was designed to confirm estimates of reactive alkene emissions derived from analysis of the TexAQS 2000 data by releasing perfluorocarbon tracers (PFTs) at a known flux from a petrochemical plant and sampling both the perfluorocarbon tracer and reactive alkenes downwind using the Piper-Aztec research aircraft operated by Baylor University. PFTs have been extensively used to determine leaks in pipelines, air infiltration in buildings, and to characterize the transport and dispersion of air parcels in the atmosphere. Over 20 years of development by the Tracer Technology Center (TTC) has produced a range of analysis instruments, field samplers and PFT release equipment that have been successfully deployed in a large variety of experiments. PFTs are inert, nontoxic, noncombustible and nonreactive. Up to seven unique PFTs can be simultaneously released, sampled and analyzed and the technology is well suited for determining emission fluxes from large petrochemical facilities. The PFT experiment described here was designed to quantitate alkene emissions from a single petrochemical facility, but such experiments could be applied to other industrial sources or groups of sources in the Houston area.

SENUM,G.I.; DIETZ,R.N.

2004-06-30T23:59:59.000Z

213

Mixing properties in the advection of passive tracers via recurrences and extreme value theory  

E-Print Network [OSTI]

In this paper we characterize the mixing properties in the advection of passive tracers by exploiting the extreme value theory for dynamical systems. With respect to classical techniques directly related to the Poincar\\'e recurrences analysis, our method provides reliable estimations of the characteristic mixing times and distinguishes between barriers and unstable fixed points. The method is based on a check of convergence for extreme value laws on finite datasets. We define the mixing times in terms of the shortest time intervals such that extremes converge to the asymptotic (known) parameters of the Generalized Extreme Value distribution. Our technique is suitable for applications in the analysis of other systems where mixing time scales need to be determined and limited datasets are available.

Davide Faranda; Xavier Leoncini; Sandro Vaienti

2014-02-16T23:59:59.000Z

214

Using conversions of chemically reacting tracers for numerical determination of temperature profiles in flowing systems and temperature histories in batch systems  

SciTech Connect (OSTI)

This report presents the mathematical bases for measuring internal temperatures within batch and flowing systems using chemically reacting tracers. This approach can obtain temperature profiles of plug-flow systems and temperature histories within batch systems. The differential equations for reactant conversion can be converted into Fredholm integral equations of the first kind. The experimental variable is the tracer-reaction activation energy. When more than one tracer is used, the reactions must have different activation energies to gain information. In systems with temperature extrema, multiple solutions for the temperature profiles or histories can exist, When a single parameter in the temperature distribution is needed, a single-tracer test may furnish this information. For multi-reaction tracer tests, three Fredholm equations are developed. Effects of tracer-reaction activation energy, number of tracers used, and error in the data are evaluated. The methods can determine temperature histories and profiles for many existing systems, and can be a basis for analysis of the more complicated dispersed-flow systems. An alternative to using the Fredholm-equation approach is the use of an assumed temperature- distribution function and incorporation of this function into the basic integral equation describing tracer behavior. The function contains adjustable parameters which are optimized to give the temperature distribution. The iterative Fredholm equation method is tested to see what is required to discriminate between two models of the temperature behavior of Hot Dry Rock (HDR) geothermal reservoirs. Experimentally, ester and amide hydrolyses are valid HDR tracer reactions for measuring temperatures in the range 75-100{degrees}C. Hydrolyses of bromobenzene derivatives are valid HDR tracer reactions for measuring temperatures in the range 150-275{degrees}C.

Brown, L.F.; Chemburkar, R.M.; Robinson, B.A.; Travis, B.J.

1996-04-01T23:59:59.000Z

215

AN INTEGRATED APPROACH TO CHARACTERIZING BYPASSED OIL IN HETEROGENEOUS AND FRACTURED RESERVOIRS USING PARTITIONING TRACERS  

SciTech Connect (OSTI)

We explore the use of efficient streamline-based simulation approaches for modeling and analysis partitioning interwell tracer tests in heterogeneous and fractured hydrocarbon reservoirs. The streamline approach is generalized to model water injection in naturally fractured reservoirs through the use of a dual media approach. The fractures and matrix are treated as separate continua that are connected through a transfer function, as in conventional finite difference simulators for modeling fractured systems. A detailed comparison with a commercial finite difference simulator shows very good agreement. Furthermore, an examination of the scaling behavior of the computation time indicates that the streamline approach is likely to result in significant savings for large-scale field applications. We also propose a novel approach to history matching finite-difference models that combines the advantage of the streamline models with the versatility of finite-difference simulation. In our approach, we utilize the streamline-derived sensitivities to facilitate history matching during finite-difference simulation. The use of finite-difference model allows us to account for detailed process physics and compressibility effects. The approach is very fast and avoids much of the subjective judgments and time-consuming trial-and-errors associated with manual history matching. We demonstrate the power and utility of our approach using a synthetic example and two field examples. Finally, we discuss several alternative ways of using partitioning interwell tracer tests (PITTs) in oil fields for the calculation of oil saturation, swept pore volume and sweep efficiency, and assess the accuracy of such tests under a variety of reservoir conditions.

Akhil Datta-Gupta

2004-08-01T23:59:59.000Z

216

{sup 41}Ca as a tracer for calcium uptake and deposition in heart tissue during ischemia and reperfusion  

SciTech Connect (OSTI)

We have developed techniques and are commencing experiments using enriched {sup 41}Ca as a tracer in isolated rabbit heart preparations. The aims of the study are to measure calcium uptake and deposition in response to cardiac ischemia and reperfusion, and to investigate events and mechanism leading to irreversible myocyte injury.

Southon, J.R. [Lawrence Livermore National Lab., CA (United States); Bishop, M.S.; Kost, G.J. [California Univ., Davis, CA (United States). Dept. of Medical Pathology and Biomedical Engineering

1993-09-17T23:59:59.000Z

217

Self-consistent magnetic properties of magnetite tracers optimized for magnetic particle imaging measured by ac susceptometry,  

E-Print Network [OSTI]

Self-consistent magnetic properties of magnetite tracers optimized for magnetic particle imaging measured by ac susceptometry, magnetorelaxometry and magnetic particle spectroscopy Frank Ludwig a , Hilke. Krishnan b,n a Institute of Electrical Measurement and Fundamental Electrical Engineering, TU Braunschweig

Krishnan, Kannan M.

218

Thorium isotopes as tracers of particles dynamics and deep water circulation in the Indian sector of the  

E-Print Network [OSTI]

Thorium isotopes as tracers of particles dynamics and deep water circulation in the Indian sector to study the distribution of thorium isotopes (234 Th, 232 Th and 230 Th) in the water column of the Indian in surface water (0­100 m) and a model was applied to estimate a residence time relative to the thorium

Coppola, Laurent

219

Effects from influent boundary conditions on tracer migration and spatial variability features in intermediate-scale experiments  

SciTech Connect (OSTI)

In previous unsaturated transport studies at Los Alamos dispersion coefficients were estimated to be higher close to the tracer source than at greater distances from the source. Injection of tracers through discrete influent outlets could have accounted for those higher dispersions. Also, a lack of conservation of mass of the tracers was observed and suspected to be due to spatial variability in transport. In the present study experiments were performed under uniform influent (ponded) conditions in which breakthrough of tracers was monitored at four locations at each of four depths. All other conditions were similar to those of the unsaturated transport experiments. A comparison of results from these two sets of experiments indicates differences in the parameter estimates. Estimates were made for the dispersion coefficient and the retardation factor by the one-dimensional steady flow computer code, CFITIM. Estimates were also made for mass and for velocity and the dispersion coefficient by the method of moments. The dispersion coefficient decreased with depth under discrete influent application and increased with depth under ponded influent application. Retardation was predicted better under the discrete influent application than under ponded influent application. Differences in breakthroughs and in estimated parameters among locations at the same depth were observed under ponded influent application. Those differences indicate that there is a lack of conservation of mass as well as significant spatial variability across the experimental domain. 14 refs., 9 figs., 8 tabs.

Fuentes, H.R.; Polzer, W.L.; Springer, E.P.

1987-04-01T23:59:59.000Z

220

Isotopic Tracer Studies of Propane Reactions on H-ZSM5 Zeolite Joseph A. Biscardi and Enrique Iglesia*  

E-Print Network [OSTI]

Isotopic Tracer Studies of Propane Reactions on H-ZSM5 Zeolite Joseph A. Biscardi and Enrique unlabeled products from mixtures of propene and propane-2-13C reactants. Aromatic products of propane-2-13C-Parmer) that allowed differential reactor operation (propane reactions were

Iglesia, Enrique

Note: This page contains sample records for the topic "tracer prep blanks" 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

Measurement of HVAC system performance and local ventilation using passive perfluorocarbon tracer technology  

SciTech Connect (OSTI)

In April of 1993, two (2) perfluorocarbon tracer (PFT) ventilation/indoor air quality assessment tests were performed in the Gleeson Hall building of the SUNY Farmingdale campus. The building was being modified, in part, as a result of significant occupant complaints of perceived poor air quality. The four story building had a basement first floor with air supplied normally by an HVAC system labelled as AC1. During this study, AC1 was inoperational and the basement interior rooms (walls) were primarily gone; the other three floors were still being used for classes. It is possible that a sense of poor air quality may have been perceived by first-floor occupants because they were working in the basement, but this issue could not be addressed. The second floor had two (2) lecture halls--Rm 202 (handled by AC4) and Rm 204 (handled by AC5); the balance of the second floor interior rooms and corridors was split between two other air handling systems, AC2 for the west side of the building and AC3 for the east side. The remaining 3rd and 4th floors were also split about evenly between AC2 and AC3. The perimeter rooms, equipped with wall units having their own outside air (OA) source plus centralized return air (RA) bypasses, were not included in this testing which was restricted to the basement floor (1st floor) and the four operating air handling systems, AC2 to AC5, during Test 1 and only AC2 to AC5 during Test 2. Two types of tests were performed using the full suite of 5 PFT types available. The first test was designed to measure the infiltration, exfiltration, and air exchange between the 5 AC zones above and the second test used the 5th tracer, which had been in the basement, as a distributed source throughout the four other zones to act as a surrogate pollutant source. This report provides final conclusions of both tests and suggestions regarding its usefulness in similar building ventilation and indoor air quality assessments.

Dietz, R.N.; Goodrich, R.W.

1995-06-01T23:59:59.000Z

222

Bureau of Land Management - Examples of Non-LUP Prep Plan or EIS Prep Plan  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCTBarre BiomassTHISBrickyardRepowerBull Creek WindBurcoEnergy| Open

223

Monitoring of saline tracer movement with vertically distributed self-potential measurements at the HOBE agricultural test site, Voulund, Denmark  

E-Print Network [OSTI]

The self-potential (SP) method is sensitive to water fluxes in saturated and partially saturated porous media, such as those associated with rainwater infiltration and groundwater recharge. We present a field-based study at the Voulund agricultural test site, Denmark, that is, to the best of our knowledge, the first to focus on the vertical self-potential distribution prior to and during a saline tracer test. A coupled hydrogeophysical modeling framework is used to simulate the SP response to precipitation and saline tracer infiltration. A layered hydrological model is first obtained by inverting dielectric and matric potential data. The resulting model that compares favorably with electrical resistance tomography models is subsequently used to predict the SP response. The electrokinetic contribution (caused by water fluxes in a charged porous soil) is modeled by an effective excess charge approach that considers both water saturation and pore water salinity. Our results suggest that the effective excess char...

Jougnot, Damien; Haarder, Eline B; Looms, Majken C

2015-01-01T23:59:59.000Z

224

Preliminary Interpretation of a Radionuclide and Colloid Tracer Test in a Granodiorite Shear Zone at the Grimsel Test Site, Switzerland  

SciTech Connect (OSTI)

In February and March 2012, a tracer test involving the injection of a radionuclide-colloid cocktail was conducted in the MI shear zone at the Grimsel Test Site, Switzerland, as part of the Colloids Formation and Migration (CFM) project. The colloids were derived from FEBEX bentonite, which is mined in Spain and is being considered as a potential waste package backfill in a Spanish nuclear waste repository. The tracer test, designated test 12-02 (second test in 2012), involved the injection of the tracer cocktail into borehole CFM 06.002i2 and extraction from the Pinkel surface packer at the main access tunnel wall approximately 6.1 m from the injection interval. The test configuration is depicted in Figure 1. This configuration has been used in several conservative tracer tests and two colloid-homologue tracer tests since 2007, and it is will be employed in an upcoming test involving the emplacement of a radionuclide-doped bentonite plug into CFM 06.002i2 to evaluate the swelling and erosion of the bentonite and the transport of bentonite colloids and radionuclides from the source to the extraction point at the tunnel wall. Interpretive analyses of several of the previous tracer tests, from 09-01 through 12-02 were provided in two previous Used Fuel Disposition Program milestone reports (Arnold et al., 2011; Kersting et al., 2012). However, only the data for the conservative tracer Amino-G Acid was previously analyzed from test 12-02 because the other tracer data from this test were not available at the time. This report documents the first attempt to quantitatively analyze the radionuclide and colloid breakthrough curves from CFM test 12-02. This report was originally intended to also include an experimental assessment of colloid-facilitated transport of uranium by bentonite colloids in the Grimsel system, but this assessment was not conducted because it was reported by German collaborators at the Karlsruhe Institute of Technology (KIT) that neither uranium nor neptunium adsorbed appreciably to FEBEX bentonite colloids in Grimsel groundwater (Huber et al., 2011). The Grimsel groundwater has a relatively high pH of {approx}9, so the lack of uranium and neptunium adsorption to clay is not surprising given the tendency for these actinides to form very stable negative or neutrally-charged uranyl- or calcium-uranyl-carbonate complexes at these pH, particularly in a water that is effectively saturated with respect to calcite. It was also observed in testing conducted at LANL earlier in 2012 that uranium did not adsorb measurably to Grimsel granodiorite in a synthetic Grimsel groundwater at pH {approx}8.5 (Kersting et al., 2012). Thus, the planned experimental work was not pursued because all the available information clearly pointed to an expected result that uranium transport would not be facilitated by clay colloids in the Grimsel system.

Reimus, Paul W. [Los Alamos National Laboratory

2012-08-30T23:59:59.000Z

225

Transport of tracers and pollutants from the Geysers Geothermal Resource Area  

SciTech Connect (OSTI)

An initial analysis of both surface and aerial SF/sub 6/ tracer data from the Geysers illustrates the importance that terrain, vertical wind shear, time-varying winds and stability have on the downwind distribution of cooling tower effluents during the daytime. Atmospheric stability and near surface winds above 3 m/s results in fumigation and surface impaction of a portion of cooling tower plumes on downwind surfaces and terrain. Vertical wind shear and possible gravity waves in upper-levels (approx. 1800 to 2000 m m.s.l), in addition, to terrain influences assist in distributing plumes horizontally and in the vertical at relative short (approx. 10 to 20 km) distances from the source. Small quantities of gaseous sulfur, primarily H/sub 2/S, are transported up to 20 km or more from the Geysers area. A variety of trace materials such as sulfate, copper, zinc, arsenic, bromine, lead, antimony, selenium and barium appear to be enriched over background levels and transported downwind from the Geysers Area at times.

Orgill, M.M.; Lee, R.N.; Schreck, R.I.

1983-08-01T23:59:59.000Z

226

Reservoir characterization based on tracer response and rank analysis of production and injection rates  

SciTech Connect (OSTI)

Quantification of the spatial distribution of properties is important for many reservoir-engineering applications. But, before applying any reservoir-characterization technique, the type of problem to be tackled and the information available should be analyzed. This is important because difficulties arise in reservoirs where production records are the only information for analysis. This paper presents the results of a practical technique to determine preferential flow trends in a reservoir. The technique is a combination of reservoir geology, tracer data, and Spearman rank correlation coefficient analysis. The Spearman analysis, in particular, will prove to be important because it appears to be insightful and uses injection/production data that are prevalent in circumstances where other data are nonexistent. The technique is applied to the North Buck Draw field, Campbell County, Wyoming. This work provides guidelines to assess information about reservoir continuity in interwell regions from widely available measurements of production and injection rates at existing wells. The information gained from the application of this technique can contribute to both the daily reservoir management and the future design, control, and interpretation of subsequent projects in the reservoir, without the need for additional data.

Refunjol, B.T. [Lagoven, S.A., Pdvsa (Venezuela); Lake, L.W. [Univ. of Texas, Austin, TX (United States)

1997-08-01T23:59:59.000Z

227

A New Multi-wavelength Solar Telescope: Optical and Near-infrared Solar Eruption Tracer (ONSET)  

E-Print Network [OSTI]

A new multi-wavelength solar telescope, Optical and Near-infrared Solar Eruption Tracer (ONSET) of Nanjing University, was constructed, being fabricated by Nanjing Institute of Astronomical Optics & Technology and run in cooperation with Yunnan Astronomical Observatory. ONSET is able to observe the Sun in three wavelength windows: He {\\small I} 10830 \\AA, H$\\alpha$, and white-light at 3600 \\AA and 4250 \\AA, which are selected in order to obtain the dynamics in the corona, chromosphere, and the photosphere simultaneously. Full-disk or partial-disk solar images with a field of 10 arcmin at three wavelengths can be obtained nearly simultaneously. It is designed to trace solar eruptions with high spatial and temporal resolutions. This telescope was installed at a new solar observing site near Fuxian Lake in Yunnan Province, southwest China. The site is located at E102N24, with an altitude of 1722 m. The seeing is stable and of high quality. We give a brief description of the scientific objectives and the basi...

Fang, C; Li, Z; Ding, M D; Dai, Y; Zhang, X Y; Mao, W J; Zhang, J P; Li, T; Liang, Y J; Lu, H T

2013-01-01T23:59:59.000Z

228

This page intentionally blank. ON THE COVER  

E-Print Network [OSTI]

HIGHLIGHTS CONDENSED MATTER 8 Structural collapse and high-temperature superconductivity in iron-pnictide Ca and mechanical damage in gas pipelines, T. Gnäupel-Herold, et al. 26 Nano-void volume linked to sensitivity activation analysis, I.J. Kim, et al. 49 Directly probing anisotropy gradients using polarized

229

Aluminum Formability Extension through Superior Blank Processing  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

230

Chapter 14 This Space Intentionally Left Blank  

E-Print Network [OSTI]

, or set up a `feminist philosophy' sub-industry at the risk of diverting their graduate students outside philosophy will naturally think of a dilemma as in some way a bad thing. If politics is one activists take up their positions. In philosophy, it is the opposite. There is nothing that feeds philosophy

Franklin, James

231

Widget:TargetBlank | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 South Place:ReferenceEdit Jump to: navigation, search

232

Wear Measurement of Highly Cross-linked UHMWPE using a 7Be Tracer Implantation Technique  

SciTech Connect (OSTI)

The very low wear rates achieved with the current highly cross-linked ultrahigh molecular weight polyethylenes (UHMWPE) used in joint prostheses have proven to be difficult to measure accurately by gravimetry. Tracer methods are there- fore being explored. The purpose of this study was to perform a proof-of-concept experiment on the use of the radioactive tracer beryllium-7 (7Be) for the determination of in vitro wear in a highly cross-linked orthopedic UHMWPE. Three cross-linked and four conventional UHMWPE pins made from compression- molded GUR 1050, were activated with 109 to 1010 7Be nuclei using a new implantation setup that produced a homogenous distribution of implanted nuclei up to 8.5 lm below the surface. The pins were tested for wear in a six-station pin-on-flat appara- tus for up to 7.1 million cycles (178 km). A Germanium gamma detector was employed to determine activity loss of the UHMWPE pins at preset intervals during the wear test. The wear of the cross-linked UHMWPE pins was readily detected and esti- mated to be 17 6 3 lg per million cycles. The conventional-to- cross-linked ratio of the wear rates was 13.1 6 0.8, in the expected range for these materials. Oxidative degradation dam- age from implantation was negligible; however, a weak depend- ence of wear on implantation dose was observed limiting the number of radioactive tracer atoms that can be introduced. Future applications of this tracer technology may include the analysis of location-specific wear, such as loss of material in the post or backside of a tibial insert.

Wimmer, Markus A. [Rush Uniiv. Medical Center; Laurent, Michael P. [Rush Univ. Medical Center; Dwivedi, Yasha [Rush Univ. Medical Center; Gallardo, Luis A. [Rush Univ. Medical Center; Chipps, K. [Colorado School of Mines, Golden; Blackmon, Jeffery C [Louisiana State University; Kozub, R. L. [Tennessee Technological University; Bardayan, Daniel W [ORNL; Gross, Carl J [ORNL; Stracener, Daniel W [ORNL; Smith, Michael Scott [ORNL; Nesaraja, Caroline D [ORNL; Erikson, Luke [Colorado School of Mines, Golden; Patel, Nidhi [Colorado School of Mines, Golden; Rehm, Karl E. [Argonne National Laboratory (ANL); Ahmad, Irshad [Argonne National Laboratory (ANL); Greene, John P. [Argonne National Laboratory (ANL); Greife, Uwe [Colorado School of Mines, Golden

2013-01-01T23:59:59.000Z

233

Interpretation of Colloid-Homologue Tracer Test 10-03, Including Comparisons to Test 10-01  

SciTech Connect (OSTI)

This presentation covers the interpretations of colloid-homologue tracer test 10-03 conducted at the Grimsel Test Site, Switzerland, in 2010. It also provides a comparison of the interpreted test results with those of tracer test 10-01, which was conducted in the same fracture flow system and using the same tracers than test 10-03, but at a higher extraction flow rate. A method of correcting for apparent uranine degradation in test 10-03 is presented. Conclusions are: (1) Uranine degradation occurred in test 10-03, but not in 10-01; (2) Uranine correction based on apparent degradation rate in injection loop in test 11-02 seems reasonable when applied to data from test 10-03; (3) Colloid breakthrough curves quite similar in the two tests with similar recoveries relative to uranine (after correction); and (4) Much slower apparent desorption of homologues in test 10-03 than in 10-01 (any effect of residual homologues from test 10-01 in test 10-03?).

Reimus, Paul W. [Los Alamos National Laboratory

2012-06-26T23:59:59.000Z

234

Thermal single-well injection-withdrawal tracer tests for determining fracture-matrix heat transfer area  

SciTech Connect (OSTI)

Single-well injection-withdrawal (SWIW) tracer tests involve injection of traced fluid and subsequent tracer recovery from the same well, usually with some quiescent time between the injection and withdrawal periods. SWIW are insensitive to variations in advective processes that arise from formation heterogeneities, because upon withdrawal, fluid parcels tend to retrace the paths taken during injection. However, SWIW are sensitive to diffusive processes, such as diffusive exchange of conservative or reactive solutes between fractures and rock matrix. This paper focuses on SWIW tests in which temperature itself is used as a tracer. Numerical simulations demonstrate the sensitivity of temperature returns to fracture-matrix interaction. We consider thermal SWIW response to the two primary reservoir improvements targeted with stimulation, (1) making additional fractures accessible to injected fluids, and (2) increasing the aperture and permeability of pre-existing fractures. It is found that temperature returns in SWIW tests are insensitive to (2), while providing a strong signal of more rapid temperature recovery during the withdrawal phase for (1).

Pruess, K.; Doughty, C.

2010-01-15T23:59:59.000Z

235

Modeling The GRB Host Galaxy Mass Distribution: Are GRBs Unbiased Tracers of Star Formation?  

SciTech Connect (OSTI)

We model the mass distribution of long gamma-ray burst (GRB) host galaxies given recent results suggesting that GRBs occur in low metallicity environments. By utilizing measurements of the redshift evolution of the mass-metallicity (M-Z) relationship for galaxies, along with a sharp host metallicity cut-off suggested by Modjaz and collaborators, we estimate an upper limit on the stellar mass of a galaxy that can efficiently produce a GRB as a function of redshift. By employing consistent abundance indicators, we find that sub-solar metallicity cut-offs effectively limit GRBs to low stellar mass spirals and dwarf galaxies at low redshift. At higher redshifts, as the average metallicity of galaxies in the Universe falls, the mass range of galaxies capable of hosting a GRB broadens, with an upper bound approaching the mass of even the largest spiral galaxies. We compare these predicted limits to the growing number of published GRB host masses and find that extremely low metallicity cut-offs of 0.1 to 0.5 Z{sub {circle_dot}} are effectively ruled out by a large number of intermediate mass galaxies at low redshift. A mass function that includes a smooth decrease in the efficiency of producing GRBs in galaxies of metallicity above 12+log(O/H){sub KK04} = 8.7 can, however, accommodate a majority of the measured host galaxy masses. We find that at z {approx} 1, the peak in the observed GRB host mass distribution is inconsistent with the expected peak in the mass of galaxies harboring most of the star formation. This suggests that GRBs are metallicity biased tracers of star formation at low and intermediate redshifts, although our model predicts that this bias should disappear at higher redshifts due to the evolving metallicity content of the universe.

Kocevski, Daniel; /KIPAC, Menlo Park; West, Andrew A.; /UC, Berkeley, Astron. Dept. /MIT, MKI; Modjaz, Maryam; /UC, Berkeley, Astron. Dept.

2009-08-03T23:59:59.000Z

236

Effect of Cr2O3 on the 18O Tracer Incorporation in SOFC Materials  

SciTech Connect (OSTI)

Investigations of the impact of Cr{sub 2}O{sub 3} overlayers on the oxygen self diffusion in two SOFC materials were conducted to gain insight into the Cr poisoning mechanism at the cathode side of solid oxide fuel cells (SOFCs) with stainless steel interconnects. High density Y{sub 0.15}Zr{sub 0.85}O{sub 2} (YSZ) and La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3} (LSCF) sintered pellets were covered with 3 to 30 nm Cr overlayers that were subsequently oxidized, forming Cr{sub 2}O{sub 3}. Standard {sup 18}O tracer diffusion experiments at 800 C were performed and ToF-SIMS profiling revealed that the oxygen ion diffusion coefficients were unaffected by the thin Cr{sub 2}O{sub 3} overlayers, which is predictable since they are a bulk property, but the extracted effective surface exchange coefficients varied with Cr{sub 2}O{sub 3} overlayer thickness. Solid-state reaction measurements and electronic structure considerations concerning the surface exchange, led to the conclusion that the observed oxygen uptake hindrance for Cr{sub 2}O{sub 3} capped LSCF and the slight increase of the surface exchange coefficient for Cr{sub 2}O{sub 3} capped YSZ can be attributed to the electronic properties of Cr{sub 2}O{sub 3}. A critical thickness for Cr{sub 2}O{sub 3} was determined to be 12 nm where the transition from decreasing cathode-performance to a Cr{sub 2}O{sub 3}-property-governed regime occurs.

Finsterbusch, M.; Lussier, A; Negusse, E; Zhu, Z; Smith, R; Schaefer, J; Idzerda, Y

2010-01-01T23:59:59.000Z

237

Measurement of the Tracer Gradient and Sampling System Bias of the Hot Fuel Examination Facility Stack Air Monitoring System  

SciTech Connect (OSTI)

This report describes tracer gas uniformity and bias measurements made in the exhaust air discharge of the Hot Fuel Examination Facility at Idaho National Laboratory. The measurements were a follow-up on earlier measurements which indicated a lack of mixing of the two ventilation streams being discharged via a common stack. The lack of mixing is detrimental to the accuracy of air emission measurements. The lack of mixing was confirmed in these new measurements. The air sampling probe was found to be out of alignment and that was corrected. The suspected sampling bias in the air sample stream was disproved.

Glissmeyer, John A.; Flaherty, Julia E.

2011-07-20T23:59:59.000Z

238

Core follow calculation with the nTRACER numerical reactor and verification using power reactor measurement data  

SciTech Connect (OSTI)

The nTRACER direct whole core transport code employing the planar MOC solution based 3-D calculation method, the subgroup method for resonance treatment, the Krylov matrix exponential method for depletion, and a subchannel thermal/hydraulic calculation solver was developed for practical high-fidelity simulation of power reactors. Its accuracy and performance is verified by comparing with the measurement data obtained for three pressurized water reactor cores. It is demonstrated that accurate and detailed multi-physic simulation of power reactors is practically realizable without any prior calculations or adjustments. (authors)

Jung, Y. S.; Joo, H. G. [Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul (Korea, Republic of); Yoon, J. I. [KEPCO Nuclear Fuel, 1047 Daedukdae-ro, Yuseong-gu, Daejeon (Korea, Republic of)

2013-07-01T23:59:59.000Z

239

Exotic populations in Globular Clusters: Blue Stragglers as tracers of the internal dynamical evolution of stellar systems  

E-Print Network [OSTI]

In this paper I present an overview of the main observational properties of a special class of exotic objects (the so-called Blue Straggler Stars, BSSs) in Galactic Globular Clusters (GCs). The BSS specific frequency and their radial distribution are discussed in the framework of using this stellar population as probe of GC internal dynamics. In particular, the shape of the BSS radial distribution has been found to be a powerful tracer of the dynamical evolution of stellar systems, thus allowing the definition of an empirical "clock" able to measure the dynamical age of stellar aggregates from pure observational properties.

Ferraro, Francesco R

2015-01-01T23:59:59.000Z

240

Tracer Detection by Laser Spectroscopy for Applications in the Oil and Gas R. Nava, Texas A&M University, H. Schuessler, M. Fahes and H. Nasrabadi, Texas A&M University at Qatar, and  

E-Print Network [OSTI]

SPE 124689 Tracer Detection by Laser Spectroscopy for Applications in the Oil and Gas Industry R and more accurate option for applications in the oil and gas industry. The research work is currently being applications in the oil and gas industry. Chemical or radioactive tracers are used to label fluids from

Schuessler, Hans

Note: This page contains sample records for the topic "tracer prep blanks" 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

Strontium isotope geochemistry of alluvial groundwater: a tracer for groundwater resources characterisation Hydrology and Earth System Sciences, 8(5), 959972 (2004) EGU  

E-Print Network [OSTI]

Strontium isotope geochemistry of alluvial groundwater: a tracer for groundwater resources characterisation 959 Hydrology and Earth System Sciences, 8(5), 959972 (2004) © EGU Strontium isotope geochemistry for corresponding author : p.negrel@brgm.fr Abstract This study presents strontium isotope and major ion data

Paris-Sud XI, Université de

242

Project EARTH-13-GMH2: U-series nuclides as tracers of modern ocean processes Supervisors: Prof. Gideon Henderson and Dr. Alex Thomas  

E-Print Network [OSTI]

flow of Atlantic deep water during the Last Glacial Maximum', Nature. Vol. 468, pp. 84 #12;Project EARTH-13-GMH2: U-series nuclides as tracers of modern ocean processes Supervisors: Prof provides information about the removal rate of material from the water-column and, for the former, about

Henderson, Gideon

243

Modeling of CBM production, CO{sub 2} injection, and tracer movement at a field CO{sub 2} sequestration site  

SciTech Connect (OSTI)

Sequestration of carbon dioxide in unmineable coal seams is a potential technology mainly because of the potential for simultaneous enhanced coalbed methane production (ECBM). Several pilot tests have been performed around the globe leading to mixed results. Numerous modeling efforts have been carried out successfully to model methane production and carbon dioxide (CO{sub 2}) injection. Sensitivity analyses and history matching along with several optimization tools were used to estimate reservoir properties and to investigate reservoir performance. Geological and geophysical techniques have also been used to characterize field sequestration sites and to inspect reservoir heterogeneity. The fate and movement of injected CO{sub 2} can be determined by using several monitoring techniques. Monitoring of perfluorocarbon (PFC) tracers is one of these monitoring technologies. As a part of this monitoring technique, a small fraction of a traceable fluid is added to the injection wellhead along with the CO{sub 2} stream at different times to monitor the timing and location of the breakthrough in nearby monitoring wells or offset production wells. A reservoir modeling study was performed to simulate a pilot sequestration site located in the San Juan coal basin of northern New Mexico. Several unknown reservoir properties at the field site were estimated by modeling the coal seam as a dual porosity formation and by history matching the methane production and CO{sub 2} injection. In addition to reservoir modeling of methane production and CO{sub 2} injection, tracer injection was modeled. Tracers serve as a surrogate for determining potential leakage of CO{sub 2}. The tracer was modeled as a non-reactive gas and was injected into the reservoir as a mixture along with CO{sub 2}. Geologic and geometric details of the field site, numerical modeling details of methane production, CO{sub 2} injection, and tracer injection are presented in this paper. Moreover, the numerical predictions of the tracer arrival times were compared with the measured field data. Results show that tracer modeling is useful in investigating movement of injected CO{sub 2} into the coal seam at the field site. Also, such new modeling techniques can be utilized to determine potential leakage pathways, and to investigate reservoir anisotropy and heterogeneity.

Siriwardane, Hema J.; Bowes, Benjamin D.; Bromhal, Grant S.; Gondle, Raj K.; Wells, Arthur W.; Strazisar, Brian R.

2012-07-01T23:59:59.000Z

244

Tracers and Tracer Interpretation | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen,LtdInformation Dixie Valley Geothermal Area (Reed, 2007)testing

245

Application of a NAPL partitioning interwell tracer test (PITT) to support DNAPL remediation at the Sandia National Laboratories/New Mexico chemical waste landfill  

SciTech Connect (OSTI)

Chlorinated solvents as dense non-aqueous phase liquid (DNAPL) are present at a large number of hazardous waste sites across the U.S. and world. DNAPL is difficult to detect in the subsurface, much less characterize to any degree of accuracy. Without proper site characterization, remedial decisions are often difficult to make and technically effective, cost-efficient remediations are even more difficult to obtain. A new non-aqueous phase liquid (NAPL) characterization technology that is superior to conventional technologies has been developed and applied at full-scale. This technology, referred to as the Partitioning Interwell Tracer Test (PITT), has been adopted from oil-field practices and tailored to environmental application in the vadose and saturated zones. A PITT has been applied for the first time at full-scale to characterize DNAPL in the vadose zone. The PITT was applied in December 1995 beneath two side-by-side organic disposal pits at Sandia National Laboratories/New Mexico (SNL/NM) RCRA Interim Status Chemical Waste Landfill (CWL), located in Albuquerque, New Mexico. DNAPL, consisting of a mixture of chlorinated solvents, aromatic hydrocarbons, and PCE oils, is known to exist in at least one of the two buried pits. The vadose zone PITT was conducted by injecting a slug of non-partitioning and NAPL-partitioning tracers into and through a zone of interest under a controlled forced gradient. The forced gradient was created by a balanced extraction of soil gas at a location 55 feet from the injector. The extracted gas stream was sampled over time to define tracer break-through curves. Soil gas sampling ports from multilevel monitoring installations were sampled to define break-through curves at specific locations and depths. Analytical instrumentation such as gas chromatographs and a photoacoustical analyzers operated autonomously, were used for tracer detection.

Studer, J.E. [INTERA Inc., Albuquerque, NM (United States); Mariner, P.; Jin, M. [INTERA Inc., Austin, TX (United States)] [and others

1996-05-01T23:59:59.000Z

246

An Electrical Analogue for Analysis of Tracer Distribution Kinetics in Biological Systems Author(s): J. R. MacDonald, E. G. Perry, L. L. Madison, D. W. Seldin  

E-Print Network [OSTI]

(s): J. R. MacDonald, E. G. Perry, L. L. Madison, D. W. Seldin Source: Radiation Research, Vol. 6, No. 5 of Tracer Distribution Kinetics in Biological Systems1 J. R. MACDONALD AND E. G. PERRY Research Division

Macdonald, James Ross

247

Prepping Power Engineers for the Smart Grid | Department of Energy  

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

Silverstein, Bonneville Power Administration's senior vice president for Transmission Services. As part of the power engineering curriculum, BPA partnered with WSU and the...

248

Final report for the Pre-Freshman Enrichment Program (PREP)  

SciTech Connect (OSTI)

This project reflected cooperation across the disciplines in the physical sciences, engineering, mathematics and computer science. The University of the Pacific served as the center for this pre-college program. The idea was to use this link as a pilot program.

NONE

1998-03-01T23:59:59.000Z

249

Center for Academic Success Tech Prep Student Packing List  

E-Print Network [OSTI]

are not supplied in the rooms. Please see our policy on Indoor Air Quality (IAQ) for more information. Prohibited · any appliance with an open or exposed heating element · lofts · masking tape, nails, other products

Pele?, Slaven

250

Prep time: 15 minutes Cook time: 30 minutes  

E-Print Network [OSTI]

, boneless chicken breast halves 1/2 cup sun-dried tomato dressing (Reserve 1/4 cup) 8 sun-dried tomatoes (not oil packed) 1 cup boiling water 1/3 cup low fat crumbled feta cheese 4 cups torn fresh spinach 1

251

Arch Coal upgrades a classic West Virginia prep plant  

SciTech Connect (OSTI)

Holden No. 22 coal preparation plant evolves from 1970s 'by zero' technology to modern, efficient fine coal recovery that includes a de-slime dense-media cyclone, compound spiral circuit. 3 figs.

Bethell, P.J.; Waine, C.

2008-07-15T23:59:59.000Z

252

A2Prep HPLC-MS Available Phenomenex Column List  

E-Print Network [OSTI]

.1% formic acid Organic: acetonitrile or acetonitrile with 0.1% formic acid Type Dimension (mm) Particle Solvent Type Aqueous: water or water with 0.05% trifluoroacetic acid Organic: acetonitrile, methanol: acetonitrile, methanol, isopropanol, (with/without 0.05% trifluoroacetic acid) Type Dimension (mm) Particle

Contractor, Anis

253

Program Description Human Resource Management & PHR Prep program will  

E-Print Network [OSTI]

skills and gain a deeper under- standing not only of best practices, laws, and regulations, but also organization or industry, including: Those with some HR responsibility, but whose learning has been world is in constant demand for change. Rutgers Executive Education works with our clients on a one

Garfunkel, Eric

254

BCM1 Prep Lab Slideshow | Sample Preparation Laboratories  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program CumulusA t i o nLiquids Reserve ClassBBEEBunch12BCM1

255

BCM2 Prep Lab Slideshow | Sample Preparation Laboratories  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program CumulusA t i o nLiquids Reserve

256

The Post-Shock Chemical Lifetimes of Outflow Tracers and a Possible New Mechanism to Produce Water Ice Mantles  

E-Print Network [OSTI]

We have used a coupled time-dependent chemical and dynamical model to investigate the lifetime of the chemical legacy left in the wake of C-type shocks. We concentrate this study on the chemistry of H2O and O2, two molecules which are predicted to have abundances that are significantly affected in shock-heated gas. Two models are presented: (1) a three-stage model of pre-shock, shocked, and post-shock gas; and (2) a Monte-Carlo cloud simulation where we explore the effects of stochastic shock activity on molecular gas over a cloud lifetime. In agreement with previous studies, we find that shock velocities in excess of 10 km s^-1 are required to convert all of the oxygen not locked in CO into H2O before the gas has an opportunity to cool. For pure gas-phase models the lifetime of the high water abundances, or ``H2O legacy'', in the post-shock gas is 4 - 7 x 10^5 years. Through the Monte Carlo cloud simulation we demonstrate that the time-average abundance of H2O is a sensitive function of the frequency of shocks. Thus we predict that the abundance of H2O and other known outflow tracers can be used to trace the history of shock activity in molecular gas. For gas-grain models we find that the abundance of water-ice on grain surfaces can be quite large and is comparable to that observed in molecular clouds. This offers a possible alternative method to create water mantles without resorting to grain surface chemistry: gas heating and chemical modification due to a C-type shock and subsequent depletion of the gas-phase species onto grain mantles.

Edwin A. Bergin; Gary J. Melnick; David A. Neufeld

1998-03-30T23:59:59.000Z

257

Brush potential curve tracer  

DOE Patents [OSTI]

A device for analyzing commutating characteristics of a motor or generator includes a holder for supporting a plurality of probes adjacent a brush of the motor or generator. Measurements of electrical current characteristics of the probes provides information useful in analyzing operation of the machine. Methods for employing a device in accordance with the invention are also disclosed.

Finch, H.A.

1985-06-21T23:59:59.000Z

258

THE BROOKHAVEN NATIONAL LABORATORY PERFLUOROCARBON TRACER TECHNOLOGY: A PROVEN AND COST EFFECTIVE METHOD TO VERIFY INTEGRITY AND MONITOR LONG TERM PERFORMANCE OF WALLS, FLOORS, CAPS, AND COVER SYSTEMS.  

SciTech Connect (OSTI)

Currently, containment system failures are detected by monitoring wells downstream of the waste site. Clearly this approach is inefficient, as the contaminants will have migrated from the disposal area before they are detected. Methods that indicate early cover failure (prior to contaminant release) or predict impending cover failure are needed. The Brookhaven National Laboratory (BNL) Perfluorocarbon Tracer (PFT) technology can measure performance changes and integrity losses as the cover ages. This allows early detection of cover failure or pending failure so that repair or replacement can be made before contaminants leave the disposal cell. The PFT technology has been successfully applied to four subsurface barrier problems, one leak detection problem from underground ducts, and one surface cover problem. Testing has demonstrated that the PFTs are capable of accurately detecting and locating leaks down to fractions of an inch. The PFT technology has several advantages over competing approaches. The ability to simultaneously use multiple PFTs separates it from other gas tracer technologies. Using multiple tracers provides independent confirmation of flaw location, helps to clearly define transport pathways, and can be used for confirmatory testing (e.g., repeat the test using a new tracer). The PFT tests provide a direct measure of flaws in a barrier, whereas other measurements (pressure, moisture content, temperature, subsidence) provide indirect measures that need interpretation. The focus of the six PFT demonstrations has been on engineering aspects of the technology with the intent of finding if a flaw existed in the barrier. Work remains to be done on the scientific basis for this technology. This includes determining PFT diffusion rates through various materials (soils and barrier) as a function of moisture content, determining the effects of barometric pumping on PFT flow for cover systems, and determining wind effects on side slopes of cover systems and their impact on PFT performance. It also includes application of models to assist in the design of the monitoring system and the interpretation of the data. The set of demonstrations was performed on small sites (< 1/4 acre). Future work also needs to consider scaling issues to develop and design optimal techniques for delivery and monitoring of the PFTs.

HEISER, J.; SULLIVAN, T.

2002-03-11T23:59:59.000Z

259

ALPHA SPECTROMETRIC EVALUATION OF SRM-995 AS A POTENTIAL URANIUM/THORIUM DOUBLE TRACER SYSTEM FOR AGE-DATING URANIUM MATERIALS  

SciTech Connect (OSTI)

Uranium-233 (t{sub 1/2} {approx} 1.59E5 years) is an artificial, fissile isotope of uranium that has significant importance in nuclear forensics. The isotope provides a unique signature in determining the origin and provenance of uranium-bearing materials and is valuable as a mass spectrometric tracer. Alpha spectrometry was employed in the critical evaluation of a {sup 233}U standard reference material (SRM-995) as a dual tracer system based on the in-growth of {sup 229}Th (t{sub 1/2} {approx} 7.34E3 years) for {approx}35 years following radiochemical purification. Preliminary investigations focused on the isotopic analysis of standards and unmodified fractions of SRM-995; all samples were separated and purified using a multi-column anion-exchange scheme. The {sup 229}Th/{sup 233}U atom ratio for SRM-995 was found to be 1.598E-4 ({+-} 4.50%) using recovery-corrected radiochemical methods. Using the Bateman equations and relevant half-lives, this ratio reflects a material that was purified {approx} 36.8 years prior to this analysis. The calculated age is discussed in contrast with both the date of certification and the recorded date of last purification.

Beals, D.

2011-12-06T23:59:59.000Z

260

TRADOC Pam 525-3-1 (This page intentionally blank.)  

E-Print Network [OSTI]

forces conduct operations as part of the joint force to deter conflict, prevail in war, and succeed the framework of full-spectrum operations: 1) Army forces conduct combined arms maneuver to gain physical organized, trained, and equipped for prompt and sustained operations on land. As one of the critical

US Army Corps of Engineers

Note: This page contains sample records for the topic "tracer prep blanks" 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

Design and analysis of recycled content sign blanks  

E-Print Network [OSTI]

. In response, industries have developed composite materials made of recycled plastic, fiber-reinforced plastics, and alloys made of recycled aluminum. Two predoininantly reclaimed inaterials have been investigated for use as sign substrates. The first... in avoiding costs from tort actions. Aluminuin and wood are the substrates most frequently used for traffic signs. Grades 6061 (heat beatable) and 5052 (non-heat treatable) aluminum alloys are widely used. Currently, grade 3000 aluminum alloys, which...

Harrison, Ben Frank

1996-01-01T23:59:59.000Z

262

" target="_blank">The University of Tokyo Site Policy  

E-Print Network [OSTI]

work." KEK-PF produced several leading-edge technology breakthroughs, among them the undulator-lying mountain range in Hyogo Prefecture, western Japan. High above the town is Harima Science Garden City, its of Japan's largest ballparks, is SPring-8, a synchrotron radiation facility managed by RIKEN and containing

Miyashita, Yasushi

263

2 2005 Troy D. Downen This page intentionally left blank.  

E-Print Network [OSTI]

time to the domain of business aviation. A comprehensive 40-year historical product database to extract objective findings from historical industry market activities. The RVI approach is used to develop evidence in support of a ratio theory of product price and value differentiation in the business airplane

de Weck, Olivier L.

264

The Memory of My Parents This Page is Blank.  

E-Print Network [OSTI]

Rebecca Dodder; I learned a lot from them. My colleagues in the Mexico City Program Professor Joseph

de Weck, Olivier L.

265

LEAVE THIS SPACE BLANK CN FIRST PAGE ONLY.  

E-Print Network [OSTI]

Leader-Heat Pump RED, Oak Ridge National Laboratory, Oak Ridge, Tennessee F. A. Creswick, member ASHRAE, Program Manager-Heat Pump R&D Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee S. K. Fischer, Research Associate, Oak Ridge National Laboratory, Oak Ridge, Tennessee W. L. Jackson, Computer

Oak Ridge National Laboratory

266

Foundations of Mind This page intentionally left blank  

E-Print Network [OSTI]

Auckland Cape Town Dar es Salaam Hong Kong Karachi Kuala Lumpur Madrid Melbourne Mexico City Nairobi New

Pylyshyn, Zenon

267

High Speed Joining of Dissimilar Alloy Aluminum Tailor Welded Blanks  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

268

(This page left intentionally blank) Table of Contents  

E-Print Network [OSTI]

....................................................................................................................... 1 CHAPTER 2 - RESPONSIBILITY OF DEPARTMENT HEAD........................................................................................... 3 C. Requirements of Department Head/Principal Investigator

269

(page intentionally blank) CENTRE FOR THE STUDY OF BIOLOGICAL DIVERSITY  

E-Print Network [OSTI]

in developing Kaieteur National Park, Guyana for ecotourism and conservation by Carol L. Kelloff edited Institution. The use of biodiversity data in developing Kaieteur National Park, Guyana for ecotourism

Mathis, Wayne N.

270

Safety System Oversight Staffing Analysis (Instructions, Blank Sheet and  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAXBalancedDepartmentRestrictionsExample Sheet) | Department of Energy Safety

271

This Page Left Blank Intentionally Informing Rangeland Stewardship With  

E-Print Network [OSTI]

Learned From Yolo County, California1 Vance Russell,2 Chris Rose,2 and Miles DaPrato2 Abstract, and Michigan State University conducted multi-disciplinary studies across a range of habitats in Yolo County watershed in Yolo County, California, is an important contributor to the health of the Bay-Delta ecosystem

Standiford, Richard B.

272

The bias of the submillimetre galaxy population: SMGs are poor tracers of the most massive structures in the z ~ 2 Universe  

E-Print Network [OSTI]

It is often claimed that overdensities of (or even individual bright) submillimetre-selected galaxies (SMGs) trace the assembly of the most-massive dark matter structures in the Universe. We test this claim by performing a counts-in-cells analysis of mock SMG catalogues derived from the Bolshoi cosmological simulation to investigate how well SMG associations trace the underlying dark matter structure. We find that SMGs exhibit a relatively complex bias: some regions of high SMG overdensity are underdense in terms of dark matter mass, and some regions of high dark matter overdensity contain no SMGs. Because of their rarity, Poisson noise causes scatter in the SMG overdensity at fixed dark matter overdensity. Consequently, rich associations of less-luminous, more-abundant galaxies (i.e. Lyman-break galaxy analogues) trace the highest dark matter overdensities much better than SMGs. Even on average, SMG associations are relatively poor tracers of the most significant dark matter overdensities because of `downsiz...

Miller, Tim B; Chapman, Scott C; Behroozi, Peter S

2015-01-01T23:59:59.000Z

273

Final report of the second dye-tracer test at the Chesnut Ridge Security Pits, Y-12 Plant, Oak Ridge, Tennessee  

SciTech Connect (OSTI)

Martin Marietta Energy Systems, Inc. (Energy Systems) manages a closed hazardous waste disposal unit, Chestnut Ridge Security Pits (CRSP), in the form of two trenches and several auger-holes, located on top of the eastern portion of Chestnut Ridge at the Department of Energy (DOE) Oak Ridge Y-12 Plant in Tennessee. The groundwater monitoring system for the unit presently consists of a network of upgradient and downgradient monitor wells. To investigate the discharge of groundwater to springs and streams, Energy Systems, through Geraghty and Miller, Inc., conducted an initial dye-tracer study during the driest part of 1990. The dye was detected at some of the monitoring sites, but verification was necessary due to the proximity of some sites to extraneous dye sources. Based on the results of the initial study, Energy Systems recommended to the Tennessee Department of Environment and Conservation (TDEC) in the 1990 Groundwater Quality Assessment Report (GWQAR) (HSW 1991) for the CRSP that a second dye-tracer study be conducted during the wet weather season. The procedures and materials were reviewed, and a field inspection of the monitoring sites was performed in the fall of 1991. The actual test commenced during the first week of February 1992 with a 4-week baseline monitoring period to determine the inherent variability of the emission spectra within the wavelength range characteristic of Rhodamine WT (RWT) and Fluorescent Brightener 28 (FB28) or similar naturally occuring compounds within in the aquifer. This is commonly referred as background in discussion of minimum detectable levels of dyes. On March 13, RWT and FB28 were injected; weekly monitoring began with the collection of the first set of detectors on March 19. The test was originally scheduled to conclude after 12 weeks but was extended to 18 weeks when no definitive results were obtained.

NONE

1992-11-01T23:59:59.000Z

274

Mon. Not. R. Astron. Soc. 372, L63L67 (2006) doi:10.1111/j.1745-3933.2006.00227.x Detached shells as tracers of asymptotic giant branchinterstellar  

E-Print Network [OSTI]

as tracers of asymptotic giant branch­interstellar medium bow shocks C. J. Wareing,1 Albert A. Zijlstra,1-dimensional hydrodynamic simulation reproduces the structure as a bow shock into the oncoming ISM. We propose) suggested that such shells are the result of mass-loss varia- tions and in particular a thermal pulse or He

Speck, Angela Karen

275

A semi-analytical model for heat and mass transfer in geothermal reservoirs to estimate fracture surface-are-to-volume ratios and thermal breakthrough using thermally-decaying and diffusing tracers  

SciTech Connect (OSTI)

A semi-analytical model was developed to conduct rapid scoping calculations of responses of thermally degrading and diffusing tracers in multi-well tracer tests in enhanced geothermal systems (EGS). The model is based on an existing Laplace transform inversion model for solute transport in dual-porosity media. The heat- and mass-transfer calculations are decoupled and conducted sequentially, taking advantage of the fact that heat transfer between fractures and the rock matrix is much more rapid than mass transfer and therefore mass transfer will effectively occur in a locally isothermal system (although the system will be nonisothermal along fracture flow pathways, which is accounted for by discretizing the flow pathways into multiple segments that have different temperature histories). The model takes advantage of the analogies between heat and mass transfer, solving the same governing equations with k{sub m}/({rho}C{sub p}){sub w} being substituted for {phi}D{sub m} in the equation for fracture transport and k{sub m}/({rho}C{sub p}){sub m} being subsituted for D{sub m} in the equation for matrix transport; where k = thermal conductivity (cal/cm-s-K), {rho} = density (g/cm{sup 3}), C{sub p} = heat capacity (at constant pressure) (cal/g-K), {phi} = matrix porosity, and D = tracer diffusion coefficient (cm{sup 2}/s), with the subscripts w and m referring to water and matrix, respectively. A significant advantage of the model is that it executes in a fraction of second on a single-CPU personal computer, making it very amenable for parameter estimation algorithms that involve repeated runs to find global minima. The combined thermal-mass transport model was used to evaluate the ability to estimate when thermal breakthrough would occur in a multi-well EGS configuration using thermally degrading tracers. Calculations were conducted to evaluate the range of values of Arrhenius parameters, A and E{sub {alpha}} (pre-exponential factor, 1/s, and activation energy, cal/mol) required to obtain interpretable responses of thermally-degrading tracers that decay according to the rate constant k{sub d} = Ae{sup -E{sub {alpha}}/RT}, where k{sub d} = decay rate constant (1/s), R = ideal gas constant (1.987 cal/mol-K), and T = absolute temperature (K). It is shown that there are relatively narrow ranges of A and E{sub {alpha}} that will result in readily interpretable tracer responses for any given combination of ambient reservoir temperature and working fluid residence time in a reservoir. The combined model was also used to simulate the responses of conservative tracers with different diffusion coefficients as a way of estimating fracture surface-area-to-volume ratios (SA/V) in multi-well EGS systems. This method takes advantage of the fact that the differences in breakthrough curves of tracers with different matrix diffusion coefficients are a function of SA/V. The model accounts for differences in diffusion coefficients as a function of temperature so that tracer responses obtained at different times can be used to obtain consistent estimates of SA/V as the reservoir cools down. Some single-well applications of this approach are simulated with a numerical model to demonstrate the potential to evaluate the effectiveness of EGS stimulations before a second well is drilled.

Reimus, Paul W [Los Alamos National Laboratory

2010-12-08T23:59:59.000Z

276

Using dissolved noble gas and isotopic tracers to evaluate the vulnerability of groundwater resources in a small, high elevation catchment to predicted climate changes  

SciTech Connect (OSTI)

We use noble gas concentrations and multiple isotopic tracers in groundwater and stream water in a small high elevation catchment to provide a snapshot of temperature, altitude, and physical processes at the time of recharge; and to determine subsurface residence times of different groundwater components. They identify three sources that contribute to groundwater flow: (1) seasonal groundwater recharge with short travel times, (2) water from bedrock aquifers that have elevated radiogenic {sup 4}He, and (3) upwelling of deep fluids that have 'mantle' helium and hydrothermal carbon isotope signatures. Although a bimodal distribution in apparent groundwater age indicates that groundwater storage times range from less than a year to several decades, water that recharges seasonally is the largest likely contributor to stream baseflow. Under climate change scnearios with earlier snowmelt, the groundwater that moves through the alluvial aquifer seasonally will be depleted earlier, providing less baseflow and possible extreme low flows in the creek during summer and fall. Dissolved noble gas measurements indciate recharge temperatures are 5 to 11 degrees higher than would be expected for direct influx of snowmelt, and that excess air concentrations are lower than would be expected for recharge through bedrock fractures. Instead, recharge likely occurs over diffuse vegetated areas, as indicated by {delta}{sup 13}C-DIC values that are consistent with incorporation of CO{sub 2} from soil respiration. Recharge temperatures are close to or slightly higher than mean annual air temperature, and are consistent with recharge during May and June, when snowpack melting occurs.

Singleton, M J; Moran, J E

2009-10-02T23:59:59.000Z

277

Optical and X-ray clusters as tracers of the supercluster-void network. III Distribution of Abell and APM clusters  

E-Print Network [OSTI]

We present a comparison of Abell and APM clusters of galaxies as tracers of the large scale structure of the Universe. We investigate selection functions of both cluster catalogs. We show that the supercluster-void network can be traced with both cluster samples; the network has a well-defined period of ~120 h^{-1} Mpc. We calculate the correlation function and the power spectrum for Abell and APM cluster samples. The APM cluster sample with measured redshifts covers a small volume which contains only a few very rich superclusters that surround one void and have exceptionally large mutual separations. Due to this property the maximum of the power spectrum of APM clusters with measured velocities is shifted to larger scales than the corresponding feature in the power spectrum of Abell clusters. We conclude that the APM sample is not representative for the large-scale structure as a whole due to the small space coverage. We present a catalog of superclusters of galaxies, based on APM clusters up to a redshift z_{lim}=0.13.

M. Einasto; J. Einasto; E. Tago; H. Andernach; G. B. Dalton; V. M"uller

2000-12-29T23:59:59.000Z

278

Tracer-level radioactive pilot-scale test of in situ vitrification for the stabilization of contaminated soil sites at ORNL  

SciTech Connect (OSTI)

A field demonstration of in situ vitrification (ISV) was completed in May 1991, and produced approximately 12 Mg of melted earthen materials containing 12.7 mCi of radioactivity within 500 g of sludge in amodel of an old seepage trench waste disposal unit. Past waste disposal operations at Oak Ridge National Laboratory have left several contaminated seepage sites. In planning for remediation of such sites, ISV technology has been identified as a leading candidate because of the high risks associated with any retrieval option and because of the usual high quality of vitreous waste form. Major isotopes placed in the test trench were {sup 137}Cs and {sup 90}Sr, with lesser amounts of {sup 6O}Co, {sup 241}Am, and {sup 239,240}Pu. A total of 29 MWh of electrical power was delivered to the ground over a 5-day period producing a melt depth of 8.5 ft. During melting, 2.4% of the {sup 137}Cs volatilized from the melt into an off-gas containment hood and was captured quantitatively on a high efficiency particulate air filter. No volatilization of {sup 90}Sr, {sup 241}Am, or {sup 239,240}Pu was detected and > 99.993% retention of these isotopes in the melt was estimated. The use of added rare earth tracers (Ce, La, and Nd), as surrogates for transuranic isotopes, led to estimated melt retentions of >99.9995% during the test. The molten material, composed of the native soil and dolomitic limestone used for filling the test trench, reached a processing temperature of 1500{degrees}C. Standardized leaching procedures using Product Consistency Testing indicated that the ISV product has excellent characteristics relative to other vitreous nuclear waste forms.

Spalding, B.P.; Jacobs, G.K.; Naney, M.T. [Oak Ridge National Lab., TN (United States); Dunbar, N.W. [New Mexico Bureau of Mines and Mineral Resources, Socorro, NM (United States); Tixier, J.S.; Powell, T.D. [Pacific Northwest Lab., Richland, WA (United States)

1992-11-01T23:59:59.000Z

279

Tracer-level radioactive pilot-scale test of in situ vitrification for the stabilization of contaminated soil sites at ORNL  

SciTech Connect (OSTI)

A field demonstration of in situ vitrification (ISV) was completed in May 1991, and produced approximately 12 Mg of melted earthen materials containing 12.7 mCi of radioactivity within 500 g of sludge in amodel of an old seepage trench waste disposal unit. Past waste disposal operations at Oak Ridge National Laboratory have left several contaminated seepage sites. In planning for remediation of such sites, ISV technology has been identified as a leading candidate because of the high risks associated with any retrieval option and because of the usual high quality of vitreous waste form. Major isotopes placed in the test trench were [sup 137]Cs and [sup 90]Sr, with lesser amounts of [sup 6O]Co, [sup 241]Am, and [sup 239,240]Pu. A total of 29 MWh of electrical power was delivered to the ground over a 5-day period producing a melt depth of 8.5 ft. During melting, 2.4% of the [sup 137]Cs volatilized from the melt into an off-gas containment hood and was captured quantitatively on a high efficiency particulate air filter. No volatilization of [sup 90]Sr, [sup 241]Am, or [sup 239,240]Pu was detected and > 99.993% retention of these isotopes in the melt was estimated. The use of added rare earth tracers (Ce, La, and Nd), as surrogates for transuranic isotopes, led to estimated melt retentions of >99.9995% during the test. The molten material, composed of the native soil and dolomitic limestone used for filling the test trench, reached a processing temperature of 1500[degrees]C. Standardized leaching procedures using Product Consistency Testing indicated that the ISV product has excellent characteristics relative to other vitreous nuclear waste forms.

Spalding, B.P.; Jacobs, G.K.; Naney, M.T. (Oak Ridge National Lab., TN (United States)); Dunbar, N.W. (New Mexico Bureau of Mines and Mineral Resources, Socorro, NM (United States)); Tixier, J.S.; Powell, T.D. (Pacific Northwest Lab., Richland, WA (United States))

1992-11-01T23:59:59.000Z

280

Thermo Tracer Infrared Thermal Imager  

E-Print Network [OSTI]

such as production lines, electric power facilities, petrochemical plants and public institutions, etc. by thermal in electric power, petrochemical plant facilities G Intruder monitoring Important facilities (nuclear power, harbor, airport, dam, river, water purification plant, etc.) G Fire monitoring Important facilities, wide

Walker, D. Greg

Note: This page contains sample records for the topic "tracer prep blanks" 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

Tracer Testing | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen,LtdInformation Dixie Valley Geothermal Area (Reed, 2007)

282

FINAL REPORT: EDDY-COVARIANCE FLUX TOWER AND TRACER TECHNOLOGY SUPPORT FOR THE UNIVERSITY OF GEORGIA PROPOSAL: FROM TOWER TO PIXEL: INTEGRATION OF PATCH-SIZE NEE USING EXPERIMENTAL MODELING FOOTPRINT ANALYSIS.  

SciTech Connect (OSTI)

Brookhaven National Laboratory has been funded since October of 2000 to provide assistance to the University of Georgia in conducting footprint analyses of individual towers based on meteorology and trace gas measurements. Brookhaven researchers conducted air flow measurements using perfluorocarbon tracers and meteorological instrumentation for three experimental campaigns at an AmeriFlux research site maintained by Dr. Monique Leclerc near Gainesville, FL. In addition, BNL provided assistance with remote data collection and distribution from remote field sites operated by Dr. John Hom of the US Forest Service in the Pine Barrens of New Jersey and at FACE research sites in North Carolina and Wisconsin.

LEWIN,K.F.; NAGY, J.; WATSON, T.B.

2007-09-01T23:59:59.000Z

283

Atmospheric and soil-gas monitoring for surface leakage at the San Juan Basin CO{sub 2} pilot test site at Pump Canyon New Mexico, using perfluorocarbon tracers, CO{sub 2} soil-gas flux and soil-gas hydrocarbons  

SciTech Connect (OSTI)

Near-surface monitoring and subsurface characterization activities were undertaken in collaboration with the Southwest Regional Carbon Sequestration Partnership on their San Juan Basin coal-bed methane pilot test site near Navajo City, New Mexico. Nearly 18,407 short tons (1.670 × 107 kg) of CO{sub 2} were injected into 3 seams of the Fruitland coal between July 2008 and April 2009. Between September 18 and October 30, 2008, two additions of approximately 20 L each of perfluorocarbon (PFC) tracers were mixed with the CO{sub 2} at the injection wellhead. PFC tracers in soil-gas and in the atmosphere were monitored over a period of 2 years using a rectangular array of permanent installations. Additional monitors were placed near existing well bores and at other locations of potential leakage identified during the pre-injection site survey. Monitoring was conducted using sorbent containing tubes to collect any released PFC tracer from soil-gas or the atmosphere. Near-surface monitoring activities also included CO{sub 2} surface flux and carbon isotopes, soil-gas hydrocarbon levels, and electrical conductivity in the soil. The value of the PFC tracers was demonstrated when a significant leakage event was detected near an offset production well. Subsurface characterization activities, including 3D seismic interpretation and attribute analysis, were conducted to evaluate reservoir integrity and the potential that leakage of injected CO{sub 2} might occur. Leakage from the injection reservoir was not detected. PFC tracers made breakthroughs at 2 of 3 offset wells which were not otherwise directly observable in produced gases containing 20–30% CO{sub 2}. These results have aided reservoir geophysical and simulation investigations to track the underground movement of CO{sub 2}. 3D seismic analysis provided a possible interpretation for the order of appearance of tracers at production wells.

Wells, Arthur W.; Diehl, J. Rodney; Strazisar, Brian R.; Wilson, Thomas; H Stanko, Dennis C.

2012-05-01T23:59:59.000Z

284

CSF Extract Prep for Spindle Assembly Claire Walczak 11/95  

E-Print Network [OSTI]

Stock Buffers: 20X XB Salts: 2 M KCl 20 mM MgCl2 2 mM CaCl2 store at 4 deg C. 2 M Sucrose: SterileM EDTA 100 mM NaCl 2 mM KCl 1 mM MgCl2 2 mM CaCl2 make 2 l- store at RT. XB: 10 mM HEPES, pH 7.7 1 mM MgCl2 0.1 mM CaCl2 100 mM KCl #12;50 mM sucrose make 250 ml- make fresh. CSF-XB: 10 mM HEPES, pH 7.7 2 m

Mitchison, Tim

285

Ready, Set . . . Get Prepped for Monday's Launch of the 'America's Next  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergy 0611__Joint_DOE_GoJ_AMS_Data_v3.pptx More DocumentsCommunicationsProvides anTop Energy

286

Under Secretary Klotz delivers remarks at PREP ribbon-cutting | National  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered energy consumption by sectorlong version) The0Radiationadvanced RF

287

Sandia National Laboratories: One-Pot-to-Prep Biomass for Biofuels  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive SolarEducationStationCSP Resources On SeptemberNuclear Energy

288

Microsoft Word - Andrews_SREL-CV-Nov-2013-no-in-prep_no-refs.docx  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces andMappingENVIRONMENTAL IMPACT STATEMENTbelow).A3PM-10978, AlcoaKIMBERLY M.

289

Students Use JLab Website to Prep for Virginia Standards of Learning Tests  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security AdministrationcontrollerNanocrystalline Gallium Oxide Thin Films. |Structures22ndEnergy Count|

290

JLab's Science Education Website Helps Students Prep for 2006 Standards of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfraredJefferson Lab Click on the followingLearning Tests | Jefferson

291

Special GMAT Prep Course The UC Davis Graduate School of Management and The Princeton Review  

E-Print Network [OSTI]

Review, 13th Edition. Access to online portal with practice questions and drills for 120 days. 10 completely new Computer Adaptive practice GMATs for the most realistic testing experience. Locations and Dates Pick the four-hour session that works best for you: October 20, February 23, or April 13 Saturday

California at Davis, University of

292

June 2014 | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

at PREP ribbon-cutting Under Secretary Klotz delivered remarks at the Pantex Renewable Energy Project (PREP) ribbon-cutting this week. PREP establishes the largest...

293

PROOF OF CONCEPT TEST OF A UNIQUE GASEOUS PERFLUROCARBON TRACER SYSTEM FOR VERIFICATION AND LONG TERM MONITORING OF CAPS AND COVER SYSTEMS CONDUCTED AT THE SAVANNAH RIVER SITE BENTONITE MAT TEST FACILITY.  

SciTech Connect (OSTI)

Engineered covers have been placed on top of buried/subsurface wastes to minimize water infiltration and therefore, release of hazardous contaminants. In order for the cover to protect the environment it must remain free of holes and breaches throughout its service life. Covers are subject to subsidence, erosion, animal intrusion, plant root infiltration, etc., all of which will affect the overall performance of the cover. The U.S. Department of Energy Environmental Management (DOE-EM) Program 2006 Accelerated Cleanup Plan is pushing for rapid closure of many of the DOE facilities. This will require a great number of new cover systems. Some of these new covers are expected to maintain their performance for periods of up to 1000 years. Long-term stewardship will require monitoring/verification of cover performance over the course of the designed lifetime. In addition, many existing covers are approaching the end of their design life and will need validation of current performance (if continued use is desired) or replacement (if degraded). The need for a reliable method of verification and long-term monitoring is readily apparent. Currently, failure is detected through monitoring wells downstream of the waste site. This is too late as the contaminants have already left the disposal area. The proposed approach is the use of gaseous Perfluorocarbon tracers (PFT) to verify and monitor cover performance. It is believed that PFTs will provide a technology that can verify a cover meets all performance objectives upon installation, be capable of predicting changes in cover performance and failure (defined as contaminants leaving the site) before it happens, and be cost-effective in supporting stewardship needs. The PFTs are injected beneath the cover and air samples taken above (either air samples or soil gas samples) at the top of the cover. The location, concentrations, and time of arrival of the tracer(s) provide a direct measure of cover performance. PFT technology can be used as a non-invasive method (if injection ports are emplaced prior to cover emplacement) on new covers or a minimally invasive method on existing covers. PFT verification will be useful at all buried waste sites using a cover system (e.g., treated or untreated chemical waste landfills) including DOE, commercial, and private sector sites. This paper discusses the initial field trial of the PFT cover monitoring system performed at the Savannah River Site (SRS) in FY01. The experiments provided a successful proof-of-principle test of the PFT technology in monitoring caps and covers. An injection and sampling array was installed in the Bentomat test cap at the SRS Caps Test Facility. This system contained 6 feet of sandy soil beneath a 1/2 inch geosynthetic clay liner covered by an HDPE liner which was covered by 2 feet of clayey top soil. PFTs were injected into the sandy soil though a pre-existing system of access pipes below the cap and soil gas samples were taken on top of the cap. Mid-way into the injection period a series of 1 1/2 inch holes were punched into the cap (through the geomembrane) to provide a positive breach in the cap. Data will be presented that shows the initial cap was fairly tight and leak free and that the artificially induced leaks were detectable within two hours of occurrence.

HEISER,J.; SULLIVAN,T.; SERRATO,M.

2002-02-24T23:59:59.000Z

294

Reservoir environment of the Onuma geothermal power plant, northeast Japan, estimated by forward analysis of long-term artificial-tracer concentration change, using single-box-model simulator  

SciTech Connect (OSTI)

A single-box-model numerical simulator for personal computer analysis was developed in order to estimate macroscopic parameter values for exploited geothermal reservoirs and essential fluids coming from the depth. The simulator was designed to compute history data concerning total production and reinjection fluids at geothermal power plants from the assumed parameter values, based on conservation laws for water mass, heat energy and masses of conservative chemical constituents of geothermal fluids. Using two kinds of forward analysis techniques, i.e. the cast-net and pursuit methods, programs containing the simulator can semiautomatically select the optimum combination of the unknown parameter values by minimizing the differences between the simulated and measured history data for specific enthalpy and chemical compositions of the production fluids. The forward analysis programs were applied to the history data from the Onuma geothermal power plant (production capacity, 10MWe) where waste hot water reinjection, chemical monitoring and artificial tracer tests have been conducted since 1970, almost the beginning of the geothermal exploitation. Using the history data, enthalpy and iodine concentrations of the total production fluids with the amounts of KI tracer injected as spikes, the macroscopic parameter values for the exploited reservoir and the essential hot water from the depth were uniquely determined as follows: mass of the hot water convecting in the exploited reservoir (M0), 3.23x109kg; recycling fraction of the reinjected waste hot water to the reservoir (R), 0.74; specific enthalpy of the essential water from the depth (H1), 385kcalkg; iodine concentration of the water (I1), 0.086mg/kg with chlorine concentration (C1), 259mg/kg. These results support the conceptual model that the exploited Onuma reservoir mainly in the Tertiary volcanics is supplied with the neutral Na-Cl type hot water of abnormally high B/CI mole ratio of around 1.0 by a large essential reservoir distributed at depth in the Paleozoic to Mesozoic detrital marine sedimentary rocks.

Shigeno, Hiroshi; Takahashi, Masaaki; Tetsuro, Noda

1993-01-28T23:59:59.000Z

295

This Page Left Blank Intentionally Nutrient and Sediment Transport From a  

E-Print Network [OSTI]

them use best management practices to protect water quality when these conversions are made (Dahlgren quality protection measures at the Cuesta Ridge Vineyard. Water samples were taken during storm events of the vineyard system, with the severity of leakage depending upon specific management practices in a given

Standiford, Richard B.

296

automotive tailor-welded blank: Topics by E-print Network  

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

with Ttic5ms, Tcycle40ms. lic scheduling on automotive Navet, Nicolas 285 2001-01-0308 FMEA-based Design for Remanufacture using Automotive- Engineering Websites Summary: . The...

297

Vehicle Technologies Office Merit Review 2014: High Speed Joining of Dissimilar Alloy Aluminum Tailor Welded Blanks  

Broader source: Energy.gov [DOE]

Presentation given by Pacific Northwest National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high...

298

This page intentionally left blank. `CALLS CONSIDERED HARMFUL' AND OTHER OBSERVATIONS  

E-Print Network [OSTI]

@research.att.com Abstract. The software application domain of customer-oriented telephony is worth the attention approaches. 1. Introduction In the evolution of formal methods for software engineering, the time has come to develop formal methods for particular application domains [10,24]. This paper concerns the domain

Greenberg, Albert

299

Immunization Consent for Persons Under 18 (please fill in blanks neatly)  

E-Print Network [OSTI]

. Hoarseness; sore, red or itchy eyes; cough, fever, aches. PNEUMONIA VACCINE ADVERSE REACTIONS: redness

Singh, Jaswinder Pal

300

Vehicle Technologies Office Merit Review 2014: Aluminum Formability Extension through Superior Blank Processing  

Broader source: Energy.gov [DOE]

Presentation given by Pacific Northwest National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about...

Note: This page contains sample records for the topic "tracer prep blanks" 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

Lithogenic and cosmogenic tracers in catchment hydrology  

SciTech Connect (OSTI)

A variety of physical processes affect solute concentrations within catchment waters. The isotopic compositions of the solutes can indicate which processes have determined the observed concentrations. These processes together constitute the physical history of the water, which is one of the primary concerns in hydrology. Many groundwater solutes are derived as a result of interaction between the water and the rock and/or soil within the system. These are termed {open_quotes}lithogenic{close_quotes} solutes. The isotopic compositions of these solutes provide information regarding rock-water interactions. Many other solutes have their isotopic compositions determined both internally and externally to the catchment system. Important members of this group include solutes that have isotopic compositions produced by atomic particle interactions with other nuclides. The source of the atomic particles can be cosmic radiation (producing {open_quotes}cosmogenic{close_quotes} nuclides in the atmosphere and land surface), anthropogenic nuclear reactions (producing {open_quotes}thermonuclear{close_quotes} nuclides), or radioactive and fission decay of naturally-occurring elements, such as U and Th (producing {open_quotes}in-situ{close_quotes} lithogenic nuclides in the deep subsurface). Current language usage often combines all of the atomic particle-produced nuclides under the heading {open_quotes}cosmogenic nuclides{close_quotes}, and for simplicity we will often follow that usage, although always clearly indicating which variety is being discussed. This paper addresses the processes that affect the lithogenic and cosmogenic solute compositions in groundwater, and how these compositions can therefore be used in integrative ways to understand the physical history of groundwater within a catchment system.

Nimz, G.J.

1995-01-01T23:59:59.000Z

302

Microseismic Tracer Particles for Hydraulic Fracturing  

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

can be discriminateddetected that correspond to only the portion of the hydraulic fracture that contains the proppant material and can be expected to be conductive to the flow...

303

Ocean Tracers! John Bullister (NOAA-PMEL)  

E-Print Network [OSTI]

Chlorofluorocarbons- CFCs CFC-11 (F-11) - CCl3F CFC-12 (F-12) - CCl2F2 Carbon tetrachloride - CCl4 Sulfur Hexafluoride - SF6 Nitrous Oxide - N2O 2014 PMEL Kha$wala et. al., (2009) Anthropogenic carbon in the ocean #12;Quality · Recognized

304

3, 24652497, 2003 Nudged GCM tracer  

E-Print Network [OSTI]

et al. Title Page Abstract Introduction Conclusions References Tables Figures Back Close Full Screen, The Netherlands 2 Space Research Organisation of the Netherlands (SRON), Utrecht, The Netherlands 3 Royal Netherlands Meteorological Institute (KNMI), De Bilt, The Netherlands 4 Max Planck Institut f¨ur Chemie (MPI

Paris-Sud XI, Université de

305

Tracers and Exploration Technologies | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyThe EnergyDepartment7 th ,Top Value AddedTotalTown ofTown

306

Microsoft Word - S04040_tracer.doc  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*. . :theWaterNRCGJ - -7ofDispersivity

307

ARM - CARES - Tracer Forecast for CARES  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered‰PNGExperience4AJ01)

308

Microseismic Tracer Particles for Hydraulic Fracturing  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces andMapping theEnergyInnovationMichaelGE1 Micropulse Lidar

309

Category:Tracer Testing | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBostonFacilityCascadeJumpInformationcontainingTerritories

310

Tracer Testing (Klein, 2007) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen,Ltd

311

Tracer populations in the local group  

E-Print Network [OSTI]

or diploma or other qualification at any other University. I further state that no part of my thesis has already been or is being concurrently submitted for any such degree, diploma or other qualification. This dissertation is the result of my own work... of satellites then known. They too concluded that either the hierarchical paradigm was in error, or that there was more substructure in the MW halo that contained too few baryons to be observed with current equipment. Recent dSph discoveries have gone a long way...

Watkins, Laura Louise

2011-04-19T23:59:59.000Z

312

RCT#2-Instr for Prep of Rad Waste Disposal 7/00 Page 1 of 6 RADIATION CONTROL TECHNIQUE #2  

E-Print Network [OSTI]

INSTRUCTIONS FOR PREPARATION OF RADIOACTIVE WASTE FOR DISPOSAL I. PURPOSE: To establish a standard procedure for preparing Radioactive Waste and Radioactive Mixed Waste (RMW) to ensure it's efficient pick-up and disposal, labels, and pickup forms. III. PURPOSE: A. The goals of the radioactive waste program are to; - Minimize

Slatton, Clint

313

LSU's Ultimate PMP Certification Prep Course April 11-15, 2011 and October 24-28, 2011  

E-Print Network [OSTI]

Project Risk Management o Project Procurement Management · Learn the materials necessary to pass of project management? Project Management Professional ® (PMP ® ) certification, through the Project knowledge, understanding, and application of project management principles and practices. However, obtaining

314

A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 SouthWater Rights,Information Of The Transiel Method On The

315

New MAFAC Member from Hawaii Appointed (April 22, 2013) Acting Secretary of Commerce Rebecca Blank has appointed John Corbin of  

E-Print Network [OSTI]

is in tropical island and ocean thermal energy conversion (OTEC) aquaculture. He is a member of the American

316

DVR Rates Fiscal Year 2014 Division of Veterinary Resources  

E-Print Network [OSTI]

veterinarian. Acute and Intensive Care ­ 14/28 Complex Service Price Anesthesia Prep & Induction - Dog $107.04 Anesthesia Prep & Induction - Pig $90.04 Anesthesia Prep & Induction - Rabbit $42.37 Anesthesia Prep w/o Induction - Rabbit $14.50 Anesthesia Recovery - Standard $57.37 Anesthesia Recovery - Complex $172

Bandettini, Peter A.

317

REAL-TIME TRACER MONITORING OF RESERVOIR STIMULATION PROCEDURES  

SciTech Connect (OSTI)

Ongoing Phase 2 work comprises the development and field-testing of a real-time reservoir stimulation diagnostic system. Phase 3 work commenced in June 2001, and involved conducting research, development and field-testing of real-time enhanced dual-fluid stimulation processes. Experimental field-testing to date includes three well tests. Application of these real-time stimulation processes and diagnostic technologies has been technically successful with commercial production from the ''marginal'' reservoirs in the first two well tests. The third well test proved downhole-mixing is an efficient process for acid stimulation of a carbonate reservoir that produced oil and gas with 2200 psi bottomhole reservoir pressure, however, subsequent shut-in pressure testing indicated the reservoir was characterized by low-permeability. Realtimezone continues to seek patent protection in foreign markets to the benefit of both RTZ and NETL. Realtimezone and the NETL have licensed the United States patented to Halliburton Energy Services (HES). Ongoing Phase 2 and Phase 3 field-testing continues to confirm applications of both real-time technologies, from well testing conducted over the last 12-month work period and including well test scheduled for year-end of 2002. Technical data transfer to industry is ongoing via Internet tech-transfer, public presentations and industry publications. Final Phase 3 test work will be focused on further field-testing the innovational process of blending stimulation fluids downhole. This system provides a number of advantages in comparison to older industry fracturing techniques and allows the operator to control reservoir fracture propagation and concentrations of proppant placed in the reservoir, in real-time. Another observed advantage is that lower friction pressures result, which results in lower pump treating pressures and safer reservoir hydraulic fracturing jobs.

George Scott III

2002-08-01T23:59:59.000Z

318

Isotopic Tracers for Biogeochemical Processes and Contaminant Transport: Hanford, Washington  

SciTech Connect (OSTI)

Our goal is to use isotopic measurements to understand how contaminants are introduced to and stored in the vadose zone, and what processes control migration from the vadose zone to groundwater and then to surface water. We have been using the Hanford Site in south-central Washington as our field laboratory, and our investigations are often stimulated by observations made as part of the groundwater monitoring program and vadose zone characterization activities. Understanding the transport of contaminants at Hanford is difficult due to the presence of multiple potential sources within small areas, the long history of activities, the range of disposal methods, and the continuing evolution of the hydrological system. Observations often do not conform to simple models, and cannot be adequately understood with standard characterization approaches, even though the characterization activities are quite extensive. One of our objectives is to test the value of adding isotopic techniques to the characterization program, which has the immediate potential benefit of addressing specific remediation issues, but more importantly, it allows us to study fundamental processes at the scale and in the medium where they need to be understood. Here we focus on two recent studies at the waste management area (WMA) T-TX-TY, which relate to the sources and transport histories of vadose zone and groundwater contamination and contaminant fluid-sediment interaction. The WMA-T and WMA-TX-TY tank farms are located within the 200 West Area in the central portion of the Hanford Site (Fig. 2). They present a complicated picture of mixed groundwater plumes of nitrate, {sup 99}Tc, Cr{sup 6+}, carbon tetrachloride, etc. and multiple potential vadose zone sources such as tank leaks and disposal cribs (Fig. 3). To access potential vadose zone sources, we analyzed samples from cores C3832 near tank TX-104 and from C4104 near tank T-106. Tank T-106 was involved in a major event in 1973 in which 435,000 L of high activity waste leaked to the vadose zone over a seven-week period. Other nearby tanks (T-103 and T-101) are also suspected of having leaked or overfilled. Pore water from these cores was analyzed for U and Sr isotopic compositions. Increasing {sup 99}Tc concentration in monitoring well 299-W11-39 (to 27,000 pCi/L in 2005) near the northeast corner of the WMA-T area prompted the emplacement of a series of new wells, 299-W11-25B, W11-45 (down gradient), and W11-47 (Fig. 3), during which depth discrete samples were collected below the groundwater surface. The depth profile from W11-25B revealed high {sup 99}Tc concentrations peaking at 182,000 pCi/L at {approx}10 m below the water table (Dresel et al. 2006). We obtained aliquots for isotopic analysis of groundwater samples produced by purge-and-pump sampling during the drilling of W11-25B, -45 and -47. In addition we have analyzed groundwater samples from monitoring wells in the vicinity of WMA T-TX-TY.

Donald J. DePaolo; John N. Christensen; Mark E. Conrad; and P. Evan Dresel

2007-04-19T23:59:59.000Z

319

Using Biofuel Tracers to Study Alternative Combustion Regimes  

E-Print Network [OSTI]

1979. J.B. Heywood, Internal Combustion Engine Fundamentals.Introduction to Internal Combustion Engines (3rd Edition).Coefficient in the Internal Combustion Engine,” SAE Paper

Mack, John Hunter; Flowers, Daniel L.; Buchholz, Bruce A.; Dibble, Robert W.

2006-01-01T23:59:59.000Z

320

Advancing reactive tracer methods for measuring thermal evolution...  

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

et al. (2003) - Use simplified geometry of hypothetical fracture system - Develop in MATLAB, to allow distribution to industry via the MATLAB compiler * Conducted 2-D finite...

Note: This page contains sample records for the topic "tracer prep blanks" 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

Data Archive of Tracer Experiments and Meteorology Roland R. Draxler  

E-Print Network [OSTI]

to address these issues. In particular there has been consistent emphasis on nuclear reactor accidents since the Chernobyl accident by the International Atomic Energy Agency (IAEA) and the World Meteorological

322

A Tracer Investigation oftheAtmosph^c Dispersion  

E-Print Network [OSTI]

Laboratory Erik Lyck Air Pollution Laboratory National Agency of Environmental Protection Abstract. Mining at Kvanefjeld, Greenland, will result in releases of air polluting gases. In order to measure the dilution and a sea-breeze. INIS-descriptors: AIR POLLUTION; DILUTION; DISPERSION; ENVIRONMENTAL IMPACTS; GASES

323

Giant radio galaxies - II. Tracers of large-scale structure  

E-Print Network [OSTI]

We have carried out optical spectroscopy with the Anglo-Australian Telescope for 24,726 objects surrounding a sample of 19 Giant Radio Galaxies (GRGs) selected to have redshifts in the range 0.05 to 0.15 and projected linear sizes from 0.8 to 3.2 Mpc. Such radio galaxies are ideal candidates to study the Warm-Hot Intergalactic Medium (WHIM) because their radio lobes extend beyond the ISM and halos of their host galaxies, and into the tenuous IGM. We were able to measure redshifts for 9,076 galaxies. Radio imaging of each GRG, including high-sensitivity, wideband radio observations from the Australia Telescope Compact Array for 12 GRGs and host optical spectra (presented in a previous paper, Malarecki et al. 2013), is used in conjunction with the surrounding galaxy redshifts to trace large-scale structure. We find that the mean galaxy number overdensity in volumes of ~700 Mpc$^3$ near the GRG host galaxies is ~70 indicating an overdense but non-virialized environment. A Fourier component analysis is used to qu...

Malarecki, J M; Saripalli, L; Staveley-Smith, L; Subrahmanyan, R

2015-01-01T23:59:59.000Z

324

TRACER DETECTION TECHNOLOGY CORP. PRODUCTS AND SERVICES FOR CORPORATE...  

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

TRANSFER QUESTIONS. Response to Request for Information - Federal Register "The Costs and Benefits of Dealing with Federal Laboratories" This "white paper" is intended to...

325

THE EFFECT OF TRANSVERSE MIXING ON TRACER DISPERSION  

E-Print Network [OSTI]

if steam were to be condensed in the reservoir. A decrease in production is due to the premature, although usually hot by ambient surface standards, is nevertheless colder than the hotter produced fluids

Stanford University

326

Using Biofuel Tracers to Study Alternative Combustion Regimes  

E-Print Network [OSTI]

Simulation of Natural Gas HCCI Combustion: Gas CompositionPeroxide (DTBP) Additive on HCCI Combustion of Fuel BlendsCharge Compression Ignition (HCCI) Engines: Key Research and

Mack, John Hunter; Flowers, Daniel L.; Buchholz, Bruce A.; Dibble, Robert W.

2006-01-01T23:59:59.000Z

327

Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate...  

Open Energy Info (EERE)

stabilities. They were next injected as pulses into the target injection wells. Fluids from the surrounding production wells were then sampled and analyzed in order to...

328

Unraveling DPF Degradation using Chemical Tracers and Opportunities...  

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

Ash Sources Lubricant additives (Zn, Ca, Mg, S, P) Engine wear, corrosion, trace metals in fuels Source: K. Aravelli Courtesy: E. Senzer After only 33,000...

329

HALO ORBITS IN COSMOLOGICAL DISK GALAXIES: TRACERS OF FORMATION HISTORY  

SciTech Connect (OSTI)

We analyze the orbits of stars and dark matter particles in the halo of a disk galaxy formed in a cosmological hydrodynamical simulation. The halo is oblate within the inner {approx}20 kpc and triaxial beyond this radius. About 43% of orbits are short axis tubes-the rest belong to orbit families that characterize triaxial potentials (boxes, long-axis tubes and chaotic orbits), but their shapes are close to axisymmetric. We find no evidence that the self-consistent distribution function of the nearly oblate inner halo is comprised primarily of axisymmetric short-axis tube orbits. Orbits of all families and both types of particles are highly eccentric, with mean eccentricity {approx}> 0.6. We find that randomly selected samples of halo stars show no substructure in 'integrals of motion' space. However, individual accretion events can clearly be identified in plots of metallicity versus formation time. Dynamically young tidal debris is found primarily on a single type of orbit. However, stars associated with older satellites become chaotically mixed during the formation process (possibly due to scattering by the central bulge and disk, and baryonic processes), and appear on all four types of orbits. We find that the tidal debris in cosmological hydrodynamical simulations experiences significantly more chaotic evolution than in collisionless simulations, making it much harder to identify individual progenitors using phase space coordinates alone. However, by combining information on stellar ages and chemical abundances with the orbital properties of halo stars in the underlying self-consistent potential, the identification of progenitors is likely to be possible.

Valluri, Monica [Department of Astronomy, University of Michigan, Ann Arbor, MI 48109 (United States)] [Department of Astronomy, University of Michigan, Ann Arbor, MI 48109 (United States); Debattista, Victor P. [Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE (United Kingdom)] [Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE (United Kingdom); Stinson, Gregory S. [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany)] [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany); Bailin, Jeremy [Department of Physics and Astronomy, University of Alabama, Box 870324, Tuscaloosa, AL 35487-0324 (United States)] [Department of Physics and Astronomy, University of Alabama, Box 870324, Tuscaloosa, AL 35487-0324 (United States); Quinn, Thomas R. [Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195-1580 (United States)] [Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195-1580 (United States); Couchman, H. M. P.; Wadsley, James, E-mail: mvalluri@umich.edu [Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1 (Canada)] [Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1 (Canada)

2013-04-10T23:59:59.000Z

330

Velocity centroids as tracers of the turbulent velocity statistics  

E-Print Network [OSTI]

We use the results of magnetohydrodynamic (MHD) simulations to emulate spectroscopic observations and use maps of centroids to study their statistics. In order to assess under which circumstances the scaling properties of the velocity field can be retrieved from velocity centroids, we compare two point statistics (structure functions and power-spectra) of velocity centroids with those of the underlying velocity field and analytic predictions presented in a previous paper (Lazarian & Esquivel 2003). We tested a criterion for recovering velocity spectral index from velocity centroids derived in our previous work, and propose an approximation of the early criterion using only the variances of ``unnormalized'' velocity centroids and column density maps. It was found that both criteria are necessary, however not sufficient to determine if the centroids recover velocity statistics. Both criteria are well fulfilled for subsonic turbulence. We find that for supersonic turbulence with sonic Mach numbers > 2.5 centroids fail to trace the spectral index of velocity. Asymptotically, however, we claim that recovery of velocity statistics is always possible provided that the density spectrum is steep and the observed inertial range is sufficiently extended. In addition, we show that velocity centroids are useful for anisotropy studies and determining the direction of magnetic field, even if the turbulence is highly supersonic, but only if it is sub-Alfvenic. This provides a tool for mapping the magnetic field direction, and testing whether the turbulence is sub-Alfvenic or super-Alfvenic.

A. Esquivel; A. Lazarian

2005-05-28T23:59:59.000Z

331

Use of Tracers to Characterize Fractures in Engineered Geothermal...  

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

define the subsurface system of fractures and mapping of fluid flow. * limited fracture detection capability * lack of high-temperature monitoring tools and sensors *...

332

Quantum Dot Tracers for Use in Engineered Geothermal Systems  

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

define the subsurface system of fractures and mapping of fluid flow. * limited fracture detection capability * lack of high-temperature monitoring tools and sensors *...

333

Validation of Geothermal Tracer Methods in Highly Constrained...  

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

methods for measuring thermal evolution in CO2-and water-based geothermal reservoirs Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir Quantum Dot...

334

Quantum Dot Tracers for Use in Engineered Geothermal Systems...  

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

nanoparticles(quantum dots)that offer great promise for use in characterizing fracture networks in EGS reservoirs. tracersrosequantumdot.pdf More Documents &...

335

INFORMAL REPORT MULTI-TRACER CONTROL ROOM AIR INLEAKAGE PROTOCOL  

E-Print Network [OSTI]

For discussion with the Nuclear Power Plant Industry January 2002 Research by BNL investigators was performed and tested to handle the unusually large flowrates in a number of HVAC zones in power stations. A review of the plans of a particular nuclear power plant and subsequent simulations of the tagging and sampling results

336

Preferred methods of analysis for chemical tracers in moderate...  

Open Energy Info (EERE)

of contamination or error are discussed in detail. Authors Kroneman, R. L.; Yorgason, K. R.; Moore and J. N. Published DOE Information Bridge, 1211984 DOI 10.21725121460...

337

Perfluorocarbon tracer method for air-infiltration measurements  

DOE Patents [OSTI]

A method of measuring air infiltration rates suitable for use in rooms of homes and buildings comprises the steps of emitting perfluorocarbons in the room to be measured, sampling the air containing the emitted perfluorocarbons over a period of time, and analyzing the samples at a laboratory or other facility.

Dietz, R.N.

1982-09-23T23:59:59.000Z

338

Analysis of Tracer Dispersion During a Prescribed Forest Burn  

E-Print Network [OSTI]

become a method to manage forest health, while preventing uncontrolled wild land fire. Low intensity, prescribed burns release less carbon dioxide than wildfires of the same size and may be used as a strategy. The ultimate goal of the project is to use the data from the burn, along with modeling techniques to improve

Collins, Gary S.

339

Isotopic tracers of gold deposition in Paleozoic limestones, Southern Nevada  

SciTech Connect (OSTI)

Strontium isotopic analyses of barren and mineralized Paleozoic carbonate rocks show that hydrothermal fluids added radiogenic strontium ({sup 87}Sr) to the mineralized zones. At Bare Mountain, samples collected from mineralized areas have {delta}{sup 87}Sr{sub t} values ranging from +3.0 to +23.0, whereas unmineralized carbonate rocks have {delta}{sup 87}Sr, values of {minus}0.6 to +2.9. In other ranges, {delta}{sup 87}Sr, values of the unmineralized carbonate rocks are even lower and virtually indistinguishable from primary marine values. This correlation of elevated {delta}{sup 87}Sr{sub t} values with mineralized zones provides a useful technique for assessing the mineral potential of the Paleozoic basement beneath Yucca Mountain, and may find broader use in mineral exploration in the Basin and Range province as a whole.

Peterman, Z.E.; Widmann, B.L.; Marshall, B.D.; Aleinikoff, J.N.; Futa, K.; Mahan, S.A.

1994-12-31T23:59:59.000Z

340

Using Biofuel Tracers to Study Alternative Combustion Regimes  

E-Print Network [OSTI]

1979. J.B. Heywood, Internal Combustion Engine Fundamentals.Ignition Engine with Optimal Combustion Control. ” US PatentIntroduction to Internal Combustion Engines (3rd Edition).

Mack, John Hunter; Flowers, Daniel L.; Buchholz, Bruce A.; Dibble, Robert W.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Using Biofuel Tracers to Study Alternative Combustion Regimes  

E-Print Network [OSTI]

Simulation of Natural Gas HCCI Combustion: Gas Compositionfor heating the flowing gas. Combustion timing is consideredup. Exhaust gas samples were collected at varying combustion

Mack, John Hunter; Flowers, Daniel L.; Buchholz, Bruce A.; Dibble, Robert W.

2006-01-01T23:59:59.000Z

342

Unraveling DPF Degradation using Chemical Tracers and Opportunities...  

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

stability, and accuracy while incorporating single-cell structures and simple electronics into low-cost designs deer10sappok.pdf More Documents & Publications Key...

343

Verification of Geothermal Tracer Methods in Highly Constrained Field  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov PtyInformation UCOpen EnergyVelankani Group JumpVerdiem Jump

344

Tracer Methods for Characterizing Fracture Stimulation in Enhanced  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyThe EnergyDepartment7 th ,Top Value AddedTotalTown ofTown o

345

A composite tracer analysis approach to reservoir characterization  

E-Print Network [OSTI]

and denominator of Eq. 2.3 and evaluating the integral gives Eqs. 2.5 and 2.6 respectively. 10 e V a VV e aCdveC e e = ? ? ? ? ? ? ? ? ? ? (2.5) () ee V a VV ee VaaCdveVC e e += ? ? ? ? ? ? ? ? ? ? (2.6) Substituting Eqs. 2.5 and 2....6 into 2.3, the expression for the first moment is given below. () ? ? + ++ = e e V e V ee aCdVVC VaaCVdVVC V 0 0 )( )( (2.7) Representing this in a discrete form, Eq. 2.7 can be written as: () ? ? +? ++? = e e V e V ee aCVVC VaaCVVVC V 0 0...

Oyerinde, Adedayo Stephen

2005-11-01T23:59:59.000Z

346

Tracer Testing At Coso Geothermal Area (1993) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs Thermal3)

347

Tracer Testing At Coso Geothermal Area (2004) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs

348

Tracer Testing At Coso Geothermal Area (2006) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs) Jump to:

349

Tracer Testing At East Mesa Geothermal Area (1983) | Open Energy  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs) Jump

350

Tracer Testing At East Mesa Geothermal Area (1984) | Open Energy  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs)

351

Tracer Testing At Raft River Geothermal Area (1983) | Open Energy  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs)2012) |

352

Tracer Testing At Raft River Geothermal Area (1984) | Open Energy  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs)2012)

353

Preferred methods of analysis for chemical tracers in moderate- and  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth'sOklahoma/GeothermalOrangePeru:Job CorpPowerVerde IncStar (07)high-temperature

354

Tracer Methods for Characterizing Fracture Creation in Enhanced Geothermal  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment of EnergyThe Sun and ItsXVIIofPotentialSystems; 2010 Geothermal

355

Geographic Information Systems- Tools For Geotherm Exploration, Tracers  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has beenFfe2fb55-352f-473b-a2dd-50ae8b27f0a6TheoreticalFuelCellGemini SolarAssetsofLane: 2. Jump to:Data

356

Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate Amino  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen,LtdInformation Dixie Valley Geothermal Area (Reed, 2007) JumpG,

357

Tracer testing in geothermal reservoirs | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen,LtdInformation Dixie Valley Geothermal Area (Reed, 2007)testing in

358

Single Well Injection Withdrawl Tracer Tests for Proppant Detection -  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2)Sharing Smart GridShiftMethodSimwYpes(tm)

359

Novel Multidimensional Tracers for Geothermal Inter-Well Diagnostics |  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S iPartnershipEnergy University57Department1|

360

Unraveling DPF Degradation using Chemical Tracers and Opportunities for  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyTheTwo New12.'6/0.2 ...... 13:27 FAX 301O R

Note: This page contains sample records for the topic "tracer prep blanks" 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

Using Biofuel Tracers to Study Alternative Combustion Regimes  

E-Print Network [OSTI]

Internal Combustion Engines The methods described below for tracing fuel component carbon in the emissions

Mack, John Hunter; Flowers, Daniel L.; Buchholz, Bruce A.; Dibble, Robert W.

2006-01-01T23:59:59.000Z

362

Microfluidic Investigation of Tracer Dye Diffusion in Alumina Nanofluids  

E-Print Network [OSTI]

to prepare new refrigerant formulations containing dispersed nanomaterials, including graphene nanosheets, carbon nanotubes and metal oxide and nitride. The influence of key parameters such as particle type, size and volume fraction on the suspension...

Ozturk, Serdar 1979-

2012-10-05T23:59:59.000Z

363

administered cadmium tracer: Topics by E-print Network  

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

G A N D B O H U M I L V Sargassum fluitans biomass was accompanied by the release of hydrogen protons from the biomass. The uptake the overall biosorption rate of cadmium ions in...

364

Voices of Four Taiwanese College Students' Experiences with the Test of English for International Communication (TOEIC) Preparation (PREP) Computer Assisted Language Learning (CALL)  

E-Print Network [OSTI]

preparation course at the university in Taiwan. In the middle and again at the end of students’ test preparation process, the researcher conducted and audio-recorded an approximately 30-minute interview with each of the four participants via Skype. Four themes...

Chen, To-Yu

2014-02-19T23:59:59.000Z

365

Originally presented at Photomask Japan '94, Kanagawa Science Park, April, 1994 Attenuated phase-shifting photomasks fabricated from Cr-based embedded shifter blanks  

E-Print Network [OSTI]

the cathode powers and gas mixture. Cr-based films' flexible properties are suitable for several applications

Rollins, Andrew M.

366

The Effects of Oxygen Plasma on the Chemical Composition and Morphology of the Ru Capping Layer of the Extreme Ultraviolet (EUV) Mask Blanks  

SciTech Connect (OSTI)

Contamination removal from extreme ultraviolet (EUV) mask surfaces is one of the most important aspects to improve reliability for the next generation of EUV lithography. We report chemical and morphological changes of the ruthenium (Ru) mask surface after oxygen plasma treatment using surface sensitive analytical methods: X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and transmission electron microscopy (TEM). Chemical analysis of the EUV masks shows an increase in the subsurface oxygen concentration, Ru oxidation and surface roughness. XPS spectra at various photoelectron takeoff angles suggest that the EUV mask surface was covered with chemisorbed oxygen after oxygen plasma treatment. It is proposed that the Kirkendall effect is the most plausible mechanism that explains the Ru surface oxidation. The etching rate of the Ru capping layer by oxygen plasma was estimated to be 1.5 {+-} 0.2 {angstrom}/min, based on TEM cross sectional analysis.

Belau, Leonid; Park, Jeong Y.; Liang, Ted; Somorjai, Gabor A.

2008-06-07T23:59:59.000Z

367

The Effects of Oxygen Plasma on the Chemical Composition and Morphology of the Ru Capping Layer of the Extreme Ultraviolet (EUV) Mask Blanks  

E-Print Network [OSTI]

P-5B-03 The effects of oxygen plasma on the chemicalRu) mask surface after oxygen plasma treatment using surfacein the subsurface oxygen concentration, Ru oxidation and

Belau, Leonid

2009-01-01T23:59:59.000Z

368

Emergent Control and Planning in an Autonomous Vehicle Lisa Meeden y and Gary McGraw \\Lambday and Douglas Blank y  

E-Print Network [OSTI]

Emergent Control and Planning in an Autonomous Vehicle Lisa Meeden y and Gary McGraw \\Lambday The autonomous vehicle Our robot, called carbot, is a modified toy car (6 \\Theta 9 inches) controlled@cs.indiana.edu Abstract We use a connectionist network trained with rein­ forcement to control both an autonomous robot ve

Indiana University

369

0% 10% 20% 30% 40% 50% Internet (4)  

E-Print Network [OSTI]

Teacher Wheat Ridge CO Launch Education Academic Mentorship/Test Prep Los Angeles CA Robin's Nest Teacher

Doyle, Robert

370

Early consonant/vowel asymmetry: evidence from speech segmentation in French-learning  

E-Print Network [OSTI]

.5/8 months: monosyllabic (Goyet et al. in prep ; Gout, 2001) and bisyllabic words (Polka & Sundara, 2011

Gutkin, Boris

371

Treatment of experimental asthma using a novel peptide inhibitor of the inducible T cell kinase  

E-Print Network [OSTI]

Precipitation small-scale purification and/or concentrationMini Prep small scale (50 µg yield) DNA purification

Guimond, David M.; Guimond, David M.

2012-01-01T23:59:59.000Z

373

A Framework for Distributed Preservation Workflows  

E-Print Network [OSTI]

2), 1746–8256. Hedges,M. ; Hasan, A. ; and Blanke, T. 2007.the iRods system (Hedges, Hasan, and Blanke 2007). Another

Schmidt, Rainer; King, Ross; Steeg, Fabian; Melms, Peter; Jackson, Andrew; Wilson, Carl

2009-01-01T23:59:59.000Z

374

E-Print Network 3.0 - agile alternative binders Sample Search...  

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

in Tailor Welded Blank Forming Summary: . To address tearing concerns, a segmented binder process, which varies the force applied to the materials... in the Tailor Welded Blank,...

375

OhiO State COllege PreP FOrm Instructions for the student --Complete Section 1 and submit the form to your school counselor to complete the remaining sections. This form must be  

E-Print Network [OSTI]

/Calculus, or alternative curriculum as described. College Preparatory Science (with significant laboratory experience) Earth Science, Biology, Chemistry, Physics, etc. College Preparatory Social Studies World History, French, German, Russian, Latin, etc. The Arts Art/Studio Art, Visual Arts, Photography, Cinema, Music

Jones, Michelle

376

Extraplanar Dust: a Tracer of Cold Dense Gas in the Thick Disks of Spiral Galaxies  

E-Print Network [OSTI]

The interstellar thick disks of galaxies contain not only gas, but significant quantities of dust. Most of our knowledge of extraplanar dust in disk galaxies comes from direct broadband optical imaging of these systems, wherein the dust is identified due to the irregular extinction it produces against the thick disk and bulge stars. This observational technique is sensitive to only the most dense material, and we argue much of the material identified in this way traces a cold phase of the interstellar thick disks in galaxies. The presence of a cold, dense phase likely implies the interstellar pressures in the thick disks of spiral galaxies can be quite high. This dense phase of the interstellar medium may also fueling thick disk star formation, and H-alpha observations are now revealing H II regions around newly-formed OB stars associations in several galaxies. We argue that the large quantities of dust and the morphologies of the structures traced by the dust imply that much of the extraplanar material in disk galaxies must have been expelled from the underlying thin disk.

J. Christopher Howk

2004-10-15T23:59:59.000Z

377

The Use of Tracers to Investigate Phosphate Cycling in SoilPlant Systems  

E-Print Network [OSTI]

of available P, excessive P inputs in other agro-ecosystems result in the pollution of surface waters (Frossard), making up virtually 100% of the total P on earth, and seven radioactive isotopes. Only two radioactive are introduced at extremely low rates in natural systems from the atmosphere (Benitez-Nelson and Buesseler 1999

Gilli, Adrian

378

E-Print Network 3.0 - als tracer zur Sample Search Results  

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

Engineering, Reservoir Simulation Research Collection: Fossil Fuels 50 Pathogen and chemical transport in the karst limestone of the Biscayne aquifer Summary: and described by...

379

The use of 3H and O tracers to characterize water inflows  

E-Print Network [OSTI]

(Loetschberg, Gothard, Simplon), and various hydroelectric galleries from large dams (EDF hydroelectric installations in France, the Grande Dixence gallery in Swiss Wallis, hydroelectric galleries in the Aar massif

Paris-Sud XI, Université de

380

Geostatistical inference of hydraulic conductivity and dispersivities from hydraulic heads and tracer data  

E-Print Network [OSTI]

Geostatistical inference of hydraulic conductivity and dispersivities from hydraulic heads; accepted 25 April 2006; published 10 August 2006. [1] In groundwater, hydraulic heads and solute arrival times depend primarily on the hydraulic conductivity field and hydraulic boundary conditions. The spread

Cirpka, Olaf Arie

Note: This page contains sample records for the topic "tracer prep blanks" 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

Motorola's Exhaust Optimization Program: Tracer Gas Application for Gas Panel Enclosures  

E-Print Network [OSTI]

of as high as 70% of manufacturer's specifications per gas enclosure. This approach leads to energy conservation and infrastructure cost avoidance for new exhaust fans, ductwork, abatement equipment, and make-up air systems....

Myart, H. R.; Camacho, R.

382

Comprehensive analysis of metabolic pathways through the combined use of multiple isotopic tracers  

E-Print Network [OSTI]

Metabolic Flux Analysis (MFA) has emerged as a tool of great significance for metabolic engineering and the analysis of human metabolic diseases. An important limitation of MFA, as carried out via stable isotope labeling ...

Antoniewicz, Maciek Robert

2006-01-01T23:59:59.000Z

383

Interpretation, Analysis and Design of Inter-well Tracer Tests in Naturally Fractured Reservoirs  

E-Print Network [OSTI]

of normalized net swept volumes (Sherrod 1012) ............... 69 Figure 4.8 Distribution of normalized net swept volumes (Sherrod 2118) ............... 69 Figure 4.9 Distribution of normalized net swept volumes (Sherrod 2325) ............... 70 Figure 4... for ?Sherrod 701? ................................ 74 Figure 4.19 Normalized swept volume map for ?Sherrod 1301? ............................... 75 Figure 4.20 Normalized swept volume map for ?Sherrod 1012? .............................. 75 Figure 4...

Alramadhan, Aymen Abduljalil

2013-08-19T23:59:59.000Z

384

Radium in the Dead Sea: a possible tracer for the duration of meromixis  

SciTech Connect (OSTI)

Three profiles of /sup 226/Ra in the meromictic Dead Sea measured during 1963-1978 indicate that the radium activities in the upper water mass were higher than in the lower water mass. All three profiles indicate a similar radium inventory. The age of the meromictic structure is estimated by a model which requires that the radium inventory of the lake be at a steady state, that sometime in the past the radium profile of the lake had been uniform and that the contemporaneous profiles of radium have been built up by inflows of radium solely into the upper water mass, while the monimolimnion is relict, isolated, and loses radium only by radioactive decay. Supporting evidence is presented suggesting that the above conditions may be fulfilled.

Stiller, M.; Chung, Y.C.

1984-05-01T23:59:59.000Z

385

Radium in the Dead Sea: a possible tracer for the duration of meromixis  

SciTech Connect (OSTI)

Three profiles of /sup 226/Ra in the meromictic Dead Sea measured during 1963-1978 indicate that the radium activities in the upper water mass were higher than in the lower water mass. All three profiles indicate a similar radium inventory. The Jordan inflow is not the primary source of radium to the Dead Sea. Mineral springs and submerged seepages are probably more important contributors. The age of the meromictic structure is estimated by a model which requires that the radium inventory of the lake be at a steady state, that sometime in the past the radium profile of the lake had been uniform (when either the lake was monomictic or an overturn had ended an earlier meromictic phase) and that the contemporaneous profiles of radium have been built up by inflows of radium solely into the upper water mass, while the monimolimnion is relict, isolated, and loses radium only by radioactive decay. Supporting evidence is presented suggesting that the above conditions may be fulfilled. Thus, it is possible to estimate that the Dead Sea was meromictic for about 300 years before the turnover in 1979. From tentative balances of the Dead Sea dissolved salts it is shown that a previous overturn might have occured at a lower lake level than in 1979.

Stiller, M.; Chung, Y.C.

1984-05-01T23:59:59.000Z

386

Application of multispectral data processing techniques to cholesteric liquid crystal tracer particles  

E-Print Network [OSTI]

color measurement procedures are related to the human visual process. The Munsell System and the CIE System (Commission Internationale de I'Eclairage) describe colors in terms of their appearance or physiological effect. Neither of these systems...

Wilcox, Neal Allen

2012-06-07T23:59:59.000Z

387

Constraining the Parameter Space of the Dark Energy Equation of State Using Alternative Cosmic Tracers  

E-Print Network [OSTI]

We propose to use HII galaxies (HIIG) to trace the redshift-distance relation, by means of their $L(\\mathrm{H}\\beta) - \\sigma$ correlation, in an attempt to constrain the dark energy equation of state parameter solution space, as an alternative to the cosmological use of type Ia supernovae. For a sample of 128 local compact HIIG with high equivalent widths of their Balmer emission lines we obtained ionised gas velocity dispersion from high S/N, high-dispersion spectroscopy (Subaru-HDS and ESO VLT-UVES) and integrated H$\\beta$ fluxes from low dispersion wide aperture spectrophotometry. We find that the $L(\\mathrm{H}\\beta) - \\sigma$ relation is strong and stable against restrictions in the sample. The size of the starforming region is an important second parameter, while adding the emission line equivalent width or the continuum colour and metallicity, produces the solution with the smallest rms scatter. We have used the $L(\\mathrm{H}\\beta) - \\sigma$ relation from a local sample of HIIG and a local calibration ...

Chávez, Ricardo

2014-01-01T23:59:59.000Z

388

Using tracer experiments to determine deep saline aquifers caprocks transport characteristics for carbon dioxide storage  

E-Print Network [OSTI]

for carbon dioxide storage P. Bachaud1,2 , Ph. Berne1 , P. Boulin1,3,4 , F. Renard5,6 , M. Sardin2 , J

Boyer, Edmond

389

E-Print Network 3.0 - aromatic hydrocarbon tracers Sample Search...  

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

S0045-6535(02)00145-5 Summary: Abstract Polycyclic aromatic hydrocarbons (PAHs) and dioxins are lipophilic organic pollutants occurring... absorption, pig INTRODUCTION...

390

Assessment of natural and anthropogenic hydrocarbon inputs using PAHs as tracers.  

E-Print Network [OSTI]

to produce liquid hydrocarbons and water. -- Coal-to-liquids (CTLs) are derived either by pyrolysis of coal authors accept that conventional oil resources are at an advanced stage of depletion and that liquid fuels is a heterogeneous mix of hydrocarbons that remain in liquid phase when extracted to the surface. -- Condensate

391

Off-line algorithm for calculation of vertical tracer transport in the  

E-Print Network [OSTI]

, 3584 CA Utrecht, The Netherlands 4Institute for Marine and Atmospheric Research Utrecht (IMAU), Princetonplein 5, 3584 CC Utrecht, The Nether

392

Multiple-Scale Stabilized Finite Elements for the Simulation of Tracer Injections and Waterflood  

E-Print Network [OSTI]

and Waterflood Ruben Juanes1 , SPE, and Tadeusz W. Patzek1,2 , SPE Copyright 2002, Society of Petroleum Engineers Recovery held in Tulsa, Oklahoma, 13-17 April 2002. This paper was selected for presentation by an SPE) and waterflood (immiscible flow) are 1Civil and Environmental Engineering. U.C. Berkeley. 2Earth Sciences

Patzek, Tadeusz W.

393

Isotopes of helium, hydrogen, and carbon as groundwater tracers in aquifers along the Colorado River  

E-Print Network [OSTI]

hard rock formations and unconsolidated sediments can act asand Cherry, 1979). Unconsolidated deposits, particularlySemi-Pervious Good Unconsolidated Sand & Gravel Consolidated

Haber, Samuel Ainsworth

2009-01-01T23:59:59.000Z

394

Chemical oxygen diffusion coefficient measurement by conductivity relaxation--correlation between tracer diffusion  

E-Print Network [OSTI]

Chemical oxygen diffusion coefficient measurement by conductivity relaxation--correlation between J. P., Grenier J. C., Loup J. P. ABSTRACT Chemical oxygen diusion coecient ¯(D)was measured the oxygen partial pressure in the surrounding atmosphere of the sample. The consequent evolution

Paris-Sud XI, Université de

395

Tracer Studies at Los Alamos 266 Los Alamos Science Number 23 1995  

E-Print Network [OSTI]

from atmospheric nuclear weapons testing. One said, "We've got to stop. We're going to hurt somebody was a problem for children in particular. You see, the radioactive iodine produced by nuclear weapons falls," while the other said, "We can't afford to stop. We need to test if we are going to survive militarily

Massey, Thomas N.

396

Experiments to Evaluate and Implement Passive Tracer Gas Methods to Measure  

E-Print Network [OSTI]

the concentrations of pollutants emitted by indoor sources and brings in pollutants from the outdoors. The air Development Office of Healthy Homes and Lead Hazard Control through Interagency Agreement I-PHI-01070; by the U.S. Environmental Protection Agency Office of Air and Radiation through Interagency Agreement DW-89

397

Brown Carbon Absorption Linked to Organic Mass Tracers in 1 Biomass Burning Particles 2  

E-Print Network [OSTI]

and acetonitrile is assessed. Acetonitrile is 15 a relatively long-lived gas-phase BB these VOCs are strongly correlated with acetonitrile for the two BB plumes sample, Relationship of Benzene, Propene and 1,3-Butadiene with Acetonitrile. 2 3 4

Meskhidze, Nicholas

398

E-Print Network 3.0 - abdominal tracer activity Sample Search...  

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

Fluid Dynamics ECCOMAS CDF 2006 Summary: . Priaux (Eds) TU Delft, Delft The Netherland, 2006 THE INFLUENCE OF ASYMMETRIC INFLOW IN ABDOMINAL AORTIC... of the aneurysmal...

399

Neural network approaches to tracer identification as related to PIV research  

E-Print Network [OSTI]

code ivas capable of extracting, the centroids of all of the syntlie?c spots This network wns tlieu apl&lied to nn &uiage taken fro&n n previous expenment It perfornied as well as a global thresholdrng algor&thm The cellular network was the lenst... elec!inc H wever, tlie pronf given by !Bi?sky ivas nnly for single-laver per. eptrnns, and did nnt apply tc multi-layer network. Several researc!icis, :ca&ca& ivhoni were Ivohouen f'ros)bm" A?dere&?i, aud Hop- f&elcl, niauitaiued their enthusiasui f...

Seeley, Charles Henry

1992-01-01T23:59:59.000Z

400

Tracer Fluid Flow through Porous Media: Theory Applied to Acid Stimulation Treatments in Carbonate Rocks  

E-Print Network [OSTI]

Most carbonate rocks are heterogeneous at multiple length scales. These heterogeneities strongly influence the outcome of the acid stimulation treatments which are routinely performed to improve well productivity. At the pore scale, carbonate rocks...

Zakaria Mohamed Reda, Ahmed

2014-07-29T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

The Critical Density and the Effective Excitation Density of Commonly Observed Molecular Dense Gas Tracers  

E-Print Network [OSTI]

The optically thin critical densities and the effective excitation densities to produce a 1 K km/s (or 0.818 Jy km/s $(\\frac{\

Shirley, Yancy L

2015-01-01T23:59:59.000Z

402

Hydrologic Tracer Studies Conducted August 20 - 25, 1962 Near Cape Thompson, Alaska  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*. . : '* FEB1f\l pGreen6_-_Department ofS

403

Stable nitrogen isotope measurements of marine bacterial proteins and nucleic acids: tracers of microbial activity  

E-Print Network [OSTI]

and nucleic acids from cultures and environmental samples were analyzed to determine if protein []15N reliably reflects whole cell []15N. In batch culture experiments, the net fractionation between Vibrio harveyi and bacterial protein extracts, varied as a...

Kovacs, Jeffrey Paul

1996-01-01T23:59:59.000Z

404

Effects of plasma proteins on the sieving of macromolecular tracers in the kidney  

E-Print Network [OSTI]

The ultrafiltration of plasma in the mammalian glomerulus is the first step in the processing of blood by the kidney. Proper functioning of this process is critical to the kidney's ability to effectively eliminate waste ...

Lazzara, Matthew J

2003-01-01T23:59:59.000Z

405

Uncertainties in Air Exchange using Continuous-Injection, Long-Term Sampling Tracer-Gas Methods  

E-Print Network [OSTI]

Pollutant Control Index: A New Method of Characterizing Ventilation in Commercial Buildings." Proceedings of Indoor Air'

Sherman, Max H.

2014-01-01T23:59:59.000Z

406

Experiments to Evaluate and Implement Passive Tracer Gas Methods to Measure Ventilation Rates in Homes  

E-Print Network [OSTI]

Pollutant Control Index: A New Method of Characterizing Ventilation in Commercial Buildings." Proceedings of Indoor Air'

Lunden, Melissa

2014-01-01T23:59:59.000Z

407

Tracer Recovery and Mixing from Two Geothermal Injection-Backflow Studies |  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs Thermal

408

Tracer Testing At Neal Hot Springs Geothermal Area (U.S. Geothermal Inc.,  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo Aluminium KK Jump to:Springs)2012) | Open

409

USE OF NATURALLY-OCCURRING TRACERS TO MONITOR TWO-PHASE CONDITIONS IN THE  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTagusparkCalculator Jump to: navigation, searchSolomon HighCOSO EGS

410

36Cl as a tracer in geothermal systems- Example from Valles Caldera, New  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 SouthWater Rights, Substantive Jump to:Species | OpenSubjectet14 etMexico |

411

Quantum Dot Tracers for Use in Engineered Geothermal | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L dDepartment of EnergyQualifiedQualityTransfer ofQuantum Dot

412

Effect of Cr2O3 on the O-18 Tracer Incorporation in SOFC Materials. | EMSL  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed NewcatalystNeutronEnvironmentZIRKLE FRUITYear 1MATERIALSTiO2(110). |

413

Advancing Reactive Tracer Methods for Measuring Thermal Evolution in CO2-  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 SouthWaterBrasil Jump to:IowaResource Evaluation And Reservoir Management

414

Tracer Testing At Dixie Valley Geothermal Area (Reed, 2007) | Open Energy  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen,LtdInformation Dixie Valley Geothermal Area (Reed, 2007) Jump to:

415

Tracer Testing At Fenton Hill HDR Geothermal Area (Callahan, 1996) | Open  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen,LtdInformation Dixie Valley Geothermal Area (Reed, 2007) Jump

416

USE OF NATURALLY-OCCURRING TRACERS TO MONITOR TWO-PHASE CONDITIONS...  

Open Energy Info (EERE)

to vapor-dominated. High concentrations of boron are transported to the wellbore in the steam, where it fractionates to the liquid phase flowing in from liquid-dominated feed...

417

1225 Observatory Drive, Madison, Wisconsin 53706 608-262-3581 / www.lafollette.wisc.edu  

E-Print Network [OSTI]

(Blank, 2000; Dixit, 2002; Heinrich and Marschke, 2010). In light of the additional noise and special

Wisconsin at Madison, University of

418

Quantitative analysis of genetic expression responses to dynamic microenvironmental perturbation  

E-Print Network [OSTI]

blank spacer panel, vertical % all other objects dimensionsblank spacer panel, vertical % all other objects dimensions

Pang, Wyming Lee

2007-01-01T23:59:59.000Z

419

Cascadable Absorptive Filter Rev 1.2, 7/21/2014 MMR3 Series U.S. Patent No. 8,392,495, other patents pending  

E-Print Network [OSTI]

Number of Cascaded Sections Number of Parallel Channels (QFN only) (blank) = 1 channel Standard parts

Groppi, Christopher

420

BeamLine Operations and Safety Awareness (BLOSA) Checklist BeamlineX4A All users must be instructed in operating the beamline safely. Leave checkbox blank if not applicable. Training valid 2 years. Visitors use Visitor/Escort forms.  

E-Print Network [OSTI]

, storage, spills, labs, disposal, and transportation of chemicalsChemicals A Cryogen use at beamline or lab: Review filling, demonstrate use, wear PPE (eye and skin protection)Cryogens A Propane liquefaction must be performed in the hoodPropane B Identify location of beamline hazard analysis formHazard Analysis R CLOSE OUT

Ohta, Shigemi

Note: This page contains sample records for the topic "tracer prep blanks" 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

BeamLine Operations and Safety Awareness (BLOSA) Checklist BeamlineX4C All users must be instructed in operating the beamline safely. Leave checkbox blank if not applicable. Training valid 2 years. Visitors use Visitor/Escort forms.  

E-Print Network [OSTI]

, storage, spills, labs, disposal, and transportation of chemicalsChemicals A Cryogen use at beamline or lab: Review filling, demonstrate use, wear PPE (eye and skin protection)Cryogens A Propane liquefaction must be performed in the hoodPropane B Identify location of beamline hazard analysis formHazard Analysis R CLOSE OUT

Ohta, Shigemi

422

11/30/12 11:58 AMQualtrics Survey Software Page 1 of 4https://duke.qualtrics.com/ControlPanel/PopUp.php?PopType=SurveyPrintPreview&WID=_blank  

E-Print Network [OSTI]

11/30/12 11:58 AMQualtrics Survey Software Page 1 of 4https://duke.qualtrics.com/ControlPanel/PopUp.php) #12;11/30/12 11:58 AMQualtrics Survey Software Page 2 of 4https://duke.qualtrics.com/ControlPanel/PopUp.php;11/30/12 11:58 AMQualtrics Survey Software Page 3 of 4https://duke.qualtrics.com/ControlPanel/PopUp.php

423

This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC5207NA27344 Blank template  

E-Print Network [OSTI]

This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore here Title or division here Date 00, 2008 #12;Humankind challenges NIF-1208-15665.ppt 2Moses, FPA, LIFE, 12/03/08 #12;NIF-1208-15665.ppt Moses, FPA, LIFE, 12/03/08 3 Achieving ignition at the NIF can

424

CO_CODE","PLT_CODE","YEAR","MONTH","BLANK1","BOM_DIST","ORIG_ST","MINE_TYPE","BL  

U.S. Energy Information Administration (EIA) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002;5,,"I",86,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0000,7,00000,"WAT","HY"5 Tables July 1996

425

CO_CODE","PLT_CODE","YEAR","MONTH","BLANK1","BOM_DIST","ORIG_ST","MINE_TYPE","BL  

U.S. Energy Information Administration (EIA) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002;5,,"I",86,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0000,7,00000,"WAT","HY"5 Tables July

426

CO_CODE","PLT_CODE","YEAR","MONTH","BLANK1","BOM_DIST","ORIG_ST","MINE_TYPE","BL  

U.S. Energy Information Administration (EIA) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002;5,,"I",86,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0000,7,00000,"WAT","HY"5 Tables

427

Covered Product Category: Commercial Refrigerators and Freezers...  

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

Beer-dispensing and direct draw units Glass frosters Deep well and bunker freezers. Open-air units, deli cases, prep tables, drawer cabinets, laboratory-grade products,...

428

Ca uses o f seaso nal flu c tu atio ns a nd abu n-da nce in shrimp po pul atio ns in the estuaries  

E-Print Network [OSTI]

Qicai fdC(pr..... and conduct a brief sune) 01 the bait shnmfl fisher) In the Lower Laguna \\I"dre In prep

429

Microsoft PowerPoint - EM SSAB Chairs Webinar - (3) Tyborowski...  

Office of Environmental Management (EM)

D&D prep activities Reflects completion of major soil contamination survey Decrease in LBNL funding requirements due to carryover Text in Italics Explanation of major changes...

430

Hanford Site  

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

DrillingHolestoPrepUCanyon.jpg Gallery: U Canyon Grout Title: Drilling Holes for Grout Placement Drilling Holes for Grout Placement Name: Drilling Holes for Grout Placement...

431

ALEKS Placement Test  

E-Print Network [OSTI]

You are strongly encouraged to spend several hours using the ALEKS Prep and Learning Module after your first assessment. Even if you have achieved ...

432

ALEKS Placement Guide  

E-Print Network [OSTI]

You are strongly encouraged to spend several hours using the ALEKS Prep and ... spent in ALEKS will better prepare you for your upcoming course and ...

Stephanie Brown

2014-02-21T23:59:59.000Z

433

E-Print Network 3.0 - altered thalamocortical connectivity Sample...  

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

connectivity Page: << < 1 2 3 4 5 > >> 1 The Functional Influence of Burst and Tonic Firing Mode on Synaptic Interactions in the Thalamus Summary: this prep- aration...

435

January 2014 | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

project contractor Siemens Government Technologies Inc., in signing one of the massive wind turbine blades that will become part of the Pantex Renewable Energy Project (PREP)....

436

Welcome to the inaugural U.S. Department of Energy (DOE) Office  

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

and ways you can become engaged and access funding and techni- cal assistance. Your feedback is welcomed and encouraged Energy Ambassadors Prepping for Deployment DOE's Office...

437

Foundations Jul Aug Nov DecSep Oct Jan Feb May JunMar Apr  

E-Print Network [OSTI]

IV Principal Clinical Experience (PCE): Core Clerkships Advanced Experiences & Scholarly Project IDD Advanced Experiences & Scholarly Project PCE Prep PCE SPS Homeostasis 1 Homeostasis 2 MBBD Pathways to the Profession (ITP) Immunity in Defense and Disease (IDD) SPS PCE Prep Social and Population Sciences: Health

Paulsson, Johan

438

Molecular Gas in Early-type Galaxies  

E-Print Network [OSTI]

to talk science. Jesus Falc´on-Barroso: for the wonderfulmid-IR fluxes from Falc´on-Barroso et al. (2012, in prep).PAH ? 0.57 M yr ?1 (Falc´on-Barroso et al. 2012, in prep) a

Alatalo, Katherine Anne

2012-01-01T23:59:59.000Z

439

OSP WEEKLY FUNDING BULLETIN Volume 4, Issue 13 5 April 2010  

E-Print Network [OSTI]

Research Experience Program (PREP-CSTL) Solicitation No. 2010-PREP-CSTL-01 CFDA No. 11.609 Due Date: 19 to the mission of the CSTL. DEPARTMENT OF DEFENSE (DOD) Transformative Apps Solicitation No. DARPA-BAA-10-41 CFDA-18-PKM CFDA No. 12.800 Due Date: 17 May 2010 http://www07.grants

Alabama in Huntsville, University of

440

Volume 6 Issue 1 January 3, 2012 Open Funding Opportunities  

E-Print Network [OSTI]

Grant Aquaculture Research Program 2012 Solicitation No. NOAA-OAR-SG-2012-2003249 CFDA No. 11.417 Due-NMFS-PIRO-2012-2003230 CFDA No. 11.454 Due Date: 27 February 2012 http://www07.grants Measurement Laboratory (PREP- MML) Solicitation No. 2012-NIST-PREP-MML-01CFDA No. 11.609 Due Date: 13 April

Alabama in Huntsville, University of

Note: This page contains sample records for the topic "tracer prep blanks" 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

Updated by Malana Bey 6/2013 Postbaccalaureate Research Education  

E-Print Network [OSTI]

1 Updated by Malana Bey 6/2013 Postbaccalaureate Research Education Program (PREP) Scholar Handbook Education Program Office of Graduate Education, Ground floor TG-1 CWRU School of Medicine, 10900 Euclid://gradresed.meds.cwru.edu/PREP/index.html #12;2 Updated by Malana Bey 6/2013 Topic Table of Contents Page # Checklist ­ what to do when you

Yang, Sichun

442

Adenylate pool and radiological tracer studies of the metabolism of micro-metazoans of the sulfide system  

E-Print Network [OSTI]

The sulfide biome is the oxygen poor, sulfide rich ecosystem underlying the oxidized layers of most shallow water sea bottoms (Fenchel g Riedl, 1970). The organisms inhabiting this area of low redox potential are termed the "thiobios" (Boaden g Platt, 1971...-300ppm (Fenchel & Riedl, 1970). The transitional boundary between the two zones is termed the redox potential discontinuity or chemocline (Ott & Nachan, 1971). There, oxygen as well as hydrogen sulfide may occur in small amounts. The depth...

Fox, Catherine Alice

2012-06-07T23:59:59.000Z

443

Climate change in the Pacific North America region over the past millennium : development and application of novel geochemical tracers  

E-Print Network [OSTI]

drought in California and Patagonia during mediaeval time.drought in California and Patagonia during mediaeval time.

Roach, Lydia Darcy

2010-01-01T23:59:59.000Z

444

Numerical modeling of elution peak profiles in supercritical fluid chromatography. Part I-Elution of an unretained tracer  

SciTech Connect (OSTI)

When chromatography is carried out with high-density carbon dioxide as the main component of the mobile phase (a method generally known as 'supercritical fluid chromatography' or SFC), the required pressure gradient along the column is moderate. However, this mobile phase is highly compressible and, under certain experimental conditions, its density may decrease significantly along the column. Such an expansion absorbs heat, cooling the column, which absorbs heat from the outside. The resulting heat transfer causes the formation of axial and radial gradients of temperature that may become large under certain conditions. Due to these gradients, the mobile phase velocity and most physico-chemical parameters of the system (viscosity, diffusion coefficients, etc.) are no longer constant throughout the column, resulting in a loss of column efficiency, even at low flow rates. At high flow rates and in serious cases, systematic variations of the retention factors and the separation factors with increasing flow rates and important deformations of the elution profiles of all sample components may occur. The model previously used to account satisfactorily for the effects of the viscous friction heating of the mobile phase in HPLC is adapted here to account for the expansion cooling of the mobile phase in SFC and is applied to the modeling of the elution peak profiles of an unretained compound in SFC. The numerical solution of the combined heat and mass balance equations provides temperature and pressure profiles inside the column, and values of the retention time and efficiency for elution of this unretained compound that are in excellent agreement with independent experimental data.

Kaczmarski, Krzysztof [University of Tennessee and Rzeszow University of Technology, Poland; Guiochon, Georges A [ORNL

2010-01-01T23:59:59.000Z

445

ISOTOPES AS TRACERS OF SOURCES OF LEAD AND STRONTIUM IN AEROSOLS (TSP & PM2.5) IN BEIJING  

E-Print Network [OSTI]

-3687" DOI : 10.1016/j.atmosenv.2010.06.036 #12;ABSTRACT Even after its being phased out in gasoline refining plants are the major source of atmospheric lead, followed by thermal power stations and other coal in gasoline. As a consequence of the phasing-out of Pb, the abundance of Pb in troposphere has decreased world

Paris-Sud XI, Université de

446

A study of the distribution of surface active agent on sand by the use of radioactive tracers  

E-Print Network [OSTI]

that a mass sone movement did not exist. The fatty acid constituents of the surfactant were sepax'ated, as chro- matogz. aphic theory would dictate. This effect was neglected by eazliez workers in this field. The smallez' band. s wax e then moved... employed as chemical additives to the flooding water. Prioz" to the utilization of the theory of adsorption in this work, investigatoz s believed that it was necessary to covex the entire sand surface with the chem- ical in order to efficiently lowex...

Little, Jack Edward

2012-06-07T23:59:59.000Z

447

Rate-limited U(VI) desorption during a small-scale tracer test in a hetereogeneous uranium contaminated aquifer  

E-Print Network [OSTI]

Work Plan for the UMTRA project Old Rifle site, GrandMill Tailings Remedial Action (UMTRA) sites and the Savannahof the contamination at the UMTRA sites lies within shallow

Fox, P.M.

2013-01-01T23:59:59.000Z

448

Global budgets of oceanic and atmospheric methyl iodide: development of methyl iodide as a tracer for marine convection  

E-Print Network [OSTI]

), wetlands (7 Gg yr \\Gamma1 ) and wood fuel (3 Gg yr \\Gamma1 ) are also included in the model. A global

Jacob, Daniel J.

449

Association of Biomarkers of Systemic Inflammation with Organic Components and Source Tracers in Quasi-Ultrafine Particles  

E-Print Network [OSTI]

2006. Health effects of fine particu- late air pollution:air pollution in ischemic heart disease patients. Environ Healthair pollution in elderly subjects with a his- tory of coronary artery disease. Environ Health

2010-01-01T23:59:59.000Z

450

Validation of the BERT Point Source Inversion Scheme Using the Joint Urban 2003 Tracer Experiment Dataset - Final Report  

SciTech Connect (OSTI)

A terrorist attack in a U.S. city utilizing biological weapons could have severe consequences. A biological agent could be aerosolized and emitted into the air in the middle of a city, invisibly traveling with the winds, and dosing an unknowing populace. The magnitude of the problem would only be revealed as sick people started arriving several days later at hospitals with symptoms, many already too ill to be saved. A national program has deployed a network of biological agent collectors in U.S. cities to provide early detection of a bio-weapon attack, thereby hastening medical intervention and potentially saving many thousands of lives. In fact, the most effective treatment takes place prior to infection or in its early stages and early warning might reduce the disease progression and, consequently, the possibility of an outbreak. If a biological attack were to occur in a city, one or more collectors may register hits with specific dosages and the city would be alerted that an attack had taken place. This piece of information alone, however, would not be enough to determine how serious the attack was, i.e., how much biological agent was released into the air and where the bio-plume traveled. The first responders and public health communities will want to know what regions were impacted, how many persons might get sick, which people most need medical supplies, and where to clean up. The law enforcement community will want to look for forensic evidence at the release location. The Bio-Agent Event Reconstruction Tool (BERT) has been developed in order to recreate what might have happened during an airborne biological agent attack based on biological agent collector measurements and wind collectors mounted around a city. The tool can be used to estimate possible release areas while eliminating other areas, and can estimate bounds on the amount of material released. The tool can then be used to project forward from the possible source areas to estimate potential hazard zones. Due to a unique source inversion technique - called the upwind collector footprint approach - the tool runs fast and the source regions can be determined in a few minutes. In this report, we provide an overview of the BERT framework, followed by a description of the source inversion technique. The Joint URBAN 2003 field experiment held in Oklahoma City that was used to validate BERT is then described. Subsequent sections describe the metrics used for evaluation, the comparison of the experimental data and BERT output, and under what conditions the BERT tool succeeds and performs poorly. Results are aggregated in different ways (e.g., daytime vs. nighttime releases, 1 vs. 2 vs. 3 hit collectors) to determine if BERT shows any systematic errors. Finally, recommendations are given for how to improve the code and procedures for optimizing performance in operational mode.

Brambilla, Sara [Los Alamos National Laboratory; Brown, Michael J. [Los Alamos National Laboratory

2012-06-18T23:59:59.000Z

451

129 Iodine: A New Hydrologic Tracer for Aquifer Recharge Conditions Influenced by River Flow Rate and Evapotranspiration  

E-Print Network [OSTI]

analogy to chloride ? Long term database Chloride: Analogy for Iodide y = 5.27x -0.32 R 2 = 0.53 R = 0.73 0 1 2 3 4 5 6 0 20 40 60 80 100 120 SARPD Monthly Flow m 3 s -1 S ARP D [ C l - ] m e q / L Monthly values INSET: Annual median values.... GW y = 0.46x + 1.27 R 2 = 0.96 -2 -1 0 1 2 -3 -2 -1 0 log [Cl - GW ] or log [Cl - SARPD ] meq/L lo g [ C l - PP T ] m e q/ L ...

Schwehr, K. A.; Santschi, P. H.; Moran, J. E.

2003-01-01T23:59:59.000Z

452

Geochemical tracers of processes affecting the formation of seafloor hydrothermal fluids and deposits in the Manus back-arc basin  

E-Print Network [OSTI]

Systematic differences in trace element compositions (rare earth element (REE), heavy metal, metalloid concentrations) of seafloor vent fluids and related deposits from hydrothermal systems in the Manus back-arc basin ...

Craddock, Paul R

2009-01-01T23:59:59.000Z

453

Feasibility of a Perfluorocarbon tracer based network to support Monitoring, Verification, and Accounting of Sequestered CO2  

E-Print Network [OSTI]

, and Accounting of Sequestered CO2 Thomas B. Watson* and Terrence Sullivan Brookhaven National Laboratory, Upton% of total sequestered CO2 over the lifetime of the reservoir. This is 0.001% per year for a 1000 year lifetime of a storage reservoir. Effective detection of CO2 leaks at the surface may require incorporation

Johnson, Peter D.

454

Climate change in the Pacific North America region over the past millennium : development and application of novel geochemical tracers  

E-Print Network [OSTI]

2003) North Pacific intermediate water response to a moderndecadal changes in intermediate water masses a signature offrom tree rings. J. Amer. Water Res. Assoc. Mestas-Nuñez,

Roach, Lydia Darcy

2010-01-01T23:59:59.000Z

455

The Post-Shock Chemical Lifetimes of Outflow Tracers and a Possible New Mechanism to Produce Water Ice Mantles  

E-Print Network [OSTI]

We have used a coupled time-dependent chemical and dynamical model to investigate the lifetime of the chemical legacy left in the wake of C-type shocks. We concentrate this study on the chemistry of H2O and O2, two molecules which are predicted to have abundances that are significantly affected in shock-heated gas. Two models are presented: (1) a three-stage model of pre-shock, shocked, and post-shock gas; and (2) a Monte-Carlo cloud simulation where we explore the effects of stochastic shock activity on molecular gas over a cloud lifetime. In agreement with previous studies, we find that shock velocities in excess of 10 km s^-1 are required to convert all of the oxygen not locked in CO into H2O before the gas has an opportunity to cool. For pure gas-phase models the lifetime of the high water abundances, or ``H2O legacy'', in the post-shock gas is 4 - 7 x 10^5 years. Through the Monte Carlo cloud simulation we demonstrate that the time-average abundance of H2O is a sensitive function of the frequency of shoc...

Bergin, E A; Neufeld, D A; Bergin, Edwin A.; Melnick, Gary J.; Neufeld, David A.

1998-01-01T23:59:59.000Z

456

J Nucl Med . Author manuscript Impact of tumor size and tracer uptake heterogeneity in (18)F-FDG PET and  

E-Print Network [OSTI]

in (18)F-FDG PET and CT non-small cell lung cancer tumor delineation Mathieu Hatt 1 * , Catherine Cheze@univ-brest.fr > Abstract The objectives of this study were to investigate the relationship between CT and 18F-FDG PET based tumor volumes in NSCLC and the impact of tumor size and uptake heterogeneity on various PET uptake

Paris-Sud XI, Université de

457

Tracer testing using naphthalene disulfonate compounds at Soultz-sous-Forts (France) 1 EC Contract ENK5-2000-00301  

E-Print Network [OSTI]

- Location map and profiles of the geothermal wells (from Gentier et al., 2003a and b). Figure 2b - Geological cross-section between the geothermal wells (from Gentier et al., 2003b). The hot fluid produced

Paris-Sud XI, Université de

458

Sources of organic aerosol investigated using organic compounds as tracers measured during CalNex in Bakersfield  

E-Print Network [OSTI]

to be mainly through gas-to-particle condensation of gas-phase oxidation products during the day. Our results) and provide insights into secondary organic aerosol (SOA) formation, positive matrix factorization analysis in the afternoon. Although contributions to SOA from oxidation of biogenic gas-phase compounds were less

Cohen, Ronald C.

459

Tracer Methods for Characterizing Fracture Creation in Enhanced Geothermal Systems; 2010 Geothermal Technology Program Peer Review Report  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyThe EnergyDepartment7 th ,Top Value AddedTotalTown ofTown o f5

460

Biased swimming cells do not disperse in pipes as tracers: A population model based on microscale behaviour  

E-Print Network [OSTI]

mask Biomicrofluidics 5, 022204 (2011) Analytical solution on Magnus wind turbine power performance based on the blade element momentum theory J. Renewable Sustainable Energy 3, 033104 (2011) Additional, or the exchange of genetic material. This can significantly impact the behaviour of suspensions of swimming micro

Bearon, Rachel

Note: This page contains sample records for the topic "tracer prep blanks" 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.


461

Rate-limited U(VI) desorption during a small-scale tracer test in a hetereogeneous uranium contaminated aquifer  

E-Print Network [OSTI]

of Contaminants in the Hanford Vadose Zone, Vadose Zone J. ,transport in a contaminated Hanford sediment, Environ. Sci.of U(VI) observed in Hanford sediment column experiments. A

Fox, P.M.

2013-01-01T23:59:59.000Z

462

Water quality studies in Kranji Catchment, Singapore : use of organic tracer and PEDs for identifying potential sewage sources  

E-Print Network [OSTI]

The objective of this study was to identify organic compounds that could serve as indicators of potential human fecal contamination sources to the Kranji Reservoir in Singapore that could be used as confirmation indicators ...

Mendez Sagel, Adriana (Adriana Raquel)

2010-01-01T23:59:59.000Z

463

Radionuclides as natural tracers for the characterization of fluids in regional discharge areas, Buda Thermal Karst, Hungary  

E-Print Network [OSTI]

, Nico Goldscheider d , Anita Ã?. Csoma e,1 a Department of Physical and Applied Geology, Institute used uranium, radium and radon to identify mixing of fluids in the Buda Thermal Karst system for the waters. In this study we showed that uranium, radium and radon naturally occurring in groundwater can

Horváth, Ákos

464

A Hybrid Ray Tracer for Rendering Polygon and Volume Data Marc Levoy, University of North Carolina at Chapel Hill  

E-Print Network [OSTI]

­by­sample method of Westover [23], and the ray tracing methods of Levoy [12], Sabella [21], and Upson and Keeler

Stanford University

465

Mass-dependent fractionation of quadruple stable sulfur isotope system as a new tracer of sulfur biogeochemical cycles  

E-Print Network [OSTI]

- ing rare isotopes for Earth materials was the discovery of anomalous 17 O abundance in a wide variety, USA b Department of Geology and Earth System Science Interdisciplinary Center, University of Maryland and extraterrestrial materials. Ã? 2006 Elsevier Inc. All rights reserved. 1. Introduction Sulfur (32 S, 33 S, 34 S

Long, Bernard

466

Climate change in the Pacific North America region over the past millennium : development and application of novel geochemical tracers  

E-Print Network [OSTI]

Freeze and Bolivia cores ………………………………………………………………………….. 209Lake indicating locations of Bolivia cores and Freeze corescore descriptions of Bolivia cores SL0701 (a), SL0702 (b),

Roach, Lydia Darcy

2010-01-01T23:59:59.000Z

467

SFSU Undergraduate Academic Standing Petition (ASP) Last Name: First Name: SFSU ID#  

E-Print Network [OSTI]

TRANSCRIPT, DARS and/or ASE. Use your unofficial transcript and GPA Calculator to fill in the blanks below

468

216-Day report for Tank 241-C-111, cores 58 and 59  

SciTech Connect (OSTI)

Three core samples from tank C-111, and a field blank, were received by the 222-S laboratories. Cores 58, 59, and the field blank were analyzed in accordance with plans. A hot cell blank was analyzed at the direction of the hot cell chemist. No sample results exceeded the notification limits. Core 60 was not analyzed.

Rice, A.D.

1994-12-05T23:59:59.000Z

469

Analytical Services Mass Spec. Analysis LC/MS and LC/MS/MS Sample Submission Form  

E-Print Network [OSTI]

the analysis. · Label all samples clearly with your name, date and the sample's ID. · You are responsible to this form! Desired Priority: [ ] Standard [ ] Rush Priority Ionization type: [ ] ESI (+) [ ] ESI only #Samples: ____ Priority: ____ #MSn : ____ Sample ID: ____ #Prep: ____ Receive date

Crawford, T. Daniel

470

Hanford Site  

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

prep for lift 2-18-11.jpg Gallery: 200 West Pump and Treat Title: Preparing to lift tank Preparing to lift tank Name: Preparing to lift tank Document Date: 02212011 Keywords: 200...

471

PAGE Northerns for MicroRNAs Updated April, 2007 Bartel Lab  

E-Print Network [OSTI]

, and resuspend the pellet in 25 l and scintillation count. Mix a stock of marker with as high a specific activity) for quality of RNA prep and for visual loading control. Take digital snapshot on Gel Doc and save image

Bartel, David

472

Join us for the 100th anniversary of the partnership of the Boy Scouts and the LDS Church. To celebrate we will be  

E-Print Network [OSTI]

. To celebrate we will be having a special opening ceremony on March 16! BYU Spring Merit Badge PowWow 2013 Crime Prevention Emergency Prep Engineering/Energy Entrepreneurship First Aid Forestry Geocaching

Martinez, Tony R.

473

http://occr.christiantimes.org.hk/art_0123.htm 1 Christianity and Culture  

E-Print Network [OSTI]

http://occr.christiantimes.org.hk/art_0123.htm 1 Christianity and Culture Jerry Solomon Jerry Solomon field ministries Probe Ministries "Mind Games" College Prep Criswell College University measurement, statistics and methodological studies Cisco Systems PDF PDF html

Yu, Alex

474

SM T W T F S SM T W T F S,  

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

Rhode Island Savannah River Trip Prep i (Secretary's Conference Room) | Mtg. wVin Weber & Tim Morrison: Citizens for Real Energy Soli McMonigle, Joe 193 , '2OwO: IAUBust...

475

Recommendations for Improvement of RMP Sediment Monitoring  

E-Print Network [OSTI]

, OR Prepared For Regional Monitoring Program for Trace Substances San Francisco Estuary Institute 1325 S. 46th in the Atlas of Sediment Contamination, Toxicity, and Benthic Assemblages (Thompson and Daum, in prep.). #12

476

E-Print Network 3.0 - atheriniformes atherinopsidae na Sample...  

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

(RS; bp), number of alleles (NA), average observed heterozygosity (HO), and average FIS and FST... This study Primer Sequence (5-3; Feldheim et al. in prep.) TA (C) RN RS...

477

Page 1 of 2 Radiogram No. 8657nu Form 24 for 03/11/2012 (Updated)  

E-Print Network [OSTI]

Supply System (SVO), POTOK Air Purification System Data Calldowns 15:15-16:05 FE-5 ICV Monitoring Prep 15 Progress 414 Section 1 (terminate) 14:05-14:45 FE-2 Maintenance. SM and FGB Flush Counter (), Water

478

TheChandraViewofRadiativeandKineticEnergyDissipationinAGN Dan Evans (MIT Kavli Institute / Harvard University), Julia Lee (Harvard), Jane Turner  

E-Print Network [OSTI]

jets are launched? Are there intrinsic differences in the accretion process? m LX #12;The-ks HETG GTO observation (PI Canizares) just performed (Evans et al., in prep.) Ogleetal.(2003) 20

Evans, Dan

479

On the Evolution of Massive Galaxies  

E-Print Network [OSTI]

MNRAS, 386, 577 Falc´on-Barroso, J. et al. 2004, MNRAS, 350,home to me. Jes´ us Falc´on Barroso deserves special mentionoptical colors (Falc´on-Barroso et al. in prep). These star-

Shapiro, Kristen Leah

2010-01-01T23:59:59.000Z

480

adolescent supplement ncs-a: Topics by E-print Network  

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

Websites Summary: was purified on HPLC (semi-prep C18 reverse phase column, 15% acetonitrile-30% acetonitrile for 20 min for validation of SUV technique. Optical SUV values...

Note: This page contains sample records for the topic "tracer prep blanks" 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.


481

adolescent ncs-a supplement: Topics by E-print Network  

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

Websites Summary: was purified on HPLC (semi-prep C18 reverse phase column, 15% acetonitrile-30% acetonitrile for 20 min for validation of SUV technique. Optical SUV values...

482

PowerPoint Presentation  

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

* No cold or centrifugation steps * Power draw is minimal RNA Prep Module: Digital Microfluidics (DMF) with Macro-to-Micro Fluidic Interface Jebrail MJ et al., Anal Chem 86:3856...

483

E-Print Network 3.0 - ash washing experiments Sample Search Results  

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

Std. Dev. type prep . calc.b "out" (m%,d) (m... of the total chlorine in the ash, condensate (from collector ... Source: Columbia University - Waste-to-Energy Research and...

484

Work Authorization Document NSTX Upgrade Project  

E-Print Network [OSTI]

AUG14 01AUG14 0 41 1,094,172.40 0.00 0.00 Design 24200020 PDR Prep PPL 26 17MAY10A 17MAY10A 22JUN10A.00 0.00 24200059 Peer Review 0 31MAR11 14APR11A -10 0.00 0.00 0.00 24200060 FDR Prep PPL 24* 17MAY11 16

Princeton Plasma Physics Laboratory

485

Page 1 of 3 Radiogram No. 8449u Form 24 for 02/15/2012  

E-Print Network [OSTI]

SM [Caution & Warning Panel] Test 06:00-06:10 FE-6 BCAT Nikon D2Xs Battery Changeout 06 Prep 07:55-08:15 FE-1, FE-2, FE-4, FE-5, FE-6 Work Prep 08:05-08:15 CDR D2XS Battery Charge 08 Final Stow 12:00-12:35 FE-5 Water Microbiology Kit (WMK) - in-flight water processing 12:00-12:10 FE-6

Waliser, Duane E.

486

Development of an Optimum Tracer Set for Apportioning Emissions of Individual Power Plants Using Highly Time-Resolved Measurements and Advanced Receptor Modeling  

SciTech Connect (OSTI)

In previous studies, 11 elements (Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se, and Zn) were determined in 30-minute aerosol samples collected with the University of Maryland Semicontinuous Elements in Aerosol Sampler (SEAS; Kidwell and Ondov, 2001, 2004; SEAS-II) in several locations in which air quality is influenced by emissions from coal- or oil-fired power plants. At this time resolution, plumes from stationary high temperature combustion sources are readily detected as large excursions in ambient concentrations of elements emitted by these sources (Pancras et al. ). Moreover, the time-series data contain intrinsic information on the lateral diffusion of the plume (e.g., {sigma}{sub y}), which Park et al. (2005 and 2006) have exploited in their Pseudo-Deterministic Receptor Model (PDRM), to calculate emission rates of SO{sub 2} and 11 elements (mentioned above) from four individual coal- and oil-fired power plants in the Tampa Bay area. In the current project, we proposed that the resolving power of source apportionment methods might be improved by expanding the set of maker species and that there exist some optimum set of marker species that could be used. The ultimate goal was to determine the utility of using additional elements to better identify and isolate contributions of individual power plants to ambient levels of PM and its constituents. And, having achieved better resolution, achieve, also, better emission rate estimates. In this study, we optimized sample preparation and instrumental protocols for simultaneous analysis of 28 elements in dilute slurry samples collected with the SEAS with a new state-of-the-art Thermo-Systems, Inc., X-series II, Inductively Coupled Plasma Mass Spectroscopy (ICP-MS), and reanalyzed the samples previously collected in Tampa during the modeling period studied by Park et al. (2005) in which emission rates from four coal- and oil-fired power plants affected air quality at the sampling site. In the original model, Park et al. (2005), included 6 sources. Herein, we reassessed the number of contributing sources in light of the new data. A comprehensive list of sources was prepared and both our Gaussian Plume model and PMF were used to identify and predict the relative strengths of source contributions at the receptor sites. Additionally, PDRM was modified to apply National Inventory Emissions, Toxic Release Inventory, and Chemical Mass Balance source profile data to further constrain solutions. Both the original Tampa data set (SO{sub 2} plus 11 elements) and the new expanded data set (SO{sub 2} plus 23 elements) were used to resolve the contributions of particle constituents and PM to sources using Positive Matrix Factorization (PMF) and PDRM.

John Ondov; Gregory Beachley

2007-07-05T23:59:59.000Z

487

CDIAC -WHPO/CCHDO Data Management Plan for CTD/Hydrographic/CO2/Tracer Data for the Global Ocean Carbon and  

E-Print Network [OSTI]

Carbon and Repeat Hydrography Program Alex Kozyr Carbon Dioxide Information Analysis Center Environmental://cdiac.esd.ornl.gov/oceans/home.html James H. Swift WOCE Hydrographic Program Office (CLIVAR and Carbon Hydrographic Data Office) UCSD oceanographic research depends on the availability and clarity of existing data. Two data offices in the US deal

488

Stirring and mixing of biologically reactive tracers K. J. Richards, S. J. Brentnall, P. McLeod, and A. P. Martin  

E-Print Network [OSTI]

and fluid flow Fluid flow can impact on the marine ecological sys- tem in two distinct ways: (a) through incorpo- rated into models of climate change to predict global warming scenarios (see, e.g., it Cox et al models the marine ecological system is a matter of debate. There is s

Cambridge, University of

489

Natural Tracers and Multi-Scale Assessment of Caprock Sealing Behavior: A Case Study of the Kirtland Formation, San Juan Basin  

SciTech Connect (OSTI)

The assessment of caprocks for geologic CO{sub 2} storage is a multi-scale endeavor. Investigation of a regional caprock - the Kirtland Formation, San Juan Basin, USA - at the pore-network scale indicates high capillary sealing capacity and low permeabilities. Core and wellscale data, however, indicate a potential seal bypass system as evidenced by multiple mineralized fractures and methane gas saturations within the caprock. Our interpretation of {sup 4}He concentrations, measured at the top and bottom of the caprock, suggests low fluid fluxes through the caprock: (1) Of the total {sup 4}He produced in situ (i.e., at the locations of sampling) by uranium and thorium decay since deposition of the Kirtland Formation, a large portion still resides in the pore fluids. (2) Simple advection-only and advection-diffusion models, using the measured {sup 4}He concentrations, indicate low permeability ({approx}10-20 m{sup 2} or lower) for the thickness of the Kirtland Formation. These findings, however, do not guarantee the lack of a large-scale bypass system. The measured data, located near the boundary conditions of the models (i.e., the overlying and underlying aquifers), limit our testing of conceptual models and the sensitivity of model parameterization. Thus, we suggest approaches for future studies to better assess the presence or lack of a seal bypass system at this particular site and for other sites in general.

Jason Heath; Brian McPherson; Thomas Dewers

2011-03-15T23:59:59.000Z

490

Fluid origins, paths, and fluid-rock reactions at convergent margins, using halogens, Cl stable isotopes, and alkali metals as geochemical tracers  

E-Print Network [OSTI]

range kg/yr Cl sources and sinks Water or rock mass mol/kgtemperature at the source of fluid-rock reactions, asto identify the fluid-rock reactions at source. In addition,

Wei, Wei

2007-01-01T23:59:59.000Z

491

Investigating groundwater and surface water interactions using novel isotopes and geochemical tracers in the upper Merced River Basin, Sierra Nevada, California  

E-Print Network [OSTI]

Tubbs, and H. E. Gove, Thermonuclear 36 Cl pulse in naturalTubbs, and H. E. Gove, Thermonuclear 36 Cl pulse in naturalfrom above-ground thermonuclear weapons testing, similar to

Shaw, Glenn David

2009-01-01T23:59:59.000Z

492

Investigating groundwater and surface water interactions using novel isotopes and geochemical tracers in the upper Merced River Basin, Sierra Nevada, California  

E-Print Network [OSTI]

48 Measured electrical conductivity vs. predicted electricalFigure 2.8: Measured electrical conductivity vs. predicted

Shaw, Glenn David

2009-01-01T23:59:59.000Z

493

Investigating groundwater and surface water interactions using novel isotopes and geochemical tracers in the upper Merced River Basin, Sierra Nevada, California  

E-Print Network [OSTI]

collected in 125 HDPE plastic bottles, stored at 4 C°, and?D. One liter HDPE plastic bottles were used for collection2005, and 1 L HDPE plastic bottles, with PERAFILM sealing

Shaw, Glenn David

2009-01-01T23:59:59.000Z

494

Investigating groundwater and surface water interactions using novel isotopes and geochemical tracers in the upper Merced River Basin, Sierra Nevada, California  

E-Print Network [OSTI]

throughout Yosemite Valley from Happy Isles to Pohonowithin Yosemite Valley shows that Happy Isles and Bridalveilto Yosemite Valley is plausible because Happy Isles Spring

Shaw, Glenn David

2009-01-01T23:59:59.000Z

495

Version finale avant publication. Parue in Bonnaud, L. et Joly, N., (eds), Alimentation sous contrle. Tracer, auditer, conseiller, Quae/INRA, 2012, pp.43-59  

E-Print Network [OSTI]

chapitre propose d'explorer le travail ordinaire de ces derniers : à quels impératifs doivent-ils répondre ? Quels problèmes concrets rencontrent-ils ? Qu'est-ce que ce détour par les activités de contrôle nous apprend t-il sur les relations des exploitants avec les contraintes de la traçabilité alimentaire ? Qu'il

Boyer, Edmond

496

CO2 isotopes as tracers of firn air diffusion and age in an Arctic ice cap with summer melting, Devon Island, Canada  

E-Print Network [OSTI]

and the effects of summer melting. The 14 CO2 profile from the permeable firn includes the 1963 thermonuclear peak, and accumulation rates were calibrated with the depth of the 1963 thermonuclear 3 H peak. The average ages for CO2 and the ice matrix. Calibrated with the 1963 peak for thermonuclear 14 CO2, a 21.2-year reaction halftime

Chappellaz, Jérôme

497

Groundwater prospecting for sandstone-type uranium deposits: the merits of mineral-solution equilibria versus single element tracer methods. Volume II  

SciTech Connect (OSTI)

This report presents the results of further research on the groundwater geochemistry of 96 well waters in two uraniferous aquifers in Texas and Wyoming, and is a continuation of the work presented by Chatham et al. (1981). In this study variations in concentrations of U, As, Mo, Se and V were compared with the saturation state of the groundwater with respect to mineral phases of these elements known or expected to occur in each area. The non-radiogenic trace elements exhibited strong redox dependence consistent with thermodynamic predictions, but their variations did not pinpoint existing uranium ore bodies, because of a shift in groundwater flow patterns since the time of ore emplacement. Saturation levels of trace element minerals such as realgar, native Se, and molybdenite showed broad anomalies around the ore-bearing areas, similar to patterns found for U minerals by Langmuir and Chatham (1980), and Chatham et al. (1981). The radiogenic elements Ra and Rn showed significant anomalies directly within the ore zones. Helium anomalies were displaced in the direction of groundwater flow, but by their magnitude and areal extent provided strong evidence for the existence of nearby uranium accumulations. Uranium isotope ratios showed no systematic variations within the two aquifers studied. Saturation maps for kaolinite, illite, montmorillonite and the zeolites analcime and clinoptilolite provided 1 to 2 km anomalies around the ore at the Texas site. Saturation values for the gangue minerals pyrite and calcite defined the redox interface and often suggested the position of probable uranium mineralization. When properly used, the groundwater geochemical concepts for exploration can accurately pinpoint uranium mineralization at a fraction of the cost of conventional methods that involve test drilling and geophysical and core logging.

Wanty, R.B.; Langmuir, D.; Chatham, J.R.

1981-08-01T23:59:59.000Z

498

Investigating groundwater and surface water interactions using novel isotopes and geochemical tracers in the upper Merced River Basin, Sierra Nevada, California  

E-Print Network [OSTI]

weapons’ test fallout still cycling in the atmosphere? , Nuclearweapons’ test fallout still cycling in the atmosphere? , Nuclear

Shaw, Glenn David

2009-01-01T23:59:59.000Z

499

The Proton Transfer Reaction-Mass Spectrometer for Atmospheric Chemistry Tracers of Diesel Exhaust Emissions and Measurements of Trace gas and Aerosol properties.  

E-Print Network [OSTI]

, for it was dependent upon their polarity and the required heat supply for sufficient signals. The pipeline required

Collins, Gary S.

500

Seal for fluid forming tools  

DOE Patents [OSTI]

An electro-hydraulic forming tool for forming a sheet metal blank in a one-sided die has first and second rigid rings that engage opposite sides of a sheet metal blank. The rigid rings are contained within slots on a die portion and a hydraulic force applicator portion of the forming tool. The seals are either resiliently biased by an elastomeric member or inherently resiliently biased into contact with the blank.

Golovashchenko, Sergey Fedorovich (Beverly Hills, MI); Bonnen, John Joseph Francis (Milford, MI)

2012-03-20T23:59:59.000Z