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Title: Geotechnical characterization of the North Ramp of the Exploratory Studies Facility: Yucca Mountain Site Characterization Project. Volume 1, Data summary

Abstract

This report presents the results of geological and geotechnical characterization of the Miocene volcanic tuff rocks of the Timber Mountain and Paintbrush groups that the tunnel boring machine will encounter during excavation of the Exploratory Studies Facility (ESF) North Ramp. The is being constructed by the DOE as part of the Yucca Mountain Project site characterization activities. The purpose of these activities is to evaluate the feasibility of locating a potential high-level nuclear waste repository on lands adjacent to the Nevada Test Site, Nye County, Nevada. This report was prepared as part of the Soil and Rock Properties Studies in accordance with the 8.3.1.14.2 Study Plan. This report is volume 1 of the data summary.

Authors:
; ;  [1];  [2]
  1. Agapito Associates, Inc., Grand Junction, CO (United States)
  2. Sandia National Labs., Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
88830
Report Number(s):
SAND-95-0488/1
ON: DE95015011; TRN: 95:017775
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: May 1995
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; 54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; TUFF; GEOLOGY; HIGH-LEVEL RADIOACTIVE WASTES; UNDERGROUND DISPOSAL; SOILS; MECHANICAL PROPERTIES; ROCKS; YUCCA MOUNTAIN; BOREHOLES; COMPILED DATA; Yucca Mountain Project

Citation Formats

Brechtel, C.E., Lin, Ming, Martin, E., and Kessel, D.S. Geotechnical characterization of the North Ramp of the Exploratory Studies Facility: Yucca Mountain Site Characterization Project. Volume 1, Data summary. United States: N. p., 1995. Web. doi:10.2172/88830.
Brechtel, C.E., Lin, Ming, Martin, E., & Kessel, D.S. Geotechnical characterization of the North Ramp of the Exploratory Studies Facility: Yucca Mountain Site Characterization Project. Volume 1, Data summary. United States. doi:10.2172/88830.
Brechtel, C.E., Lin, Ming, Martin, E., and Kessel, D.S. Mon . "Geotechnical characterization of the North Ramp of the Exploratory Studies Facility: Yucca Mountain Site Characterization Project. Volume 1, Data summary". United States. doi:10.2172/88830. https://www.osti.gov/servlets/purl/88830.
@article{osti_88830,
title = {Geotechnical characterization of the North Ramp of the Exploratory Studies Facility: Yucca Mountain Site Characterization Project. Volume 1, Data summary},
author = {Brechtel, C.E. and Lin, Ming and Martin, E. and Kessel, D.S.},
abstractNote = {This report presents the results of geological and geotechnical characterization of the Miocene volcanic tuff rocks of the Timber Mountain and Paintbrush groups that the tunnel boring machine will encounter during excavation of the Exploratory Studies Facility (ESF) North Ramp. The is being constructed by the DOE as part of the Yucca Mountain Project site characterization activities. The purpose of these activities is to evaluate the feasibility of locating a potential high-level nuclear waste repository on lands adjacent to the Nevada Test Site, Nye County, Nevada. This report was prepared as part of the Soil and Rock Properties Studies in accordance with the 8.3.1.14.2 Study Plan. This report is volume 1 of the data summary.},
doi = {10.2172/88830},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 1995},
month = {Mon May 01 00:00:00 EDT 1995}
}

Technical Report:

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  • This report presents the results of the geological and geotechnical characterization of the Miocene volcanic tuff rocks of the Timber Mountain and Paintbrush groups that the tunnel boring machine will encounter during excavations of the Exploratory Studies Facility (ESF) North Ramp. The information in this report was developed to support the design of the ESF North Ramp. The ESF is being constructed by the DOE as part of the Yucca Mountain Project site characterization activities. The purpose of these activities is to evaluate the potential to locate the national high-level nuclear waste repository on land within and adjacent to themore » Nevada Test Site (NTS), Nye County, Nevada. This report was prepared as part of the Soil and Rock Properties Studies in accordance with the 8.3.1.14.2 Study Plan to Provide Soil and Rock Properties. This is volume 2 which contains NRG Corehole Data for each of the NRG Holes.« less
  • An Exploratory Studies Facility (ESF) is planned for use on the characterization of a potential site for a high-level nuclear waste repository at Yucca Mountain, NV. A comparative evaluation of ESF- repository design was conducted for the Department of Energy`s Yucca Mountain Site Characterization Project Office. The purposed of the evaluation were to identify and rank order ESF-repository options and to improve understanding of the favorable or unfavorable features of an ESF design. The evaluation relied on techniques from decision analysis, including decision trees and multiattribute utility analysis (MUA). Decision trees provided a means for evaluating decisions under uncertainty. MUAmore » provided a means for evaluating decisions with multiple, possibly competing objectives. Thirty-four ESF-repository options were evaluated and ranked based on inputs provided by 11 panels composed of technical specialists and one panel composed of senior managers. With guidance from decision analysts, the technical specialists developed the measures for quantifying performance; identified, developed, and analyzed scenarios for the development and operation of the ESF and the potential repository; and provided estimates of the probabilities of uncertainties and the performance of each option against various performance measures. With similar guidance, the senior managers specified the objectives and criteria for the evaluation, the value tradeoffs among objectives, and the attitude toward risk used in the analysis.« less
  • An Exploratory Studies Facility (ESF) is planned for use in the characterization of a potential site for a high-level nuclear waste repository at Yucca Mountain, NV. A comparative evaluation of ESF-repository design options was conducted for the Department of Energy`s Yucca Mountain Site Characterization Project Office. The purposes of the evaluation were to identify and rank order ESF-repository options and to improve understanding of the favorable or unfavorable features of an ESF design. The evaluation relied on techniques from decision analysis, including decision trees and multiattribute utility analysis (MUA). Decision trees provided a means for evaluating decisions under uncertainty. MUAmore » provided a means for evaluating decisions with multiple, possibly competing objectives. Thirty-four ESF-repository options were evaluated and ranked based on inputs provided by 11 panels composed of technical specialists and one panel composed of senior managers. With guidance from decision analysts, the technical specialists developed the measures for quantifying performance; identified, developed, and analyzed scenarios for the development and operation of the ESF and the potential repository; and provided estimates of the probabilities of uncertainties and the performance of each option against various performance measures. With similar guidance, the senior managers specified the objectives and criteria for the evaluation, the value tradeoffs among objectives, and the attitude toward risk used in the analysis.« less
  • A series of ventilation experiments have been performed to assess the potential retention of diesel exhaust constituents in the North Ramp of the Yucca Mountain Site Characterization Project`s Exploratory Studies Facility (ESF). Measurements were taken to help evaluate the potential impact of retained diesel exhaust constituents on future in-situ experiments and long-term waste isolation. Assessment of the diesel exhaust retention in the ESF North Ramp required the measurement of air velocities, meteorological measurements, quantification of exhaust constituents within the ventilation air stream, multiple gas sample collections, and on-line diesel exhaust measurements. In order to assess variability within specific measurements, themore » experiment was divided into three separate sampling events. Although somewhat variable from event to event, collected data appear to support pre-test assumptions of high retention rates for exhaust constituents within the tunnel. The results also show that complete air exchange in the ESF does not occur within the estimated 16 to 20 minutes derived from the ventilation flowrate measurements. Because the scope of work for these activities covered only measurement and acquisition of data, no judgment is offered by the author as to the implications of this work. Final analyses and decisions based upon the entire compendium of data associated with this investigation is being undertaken by the Repository and ESF Ventilation Design Groups of the Yucca Mountain Site Characterization Project.« less
  • Yucca Mountain, in southern Nevada, is being investigated by the US Department of Energy as a potential site for a repository for high-level radioactive waste. This report documents the results of surface-based geologic, pneumatic, hydrologic, and geochemical studies conducted during 1992 to 1996 by the US Geological Survey in the vicinity of the North Ramp of the Exploratory Studies Facility (ESF) that are pertinent to understanding multiphase fluid flow within the deep unsaturated zone. Detailed stratigraphic and structural characteristics of the study area provided the hydrogeologic framework for these investigations. Shallow infiltration is not discussed in detail in this reportmore » because the focus in on three major aspects of the deep unsaturated-zone system: geologic framework, the gaseous-phase system, and the aqueous-phase system. However, because the relation between shallow infiltration and deep percolation is important to an overall understanding of the unsaturated-zone flow system, a summary of infiltration studies conducted to date at Yucca Mountain is provided in the section titled Shallow Infiltration. This report describes results of several Site Characterization Plan studies that were ongoing at the time excavation of the ESF North Ramp began and that continued as excavation proceeded.« less