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

Description: This paper presents a series of modeling investigations to characterize percolation patterns in the unsaturated zone of Yucca Mountain, Nevada, a proposed underground repository site for storing high-level radioactive waste. The investigations are conducted using a modeling approach that integrates a wide variety of moisture, pneumatic, thermal, and isotopic geochemical field data into a comprehensive three-dimensional numerical model through model calibration. This integrated modeling approach… more
Date: November 3, 2003
Creator: Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Pan, Lehua & Bodvarsson,Gudmundur S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Aging and Phase Stability Studies of Alloy 22 FY08 Final Report

Description: This report is a compilation of work done over the past ten years in support of phase stability studies of Alloy 22 for the Yucca Mountain Project and contains information previously published, reported, and referenced. Most sections are paraphrased here for the convenience of readers. Evaluation of the fabrication processes involved in the manufacture of waste containers is important as these processes can have an effect on the metallurgical structure of an alloy. Because material properties s… more
Date: April 3, 2008
Creator: Torres, S G
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Passive Seismic Monitoring for Rockfall at Yucca Mountain: Concept Tests

Description: For the purpose of proof-testing a system intended to remotely monitor rockfall inside a potential radioactive waste repository at Yucca Mountain, a system of seismic sub-arrays will be deployed and tested on the surface of the mountain. The goal is to identify and locate rockfall events remotely using automated data collecting and processing techniques. We install seismometers on the ground surface, generate seismic energy to simulate rockfall in underground space beneath the array, and interp… more
Date: March 3, 2003
Creator: Cheng, J.; Twilley, K.; Murvosh, H.; Tu, Y.; Luke, B.; Yfantis, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analyzing Unsatirated Flow Patterns in Fractured Rock Using an Integrated Modeling Approach

Description: Characterizing percolation patterns in unsaturated fractured rock has posed a greater challenge to modeling investigations than comparable saturated zone studies, because of the heterogeneous nature of unsaturated media and the great number of variables impacting unsaturated flow. This paper presents an integrated modeling methodology for quantitatively characterizing percolation patterns in the unsaturated zone of Yucca Mountain, Nevada, a proposed underground repository site for storing high-… more
Date: August 3, 2006
Creator: Wu, Y.S.; Lu, G.; Zhang, K.; Pan, L. & Bodvarsson, G.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ECRB REFUGE CHAMBER

Description: The purpose of this calculation is to identify the initial design requirements for refuge stations, including the client requirements, standards, codes, laws, and regulations, general discipline design criteria, and design basis events and hazards. The scope of this document is for the specific task of designing and constructing refuge stations in the Enhanced Characterization Repository Block (ECRB) subsurface openings as necessary personnel safety enhancements to the current construction, mai… more
Date: December 3, 2001
Creator: Keifer, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of the Thermal Response of the 5-DHLWaste Package-Hypothetical Fire Accident

Description: The purpose of this calculation is to determine the thermal response of the 5-defense high level waste (DHLW)/Department of Energy (DOE) codisposal waste package (WP) to the hypothetical fire accident. The objective is to calculate the temperature response of the DHLW glass to the hypothetical short-term fire defined in 10 CFR 71, Section 73(c)(4), Reference 1. The scope of the calculation includes evaluation of the accident with the waste package above ground, at the Yucca Mountain surface fac… more
Date: November 3, 2001
Creator: Moore, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Eruptive and Geomorphic Processes at the Lathrop Wells Scoria Cone

Description: The {approx}80 ka Lathrop Wells volcano (southern Nevada, U.S.A.) preserves evidence for a range of explosive processes and emplacement mechanisms of pyroclastic deposits and lava fields in a small-volume basaltic center. Early cone building by Strombolian bursts was accompanied by development of a fan-like lava field reaching {approx}800 m distance from the cone, built upon a gently sloping surface. Lava flows carried rafts of cone deposits, which provide indirect evidence for cone facies in l… more
Date: August 3, 2006
Creator: Valentine, G.; Krier, D.J.; Perry, F.V. & Heiken, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

IDCS NETWORK ALTERNATIVES ANALYSIS

Description: The purpose of this design analysis is to determine the feasibility of network alternatives available to support the Exploratory Study Facilities (ESF) site characterization test data gathering activity as well as the facility control and monitoring systems. If it is found that more than one feasible alternative exists, a cost analysis will also be conducted to determine the least costly alternative.
Date: February 3, 1995
Creator: Rosche, R.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Inventory Abstraction

Description: The purpose of the inventory abstraction as directed by the development plan (CRWMS M&O 1999b) is to: (1) Interpret the results of a series of relative dose calculations (CRWMS M&O 1999c, 1999d). (2) Recommend, including a basis thereof, a set of radionuclides that should be modeled in the Total System Performance Assessment in Support of the Site Recommendation (TSPA-SR) and the Total System Performance Assessment in Support of the Final Environmental Impact Statement (TSPA-FEIS). (3) … more
Date: November 3, 2000
Creator: Leigh, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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

Description: Potentially corrosive brines can form during post-closure by deliquescence of salt minerals in dust deposited on the surface of waste packages at Yucca Mountain during operations and the pre-closure ventilation period. Although thermodynamic modeling and experimental studies of brine deliquescence indicates that brines are likely to form, they will be nitrate-rich and non-corrosive. Processes that modify the brines following deliquescence are beneficial with respect to inhibition of corrosion. … more
Date: August 3, 2005
Creator: Bryan, C.; Jack, R.; T, Wolery; Shields, D.; Sutton, M.; Hardin, E. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

United States Program on Spent Nuclear Fuel and High-Level Radioactive Waste Management

Description: The President signed the Congressional Joint Resolution on July 23, 2002, that designated the Yucca Mountain site for a proposed geologic repository to dispose of the nation's spent nuclear fuel (SNF) and high-level radioactive waste (HLW). The United States (U.S.) Department of Energy's (DOE) Office of Civilian Radioactive Waste Management (OCRWM) is currently focusing its efforts on submitting a license application to the U.S. Nuclear Regulatory Commission (NRC) in December 2004 for construct… more
Date: October 3, 2004
Creator: Stewart, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Future Climate Analysis

Description: This report documents an analysis that was performed to estimate climatic variables for the next 10,000 years by forecasting the timing and nature of climate change at Yucca Mountain, Nevada, the site of a repository for spent nuclear fuel and high-level radioactive waste. The future-climate estimates are based on an analysis of past-climate data from analog meteorological stations, and this report provides the rationale for the selection of these analog stations. The stations selected provide … more
Date: September 3, 2004
Creator: Cambell, C. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MEASUREMENT OF FRICTIONAL PRESSURE DIFFERENTIALS DURING A VENTILATION SURVEY

Description: During the course of a ventilation survey, both airflow quantity and frictional pressure losses are measured and quantified. The measurement of airflow has been extensively studied as the vast majority of ventilation standards/regulations are tied to airflow quantity or velocity. However, during the conduct of a ventilation survey, measurement of airflow only represents half of the necessary parameters required to directly calculate the airway resistance. The measurement of frictional pressure … more
Date: November 3, 2003
Creator: B.S. Prosser, PE & I.M. Loomis, PE, PhD
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Passive Corrosion Behavior of Alloy 22 in Multi-Ionic Aqueous Environments

Description: In current waste packaging design, Alloy 22 (Ni-22Cr-13Mo-3W-3Fe) has been chosen as the candidate materials to fabricate a 2 cm outer layer of the high-level nuclear waste containers, as part of proposed geological repository at Yucca Mountain, Nevada. During the repository period, the container materials will be subject to the corrosion due to its exposure to the multi-ionic aqueous environments. Although Alloy 22 has demonstrated excellent corrosion resistance, but accumulation of small year… more
Date: June 3, 2002
Creator: Lian, T.; Estill, J. C.; Hust, G. A.; Fix, D. V. & Rebak, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of the vaporization barrier above waste emplacement drifts

Description: Prediction of the amount of water that may seep into the waste emplacement drifts is an important aspect of assessing the performance of the proposed geologic nuclear waste repository at Yucca Mountain, Nevada. The repository is to be located in thick, partially saturated fractured tuff that will be heated to above-boiling temperatures as a result of heat generation from the decay of nuclear waste. Since water percolating down towards the repository will be subject to vigorous boiling for a sig… more
Date: February 3, 2003
Creator: Birkholzer, Jens; Mukhopadhyay, Sumit & Tsang, Yvonne
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measuring and Modeling Flow in Welded Fractured Tuffs

Description: We have carried out a series of in situ liquid-release experiments in conjunction with a numerical modeling study to examine the effect of the rock matrix on liquid flow and transport occurring primarily through the fracture network. Field experiments were conducted in the highly fractured Topopah Spring welded tuff at a site accessed from the Exploratory Studies Facility (ESFS), an underground laboratory in the unsaturated zone at Yucca Mountain, Nevada. During the experiment, wetting-front mo… more
Date: October 3, 2001
Creator: Salve, R.; Doughty, C. & Wang, J.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Nuclear Energy Option for the U.S.--How Far Are We from Public Acceptance?

Description: The recent rise of oil and gasoline prices accompanied by reluctant acknowledgement that traditional sources of energy are limited has renewed public interest in renewable energy sources. This perspective on energy is focusing attention on and facilitating acceptance of alternative energy concepts, such as solar, wind, and biomass. The nuclear energy alternative, while clean with potentially abundant fuel supplies and associated with low costs, is burdened with the frequently negative public op… more
Date: October 3, 2004
Creator: Biedscheid, J.A. & Devarakonda, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Overview of the Yucca Mountain Licensing Process

Description: This paper presents an overview of the licensing process for a Yucca Mountain repository for high-level radioactive waste and spent nuclear fuel. The paper discusses the steps in the licensing proceeding, the roles of the participants, the licensing and hearing requirements contained in the Code of Federal Regulations. A description of the Nuclear Regulatory Commission (NRC) staff acceptance and compliance reviews of the Department of Energy (DOE) application for a construction authorization an… more
Date: May 3, 2004
Creator: Wisenburg, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Vapor-Phase Garnet at Yucca Mountain, Nevada: Geochemistry and Oxygen-Isotope Thermometry

Description: About 20 vapor-phase garnets were studied in two samples of the Topopah Spring Tuff from Yucca Mountain, in southern Nevada. The Miocene-age Topopah Spring Tuff is a 350-m-thick, devitrified, moderately to densely welded ash flow that is compositionally zoned from high-silica rhyolite to quartz latite. During cooling of the tuff, escaping vapor produced lithophysae (former gas cavities) lined with an assemblage of tridymite, cristobalite, alkali feldspar, and locally, hematite and/or garnet. Va… more
Date: July 3, 2001
Creator: Moscati, R. J.; Johnson, C. A. & Whelan, J. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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