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Yucca Mountain: Persistent Quality Assurance Problems Could Delay Repository Licensing and Operation

Description: A letter report issued by the General Accounting Office with an abstract that begins "The Department of Energy (DOE) must obtain a license from the Nuclear Regulatory Commission (NRC) to construct a nuclear waste repository at Yucca Mountain, Nevada. In licensing, a quality assurance program helps ensure that the information used to demonstrate the safety of the repository is defensible and well documented. DOE developed a corrective action plan in 2002 to fix recurring problems with the accura… more
Date: April 30, 2004
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Corrosion Testing of a Plutonium-Loaded Lanthanide Borosilicate Glass Made With Frit B.A.

Description: Laboratory tests were conducted with a lanthanide borosilicate (LaBS) glass made with Frit B and added PuO2 (the glass is referred to herein as Pu LaBS-B glass) to measure the dependence of the glass dissolution rate on pH and temperature. These results are compared with the dependencies used in the Defense HLW Glass Degradation Model that was developed to account for HLW glasses in total system performance assessment (TSPA) calculations for the Yucca Mountain repository to determine if that mo… more
Date: September 30, 2006
Creator: Ebert, W. L. & Engineering, Chemical
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calculation of drift seepage for alternative emplacementdesigns

Description: The calculations presented in this report are performed to obtain seepage rates into drift and boreholes for two alternative designs of drift and waste emplacement at Yucca Mountain. The two designs are defined according to the Scope of Work 14012021M1, activity 399621, drafted October 6, 1998, and further refined in a conference telephone call on October 13, 1998, between Mark Balady, Jim Blink, Rob Howard and Chin-Fu Tsang. The 2 designs considered are: (1) Design A--Horizontal boreholes 1.0 … more
Date: July 30, 1999
Creator: Li, Guomin; Tsang, Chin-Fu & Birkholzer, Jens
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Independent Review of Simulation of Net Infiltration for Present-Day and Potential Future Climates

Description: The DOE Office of Civilian Radioactive Waste Management (OCRWM) tasked Oak Ridge Institute for Science and Education (ORISE) with providing an independent expert review of the documented model and prediction results for net infiltration of water into the unsaturated zone at Yucca Mountain. The specific purpose of the model, as documented in the report MDL-NBS-HS-000023, Rev. 01, is “to provide a spatial representation, including epistemic and aleatory uncertainty, of the predicted mean annual n… more
Date: August 30, 2008
Creator: Oak Ridge Institute for Science and Education
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Implementation of Localized Corrosion in the Performance Assessment Model for Yucca Mountain

Description: A total system performance assessment (TSPA) model has been developed to analyze the ability of the natural and engineered barriers of the Yucca Mountain repository to isolate nuclear waste over the 10,000-year period following repository closure. The principal features of the engineered barrier system (EBS) are emplacement tunnels (or ''drifts'') containing a two-layer waste package (WP) for waste containment and a titanium drip shield to protect the waste package from seeping water and fallin… more
Date: April 30, 2006
Creator: Vivek Jain, S. David Sevougian, Patrick D. Mattie, Kevin G. Mon, and Robert J. Mackinnon
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quality Assurance Source Requirements Traceability Database

Description: At the Yucca Mountain Project the Project Requirements Processing System assists in the management of relationships between regulatory and national/industry standards source criteria, and Quality Assurance Requirements and Description document (DOE/R W-0333P) requirements to create compliance matrices representing respective relationships. The matrices are submitted to the U.S. Nuclear Regulatory Commission to assist in the commission's review, interpretation, and concurrence with the Yucca Mou… more
Date: January 30, 2006
Creator: MURTHY, R., NAYDENOVA, A., DEKLEVER, R., BOONE, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

FY01 Supplemental Science and Performance Analysis: Volume 1,Scientific Bases and Analyses

Description: The U.S. Department of Energy (DOE) is considering the possible recommendation of a site at Yucca Mountain, Nevada, for development as a geologic repository for the disposal of high-level radioactive waste and spent nuclear fuel. To facilitate public review and comment, in May 2001 the DOE released the Yucca Mountain Science and Engineering Report (S&ER) (DOE 2001 [DIRS 153849]), which presents technical information supporting the consideration of the possible site recommendation. The repor… more
Date: May 30, 2001
Creator: Bodvarsson, G. S. & Dobson, David
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Rhenium Uptake, as Analogue for Tc-99, by Steel Corrosion Products

Description: Static batch experiments were used to examine the sorption of dissolved perrhenate [Re(VII)], as a surrogate for pertechnetate [Tc(VII)], on corrosion products of A-516 carbon steel coupons contacted with synthetic groundwater or dilute water. After 109 days of contact time, the concentration of dissolved Re(VII) in the synthetic groundwater matrix decreased by approximately 26%; the dilute water matrix experienced a 99% decrease in dissolved Re(VII) over the same time period. Bulk XRD results … more
Date: April 30, 2006
Creator: Krupka, Kenneth M.; Brown, Christopher F.; Schaef, Herbert T.; Heald, Steve M.; Valenta, Michelle M. & Arey, Bruce W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ENGINEERED BARRIER SYSTEM FEATURES, EVENTS AND PROCESSES

Description: The purpose of this report is to evaluate and document the inclusion or exclusion of engineered barrier system (EBS) features, events, and processes (FEPs) with respect to models and analyses used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for exclusion screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (N… more
Date: August 30, 2005
Creator: Jaros, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An evaluation of the active fracture concept with modelingunsaturated flow and transport in a fractured meter-sized block ofrock

Description: Numerical simulation is an effective and economical tool for optimally designing laboratory experiments and deriving practical experimental conditions. We executed a detailed numerical simulation study to examine the active fracture concept (AFC, Liu et al., 1998) using a cubic meter-sized block model. The numerical simulations for this study were performed by applying various experimental conditions, including different bottom flow boundaries, varying injection rates, and different fracture-ma… more
Date: May 30, 2003
Creator: Seol, Yongkoo; Kneafsey, Timothy J. & Ito, Kazumasa
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

OVERVIEW OF MODELING APPROACHES FOR ASSESSING NATURAL SYSTEM PERFORMANCE OF THE HIGH-LEVEL RADIOACTIVE WASTE REPOSITORY AT YUCCA MOUNTAIN, NEVADA

Description: For two decades, extensive hydrologic investigations have been conducted for geologic disposal of high-level radioactive waste in fractured volcanic tuffs at Yucca Mountain, Nevada. Extensive field and laboratory geologic, hydrologic, and geochemical testing has provided a large amount of data for developing the conceptual understanding of these processes and parameters for quantifying these processes. A suite of sophisticated numerical models has been developed to assess the long-term performa… more
Date: May 30, 2006
Creator: Zhu, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Data Qualification Report: Calculated Porosity and Porosity-Derived Values for Lithostratigraphic Units for use on the Yucca Mountain Project

Description: The qualification is being completed in accordance with the Data Qualification Plan DQP-NBS-GS-000006, Rev. 00 (CRWMS M&O 2001). The purpose of this data qualification activity is to evaluate for qualification the unqualified developed input and porosity output included in Data Tracking Number (DTN) M09910POROCALC.000. The main output of the analyses documented in DTN M09910POROCALC.000 is the calculated total porosity and effective porosity for 40 Yucca Mountain Project boreholes. The poro… more
Date: May 30, 2001
Creator: Sanchez, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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

Description: The data covered by this qualification report have been cited in analysis/model reports (AMRs) to support the Site Recommendation in determining the suitability of Yucca Mountain as a repository for high level nuclear waste. Those analyses cited both qualified and unqualified hydrochemical data. This report evaluates unqualified precipitation chloride data based on the pedigree of the data and within the context of supporting analyses on the Yucca Mountain Project (YMP). The following AMRs use … more
Date: September 30, 2000
Creator: Wilson, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Data Qualification Report: PRecipitation and Surface Geology Data for Use on the Yucca Mountain Project

Description: The unqualified data addressed in this qualification report have been cited in an Analysis Model Report (AMR) to support the Site Recommendation in determining the suitability of Yucca Mountain as a repository for high-level radioactive waste. The unqualified data include precipitation volumes and surface geology maps The precipitation data consist of daily precipitation volumes measured at Yucca Mountain. The surface geology data include identification of the types and surface expressions of g… more
Date: November 30, 2000
Creator: Wilson, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Np and Pu Sorption to Manganese Oxide Minerals

Description: Manganese oxide minerals are a significant component of the fracture lining mineralogy at Yucca Mountain (Carlos et al., 1993) and within the tuff-confining unit at Yucca Flat (Prothro, 1998), Pahute Mesa (Drellack et al., 1997), and other locations at the Nevada Test Site (NTS). Radionuclide sorption to manganese oxide minerals was not included in recent Lawrence Livermore National Laboratory (LLNL) hydrologic source term (HST) models which attempt to predict the migration behavior of radionuc… more
Date: August 30, 2005
Creator: Zhao, P; Johnson, M R; Roberts, S K & Zavarin, M
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pore Connectivity, Episodic Flow, and Unsaturated Diffusion in Fractured Tuff

Description: We use an integrated approach consisting of experiments and complementary pore-scale network modeling to investigate the occurrence of sparsely connected pore spaces in rock matrices at Yucca Mountain, Nevada, and its implication to matrix diffusion. Imbibition results indicate that pore spaces in devitrified tuff are not well-connected, and that this lack of connectivity is further compounded by episodic flow in fractured devitrified tuff with low matrix permeability. A rigorous methodology fo… more
Date: January 30, 2006
Creator: Hu, Q; Ewing, R P; Tomutsa, L & Singleton, M J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Seismic tomography Technology for the Water Infiltration Experiment

Description: NSA Engineering, Inc., conducted seismic tomography surveys in Niche No.3 in the Exploratory Studies Facility (ESF), Yucca Mountain, Nevada, and Alcove No.8 in the Enhanced Characterization of the Repository Block (ECRB) cross drift as part of the Infiltration Experiment being conducted in Niche No.3. NSA Engineering is a direct support contractor to the Yucca Mountain Project. This report documents the work performed from August 14 through 30, 2000, prior to the beginning of the infiltration e… more
Date: April 30, 2001
Creator: Descour, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ENGINEERED BARRIER SYSTEM FEATURES, EVENTS, AND PROCESSES

Description: This analysis report is one of the technical reports containing documentation of the Environmental Radiation Model for Yucca Mountain, Nevada (ERMYN), a biosphere model supporting the total system performance assessment (TSPA) for the license application (LA) for the Yucca Mountain repository. This analysis report describes the development of biosphere dose conversion factors (BDCFs) for the volcanic ash exposure scenario, and the development of dose factors for calculating inhalation dose duri… more
Date: May 30, 2005
Creator: na
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Longevity of Emplacement Drift Ground Support Materials

Description: The purpose of this analysis is to evaluate the factors affecting the longevity of emplacement drift ground support materials and to develop a basis for the selection of materials for ground support that will function throughout the preclosure period of a potential repository at Yucca Mountain. REV 01 ICN 01 of this analysis is developed in accordance with AP-3.10Q, Analyses and Models, Revision 2, ICN 4, and prepared in accordance with the Technical Work Plan for Subsurface Design Section FY 0… more
Date: May 30, 2001
Creator: Tang, D. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Silica Deposition in Field and Laboratory Thermal Tests of Yucca Mountain Tuff

Description: A field thermal test was conducted by the Yucca Mountain Site Characterization Project to observe changes in the Topopah Spring Tuff middle nonlithophysal zone geohydrologic system due to thermal loading. A laboratory-scale crushed-tuff hydrothermal column test was used to investigate the tuff as a potential construction material within a nuclear-waste repository. Results of similar column tests have been cited as indications that silica deposition would plug the rock fractures above a reposito… more
Date: August 30, 2002
Creator: Levy, S. S.; Chipera, S. J. & Snow, M. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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

Description: This report presents reference information contained in the Yucca Mountain Project Automated Technical Data Tracking System. The Department of Energy is seeking to design and maintain a geologic repository for the disposal of high-level radioactive wastes. However, before this repository can be built, the DOE must first do a comprehensive site evaluation. This evaluation is subject to many regulations. This report fulfills the reporting requirements of the Site-Specific Procedural Agreement for… more
Date: June 30, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Degradation mode survey of titanium-base alloys

Description: Of the materials reviewed, commercially pure titanium, Ti Gr 2, is the most susceptible to crevice corrosion. Ti Gr 7, 12, and 16 are likely to be resistant to crevice corrosion under the current expected Yucca Mountain repository conditions. Although Grade 7 has the greatest resistance to crevice corrosion it is also the most expensive. Although the possibility of sustained loads cracking exists, it has not yet been observed in a Ti alloys. For hydride precipitation to occur 100{degrees}C, the… more
Date: January 30, 1995
Creator: Gdowski, G. E. & Ahluwalia, H. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

RADIOISOTOPE INVENTORY FOR TSPA-SR

Description: The total system performance assessment for site recommendation (TSPA-SR), on Yucca Mountain, as a site (if suitable) for disposal of radioactive waste, consists of several models. The Waste Form Degradation Model (i.e, source term) of the TSPA-SR, in turn, consists of several components. The Inventory Component, discussed here, defines the inventory of 26 radioisotopes for three representative waste categories: (1) commercial spent nuclear fuel (CSNF), (2) US Department of Energy (DOE) spent n… more
Date: January 30, 2001
Creator: Leigh, C. & Rechard, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling a Thermal Seepage Laboratory Experiment

Description: A thermal seepage model has been developed to evaluate the potential for seepage into the waste emplacement drifts at the proposed high-level radioactive materials repository at Yucca Mountain when the rock is at elevated temperature. The coupled-process-model results show that no seepage occurs as long as the temperature at the drift wall is above boiling. This important result has been incorporated into the Total System Performance Assessment of Yucca Mountain. We have applied the same concep… more
Date: July 30, 2004
Creator: Zhang, Y. & Birkholzer, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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