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in subjects: "Yucca Mountain Project"

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An Aerial Radiological Survey of the Yucca Mountain Project Proposed Land Withdrawal and Adjacent Areas

An aerial radiological survey of the Yucca Mountain Project (YMP) proposed land withdrawal was conducted from January to April 2006, and encompassed a total area of approximately 284 square miles (73,556 hectares). The aerial radiological survey was conducted to provide a sound technical basis and rigorous statistical approach for determining the potential presence of radiological contaminants in the Yucca Mountain proposed Land withdrawal area. The survey site included land areas currently man… more

Date: July 1, 2006

Creator: Craig Lyons, Thane Hendricks

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Detailed characterization and preliminary adsorption model for materials for an intermediate-scale reactive-transport experiment

An experiment involving migration of fluid and tracers (Li, Br, Ni) through a 6-m-high x 3-m-dia caisson Wedron 510 sand, is being carried out for Yucca Mountain Site Characterization Project. Sand`s surface chemistry of the sand was studied and a preliminary surface-complexation model of Ni adsorption formulated for transport calculations. XPS and leaching suggest that surface of the quartz sand is partially covered by thin layers of Fe-oxyhydroxide and Ca-Mg carbonate and by flakes of kaolini… more

Date: December 31, 1994

Creator: Ward, D. B.; Bryan, C. R. & Siegel, M. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Creep in Topopah Spring Member welded tuff. Yucca Mountain Site Characterization Project

A laboratory investigation has been carried out to determine the effects of elevated temperature and stress on the creep deformation of welded tuffs recovered from Busted Butte in the vicinity of Yucca Mountain, Nevada. Water saturated specimens of tuff from thermal/mechanical unit TSw2 were tested in creep at a confining pressure of 5.0 MPa, a pore pressure of 4.5 MPa, and temperatures of 25 and 250 C. At each stress level the load was held constant for a minimum of 2.5 {times} 10{sup 5} secon… more

Date: June 1, 1995

Creator: Martin, R. J., III; Boyd, P. J.; Noel, J. S. & Price, R. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Site environmental report for calendar year 1994, Yucca Mountain Site, Nye County, Nevada.

The Yucca Mountain Site Characterization office has established an environmental program to ensure that facilities are operated in order to protect, maintain, and restore environmental quality, minimize potential threats to the environment and the public, and comply with environmental policies and US DOE orders. The status of the environmental program has been summarized in this annual report to characterize performance, confirm compliance with environmental requirements, and highlight signific… more

Date: June 1, 1995

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Laboratory testing of West Valley reference 6 glass

A series of laboratory tests is being conducted to characterize the corrosion of West Valley reference 6 glass (WV6) and to provide parametric values for modeling its long-term durability. Models require measurement of the corrosion rate in the absence of corrosion products and in fluids that are {open_quotes}saturated{close_quotes} with corrosion products, and the identification of alteration phases. Corrosion rates in dilute and saturated conditions were measured using MCC-1 and PCT tests, re… more

Date: July 1, 1995

Creator: Ebert, W.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Summary of lithologic logging of new and existing boreholes at Yucca Mountain, Nevada, August 1993 to February 1994

Yucca Mountain, Nevada, is being investigated as a potential site for a high-level radioactive waste repository. This report summarizes the lithologic logging of new and existing boreholes at Yucca Mountain that was done from August 1993 to February 1994 by the Rock Characteristics Section, Yucca Mountain Project Branch, US Geological Survey (USGS). Units encountered during logging include Quaternary-Tertiary alluvium/colluvium, Tertiary Rainier Mesa Tuff, all units in the Tertiary Paintbrush G… more

Date: May 1, 1995

Creator: Geslin, J.K.; Moyer, T.C. & Buesch, D.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Formulation and numerical analysis of nonisothermal multiphase flow in porous media

A mathematical formulation is presented for describing the transport of air, water and energy through porous media. The development follows a continuum mechanics approach. The theory assumes the existence of various average macroscopic variables which describe the state of the system. Balance equations for mass and energy are formulated in terms of these macroscopic variables. The system is supplemented with constitutive equations relating fluxes to the state variables, and with transport prope… more

Date: June 1, 1995

Creator: Martinez, M.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Radon concentration and working level in the Exploratory Studies Facility (ESF)

Radon-222 ({sup 222}Rn) and {sup 222}Rn progeny WL monitoring in the Exploratory Studies Facility (ESF) was initiated to support regulatory compliance. Measurements were taken over two periods, in Test Alcove No. 1 of the ESF, about 60 m from the tunnel entrance. For both periods, {sup 222}Rn concentration was less than 10% of the Derived Air Concentration (DAC) set forth in DOE Order 5480.11. Thus, these assessments were sufficient to demonstrate regulatory compliance. Based on these findings,… more

Date: June 1, 1995

Creator: Stiver, J.H. & Tung, Chao-Hsiung

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Selection of a preferred initial access for the exploratory studies facility

An issue of interest to the Yucca Mountain Site Characterization Project Office (YMPO) has been selection of the preferred location for initial access to the Exploratory Studies Facility (ESF) in the event that the U.S. Department of Energy (DOE) elected to proceed with a phased approach to facility development. A task force to conduct an assessment and prepare a recommendation of the preferred initial location (north or south) for starting underground in situ tests at Yucca Mountain was initia… more

Date: June 1995

Creator: Boak, D. M.; Cikanek, E. M. & Elkins, N. Z.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Geotechnical characterization of the North Ramp of the Exploratory Studies Facility: Yucca Mountain Site Characterization Project. Volume 2, NRG corehole data appendices

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 o… more

Date: May 1, 1995

Creator: Brechtel, C.E.; Lin, Ming; Martin, E. & Kessel, D.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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

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: Report

Partner: UNT Libraries Government Documents Department

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Degradation mode survey of titanium-base alloys

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: Report

Partner: UNT Libraries Government Documents Department

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Effect of roughness and material strength on the mechanical properties of fracture replicas

This report presents the results of 11 rotary shear tests conducted on replicas of three hollow cylinders of natural fractures with JRC values of 7.7, 9.4 and 12.0. The JRC values were determined from the results of laser profilometer measurements. The replicas were created from gypsum cement. By varying the water-to-gypsum cement ratio from 30 to 45%, fracture replicas with different values of compressive strength (JCS) were created. The rotary shear experiments were performed under constant n… more

Date: August 1, 1995

Creator: Wibowo, J.; Amadei, B. & Sture, S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Continuous, environmental radon monitoring program at the Yucca Mountain Site Characterization Project

A continuous, environmental radon monitoring program has been established in support of the Department of Energy`s (DOE) Yucca Mountain Site Characterization Project (YMP). The monitoring program is to characterize the natural radon emissions at the YMP site, to understand the existing radon concentrations in the environmental background, and to assess and control the potential work exposure. Based upon a study of the monitoring results, this paper presents a preliminary understanding of the ma… more

Date: May 1995

Creator: Liu, N.; Sorensen, C. D.; Tung, C. H. & Orchard, C. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Heat transfer studies. Quarterly report

Nitrogen gas has been used in experimental studies related to understanding issues in the extension of multi-phase models to sub-residual saturation conditions during drying. Two different flow rates of 1 SLPM and 0.5 SLPM with a room temperature boundary condition on the aluminum column have been examined. Information about variations of humidity and temperatures is given. It is shown that the situation that exists in the experiments is somewhat different than that found in typical assumptions… more

Date: July 20, 1995

Creator: Boehm, R.; Chen, Y.T. & Vallebuona, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Lithostratigraphy of the Calico Hills Formation and Prow Pass Tuff (Crater Flat Group) at Yucca Mountain, Nevada

Lithostratigraphic relations within the Calico Hills Formation and Prow Pass Tuff (Crater Flat Group) were reconstructed from analysis of core samples and observation of outcrop exposures. The Calico Hills Formation is composed of five nonwelded pyroclastic units (each formed of one or more pyroclastic-flow deposits) that overlie an interval of bedded tuff and a basal volcaniclastic sandstone unit. The Prow Pass Tuff is divided into four pyroclastic units and an underlying interval of bedded tu… more

Date: July 1, 1995

Creator: Moyer, T.C. & Geslin, J.K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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OCRWM Bulletin: Westinghouse begins designing multi-purpose canister

This publication consists of two parts: OCRWM (Office of Civilian Radioactive Waste Management) Bulletin; and Of Mountains & Science which has articles on the Yucca Mountain project. The OCRWM provides information about OCRWM activities and in this issue has articles on multi-purpose canister design, and transportation cask trailer.

Date: September 1, 1995

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Mechanical properties of tuffaceous rocks under triaxial conditions

Yucca Mountain has been designated as a potential site for a high level nuclear waste repository. Part of the site characterization program is an investigation of the mechanical properties of, the tuffs which comprise Yucca Mountain. This study tested specimens of TCw tuff in triaxial compression to observe the effects of confining pressure, saturation, strain rate, and anisotropy on the compressive strengths and Young`s Moduli of the specimens. Test results have shown that increasing the confi… more

Date: December 1, 1994

Creator: Karakouzian, M. & Hudyma, N.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Consideration of criticality in a nuclear waste repository

The preliminary criticality analysis that was done suggests that the possibility of achieving critical conditions cannot be easily ruled out without looking at the geochemical process of assembly or the dynamics of the operation of a critical assembly. The evaluation of a critical assembly requires an integrated, consistent approach that includes evaluating the following: (1) the alteration rates of the layers of the container and spent fuel, (2) the transport of fissile material or neutron abs… more

Date: July 1, 1995

Creator: Rechard, R. P.; Sanchez, L. C.; Stockman, C. T.; Ramsey, J. L., Jr. & Martell, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Long-term test results from a West Valley actinide-doped reference glass

Results from drip tests designed to simulate unsaturated conditions in the proposed Yucca Mountain Repository are reported for an actinide-doped glass (reference glass ATM-10) used as a model waste form. These tests have been ongoing for nearly 7 years, with data collected on solution composition (including transuranics), colloid formation and disposition, glass corrosion layers, and solid secondary phases. This test is unique because of its long elapsed time, high content of thorium and transu… more

Date: July 1, 1995

Creator: Fortner, J.A.; Gerding, T.J. & Bates, J.K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

TBM tunneling on the Yucca Mountain Project: Proceedings

The US Department of Energy`s (DOE) Yucca Mountain Project (YMP) is a scientific endeavor to determine the suitability of Yucca Mountain for the first long term, high level nuclear waste repository in the United States. Status of this long-term project form the construction perspective is described. A key element is construction of the Exploratory Studies Facility (ESF), which is being excavated with a 7. 6 m(25 ft) diameter tunnel boring machine (TBM). Development of the ESF may include the ex… more

Date: July 1, 1995

Creator: Williamson, G. E. & Gowring, I. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Waste package project quarterly report, April 1, 1995--June 30, 1995

Research activities spanned multidisciplinary areas: structural and stress analysis of the container including nonlinear yield and damage assessment and structural stability studies of the dynamic behavior of the steel multipurpose container under normal and accidental handling conditions; nuclear fission criticality studies in the canisters; investigation of novel canister design concepts and corrosion studies; heat transfer studies of the waste canisters and in adjacent rock drifts; fluid flo… more

Date: July 20, 1995

Creator: Ladkany, S.G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Preliminary evaluation of techniques for transforming regional climate model output to the potential repository site in support of Yucca Mountain future climate synthesis

The report describes a preliminary evaluation of models for transforming regional climate model output from a regional to a local scale for the Yucca Mountain area. Evaluation and analysis of both empirical and numerical modeling are discussed which is aimed at providing site-specific, climate-based information for use by interfacing activities. Two semiempirical approaches are recommended for further analysis.

Date: June 1, 1995

Creator: Church, H.W.; Zak, B.D. & Behl, Y.K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Transport of synthetic colloids through single saturated fractures: A literature review

Colloids having the same surface charge sign as the bulk of the geologic media in a groundwater system may be able to travel through the system faster than soluble species because they will follow fluid streamlines more closely and they should have less tendency to diffuse into pores or dead spaces in the media than soluble species. Synthetic colloids with uniform, controlled properties may be ideal for serving as {open_quotes}worst-case{close_quotes} tracers that provide lower-bound estimates … more

Date: July 1, 1995

Creator: Reimus, P. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department