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Bond Strength of Cementitious Borehole Plugs in Welded Tuff

Description: Axial loads on plugs or seals in an underground repository due to gas, water pressures and temperature changes induced subsequent to waste and plug emplacement lead to shear stresses at the plug/rock contact. Therefore, the bond between the plug and rock is a critical element for the design and effectiveness of plugs in boreholes, shafts or tunnels. This study includes a systematic investigation of the bond strength of cementitious borehole plugs in welded tuff. Analytical and numerical analysi… more
Date: February 1, 1991
Creator: Akgun, H. & Daemen, J. J. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

RE/SPEC Inc. technical support to the Repository Technology Program; Summary of activities for September 1, 1988--June 30, 1992

Description: This report presents a summary of all RE/SPEC Inc. technical support activities to the Repository Technology Program (RTP) from September 1, 1988, through June 30, 1992. The RE/SPEC Inc. activities are grouped into the following categories: project management, project quality assurance (QA), performance assessment (PA), support of the Office of Civilian Radioactive Waste Management (OCRWM) through technical reviews and general assistance, participation in the Department of Energy (DOE) Internat… more
Date: June 1, 1992
Creator: Wagner, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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International technology catalogue: Foreign technologies to support the environmental restoration and waste management needs of the DOE complex

Description: This document represents a summary of 27 foreign-based environmental restoration and waste management technologies that have been screened and technically evaluated for application to the cleanup problems of the Department of Energy (DOE) nuclear weapons complex. The evaluation of these technologies was initiated in 1992 and completed in 1995 under the DOE`s International Technology Coordination Program of the Office of Technology Development. A methodology was developed for conducting a countr… more
Date: July 1, 1995
Creator: Matalucci, R.V.; Jimenez, R.D. & Esparza-Baca, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geophysical characterization of subsurface barriers

Description: An option for controlling contaminant migration from plumes and buried waste sites is to construct a subsurface barrier of a low-permeability material. The successful application of subsurface barriers requires processes to verify the emplacement and effectiveness of barrier and to monitor the performance of a barrier after emplacement. Non destructive and remote sensing techniques, such as geophysical methods, are possible technologies to address these needs. The changes in mechanical, hydrolo… more
Date: August 1, 1995
Creator: Borns, D. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

WESF hot cells waste minimization criteria hot cells window seals evaluation

Description: WESF will decouple from B Plant in the near future. WESF is attempting to minimize the contaminated solid waste in their hot cells and utilize B Plant to receive the waste before decoupling. WESF wishes to determine the minimum amount of contaminated waste that must be removed in order to allow minimum maintenance of the hot cells when they are placed in ''laid-up'' configuration. The remaining waste should not cause unacceptable window seal deterioration for the remaining life of the hot cells… more
Date: March 31, 1997
Creator: Walterskirchen, K.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ceramic composite coatings

Description: A thin, room-temperature-curing, ceramic composite for coating and patching metal substrates comprises a sol gel silica glass matrix filled with finely ground particles or fibers, preferably alumina. The sol gel glass is made by adding ethanol to water to form a first mixture, then separately adding ethanol to tetraethyl orthosilicate to form a second mixture, then slowly adding the first to the second mixture to make a third mixture, and making a slurry by adding the finely ground particles or… more
Date: December 31, 1991
Creator: Wicks, G. G.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

User`s guide to the Yucca Mountain Integrating Model (YMIM) Version 2.1

Description: The Yucca Mountain Integrating Model (YMIM) is an integrated model of the engineered barrier system. It contains models of the processes of waste container failure and nuclide release from the fuel rods. YMIM is driven by scenarios of container and rod temperature, near-field chemistry, and near-field hydrology provided by other modules. It is designed to be highly modular so that a model of an individual process can be easily modified to replaced without interfering with the models of other pr… more
Date: April 1, 1995
Creator: Gansemer, J. & Lamont, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The hydrothermal stability of cement sealing materials in the potential Yucca Mountain high level nuclear waste repository

Description: Cementitious materials, together with other materials, are being considered to seal a potential repository at Yucca Mountain. A concern with cementitious materials is the chemical and mineralogic changes that may occur as these materials age while in contact with local ground waters. A combined theoretical and experimental approach was taken to determine the ability to theoretically predict mineralogic changes. The cementitious material selected for study has a relatively low Ca:Si ratio approa… more
Date: November 26, 1991
Creator: Krumhansl, J. L.; Hinkebein, T. E. & Myers, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Injectable barriers for waste isolation

Description: In this paper the authors report laboratory work and numerical simulation done in support of development and demonstration of injectable barriers formed from either of two fluids: colloidal silica or polysiloxane. Two principal problems addressed here are control of gel time and control of plume emplacement in the vadose zone. Gel time must be controlled so that the viscosity of the barrier fluid remains low long enough to inject the barrier, but increases soon enough to gel the barrier in plac… more
Date: March 1, 1995
Creator: Persoff, P.; Finsterle, S.; Moridis, G.J.; Apps, J.; Pruess, K. & Muller, S.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laboratory Testing of Cement Grouting of Fractures in Welded Tuff

Description: Fractures in the rock mass surrounding a repository and its shafts, access drifts, emplacement rooms and holes, and exploratory or in-situ testing holes, may provide preferential flowpaths for the flow of groundwater or air, potentially containing radionuclides. Such cracks may have to be sealed. The likelihood that extensive or at least local grouting will be required as part of repository sealing has been noted in numerous publications addressing high level waste repository closing. The objec… more
Date: March 1, 1991
Creator: Sharpe, C. J. & Daemen, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineered materials characterization report for the Yucca Mountain Site Characterization Project. Volume 1, Introduction, history, and current candidates

Description: The purpose of the Yucca Mountain Site Characterization Project is to evaluate Yucca Mountain for its suitability as a potential site for the nation`s first high-level nuclear waste repository. As part of this effort, Lawrence Livermore National Laboratory (LLNL) has been occupied for a number of years with developing and evaluating the performance of waste packages for the potential repository. In recent years this work has been carried out under the guidance of and in collaboration with the M… more
Date: August 1, 1995
Creator: Van Konynenburg, R. A.; McCright, R. D.; Roy, A. K. & Jones, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical compatibility screening results of plastic packaging to mixed waste simulants

Description: We have developed a chemical compatibility program for evaluating transportation packaging components for transporting mixed waste forms. We have performed the first phase of this experimental program to determine the effects of simulant mixed wastes on packaging materials. This effort involved the screening of 10 plastic materials in four liquid mixed waste simulants. The testing protocol involved exposing the respective materials to {approximately}3 kGy of gamma radiation followed by 14 day e… more
Date: December 1995
Creator: Nigrey, P. J. & Dickens, T. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analysis of core samples from jet grouted soil

Description: Superplasticized cementitious grouts were tested for constructing subsurface containment barriers using jet grouting in July, 1994. The grouts were developed in the Department of Applied Science at Brookhaven National Laboratory. The test site was located close to the Chemical Waste Landfill at Sandia National Laboratories, Albuquerque, NM. Sandia was responsible for the placement contract. The jet grouted soil was exposed to the service environment for one year and core samples were extracted … more
Date: October 1995
Creator: Allan, M. L. & Kukacka, L. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of closure cap and liner on contaminant release rates from grouted wastes

Description: This paper describes a groundwater modeling study of waste disposal concepts using grouted waste forms. The focus of the study is on the effects of clay caps and concrete vaults on contaminant migration. The authors modeled three waste disposal scenarios: (1) Grouted waste was solidified in an earthen trench and covered with soil, there was no vault and no cap; (2) grouted waste was solidified in an earthen trench, the entire waste disposal facility was then closed under a clay cap; (3) grouted… more
Date: August 1, 1996
Creator: Yu, A. D.; Fowler, J. R. & Bignell, D. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Field and laboratory testing of seal materials proposed for the Waste Isolation Pilot Plant

Description: The Small Scale Seal Performance Tests (SSSPT) were a series of in situ tests designed to evaluate the feasibility of various materials for sealing purposes. Testing was initiated in 1985 and concluded in 1995. Materials selected for the SSSPT included salt-saturated concrete, a 50%/50% mixture of crushed salt and bentonite, bentonite, and crushed salt. This paper presents a summary of the SSSPT field program, results of the in situ testing, and a discussion of post-testing laboratory studies o… more
Date: February 5, 1996
Creator: Knowles, M.K. & Howard, C.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A shaft seal system for the Waste Isolation Pilot Plant

Description: As part of the demonstration of compliance with federal regulations, a shaft seal system has been designed for the Waste Isolation Pilot Plant. The system completely fills the 650 m shafts with components consisting of the common engineering materials, each of which possesses low permeability, longevity, and can be constructed using available technology. Design investigations couple rock mechanics and fluid flow analysis and tests of these materials within the natural geological setting, and de… more
Date: July 1, 1996
Creator: Hansen, F. D.; Ahrens, E. H.; Dennis, A. W.; Hurtado, L. D.; Knowles, M. K.; Tillerson, J. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Compatibility of packaging components with simulant mixed waste

Description: The purpose of hazardous and radioactive materials packaging is to enable these materials to be transported without posing a threat to the health or property of the general public. To achieve this aim, regulations in the US have been written establishing general design requirements for such packagings. While no regulations have been written specifically for mixed waste packaging, regulations for the constituents of mixed wastes, i.e., hazardous and radioactive substances, have been codified by … more
Date: April 1, 1996
Creator: Nigrey, P. J. & Dickens, T. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sealants for Solid Oxide Fuel Cells

Description: Basic requirements for a sealant are good bonding to the materials of interest, chemical stability in the operating environment, and low gas permeability. For high-temperature operation as in Solid Oxide Fuel Cells (SOFCs), the sealant must also have a thermal expansion which is reasonably close to that of the other materials involved and must have some compliance, or softness, to allow for some mismatch between the components to be joined. In this paper, we discuss a family of glass-ceramic ma… more
Date: February 1, 1996
Creator: Kueper, T. W.; Bloom, I. D. & Krumpelt, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sealant materials for solid oxide fuel cells

Description: The objective of this work is to complete the development of soft glass-ceramic sealants for the solid oxide fuel cell (SOFC). Among other requirements, the materials must soften at the operation temperature of the fuel cell (600--1,000 C) to relieve stresses between stack components, and their thermal expansions must be tailored to match those of the stack materials. Specific objectives included addressing the needs of industrial fuel cell developers, based on their evaluation of samples the a… more
Date: December 31, 1995
Creator: Kueper, T. W.; Krumpelt, M. & Meiser, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sealant materials for solid oxide fuels and other high-temperature ceramics

Description: Glass-ceramic sealing materials have been developed with mechanical and chemical properties suitable for a variety of high-temperature applications. We have demonstrated the ability to tailor the thermal expansion coefficient between 8 and 12 x 10{sup -6}/{degrees}C, and the softening temperature can be adjusted such that the materials have suitable viscosities for a soft, compliant seal at temperatures ranging from 650 to 1000{degrees}C. These materials form excellent bonds to a variety of cer… more
Date: December 31, 1995
Creator: Kueper, T. W. & Bloom, I. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Properties of dynamically compacted WIPP salt

Description: Dynamic compaction of mine-run salt is being investigated for the Waste Isolation Pilot Plant (WIPP), where compacted salt is being considered for repository sealing applications. One large-scale and two intermediate-scale dynamic compaction demonstrations were conducted. Initial fractional densities of the compacted salt range form 0.85 to 0.90, and permeabilities vary. Dynamically-compacted specimens were further consolidated in the laboratory by application of hydrostatic pressure. Permeabil… more
Date: July 1, 1996
Creator: Brodsky, N. S.; Hansen, F. D. & Pfeifle, T. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Case studies of sealing methods and materials used in the salt and potash mining industries

Description: Sealing methods and materials currently used in salt and potash industries were surveyed to determine if systems analogous to the shaft seal design proposed for the Waste Isolation Pilot Plant (WIPP) exist. Emphasis was first given to concrete and then expanded to include other materials. Representative case studies could provide useful design, construction, and performance information for development of the WIPP shaft seal system design. This report contains a summary of engineering and constr… more
Date: November 1995
Creator: Eyermann, T. J.; van Sambeek, L. L. & Hansen, F. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Decontamination systems information and research program -- Literature review in support of development of standard test protocols and barrier design models for in situ formed barriers project

Description: The US Department of Energy is responsible for approximately 3,000 sites in which contaminants such as carbon tetrachloride, trichlorethylene, perchlorethylene, non-volatile and soluble organic and insoluble organics (PCBs and pesticides) are encountered. In specific areas of these sites radioactive contaminants are stored in underground storage tanks which were originally designed and constructed with a 30-year projected life. Many of these tanks are now 10 years beyond the design life and fai… more
Date: December 1, 1994
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of potential crushed-salt constitutive models

Description: Constitutive models describing the deformation of crushed salt are presented in this report. Ten constitutive models with potential to describe the phenomenological and micromechanical processes for crushed salt were selected from a literature search. Three of these ten constitutive models, termed Sjaardema-Krieg, Zeuch, and Spiers models, were adopted as candidate constitutive models. The candidate constitutive models were generalized in a consistent manner to three-dimensional states of stres… more
Date: December 1, 1995
Creator: Callahan, G. D.; Loken, M. C.; Sambeek, L. L. Van; Chen, R.; Pfeifle, T. W.; Nieland, J. D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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