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Bedded-salt repository analysis. Final report

Description: This report contains a description of an analysis of generic nuclear waste repository in bedded salt. This analysis was performed by TASC for inclusion in a major Lawrence Livermore Laboratory report to NRC; this report therefore should be viewed as providing more complete and detailed information about this analysis than was possible to include in the LLL report. The analysis is performed with the NUTRAN computer codes which are described in the report. The model to be analyzed is defined, and… more
Date: March 31, 1980
Creator: Guiffre, M.S.; Kaplan, M.F.; Ensminger, D.A.; Oston, S.G. & Nalbandian, J.Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stability of ceramic waste forms in potential repository environments: a review

Description: Most scenarios for geologic disposal of high-level nuclear waste include the eventual intrusion of groundwater into the repository. Reactions in the system and eventual release of the radionuclides, if any, will be controlled by the chemistry of the groundwater, the surrounding rock, the waste form, and any engineered barrier materials that are present, as well as by the temperature and pressure of the system. This report is a compilation and evaluation of the work completed to date on interact… more
Date: March 31, 1982
Creator: Johnston, R. J. & Palmer, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Phase II, Title I engineering assessment of inactive uranium mill tailings, Monument Valley site, Monument Valley, Arizona. [Environmental effects, health hazards, and options for stabilization of tailings or fencing of site]

Description: An engineering assessment was made of the problems resulting from the existence of radioactive uranium mill tailings at the Monument Valley millsite in Arizona. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals residing nearby, the investigation of sit… more
Date: March 31, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical effluents surface waters from nuclear power plants. Quarterly progress report. [Copper Toxicity]

Description: The objectives of this research project are three-fold: To obtain data on the behavior of potentially toxic substances introduced into surface waters from nuclear power plants; To determine the impact magnitude of these substances on representative and economically important aquatic species; and To develop models with which to predict the partitioning of these substances among the abiotic aquatic compartments. Results are reported from investigations of copper partitioning in seawater, evaluati… more
Date: October 31, 1977
Creator: Harrison, F.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Factors influencing the transport of actinides in the groundwater environment. Final report

Description: This report summarizes investigations of factors that significantly influence the transport of actinide cations in the groundwater environment. Briefly, measurements of diffusion coefficients for Am(III), Cm(III), and Np(V) in moist US soils indicated that diffusion is negligible compared to mass transport in flowing groundwater. Diffusion coefficients do, however, indicate that, in the absence of flowing water, actinide elements will migrate only a few centimeters in a thousand years. The rema… more
Date: July 31, 1983
Creator: Sheppard, J.C. & Kittrick, J.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Partitioning of cesium in hydrofracture grouts

Description: Phase characterization of hydrofracture grouts was accomplished with the use of optical microscopy, scanning electron microscopy, x-ray diffraction, and ..beta..-..gamma.. autoradiography. A laboratory-produced sample containing 1 wt % stable cesium and an actual hydrofracture grout sheet obtained by core dirlling were examined during this work. The phases present in these samples were identified and cesium was found to be absorbed almost entirely by illite clay agglomerates. These clay agglome… more
Date: August 31, 1983
Creator: Stinton, D.P.; McDaniel, E.W. & Weeren, H.O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radioecology of Natural Systems. Final Report, May 1, 1962-October 31, 1979

Description: This is the final report to the US Department of Energy and its predecessors on Contract EY-76-S-02-1156 with Colorado State University. During the first five years of the program, investigations were focused on the accumulation of fallout radionuclides in a well-studied mule deer population in north-central Colorado. In 1967, the scope of the program was enlarged to include studies on radionuclide behavior in mountain lake ecosystems, radiation effects on a shortgrass plains ecosystem, and the… more
Date: October 31, 1979
Creator: Whicker, F. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Example of Monte Carlo analysis applied to repository siting

Description: This report contains a detailed description of a Monte Carlo analysis of a hypothetical nuclear waste repository performed for the Lawrence Livermore Laboratory as part of their mock siting exercise. Field measurements had been used to construct a hydrology model of the geologic medium surrounding a nuclear waste repository, complete with specified uncertainties. The Monte Carlo analysis has been used to ascertaln the uncertainty in the radioactive release from the repository given the uncertai… more
Date: August 31, 1979
Creator: Giuffre, M.S. & Kaplan, M.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental and theoretical studies of particle generation afterlaser ablation of copper with background gas at atmosphericpressure

Description: Laser ablation has proven to be an effective method for generating nanoparticles; particles are produced in the laser induced vapor plume during the cooling stage. To understand the in-situ condensation process, a series of time resolved light scattering images were recorded and analyzed. Significant changes in the condensation rate and the shape of the condensed aerosol plume were observed in two background gases, helium and argon. The primary particle shape and size distribution were measured… more
Date: May 31, 2007
Creator: Wen, Sy-Bor; Mao, Xianglei; Greif, Ralph & Russo, Richard E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Multi-Scale Mass Transfer Processes Controlling Natural Attenuation and Engineered Remediation: An IFC Focused on Hanford’s 300 Area Uranium Plume Quality Assurance Project Plan

Description: The purpose of the project is to conduct research at an Integrated Field-Scale Research Challenge Site in the Hanford Site 300 Area, CERCLA OU 300-FF-5 (Figure 1), to investigate multi-scale mass transfer processes associated with a subsurface uranium plume impacting both the vadose zone and groundwater. The project will investigate a series of science questions posed for research related to the effect of spatial heterogeneities, the importance of scale, coupled interactions between biogeochemi… more
Date: January 31, 2008
Creator: Fix, N. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Enhanced Activity of Nanocrystalline Zeolites for Selective Catalytic Reduction of NOx

Description: Nanocrystalline zeolites with discrete crystal sizes of less than 100 nm have different properties relative to zeolites with larger crystal sizes. Nanocrystalline zeolites have improved mass transfer properties and very large internal and external surface areas that can be exploited for many different applications. The additional external surface active sites and the improved mass transfer properties of nanocrystalline zeolites offer significant advantages for selective catalytic reduction (SCR… more
Date: December 31, 2006
Creator: Larson, Sarah C. & Grassian, Vicki H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary safety analysis of the B-C Cribs Controlled Area. [Hanford Reservation]

Description: Approximately 2,000 acres of land in the center of the Hanford Reservation is contaminated with an estimated 14 Ci of /sup 137/Cs and 81 Ci of /sup 90/Sr associated with animal wastes. Approximately half of this activity is located on (or within) 2.5 centimeters of the ground surface. The source of the contamination was the B-C Cribs and trenches which were used as liquid radioactive waste disposal sites during the 1950's. The mechanism for movement of radionuclides from the disposal site to th… more
Date: July 31, 1974
Creator: Maxfield, H.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiological considerations of phosphogypsum utilization in agriculture

Description: The radiological concerns associated with phosphogypsum utilization in agriculture have been placed in perspective by considering the consequences of a hypothetical case involving heavy long term applications of phosphogypsum. In California, such a schedule might consist of an initial gypsum application of 10 tons/acre followed by alternate year applications of 5 tons/acre. If the radium content of the gypsum were 15 pCi/g and the till depth 6 inches, this schedule could be maintained for more … more
Date: October 31, 1980
Creator: Lindeken, C.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Numerical simulation of material transport in a regional ground-water flow system

Description: A numerical model of a regional ground-water flow system (not site specific) was coupled with a material transport model in order to study the influence of porosity and distribution coefficients in bedded media. The effects on model performance were discerned from long-term material transport simulations. Model performance was based on initial breakthrough time, average breakthrough time, and the standard deviation of the breakthrough curve at a discharge surface. Large differences in model per… more
Date: December 31, 1978
Creator: Naymik, T.G. & Thorson, L.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Technical analysis of advanced wastewater-treatment systems for coal-gasification plants

Description: This analysis of advanced wastewater treatment systems for coal gasification plants highlights the three coal gasification demonstration plants proposed by the US Department of Energy: The Memphis Light, Gas and Water Division Industrial Fuel Gas Demonstration Plant, the Illinois Coal Gasification Group Pipeline Gas Demonstration Plant, and the CONOCO Pipeline Gas Demonstration Plant. Technical risks exist for coal gasification wastewater treatment systems, in general, and for the three DOE dem… more
Date: March 31, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Realtime structural electrochemistry of platinum clusters using dispersive XAFS

Description: Chemical reference tables state that the standard potential for the reaction of Pt with water, Pt + 2H{sub 2}O {r_arrow} Pt(OH){sub 2} + 2H{sup +} + 2e{sup {minus}}, is 0.98 V, and electrochemical studies propose that this reaction may occur at potentials as low as 0.8 V. Using dispersive x-ray absorption fine-structure (XAFS) spectroscopy, the authors have directly probed the structural evolution of a Pt catalyst operating in-situ in a polymer electrolyte fuel cell during cyclic voltammetry. T… more
Date: December 31, 1993
Creator: Allen, P. G.; Conradson, S. D.; Wilson, M. S.; Gottesfeld, S. & Raistrick, I. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement and Modeling of Advanced Coal Conversion Processes. 23rd Quarterly Report, April 1, 1992--June 30, 1992

Description: The overall objective of this program is the development of predictive capability for the design, scale up, simulation, control and feedstock evaluation in advanced coal conversion devices. This technology is important to reduce the technical and economic risks inherent in utilizing coal, a feedstock whose variable and often unexpected behavior presents a significant challenge. This program will merge significant advances made at Advanced Fuel Research, Inc. (AFR) in measuring and quantitativel… more
Date: December 31, 1992
Creator: Solomon, P. R.; Serio, M. A.; Hamblen, D. G.; Smoot, L. D. & Brewster, B. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tritium Transport in Lithium Ceramics Porous Media

Description: A random network model has been utilized to analyze the problem of tritium percolation through porous Li ceramic breeders. Local transport in each pore channel is described by a set of convection-diffusion-reaction equations. Long range transport is described by a matrix technique. The heterogeneous structure of the porous medium is accounted for via Monte Carlo methods. The model was then applied to an analysis of the relative contribution of diffusion and convective flow to tritium transport … more
Date: December 31, 1991
Creator: Tam, S. W. & Ambrose, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[Kinetic Theory and Boundary Conditions for Highly Inelastic Spheres]. Quarterly Progress Report, July 1, 1993--September 30, 1993

Description: In this quarter a solution procedure is developed and numerical solutions are obtained for steady, fully developed, gravity-driven flows of identical, smooth, highly inelastic spheres down bumpy inclines. The boundary value problem for these flows was described in detail in the previous quarterly progress report (4/1/93--6/30/93). Solutions to the problem had not been obtained. The solution procedure is described in detail and numerical solutions are obtained that are most easily parameterized … more
Date: December 31, 1993
Creator: Richman, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of rotating contactor to natural gas processing

Description: The objective of to evaluate the potential of rotating gas-liquid contactors for natural gas processing by expanding the currently available database. This expansion is leading to commercial demonstration of this technology to environments representative of those typically encountered in the natural gas processing industry. Operational and reliability concerns will be addressed while generating pertinent engineering data relating to the mass-transfer process.
Date: December 31, 1993
Creator: Lee, A. L. & Semrau, J. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Modeling of chemical vapor infiltration for composite fabrication

Description: We describe our ongoing efforts to develop a general, validated, 3-D, finite-volume model for the chemical vapor infiltration (CVI) process. The model simulates preform densification for both isothermal (ICVI) and forced flow-thermal gradient (FCVI) variations of the process, but is most useful for FCVI where specification and control of flow rates and temperature profiles are critical to rapid, uniform densification. The model has been validated experimentally for both ICVI and FCVI fabricatio… more
Date: December 31, 1993
Creator: Starr, T. L. & Besmann, T. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[Kinetic Theory and Boundary Conditions for Highly Inelastic Spheres]. Quarterly Progress Report, April 1, 1993--June 30, 1993

Description: In this quarter, a kinetic theory was employed to set up the boundary value problem for steady, fully developed, gravity-driven flows of identical, smooth, highly inelastic spheres down bumpy inclines. The solid fraction, mean velocity, and components of the full second moment of fluctuation velocity were treated as mean fields. In addition to the balance equations for mass and momentum, the balance of the full second moment of fluctuation velocity was treated as an equation that must be satisf… more
Date: December 31, 1993
Creator: Richman, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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