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PROCESSES FOR RECOVERY OF URANIUM AND THORIUM FROM GRAPHITE-BASE FUEL ELEMENTS. PART II

Description: Laboratory-scale tests on methods for recovering uranium and thorium from graphite-base reactor fuel elements are reported. The 90% HNO/sub 3/ process, which involves simultaneous disintegration and leaching in 21 M HNO/sub 3/, is applicable to all fuel elenments which do not contain coated fuel particles. Leaching of irradiated (0.001% burnup) fuels containing 3 and 12% uranlum recovered approximates 99.3 and 99.9%, respectively, of the uranium in two 4-hr leaches with boiling acid. The graphi… more
Date: November 30, 1961
Creator: Ferris, L.M.; Kibbey, A.H. & Bradley, M.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Delayed Failure Hydrogen Embrittlement of Zirconium. Quarterly Report No. 2, December 15, 1961 to March 14, 1962

Description: The purpose of this investigation is to determine the extent to which Zr and Zr alloys exhibit delayed failure (static fatigune) as caused by a combination of absorbed H and applied stress. Both notched and unnotched specimens of unalloyed Zr and Zircaloy-2 were hydrogenated to 200 ppm and 500 ppm by means of a modified Sieverts apparatus; specimens were evaluated at room temperature. Thus far, no time-dependent fracture was observed which can be attributed to the delayed failure phenomenon; it… more
Date: March 30, 1962
Creator: Weinstein, D. & Holtz, F. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Technical Report - Final report

Description: This project was a collaborative effort between Dr Teresa Burns and Dr John Larese to study the physisorption of polar molecules on ionic substrates. The work will be completed at both Coastal Carolina University and Brookhaven National Laboratory. The goals of the research are: 1) to provide detailed thermodynamic information about dipolar molecules adsorbed on ionic substrates, critical to accurately modeling the systems of interest using a spin-1 Ising model; 2) to study the structure of the… more
Date: October 30, 2008
Creator: Burns, Teresa
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Superior Sorbents for Separation of CO2 from Flue Gas at a Wide Temperature Range During Coal Combustion

Description: In chapter 1, the studies focused on the development of novel sorbents for reducing the carbon dioxide emissions at high temperatures. Our studies focused on cesium doped CaO sorbents with respect to other major flue gas compounds in a wide temperature range. The thermo-gravimetric analysis of sorbents with loadings of CaO doped on 20 wt% cesium demonstrated high CO{sub 2} sorption uptakes (up to 66 wt% CO{sub 2}/sorbent). It is remarkable to note that zero adsorption affinity for N{sub 2}, O{s… more
Date: June 30, 2007
Creator: Smirniotis, Panagiotis G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cost Effective Surfactant Formulations for Improved Oil Recovery in Carbonate Reservoirs

Description: This report summarizes work during the 30 month time period of this project. This was planned originally for 3-years duration, but due to its financial limitations, DOE halted funding after 2 years. The California Institute of Technology continued working on this project for an additional 6 months based on a no-cost extension granted by DOE. The objective of this project is to improve the performance of aqueous phase formulations that are designed to increase oil recovery from fractured, oil-we… more
Date: September 30, 2007
Creator: Goddard, William A.; Tang, Yongchun; Shuler, Patrick; Blanco, Mario & Wu, Yongfu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Visible Light Absorption of Binuclear TiOCoII Charge-Transfer UnitAssembled in Mesoporous Silica

Description: Grafting of CoII(NCCH3)2Cl2 onto mesoporous Ti-MCM-41 silicain acetonitrile solution affords binuclear Ti-O-CoII sites on the poresurface under complete replacement of the precursor ligands byinteractions with anchored Ti centers and the silica surface. The CoIIligand field spectrum signals that the Co centers are anchored on thepore surface in tetrahedral coordination. FT-infrared action spectroscopyusing ammonia gas adsorption reveals Co-O-Si bond modes at 831 and 762cm-1. No Co oxide cluster… more
Date: January 30, 2007
Creator: Han, Hongxian & Frei, Heinz
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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MINERAL-SURFACTANT INTERACTIONS FOR MINIMUM REAGENTS PRECIPITATION AND ADSORPTION FOR IMPROVED OIL RECOVERY

Description: During this reporting period, further fundamental studies were conducted to understand the mechanism of the interactions between surfactants and minerals with the aim of minimizing chemical loss by adsorption. The effects of pH and mixing ratio on the chemical loss by adsorption were investigated. Some preliminary modeling work has been done towards the aim of developing a guide book to design optimal polymer/surfactant formula based on the understanding of adsorption and orientation of surfact… more
Date: April 30, 2006
Creator: Somasundaran, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of Devonian Black Shales in Kentucky for Potential Carbon Dioxide Sequestration and Enhanced Natural Gas Production

Description: Carbonaceous (black) Devonian gas shales underlie approximately two-thirds of Kentucky. In these shales, natural gas occurs in the intergranular and fracture porosity and is adsorbed on clay and kerogen surfaces. This is analogous to methane storage in coal beds, where CO2 is preferentially adsorbed, displacing methane. Black shales may similarly desorb methane in the presence of CO2. Drill cuttings from the Kentucky Geological Survey Well Sample and Core Library were sampled to determine both … more
Date: September 30, 2005
Creator: Nuttall, Brandon C.; Eble, Cortland F.; Drahovzal, James A. & Bustin, R. Marc
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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NOx Control Options and Integration for US Coal Fired Boilers: Final Report

Description: This is the Final Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project was to develop cost-effective analysis tools and techniques for demonstrating and evaluating low-NOx control strategies and their possible impact on boiler performance for boilers firing US coals. The Electric Power Research Institute (EPRI) provided co-funding for this program. This project included research on: (1) In furnace NOx control; (2) Impacts of combustion modifications on boiler oper… more
Date: June 30, 2006
Creator: Bockelie, Mike; Cremer, Marc; Davis, Kevin; Denison, Martin; Sarofim, Adel; Senior, Connie et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SALTSTONE AND RADIONUCLIDE INTERACTIONS: RADIONUCLIDE SORPTION AND DESORPTION, AND SALTSTONE REDUCTION CAPACITY

Description: The overall objective of this study was to measure a number of key input parameters quantifying geochemical processes in the subsurface environment of the Savannah River Site's (SRS's) Saltstone Facility. For the first time, sorption (K{sub d}) values of numerous radionuclides were measured with Saltstone and Vault 2 concrete. Particular attention was directed at understanding how Tc adsorbs and desorbs from these cementitious materials with the intent to demonstrate that desorption occurs at a… more
Date: October 30, 2008
Creator: Kaplan, D; Kimberly Roberts, K; Steven Serkiz, S & Matthew Siegfried, M
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Carbon Tetrachloride Partition Coefficients Measured by Aqueous Sorption to Hanford Sediments from Operable Units 200-UP-1 and 200-ZP-1

Description: Kd values obtained on sediment samples from 200-UP-1 and 10-ZP-1 contribute to a larger Kd database that exists for other Hanford sediments, and contains significant desorption data for CCl4. Adsorption results presented here validate the use of a linear adsorption isotherm (Kd) to predict short contact time CCl4 adsorption to sediments in 200-UP-1 groundwater plume for a distinct ranges in CCl4 concentration. However, this does not imply that values of Kd will be constant if the groundwater ch… more
Date: September 30, 2007
Creator: Wellman, Dawn M.; Riley, Robert G.; Cordova, Elsa A.; Parker, Kent E. & Mitroshkov, Alexandre V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Adsorption of Carbon Tetrachloride to Sediments from the UP-1 Operable Unit

Description: In 2004, Fluor Hanford, Inc. (FHI) drilled several groundwater wells within the 200-UP-1 operable unit to monitor plumes that have been the focus of past remediation activities. Thirteen cores taken from three wells (C4298, C4299, and C4300) were sent to Pacific Northwest National Laboratory for characterization and quantification of contaminant retardation. These cores were 4-inches in diameter by 6-inches in length and were taken from depths near the unconfined aquifer surface (water table) t… more
Date: September 30, 2006
Creator: Wellman, Dawn M.; Riley, Robert G.; Parker, Kent E. & Mitroshkov, Alexandre V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Carbon Dioxide Sequestration in Geologic Coal Formations

Description: BP Corporation North America, Inc. (BP) currently operates a nitrogen enhanced recovery project for coal bed methane at the Tiffany Field in the San Juan Basin, Colorado. The project is the largest and most significant of its kind wherein gas is injected into a coal seam to recover methane by competitive adsorption and stripping. The Idaho National Engineering and Environmental Laboratory (INEEL) and BP both recognize that this process also holds significant promise for the sequestration of car… more
Date: September 30, 2001
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Permeability Changes in Coal Resulting From Gas Desorption

Description: This report documents studies on the effects of gas sorption on coal, with the intent of eventually evaluating how sorption and strain affect permeability. These studies were, carried out at the University of Alabama during the period from 1989 through 1992. Two major experimental methods were developed and used. In the strain experiments, electronic strain gauges were attached to polished blocks of coal in order to measure linear and volumetric swelling due to gas sorption. The effects of bedd… more
Date: November 30, 1992
Creator: Levine, J. R. & Johnson, P. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Deuterium absorption and material phase characteristics of Zr[sub 2]Fe

Description: Scanning electron microscope (SEM) images of polished surfaces, electron probe microanalysis, and X-ray powder diffractometry indicated the presence of a continuous Zr[sub 2]Fe phase with secondary phases of ZrFe[sub 2], Zr[sub 5]FeSn, [alpha]-Zr, and Zr[sub 6]Fe[sub 3]O. A statistically-designed experiment to determine the effects of temperature, time, and vacuum quality On activation of St 198 revealed that when activated at low temperature (350[degrees]C) deuterium absorption rate was slower… more
Date: December 30, 1992
Creator: Nobile, A.; Mosley, W. C.; Holder, J. S. & Brooks, K. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Permeability Changes in Coal Resulting From Gas Desorption. Final Report

Description: This report documents studies on the effects of gas sorption on coal, with the intent of eventually evaluating how sorption and strain affect permeability. These studies were, carried out at the University of Alabama during the period from 1989 through 1992. Two major experimental methods were developed and used. In the strain experiments, electronic strain gauges were attached to polished blocks of coal in order to measure linear and volumetric swelling due to gas sorption. The effects of bedd… more
Date: November 30, 1992
Creator: Levine, J. R. & Johnson, P. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Deuterium absorption and material phase characteristics of Zr{sub 2}Fe

Description: Scanning electron microscope (SEM) images of polished surfaces, electron probe microanalysis, and X-ray powder diffractometry indicated the presence of a continuous Zr{sub 2}Fe phase with secondary phases of ZrFe{sub 2}, Zr{sub 5}FeSn, {alpha}-Zr, and Zr{sub 6}Fe{sub 3}O. A statistically-designed experiment to determine the effects of temperature, time, and vacuum quality On activation of St 198 revealed that when activated at low temperature (350{degrees}C) deuterium absorption rate was slower… more
Date: December 30, 1992
Creator: Nobile, A.; Mosley, W. C.; Holder, J. S. & Brooks, K. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Surfactant loss control in chemical flooding: Spectroscopic and calorimetric study of adsorption and precipitation on reservoir minerals. Quarterly technical progress report, July 1, 1993--September 30, 1993

Description: The aim of this contract is to elucidate the mechanisms underlying adsorption and surface precipitation of flooding surfactants on reservoir minerals. Effect of surfactant structure, surfactant combinations and other inorganic and polymeric species will also be determined. Solids of relevant mineralogy and a multi-pronged approach consisting of micro & nano spectroscopy, microcalorimetry, electrokinetics, surface tension and wettability will be used to achieve the goals. The results of this stu… more
Date: November 30, 1993
Creator: Somasundaran, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Passive vapor extraction feasibility study

Description: Demonstration of a passive vapor extraction remediation system is planned for sites in the 200 West Area used in the past for the disposal of waste liquids containing carbon tetrachloride. The passive vapor extraction units will consist of a 4-in.-diameter pipe, a check valve, a canister filled with granular activated carbon, and a wind turbine. The check valve will prevent inflow of air that otherwise would dilute the soil gas and make its subsequent extraction less efficient. The granular act… more
Date: June 30, 1994
Creator: Rohay, V. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Effect of Chemical Additives on the Synthesis of Ethanol. Technical Progress Report 6, December 16, 1988--March 15, 1989

Description: The objective of this research is to elucidate the role of various chemical additives on ethanol synthesis over Rh- and Ni-based catalysts. Chemical additives used for this study will include S, P, Ag, Cu, Mn, and Na which have different electronegativeities. The effect of additives on the surface state of the catalysts, heat of adsorption of reactant molecules, reaction intermediates, reaction pathways, reaction kinetics, and product distributions is/will be investigated by a series of experim… more
Date: April 30, 1989
Creator: Chuang, S. S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Standardized Testing Program for Solid-State Hydrogen Storage Technologies

Description: In the US and abroad, major research and development initiatives toward establishing a hydrogen-based transportation infrastructure have been undertaken, encompassing key technological challenges in hydrogen production and delivery, fuel cells, and hydrogen storage. However, the principal obstacle to the implementation of a safe, low-pressure hydrogen fueling system for fuel-cell powered vehicles remains storage under conditions of near-ambient temperature and moderate pressure. The choices for… more
Date: July 30, 2012
Creator: Miller, Michael A. & Page, Richard A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Effect of Chemical Additives on the Synthesis of Ethanol

Description: The objective of this research is to elucidate the role of various chemical additives on ethanol synthesis over Rh- and Ni-based catalysts. Chemical additives used for this study will include S, P, Ag, Cu, Mn, and Na which have different electronegativeities. The effect of additives on the surface state of the catalysts, heat of adsorption of reactant molecules, reaction intermediates, reaction pathways, reaction kinetics, and product distributions is/will be investigated by a series of experim… more
Date: April 30, 1989
Creator: Chuang, S. S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of nuclear energy to agriculture. Final report

Description: The following research projects in radiation botany were conducted: mutation breeding of beans and cassava; biological response of coffee plants; and radiosensitivity of tropical plants. In the field of entomology experiments were conducted on radiosterilization of the Mediterranean fruit fly, the coffee leaf miner, the torsalo and the meliaceous shootborer. The following research projects in plant physiology were conducted: physiology of cassava plants; effects of temperature on germination of… more
Date: June 30, 1976
Creator: Moh, C. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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