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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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A Process for the Recovery of Uranium From Nuclear Fuel Elements Using Fluid-Bed Drying and Volatility Techniques

Description: A process scheme for the recovery of uranium from fuel elements has been developed. The scheme combines continuous fluid-bed drying and fluoride volatility techniques after initial dissolution of the fuel element in the appropriate aqueous system, hence the designation ADF, Aqueous Dry Fluorination Process. The application of this process to the recovery of uranium from highly enriched, low uranium-zirconium alloy plate-type fuels is described. ln the process, the feed solution is sprayed horiz… more
Date: November 1, 1961
Creator: Levitz, N.; Barghusen, J.; Carls, E. & Jonke, A. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal derived fuel gases for molten carbonate fuel cells

Description: Product streams from state-of-the-art and future coal gasification systems are characterized to guide fuel cell program planners and researchers in establishing performance goals and developing materials for molten carbonate fuel cells that will be compatible with gasifier product gases. Results are presented on: (1) the range of gasifier raw-gas compositions available from the major classes of coal gasifiers; (2) the degree of gas clean-up achievable with state-of-the-art and future gas clean-… more
Date: November 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Potential for ion-induced nucleation of volatile organic compounds by radon decay in indoor environments

Description: There is considerable interest in the unattached'' fraction of radon progeny in indoor air because of its significance to the estimation of the risks of radon exposure. Because of its high mobility in air, the unattached fraction is more efficiently deposited in the respiratory tract. Variation in the diameter of the unattached'' fraction and in its diffusion coefficient can be due to clustering of other atmospheric species around the {sup 218}PoO{sub 2}{sup +} ion. The purpose of this study wa… more
Date: November 1, 1991
Creator: Daisey, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Potential for ion-induced nucleation of volatile organic compounds by radon decay in indoor environments

Description: There is considerable interest in the ``unattached`` fraction of radon progeny in indoor air because of its significance to the estimation of the risks of radon exposure. Because of its high mobility in air, the unattached fraction is more efficiently deposited in the respiratory tract. Variation in the diameter of the ``unattached`` fraction and in its diffusion coefficient can be due to clustering of other atmospheric species around the {sup 218}PoO{sub 2}{sup +} ion. The purpose of this stud… more
Date: November 1, 1991
Creator: Daisey, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tracer-level radioactive pilot-scale test of in situ vitrification for the stabilization of contaminated soil sites at ORNL

Description: A field demonstration of in situ vitrification (ISV) was completed in May 1991, and produced approximately 12 Mg of melted earthen materials containing 12.7 mCi of radioactivity within 500 g of sludge in amodel of an old seepage trench waste disposal unit. Past waste disposal operations at Oak Ridge National Laboratory have left several contaminated seepage sites. In planning for remediation of such sites, ISV technology has been identified as a leading candidate because of the high risks assoc… more
Date: November 1, 1992
Creator: Spalding, B. P.; Jacobs, G. K.; Naney, M. T.; Dunbar, N. W.; Tixier, J. S. & Powell, T. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Barium titanate nanocomposite capacitor FY09 year end report.

Description: This late start RTBF project started the development of barium titanate (BTO)/glass nanocomposite capacitors for future and emerging energy storage applications. The long term goal of this work is to decrease the size, weight, and cost of ceramic capacitors while increasing their reliability. Ceramic-based nanocomposites have the potential to yield materials with enhanced permittivity, breakdown strength (BDS), and reduced strain, which can increase the energy density of capacitors and increase… more
Date: November 1, 2009
Creator: Stevens, Tyler E.; DiAntonio, Christopher Brian; Yang, Pin; Chavez, Tom P.; Winter, Michael R.; Monson, Todd C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dissimilar behavior of technetium and rhenium in borosilicatewaste glass as determined by X-ray absorption spectroscopy

Description: Technetium-99 is an abundant, long-lived (t1/2 = 213,000 yr)fission product that creates challenges for the safe, long-term disposalof nuclear waste. While 99Tc receives attention largely due to its highenvironmental mobility, it also causes problems during its incorporationinto nuclear waste glass due to the volatility of Tc(VII) compounds. Thisvolatility decreases the amount of 99Tc stabilized in the waste glass andcauses contamination of the waste glass melter and off-gas system. Theapproach… more
Date: November 9, 2006
Creator: Lukens, Wayne W.; McKeown, David A.; Buechele, Andrew C.; Muller,Isabelle S.; Shuh, David K. & Pegg, Ian L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Stability of High-Level Waste Forms

Description: The objective of the proposed effort is to use a new approach to develop solution models of complex waste glass systems and spent fuel that are predictive with regard to composition, phase separation, and volatility. The effort will also yield thermodynamic values for waste components that are fundamentally required for corrosion models used to predict the leaching/corrosion behavior for waste glass and spent fuel material. This basic information and understanding of chemical behavior can subse… more
Date: November 10, 2006
Creator: Besmann, Theodore M. & Vienna, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CORROSION OF NICKEL-BASE SPECIMENS EXPOSED IN THE VOLATILITY PILOT PLANT MARK III FLUORINATOR

Description: The combination of operating temperatures around 550 deg C with LiF present in the salt baths produces about the same bulk metal losses on Ni and Ni- base alloys as was found by operating at 650 deg C without Li in the salt baths. The presence of U accelerates corrosion of Ni and Ni-base alloys during the Volatility Process fluorination cycle. Prior F conditioning of L Ni decreases corrosion of the material during subsequent fluorination. Prior F conditioning of INCO-61 weld metal increases the… more
Date: November 13, 1962
Creator: Kegley, T. M., Jr. & Litman, A. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tracer-level radioactive pilot-scale test of in situ vitrification for the stabilization of contaminated soil sites at ORNL

Description: A field demonstration of in situ vitrification (ISV) was completed in May 1991, and produced approximately 12 Mg of melted earthen materials containing 12.7 mCi of radioactivity within 500 g of sludge in amodel of an old seepage trench waste disposal unit. Past waste disposal operations at Oak Ridge National Laboratory have left several contaminated seepage sites. In planning for remediation of such sites, ISV technology has been identified as a leading candidate because of the high risks assoc… more
Date: November 1, 1992
Creator: Spalding, B. P.; Jacobs, G. K.; Naney, M. T.; Dunbar, N. W.; Tixier, J. S. & Powell, T. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Molten-Caustic-Leaching (MCL or Gravimelt) System Integration Project. Topical report for test circuit operation

Description: This is a report of the results obtained from the operation of an integrated test circuit for the Molten-Caustic-Leaching (MCL or Gravimelt) process for the desulfurization and demineralization of coal. The objectives of operational testing of the 20 pounds of coal per hour integrated MCL test circuit are: (1) to demonstrate the technical capability of the process for producing a demineralized and desulfurized coal that meets New Source Performance Standards (NSPS); (2) to determine the range o… more
Date: November 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Molten-Caustic-Leaching (MCL or Gravimelt) System Integration Project

Description: This is a report of the results obtained from the operation of an integrated test circuit for the Molten-Caustic-Leaching (MCL or Gravimelt) process for the desulfurization and demineralization of coal. The objectives of operational testing of the 20 pounds of coal per hour integrated MCL test circuit are: (1) to demonstrate the technical capability of the process for producing a demineralized and desulfurized coal that meets New Source Performance Standards (NSPS); (2) to determine the range o… more
Date: November 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermodynamic Study of UO3(g), UO2(OH)2(g), UO2Cl2(g), and UO2F2(g)

Description: Using the transpiration method, the volatility of uranium oxide in the presence of oxygen and water vapor has been measured at temperatures ranging from 1173 to 1573 K and the volatility of uranium oxide in the presence of oxygen and chlorine has been measured at 1175 K. The major vapor species in the presence of oxygen and water vapor are found to be UO{sub 3}(g) and UO{sub 2}(0H){sub 2}(g). Third law treatment of the vaporization data yields {Delta}H{sub f}{sup o}(298) values of -790.52 {+-} … more
Date: November 7, 2002
Creator: Ebbinghaus, B. B.; Krikorian, O. H. & Fleming, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PROGRESS RELATING TO CIVILIAN APPLICATIONS DURING OCTOBER 1959

Description: The creep properties of 15% cold-worked Zircaloy-2, as evident from results being obtained, are superior to those of the annealed Zircaloy-2 at test temperatures of 290, 345, and 400 deg C. The development of a fuel-element leak detector was continued with studies to determine the effect of AgBr concentration and the flow rate of the I/sup 131/ solution -on the exchange between solid AgBr and I. Modification and improvement of a thermal-neutron-flux monitoring system for application to the Hanf… more
Date: November 1, 1959
Creator: Dayton, R.W. & Tipton, C.R. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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THERMODYNAMICS IN THE FUSED SALT DISSOLUTION PROCESS FOR ZIRCONIUM FUEL

Description: A discussion is given of the role of thermodynamics in the fused-salt volatility process, particularly as it applies to oxidation-reduction reactions affecting zirconium, uranium, nickel, chromium, ruthenium, and other elements present in the hydrofluorination head-end step. (auth)
Date: November 19, 1959
Creator: Cathers, G.I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical properties of mendelevium

Description: Even with the most intense ion beams and the largest available quantities of target isotope, about 10/sup 6/ atoms at a time is all the Md that can be produced for chemical studies. This lack of sufficient sample size coupled with the very short lifetimes of the few atoms produced has severely restricted the gathering and the broadness of our knowledge concerning the properties of Md and the heavier elements. To illustrate, the literature contains a mere eleven references to the chemical studie… more
Date: November 1, 1980
Creator: Hulet, E. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of radionuclide vapor-phase transport in unsaturated tuff

Description: This report describes bounding calculations performed to investigate the possibility of radionuclide migration in a vapor phase associated with the emplacement of high-level waste canister in unsaturated tuff formations. Two potential radionuclide transport mechanisms in the vapor phase were examined: aerosol migration and convection/diffusion of volatile species. The former may have significant impact on the release of radionuclides to the accessible environment as the concentration in the aer… more
Date: November 1, 1986
Creator: Smith, Douglas M.; Updegraff, C. David; Bonano, Evaristo J. & Randall, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Sorption of organic gases in a furnished room

Description: We present experimental data and semi-empirical models describing the sorption of organic gases in a simulated indoor residential environment. Two replicate experiments were conducted with 20 volatile organic compounds (VOCs) in a 50-m{sup 3} room finished with painted wallboard, carpet and cushion, draperies and furnishings. The VOCs span a wide volatility range and include ten Hazardous Air Pollutants. VOCs were introduced to the static chamber as a pulse and their gas-phase concentrations we… more
Date: November 30, 2003
Creator: Singer, Brett C.; Revzan, Kenneth L.; Hotchi, Toshifumi; Hodgson, Alfred T. & Brown, Nancy J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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