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Uranyl Nitrate Flow Loop

Description: The objectives of the work discussed in this report were to: (1) develop a flow loop that would simulate the purified uranium-bearing aqueous stream exiting the solvent extraction process in a natural uranium conversion plant (NUCP); (2) develop a test plan that would simulate normal operation and disturbances that could be anticipated in an NUCP; (3) use the flow loop to test commercially available flowmeters for use as safeguards monitors; and (4) recommend a flowmeter for production-scale te… more
Date: October 1, 2008
Creator: Ladd-Lively, Jennifer L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemistry of Gaseous Lower Halides of Uranium. Technical Progress Report, 1 September 1979-1 April 1980

Description: The gaseous uranium species UF, UF/sub 2/, UF/sub 3/, and UF/sub 4/ were generated in effusion cell beams by vaporization of UF/sub 4/(s) under reducing conditions, and they were identified and studied by mass spectrometry. From extensive second-law studies of reaction equilibria involving these species and several reaction partners used as reference standards, the individual bond dissociation energies and standard enthalpies of formation of the U-F species were derived. Reaction entropies deri… more
Date: April 15, 1980
Creator: Hildenbrand, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Formerly utilized MED/AEC sites remedial action program. Radiological survey of the E. I. Du Pont de Nemours and Co. , Deepwater, New Jersey. Final report

Description: The results of a radiological survey of the E. I. Du Pont Company, Deepwater, New Jersey, are presented in this report. During the 1940's this site was used for development of a process for the conversion of uranium oxide to produce uranium tetrafluoride and small quantities of uranium metal. The survey included measurements of the following: residual alpha and beta--gamma contamination levels, both fixed and transferable, in the one remaining uranium tetrafluoride operations building; external… more
Date: December 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Molten Fluoride Mixtures as Possible Fission Reactor Fuels

Description: Molten mixtures of fluorides with UF/sub 4/ as a component have been used as combined fuel and primary heat transfer agent in experimental high-temperature reactors and have been proposed for use in breeders or converters of /sup 233/U from thorium. Such use places stringent and diverse demands upon the fluid fuel. A brief review of chemical behavior of molten fluorides is given to show some of their strengths and weaknesses for such service.
Date: 1978-22~
Creator: Grimes, W. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solubility classification of airborne products from uranium ores and tailings piles. [Solubility parameters are based on airborne and seived ground dust samples]

Description: Airborne products generated at uranium mills were assigned solubility classifications for use in the ICRP Task Group Lung Model. No significant difference was seen between the dissolution behavior of airborne samples and sieved ground samples of the same product. If the product contained radionuclides that dissolved at different rates, composite classifications were assigned to show the solubility class of each component. If the dissolution data indicated that a radionuclide was present in two … more
Date: January 1, 1979
Creator: Kalkwarf, D. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The determination of UO/sub 2/ and UF/sub 4/ in fused fluoride salts

Description: The determination of uranium oxide solubilities in fused fluoride salts is important in the electrolytic preparation of uranium metal. This project was initiated to develop a method for the determination of UO/sub 2/ separately from UF/sub 4/ in UF/sub 4/-CaF/sub 2/-LiF fused salts. Previous methods used for the determination of UO/sub 2/ in fused fluoride salts involved inert gas fusions where oxygen was liberated as CO/sub 2/, and hydrofluorination where oxygen was released as H/sub 2/O; but … more
Date: 1989~
Creator: Batiste, D. J. & Lee, D. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Performance Assessment Transport Modeling of Uranium at the Area 5 Radioactive Waste Management Site at the Nevada National Security Site

Description: Following is a brief summary of the assumptions that are pertinent to the radioactive isotope transport in the GoldSim Performance Assessment model of the Area 5 Radioactive Waste Management Site, with special emphasis on the water-phase reactive transport of uranium, which includes depleted uranium products.
Date: October 12, 2010
Creator: Waste, NSTec Radioactive
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Production of (Uranium) Tetrafluoride

Description: Production of tetrafluoride for the month of April was 49,400. New equipment installed late in March operated smoothly and the production was slightly over the rated capacity of the plant. Nickel ends were welded on to the steel reactor tubes to prevent corrosion at the cover joint and possible contamination of the product with iron. The nickel ends will also save considerable repair work on the tube ends. The magnesium trays for some of the reactors are beginning to crack at the sides from fre… more
Date: May 13, 1943
Creator: Long, K. E. & Swinehart, C. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heated uranium tetrafluoride target system to release non-rare gas fission products for the TRISTAN isotope separator. [As replacement for uranyl stearate]

Description: Off-line experiments indicated that fluorides of As, Se, Br, Kr, Zr, Nb, Mo, Tc, Ru, Sb, Te, I and Xe could be volatilized, but except for Br, Kr, I and Xe, none of these elements were observed after mass separation in the on-line experiments. The results of the on-line experiments indicated a very low level of hydride contamination at ambient temperature and consequently, uranium tetrafluoride replaced uranyl stearate as the primary gaseous fission product target. Possible reasons for the fail… more
Date: October 1, 1977
Creator: Gill, R. L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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A spreadsheet-coupled SOLGAS: A computerized thermodynamic equilibrium calculation tool. Revision 1

Description: SOLGAS, an early computer program for calculating equilibrium in a chemical system, has been made more user-friendly, and several ``bells and whistles`` have been added. The necessity to include elemental species has been eliminated. The input of large numbers of starting conditions has been automated. A revised spreadsheet-based format for entering data, including non-ideal binary and ternary mixtures, simplifies and reduces chances for error. Calculational errors by SOLGAS are flagged, and se… more
Date: July 1995
Creator: Trowbridge, L.D. & Leitnaker, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis of uranium metal using laser-initiated reduction of uranium tetrafluoride by calcium metal

Description: Uranium metal has numerous uses in conventional weapons (armor penetrators) and nuclear weapons. It also has application to nuclear reactor designs utilizing metallic fuels--for example, the former Integral Fast Reactor program at Argonne National Laboratory. Uranium metal also has promise as a material of construction for spent-nuclear-fuel storage casks. A new avenue for the production of uranium metal is presented that offers several advantages over existing technology. A carbon dioxide (CO{… more
Date: September 1995
Creator: West, M. H.; Martinez, M. M.; Nielsen, J. B.; Court, D. C. & Appert, Q. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of Liquid-Vapor Core Reactors with MHD Generator for Space Power and Propulsion Applications

Description: Any reactor that utilizes fuel consisting of a fissile material in a gaseous state may be referred to as a gaseous core reactor (GCR). Studies on GCRs have primarily been limited to the conceptual phase, mostly due to budget cuts and program cancellations in the early 1970's. A few scientific experiments have been conducted on candidate concepts, primarily of static pressure fissile gas filling a cylindrical or spherical cavity surrounded by a moderating shell, such as beryllium, heavy water, o… more
Date: August 13, 2002
Creator: Anghaie, Samim
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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U-AVLIS feed conversion using continuous metallothermic reduction of UF{sub 4}: System description and cost estimate

Description: The purpose of this document is to present a system description and develop baseline capital and operating cost estimates for commercial facilities which produced U-Fe feedstock for AVLIS enrichment plants using the continuous fluoride reduction (CFR) process. These costs can then be used together with appropriate economic assumptions to calculate estimated unit costs to the AVLIS plant owner (or utility customer) for such conversion services. Six cases are being examined. All cases assume that… more
Date: April 1994
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary studies of a continuous process for the thermal decomposition of uranyl nitrate hexahydrate

Description: At the request of the A.E.C., experiments were conducted on the continuous addition of liquid UNH to a bed of powdered UO{sub 3} in a gas heated pot in the Pot Room of Plant 6 to gather thermal data regarding the continuous decomposition of UNH and to make observations of the physical behavior of such a system. The thermal data indicate that the size and the energy requirements of the equipment required per pound of UO{sub 3} produced would be considerably smaller than for the present batch-wis… more
Date: December 7, 1950
Creator: Shelley, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Improving the performance of the Y-12 fluidized bed contactors: Final report on investigations at the University of Tennessee

Description: Recent tests at The University of Tennessee in Knoxville (UT) have demonstrated improved fluidization performance in a mockup of the Oak Ridge Y-12 Plant fluidized bed with a modified gas distributor. Combining the modified distributor with the recently developed fluidization intensity module is expected to result in substantial operational improvements for the fluidized beds in Building 9212 at Y-12. Important additional benefits coming from the improved operation of the Y-12 fluidized beds wi… more
Date: August 1993
Creator: Daw, C. S. & Hawk, J. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Acute toxicity of uranium hexafluoride, uranyl fluoride and hydrogen fluoride

Description: Uranium hexafluoride (UF/sub 6/) released into the atmosphere will react rapidly with moisture in the air to form the hydrolysis products uranyl fluoride (UO/sub 2/F/sub 2/) and hydrogen fluoride (HF). Uranium compounds such as UF/sub 6/ and UO/sub 2/F/sub 2/ exhibit both chemical toxicity and radiological effects, while HF exhibits only chemical toxicity. This paper describes the development of a methodology for assessing the human health consequences of a known acute exposure to a mixture of … more
Date: January 1, 1988
Creator: Just, Robert A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Continuous reduction of uranium tetrafluoride

Description: Operation of a pilot-scale system for continuous metallothermic reduction of uranium tetrafluoride (UF{sub 4} or green salt) has been initiated. This activity is in support of the development of a cost- effective process to produce uranium-iron (U-Fe) alloy feed for the Uranium-Atomic Vapor Laser Isotope Separation (U-AVLIS) program. To date, five runs have been made to reduce green salt (UF{sub 4}) with magnesium. During this quarter, three runs were made to perfect the feeding system, examine… more
Date: October 21, 1993
Creator: DeMint, A. L. & Maxey, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of plasma shield technology to the reduction, treatment, and disposal of hazardous organic and/or mixed wastes with actinide recovery

Description: Los Alamos research activities are currently directed at the application of the shielded hydrogen plasma torch to the direct production of actinide metals from a UF{sub 6} feedstock. Two broad classes of thermal plasma reactors are currently in widespread use: the direct current (dc) arc jet system and the radio frequency (rf) inductively coupled system. Los Alamos has improved upon the basic rf plasma tube design using the concept of a transformer. The unique feature of the Los Alamos tube is … more
Date: January 1, 1990
Creator: Adams, B. Todd; Vaughan, Larry L.; Joyce, Edward L., Jr. & Bieniewski, Thomas M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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