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Crystal-Field Spectroscopy of UCL4 by Neutron Inelastic Scattering

Description: The crystal-field level scheme of uranium tetrachloride has been the subject of a number of investigations by both optical and magnetic measurements. Agreement does not exist. To attempt to resolve this problem we have performed experiments with the pulsed neutron source at ANL which allows electronic spectroscopy to be extended to approx.2000 cm/sup -1/. Initially using incident energies of 400 cm/sup -1/ we examined the GAMMA/sub 4/ (ground state) to GAMMA/sub 5/ (excited state) level with th… more
Date: January 1, 1985
Creator: Delamoye, P.; Krupa, J. C.; Kern, S.; Loong, C. K. & Lander, G. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Literature information applicable to the reaction of uranium oxides with chlorine to prepare uranium tetrachloride

Description: The reaction of uranium oxides and chlorine to prepare anhydrous uranium tetrachloride (UCl{sub 4}) are important to more economical preparation of uranium metal. The most practical reactions require carbon or carbon monoxide (CO) to give CO or carbon dioxide (CO{sub 2}) as waste gases. The chemistry of U-O-Cl compounds is very complex with valances of 3, 4, 5, and 6 and with stable oxychlorides. Literature was reviewed to collect thermochemical data, phase equilibrium information, and results … more
Date: February 1, 1992
Creator: Haas, P.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrogen production using fusion energy and thermochemical cycles. [Fe/sub 3/O/sub 4/-FeO, CrCl/sub 3/-CrCl/sub 2/, and UCl/sub 4/-UCl/sub 3/]

Description: Thermochemical cycles for the production of synthetic fuels would be especially suited for operation in conjunction with controlled thermonuclear fusion reactors because of the very high temperature energy which such reactors could supply. Furthermore, fusion energy when developed is considered to be an inexhaustable supply of energy. Several high-temperature two-step thermochemical cycles for the production of hydrogen are examined. A thermodynamic analysis of the Fe/sub 3/O/sub 4/--FeO, CrCl/… more
Date: February 1, 1978
Creator: Steinberg, M. & Dang, V.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cyclic voltammetric study of the reduction of U(III) to uranium metal in molten LiCl-NaCl-CaCl/sub 2/-BaCl/sub 2/-UCl/sub 3/

Description: Cyclic voltammetry was used to investigate the electrochemistry of the reduction of UCl/sub 3/ to uranium metal in molten LiCl-NaCl-CaCl/sub 2/-BaCl/sub 2/ (49.7-8.0-26.5-15.8 mol %) containing dissolved UCl/sub 3/. The purpose of the study was to obtain information on the kinetics of the reaction, which will be used in the design of electrorefining equipment for the reprocessing of core and blanket fuel discharged from the Integral Fast Reactor (IFR). The electrorefining operation employs the … more
Date: January 1, 1986
Creator: Poa, D.S.; Tomczuk, Z. & Steunenberg, R.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Resonance Raman spectra of metal halide vapor complexes

Description: Resonance Raman spectra of complex vapor phase compounds formed by reacting ''acidic'' gases (A/sub 2/X/sub 6/ = Al/sub 2/Cl/sub 6/, Al/sub 2/Br/sub 6/, In/sub 2/Cl/sub 6/) with metal halides have been measured. Spectra obtained from equilibrium vapor mixtures of A/sub 2/X/sub 6/ over solid MX/sub 2/ (= PdCl/sub 2/, PdBr/sub 2/, CuCl/sub 2/, CoBr/sub 2/, TiCl/sub 2/, FeCl/sub 2/, NiCl/sub 2/, PtCl/sub 2/) were a superposition of the A/sub 2/X/sub 6/-AX/sub 3/ bands and in few cases of new reson… more
Date: January 1, 1978
Creator: Paptheodorou, G.N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Literature information applicable to the reaction of uranium oxides with chlorine to prepare uranium tetrachloride

Description: The reaction of uranium oxides and chlorine to prepare anhydrous uranium tetrachloride (UCl{sub 4}) are important to more economical preparation of uranium metal. The most practical reactions require carbon or carbon monoxide (CO) to give CO or carbon dioxide (CO{sub 2}) as waste gases. The chemistry of U-O-Cl compounds is very complex with valances of 3, 4, 5, and 6 and with stable oxychlorides. Literature was reviewed to collect thermochemical data, phase equilibrium information, and results … more
Date: February 1, 1992
Creator: Haas, P. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Visible and near-IR spectroscopic studies of UC1{sub 4} in a basic ambient temperature melt: The observation of a possible geometric distorted UC1{sub 6}{sup 2{minus}} species and the evidence for the hydrogen-bond in the melt

Description: Since high temperatures can lead to broadening of absorption spectra, ambient temperature chloride melts were used; the system used was AlCl{sub 3}-1-ethyl-3-methyl-imidazolium chloride (EMIC). The uv-visible spectrum of UCl{sub 4} in basic melt had many peaks with the most intense (triplet) ones around 2000 nm, similar to these at high temperature and indicating the same species. The electronic transition is allowed by a static rather than a vibronic mechanism. The central peak in the UCl{sub … more
Date: September 1, 1994
Creator: Dai, S.; Toth, L. M.; Del Cul, G. D. & Metcalf, D. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Reaction of uranium oxides with chlorine and carbon or carbon monoxide to prepare uranium chlorides

Description: The preferred preparation concept of uranium metal for feed to an AVLIS uranium enrichment process requires preparation of uranium tetrachloride (UCI{sub 4}) by reacting uranium oxides (UO{sub 2}/UO{sub 3}) and chlorine (Cl{sub 2}) in a molten chloride salt medium. UO{sub 2} is a very stable metal oxide; thus, the chemical conversion requires both a chlorinating agent and a reducing agent that gives an oxide product which is much more stable than the corresponding chloride. Experimental studies… more
Date: November 1, 1991
Creator: Haas, P. A.; Lee, D. D. & Mailen, J. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plutonium recovery from spent reactor fuel by uranium displacement

Description: This report discusses a process for separating uranium values and transuranic values from fission products containing rare earth values when the values which are contained together in a molten chloride salt electrolyte. A molten chloride salt electrolyte with a first ratio of plutonium chloride to uranium chloride is contacted with both a solid cathode and an anode having values of uranium and fission products including plutonium. A voltage is applied across the anode and cathode electrolytical… more
Date: December 31, 1991
Creator: Ackerman, J. P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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CHEMISTRY DIVISION, SECTION C-1 SUMMARY REPORT FOR JANUARY, FEBRUARY, AND MARCH 1949

Description: Physical and inorganic Chemistry. Studies are reported on: volatile complexes of ZrCl/sub 4/ and HfCl/sub 4/ with POCl/sub 3/; reaction of UCl/sub 4/ with LiAlH/sub 4/; preparation and properties of metal uranates and polyuranates; heats of solution of UO/sub 2/(NO/sub 3/)/sub 2/ hydrates; absorption spectra of Np in HClO/sub 4/, and separation of Np and Pu chlorides by a flow method. Process Chemistry. Extraction of Th from Mailiackrodt U raffinate was studied. Nuclear Chemistry aad Radiochemi… more
Date: May 12, 1949
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dynamic Corrosion Screening Tests on Inconel and Nickel in NaCl-MgCl$sub 2$- UCl$sub 3$Bath

Description: Nickel is more susceptible to mass transfer ina 100hr nonisothermal dynamic corrosion system than is Inconel when exposed to a NaCl-MgCl/sub 2/-UCl/ sub 3/ (50.01800 F. No nickel mass transfer was observed in a 500hr test at 1350 F, but Inconel showed some attack under s transfer was observed in both tests, being more severe at the higher temperature. On the bases of these preliminary tests, it appears that nickel is a more satisfactory container than Inconel for the chloride bath at temperatur… more
Date: June 19, 1957
Creator: Jansen, D. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Laboratory development of chloride volatility processes for the recovery of uranium directly from spent Rover fuel or from its combustion ash

Description: Declassified 24 Sep 1973. Two chloride volatility processes for the recovery of uranium from the combustion ash from spent Rover fuel were studied in the laboratory. The fuel consists of graphite impregnated with uranium carbide. The cooling channels are of niobium carbide. In each method, the uranium is isolated as UCl/sub 4/ and it may be further processed by aqueous solvent extraction (Darex) or fluoride volatility methods. The combustion-- chlorination process involves burning the fuel elem… more
Date: June 1, 1963
Creator: Gens, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Zircex Fluoride Volatility Combination

Description: In using the Zircex Process head-end to recover Zr from fuel elements before recovery of U by fluoride volatility, loss of U as UCl/sub 4/ is a problem. The suitability of using a Ni wire filter for trapping entrained UCl/sub 4/, and recovery of the trapped U by direct fluorination of filter and residue is investigated. It is recommended from these studies that water vapor and oxygen should be kept out of the reactor, and that the filter and filter material should be further investigated. (T.R.… more
Date: March 20, 1958
Creator: Ammann, P. R.; Madden, D. A. & Swift, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Method for Making a Uranium Chloride Salt Product

Description: The subject apparatus provides a means to produce UCl3, in large quantities without incurring corrosion of the containment vessel or associated apparatus. Gaseous Cl is injected into a lower layer of Cd where CdCl2 is formed. Due to is lower density, the CdCl2 rises through the Cd layer into a layer of molten LiCl-KCL salt where a rotatable basket containing uranium ingots is suspended. The CdCl2 reacts with the uranium to form UCl, and Cd. Due to density differences, the Cd sinks down to the l… more
Date: October 5, 2004
Creator: Miller, William F. & Tomczuk, Zygmunt
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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Laboratory development of a process for recovering uranium from Rover fuel by combustion, liquid-phase chlorination with hexachloropropene, and aqueous extraction

Description: Declassified 24 Sep 1973. The purpose of this work was to develop a process for recovering the uranium from spent Rover fuels. Only one reactor is used, and the process involves a 4-hr combustion of the fuel in oxygen at about 800 deg C, a 4-hr chlorination of the U/sub 3/O/sub 8/-Nb/ sub 2/O/sub 5/ ash in refluxing hexachloropropene at 180 deg C, dissolution-extraction of the UCl/sub 4/ and NbCl/sub 5/ products at room temperature by dilute nitric acid, and extraction of the uranium from the r… more
Date: June 28, 1963
Creator: Gens, T.A. & Borne, T.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Contribution to the Theory of Two-Phase, One-Component Critical Flow

Description: Equipment was built where critical-flow data above 100 psia were obtained and a theory developed that predicts the experimental values satisfactorily. Theoretical expressions for the specific volume, void fraction, and slip ratio for critical steam-water mixtures have been derived. Therefore, the first complete analytical solution was made possible for estimating the critical two-phase flow rate, including slip between the two phases. The pressure profiles for runs at critical flow were all cha… more
Date: October 1, 1962
Creator: Fauske, H. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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