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First Quarterly Report on the Reductions of Uranium Oxides

Description: The preliminary results of a program designed to evaluate methods for preparing uranium hydride from the various oxides of uranium are presented. The apparatus has been designed and constructed for the purpose of carrying out batch reductions under a variety of conditions employing calcium hydride, calcium metal and magnesium metal as the reducing agents. Since the separation of the alkaline earth oxides, present as by-products in the furnace products, promises to be the most difficult problem encountered in this investigation, a major portion of thetime during this past quarterly period has been directed toward the development of a suitable leach method. No investigation of the reduction methods has been possible to date because of the inability to obtain SF materials. A brief outline of the future work is included. (auth)
Date: October 10, 1952
Creator: Bragdon, R. W.
Partner: UNT Libraries Government Documents Department

The Sodium Hydroxide-Sodium Oxide-Sodium-Sodium Hydride-Hydrogen System

Description: Sodium hydride dissolves in and reacts with molten NaOH to give an equilibrium mixture of NaH, NaOH, Na/sub 2/O, Na, and H. In the case where there is a gaseous phase (hydrogen) and only one condensed phase, the system is defined by the temperature, pressure, and one composition variable. The equilibriu, H/ sub 2/ pressure, which is a measure of the H/sub 2/ activity within the melt, was determined as a function of the composition of the condensed phase(s) at 600, 700, and 500 deg for equilibrium mixtures with original compositions of 2.5 to 97.5, 5.0 to 95.0, l0.0 to 90.0, and 20.0 to 50.0 mole% NaH-NaOH. The equilibrium H/sub 2/ pressure-composition isotherms obtained by removing measured increments of H/sub 2/ were reproduced by reabsorbing H/sub 2/. Results for the 5.0 mole % NaH mixture were duplicated by starting with an equivalent quantity of either Na in NaOH or Na/sub 2/O in NaOH, and reacting with measured increments of H/sub 2/. The system is discussed in relation to the interdependent reactions involved, the phase rule, the thermodynamics of certain reactions, and experimental techniques employed. (auth)
Date: March 1, 1957
Creator: Kelly, H. C.; Sullivan, E. A. & Johnson, S.
Partner: UNT Libraries Government Documents Department

Letter Report No. 14 Under AEC Contract AT(30-1)-2298

Description: Data for the rate of hydrogen permeation through nickel with 0, 2, and 4% copper added, at 640 to 800 deg C and 1.1.to 2 atm pressure are given. The system of nickel with 1% copper developed a high-temperature leak and had to be dismantled. Graphs plotted with this data are also included. (M.C.G.)
Date: June 1, 1960
Creator: Rudd, D. W.
Partner: UNT Libraries Government Documents Department