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Geology of the southern Guadalupe Mountains, Texas

Description: From Abstract: "This report deals with an area of 425 square miles in the western part of Texas, immediately south of the New Mexico line. The report describes the geology of the area, that is, the nature of its rocks, tectonics, and surface features, and the evidence that they give as to the evolution of the area through geologic time. Incidental reference is made to the geology of surrounding regions in order to place the area in its environment."
Date: 1948
Creator: King, Philip B.
Partner: UNT Libraries Government Documents Department

Chlorophyll and Photosynthesis

Description: No Description Available.
Date: December 30, 1948
Creator: Calvin, M. & Aronoff, S.
Partner: UNT Libraries Government Documents Department

Effect of Temperature and Reactivity Changes in Operation of the Los Alamos Plutonium Reactor

Description: The operation of the Fast Reactor is considered in terms of normal equilibrium conditions and normal shut-down. The proposed loading, control rod adjustment and subsequent "floating" operation are discussed. Safety devices and interlocks are described. Temperature and reactivity changes are examined with respect to various system failures, phase changes, and "flashing" of the reactor. Slow changes due to faulty slug cooling are also considered. The calculations were initially based upon 10 kw operation. Performance tests of the mercury system now indicate that 20-kw operation may be feasible. (D.E.B.)
Date: May 28, 1948
Creator: Hall, D.B. & Hall, J.H.
Partner: UNT Libraries Government Documents Department

Neutron Diffraction Studies

Description: No Description Available.
Date: October 22, 1948
Creator: Shull, C. G.; Wollan, E. O. & Marney, M. C.
Partner: UNT Libraries Government Documents Department

On Closed Shells in Nuclei

Description: It has been suggested in the past that special numbers of neutrons or protons in the nucleus form a particularly stable configuration.{sup1} The complete evidence for this has never been summarized, nor is it generally recognized how convincing this evidence is. That 20 neutrons or protons (Ca{sup40}) form a closed shell is predicted by the Hartree model. A number of calculations support this fact.{sup2} These considerations will not be repeated here. In this paper, the experimental facts indicating a particular stability of shells of 50 and 82 protons and of 50, 82, and 126 neutrons will be listed.
Date: February 1, 1948
Creator: Mayer, M. G.
Partner: UNT Libraries Government Documents Department


Description: The initial phase of the pressure drop testing program on proposed fuel element design shapes for the high-temperature, gas-cooled power reactor, has been completed with the compilation of pressure drop data for the flatplate riveted-assembly type of unit, the ribbed cylinder type, the single bent-plate type both with and without rivets, the 13 hexagon-6 pentagon type, and the 7-hole graphite type. This phase of the program was conducted for the purpose of determining the equivalent skin-friction pressure drop factor for composite fuel element crosssections, and for determining the joint loss factors for varying degrees of misalignment of the fuel units in the fuel channels of the pile. (auth)
Date: July 1, 1948
Creator: Segaser, C.L.
Partner: UNT Libraries Government Documents Department


Description: No Description Available.
Date: August 1, 1948
Creator: Woodard, R. W.; Twichell, L. P.; Lee, D. A.; Petretzky, P. B.; Drury, J. S.; Williams, R. D. et al.
Partner: UNT Libraries Government Documents Department

Impregnation of Graphite With Uranium Compounds for Use as Fuel Rod Materials

Description: A process hns been developed for impregnating graphite with U/sub 3/O/ sub 8/ in connection with the proposed use of such material for fuel rod elements in the Daniels' High Temperature Pile. The process as developed consists of five steps: Fabrication of the graphite in the desired shape; Pretreatment of the graphite by boiling in water and then firing in helium at 800 deg C; Impregnating the graphite by first evacuating the pretreated material and then admitting an aqueous uranyl nitrate solution whose concentration is etermined by the final uranium content desired in the raphite; Drying the impregnated graphite slowly under quilibrium conditions; and Conversion of the uranyl itrate to U/sub 3/O/sub 8/ by firing in helium at 800 deg C. By this process fuel rod elements have been made which contain as much as 19% U/sub 3/O/sub 8/ distributed uniformly throughout the graphite. The considerations leading to the choice of this process are discussed in this report, together with the alternate procedures which were investigated. (auth)
Date: February 1, 1948
Creator: Kanter, M.A.
Partner: UNT Libraries Government Documents Department


Description: Using an apparatus described in a preceeding paper the reaction rate of the fluorination of UO/sub 2/ by HF was measured under the condition of a gradually increasing temperature. UF/sub 4/ made in this way did not show caking although final reaction temperatures ranged as high as 700 deg C. The rate of reaction was found to be greater than the rate measured under isothermal conditions at the highest temperature attained during the continuous increase as long as this final temperature was above 550 deg C. (auth)
Date: July 19, 1948
Creator: Kuhlman, C.W.
Partner: UNT Libraries Government Documents Department
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