7 resultados para Metals build-up

em University of Michigan


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17th ed., rev. and enl. 120th thousand.

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The generation of heat due to the radioactive decay of plutonium in the form of plutonium dioxide stored in wooden containers is considered. The results of two experiments in which plutonium dioxide is placed inside wooden blocks and the temperature rise measured at various points is reported. Heat transfer calculations are then performed to show that the data obtained are those which would be expected, i.e., that Fourier's Law adequately describes the situation. The heat build up in a proposed wood moderated shipping container is calculated, using some of the assumptions verified in the described experiments.

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To "encourage the effort to build up an exponent of pure southern literature in the heart of the Old Dominion: an organ of southern ideas, southern tastes, and southern sentiment."

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The hot isostatic pressing process has been applied at temperatures up to 1500°C for the fabrication of high temperature fuel rods composed of UO₂ clad in columbium and UO₂ in iron-aluminum type alloy. The fused UO₂ powder apparently becomes quite plastic at temperatures above 1200°C and can be isostatically compacted at 1500°C to 98% of its theoretical density. Columbian tubes particularly lend themselves to the fabrication of fuel rods by simultaneously compacting and cladding UO₂ powders in the tubes, but the cast iron-aluminum type alloy that was used was unsatisfactory because of its brittleness.

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"Materials Laboratory, Contract no. AF33(616)-5428, Phase B, Project no. 7351."