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2, Fig. 7 E E . Figure 9 23 bar. M. GAUTHRON 24 0 1. GENERAL COMPRESSOR MOTOR MANOMETER CONTROLLER FOR DECOMPRESSION AND EMPTYING OIL FROM PURGE CYLINDER WITH >& c HEATING CIRCUITS 6 -PYROMETER DIRECTING AND CONTROLLING SHELL OF CLADDER - 91 11 E i : s O N / EACH AUTOMATIC STOPPAGE- TIMING CONTROL ~. ~ - - -STOP - . - . MOTOR .. . -STOP HEATING - AUTOMAT IC DE COM PRESSOR Fig. 11-Small cladder. 1000 kg/cmz. 650°C. " 0 4 - L - FURNACE CLADDER SESSION II Na t ural-uran iurn Metallic Fuel Elements ..

Techniques involved in the preparation of uranium alloys by melting and involving not m o r e than 2 p e r cent of the alloying ingredient are presented. The fabrication of natural uranium fuel elements by rolling, swaging, and machining is described, along with the heat-treatment involved in these operations. The preparation of uranium-metal shapes utilizing powder -metallurgy techniques is also described. 1 INTRODUCTION The suitability and performance in atomic reactors of natural uranium fuel elements depends to a great extent upon the casting and fabrication history of the metal in the element.

07 wt. % at the bottom. 09 wt. 08 wt. % at the bottom. 4 Molybdenum-Uranium Alloys Table 3 shows the results of five coreductions6i8in which various combinations of molybdic oxide (Moos) with molybdenum metal were added to the UF4-Mg blend. The metal was used here a s a diluent in order to ensure that the higher alloy additions would not incur a dangerous heat evolution. No excess of molybdenum was added in calculating the charges. It is evident OF Mo-U ALLOY COREDUCTIONS Table 3-RESULTS Composition aim points, wt:% Mo Derby analyses, wt.

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Ansaldo A.1 Balilla by Gregory Alegi


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