PELLETIZED BODY OF URANIUM DIOXIDE AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide pelletized bodies of uranium dioxide, and to provide a method for manufacturing them which make it possible to obtain MOX pellets that have the pellet metallograph smiliar to those manufactured in Europe. SOLUTION: In the method for manufacturing pelletized bodies of...

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Hauptverfasser: YOSHIMURA TADAHIRO, TAMAKI YOSHIHISA, SAKAIHARA MOTOHIRO
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide pelletized bodies of uranium dioxide, and to provide a method for manufacturing them which make it possible to obtain MOX pellets that have the pellet metallograph smiliar to those manufactured in Europe. SOLUTION: In the method for manufacturing pelletized bodies of uranium oxide, the uranium oxide manufactured, by giving reducing roasting to uranyl fluoride generated through the dry hydrolysis of uranium hexafluoride is pulverized into particles whose average diameter is a few to 20 μm and the slurry of the pulverized uranium dioxide is made pelletized powder through the spray dry treatment of it; and in the pelletized bodies of uranium dioxide, the residual ratio of the particles is 100% after 200 tappings and the repose angle is 30° or below. COPYRIGHT: (C)2011,JPO&INPIT