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Vibro-packing experiment of non-spherical uranium dioxide particles with spherical metallic uranium particles

Matsuyama, Shinichiro*; Ishii, Katsunori ; Hirai, Mutsumi*; Tsuboi, Yasushi*; Kihara, Yoshiyuki

Japan Atomic Energy Agency has been developing vibro-packed fuel as one candidate for commercial fast breeder reactor fuels. In this study, vibro-packing experiments were carried out to investigate particle behavior during vibro-packing and particle distribution after vibro-packing in a cladding tube. Non-spherical uranium dioxide particles and spherical metallic uranium particles were used to simulate mixed oxide particles and oxygen getter particles. These experiments revealed that it is important to feed each size of fuel particles uniformly into a cladding tube without size segregation in order to obtain a vibro-packed fuel pin with oxygen getter particles uniformly dispersed. "Simultaneous feeding" with volumetric powder feeders is useful to obtain a vibro-packed fuel pin with oxygen getter particles uniformly dispersed.

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Category:Nuclear Science & Technology

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