Development of simplified pelletizing process for fast reactor MOX fuels, 4; Design of uniform filling operation of raw granules into a compression mould for the production of fuel pellets

Hidaka, Jusuke*; Makino, Tadashi*; Akashi, Masatoshi* ; Shimosaka, Atsuko*; Shirakawa, Yoshiyuki*; Suzuki, Masahiro ; Ishii, Katsunori ; Segawa, Tomoomi ; Kato, Masato   

The large-scale particle method supporting the optimized design of die filling of MOX granule in the first process of the formation of pellet's microstructure influencing MOX fuel pellets characteristics has been developed. The optimized granule characteristics and die filling conditions have been cleared using the simulations. The die filling flow behavior obtained by simulations extremely corresponded with that observed from the high speed camera in the various operation conditions, and the reliable die filling simulations of the full-scale examinations have been developed. This simulation can be applicable the MOX pellet fabrication process by varying the WO granule characteristic parameter to MOX.