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Report No.

Technological development of the particle size adjustment of dry recovered powder

Segawa, Tomomi ; Yamamoto, Kazuya; Makino, Takayoshi ; Iso, Hidetoshi ; Kawaguchi, Koichi ; Ishii, Katsunori ; Sato, Hisato; Fukasawa, Tomonori*; Fukui, Kunihiro*

In the MOX fuel fabrication process, the dry grinding technology of mixed oxide pellets have been developed for the effective use of nuclear fuel materials. To develop a technology to control the particle size of dry recovered powder, the performance of the buhrstone mill and the collision plate type jet mill were studied using a simulated powder of particle size distribution about 500 $$mu$$m. We found that the particle size can be controlled at the range of about 250 $$mu$$m or less by both by adjusting the clearance between the grinding wheels of the buhrstone mill, and the clearance and elevation angle of the clarification zone of the the collision plate type jet mill. And furthermore, the collision plate type jet mill is considered to be suitable for particle size control because the operating parameters of the classifier can be finely adjusted.



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