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Development of the simplified MOX pellet fabrication process (short process); Improvement of MOX powder lowability

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牧野 崇義; 沖田 高敏; 加藤 良幸; 栗田 勉; 高橋 芳晴; 青野 茂典

Makino, Takayoshi; Okita, Takatoshi; Kato, Yoshiyuki; Kurita, Tsutomu; Takahashi, Yoshiharu; Aono, Shigenori

従来のMOX燃料製造コストを大幅に低減し得るショートプロセスと呼ばれる新たなペレット製造プロセスの開発を進めている。MH粉末は微粉末で流動性が悪いため、軽水炉に比べ細い高速炉用の成型金型にそのまま充てんしペレット化することは困難である。本試験では、2種類の方法でMH粉末の流動性を改良するためのホット試験を実施し、ペレット品質を評価した。

A simplified MOX pellet fabrication process, called short process, has been developed to drastically reduce fuel fabrication cost.The MH powder has characteristic of fine particle and low flowability. It is difficult to pelletize the MH powder directly without granulation into smaller size FR pellet compared with LWR fuel. Therefore, small-scale hot tests to improve the flowability of the MH powder has been carried out using two kinds of methods, and quality of the pellet was evaluated.

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