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金属電解法乾式再処理プロセス実用化研究開発,3; MOX還元物を用いた電解精製シーケンス試験

Development of pyro-metallurgical reprocessing, 3; Sequential test for electro-refining using U-Pu alloy

倉田 正輝*; 矢作 昇*; 北脇 慎一; 仲吉 彬; 福嶋 峰夫

Kurata, Masaki*; Yahagi, Noboru*; Kitawaki, Shinichi; Nakayoshi, Akira; Fukushima, Mineo

高速炉用MOX燃料を還元して製造したU-Pu合金を陽極に、固体陰極3バッチ(U回収)+Cd陰極1バッチ(U-Pu-Am回収)を連続した電解精製試験を行った。工程全体で核物質のマスバランスが維持されること、U製品中のPuとAm濃度は1ppm以下であること、Uが酸素不純物のゲッターとして機能すること等を示した。

Sequential test for electro-refining using U-Pu alloy that was obtained by reduction of MOX pellets was performed. The test was consisted of four electrolysis using three solid cathodes and a liquid cadmium cathode. Test results shows that (1) material balance of nuclear materials were satisfactorily closed in whole process, (2) concentration of Pu and Am in uranium products were less than 1 ppm respectively, (3) U metal reacted with oxygen impurities in media as an oxygen getter.

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