Behavior of actinide elements and fission products in recovery of uranyl nitrate hexahydrate crystal by cooling crystallization method

冷却晶析法による硝酸ウラニル六水和物の回収に及ぼすアクチニド元素及び核分裂生成物の挙動

中原 将海; 小泉 務; 野村 和則  

Nakahara, Masaumi; Koizumi, Tsutomu; Nomura, Kazunori

照射済燃料溶解液を用いて冷却晶析法により硝酸ウラニル六水和物の回収におけるアクチノイド元素及び核分裂生成物の挙動を調べた。液体不純物は、結晶洗浄により概ね除去できたが、固体不純物は、結晶洗浄後も硝酸ウラニル六水和物結晶に同伴した。

Behavior of actinide elements and fission products in recovery of uranyl nitrate hexahydrate crystal by cooling crystallization method was examined with a dissolver solution of irradiated nuclear fuel. Although liquid impurities were almost removed by the crystal washing, solid impurities remained with the uranyl nitrate hexahydrate crystals after the crystal washing.