Experimental study on behavior of Cs in uranium crystallization of advanced aqueous reprocessing system with simulated dissolver solution

Shibata, Atsuhiro ; Yano, Kimihiko ; Kamiya, Masayoshi ; Nakamura, Kazuhito; Washiya, Tadahiro ; Chikazawa, Takahiro*; Kikuchi, Toshiaki*

Behavior of Cs in U crystallization process of advanced aqueous reprocessing system was investigated with simulated dissolver solution. Beaker-scale U crystallization experiments were carried out with some simulated dissolver solutions. The results show that possibility of generation of CsNO $_{3}$ ,Cs $_{2}$ UO $_{2}$ (NO $_{3}$ ) $_{4}$ or Cs-FP complex salt is small. Precipitation experiments of Cs-U(IV) complex salts were also carried out with nitrate solution of U(IV) and Cs. It was found that Cs-U(IV) complex salt was precipitated in higher acidity than 5 mol/dm $^{-3}$ . It is suggested that Cs-Pu(IV) precipitates can be generated in the U crystallization process, under specific solution condition.

Language	:	Japanese
Journal	:	Nihon Genshiryoku Gakkai Wabun Rombunshi
Volume	:	8
Number	:	3
Pages	:	p.245 - 253
Publication Year/Month	:	2009/09
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Paper URL	:	https://doi.org/10.3327/taesj.J08.050
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Keywords	:	no keyword
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Registration No. : AA20080937
JAEA Abstracts No. : 37001403
Paper Submission No. : 6419

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