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Separation behaviors of actinides from rare-earths in molten salt electrorefining using saturated liquid cadmium cathode

LiCl-KCl溶融塩中において液体カドミウム陰極を用いた希土類元素共存下におけるアクチノイド元素の電解回収

加藤 徹也*; 井上 正*; 岩井 孝; 荒井 康夫

Kato, Tetsuya*; Inoue, Tadashi*; Iwai, Takashi; Arai, Yasuo

アクチノイド及び希土類元素を含むLiCl-KCl溶融塩中において、液体カドミウム陰極中に固溶限度を超える10wt%以上のアクチノイドを回収するための電解試験を実施した。飽和したカドミウム陰極中に、アクチノイド及び希土類元素はPuCd$$_{11}$$型のMCd$$_{11}$$を形成して回収された。(液体カドミウム陰極中のRE/Pu)/(塩中のRE/Pu)で定義されるPuに対するREの分離係数は、未飽和のカドミウムについて報告されている平衡値よりも若干大きめの値を示した。

Electrorefining in the molten LiCl-KCl eutectic salt containing actinides(An) and rare-earths(RE) was conducted to recover up to 10 wt% An into liquid Cd cathode, which is much higher than the solubility of An in liquid Cd at the experimental temperature. In the saturated Cd cathode, An and RE were recovered to form a compound of the PuCd$$_{11}$$ lattice, MCd$$_{11}$$. The separation factors of RE against Pu were defined as (RE/Pu in the Cd cathode)/(RE/Pu in the salt) and calculated for the saturated Cd alloy including MCd$$_{11}$$. The separation factors for the Cd cathodes were a little larger than the equilibrium values.

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パーセンタイル:1.63

分野:Materials Science, Multidisciplinary

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