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

Electrorefining in the molten LiCl–KCl eutectic salt containing actinide (An) and rare-earth (RE) elements was conducted to recover An elements up to 10 wt% into liquid cadmium (Cd) cathode, which is much higher than the solubility of the An elements in liquid Cd at the experimental temperature of 7...

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Veröffentlicht in:Journal of nuclear materials 2006-10, Vol.357 (1), p.105-114
Hauptverfasser: Kato, Tetsuya, Inoue, Tadashi, Iwai, Takashi, Arai, Yasuo
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container_end_page 114
container_issue 1
container_start_page 105
container_title Journal of nuclear materials
container_volume 357
creator Kato, Tetsuya
Inoue, Tadashi
Iwai, Takashi
Arai, Yasuo
description Electrorefining in the molten LiCl–KCl eutectic salt containing actinide (An) and rare-earth (RE) elements was conducted to recover An elements up to 10 wt% into liquid cadmium (Cd) cathode, which is much higher than the solubility of the An elements in liquid Cd at the experimental temperature of 773 K. In the saturated Cd cathode, the An and RE elements were recovered forming a PuCd 11 type compound, MCd 11 (M = An and RE elements). The separation factors of element M against Pu defined as [M/Pu in Cd alloy (cathode)]/[M/Pu in molten salt] were calculated for the saturated Cd cathode including MCd 11. The separation factors were 0.011, 0.044, 0.064, and 0.064 for La, Ce, Pr, and Nd, respectively. These values were a little differed from 0.014, 0.038, 0.044, and 0.043 for the equilibrium unsaturated liquid Cd, respectively. The above slight differences were considered to be caused by the solid phase formation in the saturated Cd cathode and the electrochemical transfer of the An and RE elements in the molten salt.
doi_str_mv 10.1016/j.jnucmat.2006.06.003
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subjects Applied sciences
Energy
Exact sciences and technology
Fuels
Nuclear fuels
Preparation and processing of nuclear fuels
title Separation behaviors of actinides from rare-earths in molten salt electrorefining using saturated liquid cadmium cathode
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