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Recovery of plutonium and uranium into liquid cadmium cathodes at high current densities

高電流密度での液体カドミウム陰極へのプルトニウム及びウランの回収

加藤 徹也*; 魚住 浩一*; 井上 正*; 白井 理*; 岩井 孝; 荒井 康夫

Kato, Tetsuya*; Uozumi, Koichi*; Inoue, Tadashi*; Shirai, Osamu*; Iwai, Takashi; Arai, Yasuo

液体カドミウム陰極中にプルトニウム及びウランを高電流密度で回収する溶融塩電解試験を実施した。陰極電流密度101mA/cm$$^{2}$$の電解では、陰極中に10.4wt.%のプルトニウム及びウランをほぼ100%の電流効率で回収できた。陰極電流密度156mA/cm$$^{2}$$の電解では、8wt.%まで回収したところで陰極電流が上昇し、るつぼの外周部に電析物が観察された。

Electrolysis experiments were carried to recover plutonium and uranium into liquid cadmium cathodes from molten salt at high cathode current densities. In the electrolysis at 101mA/cm$$^{2}$$, 10.4wt.% of heavy metals in the cathode was recovered at almost 100% of current efficiency. In the electrolysis at 156mA/cm$$^{2}$$, the cathode potential ascended after approximately 8wt.% of heavy metals was recovered and some deposit was observed outside of the crucible.

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