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Chlorination of UO$$_{2}$$, PuO$$_{2}$$ and rare earth oxides using ZrCl$$_{4}$$ in LiCl-KCl eutectic melt

溶融塩中におけるZrCl$$_{4}$$を用いたUO$$_{2}$$, PuO$$_{2}$$及び希土類酸化物の塩化物への転換

坂村 義治*; 井上 正*; 岩井 孝; 森山 裕丈*

Sakamura, Yoshiharu*; Inoue, Tadashi*; Iwai, Takashi; Moriyama, Hirotake*

使用済酸化物燃料の乾式再処理に金属電解法を適用する方法として、溶融塩中で塩化ジルコニウム(ZrCl$$_{4}$$)を用いた新しい塩化法を開発した。UO$$_{2}$$, PuO$$_{2}$$及び希土類酸化物(La$$_{2}$$O$$_{3}$$, CeO$$_{2}$$, Nd$$_{2}$$O$$_{3}$$ and Y$$_{2}$$O$$_{3}$$)をLiCl-KCl溶融塩中、500$$^{circ}$$CにおいてZrCl$$_{4}$$と反応させると、金属塩化物溶液とジルコニウム酸化物沈殿を生じた。系を静止状態に保つと、ジルコニウム酸化物沈殿を分離することができた。

A new chlorination method using ZrCl$$_{4}$$ in a molten salt has been investigated for the pyrometallurgical reprocessing of spent oxide fuels. UO$$_{2}$$, PuO$$_{2}$$ and rare earth oxides(La$$_{2}$$O$$_{3}$$, CeO$$_{2}$$, Nd$$_{2}$$O$$_{3}$$ and Y$$_{2}$$O$$_{3}$$) were allowed to react with ZrCl$$_{4}$$ in a LiCl-KCl eutectic salt at 500$$^{circ}$$C to give a metal chloride solution and a precipitate of ZrO$$_{2}$$. By keeping the system quite still, the solution settled so that the ZrO$$_{2}$$ precipitate could be separated.

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パーセンタイル:14.4

分野:Materials Science, Multidisciplinary

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