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Safety research of multi-functional reprocessing process considering nonproliferation based on an ion-exchange method

イオン交換法による核不拡散に関連した多機能分離プロセスにかかわる安全研究

小山 真一  ; 小澤 正基; 岡田 賢*; 黒澤 きよ子*; 鈴木 達也*; 藤井 靖彦*

Koyama, Shinichi; Ozawa, Masaki; Okada, Ken*; Kurosawa, Kiyoko*; Suzuki, Tatsuya*; Fujii, Yasuhiko*

イオン交換法に基づく簡易な分離プロセスを提案した。その溶離液には、塩酸,硝酸及びメタノールを用いる。本プロセスの工学展開には、安全な運転条件を確立しておく必要がある。構造材料に対する塩酸の腐食試験により、タンタル, ジルコニウム, ニオブ及びハステロイが良好な耐食性を示した。また、イオン交換樹脂と硝酸・メタノールの爆発安全にかかわる研究の結果、150$$^{circ}$$C以上の乾燥条件において、その反応性に留意すべきであることがわかった。

Simplified separation process was proposed based on ion-exchange technique. HCl, HNO$$_{3}$$ and MeOH were used as an eluent. To develop an engineering scale concept, it is indispensable to establish the condition for safety operation. Corrosion test of structural materials in the HCl was performed by using some metals. In this experiment, it was proved that the Ta, Zr, Nb and hastelloy have good endurance to HCl solution. Research of thermal hazard of pyridine-type ion-exchange resin, MeOH and HNO$$_{3}$$ media system was studied in the view point of fire and explosion safety. There is no hazardous reaction between IER/MeOH, HNO$$_{3}$$ media system. In the case of more than 150$$^{circ}$$C, we should pay attention to the exothermic reaction at dried condition NO$$_{3}$$-IER or IER/HNO$$_{3}$$ media system.

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