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Report No.
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Safety research of multi-functional reprocessing process considering nonproliferation based on an ion-exchange method

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

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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