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Report No.

Systematic chemical decontamination using IF$$_7$$ gas

Hata, Haruhi  ; Yokoyama, Kaoru; Sugitsue, Noritake

IF$$_7$$ treatment technique belongs to the system decontamination technology. It has the high performance decontamination technique for the plant that deposits the uranium intermediate fluoride, for example, UF$$_4$$, UF$$_5$$, U$$_2$$F$$_9$$, and U$$_{4}$$F$$_{17}$$, which exist in the uranium enrichment plant by the Gas Centrifuge. The characteristics of IF$$_7$$ treatment, the secondary waste is just an IF$$_5$$ and little adsorbent. In addition, this IF$$_5$$ is possible to reuse as a materials for makings new IF$$_7$$ gas. According to that IF$$_7$$ treatment is the simple method using chemical reaction, we hardly need to care about secondary reaction with the exception of the reaction with IF$$_7$$ gas and the uranium intermediate fluoride. This is very important feature when applying to a large-scale plant.



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