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Report No.

Study on revaporization of deposited CsI from stainless steel 304 surface in high-temperature steam atmosphere

Rizaal, M.   ; Miwa, Shuhei  ; Suzuki, Eriko   ; Imoto, Jumpei ; Osaka, Masahiko  ; Gou$"e$llo, M.*

We experimentally investigated the revaporization behavior of deposited CsI on the surface of structural material such as stainless steel in a subsequent high-temperature steam flow (i.e., reflood of the reactor at severe accident). The experimental results showed that the deposited CsI at 850 K could be vaporized, leaving the formation of Cs$$_{2}$$CrO$$_{4}$$ on that once-deposited surface and consequently giving an increase of iodine release observed below 400 K.



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