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

Rizaal, M. ; 三輪 周平 ; 鈴木 恵理子  ; 井元 純平 ; 逢坂 正彦 ; Gou$"e$llo, M.*

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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