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Report No.

Development of fission product chemistry database ECUME for improved source term estimation method, 2; Elemental model set

Suzuki, Eriko   ; Nakajima, Kunihisa  ; Nishioka, Shunichiro*; Miwa, Shuhei  ; Horiguchi, Naoki   ; Imoto, Jumpei ; Liu, J.  ; Karasawa, Hidetoshi; Osaka, Masahiko  

The elemental model set (EM) of ECUME consists of improved models which can be directly incorporated into the present severe accident analysis codes. The models of EM has advantages in considering various chemical conditions. The improved model for cesium (Cs) chemisorption has successfully reproduced the effects of Cs vapor concentration in gas phase and silicon content in stainless steel on the Cs chemisorption behavior. This improved model can contribute to more accurate estimation of Cs distribution in a high temperature area.



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