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Report No.

Development of fission product chemistry database ECUME for improved source term estimation method, 3; Thermodynamic dataset

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

Thermodynamic data of cesium compounds with boron and silicon are included in the thermodynamic dataset (TM) of ECUME. Chemical forms and fractions of cesium compounds formed in high temperature regions of nuclear reactors and revaporization amount of Cs chemisorbed onto stainless steel can be more accurately estimated by using the TM of ECUME. Incorporation of ECUME into severe accident analysis codes can cope with chemical behaviors of FPs influencing their release and transport behaviors and can be expected to improve source term estimations.



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