Development of fission product chemistry database ECUME for improved source term estimation method, 1; Dataset for chemical reaction kinetics

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

We developed the fission product chemistry database named ECUME (ffective hemistry database of fission products nder ultiphase raction) for the LWR severe accident. The dataset for chemical reaction kinetics of ECUME consists of main chemical reactions and their effective chemical reaction kinetic constants. This dataset has the advantages in kinetics evaluation of the effects of molybdenum and BWR control material boron on cesium and iodine chemistry. This can improve prediction accuracy of chemical forms and their fraction in lower temperature region such as a primary containment vessel and a reactor building.