Fundamental research on fission product chemistry under a severe accident

Miwa, Shuhei  ; Nakajima, Kunihisa  ; Di Lemma, F. G.; Suzuki, Chikashi ; Yamashita, Shinichiro   ; Okane, Tetsuo  ; Takai, Toshihide  ; Takada, Juntaro; Furukawa, Tomohiro  ; Osaka, Masahiko  

JAEA conducts a fundamental research on fission product (FP) chemistry to construct the database of FP chemistry at each stage of nuclear power plants and improve FP chemistry models which will be reflected to the improvement of FP release and transport models. Main target of FP elements are Cs and I, and the evaluation of FP and B release kinetics, development of direct measurement technique of FP chemical form, the evaluation of Cs chemisorption behavior to SS, upgrading the thermodynamic database are carried out with focuses on Mo and BWR control material, boron carbide (BC).