Fundamental test of crystallization process; Experience on behavior of FPs in crystallization process by using irradiated MOX fuel

Kaji, Naoya; Nakamura, Kazuhito; Nomura, Kazunori  ; Shibata, Atsuhiro  ; Yano, Kimihiko ; Washiya, Tadahiro ; Kitajima, Takafumi; Koizumi, Tsutomu

For the purpose of obtaining DFs of the short-life FPs by analysis in the hot experiment, fundamental test of crystallization process was carried out using Fast Experimental Reactor "JOYO" irradiated fuel. In this experiment, DFs of nuclides analyzed by analysis except Cs (Such as Ru-106, Ce-144, Pr-144) and Pu were evaluated to be about 100. It was suggested that there is the condition in which Pu-Cs double salt does not be formed, although DF of Cs had been very low in the past experiments because of forming Pu-Cs double salt.