Speaker
Mr
Kenichiro Kino
(Nucler Development Corporation)
Description
In the safety assessment of radioactive waste repository, it is important to evaluate the migration behavior of long half-life radionuclides in the disposal environment. It was reported that insoluble C-14 was generated in PWR. However, the knowledge about the chemical form of C-14 is little.
In this study, particles including C-14 collected from the coolant filters in PWR were analyzed by TG/MS to identify the chemical forms of these particles. In addition, C-14 in released gases and the residue in TG measurements were also investigated.
Resultantly, it was revealed that fragments which were considered to be organic compounds derived from the ion-exchange resin were detected from the released gas, and that majority(>90%) of C-14 inventory were detected in the residue after the inert gas heating.
While the chemical forms of C-14 in the residue are not clarified, it is suggested that insoluble C-14 may exist in the thermo-stable compounds.
Primary author
Mr
Kenichiro Kino
(Nucler Development Corporation)
Co-authors
Mr
Akira Sakashita
(Mitsubishi Heavy Industries)
Dr
Kotaro Nakata
(CRIEPI)
Mr
Shintaro Tsuji
(Kansai Erectric Power Co, INC)
Mr
Toshikazu Waki
(Kansai Electric Power Co, INC)
