Evaluation of diffused and retained actinide inventory in SiC layer in HTGR spent fuel

Sasaki, Koei   ; Fukaya, Yuji   ; Tachibana, Yukio ; Sawa, Kazuhiro*

In order to quantitatively clarify whether the diffused actinide in the SiC layer in the spent fuel can be a critical factor of the low recovery rate in the entire HTGR fuel reprocessing, the amount of diffused actinide in the SiC layer was calculated in the case of GTHTR300 fuel based on the elemental analysis data of post irradiation examinations. As a result, it was found that the amount was below the recovery loss reduction target of 0.1% for environmental load reduction.