Impact of impurity in transmutation cycle on neutronics design of accelerator-driven system

Sugawara, Takanori  ; Katano, Ryota   ; Tsujimoto, Kazufumi 

This study aims to investigate the impact of impurities in the transmutation cycle on the ADS neutronics design. For the uranium from the partitioning, the accompaniment of 20 wt.% U against the Pu weight is acceptable although the MA transmutation amount will be decreased slightly. For the rare earth (RE) from the partitioning, the accompaniment of 5 wt.% RE against the MA weight is allowable. In the reprocessing, the decontamination factor, DF=10 for RE is enough from the viewpoint of the neutronics design.