Neutronic optimal analysis for the transmutation of long-lived fission products in the blanket for the fusion-driven subcritical system

It is very important for transmutation of long-lived fission products (LLFP) due to the serious radioactive hazard of the LLFP from commercial fission reactors. Considering the developing level of LLFP isotopic separation technology, the chemical forms for transmutation of 99Tc,129I and 135Cs are presented. This paper discussed the transmutation effect of the different moderators on the burning efficiency. The dedicated dual-cooled long-lived radioactive waste transmutation blanket (DWTB) for the Fusion-Driven Subcritical system (FDS) has been considered to transmute LLFP. As the part of the DWTB conceptual design, the optimized LLFP compositions and form designs have been done to improve the performance of LLFP transmutation. Neulronics optimal calculation about LLFP transmutation has been carried out to compare the performances of different LLFP transmutation designs.