Activation analysis for the HCSB-DEMO reactor in China

The Neutron induced activity and decay heat are very important for the nuclear design of fusion reactor. In this paper, activation analysis of DEMO reactor with helium-cooled solid blanket (HCSB-DEMO) was performed. Ceramics Li4SiO4 and Beryllium options were considered as tritium breeding material and neutron multiplier, respectively. Chinese low-activation ferritic steel (CLF-1) developed in South Western Institute of Physics (SWIP) was applied as structural materials of blanket. Activation analysis was performed using FDKR code with activation cross section data file FENDL/A-2.0. Neutron fluxes as the input of FDKR were calculated with MCNP Monte Carlo code and FENDL/MC-2.1 neutron cross section data. The activity inventories and decay heat in HCSB-DEMO were examined. The contributions of radionuclides of structural materials, Li4SiO4 and Beryllium in blanket were discussed, respectively.