Preliminary neutronics design of the dual-cooled lithium lead blanket for FDS-II

The dual-cooled lithium lead (DLL) blanket of the fusion power reactor named FDS-II is dual-cooled by helium gas and lithium lead (LiPb) eutectic which is also served as tritium breeder. The Reduced Activation Ferritic/Martensitic steel is selected as the main structure material. Preliminary neutronics optimization analysis was performed for the DLL blanket by using the home-developed multi-functional (transport/burnup/optimization) code system VisualBUS1.0 with its multi-group data library HENDL1.0/MG. The calculated results are presented and discussed with comparison to the results calculated by the code MCNP4C with the IAEA data library FENDL-2/MC.