Structural design and analysis of dual-cooled lithium-lead blanket module for the fusion power reactor FDS-II

The structural scheme of Dual-cooled Lithium Lead( DLL) blanket module has been proposed for the fusion power reactor (named FDS-Ⅱ), whose basic concept is to use RAFM steel (e.g. CLAM steel) as structural material, liquid metal LiPb as both coolant and breeder, and SiCf/SiC composite material as flow channel inserts which serves as electrical and thermal insulators. In particular, the structure configuration of the blanket module is integrated considering breeding zone, channels of coolant, mechanical connections, maintenance, etc. Furthermore, the introduction of “” shape steel grids have two advantages: simplifying the coolant channels which is to be easily implemented, simplifying manufacturing processes and enhancing the reliability. The DLL blanket may achieve higher availability in coolant system, manufacturing and assembly compared with other liquid metal lithium-lead blankets.