Fabrication of three kinds of small mock-ups for an ITER TBM First Wall

The Korea (KO) has developed liquid a breeder blanket and participated in the Test Blanket Module (TBM) program within the International Thermonuclear Experimental Reactor (ITER) with a Helium Cooled Molten Lithium (HCML) concept. Ferritic Martensitic Steel material is used as structural material for the TBM first wall (FW). In order to develop the fabrication method for the TBM FW, the various manufacturing and joining methods have been developed. In this study, three mock-ups were fabricated to verify the manufacturing of a 1/6-scale mock-up of the TBM FW and preliminary analyses were performed to design a manifold of a 1/6-scale mock-up for uniform flow in the channels. Using Ferritic Martensite Steel material, three kinds of small mock-ups were fabricated such as a cooling channel shape of straight, two cooling channels shape of straight, and a cooling channel shape of U-type. The small mock-ups were manufactured by wire cutting and machining for components of the mock-ups and a welding and HIP, at 1050 .deg. C and 100 MPa for two hours, were performed for bonding. The fabricated small mock-ups were performed pressure tests between the joints to evaluate bonding of the mock-ups