Fabrication and preparation of a high heat flux test with a mock-up for the first wall of the KO HCML TBM

Korea has proposed and designed a Helium Cooled Molten Lithium (HCML) Test Blanket Module (TBM) to be tested in the International Thermonuclear Experimental Reactor (ITER). Ferrite Martensite (FM) steel is used as the structural material and Helium is used as a coolant to cool the first wall and breeding zone. Liquid Lithium is circulated for a tritium breeding, not for a cooling purpose. Therefore, the speed of Lithium is very slow up to a few mm/sec. From the performance and safety analyses, the feasibility of this concept has been proven. The FW is an important component which faces the plasma directly and therefore, it is subjected to high heat and neutron loads. The FW is composed of a beryllium (Be) layer as a plasma facing material and Ferrite Martensite Steel (FMS) as a structure material. In order to develop the fabrication technology for a TBM structure, several mock-ups, especially for the first wall channels, were fabricated with a HIP (Hot Isostatic Pressing), which was developed similarly to the development of the ITER blanket FW in Korea. In the present paper, fabrication of a TBM FW mock-up and a high heat flux (HHF) test plan for confirming its integrity are presented