Fabrication and high heat flux test preparation of a half scale sub module mock up for the TBM first wall

Korea (KO) has developed and participated in the Test Blanket Module (TBM) program in the ITER, in which Ferritic martensitic (FM) steel was used as the structural material for the TBM first wall (FW). To develop the fabrication method for the TBM FW and verify its integrity, a half scale sub module mock up was fabricated and integrity test has been prepared. Two manifolds for connecting with the water supplying system in high heat flux (HHF) test were fabricated and welded with the mock up. Pressure and He leak tests were successfully performed without any leak and failure. The flow rates in each channel were measured with the conventional ultrasonic sensor but it shows non uniform flow distribution at each channel differently from the estimation by ANSYS CFX. HHF test conditions were evaluated through the ANSYS CFX analysis considering the above measured flow rates in each channel and it shows non uniform temperature distribution of the FW surface. Now a new manifold design or modification of the fabricated one is being considered for a uniform flow distribution at each channel of the mock up