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Fabrication and high heat flux testing of a full poloidal length blanket/first wall mock-up of Test Blanket Module (TBM) for ITER have successfully been performed in JAEA.Aug. 28, 2008JAEA has succeeded sound structure of full poloidal length first wall mock-up for the water cooled solid breeder (WCSB) test blanket module (TBM) with sound performance in a high heat flux test in real heating condition in ITER. Japan is developing a WCSB Blanket as a primary candidate of the TBM. In the development program of the breeding blanket for DEMO, ITER Test Blanket Module (TBM) test program, by which prototypical DEMO Blanket module is tested under the fusion environment of ITER, is the most important milestone. Toward the realization of the WCSB TBM testing, it is important to show the quality of the TBM box structure. From this view point, fabrication technology development showed important progress. A full poloidal length first wall mock-up for the water cooled solid breeder test blanket module (WCSB-TBM) has been successfully fabricated by hot isostatic pressing (HIP) method. The HIP joining of such large and complicated wall structure as the First Wall of Blanket requires highly matured techniques, and has never been succeeded yet until our mockup. The HIP process was performed at temperature of 1100º for 2h under 150MPa pressure. The mock-up is made of reduced-activation ferritic/martensitic steel (F82H) and has 15 square (8 x 8mm) cooling channel inside. Furthermore, high heat flux test of the mock-up was carried out under heat flux of 0.5MW/m2 to simulate the ITER first wall loading condition. The coolant temperature and the pressure were 300º and 15MPa, respectively. No excessive deformation and no hot spots due to delamination of the HIP bonded interface were observed in this test up to 80 cycles. |
