Author/Authors :
Masaki، نويسنده , , K and Taniguchi، نويسنده , , M and Miyo، نويسنده , , Y and Sakurai، نويسنده , , S and Sato، نويسنده , , K and Ezato، نويسنده , , K and Tamai، نويسنده , , H and Sakasai، نويسنده , , A and Matsukawa، نويسنده , , M and Ishida، نويسنده , , S and Miya، نويسنده , , N، نويسنده ,
Abstract :
A flat carbon fiber composite (CFC) tile mock-up with screw tubes, which have helical fins like a nut, was fabricated aiming at further improvement of the heat removal performance of the cost-effectively manufactured divert or target for JT-60SC (modified JT-60 as a superconducting coil tokamak). The heat removal performance of the mock-up was successfully demonstrated on the JAERI Electron Beam Irradiation Stand. The estimated heat transfer coefficient of the screw tube at the non-boiling region was roughly three times higher than that of the smooth tube. This corresponds to 1.5 times that of the swirl tube. A heat cycle test of 10 MW/m2 showed that the mock-up with the screw tubes could withstand for 1400-cycles. These results indicate that the divertor target plate with the flat CFC tile and the screw tube can be a promising candidate for the JT-60SC divertor target.
Keywords :
CFC , Cu-alloy heat sink , Brazing , Non-boiling region , Heat transfer coefficient , Screw tube , High heat load , Heat cycle test , Divertor target
