Design Progress and Analysis for ITER Thermal Shield

The thermal shield (TS) system of ITER plays the role of reducing thermal loads to the cold structures that operate at 4.5 K. This paper presents the results of the detail design of TS, which are the design of joints, design of cooling panels. The results of structural analysis and thermal analysis to support the detail design are also reported. The detailed design of joints is done to satisfy both structural stability of the TS and assembly and manufacturing feasibility. Structural analysis under various design loads was conducted in order to support the new joint design. Detailed design of cooling panels was performed to minimize panel deformation due to tube welding by applying a new tube attachment scheme and cooling line layout. The result of thermal analysis for the new design of cooling line layout is reported in this paper.