关键词: ITER, 包层第一壁, 初步设计, 有限元分析

Abstract:

ITER first walls (FWs) undertaken by China adopt a large number of welded joint structures, the cooling channel contains many welds which lead to high risk of leakage of cooling water, and there are key problems such as difficulty for replacement of the defective parts in the welding assembly. Based on the results of semi-prototype research and development, it needs to be changed and redesigned in the stage of full-scale prototype (FSP) manufacturing process qualification. Design key point is that the fingers adopt fixed structure of front dovetail slot and middle screw connection, and the finger pair adopts front welded pipe connection and middle pipe connector welded with central beam to form an internal cooling channel circuit. The structural thermal and elastoplastic analyses of the preliminary design model are carried out. The analysis results show that its temperature, displacement and strength are in the acceptance range. This structure can be used to further detail design of enhanced heat load first wall.

Key words: ITER, Blanket first wall, Preliminary design, Finite element analysis