A Proposal of ITER vacuum vessel fabrication specification and results of the full-scale partial mock-up test

ITER真空容器製作法への提案及び実規模部分モデル試験結果

中平 昌隆; 武田 信和; 角舘 聡; 小野塚 正紀*

Nakahira, Masataka; Takeda, Nobukazu; Kakudate, Satoshi; Onozuka, Masanori*

ITER真空容器の構造と製作法は国際チームで検討されてきたが、製作上の課題を有し、コスト削減が望まれる。本論文では、日本の提案する製作法と現設計の差異を示し、実規模部分モデルにおける一連の製作方法を紹介する。また、実規模部分モデルの製作試験から得られた結果として、非破壊試験,溶接変形,製作上明らかとなった課題などを提示する。

The structure and fabrication methods of the ITER vacuum vessel have been investigated and defined by the ITER international team. However, some of the current specifications are very difficult to be achieved from the manufacturing point of view and will lead to cost increase. This report summarizes the Japanese proposed specification of the VV mock-up describing differences between the ITER supplied design. A series of the fabrication and assembly procedures for the mock-up are presented in this report, together with candidates of welding configurations. Finally, the report summarizes the results of mock-up fabrication, including results of non-destructive examination of weld lines, obtained welding deformation and issues revealed from the fabrication experience.