核融合炉用超伝導マグネット構造の構造材料規格の開発

概要

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To confirm design and construction process of large superconducting magnets for fusion application, a rules on superconducting magnet structure has been established as part of a code for fusion facilities in JSME standard. The code consists of Quality assurance, Materials, Design, Fabrication and installation, Non-destructive examination, Pressure and leak testing and Glossary. This code is the world first document covering all manufacturing processes of the large scale superconducting magnet for fusion. This report deals with “Structural materials” in the code. Although the code specifies all materials applicable to the magnet construction, the cryogenic structural materials will be focused and the outline of the contents will be expounded here. A special point described in the code is skipping of mechanical tests at cryogenic temperature. When the chemical composition and mechanical property at ambient temperature meet with the code requirements, according to the code and when any special and additional heat treatments are not performed, the cryogenic mechanical tests are not required.