AbstractThe induced activity of first wall materials was calculated and evaluated from the viewpoints of surface dose rate and waste disposal. Several properties of selected candidate materials, such as FeCrWV alloys, W single crystals, and C/SiC components, were examined. The optimum composition of ferritic steel is 9Cr-1W with respect to phase stability and toughness. Tungsten single crystals prepared with a secondary recrystallization showed a sufficient bend ductility at room temperature. It was also confirmed that a CVI method could be used to produce C/SiC composites with an improved ductility.
第一壁材料の誘導放射能を、表面線量率と廃棄物処分の観点から計算し、評価した。選択された候補材料、例えばFe-Cr-W-V合金、W単結晶、C/SiC部品のいくつかの特性を調べた。フェライト鋼の最適組成は、相安定性と靭性の観点から9Cr-1Wである。二次再結晶で作製したタングステン単結晶は、室温で十分な曲げ延性を示した。また、CVI法を用いることで、延性が改善されたC/SiC複合材料を製造できることが確認された。