Silicon carbide and the new low activation requirements for a fusion reactor first wall

摘要: Abstract The radioactive behaviour of silicon carbide is compared to that other structural materials proposed for fusion applications. This analysis takes into account short- and long-term issues like accident safety, maintenance waste management. Low activation criteria based on the compliance with radioactivity limits are proposed. According these criteria, steels can hardly be considered as possible low-activation materials. Even elementally-tailored reduced never fulfil completely all criteria. Vanadium alloys SiC in form a new ceramic matrix/ceramic fibre composite (“SiC/SiC”) must regarded most promising materials, far radiological/activation concerned. Some problems associated vanadium examined. SiC/SiC turns out an ideal material fulfilled. Attention given impurities.