Accidental release characteristics of activated materials in inertial and magnetic fusion reactors

The short-term radioactivity of some candidate structural materials for fusion reactors (reference steels and non-ferrous “low activation” materials) has been analyzed in power relevant conditions of inertial and magnetic fusion energy (IFE and MFE) reactors. Materials are assessed with regard to accident safety, using an offsite dose-related criterion. It turns out that the best option for \IFE\ differs from that of MFE. For some materials in \IFE\ conditions, the potential off-site dose can be largest when radioactivity release occurs sometime during reactor operation rather than at the end of its lifetime