ACCIDENTAL RELEASE CHARACTERISTICS OF ACTIVATED MATERIALS IN INERTIALAND MAGNETIC FUSION-REACTORS

The short-term radioactivity of some candidate structural materials fo r 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 asse ssed with regard to accident safety, using an offsite dose-related cri terion. It turns out that the best option for IFE differs from that of MFE. For some materials in IFE conditions, the potential off-site dos e can be largest when radioactivity release occurs sometime during rea ctor operation rather than at the end of its lifetime.