抄録
Helium effects on the mechanical properties and microstructure of three low-activation structural materials are summarized based on the current understanding of the experimental data they have yielded. Void swelling of these low activation materials is not seriously enhanced by the presence of helium in their expected operating temperature regions. Degradation of the mechanical properties caused by helium is not considered to be serious up to regions of several tens of displacement per atom (dpa). The issues of material data collection for DEMO reactor design are discussed.
