On materials problems of the first wall in INTOR

In fusion reactors of the next generation, as for example INTOR, the first wall will be heavily damaged by fast neutrons. But its integrity will also be endangered by the erosion, due to fast neutrals and disruptions, and by the thermal fatigue, which is a consequence of the pulsed operation of these devices. Data on the interaction between radiation damage and fatigue are still scarce, therefore it is difficult to evaluate the lifetime of the first wall in these reactors. (orig.)