Two novel low-activation materials for a fusion reactor first wall and
blanket structures are examined: a vanadium- based alloy (V-4Cr-4Ti)
and a SiC/SiC composite. The comparison concerns low-activation proper
ties, and stresses the importance of data on the impurity content. In
particular, new data about impurity levels in vanadium alloys show tha
t long-term activation of such materials may be strongly reduced if ce
rtain impurities are kept under control. (C) 1998 Elsevier Science B.V
. All rights reserved.