Present status and future prospect of the Russian program for fusion low-activation materials

The Russian Fusion Materials Program (1998-2000, Minatom of Russia) include s the study of low (reduced)activation V-Ti-Cr alloys, heat-resistant ferri tic-martensitic steels and beryllium. The focus of the vanadium alloy progr am is on the high purity and homogeneity of V-(4-20)Ti-(4-10)Cr ingots (30- 50 kg). The main compositions are V-(8-10)Ti-(4-5)Cr and V-4Ti-4Cr alloys. The focus of the steel program is on 10-12% Cr heat-resistant reduced-activ ation ferritic-martensitic steels (RAFMS). The focus of the beryllium progr am is on increasing production scale, decreasing impurity concentrations (d ecreasing of activation level), and new materials development, such as poro us (15-30% open porosity) Be and new grades of Be. (C) 2000 Elsevier Scienc e B.V. All rights reserved.