Swelling of F82H irradiated at 673 K up to 51 dpa in HFIR

Reduced-activation ferritic/martensitic steel, F82H (8Cr-2W-0.2V-0.04Ta-0.1 C), and variants doped with isotopically tailored boron were irradiated at 673 K up to 51 dpa in the high flux isotope reactor (HFIR). The concentrati ons of B-10 in these alloys were 4, 62, and 325 appm during HFIR irradiatio n which resulted in the production of 4, 62 and 325 appm He, respectively A fter irradiation, transmission electron microscopy (TEM) was carried out. T he number density of cavities increased and the average diameter of cavitie s decreased with increasing amounts of B-10. The number density decreased a nd the average diameter increased with increasing displacement damage. Swel ling increased as a function of displacement damage and He concentration. ( C) 2000 Elsevier Science B.V. All rights reserved.