The effects of neutron spectrum on tensile properties of the low-activation
martensitic steel F82H (8Cr-2WVTa) was examined using a thermal neutron sh
ield to tailor the neutron spectrum for steels irradiated in the high flux
isotope reactor (HFIR). The yield stresses of spectrally tailored specimens
irradiated in HFIR to 5 dpa at 300 degreesC and 500 degreesC are on trend
lines obtained from unshielded irradiation in HFIR. No significant effect o
f the neutron spectrum on tensile properties could be detected. (C) 2000 El
sevier Science B.V. All rights reserved.