Abstract
The influence of oxygen on void formation in mono- and poly-crystalline vanadium, neutron irradiated to fluences up to 2.5 × 10 25 n/ m 2 ( E > 1 MeV) in the temperature range 673–1073 K, was experimentally investigated. The oxygen doped samples contained 850 appm oxygen initially, while the initial oxygen content of the pure samples was less than 40 appm. The oxygendoped materials in general show larger void concentrations but smaller voids, particularly in the mono-crystalline material, while the effect of oxygen on the void volume fraction is very small. Even at very high void concentrations, no indication of void lattice formation has been observed.
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