Diffusion and permeation of hydrogen in low-activation martensitic stainless steel – effect of irradiation

Abstract The effect of irradiation on permeation and diffusion of hydrogen in low-activation martensitic stainless steel, F82H-mod, was investigated in three experiments: 1. Permeation and diffusion of H 2 in pre-irradiated specimens, showing decrease of both the properties with increasing dose. The diffusion results were evaluated in terms of a saturable-trap-model. 2. Permeation of deuterium under simultaneous proton irradiation, showing enhancement of permeation by irradiation. 3. Diffusion of protons which were implanted to various depths in a 800 μm foil. These results were compared to H 2 gas diffusion in virgin and pre-irradiated material.