The diffusivity of 134Cs in the stainless steel was studied at between 680 and 870C by using standard sectioning techniques (table 109). It was found that the penetration distances were very limited, and decreased with decreasing O potential. It was concluded that Cs was not a fast diffusant, and that its penetration was very limited at low O potentials and depended upon the availability of defects such as excess vacancies or grain boundaries.

H.Matzke, S.Pickering: Journal of Nuclear Science and Technology, 1983, 20[3], 237-45