The diffusion coefficients of ~(22)Na, ~(90)Sr and ~(134)Cs in clay-based ceramics were determined by the integral residual activity method. It was established that the diffusion coefficients of radionuclides decreased, at the investigated temperature range, in the following order: ~(22)Na > ~(134)Cs > ~(90)Sr. The migration of ~(134)Cs, in comparison with the migration of ~(22)Na, was characterised by essentially the lowest values of the pre-exponential factor and of the activation energy of the diffusion process. It was shown that, in the case of a ceramic material containing 89
展开▼
