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In the safety assessment of high level radioactive wasterepository, the radionuclide species with high mobility, suchas 99TcO–4,125I–, 36Cl–, and 79SeO2– 3 , are given the mostconcerned in the pre-safety assessment [14–17]. The bentonite in Gaomiaozi county China (GMZ bentonite) hasbeen selected as the backfill material for the high level radioactive waste repository. The effective/apparent diffusioncoefficient, De/Da, porosity, εtot and distribution coefficient,Kd, are the fundamental parameters in modeling the radionuclide transport behaviors for a safety assessment of the repository. |
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