Heterogeneous matrix diffusion in crystalline rock - implications for geosphere retardation of migrating radionuclides

摘要

As a basis for an analysis of the effect of rock heterogeneity on radionuclide migration in a single fracture, the geostatistics of the main properties governing solute transport in crystalline rock have been determined experimentally for two granitic rock types. The rock samples were collected at the Aspo Hard Rock Laboratory, Sweden and used to deduce the auto-covariance functios for the porosity, effective diffusivity and partition coefficient, k_d, and adsorption kinetics.