Abstract
Rock column experiments were performed to examine the effects of matrix diffusion and hydrodynamic dispersion on the migration of radionuclides at the laboratory scale.
Tritiated water and chloride transportation was studied in intact mica gneiss and in altered more porous tonalite columns with narrow flow channels. The column diffusion properties were estimated prior to water flow experiments using the gas diffusion method with helium as the tracer gas. The numerical compartment model for advection and dispersion, with and without matrix diffusion, was used to interpret the tracer transport in the columns.
Matrix diffusion behavior was also distinguished from dominating hydrodynamic dispersion in rock column experiments at the slowest water flow rates.
Tritiated water and chloride transportation was studied in intact mica gneiss and in altered more porous tonalite columns with narrow flow channels. The column diffusion properties were estimated prior to water flow experiments using the gas diffusion method with helium as the tracer gas. The numerical compartment model for advection and dispersion, with and without matrix diffusion, was used to interpret the tracer transport in the columns.
Matrix diffusion behavior was also distinguished from dominating hydrodynamic dispersion in rock column experiments at the slowest water flow rates.
| Original language | English |
|---|---|
| Pages (from-to) | 165-173 |
| Journal | Journal of Contaminant Hydrology |
| Volume | 21 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 1995 |
| MoE publication type | A1 Journal article-refereed |
| Event | Proceedings of Fourth International Conference on Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere - Charleston, SC, United States Duration: 12 Dec 1993 → 17 Dec 1993 |