Nuclear waste repositories in crystalline rock -- An overview of flow and nuclide transport mechanisms
- Royal Inst. of Tech., Stockholm (Sweden). Dept. of Chemical Engineering and Technology
Nuclides eventually escaping from nuclear waste repositories in crystalline rock will move with the seeping water in the fracture network. Most important nuclides interact physically or chemically with the rock and are expected to be considerably retarded allowing them to decay to insignificant concentrations. Velocity variations may allow some portions of the nuclides to move faster. Matrix diffusion and sorption on the surfaces of the rock are by far the most powerful retardation mechanisms and depend, in addition to the sorption and diffusion properties, directly on the magnitude of the flow wetted surface which is the contact surface between the mobile water carrying the nuclides and the fracture surfaces over which the nuclides diffuse into the matrix. A number of field experiments have been performed over the last 15 years to help validate the concepts and models and to obtain data. A number of such experiments are described and discussed in relation to the above issues.
- OSTI ID:
- 377895
- Report Number(s):
- CONF-941075--; ISBN 1-55899-253-7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FIELD TESTS
FLOW RATE
FRACTURED RESERVOIRS
GEOLOGIC FRACTURES
GROUND WATER
HYDRAULIC CONDUCTIVITY
HYDROLOGY
POROSITY
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTES
RADIONUCLIDE MIGRATION
RESERVOIR ROCK
ROCK-FLUID INTERACTIONS
SITE CHARACTERIZATION
SORPTIVE PROPERTIES
UNDERGROUND DISPOSAL