Diffusivities in crystalline rock materials

Conference · Wed Jan 01 04:00:00 EST 1986 · Mater. Res. Soc. Symp. Proc.; (United States)

OSTI ID:5474420

Skagius, K; Neretnieks, I

The diffusion of non-sorbing species in different crystalline rocks and fissure coating materials has been studied. The results show that the effective diffusivity of iodide, Uranine and Cr-EDTA in rock materials with fissure coating material is of the same magnitude or higher than in granites and gneisses. The results also show that it is not possible to assign one value to the diffusivity of a rock from a given area. The variations in properties are too large. The estimated effective diffusivity of iodide in rocks without fissure coating material was found to be in the range 1 x 10/sup -14/ m/sup 2//s to 70 x 10/sup -14/ m/sup 2//s. To simulate the stress that exists in the bedrock at large depths, diffusion experiments with iodide and electrical resistivity measurements in rock materials under mechanical stress have been performed. It was found that the diffusivity in rock samples at 300 - 350 bars, stress was reduced to 20 - 70% of the value in samples under atmospheric pressure.

• Research Organization: Royal Institute of Technology, Stockholm, Sweden
• OSTI ID: 5474420
• Report Number(s): CONF-850995-
• Conference Information: Journal Name: Mater. Res. Soc. Symp. Proc.; (United States) Journal Volume: 50
• Country of Publication: United States
• Language: English

Related Subjects

052002 -- Nuclear Fuels-- Waste Disposal & Storage
053000* -- Nuclear Fuels-- Environmental Aspects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
510301 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- Soil-- (-1987)
54 ENVIRONMENTAL SCIENCES
ACTINIDE COMPOUNDS
AMINO ACIDS
CARBOXYLIC ACIDS
CHELATING AGENTS
CHROMIUM COMPOUNDS
DIFFUSION
EDTA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENVIRONMENTAL TRANSPORT
FAILURES
FRACTURES
GNEISSES
GRANITES
HALIDES
HALOGEN COMPOUNDS
IGNEOUS ROCKS
IODIDES
IODINE COMPOUNDS
MANAGEMENT
MASS TRANSFER
METAMORPHIC ROCKS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PLUTONIC ROCKS
RADIOACTIVE WASTE DISPOSAL
RADIONUCLIDE MIGRATION
ROCKS
TRANSITION ELEMENT COMPOUNDS
UNDERGROUND DISPOSAL
URANIUM COMPOUNDS
WASTE DISPOSAL
WASTE MANAGEMENT