Stationary transport of dissolved species in the backfill surrounding a waste canister in fissured rock: Some simple analytical solutions

Journal Article · Sat Feb 01 00:00:00 EST 1986 · Nucl. Technol.; (United States)

OSTI ID:5907489

Neretnieks, I

In a final repository for spent nuclear fuel, the waste canister may be surrounded by some backfill. For low-permeability backfills, the transport of dissolved species such as corrosive agents for radionuclides leached after canister penetration is faster by diffusion than by flow. In fissured rock the migrating species will have a large cross-section area for transport while in the bulk of the backfill, but a very small area for transport at the mouth of the fissure. A somewhat idealized physical model has been used as a basis for a mathematical model that has been solved analytically. It shows the influence of fissure widths, backfill thickness, and distance between fissures. Some calculations are performed using some geometrical configurations of interest. They show that the influence of fissure width on the transport rate is small.

• Research Organization: Royal Inst. of Tech., Dept. of Chemical Eng., S-100 44 Stockholm
• OSTI ID: 5907489
• Journal Information: Nucl. Technol.; (United States), Vol. 72:2
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
RADIOACTIVE WASTE DISPOSAL
RADIONUCLIDE MIGRATION
ROCKS
SOILS
SPENT FUELS
UNDERGROUND DISPOSAL
BACKFILLING
DIFFUSION
DISSOLUTION
FRACTURES
LEACHING
MATHEMATICAL MODELS
PERMEABILITY
RADIOACTIVE WASTE FACILITIES
ROCK MECHANICS
ROCK-FLUID INTERACTIONS
SPENT FUEL CASKS
STRUCTURAL MODELS
THICKNESS
CASKS
CONTAINERS
DIMENSIONS
ENERGY SOURCES
ENVIRONMENTAL TRANSPORT
FAILURES
FUELS
MANAGEMENT
MASS TRANSFER
MATERIALS
MECHANICS
NUCLEAR FACILITIES
NUCLEAR FUELS
REACTOR MATERIALS
SEPARATION PROCESSES
WASTE DISPOSAL
WASTE MANAGEMENT
052002* - Nuclear Fuels- Waste Disposal & Storage
510301 - Environment
Terrestrial- Radioactive Materials Monitoring & Transport- Soil- (-1987)