Permeability, swelling, and radionuclide-retardation properties of candidate backfill materials
Conference
·
OSTI ID:5718936
A backfill placed between a nuclear waste canister and the host geology of a nuclear waste repository can impede the migration of water through the waste package and retard the movement of radionuclides into the geologic formation. Hydraulic conductivities and swelling pressures are being determined as functions of the density of the compacted backfill, temperature, radiation dose, hydraulic head and the chemical composition of the permeating fluid. Bentonite clays and bentonite/sand mixtures have received initial emphasis. Sodium bentonite and calcium bentonite samples compacted to a dry density of 2.1 q/cm/sup 3/ had hydraulic conductivities in the range of 10/sup -12/ to 10/sup -13/ cm/s. In addition, batch distribution ratios (R/sub d/) for Sr, Cs, Am, Np, I, U and Tc have been measured for a number of candidate backfill materials. Both initial permeability and sorption studies have used a synthetic basaltic ground water.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5718936
- Report Number(s):
- PNL-SA-9645; CONF-811122-44; ON: DE82005921
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Journal Article
·
Fri Dec 31 23:00:00 EST 1982
· Nucl. Chem. Waste Manage.; (United States)
·
OSTI ID:6249954
Physical response of backfill materials to mineralogical changes in a basalt environment. [Sand-clay mixture containing 25% bentonite]
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·
Fri Dec 31 23:00:00 EST 1982
·
OSTI ID:5231180
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·
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·
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Related Subjects
052002* -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BACKFILLING
BENTONITE
CLAYS
DISPERSIONS
ENVIRONMENTAL TRANSPORT
FLUID MECHANICS
HYDRAULICS
MANAGEMENT
MASS TRANSFER
MECHANICS
MIXTURES
PERMEABILITY
RADIOACTIVE WASTE STORAGE
RADIONUCLIDE MIGRATION
SAND
STORAGE
UNDERGROUND STORAGE
WASTE MANAGEMENT
WASTE STORAGE
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BACKFILLING
BENTONITE
CLAYS
DISPERSIONS
ENVIRONMENTAL TRANSPORT
FLUID MECHANICS
HYDRAULICS
MANAGEMENT
MASS TRANSFER
MECHANICS
MIXTURES
PERMEABILITY
RADIOACTIVE WASTE STORAGE
RADIONUCLIDE MIGRATION
SAND
STORAGE
UNDERGROUND STORAGE
WASTE MANAGEMENT
WASTE STORAGE