Diffusion and sorption of cesium, strontium, and iodine in water-saturated cement

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Nucl. Technol.; (United States)

OSTI ID:6982185

Atkinson, A; Nickerson, A K

Diffusion and sorption in cementitious materials are important factors influencing radionuclide migration in radioactive waste disposal. Four different experimental techniques have been used to study these processes for Cs/sup +/, Sr/sup 2+/, and I/sup -/ ions in Sulphate Resisting Portland Cement paste saturated with water. The results of different experimental methods are compared and their relative merits discussed. The observations can be rationalized only by taking into account departures from the usual simple description of transport in porous media. These are that the cement pore structure has fast and slow diffusivity networks, that all ions do not have the same diffusibility, and that some ions (in this case I/sup -/) have nonlinear sorption isotherms. When these factors are taken into account, the present observations are also found to be compatible with the results of other studies. The most appropriate values of characteristic parameters for diffusion and sorption in this system are deduced.

• Research Organization: Atomic Energy Research Establishment, Harwell, Materials Development Div., Didcot, Oxfordshire OX11 ORA (GB)
• OSTI ID: 6982185
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 81:1; ISSN NUTYB
• 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
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
510300 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALI METALS
ALKALINE EARTH METALS
BUILDING MATERIALS
CEMENTS
CESIUM
DATA
DIFFUSION
ELEMENTS
ENVIRONMENTAL TRANSPORT
EXPERIMENTAL DATA
HALOGENS
INFORMATION
IODINE
ISOTHERMAL PROCESSES
MANAGEMENT
MASS TRANSFER
MATERIALS
MATERIALS TESTING
METALS
NONMETALS
NUMERICAL DATA
RADIOACTIVE WASTE DISPOSAL
RADIONUCLIDE MIGRATION
SORPTION
SORPTIVE PROPERTIES
STRONTIUM
SURFACE PROPERTIES
TESTING
WASTE DISPOSAL
WASTE MANAGEMENT