Diffusion of radionuclides in clay-based ceramics

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:5784191

Ivanov, P A; Gulin, A N; Shatkov, V M; Shashukov, E A; Kuznetsov, B S

The diffusion coefficients of sodium-22, strontium-90, and cesium-134 in clay-containing ceramics of three types are determined by the method of integral residual activity. It is found that at the investigated temperatures the diffusion coefficients of the radionuclides decrease in the order sodium-22, cesium-134, strontium-90. Migration of cesium-134 in comparison with sodium-22 is characterized by substantially lower values of the preexponential factor and diffusion activation energy. It is shown that in the case of ceramic made up of 89% by mass cambrian clay and 11% by mass perlite, increase in relative moisture content of the samples from0.05 to 0.3% leads to substantial (by 2-3 orders of magnitude) growth of the diffusion coefficients of the radionuclides. Further increase in the relative moisture content has practically no effect on their diffusive mobility.

• OSTI ID: 5784191
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 30:1; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

052002* -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
AMORPHOUS STATE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CERAMICS
CESIUM 134
CESIUM ISOTOPES
CHALCOGENIDES
CHEMICAL ANALYSIS
CLAYS
COHERENT SCATTERING
DIFFRACTION
DIFFUSION
ENVIRONMENTAL TRANSPORT
EVEN-EVEN NUCLEI
HIGH-LEVEL RADIOACTIVE WASTES
HOURS LIVING RADIOISOTOPES
IGNEOUS ROCKS
INTERMEDIATE MASS NUCLEI
INTERMEDIATE-LEVEL RADIOACTIVE WASTES
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KAOLIN
LIGHT NUCLEI
MANAGEMENT
MASS TRANSFER
MATERIALS
MOISTURE
NUCLEI
ODD-ODD NUCLEI
OXIDES
OXYGEN COMPOUNDS
PERLITE
QUANTITATIVE CHEMICAL ANALYSIS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
RADIOISOTOPES
RADIOMETRIC ANALYSIS
RADIONUCLIDE MIGRATION
ROCKS
SCATTERING
SILICON COMPOUNDS
SILICON OXIDES
SODIUM 22
SODIUM ISOTOPES
STRONTIUM 90
STRONTIUM ISOTOPES
TEMPERATURE DEPENDENCE
UNDERGROUND DISPOSAL
VOLCANIC ROCKS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
X-RAY DIFFRACTION
YEARS LIVING RADIOISOTOPES