Migration of radionuclides in the environment

The transport and retardation process, migration behaviour and chemistry of radionuclides of fission products and actinides in engineered bentonite nuclear waste barriers are reviewed. Storage and performance of engineered barriers and concepts of multiple-barrier repositories are discussed. The eff...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 1998-03, Vol.229 (1/2), p.13-18
Main Author: Jedinakova-Krizova, V
Format: Article
Language:English
Online Access:Get full text
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Summary:The transport and retardation process, migration behaviour and chemistry of radionuclides of fission products and actinides in engineered bentonite nuclear waste barriers are reviewed. Storage and performance of engineered barriers and concepts of multiple-barrier repositories are discussed. The effect of solubilities and dissolution reactions, diffusion and sorption /desorption, complexation and variations in aqueous phased composition, pH value and oxidation-reduction properties on the distribution coefficient between aqueous and solid phases enabled thermodynamic modelling and the evaluation of various phenomena in buffer/backfill-groundwater systems. Validation of radionuclide migration, sorption and speciation in real systems was difficult but modelling of bentonite barriers and groundwater successful.
ISSN:0236-5731
DOI:10.1007/BF02389439