Abstract
The disposal of long-lived radioactive wastes by deep burial in suitable rock formations is an emotive issue. Although disposal is technically not exceptionally demanding, the demonstration of long-term safety using predictive hydrogeological and geochemical models has proved much more difficult. In order to validate the results of such predictions, the models and associated computer codes and databases are being tested and calibrated on natural radioactive systems. This article looks at how information on natural radiation sources, and the distribution and behaviour of radionuclides in geochemical systems, is being used to evaluate the performance of deep radioactive waste repositories.
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