Community Research and Development Information Service - CORDIS


Long-term behaviour of glass: Improving the glass source term and substantiating the basic hypotheses (GLASTAB), Final Report

Project ID: FIKW-CT-2000-00007
Funded under: FP5-EAECTP C


The disposal of vitrified waste forms in a geological repository requires predictions of their very long-term behaviour in complex media, where water will be both the main alteration factor and the main radiotoxicity vector from the repository site to the biosphere. Prediction on time scales beyond the realm of human experimentation makes it indispensable to understand all the phenomena involved in the interaction between the glass and the environment. The GLASTAB project was undertaken to improve our knowledge of nuclear glass behaviour, and thus to increase the dependability of glass source term models under representative repository conditions. Adopting an integrated approach to the interactions and coupled phenomena controlling the long-term glass stability in the near field of disposal sites enhances the realism of the models. The overly conservative approach of previous models based on the maximum glass rate alteration is thus no longer necessary.

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