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Nuclear Glass Alteration in Clay: Assessment of the Effect of Direct Contact between the Materials through Experimental and Modeling Approach

Published online by Cambridge University Press:  01 February 2011

S. Gin ,
F. Thierry  and
Y. Minet
S. Gin
Affiliation:
Commissariat à l'Énergie Atomique - CEA Valrhô DIEC/SESC, BP 17171, 30207 Bagnols-sur-Cèze Cedex, France
F. Thierry
Affiliation:
Commissariat à l'Énergie Atomique - CEA Valrhô DIEC/SESC, BP 17171, 30207 Bagnols-sur-Cèze Cedex, France
Y. Minet
Affiliation:
Commissariat à l'Énergie Atomique - CEA Valrhô DIEC/SESC, BP 17171, 30207 Bagnols-sur-Cèze Cedex, France
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Abstract

A new approach is proposed for discussing the reliability and predictability of the models intended to evaluate the performance of glass packages under geological disposal conditions. The r(t) model developed by the CEA is used in this study to simulate original laboratory test results, and the validity of the predictions is then verified experimentally. This approach allows us to check that the key mechanisms are correctly simulated, even if they are simplified. A review of the experimental results (glass alteration kinetics and morphology of the alteration film) suggests that physically separating the glass and clay under geological disposal conditions could considerably diminish the silica pump effect attributed to reactive clays such as Boom clay or FoCa7 clay.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 133
Copyright
Copyright © Materials Research Society 2004

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References

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