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Nuclear Glass Corrosion Mechanisms Applied to the French LWR Reference Glass

Published online by Cambridge University Press:  26 February 2011

J. L. Nogues ,
E. Y. Vernaz  and
N. Jacquet-Francillon
J. L. Nogues
Affiliation:
CEA/CEN Valrho, SDHA, BP 171, 30205 Bagnols-sur-Cèze, FRANCE
E. Y. Vernaz
Affiliation:
CEA/CEN Valrho, SDHA, BP 171, 30205 Bagnols-sur-Cèze, FRANCE
N. Jacquet-Francillon
Affiliation:
CEA/CEN Valrho, SDHA, BP 171, 30205 Bagnols-sur-Cèze, FRANCE
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Abstract

The French LWR reference glass was leached under different experimental conditions. Analysis of the leachate together with electron microscopic examination of the leached surfaces led us to the following conclusions. The corrosion of the nuclear glasses is congruent at the hydration front, but only a fraction of the elements enters the solution ; the other elements contribute to the formation of the surface layer resulting in incongruent dissolution from the standpoint of the entire sample. The leaching rate in static experiments was observed to decrease sharply in time. Specific experiments were performed to assess the protective role of the hydrolyzed layer with respect to the silica solubility limit, and the predominant effect of the solubility limit was clearly demonstrated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 44: Symposium N – Scientific Basis for Nuclear Waste Management VIII , 1984 , 89
Copyright
Copyright © Materials Research Society 1985

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References

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