[Estimation de la durée de vie du verre R7T7 dans différents milieux]
Les verres de confinement des produits de fission sont les premières matrices pour lesquelles des études approfondies de comportement à long terme ont été entreprises. Un très grand nombre de résultats a été obtenu au cours des vingt dernières années, des collaborations internationales se sont développées et une méthodologie rigoureuse à été définie en vue de prédire le comportement du verre sur des périodes de plusieurs dizaines de milliers d'années. L'excellente résistance à l'auto-irradiation du verre dit « R7T7 » a été démontrée. La modélisation de l'altération par l'eau dans des conditions de stockage géologique optimisées mais réalistes, permet d'estimer la durée de vie d'un colis de verre à plusieurs millions d'années.
Fission product containment glasses were the first matrices for which long-term behavior studies were undertaken. A substantial body of results has been obtained over the last twenty years, international scientific cooperation programs have been developed, and a strict methodology has progressively been defined to predict the behavior of these materials on a time scale of several tens of thousands of years. The excellent self-irradiation resistance of the French ‘R7T7’ glass has been demonstrated. Models of aqueous alteration under optimized but realistic geological disposal conditions suggest a glass package lifetime of several million years.
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Mots-clés : verres de confinement, irradiation, lixiviation, comportement à long terme, durée de vie, stockage
Étienne Y. Vernaz 1
@article{CRPHYS_2002__3_7-8_813_0,
author = {\'Etienne Y. Vernaz},
title = {Estimating the lifetime of {R7T7} glass in various media},
journal = {Comptes Rendus. Physique},
pages = {813--825},
publisher = {Elsevier},
volume = {3},
number = {7-8},
year = {2002},
doi = {10.1016/S1631-0705(02)01368-3},
language = {en},
}
Étienne Y. Vernaz. Estimating the lifetime of R7T7 glass in various media. Comptes Rendus. Physique, Volume 3 (2002) no. 7-8, pp. 813-825. doi : 10.1016/S1631-0705(02)01368-3. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/S1631-0705(02)01368-3/
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