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Expérimentation et Modélisation du Transfert d'hydrogène à travers des argiles de centre de stockage de déchets radioactifs

Abstract : Gases will be generated by corrosion of high radioactive waste containers in deep geological repositories. A gas phase will be generated. Gas pressure will build up and penetrated the geological formation. If gases do not penetrate the geological barrier efficiently, the pressure build up may create a risk of fracturation and of creation of preferential pathways for radionuclide migration. The present work focuses on Callovo-Oxfordian argillites characterisation. An experiment, designed to measure very low permeabilities, was used with hydrogen/helium and analysed using the Dusty Gas Model. Argillites close to saturation have an accessible porosity to gas transfer that is lower than 0,1% to 1% of the porosity. Analysis of the Knudsen effect suggests that this accessible network should be made of 50 nm to 200 nm diameter pores. The permeabilities values were integrated to an ANDRA operating model. The model showed that the maximum pressure expected near the repository would be 83 bar.
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https://tel.archives-ouvertes.fr/tel-00331826
Contributor : Pierre Boulin <>
Submitted on : Friday, October 17, 2008 - 5:41:44 PM
Last modification on : Thursday, November 19, 2020 - 3:54:29 PM
Long-term archiving on: : Monday, June 7, 2010 - 6:33:53 PM

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Pierre Boulin. Expérimentation et Modélisation du Transfert d'hydrogène à travers des argiles de centre de stockage de déchets radioactifs. Hydrologie. Institut National Polytechnique de Grenoble - INPG, 2008. Français. ⟨tel-00331826⟩

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