Multicomponent gas flow through compacted clay buffer in a higher activity radioactive waste geological disposal facility

Masum, Shakil ORCID: https://orcid.org/0000-0001-8525-7507, Vardon, P. J., Thomas, Hywel Rhys ORCID: https://orcid.org/0000-0002-3951-0409, Chen, Q. and Nicholson, Donovan 2012. Multicomponent gas flow through compacted clay buffer in a higher activity radioactive waste geological disposal facility. Mineralogical Magazine 76 (8) , pp. 3337-3344. 10.1180/minmag.2012.076.8.46

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Abstract

At the post-closure stage of a geological disposal facility for higher activity radioactive waste several species of gas are likely to be generated in the near-field environment. These could alter the sealing and chemical properties of the bentonite buffer and the local geochemical environment significantly. The authors’ attempt to simulate multicomponent gas flow through variably saturated porous media is presented. Governing equations have been developed for a reactive gas-flow model to simulate the thermo-hydro-gas-chemical-mechanical behaviour, with specific reference to the performance of highly compacted bentonite buffer subjected to repository gas generation and migration. The developed equations have been included in the bespoke numerical model COMPASS and some generic simulations are also presented. The model presented extends current capability to assess buffer performance.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TD Environmental technology. Sanitary engineering
Publisher:	Mineralogical Society
ISSN:	0026-461X
Last Modified:	31 Oct 2022 10:01
URI:	https://orca.cardiff.ac.uk/id/eprint/83285

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