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A synthesis of approaches for modelling coupled thermal-hydraulic-mechanical-chemical processes in a single novaculite fracture experiment
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2017 (English)In: Environmental Earth Sciences, ISSN 1866-6280, E-ISSN 1866-6299, Vol. 76, no 1, 12Article in journal (Refereed) Published
Abstract [en]

The geological formation immediately surrounding a nuclear waste disposal facility has the potential to undergo a complex set of physical and chemical processes starting from construction and continuing many years after closure. The DECOVALEX project (DEvelopment of COupled models and their VALidation against EXperiments) was established and maintained by a variety of waste management organisations, regulators and research organisations to help improve capabilities in experimental interpretation, numerical modelling and blind prediction of complex coupled systems. In the present round of DECOVALEX (D-2015), one component of Task C1 has considered the detailed experimental work of Yasuhara et al. (Earth Planet Sci Lett 244: 186-200, 2006), wherein a single artificial fracture in novaculite (micro-or crypto-crystalline quartz) is subject to variable fluid flows, mechanical confining pressure and different applied temperatures. This paper presents a synthesis of the completed work of six separate research teams. A range of approaches are presented including 2D and 3D high-resolution coupled thermo-hydro-mechanical-chemical models. The results of the work show that while good, physically plausible representations of the experiment can be obtained using a range of approaches, there is considerable uncertainty in the relative importance of the various processes, and that the parameterisation of these processes can be closely linked to the interpretation of the fracture surface topography at different spatial scales.

Place, publisher, year, edition, pages
Springer, 2017. Vol. 76, no 1, 12
Keyword [en]
Fracture, Experiment, Modelling, THMC, Radioactive waste
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-202441DOI: 10.1007/s12665-016-6326-6ISI: 000392286300012Scopus ID: 2-s2.0-85006741754OAI: oai:DiVA.org:kth-202441DiVA: diva2:1078713
Note

QC 20170306

Available from: 2017-03-06 Created: 2017-03-06 Last updated: 2017-11-29Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • modern-language-association-8th-edition
  • vancouver
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More styles
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  • de-DE
  • en-GB
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  • fi-FI
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  • nn-NB
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  • Other locale
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Output format
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  • asciidoc
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