THM and reactive transport analysis of expansive clay barrier in radioactive waste isolation | Zendy

Guimarães L. do N. | Zendy; Gens A. | Zendy; Sánchez M. | Zendy; Olivella S. | Zendy

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THM and reactive transport analysis of expansive clay barrier in radioactive waste isolation

Author(s) -

Guimarães L. do N.,

Gens A.,

Sánchez M.,

Olivella S.

Publication year - 2006

Publication title -

communications in numerical methods in engineering

Language(s) - English

Resource type - Journals

eISSN - 1099-0887

pISSN - 1069-8299

DOI - 10.1002/cnm.852

Subject(s) - radioactive waste , expansive , dissolution , precipitation , containment (computer programming) , code (set theory) , materials science , chemistry , waste management , nuclear engineering , environmental science , chemical engineering , computer science , engineering , composite material , physics , compressive strength , meteorology , set (abstract data type) , programming language

A fully coupled formulation combining reactive transport and an existing thermo‐hydro‐mechanical (THM) code is briefly described. Special attention has been given to phenomena likely to be encountered in clay barriers used as part of containment systems of nuclear waste. The types of processes considered in the chemical formulation include hydrolysis, complex formation, oxidation/reduction reactions, acid/base reactions, precipitation/dissolution of minerals and cation exchange. Both kinetically controlled and equilibrium‐controlled reactions have been incorporated. The formulation has been implemented in the finite element code CODE_BRIGHT. An application is presented concerning the performance of a large scale in situ heating test simulating high‐level nuclear waste repository conditions. Copyright © 2006 John Wiley & Sons, Ltd.

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