Modelling Sulfide Fluxes and Cu Canister Corrosion Rates in the Engineered Barrier System of a Spent Fuel Repository

Wersin, Paul; Alt-Epping, Peter; Pekala, Marek; Pitkänen, Petteri; Snellman, Margit (2017). Modelling Sulfide Fluxes and Cu Canister Corrosion Rates in the Engineered Barrier System of a Spent Fuel Repository. Procedia earth and planetary science, 17, pp. 722-725. Elsevier 10.1016/j.proeps.2016.12.183

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Sulfide is a corrodant for the copper canister in the planned spent fuel repository in Finland and Sweden. Sulfide fluxes and canister corrosion rates in the clay barrier have been assessed by a reactive transport model using the geochemical simulator PFLOTRAN. These rates are linked to the dissolution of gypsum, present in the clay backfill, and the fluxes of sulfate, organic carbon and Fe(II) into interface zones where microbial activity occurs. The permeability of the rock adjacent to the clay backfill exerts a strong control on the biogeochemical processes and the resulting copper corrosion rates.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences
08 Faculty of Science > Institute of Geological Sciences > Rock-Water Interaction

UniBE Contributor:

Wersin, Paul; Alt-Epping, Peter and Pekala, Marek

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

1878-5220

Publisher:

Elsevier

Language:

English

Submitter:

Paul Wersin

Date Deposited:

03 Aug 2017 10:22

Last Modified:

03 Aug 2017 10:22

Publisher DOI:

10.1016/j.proeps.2016.12.183

Uncontrolled Keywords:

sulfate reduction, sulfide, Cu canister corrosion, reactive transport modelling, clay barrier, nuclear waste repository

BORIS DOI:

10.7892/boris.100134

URI:

https://boris.unibe.ch/id/eprint/100134

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