Carbon-14 speciation during anoxic corrosion of activated steel in a repository environment

Wieland, Erich; Cvetković, Benjamin Z.; Kunz, Dominik; Salazar Quintero, Gary Abdiel; Szidat, Sönke (6 November 2017). Carbon-14 speciation during anoxic corrosion of activated steel in a repository environment (Unpublished). In: EUROSAFE 2017. Paris, France. 6.-7.11.2017.

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Radioactive waste contains significant amounts of 14C which has been identified a key radionuclide in safety assessments. In Switzerland, the 14C inventory of a cement-based repository for low- and intermediate-level radioactive waste (L/ILW) is mainly associated with activated steel (~85 %). 14C is produced by 14N activation in steel parts exposed to thermal neutron flux in light water reactors. Release of 14C occurs in the near field of a deep geological repository due to anoxic corrosion of activated steel. Although the 14C inventory of the L/ILW repository and the sources of 14C are well known, the formation of 14C species during steel corrosion is only poorly understood. The aim of the present study was to identify and quantify the 14C-bearing carbon species formed during the anoxic corrosion of iron and steel and further to determine the 14C speciation in a corrosion experiment with activated steel. All experiments were conducted in conditions similar to those anticipated in the near field of a cement-based repository.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Salazar Quintero, Gary Abdiel and Szidat, Sönke

Subjects:

500 Science > 540 Chemistry

Language:

English

Submitter:

Sönke Szidat

Date Deposited:

21 Feb 2018 16:14

Last Modified:

03 Nov 2019 04:57

BORIS DOI:

10.7892/boris.108862

URI:

https://boris.unibe.ch/id/eprint/108862

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