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 (2018). Carbon-14 speciation during anoxic corrosion of activated steel in a repository environment. ATW : international journal for nuclear power, 63(1), pp. 34-37. Inforum

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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:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Salazar Quintero, Gary Abdiel and Szidat, Sönke

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

1431-5254

Publisher:

Inforum

Language:

English

Submitter:

Sönke Szidat

Date Deposited:

21 Feb 2018 16:10

Last Modified:

22 Oct 2019 19:13

BORIS DOI:

10.7892/boris.109951

URI:

https://boris.unibe.ch/id/eprint/109951

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