γ-radiation induced corrosion of copper in bentonite-water systems under anaerobic conditions

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Norrfors, K. KarinKTH,Tillämpad fysikalisk kemi (författare)

γ-radiation induced corrosion of copper in bentonite-water systems under anaerobic conditions

Artikel/kapitelEngelska2018

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Elsevier Ltd,2018
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LIBRIS-ID:oai:DiVA.org:kth-223137
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223137URI
https://doi.org/10.1016/j.radphyschem.2017.11.004DOI

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Språk:engelska
Sammanfattning på:engelska

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Export Date: 13 February 2018; Article; CODEN: RPCHD; Correspondence Address: Jonsson, M.; School of Chemical Science and Engineering, Applied Physical Chemistry, KTH Royal Institute of TechnologySweden; email: matsj@kth.se; Funding details: SKB, Svensk Kärnbränslehantering. QC 20180326
In this work we have experimentally studied the impact of bentonite clay on the process of radiation-induced copper corrosion in anoxic water. The motivation for this is to further develop our understanding of radiation-driven processes occurring in deep geological repositories for spent nuclear fuel where copper canisters containing the spent nuclear fuel will be embedded in compacted bentonite. Experiments on radiation-induced corrosion in the presence and absence of bentonite were performed along with experiments elucidating the impact irradiation on the Cu2+ adsorption capacity of bentonite. The experiments presented in this work show that the presence of bentonite clay has no or very little effect on the magnitude of radiation-induced corrosion of copper in anoxic aqueous systems. The absence of a protective effect similar to that observed for radiation-induced dissolution of UO2 is attributed to differences in the corrosion mechanism. This provides further support for the previously proposed mechanism where the hydroxyl radical is the key radiolytic oxidant responsible for the corrosion of copper. The radiation effect on the bentonite sorption capacity of Cu2+ (reduced capacity) is in line with what has previously been reported for other cations. The reduced cation sorption capacity is partly attributed to a loss of Al-OH sites upon irradiation.

Ämnesord och genrebeteckningar

NATURVETENSKAP Kemi hsv//swe
NATURAL SCIENCES Chemical Sciences hsv//eng
Aluminum compounds
Anoxic sediments
Copper
Copper corrosion
Corrosion
Irradiation
Positive ions
Radiation
Adsorption capacities
Anaerobic conditions
Compacted bentonite
Corrosion mechanisms
Deep geological repository
Protective effects
Sorption capacities
Spent nuclear fuels
Bentonite
hydroxyl radical
nuclear fuel
adsorption kinetics
anaerobic capacity
Article
embedding
environmental impact assessment
gamma radiation
water supply

Biuppslag (personer, institutioner, konferenser, titlar ...)

Björkbacka, ÅsaKTH,Tillämpad fysikalisk kemi(Swepub:kth)u1igr31w (författare)
Kessler, AmandaKTH,Tillämpad fysikalisk kemi(Swepub:kth)u19qddr7 (författare)
Wold, SusannaKTH,Tillämpad fysikalisk kemi(Swepub:kth)u11y1fb9 (författare)
Jonsson, Mats,1967-KTH,Tillämpad fysikalisk kemi(Swepub:kth)u11mc94v (författare)
KTHTillämpad fysikalisk kemi (creator_code:org_t)

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Ingår i:Radiation Physics and Chemistry: Elsevier Ltd144, s. 8-120969-806X1879-0895

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Av författaren/redakt...: Norrfors, K. Kar ...; Björkbacka, Åsa; Kessler, Amanda; Wold, Susanna; Jonsson, Mats, 1 ...

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Av lärosätet: Kungliga Tekniska Högskolan

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