Evidence for internal diffusion of sulphide from groundwater into grain boundaries ahead of crack tip in Cu OFP copper

Esko Arilahti, Taru Lehtikuusi, Markus Olin, Timo Saario (Corresponding Author), Päivi Varis

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Copper canister is a central technical barrier for radioactive release from high level nuclear waste in the so called KBS-3 concept planned to be used in Finland and Sweden for disposal of spent nuclear fuel. Canisters will be placed in the granitic bedrock at about 400–500 m depth and surrounded by a layer of bentonite clay planned to protect the canister from any chemical and mechanical damage, and especially acting as a diffusion barrier. While researching for the possibility of stress corrosion cracking in phosphorus microalloyed copper in presence of sulphides in the groundwater, indications were found for a new potential degradation mechanism involving internal diffusion of sulphide. This paper describes the evidence for the new mechanism and discusses the scenarios involving diffusion of sulphide onto the copper canister surface.
Original languageEnglish
Pages (from-to)134-137
Number of pages3
JournalCorrosion Engineering Science and Technology
Volume46
Issue number3
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Sulfides
Crack tips
Copper
Groundwater
Grain boundaries
Radioactive Waste
Bentonite
Diffusion barriers
Spent fuels
Nuclear fuels
Stress corrosion cracking
Radioactive wastes
Phosphorus
Clay
Degradation

Keywords

  • copper
  • corrosion
  • spent fuel disposal
  • sulphide

Cite this

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abstract = "Copper canister is a central technical barrier for radioactive release from high level nuclear waste in the so called KBS-3 concept planned to be used in Finland and Sweden for disposal of spent nuclear fuel. Canisters will be placed in the granitic bedrock at about 400–500 m depth and surrounded by a layer of bentonite clay planned to protect the canister from any chemical and mechanical damage, and especially acting as a diffusion barrier. While researching for the possibility of stress corrosion cracking in phosphorus microalloyed copper in presence of sulphides in the groundwater, indications were found for a new potential degradation mechanism involving internal diffusion of sulphide. This paper describes the evidence for the new mechanism and discusses the scenarios involving diffusion of sulphide onto the copper canister surface.",
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T1 - Evidence for internal diffusion of sulphide from groundwater into grain boundaries ahead of crack tip in Cu OFP copper

AU - Arilahti, Esko

AU - Lehtikuusi, Taru

AU - Olin, Markus

AU - Saario, Timo

AU - Varis, Päivi

PY - 2013

Y1 - 2013

N2 - Copper canister is a central technical barrier for radioactive release from high level nuclear waste in the so called KBS-3 concept planned to be used in Finland and Sweden for disposal of spent nuclear fuel. Canisters will be placed in the granitic bedrock at about 400–500 m depth and surrounded by a layer of bentonite clay planned to protect the canister from any chemical and mechanical damage, and especially acting as a diffusion barrier. While researching for the possibility of stress corrosion cracking in phosphorus microalloyed copper in presence of sulphides in the groundwater, indications were found for a new potential degradation mechanism involving internal diffusion of sulphide. This paper describes the evidence for the new mechanism and discusses the scenarios involving diffusion of sulphide onto the copper canister surface.

AB - Copper canister is a central technical barrier for radioactive release from high level nuclear waste in the so called KBS-3 concept planned to be used in Finland and Sweden for disposal of spent nuclear fuel. Canisters will be placed in the granitic bedrock at about 400–500 m depth and surrounded by a layer of bentonite clay planned to protect the canister from any chemical and mechanical damage, and especially acting as a diffusion barrier. While researching for the possibility of stress corrosion cracking in phosphorus microalloyed copper in presence of sulphides in the groundwater, indications were found for a new potential degradation mechanism involving internal diffusion of sulphide. This paper describes the evidence for the new mechanism and discusses the scenarios involving diffusion of sulphide onto the copper canister surface.

KW - copper

KW - corrosion

KW - spent fuel disposal

KW - sulphide

U2 - 10.1179/1743278210Y.0000000009

DO - 10.1179/1743278210Y.0000000009

M3 - Article

VL - 46

SP - 134

EP - 137

JO - Corrosion Engineering Science and Technology

JF - Corrosion Engineering Science and Technology

SN - 1478-422X

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ER -