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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    author = "Esko Arilahti and Taru Lehtikuusi and Markus Olin and Timo Saario and P{\"a}ivi Varis",
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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

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    DO - 10.1179/1743278210Y.0000000009

    M3 - Article

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    JO - Corrosion Engineering Science and Technology

    JF - Corrosion Engineering Science and Technology

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