Effect of sulphide exposure on mechanical properties of CuOFP

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    1 Citation (Scopus)

    Abstract

    In Finland and Sweden nuclear waste disposal is planned to be executed according to the KBS-3-concept. In the concept copper canisters containing the used nuclear fuel are buried in 400-500 m deep in the bedrock. Eventually the surface of the copper canister will come in contact with bentonite pore water which contains corrosive species such as sulphide. In this paper the effect of exposure to sulphide containing bentonite pore water at room temperature on the mechanical properties of oxygen free phosphorous doped copper (CuOFP) was studied with standard ex situ tensile and creep tests. Stress corrosion cracking (SCC) susceptibility of CuOFP was studied with in situ slow strain rate testing (SSRT). Tensile tests performed at room temperature showed a slight trend of degradation in mechanical properties with increasing sulphide concentration. Creep tests were accelerated by performing them at an elevated temperature of T 5-15°C, but still within the power law creep regime. In creep tests the same kind of trend as in the tensile tests could be observed but when the results were compared to the publicly available CuOFP creep data the variations between the exposed and reference samples lay within the data scatter.
    Original languageEnglish
    Pages (from-to)410-414
    JournalCorrosion Engineering Science and Technology
    Volume49
    Issue number6
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Sulfides
    Creep
    Mechanical properties
    Bentonite
    Copper
    Radioactive Waste
    Caustics
    Water
    Nuclear fuels
    Stress corrosion cracking
    Radioactive wastes
    Waste disposal
    Temperature
    Strain rate
    Oxygen
    Degradation
    Testing

    Keywords

    • nuclear waste canisters
    • repositories
    • sulphide
    • oxygen free phosphorus doped copper
    • mechanical properties

    Cite this

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    title = "Effect of sulphide exposure on mechanical properties of CuOFP",
    abstract = "In Finland and Sweden nuclear waste disposal is planned to be executed according to the KBS-3-concept. In the concept copper canisters containing the used nuclear fuel are buried in 400-500 m deep in the bedrock. Eventually the surface of the copper canister will come in contact with bentonite pore water which contains corrosive species such as sulphide. In this paper the effect of exposure to sulphide containing bentonite pore water at room temperature on the mechanical properties of oxygen free phosphorous doped copper (CuOFP) was studied with standard ex situ tensile and creep tests. Stress corrosion cracking (SCC) susceptibility of CuOFP was studied with in situ slow strain rate testing (SSRT). Tensile tests performed at room temperature showed a slight trend of degradation in mechanical properties with increasing sulphide concentration. Creep tests were accelerated by performing them at an elevated temperature of T 5-15°C, but still within the power law creep regime. In creep tests the same kind of trend as in the tensile tests could be observed but when the results were compared to the publicly available CuOFP creep data the variations between the exposed and reference samples lay within the data scatter.",
    keywords = "nuclear waste canisters, repositories, sulphide, oxygen free phosphorus doped copper, mechanical properties",
    author = "Konsta Sipil{\"a} and Esko Arilahti and Taru Lehtikuusi and Timo Saario",
    year = "2014",
    doi = "10.1179/1743278214Y.0000000180",
    language = "English",
    volume = "49",
    pages = "410--414",
    journal = "Corrosion Engineering Science and Technology",
    issn = "1478-422X",
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    TY - JOUR

    T1 - Effect of sulphide exposure on mechanical properties of CuOFP

    AU - Sipilä, Konsta

    AU - Arilahti, Esko

    AU - Lehtikuusi, Taru

    AU - Saario, Timo

    PY - 2014

    Y1 - 2014

    N2 - In Finland and Sweden nuclear waste disposal is planned to be executed according to the KBS-3-concept. In the concept copper canisters containing the used nuclear fuel are buried in 400-500 m deep in the bedrock. Eventually the surface of the copper canister will come in contact with bentonite pore water which contains corrosive species such as sulphide. In this paper the effect of exposure to sulphide containing bentonite pore water at room temperature on the mechanical properties of oxygen free phosphorous doped copper (CuOFP) was studied with standard ex situ tensile and creep tests. Stress corrosion cracking (SCC) susceptibility of CuOFP was studied with in situ slow strain rate testing (SSRT). Tensile tests performed at room temperature showed a slight trend of degradation in mechanical properties with increasing sulphide concentration. Creep tests were accelerated by performing them at an elevated temperature of T 5-15°C, but still within the power law creep regime. In creep tests the same kind of trend as in the tensile tests could be observed but when the results were compared to the publicly available CuOFP creep data the variations between the exposed and reference samples lay within the data scatter.

    AB - In Finland and Sweden nuclear waste disposal is planned to be executed according to the KBS-3-concept. In the concept copper canisters containing the used nuclear fuel are buried in 400-500 m deep in the bedrock. Eventually the surface of the copper canister will come in contact with bentonite pore water which contains corrosive species such as sulphide. In this paper the effect of exposure to sulphide containing bentonite pore water at room temperature on the mechanical properties of oxygen free phosphorous doped copper (CuOFP) was studied with standard ex situ tensile and creep tests. Stress corrosion cracking (SCC) susceptibility of CuOFP was studied with in situ slow strain rate testing (SSRT). Tensile tests performed at room temperature showed a slight trend of degradation in mechanical properties with increasing sulphide concentration. Creep tests were accelerated by performing them at an elevated temperature of T 5-15°C, but still within the power law creep regime. In creep tests the same kind of trend as in the tensile tests could be observed but when the results were compared to the publicly available CuOFP creep data the variations between the exposed and reference samples lay within the data scatter.

    KW - nuclear waste canisters

    KW - repositories

    KW - sulphide

    KW - oxygen free phosphorus doped copper

    KW - mechanical properties

    U2 - 10.1179/1743278214Y.0000000180

    DO - 10.1179/1743278214Y.0000000180

    M3 - Article

    VL - 49

    SP - 410

    EP - 414

    JO - Corrosion Engineering Science and Technology

    JF - Corrosion Engineering Science and Technology

    SN - 1478-422X

    IS - 6

    ER -