Erosion of buffer caused by groundwater leakages based on EMS-application

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    The bentonite barrier is an essential part of a safe spent fuel repository in granitic bedrock. The issue of saturation phase erosion of bentonite, caused by groundwater leakages, was approached theoretically and computationally. We evaluated numerically the total mass of eroded bentonite out of a cylindrical erosion channel corresponding to the case of fixed channel radius and purely suction induced free swelling, i.e. the rate swelling and erosion are equal. We observed that eroded mass loss as a function of time increases in log-log scale linearly in the active part of the erosion process, i.e. after the initial transient regime of high swelling and before the final decay towards stable buffer. The slope of the mass loss vs. time varies, but is always between 0.7 and 1.0.
    Original languageEnglish
    Title of host publicationCOMSOL Conference 2010 Paris
    Subtitle of host publicationUser presentations and proceedings
    PublisherCOMSOL
    Number of pages7
    ISBN (Print)978-0-9825697-7-1
    Publication statusPublished - 2010
    MoE publication typeB3 Non-refereed article in conference proceedings

    Fingerprint

    leakage
    bentonite
    swelling
    erosion
    groundwater
    repository
    suction
    bedrock
    saturation
    loss

    Keywords

    • bentonite
    • model
    • erosion

    Cite this

    Punkkinen, O., Pulkkanen, V-M., & Olin, M. (2010). Erosion of buffer caused by groundwater leakages based on EMS-application. In COMSOL Conference 2010 Paris: User presentations and proceedings COMSOL.
    Punkkinen, Olli ; Pulkkanen, Veli-Matti ; Olin, Markus. / Erosion of buffer caused by groundwater leakages based on EMS-application. COMSOL Conference 2010 Paris: User presentations and proceedings. COMSOL, 2010.
    @inproceedings{18189ddac66c4ee783d2b46b0bb23c64,
    title = "Erosion of buffer caused by groundwater leakages based on EMS-application",
    abstract = "The bentonite barrier is an essential part of a safe spent fuel repository in granitic bedrock. The issue of saturation phase erosion of bentonite, caused by groundwater leakages, was approached theoretically and computationally. We evaluated numerically the total mass of eroded bentonite out of a cylindrical erosion channel corresponding to the case of fixed channel radius and purely suction induced free swelling, i.e. the rate swelling and erosion are equal. We observed that eroded mass loss as a function of time increases in log-log scale linearly in the active part of the erosion process, i.e. after the initial transient regime of high swelling and before the final decay towards stable buffer. The slope of the mass loss vs. time varies, but is always between 0.7 and 1.0.",
    keywords = "bentonite, model, erosion",
    author = "Olli Punkkinen and Veli-Matti Pulkkanen and Markus Olin",
    note = "Project code: 73047 EroosioM",
    year = "2010",
    language = "English",
    isbn = "978-0-9825697-7-1",
    booktitle = "COMSOL Conference 2010 Paris",
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    Punkkinen, O, Pulkkanen, V-M & Olin, M 2010, Erosion of buffer caused by groundwater leakages based on EMS-application. in COMSOL Conference 2010 Paris: User presentations and proceedings. COMSOL.

    Erosion of buffer caused by groundwater leakages based on EMS-application. / Punkkinen, Olli; Pulkkanen, Veli-Matti; Olin, Markus.

    COMSOL Conference 2010 Paris: User presentations and proceedings. COMSOL, 2010.

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

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    T1 - Erosion of buffer caused by groundwater leakages based on EMS-application

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    AU - Olin, Markus

    N1 - Project code: 73047 EroosioM

    PY - 2010

    Y1 - 2010

    N2 - The bentonite barrier is an essential part of a safe spent fuel repository in granitic bedrock. The issue of saturation phase erosion of bentonite, caused by groundwater leakages, was approached theoretically and computationally. We evaluated numerically the total mass of eroded bentonite out of a cylindrical erosion channel corresponding to the case of fixed channel radius and purely suction induced free swelling, i.e. the rate swelling and erosion are equal. We observed that eroded mass loss as a function of time increases in log-log scale linearly in the active part of the erosion process, i.e. after the initial transient regime of high swelling and before the final decay towards stable buffer. The slope of the mass loss vs. time varies, but is always between 0.7 and 1.0.

    AB - The bentonite barrier is an essential part of a safe spent fuel repository in granitic bedrock. The issue of saturation phase erosion of bentonite, caused by groundwater leakages, was approached theoretically and computationally. We evaluated numerically the total mass of eroded bentonite out of a cylindrical erosion channel corresponding to the case of fixed channel radius and purely suction induced free swelling, i.e. the rate swelling and erosion are equal. We observed that eroded mass loss as a function of time increases in log-log scale linearly in the active part of the erosion process, i.e. after the initial transient regime of high swelling and before the final decay towards stable buffer. The slope of the mass loss vs. time varies, but is always between 0.7 and 1.0.

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    KW - model

    KW - erosion

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    SN - 978-0-9825697-7-1

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    Punkkinen O, Pulkkanen V-M, Olin M. Erosion of buffer caused by groundwater leakages based on EMS-application. In COMSOL Conference 2010 Paris: User presentations and proceedings. COMSOL. 2010