Irradiation response of the new IAEA correlation monitor material JRQ measured by fracture mechanical properties

Matti Valo, Kim Wallin, Kari Törrönen, Ralf Ahlstrand

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    9 Citations (Scopus)

    Abstract

    The irradiation response of the extensively evaluated Japanese pressure vessel plate material, JRQ, offered by IAEA as a correlation monitor material for international use, has been measured. Charpy V-notch and precracked specimens of 3-point-bend (3-PB) geometry for J-Δa curve measurement have been irradiated in the surveillance position of the Loviisa NPP at a flux of 2×1011 neutrons/(cm2 ∙ s) into a fluence of 2.1×1019 neutrons/cm2, E > 1 MeV, at a temperature of 265°C.

    The irradiation-induced transition temperature shifts measured with Charpy V-notch and fracture mechanics specimens are correlated by using indexed temperature values.

    The shapes of the brittle fracture transition curves, measured with 3-PB specimen geometry for irradiated and reference material states, are compared using a statistical brittle fracture model. Both the shape of the average curve and the scatter of the measured points are considered.

    The effect of irradiation on the ductile fracture behavior based on the measured fracture resistance curves (J-Δa) is presented. The 3-PB specimen geometry is used also for measuring the fracture resistance curves.
    Original languageEnglish
    Title of host publicationEffects of radiation on materials
    Subtitle of host publication15th international symposium
    EditorsR. Stoller, A. Kumar, D. Gelles
    Place of PublicationPhiladelphia
    PublisherAmerican Society for Testing and Materials (ASTM)
    Pages203-215
    ISBN (Print)978-0-80311477-7
    DOIs
    Publication statusPublished - 1992
    MoE publication typeA4 Article in a conference publication
    Event15th International Symposium on the Effects of Radiation on Materials - Nashville, United States
    Duration: 17 Jun 199221 Jun 1992

    Publication series

    SeriesASTM Special Technical Publication
    Volume1125
    ISSN0066-0558

    Conference

    Conference15th International Symposium on the Effects of Radiation on Materials
    CountryUnited States
    CityNashville
    Period17/06/9221/06/92

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