Irradiation response of the IAEA CRP-3 material FFA measured by fracture toughness specimens

Matti Valo, Kim Wallin, Kari Törrönen, Ralf Ahlstrand

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

    4 Citations (Scopus)

    Abstract

    The irradiation response of the French forging material FFA offered by International Atomic Energy Agency (IAEA) has been measured. Charpy-5 and precracked specimens of three-point bending (3-PB) geometry for J-Δa curve measurement have been irradiated in the surveillance position of the Loviisa nuclear power plant (NPP) in a flux of 2 x 1011 n/cm²s to a fluence of approximately 2.0 x 1019 n/cm², E > 1 MeV, at a temperature of 265°C. The irradiation-induced transition temperature shifts measured with Charpy-5 and fracture toughness specimens are correlated by using indexed temperature values. The shape 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 publicationRadiation Embrittlement of Nuclear Reactor Pressure Vessel Steels
    Subtitle of host publicationAn International Review
    EditorsLendell E. Steele
    Place of PublicationPhiladelphia
    PublisherAmerican Society for Testing and Materials ASTM
    Pages238-248
    Volume4
    ISBN (Print)978-0-8031-1478-4
    Publication statusPublished - 1993
    MoE publication typeA4 Article in a conference publication
    EventIAEA Specialists' Meeting on Radiation Embrittlement of Nuclear Reactor Pressure Vessel Steels - Balatonfüred, Hungary
    Duration: 26 Sep 199028 Sep 1990

    Publication series

    SeriesASTM Special Technical Publication
    Volume1170
    ISSN0066-0558

    Conference

    ConferenceIAEA Specialists' Meeting on Radiation Embrittlement of Nuclear Reactor Pressure Vessel Steels
    CountryHungary
    CityBalatonfüred
    Period26/09/9028/09/90

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  • Cite this

    Valo, M., Wallin, K., Törrönen, K., & Ahlstrand, R. (1993). Irradiation response of the IAEA CRP-3 material FFA measured by fracture toughness specimens. In L. E. Steele (Ed.), Radiation Embrittlement of Nuclear Reactor Pressure Vessel Steels: An International Review (Vol. 4, pp. 238-248). American Society for Testing and Materials ASTM. ASTM Special Technical Publication, Vol.. 1170