Irradiation assisted stress corrosion cracking of core components

Aki Toivonen, Pertti Aaltonen, Pertti Nenonen, Ulla Ehrnsten, Arvo Käki, Matti Valo, Arto Kukkonen, O. Hietanen

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

    1 Citation (Scopus)

    Abstract

    A test program on a reactor core material originating from the bottom end of a VVER absorber element is being carried out in aim to characterize the changes in mechanical properties and the occurrence of irradiation assisted stress corrosion cracking in PWR environments by laboratory tests. The mechanical and microstructural properties of the absorber bottom end material have changed due to neutron exposure. However, the material's response to neutron irradiation differs from the usual response of austenitic stainless steels. Yield strength, tensile strength, and dislocation loop density are all lower than expected. An enhancing effect of Ti-carbide precipitations on the defect density is another new finding of interest. High defect density close to the Ti-carbides is presumed to result from the stress/strain field caused by the precipitations.
    Original languageEnglish
    Title of host publicationPlant Life Management
    Subtitle of host publicationMidterm status of a R&D project
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages241-255
    ISBN (Electronic)951-38-5728-X
    ISBN (Print)951-38-5727-1
    Publication statusPublished - 2001
    MoE publication typeA4 Article in a conference publication
    EventPlant Life Management: Midterm status of a R&D project - Espoo, Finland
    Duration: 1 Jan 20011 Jan 2001

    Publication series

    SeriesVTT Symposium
    Number218
    ISSN0357-9387

    Conference

    ConferencePlant Life Management
    CountryFinland
    CityEspoo
    Period1/01/011/01/01

    Fingerprint

    Stress corrosion cracking
    Defect density
    Irradiation
    Carbides
    Reactor cores
    Neutron irradiation
    Austenitic stainless steel
    Yield stress
    Neutrons
    Tensile strength
    Mechanical properties

    Cite this

    Toivonen, A., Aaltonen, P., Nenonen, P., Ehrnsten, U., Käki, A., Valo, M., ... Hietanen, O. (2001). Irradiation assisted stress corrosion cracking of core components. In Plant Life Management: Midterm status of a R&D project (pp. 241-255). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 218
    Toivonen, Aki ; Aaltonen, Pertti ; Nenonen, Pertti ; Ehrnsten, Ulla ; Käki, Arvo ; Valo, Matti ; Kukkonen, Arto ; Hietanen, O. / Irradiation assisted stress corrosion cracking of core components. Plant Life Management: Midterm status of a R&D project. Espoo : VTT Technical Research Centre of Finland, 2001. pp. 241-255 (VTT Symposium; No. 218).
    @inproceedings{0a6a06f6c7f2461ba5c3977938d63b6a,
    title = "Irradiation assisted stress corrosion cracking of core components",
    abstract = "A test program on a reactor core material originating from the bottom end of a VVER absorber element is being carried out in aim to characterize the changes in mechanical properties and the occurrence of irradiation assisted stress corrosion cracking in PWR environments by laboratory tests. The mechanical and microstructural properties of the absorber bottom end material have changed due to neutron exposure. However, the material's response to neutron irradiation differs from the usual response of austenitic stainless steels. Yield strength, tensile strength, and dislocation loop density are all lower than expected. An enhancing effect of Ti-carbide precipitations on the defect density is another new finding of interest. High defect density close to the Ti-carbides is presumed to result from the stress/strain field caused by the precipitations.",
    author = "Aki Toivonen and Pertti Aaltonen and Pertti Nenonen and Ulla Ehrnsten and Arvo K{\"a}ki and Matti Valo and Arto Kukkonen and O. Hietanen",
    year = "2001",
    language = "English",
    isbn = "951-38-5727-1",
    series = "VTT Symposium",
    publisher = "VTT Technical Research Centre of Finland",
    number = "218",
    pages = "241--255",
    booktitle = "Plant Life Management",
    address = "Finland",

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    Toivonen, A, Aaltonen, P, Nenonen, P, Ehrnsten, U, Käki, A, Valo, M, Kukkonen, A & Hietanen, O 2001, Irradiation assisted stress corrosion cracking of core components. in Plant Life Management: Midterm status of a R&D project. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 218, pp. 241-255, Plant Life Management, Espoo, Finland, 1/01/01.

    Irradiation assisted stress corrosion cracking of core components. / Toivonen, Aki; Aaltonen, Pertti; Nenonen, Pertti; Ehrnsten, Ulla; Käki, Arvo; Valo, Matti; Kukkonen, Arto; Hietanen, O.

    Plant Life Management: Midterm status of a R&D project. Espoo : VTT Technical Research Centre of Finland, 2001. p. 241-255 (VTT Symposium; No. 218).

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

    TY - GEN

    T1 - Irradiation assisted stress corrosion cracking of core components

    AU - Toivonen, Aki

    AU - Aaltonen, Pertti

    AU - Nenonen, Pertti

    AU - Ehrnsten, Ulla

    AU - Käki, Arvo

    AU - Valo, Matti

    AU - Kukkonen, Arto

    AU - Hietanen, O.

    PY - 2001

    Y1 - 2001

    N2 - A test program on a reactor core material originating from the bottom end of a VVER absorber element is being carried out in aim to characterize the changes in mechanical properties and the occurrence of irradiation assisted stress corrosion cracking in PWR environments by laboratory tests. The mechanical and microstructural properties of the absorber bottom end material have changed due to neutron exposure. However, the material's response to neutron irradiation differs from the usual response of austenitic stainless steels. Yield strength, tensile strength, and dislocation loop density are all lower than expected. An enhancing effect of Ti-carbide precipitations on the defect density is another new finding of interest. High defect density close to the Ti-carbides is presumed to result from the stress/strain field caused by the precipitations.

    AB - A test program on a reactor core material originating from the bottom end of a VVER absorber element is being carried out in aim to characterize the changes in mechanical properties and the occurrence of irradiation assisted stress corrosion cracking in PWR environments by laboratory tests. The mechanical and microstructural properties of the absorber bottom end material have changed due to neutron exposure. However, the material's response to neutron irradiation differs from the usual response of austenitic stainless steels. Yield strength, tensile strength, and dislocation loop density are all lower than expected. An enhancing effect of Ti-carbide precipitations on the defect density is another new finding of interest. High defect density close to the Ti-carbides is presumed to result from the stress/strain field caused by the precipitations.

    M3 - Conference article in proceedings

    SN - 951-38-5727-1

    T3 - VTT Symposium

    SP - 241

    EP - 255

    BT - Plant Life Management

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Toivonen A, Aaltonen P, Nenonen P, Ehrnsten U, Käki A, Valo M et al. Irradiation assisted stress corrosion cracking of core components. In Plant Life Management: Midterm status of a R&D project. Espoo: VTT Technical Research Centre of Finland. 2001. p. 241-255. (VTT Symposium; No. 218).