AGE special report: Activity build-up and corrosion

Martin Bojinov, Timo Laitinen, Jarmo Lehikoinen, Kari Mäkelä, Markus Olin, Timo Saario, Pekka Sten

    Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

    Abstract

    Due to the exposure to the aqueous coolant, the components of the primary circuit in a nuclear power plant oxidise, resulting both in the formation of an oxide film on the component surfaces and in the release of soluble metal ions. The properties of the oxide films are likely to have a significant effect on the corrosion susceptibility as well as on the rate at which radioactive nuclei are incorporated on the component surfaces from the coolant. The latter phenomenon has a marked effect on the occupational dose rates, especially during annual outages. This work aims at understanding the properties and behaviour of oxide films in different coolant conditions and thus at predicting the risks for corrosion and activity build-up. The approach chosen is to investigate and model separately the phenomena taking place at the film/solution interface, in the outer, porous part of the oxide film and in the inner, compact part of the film. In addition, a significant contribution is paid to the development of electrochemical techniques capable of operating in high-temperature environments with even extremely low conductivity. This report summarises the progress made during the first two years of the project.
    Original languageEnglish
    Title of host publicationFINNUS: The Finnish Research Programme on Nuclear Power Plant Safety
    Subtitle of host publicationInterim Report 1999 - August 2000
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages100-113
    ISBN (Electronic)951-38-5751-4
    ISBN (Print)951-38-5750-7
    Publication statusPublished - 2000
    MoE publication typeD2 Article in professional manuals or guides or professional information systems or text book material
    EventInterim Mid Term Seminar. Espoo, FI, 31 Oct. - 1 Nov. 2000 -
    Duration: 1 Jan 2000 → …

    Publication series

    SeriesVTT Tiedotteita - Research Notes
    Number2057
    ISSN1235-0605

    Conference

    ConferenceInterim Mid Term Seminar. Espoo, FI, 31 Oct. - 1 Nov. 2000
    Period1/01/00 → …

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  • Cite this

    Bojinov, M., Laitinen, T., Lehikoinen, J., Mäkelä, K., Olin, M., Saario, T., & Sten, P. (2000). AGE special report: Activity build-up and corrosion. In FINNUS: The Finnish Research Programme on Nuclear Power Plant Safety: Interim Report 1999 - August 2000 (pp. 100-113). VTT Technical Research Centre of Finland. VTT Tiedotteita - Research Notes, No. 2057 http://www.vtt.fi/inf/pdf/tiedotteet/2000/T2057.pdf