Monitoring of BWR water chemistry and oxide films on samples at Olkiluoto 1 during the fuel cycle 2000-2001

Martin Bojinov, Petri Kinnunen, Timo Laitinen, Kari Mäkelä, Timo Saario, Pekka Sirkiä

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

    1 Citation (Scopus)

    Abstract

    A flow-through cell unit has been installed in the shutdown cooling system 321 at Olkiluoto 1 in May 2000 in order to collect the data needed for establishing the correlations between rate of activity incorporation, water chemistry data and the properties of oxide films formed on material samples.Observations and correlations related to susceptibility to stress corrosion cracking and other forms of corrosion are also looked for. The monitoring unit provides relevant high-temperature water chemistry information that can be well used both for assessing long-term trends and for sensitive detection of rapid changes in the coolant environment. Also the material sample cell has been verified to give a representative view of activity incorporation and oxidation of construction materials in the primary coolant. The results have indicated marked differences between the behaviour of different isotopes and different materials. It has become evident that he thickness of the oxide film is not the only factor that correlates with the extent of activity build-up.
    Original languageEnglish
    Title of host publicationPlant Life Management
    Subtitle of host publicationProgress for structural integrity
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages121-136
    ISBN (Electronic)951-38-6281-X
    ISBN (Print)951-38-6280-1
    Publication statusPublished - 2003
    MoE publication typeB3 Non-refereed article in conference proceedings
    EventPlant Life Management: Progress for structural integrity - Espoo, Finland
    Duration: 1 Jan 20021 Jan 2002

    Publication series

    SeriesVTT Symposium
    Number227
    ISSN0357-9387

    Seminar

    SeminarPlant Life Management
    CountryFinland
    CityEspoo
    Period1/01/021/01/02

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    Bojinov, M., Kinnunen, P., Laitinen, T., Mäkelä, K., Saario, T., & Sirkiä, P. (2003). Monitoring of BWR water chemistry and oxide films on samples at Olkiluoto 1 during the fuel cycle 2000-2001. In Plant Life Management: Progress for structural integrity (pp. 121-136). VTT Technical Research Centre of Finland. VTT Symposium, No. 227 http://www.vtt.fi/inf/pdf/symposiums/2003/S227.pdf