Activity incorporation into stainless steel samples in primary coolant at Loviisa 1 during the fuel cycle 2000-2001

Martin Bojinov, Petri Kinnunen, Arto Kukkonen, Timo Laitinen, Marketta Mattila, Kari Mäkelä, Timo Saario, Pekka Sirkiä

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

    1 Citation (Scopus)

    Abstract

    Increased activity incorporation in primary circuit oxides increases the risks of radiation exposure to the maintenance personnel. In order to find out the factors contributing to activity incorporation and to be able to control them, stainless steel samples with different pre-treatments are exposed to the primary coolant at the cold-leg temperature at Loviisa unit 1 since February 2000. Since then, samples have been regularly removed and replaced with new samples. The activity of the removed samples has been determined, and the oxide films on the samples have been analysed in order to find correlations between the properties of the oxide films and activity incorporation. SEM, SIMS and GDOES techniques have been used for the analysis. An additional task of the project is to find the most suitable surface analysis method for oxide films formed in VVER coolant conditions. In this report the analysis results are given together with the HTWC monitoring data obtained at the plant during the fuel cycle 2000-2001.
    Original languageEnglish
    Title of host publicationPlant Life Management
    Subtitle of host publicationProgress for structural integrity
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages137-151
    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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  • Cite this

    Bojinov, M., Kinnunen, P., Kukkonen, A., Laitinen, T., Mattila, M., Mäkelä, K., Saario, T., & Sirkiä, P. (2003). Activity incorporation into stainless steel samples in primary coolant at Loviisa 1 during the fuel cycle 2000-2001. In Plant Life Management: Progress for structural integrity (pp. 137-151). VTT Technical Research Centre of Finland. VTT Symposium, No. 227 http://www.vtt.fi/inf/pdf/symposiums/2003/S227.pdf