A pneumatic bellows-driven setup for controlled-distance electrochemical impedance measurements of Zircaloy-2 in simulated BWR conditions

Esko Arilahti, Martin Bojinov, Lena Hansson-Lyyra, Petri Kinnunen, Pekka Moilanen, Kari Mäkelä, Timo Saario, Pekka Sirkiä

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

    Abstract

    This paper describes a novel pneumatic bellows-driven arrangement designed for controlled-distance electrochemistry (CDE) measurements. The feasibility of the new arrangement has been verified by performing contact electric impedance measurements to study corrosion of Zircaloy-2 in a re-circulation loop simulating the BWR conditions. Until now, the measurements have been carried out using a step-motor driven controlled-distance electrochemistry (CDE) arrangement. The electrical and electrochemical properties of the pre-transition oxide on Zircaloy-2 determined from these measurements were in good agreement with those estimated from measurements with a step-motor driven CDE. Furthermore, the results indicate that the bellows-driven CDE device is less sensitive to the contact pressure variation than the step-motor driven arrangement. This property combined with the bellows-driven displacement mechanism provides a clear advantage for future in-core corrosion studies of fuel cladding materials.
    Original languageEnglish
    Title of host publicationProceedings of the fuel and materials sessions
    Subtitle of host publicationTechnical Report HPR-362-V1
    Pages38-48
    Volume1
    Publication statusPublished - 2004
    MoE publication typeA4 Article in a conference publication
    EventEnlarged Halden Programme Group Meeting - Sandefjord, Norway
    Duration: 9 May 197014 May 2004

    Other

    OtherEnlarged Halden Programme Group Meeting
    CountryNorway
    CitySandefjord
    Period9/05/7014/05/04

    Keywords

    • zirconium alloys
    • corrosion
    • pneumatic bellows
    • electrochemical impedance
    • kinetic model
    • nuclear power plants

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  • Cite this

    Arilahti, E., Bojinov, M., Hansson-Lyyra, L., Kinnunen, P., Moilanen, P., Mäkelä, K., Saario, T., & Sirkiä, P. (2004). A pneumatic bellows-driven setup for controlled-distance electrochemical impedance measurements of Zircaloy-2 in simulated BWR conditions. In Proceedings of the fuel and materials sessions: Technical Report HPR-362-V1 (Vol. 1, pp. 38-48)