Condition assessments and corrosion measurements of cooling water chambers in a nuclear power plant

E. Sistonen, J. Piironen, F. Al-Neshawy, J. Puttonen, Miguel Ferreira, Erkki Vesikari

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

    Abstract

    This research was done as a part of the project Aging Management of Concrete Structures in Nuclear Power Plants (MANAGE) in The Finnish Research Programme on Nuclear Power Plant Safety 2011-2014, SAFIR 2014. The aim of this research was to carry out condition assessments and corrosion measurements to evaluate the condition of the reinforced concrete structures of the cooling water chambers in a Finnish nuclear power plant and to verify the possible state of corrosion of the reinforcement. The condition assessment was based on concrete samples taken from the structures above the water level, at the range of the water level, and under the water level. The concrete samples were subjected to the following analyses: the carbonation depth, the chloride profile, and the study of the microstructure based on thin sections. Concrete cover measurements and visual inspection of the concrete structures and exposed reinforcements were done to approve the corrosion measurements. These determinations and measured Half-Cell potentials were used with the Pourbaix-diagrams for steel to estimate the state of corrosion of reinforcement. The measured depths of concrete cover correlated the design value 60 mm. The average depth of carbonation of concrete was very small; varying between 0 mm and 12 mm. Estimations for the state of corrosion of reinforcement according to the Pourbaix-diagrams showed the reinforcement to be in passive state. Visual inspections confirmed the estimation; all of the exposed reinforcing bars were intact.
    Original languageEnglish
    Title of host publicationProceedings
    Subtitle of host publication22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22
    EditorsFarhang Ostadan
    Place of PublicationRed Hook, NY, USA
    PublisherCurran Associates Inc.
    ISBN (Print)978-1-6326-6762-5
    Publication statusPublished - 2013
    MoE publication typeNot Eligible
    Event22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22 - San Francisco, United States
    Duration: 18 Aug 201323 Aug 2013
    Conference number: 23

    Conference

    Conference22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22
    Abbreviated titleSMiRT 22
    CountryUnited States
    CitySan Francisco
    Period18/08/1323/08/13

    Keywords

    • concrete
    • durability
    • ageing management
    • long term operation
    • service life
    • LCA
    • corrosion

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  • Cite this

    Sistonen, E., Piironen, J., Al-Neshawy, F., Puttonen, J., Ferreira, M., & Vesikari, E. (2013). Condition assessments and corrosion measurements of cooling water chambers in a nuclear power plant. In F. Ostadan (Ed.), Proceedings: 22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22 [Paper 789] Curran Associates Inc..