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

    Fingerprint

    Cooling water
    Nuclear power plants
    Reinforcement
    Concretes
    Corrosion
    Water levels
    Concrete construction
    Carbonation
    Inspection
    Reinforced concrete
    Aging of materials
    Microstructure
    Steel

    Keywords

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

    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] Red Hook, NY, USA: Curran Associates Inc..
    Sistonen, E. ; Piironen, J. ; Al-Neshawy, F. ; Puttonen, J. ; Ferreira, Miguel ; Vesikari, Erkki. / Condition assessments and corrosion measurements of cooling water chambers in a nuclear power plant. Proceedings: 22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22. editor / Farhang Ostadan. Red Hook, NY, USA : Curran Associates Inc., 2013.
    @inproceedings{36073f24ffd54767b739b238c5d0196e,
    title = "Condition assessments and corrosion measurements of cooling water chambers in a nuclear power plant",
    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.",
    keywords = "concrete, durability, ageing management, long term operation, service life, LCA, corrosion",
    author = "E. Sistonen and J. Piironen and F. Al-Neshawy and J. Puttonen and Miguel Ferreira and Erkki Vesikari",
    year = "2013",
    language = "English",
    isbn = "978-1-6326-6762-5",
    editor = "Ostadan, {Farhang }",
    booktitle = "Proceedings",
    publisher = "Curran Associates Inc.",
    address = "United States",

    }

    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., Red Hook, NY, USA, 22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22, San Francisco, United States, 18/08/13.

    Condition assessments and corrosion measurements of cooling water chambers in a nuclear power plant. / Sistonen, E.; Piironen, J.; Al-Neshawy, F.; Puttonen, J.; Ferreira, Miguel; Vesikari, Erkki.

    Proceedings: 22nd International Conference on Structural Mechanics in Reactor Technology 2013, SMiRT 22. ed. / Farhang Ostadan. Red Hook, NY, USA : Curran Associates Inc., 2013. Paper 789.

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

    TY - GEN

    T1 - Condition assessments and corrosion measurements of cooling water chambers in a nuclear power plant

    AU - Sistonen, E.

    AU - Piironen, J.

    AU - Al-Neshawy, F.

    AU - Puttonen, J.

    AU - Ferreira, Miguel

    AU - Vesikari, Erkki

    PY - 2013

    Y1 - 2013

    N2 - 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.

    AB - 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.

    KW - concrete

    KW - durability

    KW - ageing management

    KW - long term operation

    KW - service life

    KW - LCA

    KW - corrosion

    M3 - Conference article in proceedings

    SN - 978-1-6326-6762-5

    BT - Proceedings

    A2 - Ostadan, Farhang

    PB - Curran Associates Inc.

    CY - Red Hook, NY, USA

    ER -

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