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.
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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.",
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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