Microbially induced corrosion in fire fighting systems - experience and remedies

Ulla Ehrnstén; Leena Carpén; Kimmo Tompuri

doi:10.1007/978-3-319-68454-3_62

Microbially induced corrosion in fire fighting systems - experience and remedies

Ulla Ehrnstén, Leena Carpén, Kimmo Tompuri

Teollisuuden Voima Oyj

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

1 Citation (Scopus)

Abstract

Firefighting water systems are important safety systems in all industries, including nuclear power plants (NPPs). However, they are susceptible to microbially induced corrosion, which is a degradation mode needing special attention. Leakages were observed in a fire fighting system made from stainless steel at a nuclear power plant shortly after maintenance and modernization work, which included replacement of part of the old carbon steel pipelines with stainless steel pipelines, as well as exchange of some Type 304 stainless steel pipes with Type 316 pipes due to relining parts of the system. The failure analysis revealed sub-surface corrosion cavities with pinholes at the inner surface and finally penetrating the whole pipe wall thickness. It was concluded that the reason for the leaks was due to microbially induced corrosion, (MIC). The paper will present the results from failure analyses, explain the remedial actions taken at the power plant, and discuss the implication of these findings on new similar systems, including the importance of avoiding iron deposits and optimization of water quality.

Original language	English
Title of host publication	Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors
Editors	Michael Wright, Denise Paraventi, John H. Jackson
Publisher	Springer
Pages	831-840
Number of pages	10
ISBN (Print)	978-3-319-68453-6, 978-3-319-68454-3
DOIs	https://doi.org/10.1007/978-3-319-68454-3_62
Publication status	Published - 2018
MoE publication type	A4 Article in a conference publication
Event	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017 - Portland, United States Duration: 13 Aug 2017 → 17 Aug 2017

Publication series

Series	Minerals, Metals and Materials Series
Volume	Part F11
ISSN	2367-1181

Conference

Conference	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017
Abbreviated title	EDM 2017
Country/Territory	United States
City	Portland
Period	13/08/17 → 17/08/17

Keywords

nuclear
MIC
stainless steel
aging management

Access to Document

10.1007/978-3-319-68454-3_62

Cite this

Ehrnstén, U., Carpén, L., & Tompuri, K. (2018). Microbially induced corrosion in fire fighting systems - experience and remedies. In M. Wright, D. Paraventi, & J. H. Jackson (Eds.), Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors (pp. 831-840). Springer. https://doi.org/10.1007/978-3-319-68454-3_62

Ehrnstén, Ulla ; Carpén, Leena ; Tompuri, Kimmo. / Microbially induced corrosion in fire fighting systems - experience and remedies. Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors . editor / Michael Wright ; Denise Paraventi ; John H. Jackson. Springer, 2018. pp. 831-840 (Minerals, Metals and Materials Series, Vol. Part F11).

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title = "Microbially induced corrosion in fire fighting systems - experience and remedies",

abstract = "Firefighting water systems are important safety systems in all industries, including nuclear power plants (NPPs). However, they are susceptible to microbially induced corrosion, which is a degradation mode needing special attention. Leakages were observed in a fire fighting system made from stainless steel at a nuclear power plant shortly after maintenance and modernization work, which included replacement of part of the old carbon steel pipelines with stainless steel pipelines, as well as exchange of some Type 304 stainless steel pipes with Type 316 pipes due to relining parts of the system. The failure analysis revealed sub-surface corrosion cavities with pinholes at the inner surface and finally penetrating the whole pipe wall thickness. It was concluded that the reason for the leaks was due to microbially induced corrosion, (MIC). The paper will present the results from failure analyses, explain the remedial actions taken at the power plant, and discuss the implication of these findings on new similar systems, including the importance of avoiding iron deposits and optimization of water quality.",

keywords = "nuclear, MIC, stainless steel, aging management",

author = "Ulla Ehrnst{\'e}n and Leena Carp{\'e}n and Kimmo Tompuri",

note = "SDA: SHP: SASUNE Nuclear Project code: 113466 ; 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017, EDM 2017 ; Conference date: 13-08-2017 Through 17-08-2017",

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Ehrnstén, U, Carpén, L & Tompuri, K 2018, Microbially induced corrosion in fire fighting systems - experience and remedies. in M Wright, D Paraventi & JH Jackson (eds), Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors . Springer, Minerals, Metals and Materials Series, vol. Part F11, pp. 831-840, 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017, Portland, United States, 13/08/17. https://doi.org/10.1007/978-3-319-68454-3_62

Microbially induced corrosion in fire fighting systems - experience and remedies. / Ehrnstén, Ulla; Carpén, Leena; Tompuri, Kimmo.
Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors . ed. / Michael Wright; Denise Paraventi; John H. Jackson. Springer, 2018. p. 831-840 (Minerals, Metals and Materials Series, Vol. Part F11).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Microbially induced corrosion in fire fighting systems - experience and remedies

AU - Ehrnstén, Ulla

AU - Carpén, Leena

AU - Tompuri, Kimmo

N1 - SDA: SHP: SASUNE Nuclear Project code: 113466

PY - 2018

Y1 - 2018

N2 - Firefighting water systems are important safety systems in all industries, including nuclear power plants (NPPs). However, they are susceptible to microbially induced corrosion, which is a degradation mode needing special attention. Leakages were observed in a fire fighting system made from stainless steel at a nuclear power plant shortly after maintenance and modernization work, which included replacement of part of the old carbon steel pipelines with stainless steel pipelines, as well as exchange of some Type 304 stainless steel pipes with Type 316 pipes due to relining parts of the system. The failure analysis revealed sub-surface corrosion cavities with pinholes at the inner surface and finally penetrating the whole pipe wall thickness. It was concluded that the reason for the leaks was due to microbially induced corrosion, (MIC). The paper will present the results from failure analyses, explain the remedial actions taken at the power plant, and discuss the implication of these findings on new similar systems, including the importance of avoiding iron deposits and optimization of water quality.

AB - Firefighting water systems are important safety systems in all industries, including nuclear power plants (NPPs). However, they are susceptible to microbially induced corrosion, which is a degradation mode needing special attention. Leakages were observed in a fire fighting system made from stainless steel at a nuclear power plant shortly after maintenance and modernization work, which included replacement of part of the old carbon steel pipelines with stainless steel pipelines, as well as exchange of some Type 304 stainless steel pipes with Type 316 pipes due to relining parts of the system. The failure analysis revealed sub-surface corrosion cavities with pinholes at the inner surface and finally penetrating the whole pipe wall thickness. It was concluded that the reason for the leaks was due to microbially induced corrosion, (MIC). The paper will present the results from failure analyses, explain the remedial actions taken at the power plant, and discuss the implication of these findings on new similar systems, including the importance of avoiding iron deposits and optimization of water quality.

KW - nuclear

KW - MIC

KW - stainless steel

KW - aging management

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T3 - Minerals, Metals and Materials Series

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BT - Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors

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A2 - Paraventi, Denise

A2 - Jackson, John H.

PB - Springer

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Y2 - 13 August 2017 through 17 August 2017

ER -

Ehrnstén U, Carpén L, Tompuri K. Microbially induced corrosion in fire fighting systems - experience and remedies. In Wright M, Paraventi D, Jackson JH, editors, Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors . Springer. 2018. p. 831-840. (Minerals, Metals and Materials Series, Vol. Part F11). doi: 10.1007/978-3-319-68454-3_62

Microbially induced corrosion in fire fighting systems - experience and remedies

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