On-line monitoring for further corrosion reduction and better understanding of the activity build-up in LWR primary coolant systems

Kari Mäkelä, Pertti Aaltonen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Uniform corrosion rates of materials in contact with the coolant in boiling water reactors (BWRs) and pressurized water reactors (PWRs) are low and this kind of material degradation is very unlikely to compromise the integrity of the primary pressure boundary. In a properly controlled environment the initial corrosion rates decrease reaching the low corrosion rate, typical for the steady state between the outer oxide surface and the environment. The water chemistry practice modifications can be used to decrease fuel corrosion, improve material integrity and slow down activity build-up in the primary circuit. Therefore, on-line water chemistry monitoring at high temperatures should be conducted to obtain local, reliable and thus useful information over long measurement periods at a specific loop site. In this paper, the effect of water chemistry on the corrosion product formation, activation, transport and redeposition on out-of-core surfaces is discussed.

Original languageEnglish
Pages (from-to)163 - 177
Number of pages15
JournalInternational Journal of Pressure Vessels and Piping
Volume55
Issue number1
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

Fingerprint

Corrosion rate
Coolants
Corrosion
Monitoring
Water piping systems
Boiling water reactors
Water
Pressurized water reactors
Oxides
Chemical activation
Degradation
Networks (circuits)
Temperature

Cite this

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title = "On-line monitoring for further corrosion reduction and better understanding of the activity build-up in LWR primary coolant systems",
abstract = "Uniform corrosion rates of materials in contact with the coolant in boiling water reactors (BWRs) and pressurized water reactors (PWRs) are low and this kind of material degradation is very unlikely to compromise the integrity of the primary pressure boundary. In a properly controlled environment the initial corrosion rates decrease reaching the low corrosion rate, typical for the steady state between the outer oxide surface and the environment. The water chemistry practice modifications can be used to decrease fuel corrosion, improve material integrity and slow down activity build-up in the primary circuit. Therefore, on-line water chemistry monitoring at high temperatures should be conducted to obtain local, reliable and thus useful information over long measurement periods at a specific loop site. In this paper, the effect of water chemistry on the corrosion product formation, activation, transport and redeposition on out-of-core surfaces is discussed.",
author = "Kari M{\"a}kel{\"a} and Pertti Aaltonen",
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On-line monitoring for further corrosion reduction and better understanding of the activity build-up in LWR primary coolant systems. / Mäkelä, Kari; Aaltonen, Pertti.

In: International Journal of Pressure Vessels and Piping, Vol. 55, No. 1, 1993, p. 163 - 177.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - On-line monitoring for further corrosion reduction and better understanding of the activity build-up in LWR primary coolant systems

AU - Mäkelä, Kari

AU - Aaltonen, Pertti

N1 - Project code: MET301834

PY - 1993

Y1 - 1993

N2 - Uniform corrosion rates of materials in contact with the coolant in boiling water reactors (BWRs) and pressurized water reactors (PWRs) are low and this kind of material degradation is very unlikely to compromise the integrity of the primary pressure boundary. In a properly controlled environment the initial corrosion rates decrease reaching the low corrosion rate, typical for the steady state between the outer oxide surface and the environment. The water chemistry practice modifications can be used to decrease fuel corrosion, improve material integrity and slow down activity build-up in the primary circuit. Therefore, on-line water chemistry monitoring at high temperatures should be conducted to obtain local, reliable and thus useful information over long measurement periods at a specific loop site. In this paper, the effect of water chemistry on the corrosion product formation, activation, transport and redeposition on out-of-core surfaces is discussed.

AB - Uniform corrosion rates of materials in contact with the coolant in boiling water reactors (BWRs) and pressurized water reactors (PWRs) are low and this kind of material degradation is very unlikely to compromise the integrity of the primary pressure boundary. In a properly controlled environment the initial corrosion rates decrease reaching the low corrosion rate, typical for the steady state between the outer oxide surface and the environment. The water chemistry practice modifications can be used to decrease fuel corrosion, improve material integrity and slow down activity build-up in the primary circuit. Therefore, on-line water chemistry monitoring at high temperatures should be conducted to obtain local, reliable and thus useful information over long measurement periods at a specific loop site. In this paper, the effect of water chemistry on the corrosion product formation, activation, transport and redeposition on out-of-core surfaces is discussed.

U2 - 10.1016/0308-0161(93)90054-W

DO - 10.1016/0308-0161(93)90054-W

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