AGE special report: Activity build-up and corrosion

Martin Bojinov, Timo Laitinen, Jarmo Lehikoinen, Kari Mäkelä, Markus Olin, Timo Saario, Pekka Sten

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

Abstract

Due to the exposure to the aqueous coolant, the components of the primary circuit in a nuclear power plant oxidise, resulting both in the formation of an oxide film on the component surfaces and in the release of soluble metal ions. The properties of the oxide films are likely to have a significant effect on the corrosion susceptibility as well as on the rate at which radioactive nuclei are incorporated on the component surfaces from the coolant. The latter phenomenon has a marked effect on the occupational dose rates, especially during annual outages. This work aims at understanding the properties and behaviour of oxide films in different coolant conditions and thus at predicting the risks for corrosion and activity build-up. The approach chosen is to investigate and model separately the phenomena taking place at the film/solution interface, in the outer, porous part of the oxide film and in the inner, compact part of the film. In addition, a significant contribution is paid to the development of electrochemical techniques capable of operating in high-temperature environments with even extremely low conductivity. This report summarises the progress made during the first two years of the project.
Original languageEnglish
Title of host publicationFINNUS: The Finnish Research Programme on Nuclear Power Plant Safety
Subtitle of host publicationInterim Report 1999 - August 2000
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages100-113
ISBN (Electronic)951-38-5751-4
ISBN (Print)951-38-5750-7
Publication statusPublished - 2000
MoE publication typeD2 Article in professional manuals or guides or professional information systems or text book material
EventInterim Mid Term Seminar. Espoo, FI, 31 Oct. - 1 Nov. 2000 -
Duration: 1 Jan 2000 → …

Publication series

SeriesVTT Tiedotteita - Research Notes
Number2057
ISSN1235-0605

Conference

ConferenceInterim Mid Term Seminar. Espoo, FI, 31 Oct. - 1 Nov. 2000
Period1/01/00 → …

Fingerprint

Oxide films
Coolants
Corrosion
Outages
Nuclear power plants
Metal ions
Networks (circuits)
Temperature

Cite this

Bojinov, M., Laitinen, T., Lehikoinen, J., Mäkelä, K., Olin, M., Saario, T., & Sten, P. (2000). AGE special report: Activity build-up and corrosion. In FINNUS: The Finnish Research Programme on Nuclear Power Plant Safety: Interim Report 1999 - August 2000 (pp. 100-113). Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Research Notes, No. 2057
Bojinov, Martin ; Laitinen, Timo ; Lehikoinen, Jarmo ; Mäkelä, Kari ; Olin, Markus ; Saario, Timo ; Sten, Pekka. / AGE special report : Activity build-up and corrosion. FINNUS: The Finnish Research Programme on Nuclear Power Plant Safety: Interim Report 1999 - August 2000. Espoo : VTT Technical Research Centre of Finland, 2000. pp. 100-113 (VTT Tiedotteita - Research Notes; No. 2057).
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abstract = "Due to the exposure to the aqueous coolant, the components of the primary circuit in a nuclear power plant oxidise, resulting both in the formation of an oxide film on the component surfaces and in the release of soluble metal ions. The properties of the oxide films are likely to have a significant effect on the corrosion susceptibility as well as on the rate at which radioactive nuclei are incorporated on the component surfaces from the coolant. The latter phenomenon has a marked effect on the occupational dose rates, especially during annual outages. This work aims at understanding the properties and behaviour of oxide films in different coolant conditions and thus at predicting the risks for corrosion and activity build-up. The approach chosen is to investigate and model separately the phenomena taking place at the film/solution interface, in the outer, porous part of the oxide film and in the inner, compact part of the film. In addition, a significant contribution is paid to the development of electrochemical techniques capable of operating in high-temperature environments with even extremely low conductivity. This report summarises the progress made during the first two years of the project.",
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Bojinov, M, Laitinen, T, Lehikoinen, J, Mäkelä, K, Olin, M, Saario, T & Sten, P 2000, AGE special report: Activity build-up and corrosion. in FINNUS: The Finnish Research Programme on Nuclear Power Plant Safety: Interim Report 1999 - August 2000. VTT Technical Research Centre of Finland, Espoo, VTT Tiedotteita - Research Notes, no. 2057, pp. 100-113, Interim Mid Term Seminar. Espoo, FI, 31 Oct. - 1 Nov. 2000, 1/01/00.

AGE special report : Activity build-up and corrosion. / Bojinov, Martin; Laitinen, Timo; Lehikoinen, Jarmo; Mäkelä, Kari; Olin, Markus; Saario, Timo; Sten, Pekka.

FINNUS: The Finnish Research Programme on Nuclear Power Plant Safety: Interim Report 1999 - August 2000. Espoo : VTT Technical Research Centre of Finland, 2000. p. 100-113 (VTT Tiedotteita - Research Notes; No. 2057).

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

TY - CHAP

T1 - AGE special report

T2 - Activity build-up and corrosion

AU - Bojinov, Martin

AU - Laitinen, Timo

AU - Lehikoinen, Jarmo

AU - Mäkelä, Kari

AU - Olin, Markus

AU - Saario, Timo

AU - Sten, Pekka

PY - 2000

Y1 - 2000

N2 - Due to the exposure to the aqueous coolant, the components of the primary circuit in a nuclear power plant oxidise, resulting both in the formation of an oxide film on the component surfaces and in the release of soluble metal ions. The properties of the oxide films are likely to have a significant effect on the corrosion susceptibility as well as on the rate at which radioactive nuclei are incorporated on the component surfaces from the coolant. The latter phenomenon has a marked effect on the occupational dose rates, especially during annual outages. This work aims at understanding the properties and behaviour of oxide films in different coolant conditions and thus at predicting the risks for corrosion and activity build-up. The approach chosen is to investigate and model separately the phenomena taking place at the film/solution interface, in the outer, porous part of the oxide film and in the inner, compact part of the film. In addition, a significant contribution is paid to the development of electrochemical techniques capable of operating in high-temperature environments with even extremely low conductivity. This report summarises the progress made during the first two years of the project.

AB - Due to the exposure to the aqueous coolant, the components of the primary circuit in a nuclear power plant oxidise, resulting both in the formation of an oxide film on the component surfaces and in the release of soluble metal ions. The properties of the oxide films are likely to have a significant effect on the corrosion susceptibility as well as on the rate at which radioactive nuclei are incorporated on the component surfaces from the coolant. The latter phenomenon has a marked effect on the occupational dose rates, especially during annual outages. This work aims at understanding the properties and behaviour of oxide films in different coolant conditions and thus at predicting the risks for corrosion and activity build-up. The approach chosen is to investigate and model separately the phenomena taking place at the film/solution interface, in the outer, porous part of the oxide film and in the inner, compact part of the film. In addition, a significant contribution is paid to the development of electrochemical techniques capable of operating in high-temperature environments with even extremely low conductivity. This report summarises the progress made during the first two years of the project.

M3 - Chapter or book article

SN - 951-38-5750-7

T3 - VTT Tiedotteita - Research Notes

SP - 100

EP - 113

BT - FINNUS: The Finnish Research Programme on Nuclear Power Plant Safety

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Bojinov M, Laitinen T, Lehikoinen J, Mäkelä K, Olin M, Saario T et al. AGE special report: Activity build-up and corrosion. In FINNUS: The Finnish Research Programme on Nuclear Power Plant Safety: Interim Report 1999 - August 2000. Espoo: VTT Technical Research Centre of Finland. 2000. p. 100-113. (VTT Tiedotteita - Research Notes; No. 2057).