Irradiation assisted stress corrosion cracking of core components

Aki Toivonen, Pertti Aaltonen, Pertti Nenonen, Ulla Ehrnsten, Arvo Käki, Matti Valo, Arto Kukkonen, O. Hietanen

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

1 Citation (Scopus)

Abstract

A test program on a reactor core material originating from the bottom end of a VVER absorber element is being carried out in aim to characterize the changes in mechanical properties and the occurrence of irradiation assisted stress corrosion cracking in PWR environments by laboratory tests. The mechanical and microstructural properties of the absorber bottom end material have changed due to neutron exposure. However, the material's response to neutron irradiation differs from the usual response of austenitic stainless steels. Yield strength, tensile strength, and dislocation loop density are all lower than expected. An enhancing effect of Ti-carbide precipitations on the defect density is another new finding of interest. High defect density close to the Ti-carbides is presumed to result from the stress/strain field caused by the precipitations.
Original languageEnglish
Title of host publicationPlant Life Management
Subtitle of host publicationMidterm status of a R&D project
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages241-255
ISBN (Electronic)951-38-5728-X
ISBN (Print)951-38-5727-1
Publication statusPublished - 2001
MoE publication typeA4 Article in a conference publication
EventPlant Life Management: Midterm status of a R&D project - Espoo, Finland
Duration: 1 Jan 20011 Jan 2001

Publication series

SeriesVTT Symposium
Number218
ISSN0357-9387

Conference

ConferencePlant Life Management
CountryFinland
CityEspoo
Period1/01/011/01/01

Fingerprint

Stress corrosion cracking
Defect density
Irradiation
Carbides
Reactor cores
Neutron irradiation
Austenitic stainless steel
Yield stress
Neutrons
Tensile strength
Mechanical properties

Cite this

Toivonen, A., Aaltonen, P., Nenonen, P., Ehrnsten, U., Käki, A., Valo, M., ... Hietanen, O. (2001). Irradiation assisted stress corrosion cracking of core components. In Plant Life Management: Midterm status of a R&D project (pp. 241-255). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 218
Toivonen, Aki ; Aaltonen, Pertti ; Nenonen, Pertti ; Ehrnsten, Ulla ; Käki, Arvo ; Valo, Matti ; Kukkonen, Arto ; Hietanen, O. / Irradiation assisted stress corrosion cracking of core components. Plant Life Management: Midterm status of a R&D project. Espoo : VTT Technical Research Centre of Finland, 2001. pp. 241-255 (VTT Symposium; No. 218).
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abstract = "A test program on a reactor core material originating from the bottom end of a VVER absorber element is being carried out in aim to characterize the changes in mechanical properties and the occurrence of irradiation assisted stress corrosion cracking in PWR environments by laboratory tests. The mechanical and microstructural properties of the absorber bottom end material have changed due to neutron exposure. However, the material's response to neutron irradiation differs from the usual response of austenitic stainless steels. Yield strength, tensile strength, and dislocation loop density are all lower than expected. An enhancing effect of Ti-carbide precipitations on the defect density is another new finding of interest. High defect density close to the Ti-carbides is presumed to result from the stress/strain field caused by the precipitations.",
author = "Aki Toivonen and Pertti Aaltonen and Pertti Nenonen and Ulla Ehrnsten and Arvo K{\"a}ki and Matti Valo and Arto Kukkonen and O. Hietanen",
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Toivonen, A, Aaltonen, P, Nenonen, P, Ehrnsten, U, Käki, A, Valo, M, Kukkonen, A & Hietanen, O 2001, Irradiation assisted stress corrosion cracking of core components. in Plant Life Management: Midterm status of a R&D project. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 218, pp. 241-255, Plant Life Management, Espoo, Finland, 1/01/01.

Irradiation assisted stress corrosion cracking of core components. / Toivonen, Aki; Aaltonen, Pertti; Nenonen, Pertti; Ehrnsten, Ulla; Käki, Arvo; Valo, Matti; Kukkonen, Arto; Hietanen, O.

Plant Life Management: Midterm status of a R&D project. Espoo : VTT Technical Research Centre of Finland, 2001. p. 241-255 (VTT Symposium; No. 218).

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

TY - GEN

T1 - Irradiation assisted stress corrosion cracking of core components

AU - Toivonen, Aki

AU - Aaltonen, Pertti

AU - Nenonen, Pertti

AU - Ehrnsten, Ulla

AU - Käki, Arvo

AU - Valo, Matti

AU - Kukkonen, Arto

AU - Hietanen, O.

PY - 2001

Y1 - 2001

N2 - A test program on a reactor core material originating from the bottom end of a VVER absorber element is being carried out in aim to characterize the changes in mechanical properties and the occurrence of irradiation assisted stress corrosion cracking in PWR environments by laboratory tests. The mechanical and microstructural properties of the absorber bottom end material have changed due to neutron exposure. However, the material's response to neutron irradiation differs from the usual response of austenitic stainless steels. Yield strength, tensile strength, and dislocation loop density are all lower than expected. An enhancing effect of Ti-carbide precipitations on the defect density is another new finding of interest. High defect density close to the Ti-carbides is presumed to result from the stress/strain field caused by the precipitations.

AB - A test program on a reactor core material originating from the bottom end of a VVER absorber element is being carried out in aim to characterize the changes in mechanical properties and the occurrence of irradiation assisted stress corrosion cracking in PWR environments by laboratory tests. The mechanical and microstructural properties of the absorber bottom end material have changed due to neutron exposure. However, the material's response to neutron irradiation differs from the usual response of austenitic stainless steels. Yield strength, tensile strength, and dislocation loop density are all lower than expected. An enhancing effect of Ti-carbide precipitations on the defect density is another new finding of interest. High defect density close to the Ti-carbides is presumed to result from the stress/strain field caused by the precipitations.

M3 - Conference article in proceedings

SN - 951-38-5727-1

T3 - VTT Symposium

SP - 241

EP - 255

BT - Plant Life Management

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Toivonen A, Aaltonen P, Nenonen P, Ehrnsten U, Käki A, Valo M et al. Irradiation assisted stress corrosion cracking of core components. In Plant Life Management: Midterm status of a R&D project. Espoo: VTT Technical Research Centre of Finland. 2001. p. 241-255. (VTT Symposium; No. 218).