Crack initiation and arrest in a pressurized thermal shock test for a model pressure vessel made of VVER-440 reactor pressure vessel steel

Heikki Keinänen, Heli Talja, Rauno Rintamaa, Kari Törrönen, Ralf Ahlstrand, Pekka Nurkkala, Georgy Karzov, Boris Timofeev, Alexander Blumin

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

A joint pressure vessel integrity research programme involving three partners is being carried out during 1990–1995. The partners are the Central Research Institute of Structural Materials “Prometey” from Russia, IVO International Ltd (IVO) from Finland, and the Technical Research Centre of Finland (VTT). The main objective of the research programme is to increase the reliability of the VVER-440 reactor pressure vessel safety analysis. This is achieved by providing material property data for the VVER-440 pressure vessel steel, and by producing experimental understanding of the crack behaviour in pressurized thermal shock loading for the validation of different fracture assessment methods.
The programme is divided into four parts: pressure vessel tests, material characterization, computational fracture analyses, and evaluation of the analysis methods. The testing programme comprises tests on two model pressure vessels with artificial axial outer surface flaws. The first model vessel had circumferential weld seam at the mid-length of the vessel. A special embrittling heat treatment is applied to the vessels before tests to simulate the fracture toughness at the end-of-life condition of a real reactor pressure vessel.
The sixth test on the first model led to crack initiation followed by arrest. After the testing phase, material characterization was performed.
Comparison of calculated and experimental data generally led to a good correlation, although the work is being continued to resolve the discrepancies between the measured initiation and arrest properties of the material.

Original languageEnglish
Pages (from-to)217-226
JournalNuclear Engineering and Design
Volume158
Issue number2-3
DOIs
Publication statusPublished - 1995
MoE publication typeA1 Journal article-refereed

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crack arrest
shock tests
pressure vessels
thermal shock
crack initiation
Thermal shock
Steel structures
Pressure vessels
Crack initiation
crack
vessel
steel
reactors
steels
vessels
Finland
Testing
materials tests
research program
Fracture toughness

Cite this

Keinänen, Heikki ; Talja, Heli ; Rintamaa, Rauno ; Törrönen, Kari ; Ahlstrand, Ralf ; Nurkkala, Pekka ; Karzov, Georgy ; Timofeev, Boris ; Blumin, Alexander. / Crack initiation and arrest in a pressurized thermal shock test for a model pressure vessel made of VVER-440 reactor pressure vessel steel. In: Nuclear Engineering and Design. 1995 ; Vol. 158, No. 2-3. pp. 217-226.
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abstract = "A joint pressure vessel integrity research programme involving three partners is being carried out during 1990–1995. The partners are the Central Research Institute of Structural Materials “Prometey” from Russia, IVO International Ltd (IVO) from Finland, and the Technical Research Centre of Finland (VTT). The main objective of the research programme is to increase the reliability of the VVER-440 reactor pressure vessel safety analysis. This is achieved by providing material property data for the VVER-440 pressure vessel steel, and by producing experimental understanding of the crack behaviour in pressurized thermal shock loading for the validation of different fracture assessment methods. The programme is divided into four parts: pressure vessel tests, material characterization, computational fracture analyses, and evaluation of the analysis methods. The testing programme comprises tests on two model pressure vessels with artificial axial outer surface flaws. The first model vessel had circumferential weld seam at the mid-length of the vessel. A special embrittling heat treatment is applied to the vessels before tests to simulate the fracture toughness at the end-of-life condition of a real reactor pressure vessel. The sixth test on the first model led to crack initiation followed by arrest. After the testing phase, material characterization was performed. Comparison of calculated and experimental data generally led to a good correlation, although the work is being continued to resolve the discrepancies between the measured initiation and arrest properties of the material.",
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Crack initiation and arrest in a pressurized thermal shock test for a model pressure vessel made of VVER-440 reactor pressure vessel steel. / Keinänen, Heikki; Talja, Heli; Rintamaa, Rauno; Törrönen, Kari; Ahlstrand, Ralf; Nurkkala, Pekka; Karzov, Georgy; Timofeev, Boris; Blumin, Alexander.

In: Nuclear Engineering and Design, Vol. 158, No. 2-3, 1995, p. 217-226.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Crack initiation and arrest in a pressurized thermal shock test for a model pressure vessel made of VVER-440 reactor pressure vessel steel

AU - Keinänen, Heikki

AU - Talja, Heli

AU - Rintamaa, Rauno

AU - Törrönen, Kari

AU - Ahlstrand, Ralf

AU - Nurkkala, Pekka

AU - Karzov, Georgy

AU - Timofeev, Boris

AU - Blumin, Alexander

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PY - 1995

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AB - A joint pressure vessel integrity research programme involving three partners is being carried out during 1990–1995. The partners are the Central Research Institute of Structural Materials “Prometey” from Russia, IVO International Ltd (IVO) from Finland, and the Technical Research Centre of Finland (VTT). The main objective of the research programme is to increase the reliability of the VVER-440 reactor pressure vessel safety analysis. This is achieved by providing material property data for the VVER-440 pressure vessel steel, and by producing experimental understanding of the crack behaviour in pressurized thermal shock loading for the validation of different fracture assessment methods. The programme is divided into four parts: pressure vessel tests, material characterization, computational fracture analyses, and evaluation of the analysis methods. The testing programme comprises tests on two model pressure vessels with artificial axial outer surface flaws. The first model vessel had circumferential weld seam at the mid-length of the vessel. A special embrittling heat treatment is applied to the vessels before tests to simulate the fracture toughness at the end-of-life condition of a real reactor pressure vessel. The sixth test on the first model led to crack initiation followed by arrest. After the testing phase, material characterization was performed. Comparison of calculated and experimental data generally led to a good correlation, although the work is being continued to resolve the discrepancies between the measured initiation and arrest properties of the material.

U2 - 10.1016/0029-5493(95)01030-L

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