Theory based statistical interpretation of brittle fracture toughness of reactor pressure vessel steel 15XMφA and its welds

Kim Wallin; Kari Törrönen; Ralf Ahlstrand; Boris Timofeev; Vaklav Rybin; Vladimir Nikolaev; Aleksandr Morozov

doi:10.1016/0029-5493(92)90225-K

Theory based statistical interpretation of brittle fracture toughness of reactor pressure vessel steel 15XMφA and its welds

Kim Wallin (Corresponding Author), Kari Törrönen, Ralf Ahlstrand, Boris Timofeev, Vaklav Rybin, Vladimir Nikolaev, Aleksandr Morozov

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

The reliability of safety analysis of nuclear reactor pressure vessels is imperatively dependent upon the reliability of the fracture toughness values used in the analysis. Normally, existing fracture toughness results are analyzed with standard statistical means making use of empirically defined distribution functions for the fracture toughness. Recent developments in the theoretical modelling of cleavage fracture initiation have evolved a sounder statistical description of the macroscopic fracture toughness. It has thus become possible to make a theoretical interpretation of the scatter in brittle fracture toughness results. Here, the theoretical relations are applied to the statistical analysis of brittle fracture toughness results for the reactor pressure vessel steel 15X2M-phi-A and its welds. Based on the analysis, theoretical statistical reference curves for the steels are presented and compared to the presently used standard reference curves.

Original language	English
Pages (from-to)	239-246
Number of pages	8
Journal	Nuclear Engineering and Design
Volume	135
Issue number	2
DOIs	https://doi.org/10.1016/0029-5493(92)90225-K
Publication status	Published - 1992
MoE publication type	A1 Journal article-refereed

Keywords

welding

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10.1016/0029-5493(92)90225-K

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title = "Theory based statistical interpretation of brittle fracture toughness of reactor pressure vessel steel 15XMφA and its welds",

abstract = "The reliability of safety analysis of nuclear reactor pressure vessels is imperatively dependent upon the reliability of the fracture toughness values used in the analysis. Normally, existing fracture toughness results are analyzed with standard statistical means making use of empirically defined distribution functions for the fracture toughness. Recent developments in the theoretical modelling of cleavage fracture initiation have evolved a sounder statistical description of the macroscopic fracture toughness. It has thus become possible to make a theoretical interpretation of the scatter in brittle fracture toughness results. Here, the theoretical relations are applied to the statistical analysis of brittle fracture toughness results for the reactor pressure vessel steel 15X2M-phi-A and its welds. Based on the analysis, theoretical statistical reference curves for the steels are presented and compared to the presently used standard reference curves.",

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author = "Kim Wallin and Kari T{\"o}rr{\"o}nen and Ralf Ahlstrand and Boris Timofeev and Vaklav Rybin and Vladimir Nikolaev and Aleksandr Morozov",

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doi = "10.1016/0029-5493(92)90225-K",

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T1 - Theory based statistical interpretation of brittle fracture toughness of reactor pressure vessel steel 15XMφA and its welds

AU - Wallin, Kim

AU - Törrönen, Kari

AU - Ahlstrand, Ralf

AU - Timofeev, Boris

AU - Rybin, Vaklav

AU - Nikolaev, Vladimir

AU - Morozov, Aleksandr

N1 - Project code: MET00132

PY - 1992

Y1 - 1992

N2 - The reliability of safety analysis of nuclear reactor pressure vessels is imperatively dependent upon the reliability of the fracture toughness values used in the analysis. Normally, existing fracture toughness results are analyzed with standard statistical means making use of empirically defined distribution functions for the fracture toughness. Recent developments in the theoretical modelling of cleavage fracture initiation have evolved a sounder statistical description of the macroscopic fracture toughness. It has thus become possible to make a theoretical interpretation of the scatter in brittle fracture toughness results. Here, the theoretical relations are applied to the statistical analysis of brittle fracture toughness results for the reactor pressure vessel steel 15X2M-phi-A and its welds. Based on the analysis, theoretical statistical reference curves for the steels are presented and compared to the presently used standard reference curves.

AB - The reliability of safety analysis of nuclear reactor pressure vessels is imperatively dependent upon the reliability of the fracture toughness values used in the analysis. Normally, existing fracture toughness results are analyzed with standard statistical means making use of empirically defined distribution functions for the fracture toughness. Recent developments in the theoretical modelling of cleavage fracture initiation have evolved a sounder statistical description of the macroscopic fracture toughness. It has thus become possible to make a theoretical interpretation of the scatter in brittle fracture toughness results. Here, the theoretical relations are applied to the statistical analysis of brittle fracture toughness results for the reactor pressure vessel steel 15X2M-phi-A and its welds. Based on the analysis, theoretical statistical reference curves for the steels are presented and compared to the presently used standard reference curves.

KW - welding

U2 - 10.1016/0029-5493(92)90225-K

DO - 10.1016/0029-5493(92)90225-K

M3 - Article

SN - 0029-5493

VL - 135

SP - 239

EP - 246

JO - Nuclear Engineering and Design

JF - Nuclear Engineering and Design

IS - 2

ER -

Theory based statistical interpretation of brittle fracture toughness of reactor pressure vessel steel 15XMφA and its welds

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