Environment Assisted Fatigue – Rules, Assumptions and Challenges for Fatigue Management of Primary Piping

Jussi Solin; Tommi Seppänen; Petri Lemettinen; Rami Vanninen; Erkki Pulkkinen

doi:10.1115/PVP2022-84627

Environment Assisted Fatigue – Rules, Assumptions and Challenges for Fatigue Management of Primary Piping

Jussi Solin^*, Tommi Seppänen, Petri Lemettinen, Rami Vanninen, Erkki Pulkkinen

^*Corresponding author for this work

BA4510 Fatigue and fracture mechanics

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

This paper introduces and discusses the commonly used methods for calculating environmental penalty factors (Fen) to be used in fatigue assessment of stainless reactor components. Three alternative methods for determining Fen factors are introduced and instructed in the JSME S NF1-2009 Code in a language providing a designer the guidance needed for reliable and repeatable EAF assessment. Following these instructions together with the equations and parameters given in the NUREG/CR-6909 it is possible to obtain same Fen factors as by careful reading of the NUREG/CR-6909 alone. The NUREG/CR-6909, Rev. 1 contains notable amounts of valuable information, but instructions for application can be ambiguous or conflicting. An example related to the modified strain rate approach for determining Fen factors is provided.

Original language	English
Title of host publication	ASME 2022 Pressure Vessels & Piping Conference
Publisher	American Society of Mechanical Engineers (ASME)
Number of pages	9
Volume	1
ISBN (Electronic)	978-0-7918-8614-4
DOIs	https://doi.org/10.1115/PVP2022-84627
Publication status	Published - 2022
MoE publication type	A4 Article in a conference publication
Event	ASME 2022 Pressure Vessels and Piping Conference, PVP 2022 - Las Vegas, United States Duration: 17 Jul 2022 → 22 Jul 2022

Conference

Conference	ASME 2022 Pressure Vessels and Piping Conference, PVP 2022
Country/Territory	United States
City	Las Vegas
Period	17/07/22 → 22/07/22

Keywords

environment
fatigue
stainless steel

Access to Document

10.1115/PVP2022-84627

Cite this

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title = "Environment Assisted Fatigue – Rules, Assumptions and Challenges for Fatigue Management of Primary Piping",

abstract = "This paper introduces and discusses the commonly used methods for calculating environmental penalty factors (Fen) to be used in fatigue assessment of stainless reactor components. Three alternative methods for determining Fen factors are introduced and instructed in the JSME S NF1-2009 Code in a language providing a designer the guidance needed for reliable and repeatable EAF assessment. Following these instructions together with the equations and parameters given in the NUREG/CR-6909 it is possible to obtain same Fen factors as by careful reading of the NUREG/CR-6909 alone. The NUREG/CR-6909, Rev. 1 contains notable amounts of valuable information, but instructions for application can be ambiguous or conflicting. An example related to the modified strain rate approach for determining Fen factors is provided.",

keywords = "environment, fatigue, stainless steel",

author = "Jussi Solin and Tommi Sepp{\"a}nen and Petri Lemettinen and Rami Vanninen and Erkki Pulkkinen",

note = "Funding Information: This work is part of the FatiMa project “Fatigue Management for LTO”, a sub-project of the Finnish Research Programme on Nuclear Power Plant Safety 2019-2022 (SAFIR2022). In addition to the generic program funding, Fortum and TVO provide also direct funds for execution of this project. Publisher Copyright: Copyright {\textcopyright} 2022 by ASME.; ASME 2022 Pressure Vessels and Piping Conference, PVP 2022 ; Conference date: 17-07-2022 Through 22-07-2022",

year = "2022",

doi = "10.1115/PVP2022-84627",

language = "English",

volume = "1",

booktitle = "ASME 2022 Pressure Vessels & Piping Conference",

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}

Solin, J , Seppänen, T, Lemettinen, P, Vanninen, R & Pulkkinen, E 2022, Environment Assisted Fatigue – Rules, Assumptions and Challenges for Fatigue Management of Primary Piping. in ASME 2022 Pressure Vessels & Piping Conference. vol. 1, PVP2022-84627, American Society of Mechanical Engineers (ASME), ASME 2022 Pressure Vessels and Piping Conference, PVP 2022, Las Vegas, United States, 17/07/22. https://doi.org/10.1115/PVP2022-84627

Environment Assisted Fatigue – Rules, Assumptions and Challenges for Fatigue Management of Primary Piping. / Solin, Jussi ; Seppänen, Tommi; Lemettinen, Petri et al.
ASME 2022 Pressure Vessels & Piping Conference. Vol. 1 American Society of Mechanical Engineers (ASME), 2022. PVP2022-84627.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Environment Assisted Fatigue – Rules, Assumptions and Challenges for Fatigue Management of Primary Piping

AU - Solin, Jussi

AU - Seppänen, Tommi

AU - Lemettinen, Petri

AU - Vanninen, Rami

AU - Pulkkinen, Erkki

N1 - Funding Information: This work is part of the FatiMa project “Fatigue Management for LTO”, a sub-project of the Finnish Research Programme on Nuclear Power Plant Safety 2019-2022 (SAFIR2022). In addition to the generic program funding, Fortum and TVO provide also direct funds for execution of this project. Publisher Copyright: Copyright © 2022 by ASME.

PY - 2022

Y1 - 2022

N2 - This paper introduces and discusses the commonly used methods for calculating environmental penalty factors (Fen) to be used in fatigue assessment of stainless reactor components. Three alternative methods for determining Fen factors are introduced and instructed in the JSME S NF1-2009 Code in a language providing a designer the guidance needed for reliable and repeatable EAF assessment. Following these instructions together with the equations and parameters given in the NUREG/CR-6909 it is possible to obtain same Fen factors as by careful reading of the NUREG/CR-6909 alone. The NUREG/CR-6909, Rev. 1 contains notable amounts of valuable information, but instructions for application can be ambiguous or conflicting. An example related to the modified strain rate approach for determining Fen factors is provided.

AB - This paper introduces and discusses the commonly used methods for calculating environmental penalty factors (Fen) to be used in fatigue assessment of stainless reactor components. Three alternative methods for determining Fen factors are introduced and instructed in the JSME S NF1-2009 Code in a language providing a designer the guidance needed for reliable and repeatable EAF assessment. Following these instructions together with the equations and parameters given in the NUREG/CR-6909 it is possible to obtain same Fen factors as by careful reading of the NUREG/CR-6909 alone. The NUREG/CR-6909, Rev. 1 contains notable amounts of valuable information, but instructions for application can be ambiguous or conflicting. An example related to the modified strain rate approach for determining Fen factors is provided.

KW - environment

KW - fatigue

KW - stainless steel

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VL - 1

BT - ASME 2022 Pressure Vessels & Piping Conference

PB - American Society of Mechanical Engineers (ASME)

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Y2 - 17 July 2022 through 22 July 2022

ER -

Environment Assisted Fatigue – Rules, Assumptions and Challenges for Fatigue Management of Primary Piping

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