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

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

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-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 languageEnglish
Title of host publicationASME 2022 Pressure Vessels & Piping Conference
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages9
Volume1
ISBN (Electronic)978-0-7918-8614-4
DOIs
Publication statusPublished - 2022
MoE publication typeA4 Article in a conference publication
EventASME 2022 Pressure Vessels and Piping Conference, PVP 2022 - Las Vegas, United States
Duration: 17 Jul 202222 Jul 2022

Conference

ConferenceASME 2022 Pressure Vessels and Piping Conference, PVP 2022
Country/TerritoryUnited States
CityLas Vegas
Period17/07/2222/07/22

Keywords

  • environment
  • fatigue
  • stainless steel

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