Grade and Temperature Dependent Reference Curves for Realistic Fen Quantification of Austenitic Stainless Steels

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2 Citations (Scopus)

Abstract

Environmental effects of LWR coolant need to be factored in when defining cumulative fatigue usage of primary circuit components. The basis is a set of codified design rules and fatigue design curves, based on experimental data. To accurately quantify environmental effects, the reference curve in air to which fatigue life in water is compared shall be as reliable as possible. Literature studies and accumulated data at VTT reveal that the use of common reference curves for a wide range of austenitic stainless steel alloys and temperatures is unreliable. Some design codes already include measures to consider this but ASME III is not yet among them. The ASME III design curve is adopted from NUREG/CR-6909 and contains no consideration for dependence of temperature or stainless steel grade. Two different stainless steel grades, AISI 304L and 347, have previously been used in environmentally-assisted fatigue experiments at VTT. In this paper, reference curves for the AISI 304L heat are presented at room temperature and 325 °C to complement the curves already available for AISI 347. Demonstration of realistic environmental effect quantification is done using these reference curves as an alternative to the NUREG methodology.
Original languageEnglish
Title of host publicationASME 2020 Pressure Vessels & Piping Conference
Subtitle of host publicationCodes and Standards
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages9
Volume1
ISBN (Print)978-0-7918-8381-5
DOIs
Publication statusPublished - 28 Oct 2020
MoE publication typeA4 Article in a conference publication
EventASME 2020 Pressure Vessels and Piping Conference, PVP 2020: Online - Virtual, Virtual, Online
Duration: 3 Aug 20203 Aug 2020

Publication series

SeriesAmerican Society of Mechanical Engineers. Pressure Vessels and Piping Division. Publication PVP
Volume2020
ISSN0277-027X

Conference

ConferenceASME 2020 Pressure Vessels and Piping Conference, PVP 2020
CityVirtual, Online
Period3/08/203/08/20

Keywords

  • EAF
  • Fatigue
  • LCF
  • Stainless steel

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