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SCC of Austenitic Stainless Steels Under Off-Normal Water Chemistry and Surface Conditions

Part II: Off Normal Chemistry—Long Term Oxygen Conditions and Oxygen Transients
  • Matthias Herbst
  • Renate Kilian
  • Nicolas Huin
  • Olivier Calonne
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

The field experience of austenitic stainless steels in PWR (Pressurized Water Reactor) primary circuits has been generally outstanding. However, the effect of so called “off normal” conditions still plays an important role regarding the SCC (Stress Corrosion Cracking) susceptibility of austenitic stainless steels (SS). Such off normal conditions can either be surface conditions or off normal water chemistry conditions, which is the topic of this paper. This paper summarizes evaluations of the SCC susceptibility of cold worked stainless steels in off normal oxygenated environment including transients. In order to study off normal chemistry conditions, SCC tests were performed in simulated PWR primary water conditions under either hydrogen water chemistry conditions or oxygenated conditions. Since the effect of transients are suspected to play a role under plant conditions, additional tests were performed with continuously changing from oxygenated to hydrogenated conditions and compared to results from tests under purely hydrogenated or oxygenated water chemistry conditions.

Keywords

SCC initiation Cold work Surface condition EAC Austenitic stainless steel PWR Off-normal chemistry Oxygen transients 

References

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Matthias Herbst
    • 1
  • Renate Kilian
    • 1
  • Nicolas Huin
    • 2
  • Olivier Calonne
    • 2
  1. 1.AREVA GmbH Technical CenterErlangenGermany
  2. 2.AREVA NP Technical CenterLe Creusot CedexFrance

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