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High cycle thermal fatigue Issues in PWR nuclear power plants,life time improvement of some austenitic stainless steelcomponents

Published online by Cambridge University Press:  23 March 2007

J. -A. Le Duff ,
A. Lefrançois ,
Y. Meyzaud ,
J.-Ph. Vernot ,
D. Martin ,
J. Mendez  and
Y. Lehericy
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Abstract

Examples of high cycle thermal fatigue (HCTF) damage cases onPWR austenitic stainless steel components are reported. High cyclethermal fatigue risk is primarily due to mixing of cold and hot water,unexpected leaks of cold water through check valves or to turbulentpenetration of hot water running in a main pipe into a connected line.When such thermal fatigue issues are identified in PWR powerplants, manufacturing improvement such as inner surface polishingof austenitic stainless steel parts can be performed to increase thefatigue resistance of the components.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 104 , Issue 3: Haut-fourneauAciérieFour électriqueLaminageUtilisation de l'acier , March 2007 , pp. 156 - 162
Copyright
© La Revue de Métallurgie, 2007

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