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Overview of Flaw Assessment Methods in the RSE-M Code

[+] Author Affiliations
Patrick Le Delliou

Electricité de France, Moret s/Loing Cedex, France

Jean-Philippe Sermage

Electricité de France, Villeurbanne Cedex, France

Bruno Barthelet

Electricité de France, St Denis Cedex, France

Paper No. PVP2004-2728, pp. 77-86; 10 pages
  • ASME/JSME 2004 Pressure Vessels and Piping Conference
  • RPV Integrity and Fracture Mechanics
  • San Diego, California, USA, July 25–29, 2004
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4676-8
  • Copyright © 2004 by ASME


The RSE-M Code provides rules and requirements for inservice inspection of French Pressurized Water Reactor power plant components. Appendices 5.3 and 5.4 of the Code give non mandatory guidance for analytical evaluation of flaws, i.e. fracture mechanics analyses based on simplified methods. Flaw assessment aims to calculate the initiation and the subsequent propagation of the crack under cyclic loading (fatigue analysis) and then to assess the crack stability, by comparing the applied J integral to the toughness of the material. This paper shows an overview of the R&D work undergone to make possible an analytical approach: • analytical formulas for the elastic stress field in elbows under in-plane, out-of-plane and torsion moments, • stress intensity factors solutions based on the influence coefficient method for surface and embedded cracks in pipes, • simplified methods to estimate the J integral for various configurations of piping, flaws and loading. These methods are shortly presented, including their field of application and their validation.

Copyright © 2004 by ASME



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