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Analytical Method for the Calculation of J Parameter for Surface Cracks in Piping Welds

[+] Author Affiliations
S. Marie, Y. Kayser, B. Drubay

CEA, Gif-sur-Yvette, France

P. Le Delliou

EDF R&D, Moret-sur-Loing, France

P. Gilles

AREVA ANP, Paris la Défense, France

Bruno Barthelet

EDF Industry, St. Denis, France

J. Schwab

EDF/SEPTEN, Villeurbanne, France

Paper No. PVP2008-61230, pp. 229-235; 7 pages
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4826-5 | eISBN: 0-7918-3828-5
  • Copyright © 2008 by ASME


RSE-M and RCC-MR codes provide flaw assessment methodologies and related tools for Nuclear Power Plant. AREVA, CEA and EDF developed in particular a large set of compendia for the calculation of the parameter J for various components (plates, pipes, elbows, ...) and various defect geometries. The last step of these developments deals with the weld joints : since 2004, the partners are developing a methodology to calculate the J parameter for a defect located in a weld, less conservative than usual methods. This methodology is based on the definition of an equivalent material that leads to the same J value (with same loading conditions and defect geometry) than the bi-material component. The stress-strain curve of this equivalent material is deduced from a combination of the tensile curves of the base metal and of the weld metal. The weigth coefficients applied are specifically defined for the J calculation and generalized to deal with any weld joint geometry.

Copyright © 2008 by ASME



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