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Ten Years Experience on Inconel Alloys Since the Bugey Leak in 1991

[+] Author Affiliations
François Champigny, Claude Pages

Electricité de France, Saint-Denis, France

Claude Amzallag

Electricité de France, Lyon, France

François Billy

Electricité de France, Chatou, France

Paper No. PVP2002-1369, pp. 17-23; 7 pages
  • ASME 2002 Pressure Vessels and Piping Conference
  • Selected Topics on Aging Management, Reliability, Safety and License Renewal
  • Vancouver, BC, Canada, August 5–9, 2002
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4655-5
  • Copyright © 2002 by ASME


Base nickel alloys like Inconel 600 or 182 are particularly sensitive to stress corrosion cracking. This fact is well known since Corriou’works at the beginning of the sixties and its applications to the steam generator tubes in the seventies. For the RP vessel heads, the major fact of the nineties was the leak that occurred on one penetration in 1991 in the French NPP unit of Bugey. Several important decisions were taken after discover of this leak. First of them was to understand why it appeared so quickly, then test repairs for the Bugey case, then decide to replace all vessel heads considering that the repair solutions was to high cost. In parallel many developments were launched to establish laws for PWSCC and develop non-destructive methods to inspect the head penetrations. The conclusions obtained show the decision was good and no new leak happened on the VH penetrations.

Copyright © 2002 by ASME
Topics: Alloys , Leakage



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