The identification of the PWSCC (Primary Water Stress Corrosion Cracking) mechanism responsible for leakage from an Alloy 600 nozzle tube of a PWR RPV (pressurized water reactor reactor pressure vessel) head more than a decade ago led to a significant body of research into understanding the phenomenon and to development of bases for safely managing primary pressure boundary integrity. However, the relatively recent experience at Davis-Besse, wherein penetration leakage resulted in significant vessel head material wastage, led to the heretofore unconsidered issue of vessel failure risk due to head rupture. This paper addresses, in preliminary fashion, one key input to determining the risk associated with head material wastage and potential rupture — the local environmental and fluid conditions associated with a range of leak paths. The results indicate a need for rigorous prediction of fluid conditions for a range of leak situations to help establish criteria for addressing penetration leaks.
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12th International Conference on Nuclear Engineering
April 25–29, 2004
Arlington, Virginia, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4688-1
PROCEEDINGS PAPER
Do All RPV Head Penetration Leaks Have the Potential to Cause Head Wastage? Available to Purchase
Chandra M. Roy,
Chandra M. Roy
Exponent Failure Analysis Associates, Irvine, CA
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John R. Fessler,
John R. Fessler
Exponent Failure Analysis Associates, Irvine, CA
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Jude R. Foulds,
Jude R. Foulds
Exponent Failure Analysis Associates, Menlo Park, CA
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Ronald M. Latanision,
Ronald M. Latanision
Exponent Failure Analysis Associates, Natick, MA
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David E. Taylor
David E. Taylor
Exponent Failure Analysis Associates, New York, NY
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Chandra M. Roy
Exponent Failure Analysis Associates, Irvine, CA
John R. Fessler
Exponent Failure Analysis Associates, Irvine, CA
Jude R. Foulds
Exponent Failure Analysis Associates, Menlo Park, CA
Ronald M. Latanision
Exponent Failure Analysis Associates, Natick, MA
David E. Taylor
Exponent Failure Analysis Associates, New York, NY
Paper No:
ICONE12-49541, pp. 375-379; 5 pages
Published Online:
November 17, 2008
Citation
Roy, CM, Fessler, JR, Foulds, JR, Latanision, RM, & Taylor, DE. "Do All RPV Head Penetration Leaks Have the Potential to Cause Head Wastage?." Proceedings of the 12th International Conference on Nuclear Engineering. 12th International Conference on Nuclear Engineering, Volume 2. Arlington, Virginia, USA. April 25–29, 2004. pp. 375-379. ASME. https://doi.org/10.1115/ICONE12-49541
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