Code Case N-597-2 provides procedures and acceptance criteria for the evaluation of piping items subjected to wall thinning mechanisms such as flow-accelerated corrosion (FAC). The acceptance criteria ensure that margins equivalent to those of the ASME B&PV Code are maintained. Subsequent to the publication of Code Case N-597-2, the U.S. Nuclear Regulatory Commission (NRC) found the Code Case conditionally acceptable. A number of task items have been undertaken by the ASME Section XI Working Group on Pipe Flaw Evaluation (WGPFE) to address the NRC conditions. A 2006 ASME Pressure Vessels and Piping (PVP) Division conference paper was published to provide an expanded explanation of the technical basis for Code Case N-597-2. A 2009 PVP paper was published to provide results of validation of evaluation procedures and acceptance criteria in Code Case N-597-2 against experimental and historic wall thinning events. More recently, revisions to Code Case N-597-2 have been made and were proposed as N-597-3. Significant changes have been made in the proposed revised Code Case to clarify the technical requirements and address the NRC concerns over N-597-2. The technical basis for revising Code Case N-597-2 is provided in this paper.
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ASME 2015 Pressure Vessels and Piping Conference
July 19–23, 2015
Boston, Massachusetts, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5692-5
PROCEEDINGS PAPER
Technical Basis for Revisions to ASME Section XI Code Case N-597-2 on Requirements for Analytical Evaluation of Pipe Wall Thinning
Douglas A. Scarth,
Douglas A. Scarth
Kinectrics, Inc., Toronto, ON, Canada
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Michael Davis,
Michael Davis
Nuclear Utility Fatigue and Stress Engineer (Retired), Charlotte, NC
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Steven X. Xu
Steven X. Xu
Kinectrics, Inc., Toronto, ON, Canada
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Douglas A. Scarth
Kinectrics, Inc., Toronto, ON, Canada
Michael Davis
Nuclear Utility Fatigue and Stress Engineer (Retired), Charlotte, NC
Phil Rush
MPR Associates, Alexandria, VA
Steven X. Xu
Kinectrics, Inc., Toronto, ON, Canada
Paper No:
PVP2015-45099, V01AT01A006; 7 pages
Published Online:
November 19, 2015
Citation
Scarth, DA, Davis, M, Rush, P, & Xu, SX. "Technical Basis for Revisions to ASME Section XI Code Case N-597-2 on Requirements for Analytical Evaluation of Pipe Wall Thinning." Proceedings of the ASME 2015 Pressure Vessels and Piping Conference. Volume 1A: Codes and Standards. Boston, Massachusetts, USA. July 19–23, 2015. V01AT01A006. ASME. https://doi.org/10.1115/PVP2015-45099
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