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Non-Proprietary Application of ASME Code Section III, Appendix N, to SONGS Replacement Steam Generators

[+] Author Affiliations
R. D. Blevins

Independent Consultant, San Diego, CA

Paper No. PVP2017-65529, pp. V004T04A044; 8 pages
  • ASME 2017 Pressure Vessels and Piping Conference
  • Volume 4: Fluid-Structure Interaction
  • Waikoloa, Hawaii, USA, July 16–20, 2017
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5797-7
  • Copyright © 2017 by ASME


Flow-induced vibration analysis of the San Onofre Nuclear Generating Station (SONGS) Replacement Steam Generators is made using non-proprietary public data for these steam generators on the Nuclear Regulatory Commission public web site, www.NRC.com. The analysis uses the methodology of Appendix N Section III of the ASME Boiler and Pressure Vessel Code, Subarticle N-1300 Flow-Induced Vibration of Tubes and Tube Banks. First the tube geometry is assembled and overall flow and performance parameters are developed at 100% design flow, then analysis is made to determine the flow velocity in the gap between tubes and tube natural frequencies and mode shapes. Finally, the mass damping and reduced velocity for tubes on the U bend are assembled and plotted on the ASME code Figure N-11331-4 fluid elastic stability diagram.

Copyright © 2017 by ASME



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