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Application of a Dynamic Stress Theory to Pipe Leaks

[+] Author Affiliations
Robert A. Leishear

Westinghouse Savannah River Company, Aiken, SC

Paper No. PVP2006-ICPVT-11-93523, pp. 23-30; 8 pages
doi:10.1115/PVP2006-ICPVT-11-93523
From:
  • ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
  • Volume 3: Design and Analysis
  • Vancouver, BC, Canada, July 23–27, 2006
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4754-3 | eISBN: 0-7918-3782-3
  • Copyright © 2006 by Westinghouse Savannah River Company

abstract

Leaks in system piping used to transfer radioactive waste were attributed to water hammer. Ball valves leaked on several occasions and the cause of failure was not obvious. Facility records were used to determine the facility status at the time the leaks occurred. For one particular leak, valve manipulations controlling flow were shown to be coincident to the time of leak. The fluid transient pressures were calculated, and once the maximum pressures were established, the stresses on the equipment could be discerned. Water hammer was concluded to be the failure mechanism. To eliminate this failure mechanism, procedural and equipment modifications were made and further leaks have been eliminated.

Copyright © 2006 by Westinghouse Savannah River Company
Topics: Stress , Pipes , Leakage

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