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Automated Ultrasonic Testing Optimizes Integrity Evaluations for Underground Piping Inspections

[+] Author Affiliations
Graig Cilluffo

Exelon Generation Company, Delta, PA

Paper No. PVP2014-28777, pp. V001T01A050; 6 pages
doi:10.1115/PVP2014-28777
From:
  • ASME 2014 Pressure Vessels and Piping Conference
  • Volume 1: Codes and Standards
  • Anaheim, California, USA, July 20–24, 2014
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4598-1
  • Copyright © 2014 by ASME

abstract

This paper will provide an overview of a recent buried piping inspection project leveraging automated ultrasonic testing methods to evaluate internal raw water corrosion at a reliably-operating, nuclear power plant. Discussion of current piping inspection practices for resolving non-planar flaws in raw water piping will be provided, emphasizing inspection performance requirements and a pilot project using automated scanning to optimize inspection value while minimizing field time and costs.

Contents include past buried piping integrity inspection scope / method selection, details on techniques and critical success factors for the project relative to integrity needs, lessons learned from field implementation, further experience from subsequent related inspections using automated and manual techniques for comparison, and recommended actions for future integrity assessments and mitigating actions. Results provided clear justification for this new approach above traditional evaluations performed in the past and may represent a best industry practice for buried pipe assessment.

While targeting buried piping applications, this method can be applied to many systems / locations vulnerable to corrosion. Guidance on applications, limitations, and areas for improvement are also provided from a project / field perspective.

Copyright © 2014 by ASME

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