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Risk-Based Inspection of Combustion Turbines

[+] Author Affiliations
Michael E. G. Schmidt

Industrial Risk Insurers

David A. Mauney

Structural Integrity Associates, Inc.

Paper No. 2000-GT-0189, pp. V003T02A011; 10 pages
  • ASME Turbo Expo 2000: Power for Land, Sea, and Air
  • Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration
  • Munich, Germany, May 8–11, 2000
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7856-9
  • Copyright © 2000 by ASME


Combustion turbine users, particularly in an unregulated environment, are faced with a multivariate optimizing problem. They need to run their machines in a way that ensures that the bondholders will be paid or maximizes shareholder value — or both, depending upon the owner’s finances. Meeting the financial challenge might require maximum reliability and availability at all times but it is more likely to require maximum reliability and availability at specific times, such as peak demand times of day or seasons. Maintenance is the biggest factor in reliability and availability control, and risk-based methods can focus maintenance for the best financial performance. One model can mathematically solve inspection program timing and component replacement decisions. Safety, environmental, financial and other constraints can bound the optimizing algorithm.

This paper outlines risk-based inspection program development. It focuses on the logical basis for a risk-based decision model, and briefly presents three simple examples. It references American Society of Mechanical Engineers (ASME) International documents that provide more information about risk-based inspection programs.

Copyright © 2000 by ASME



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