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Proceedings Paper

Application of risk-based analysis to evaluate nonintrusive examination methods
Author(s): Kenneth R. Balkey; Nancy B. Closky; William J. McAllister
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Paper Abstract

Non-intrusive examination methods are currently being developed and initially implemented to evaluate the performance and operability of check valves in nuclear power plants. These methods are used in lieu of disassembling and inspecting the check valves to detect underlying causes or degradation that may lead to failure of this important equipment when it is called upon to perform a critical safety function. Risk-based methods are currently being developed to determine which check valves and their inherent failure modes are important to the safety of the plant from a core damage risk perspective. Risk-based methods are also emerging to evaluate the effectiveness of current and emerging inservice testing methods, such as non- intrusive examinations, particularly for the risk-significant check valves. Finally, decision analysis and value-impact methods are used to evaluate the safety and economic trade-offs in the development of an inservice test program for all check valves. This paper summarizes the latest work from this application currently being developed within the nuclear industry.

Paper Details

Date Published: 12 May 1995
PDF: 9 pages
Proc. SPIE 2454, Nondestructive Evaluation of Aging Utilities, (12 May 1995); doi: 10.1117/12.209357
Show Author Affiliations
Kenneth R. Balkey, Westinghouse Electric Corp. (United States)
Nancy B. Closky, Westinghouse Electric Corp. (United States)
William J. McAllister, Westinghouse Electric Corp. (United States)

Published in SPIE Proceedings Vol. 2454:
Nondestructive Evaluation of Aging Utilities
Walter G. Reuter, Editor(s)

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