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Potentially Damaging Failure Modes of High- and Medium-Voltage Electrical Equipment (NUREG/CR-3122)

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Publication Information

Manuscript Completed: July 1983
Date Published: August 1983

Prepared by H. C. Hoy
Oak Ridge National Laboratory Oak Ridge, TN 37830

Prepared for
Office for Analysis and Evaluation of Operational Data
U.S. Nuclear Regulatory Commission
Washington, D.C. 20555
NRC FIN B1672

Availability Notice


Abstract

The electrical equipment failures of both nuclear and nonnuclear public utilities were reviewed. Those failures that could pose an additional problem to surrounding and connected equipment were defined.The literature was searched; utilities, repair shops, and large electrical equipment users were contacted or failure information. The data were reviewed in detail, and failure modes were determined. Sample cascade failures are discussed. The failure rate of electrical equipment in utilities is historically quite low. Nuclear plants record too few failures to be statistically valid, but failures that have been recorded show that good design usually restricts the failure to a single piece of equipment.



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