United States Nuclear Regulatory Commission - Protecting People and the Environment

Aging Assessment of Safety-Related Fuses Used in Low- and Medium- Voltage Applications in Nuclear Power Plants (NUREG/CR-6763)

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Publication Information

Manuscript Completed: January 2002
Date Published: March 2002

Prepared by:
R. Lofaro, M. Villaran

Brookhaven National Laboratory
Energy Sciences and Technology Department
Upton, NY 11973-5000

D. Nguyen, NRC Technical Monitor

Prepared for:
Division of Engineering
Office of Nuclear Reactor Regulation
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

NRC Job Code J2831

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Abstract

An aging assessment of safety-related fuses used in commercial nuclear power plants has been performed to determine if aging degradation is a concern for these components in older nuclear power plants. This study is based on the review and analysis of past operating experience, as reported in the Licensee Event Report database, the Nuclear Plant Reliability Data System, and the Equipment Performance and Information Exchange System database. In addition, documents prepared by the Nuclear Regulatory Commission that identify significant issues or concerns related to fuses have been reviewed, and one fuse manufacturer was visited to obtain their insights. Based on the results of the aforementioned reviews, predominant aging characteristics are identified and potential condition monitoring techniques are discussed.

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