United States Nuclear Regulatory Commission - Protecting People and the Environment

Evaluation of Aging and Environmental Qualification Practices for Power Cables Used in Nuclear Power Plants (NUREG/CR-6794)

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Publication Information

Manuscript Completed: August 2002
Date Published:
January 2003

Prepared by:
M. Villaran, R. Lofaro

Contributors:
E. Grove, P. Soo

Brookhaven National Laboratory
Upton, NY 11973-5000

S. K. Aggarwal, NRC Program Manager

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

NRC Job Code W6822

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Abstract

An aging assessment of safety-related power cables used in commercial nuclear power plants has been performed to determine the effects of aging degradation. This study is based on the review and analysis of past operating experience, as reported in the Licensee Event Report, Nuclear Plant Reliability Data System, and Equipment Information and Performance Exchange databases. In addition, documents prepared by the Nuclear Regulatory Commission that identify significant issues or concerns related to power cables have been reviewed. Based on the results of the aforementioned reviews, predominant aging characteristics are identified and potential condition monitoring techniques are evaluated. The results of the aging assessment were then used to evaluate environmental qualification practices for power cables to determine if all significant aging mechanisms are appropriately addressed.

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