United States Nuclear Regulatory Commission - Protecting People and the Environment

Literature Review of Environmental Qualification of Safety-Related Electric Cables (NUREG/CR-6384, Volume 1, Part 1)

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Publication Information

Manuscript Completed:October 1995
Date Published: April 1996

Prepared by:
M. Subudhi

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 Codes W6168/W6169

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Abstract

This report summarizes the findings from a review of published documents dealing with research on the environmental qualification of safety-related electric cables used in nuclear power plants. Simulations of accelerated aging and accident conditions are important considerations in qualifying the cables. Significant research in these two areas has been performed in the United States and abroad. The results from studies in France, Germany, and Japan are described in this report. In recent years, the development of methods to monitor the condition of cables has received special attention. Tests involving chemical and physical examination of cable's insulation and jacket materials, and electrical measurements of the insulation properties of cables are discussed. Although there have been significant advances in many areas, there is no single method which can provide the necessary information about the condition of a cable currently in service. However, it is possible that further research may identify a combination of several methods that can adequately characterize the cable's condition.