Common-Cause Failure Database and AnalysisSystem: Event Data Collection, Classification, and Coding (NUREG/CR-6268, INEL/EXT-07-12969, Revision 1)

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Publication Information

Manuscript Completed: August 2007
Date Published:
September 2007

Prepared by:
T.E. Wierman/INL
D.M. Rasmuson/NRC
A. Mosleh/Univ. of MD

Risk & Reliability Assessment Department
Idaho National Laboratory
P.O. Box 1625
Idaho Falls, Idaho 83415-3850
Operated by Battelle Energy Alliance
for the U.S. Department of Energy

Department of Materials and Nuclear Engineering
University of Maryland
College Park, Maryland 20742-2115

A.D. Salomon, NRC Project Manager

Prepared for:
Division of Risk Assessment and Special Projects
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

NRC Job Code Y6546

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This report on the Common-Cause Failure Database and Analysis System presents an overview of common-cause failure (CCF) analysis methods for use in the U.S. commercial nuclear power industry. Idaho National Laboratory staff identify equipment failures that contribute to CCF events through searches of Licensee Event Reports, Nuclear Plant Reliability Data System failure reports, and Equipment Performance and Information Exchange failure reports. The staff then enter the event information into a personal computer-based data analysis system (CCF system). This report summarizes how data are gathered, evaluated, and coded into the CCF system, and describes the process for using the data to estimate probabilistic risk assessment common-cause failure parameters.

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