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Measures of Risk Importance And Their Applications (NUREG/CR-3385)
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Publication Information
Manuscript Completed: March 1983
Date Published: July 1983
Prepared by
W. E. Vesely, T. C. Davis, R. S. Denning, N. Saltos
Battelle Columbus Laboratories
505 King Avenue
Columbus, Ohio 43201
Prepared for
Division of Risk Analysis
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, D.C. 20555
NRC FIN B2386
Availability
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Abstract
The objectives of this work are to evaluate the importance of the
containment and the different safety functions as assessed in probabilistic
risk -analyses. To accomplish this objective, risk importance measures are
defined to evaluate a feature's importance in further reducing the risk and
its, importance in maintaining the present risk level. One defined importance
measure, called the feature's risk reduction worth, is useful for prioritizing feature improvements which can most reduce the risk. The other defined
importance, called the feature's risk achievement worth, is useful for prioritizing
features which are most important in reliability assurance and maintenance activities.
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