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Probability-Based Evaluation of Selected Fire Protection Features in Nuclear Power Plants (NUREG/CR-4230)

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Publication Information
Abstract

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NUREG/CR-4230 (PDF - 3.35 MB)

Publication Information

Manuscript Completed: February 1985
Date Published: May 1985

Prepared by
M. A. Azarm, J. L. Boccio

Brookhaven National Laboratory
Department of Nuclear Energy
Upton, NY 11973

Prepared for
Division of Engineering
Office of Nuclear Reactor Regulation
U.S. Nuclear Regulatory Commission
Washington, D.C. 20555
NRC FIN A3710

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Abstract

A probabilistic approach for the evaluation of major fire protection measures in nuclear power plants is described. The methods developed are applied to two representative fire areas -- one similar to a cable routing room and the other typical of a diesel generator room. The fire areas chosen for application, the fire scenarios described, and the various fire-damage states specified in the two illustrative examples are used to evaluate those fire-protection guidelines which deal with automatic/manual fire detection and suppression systems, rated barriers, divisional separation, drainage systems, dampers, and fire rating of electrical cables. Tabular results are presented, which reflect the relative merits of these systems/features in terms of conditional probabilities of achieving various room-damage states. The conclusions drawn and the lessons learned through the course of this study are discussed, and the areas that may need further investigation are identified.