Fire Risk Analysis for Nuclear Power Plants

摘要

A methodology for evaluating the frequency of severe consequences due to fires in nuclear power plants is presented. The methodology produces a list of accident scenarios and then assesses the frequency of occurrence of each. Its framework is given in six steps. In the first two steps, the accident scenarios are identified qualitatively and the potential of fires to cause initiating events is investigated. The last four steps are aimed at quantification. The frequency of fires is obtained for different compartments in nuclear power plants using Bayesian techniques. The results are compared with those of classical methods and the variation of the frequencies with time is also examined. The combined effects of fire growth, detection, and suppression on component failure are modeled. The susceptibility of cables to fire and their failure modes are discussed. Finally, the limitations of the methodology and suggestions for further research are given.