Methods for performing comparative analysis of nuclear power plant safety and estimating the residual risk, which are based on analysis of the 95 quantiles of the resulting distributions of the probability density of events which are important for safety, are formulated using an approximate calibration method of quantile estimates of the uncertainties and for the example of the results of a probability analysis of the safety of nuclear power plants in the USA which are presented in the NUREG-1150 report. The basic assumptions of the methods which make it possible to estimate the stationary risk are presented.
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