RETRAN Applications at Florida Power & Light to Support Operations and Training

Three applications of the RETRAN code at Florida Power & Light Company (FPL) to enhance plant operational margin and support training simulators are presented. Two of the applications are intended to increase plant availability, one by reducing the frequency of unnecessary reactor trips on turbine trips during power ascension and the other by providing a simple relationship between electrical frequency and reactor coolant flow. This relationship is then used in selecting electrical load-shedding schemes. The third application is in the area of training simulators, where special RETRAN best-estimate analyses have been used as part of the acceptance testing program for the FPL simulators.