Reliability analysis for the power system of the nuclear ship Savannah

Abstract

The power system, including the power transmission, distribution, and support system, is one of the largest and most complex systems established by humans. In addition to the normal considerations of power plants on board, the design of nuclear power merchant ships is also based on the need for uninterruptible power supplies. Based on the relevant data of the nuclear power ship “Savannah,” the qualitative and quantitative analysis is performed using the fault tree analysis method to analyze the reliability of its power system. The probability of basic events in certain accident conditions is evaluated according to the literature survey. In addition, this study also examines the common cause failure of diesel generators in the power system, as well as the analysis of sensitivity and importance of basic events. The installation of primary, auxiliary, and emergency power stations, the use of automated equipment for generator synchronization and power conversion, and the application of special internal communication and alarm systems unique to nuclear-powered ships can effectively eliminate the possibility of complete power outages for Savannah.