Risk Assessment on Nuclear Safety Supervision for Pressure Relief System

The FMEA method is applied to the nuclear safety supervision of the pressure relief system of marine nuclear power plant.The components and elements of the system are analyzed to find out the possible faults in the components of the system,and the influence of the various types of faults on the adjacent elements and the final impact.Then,the DLOWG operator is used to FMEA risk assessment.Using the character of operator which can reduce the unfairness of the evaluation and improve the calculation of RPN in the traditional FMEA,the importance ranks of the nuclear safety supervision items in each part of the pressure relief system are obtained,which has significant influence on the safety and reliability of nuclear power equipment.