Numerical Model of Secondary Loop of Marine Nuclear Power Plant Based on RELAP5 Code

This paper presents a new secondary loop of nuclear power plant system,including the main com-ponents of turbine,condenser,feed pump,and heater,based on RELAP5/MOD3.4 code. The research of the single component model adaptive authentication analysis and the local computing ability of the code have been studied. The results show that the steady-state calculation results of the RELAP5/MOD3.4 code are basically consistent with the design value,and the dynamic calculations can also meet the calculation accuracy requirement of the main components in secondary loop.