Transient Simulation Study of Primary Loop Nitrogen-typed Pressurization System

Based on the fundamental of nitrogen pressure stabilizing, the lumped parameter method is adopted to develop the nitrogen pressure stabilizing system transient simulation model, which breaks through the limitations of the existing independent stabilizer model, realizes the direct coupling between the primary loop system and the nitrogen stabilizer, and verifies the program with the test data of the nitrogen pressure stabilizing system of the floating nuclear power plant. On this basis, a design method of nitrogen pressure stabilizing system based on sensitivity analysis is proposed. Compared with the existing design method, this design method can obtain the optimal configuration scheme of nitrogen pressure stabilizing system. At the same time, through the adaptive design, it can ensure that the pressure of the nitrogen pressure stabilizing system does not exceed the range of the temperature and pressure limit curve of the primary loop system during the start-up process.