Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
The demand for circulating water in nuclear power plants is large, and most of the domestic nuclear power plants built and under construction at present use seawater direct current (DC) water supply system. Circulating water pumps use more configurations of two pumps per machine, and all of them are unit system water supply method. If the circulating water system adopts the expanded unit system DC water supply, there is a large height difference between the condenser located in the turbine plant and the water level in the inlet pool of the circulating water pump room. The larger flow rate of circulating pump, long pressure pipeline and more valves are the other reasons. Therefore, in the process of various hydraulic transients may occur water hammer phenomenon and system water supply interruption and other accidents. In order to ensure the safe operation of the system, detailed water hammer calculation and transition process analysis are required, and suitable protective measures are selected. The aims of this paper is to (1) carry out transient calculations for the circulating water system of nuclear power plants with two pumps per machine to expand the unit system water supply; (2) analyze various conditions that may occur in the transient operation of the circulating water system; (3) carry out simulation calculations for various conditions; (4) use the output results as a basis for system control, equipment design, equipment procurement, and system operation programming. It can provide an important guarantee for the reliable and economic operation of the system and the nuclear power unit.
