STUDY ON FLUCTUATION CHARACTERISTICS OF WATER INTAKE CHANNELS IN NPPS AND DISCUSSION ON CONTROL STANDARDS

抄録

This article summarized the test results of water level fluctuation characteristics of several typical domestic coastal NPPs in the water intake channel and pump house channel. From the current specification requirements, open channel entrance orientation, open channel length, internal boundary, pump house flow channel and long-term and short-period water level fluctuations, the impact of water level fluctuations in water intake channels and control standards are discussed and demonstrated. It is proposed that the filtering efficiency of the inlet channel, coarse grid, steel gate and fine grid in the pump room should be considered in the design, and the water level fluctuation limit of the water intake front pool can be appropriately relaxed. Regarding the long-period water level fluctuations of the open channel, short-period water level fluctuations mainly affect the liquid level difference before and after the rotating filter in the pump house channel, which may cause false alarms and normal operation of the pump and should be paid attention to in the specific design.