Water supply system and working method thereof, and nuclear power plant

Abstract

The present invention provides a water supply system and a working method thereof, and a nuclear power plant. The water supply system is applied to the nuclear power plant and comprises: a first mainwater supply pipeline, wherein a first flow limiting valve is provided in the first main water supply pipeline, and the rated flow of the first main water supply pipeline is equal to the rated water delivery of the water supply system; a second main water supply pipeline, wherein the second main water supply pipeline is equipped with a second flow limiting valve, and the rated flow of the second main water supply pipeline is equal to the rated water delivery of the water supply system; a bypass water supply pipeline, wherein a third flow limiting valve is installed in the bypass water supply pipeline, and the rated flow rate of the bypass water supply pipeline is equal to the first preset ratio of the rated water delivery of the water supply system; and a controller, wherein the controlleris respectively connected with the first, second, and third flow limiting valves, and used to control the opening of the first, second, and third flow limiting valves, respectively. The water supplysystem, the working method thereof, and the nuclear power plant provided by the invention improve the stability of the water supply of the water supply system.

Description

technical field [0001] The invention relates to the technical field of nuclear power safety, in particular to a water supply system, a working method thereof, and a nuclear power plant. Background technique [0002] The steam generator (Steam Generator, referred to as SG) is one of the three major devices in the nuclear island. It is the boundary of the primary circuit and the secondary circuit of the pressurized water reactor nuclear power plant. After the steam is dried by the primary and secondary steam-water separators, it drives the turbogenerator to generate electricity. [0003] In the related art, the inlets of multiple water supply systems are connected to the same water supply main pipe, and the water supply main pipe supplies water to the multiple water supply systems respectively, and the outlets of the multiple water supply systems are connected to the pipelines of multiple SGs in one-to-one correspondence. Due to the different water supply conditions of multip...

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Problems solved by technology

[0004] Embodiments of the present invention provide a water supply system and its working method, and a nuclear power plant, so as to solve the problem that the water supply of SG is greatly affected by the water supply of other SGs caused by the fact that multiple SGs share one main water supply pipe in current nuclear power plants

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