Nuclear power plant emergency water injection system

Abstract

The invention relates to an emergency water injection system for a nuclear power plant under accident conditions. The emergency water injection system comprises water absorption pipes, emergency mobile pump assemblies and water pipes, wherein one ends of the water absorption pipes are connected with water inlets of the emergency mobile pump assemblies, and the other ends of the water absorption pipes are connected with a water source; one ends of the water pipes are connected to water outlets of the emergency mobile pump assemblies, and the other ends of the water pipes are connected to at least one water injection part; each emergency mobile pump assembly comprises a buffer water tank, and each water inlet comprises at least one buffer water tank water replenishing interface and at least one direct water taking interface. According to the emergency water injection system for the nuclear power plant, one emergency mobile pump assembly can meet multiple emergency water injection functions of a machine set, so that the number of facilities is reduced, the intercommunity and the universality of the facilities are improved, and the security risk that the facilities are jointed improperly is lowered.

Description

technical field [0001] The invention relates to the technical field of nuclear power, and more specifically, relates to an emergency water injection system of a nuclear power plant. Background technique [0002] The occurrence of nuclear accidents puts forward higher requirements for the safety of nuclear power plants. In order to deal with the accidents of existing nuclear power plants under similar working conditions in Fukushima NPP and improve the response capability, refer to the causes and processes of accidents in Fukushima NPP. On the basis of the existing system configuration and accident handling procedures, it is necessary to further study to analyze the response capabilities of existing nuclear power plants and to propose improvement suggestions for corresponding weak links. [0003] At the site of a nuclear power plant, under beyond-design basis conditions such as plant-wide blackout (SBO), nuclear power plant reactor shutdown, steam turbine shutdown, main pump ...

AI Technical Summary

Problems solved by technology

[0003] At the site of a nuclear power plant, under conditions beyond the design basis such as a plant-wide blackout (SBO), the nuclear power plant reactor shutdown, steam turbine shutdown, main pump and circulating water pump shutdown, the normal safety systems of the nuclear power plant (such as safety injection system, containment vessel) sprinkler system, auxiliary water supply system, spent fuel pool cooling system, etc.) may stop working, and at the same time, other types of natural disasters such as earthquakes, heavy rainfall, mudslides, typhoons, etc., and even multiple severe natural disasters may occur simultaneously. Eventually, the entire plant will be powered off. Once such a small probability accident occurs, it will greatly affect the safety of the nuclear power plant.

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