Active and passive combined safety system and method for nuclear power plant

Abstract

The invention relates to the technical field of nuclear power. The invention particularly discloses an active and passive combined overall safety system and method for a pressurized water reactor nuclear power plant. The system comprises a safety injection system consisting of an active safety injection system and a passive safety injection system, a reactor cavity water injection system consisting of an active reactor cavity water injection system and a passive reactor cavity water injection system, a containment heat removal system consisting of an active containment spraying system and a passive containment heat removal system, and a steam generator secondary side heat removal system consisting of an auxiliary water supply system, a steam turbine bypass discharge system and a secondaryside passive residual heat removal system. According to the invention, the passive safety system is used as the supplement of the active safety system; the passive technology is fully utilized, the depth defense level and requirements of the nuclear power plant are comprehensively considered, depth defense is enhanced, energy removal under predicted operation events, design benchmark working conditions and design expansion working conditions (including serious accidents) possibly occurring in the nuclear power plant is better coped with, and the safety of the nuclear power plant is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and in particular relates to an overall safety system and a method for combining active and passive functions of a pressurized water reactor nuclear power plant. Background technique [0002] Generally speaking, there are two safety design concepts for nuclear reactors. One is the active system. This type of system has the advantages of controllability, high technology maturity, and stable heating capacity. It can be efficiently and reliably corrected when the nuclear power plant deviates from normal. The disadvantage is that the requirements for power supply are relatively high; the other is passive system, which completely depends on natural laws, such as gravity, natural convection and other phenomena. The design of this kind of system is simplified, which reduces the power supply. Dependence, the disadvantage is that the human intervention is poor, and there are many factors that affect...

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Problems solved by technology

[0002] Generally speaking, there are two safety design concepts for nuclear reactors. One is the active system. This type of system has the advantages of controllability, high technology maturity, and stable heating capacity. It can be efficiently and reliably corrected when the nuclear power plant deviates from normal. The disadvantage is that the requirements for power supply are relatively high; the other is passive system, which completely depends on natural laws, such as gravity, natural convection and other phenomena. The design of this kind of system is simplified, which reduces the power supply. Reliance, the disadvantage is that the human intervention is poor, and there are many factors affecting the operating status

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