A safety system combining active and passive in a nuclear power plant and its method

Abstract

The invention belongs to the technical field of nuclear power, and specifically discloses an overall safety system and a method for combining active and passive safety in a pressurized water reactor nuclear power plant, including an active safety injection system and a passive safety injection system. The reactor cavity water injection system composed of the reactor cavity water injection system and the passive reactor cavity water injection system, the containment heat removal system composed of the active containment spray system and the passive containment heat removal system, and the auxiliary water supply system and the steam turbine bypass discharge. The secondary side heat removal system of the steam generator is composed of the system and the secondary side passive waste heat removal system. The present invention uses the passive safety system as a supplement to the active safety system, makes full use of passive technology, comprehensively considers the level and requirements of the defense in depth of the nuclear power plant, strengthens the defense in depth, and better copes with the predicted operation events and design of the nuclear power plant. Energy removal under baseline conditions, design extended conditions (including severe accidents), greatly improves the safety of nuclear power plants.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and in particular relates to an integral safety system combining active and passive components in a pressurized water reactor nuclear power plant and a method thereof. Background technique [0002] Generally speaking, there are two safety design concepts for nuclear reactors. One is active system. This type of system has the advantages of controllability, high technical maturity and stable thermal capacity. It can be efficiently and reliably corrected when the nuclear power plant deviates from normal. Deviation, 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 such systems is simplified and reduces the power supply. Dependency, the disadvantage is that the human intervention is poor, and there are many factors affecting ...

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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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