Diversified engineered safety system for nuclear reactor

Abstract

The invention aims at providing a diversified engineered safety system for a nuclear reactor. The diversified engineered safety system comprises a loop passive residual heat removal subsystem, a secondary-side passive residual heat removal subsystem of a steam generator fed with water by gravity, a total-pressure active residual heat removal subsystem, a low-pressure passive safety injection subsystem and a water-flooding and air-cooling combined passive containment cooling subsystem. All the subsystems can independently run or can be matched with one other, and parallel and redundant complete residual heat removal channels with diversified principles are built between a reactor core and an ultimate heat sink, so that a main system and the reactor core of the reactor can be quickly and efficiently cooled and the reactor can quickly enter a safety state in the initial stage of an accident. Even if one subsystem has a fault, other subsystems can still complete a complete and effective residual heat removal function for guaranteeing that the reactor is effectively cooled.

Description

technical field [0001] The invention relates to reactor safety facilities, in particular to a specially designed safety system with various principles and various heat transfer channels. Background technique [0002] The reactor design safety system is an important means to protect the safety of the reactor, and the removal of waste heat from the core is one of the most important functions of the design safety system. In the event of an accident, through the input of a special safety system, the residual heat of the core is discharged, and the cooling of the core and the containment are kept, thereby mitigating the consequences of the accident. According to its operating principle, ad hoc safety systems can be divided into active safety systems and passive safety systems. The active safety system is an active system, and its operation requires power and pumps to provide power; the operation of the passive safety system relies on measures such as natural circulation or gravi...

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Problems solved by technology

[0009] The ad hoc safety systems in the above three patent applications are different combinations of various core cooling methods and containment cooling methods. The main cold source is the cooling water stored inside or outside the containment, but it has not actually been established. A long-term effective passive waste heat discharge channel from the core to the final heat sink (environment), so this type of system cannot continue to operate effectively indefinitely, and cannot maintain the long-term safety of the reactor through passive means

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