Safety injection integrated system

Abstract

The invention discloses a safety injection integrated system. The safety injection integrated system comprises a safety injection system and an advanced safety injection box, wherein the advanced safety injection box is arranged in a safety shell, is communicated with a pressure vessel and is used for filling the pressure vessel with cooling agent; and the safety injection system penetrates through the safety shell in a sealing manner, and two ends of the safety injection system are communicated with the pressure vessel and a reloading water tank outside the safety shell respectively for injecting the cooling agent in the reloading water tank into the pressure vessel. According to the safety injection integrated system, the safety injection flow rate required by accident analysis can be met through cooperation of the safety injection system and the advanced safety injection box; the quantity of equipment is reduced greatly and the system structure is simplified due to the integrated system formed by a single safety injection pump and a single advanced safety injection box through cooperation, the maintaining and repairing difficulty of the system and the parts is greatly lowered, the expenses of equipment purchasing, equipment installation, equipment operation, equipment maintenance and the like are reduced, and the building cost and the operation and maintenance costs of a nuclear power plant are reduced accordingly.

Description

technical field [0001] The invention relates to the field of nuclear power plant safety equipment, in particular to a safety injection complete system suitable for pressurized water reactor nuclear power plants. Background technique [0002] In a pressurized water reactor nuclear power plant, the heat energy generated by the reactor core is taken out of the reactor pressure vessel and into the steam generator through the primary feed water circuit. When the steam passes through the steam generator, the heat is transferred through thousands of heat transfer tubes. Feed water to the secondary circuit outside the pipe, and the feed water after releasing heat is sent back to the reactor pressure vessel by the main pump, so that it circulates back and forth. When a large breach loss of water accident occurs in the primary circuit, the cooling water in the reactor pressure vessel will decrease, and the temperature in the reactor pressure vessel will rise rapidly. At this time, if ...

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Problems solved by technology

[0005] Both of the above two safety injection systems are composed of multiple subsystems, both of which have the defects of a large number of equipment and a complex structure, resulting in a high requirement for the loading time of emergency equipment and difficult maintenance of the system and components, thus increasing the equipment cost. The cost of purchase, installation, operation and maintenance, etc., correspondingly increases the construction cost and operation and maintenance cost of the nuclear power plant

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