Nuclear power plant containment cooling system

Abstract

The invention provides a nuclear power plant containment cooling system, comprising: a plurality of heat exchange units disposed on the surface of a containment, with each heat exchange unit comprising a hot segment positioned within the containment and a cold segment positioned outside the containment and each heat exchange unit applied to guide heat of steam in the containment out of the containment sequentially through the hot segment and the cold segment. The invention uses the heat exchange units to replace original large-scale tube bundle heat exchangers with flexible arrangement in the containment, system composition is simplified, heat exchange unit processing technique is ripe, the economy of the system is improved; the heat exchange units are on one hand are flexibly arranged in the containment and can be bent arbitrarily with low requirement on arrangement space, and it is possible to be distribute them in the upper portion of the containment uniformly, thereby greatly improving heat exchange efficiency; through the proper distribution for the length of the hot and cold segments, it is possible to make the invention have air cooling capacity and maintain a longer operating time than water cooling, thereby greatly strengthening the reliability of the system.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant safety, in particular to a nuclear power plant containment cooling system. Background technique [0002] The utility model patent with the application number 201420085008.8 provides a nuclear-grade heat pipe heat exchanger suitable for reactors. The heat exchanger is neatly arranged, one side is inserted into the containment, and the other side is arranged in the header. The heat pipe contains a suction liquid core. On the one hand, the arrangement of heat pipes can only be arranged locally, which in turn can only cool local steam, thus limiting the heat exchange capacity; on the other hand, the use of water cooling at the cold end directly leads to the design of a larger water header, which cannot be realized Air-cooled, the reliability is lower than that of air-cooled heat exchangers. [0003] Invention patents with application numbers 201110437864.6 and 201410371287.9 ​​both set l...

AI Technical Summary

Problems solved by technology

On the one hand, it adopts a traditional tube-bundle heat exchanger, and its tube sheet and heat transfer tubes are connected by welding, expansion joints, etc. If individual heat transfer tubes break or leak, the entire heat exchanger must be isolated. Affects the safety and economy of nuclear power plants; on the other hand, it needs to design a complete set of complex systems for tube bundle heat exchangers to ensure their heat exchange capacity

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