Reactor core system of prismatic air-cooled micro reactor

Abstract

The invention discloses a reactor core system of a prismatic air-cooled micro reactor, which comprises a reactor core active area, a reflecting layer and a control assembly, wherein the reactor core active area comprises a plurality of prismatic fuel assemblies, the plurality of fuel assemblies are arranged into a plurality of subareas in the radial direction of the reactor core active area, and are arranged into a plurality of layers in the axial direction of the reactor core active area; the reflecting layer wraps the reactor core active area and is used for preventing neutron leakage; and the control assembly is arranged in the reactor core active area and the reflecting layer and is used for controlling the reactor core to shut down. The reactor core system of the prismatic air-cooled micro reactor has excellent inherent safety.

Description

technical field [0001] The invention belongs to the field of nuclear technology, and in particular relates to a core system of a prismatic air-cooled micro-reactor. Background technique [0002] How to improve the safety of nuclear power plants has always been a key issue in the development of nuclear power. [0003] At present, the nuclear power units in operation in China are mainly second-generation pressurized water reactors, third-generation pressurized water reactors represented by "Hualong One", and pebble bed high-temperature gas-cooled reactors. [0004] PWR mainly improves its safety through redundant design and special safety facilities, but this will lead to more complex nuclear power plant systems and higher costs. The pebble bed high-temperature gas-cooled reactor has a good inherent safety, but the spherical fuel rubs against each other on the pebble bed, which will form a certain amount of radioactive dust and be discharged to the environment. Moreover, the ...

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Problems solved by technology

[0004] PWR mainly improves its safety through redundant design and special safety facilities, but this will lead to more complex nuclear power plant systems and higher costs. Some PWRs also use passive safety designs such as natural circulation, but they can only be The pebble bed high-temperature gas-cooled reactor has good inherent safety, but the spherical fuel rubs against each other on the pebble bed, which will form a certain amount of radioactive dust and be discharged to the environment, and the pebble bed core components are not easy to replace , the online refueling system is relatively complex

[0005] In addition, although the pressurized water reactor technology is mature, it has always had natural defects in safety. In the case of nuclear power plant loss of water and power failure, serious accidents such as reactor melting may occur, such as the Three Mile Island accident and the Fukushima nuclear accident.

[0006] The prismatic gas-cooled reactor has extremely high safety, but the prismatic gas-cooled reactor has not yet been built in China, and there are relatively few studies on the prismatic gas-cooled reactor, which is still in the research stage

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