Prismatic high-temperature gas cooled reactor lower reflecting layer, reactor core and high-temperature gas cooled reactor

Abstract

The invention relates to a prismatic high-temperature gas cooled reactor lower reflecting layer, a reactor core and a high-temperature gas cooled reactor, and belongs to the technical field of nuclear. The lower reflecting layer is composed of a plurality of graphite bricks, wherein the graphite bricks are internally provided with cavities and channels, the cavities are located in the centers of the graphite bricks and are used for circulating a coolant, the channel is positioned at the upper section of the graphite brick, the inlet of the channel is positioned on the upper end surface of the graphite brick and is communicated with a reactor core coolant outlet, and the outlet of the channel is communicated with the cavity. The lower reflecting layer structure provided by the invention can be used for converging the coolant, improving the uniformity of the coolant flowing out of the reactor core, and adjusting the coolant flow distribution through the structural arrangement so as to flatten the temperature distribution of the reactor core.

Description

technical field [0001] The invention belongs to the field of nuclear technology, in particular to a prismatic high-temperature gas-cooled reactor lower reflection layer, a reactor core and a high-temperature gas-cooled reactor. Background technique [0002] In the existing prismatic high-temperature gas-cooled reactor, the lower reflector structure only has the basic neutron reflection function, and has not designed the function of collecting the fluid in each coolant channel, nor has the function of adjusting the flow distribution of the core coolant , the graphite bricks in the lower reflection layer have through holes, which are consistent with the structure of the graphite bricks in the fuel area. [0003] However, in the existing high-temperature gas-cooled reactor, there are problems such as unsatisfactory coolant flow distribution when the coolant enters the core fuel area, and uneven distribution of the flow field when the coolant flows out of the core, resulting in ...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing high-temperature gas-cooled reactor, there are problems such as unsatisfactory coolant flow distribution when the coolant enters the core fuel area, and uneven distribution of the flow field when the coolant flows out of the core, resulting in excessive local temperature of the core fuel. The high pressure and high temperature of the lower components of the core will have a negative impact on the safe operation of the high-temperature gas-cooled reactor. Therefore, it is necessary to develop a new structure of graphite bricks for the lower reflective layer to improve the safety of the high-temperature gas-cooled reactor.

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