A metal reactor internals suitable for spherical fuel and high temperature coolant

Abstract

The invention discloses a metal reactor internal suitable for spherical fuel and a high-temperature coolant. The reactor core comprises an upper shroud assembly arranged at the upper part and a reactor core shroud assembly arranged below an upper shroud part, the upper shroud assembly is detachably connected with the reactor core shroud assembly; an axial positioning device for axially limiting the upper-layer graphite is arranged below a pressing plate in the upper shroud assembly; the reactor core shroud assembly comprises a reactor core shroud, the inner wall of the reactor core shroud is provided with two or more circumferential limiting layers arranged in parallel up and down in the axial direction, each circumferential limiting layer is composed of a plurality of circumferential limiting parts arranged in the circumferential direction of the inner wall of the reactor core shroud, and the two or more circumferential limiting layers limit graphite arranged in the reactor core shroud in the circumferential direction. According to the invention, the graphite part arranged in the metal part can be contained and positioned by the metal part, and the problem of displacement betweenthe metal part and the graphite part caused by temperature change is prevented.

Description

technical field [0001] The invention relates to the nuclear field, in particular to a metal reactor internal component suitable for spherical fuel and high-temperature coolant. Background technique [0002] High temperature gas-cooled reactor is a reactor developed from ordinary graphite gas-cooled reactor. The working principle is: use graphite as a moderator, use gas helium as a coolant (this is "air cooling"), and the temperature of helium is as high as about 800 degrees (this is "high temperature") [0003] The specific process is: when the nuclear fuel in the reactor undergoes a nuclear reaction, neutrons are released, and the neutrons that are too fast will slow down after colliding with graphite (because only slow neutrons can effectively react with the uranium fuel in the reactor) to maintain nuclear reaction. A large amount of heat is released during a nuclear reaction. If the heat is not taken away, the reactor will be burned, so the gas (helium) flows through th...

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Problems solved by technology

[0006] The object of the present invention is to provide a metal stack internal component suitable for spherical fuel and high-temperature coolant, which can contain and position graphite components and can effectively solve the problem caused by the large difference in linear expansion coefficient between graphite components and metal materials Misalignment between graphite components and metal components

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