Open grid type gas-cooled space nuclear reactor core

Abstract

The invention discloses an open grid type gas-cooled space nuclear reactor core, belonging to the technical field of nuclear reactors. The reactor core comprises a core activity zone, a core barrel, radial reflection layers and control rods, wherein the core activity zone is located in the core barrel and is composed of a plurality of fuel rods; the radial reflection layers are of a hollow cylindrical structure, are composed of an inner layer and an outer layer, are wrapped around the outer side of the core barrel and have the same height as the core barrel; the fuel rods and the control rodsare distributed in the core activity zone; the fuel rods and the control rods are positioned by upper and lower grid plates and winding wires wound around the jackets of the rods; the interior of eachfuel rod is composed of hollow cylindrical fuel pellets and filled with helium gas; the inner two ends of the fuel rod are provided with axial reflection blocks; and the reactor core and the reflection layers are cooled by a helium-xenon gas mixture. The reactor core of the invention can provide megawatt high-power electric energy for space tasks, and has the advantages of light weight and compact structure.

Description

technical field [0001] The invention relates to the technical field of nuclear reactors, in particular to an open-grid air-cooled space nuclear reactor core. Background technique [0002] The air-cooled space nuclear reactor is cooled by a mixed gas of helium and xenon. The high-temperature gas flowing out of the reactor can be directly connected to the Brayton cycle components, so as to achieve high thermoelectric conversion efficiency. Therefore, the air-cooled space nuclear reactor has attracted much attention in high-power space applications. . [0003] At present, the cores of air-cooled space nuclear reactors proposed mainly include pebble bed type, hexagonal prism type and refractory metal matrix type. The pebble bed core means that the fuel is made into small balls, and the coolant flows between the pebble beds to take away the fission heat energy; the hexagonal column type means that the cermet fuel is made into a hexagonal column shape, with multiple cylindrical c...

AI Technical Summary

Problems solved by technology

[0004] The above three air-cooled space nuclear reactor core designs have their own advantages, but the general disadvantage is that the weight is often too heavy, which puts forward high requirements for the launch of space nuclear reactors

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