Liquid-solid dual-fuel space nuclear reactor power supply

Abstract

The invention discloses a liquid-solid dual-fuel space nuclear reactor power supply. A reactor core comprises UC solid fuel rods, a fluoride salt coolant, a reactor core spectral shift absorber material, a reflecting layer material, a control drum and a reactor pressure vessel; the reactor core active area comprises a plurality of UC solid fuel rods, wherein coolant guide pipes are arranged in the UC solid fuel rods; a fluoride salt coolant is arranged in the coolant guide pipe, a cavity filled with helium buffer fission gas is formed in the end of the UC solid fuel rod, and the reflecting layer material and the control drum are arranged on the outer side of the reactor core active area. According to the invention, the residual reactivity, compactness and miniaturization of the reactor core are further improved while the heat of the reactor core is timely brought out, and the safety requirements of the reactor core are met in the service life operation process of the reactor core and under accident conditions.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor engineering, in particular to a liquid-solid dual-fuel space nuclear reactor power supply. Background technique [0002] At present, the design life of space probes is required to be more than 10 years, and the demand for power supply is more urgent. Solar energy cannot be used rationally in deep space exploration, and space nuclear reactor power supply (SNR), as a space power supply, has attracted widespread attention because of its incomparable advantages over traditional power supplies. The characteristics of SNR include longer life, smaller volume and quality, suitable for deep space exploration needs. In the SNR, the cooling working fluid can take out the heat from the core through the circulating flow in the core, and convert the heat into electrical energy through the thermoelectric conversion system to supply the operation of the space probe. In recent years, various SNR design c...

AI Technical Summary

Problems solved by technology

[0004] Miniaturized space reactor design generally adopts high enrichment. Considering that fluoride salt liquid fuel circulates in the entire circuit during reactor operation, if pure molten salt fuel is used, a large amount of radioactive fission products produced in the reactor will also be released with the fuel. Flowing in the entire circuit, this will cause damage to some electronic components (such as thermoelectric conversion modules); such as pure solid fuel type space stacks (such as space stacks with traditional cooling methods), although the fission products are immobilized in solid fuel, but due to the design of the coolant circuit, the fuel loading is reduced under a certain core volume

Images