Shielding structure of isotope battery

Abstract

The invention belongs to the technical field of radiation shielding design of radionuclide of an isotope battery, and particularly relates to a shielding structure of an isotope battery. The shieldingstructure is used for shielding a radioisotope (1) in the isotope battery, and comprises a graphene carbon-based material layer (2) coating the outer surface of the radioisotope (1), a grid (3) whichis made from a light nuclei material and used for placing the radioisotope (1), an inner shield layer (5) made from a light nuclei material, an outer shield layer (6) made from a heavy nuclei material and an outer shell (7) made from an alloy material, and the inner shield layer (5), the outer shield layer (6) and the outer shell (7) are sequentially disposed on the periphery of the grid (3). Through the shielding structure of the isotope battery, the bremsstrahlung photon intensity is reduced to 20% of that of an original design scheme, the radiation dose of workers is reduced by about 20-80%, and on the premise of no influences on other properties, the power generation efficiency of the isotope battery can be improved.

Description

technical field [0001] The invention belongs to the technical field of radionuclide radiation shielding design for isotope batteries, and in particular relates to a shielding structure for isotope batteries. Background technique [0002] Isotope batteries, also known as "radioisotope thermoelectric generators", are devices that use the decay of radioisotopes to release energy-carrying particles (this patent is for β particles) and convert their energy into electrical energy. According to the energy conversion mechanism, it can be divided into direct conversion and indirect conversion. It can be further subdivided into direct charging isotope batteries, gas ionization isotope batteries, radiation volt effect energy conversion isotope batteries, phosphor photoelectric isotope batteries, thermophotoelectric isotope batteries, thermoelectric isotope batteries, thermionic emission isotope batteries , Electromagnetic radiation energy conversion isotope battery and heat engine con...

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Problems solved by technology

[0017] The purpose of the present invention lies in the material and structural design of (decay type) β-decay isotope batteries, and proposes a shielding design scheme that can effectively reduce the exposure dose of workers and equipment, so as to solve the problem of insufficient shielding effect of current radioisotope batteries. The problem of excessive exposure and responsible damage is to ensure that the exposure dose of personnel and equipment can be reasonably low as possible, and it is the first time to apply this scheme to the design of β-decay radioisotope cells

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