Modularized kilowatt-level strontium-90 isotope heat source device

The invention is applicable to the technical field of isotope heat sources, and provides a modular kilowatt-level strontium-90 isotope heat source device, comprising: a heat source module, the heat source module comprising a fuel pellet and a sealing layer wrapping the surface of the fuel pellet, the fuel pellet being ceramic strontium fluoride; and the heat collection body is provided with a containing cavity, the six heat source modules are stacked in the containing cavity, and the heat collection body is made of uranium-molybdenum alloy. According to the invention, the ceramic strontium fluoride is used as the fuel pellet, and the surface of the ceramic strontium fluoride is coated with the sealing layer, so that the radiation dose of strontium-90 can be effectively controlled; the heat collecting body is made of a uranium-molybdenum alloy material, radiation generated by decay of strontium-90 can be shielded, the radiation dosage in the using process is reduced, kilowatt-level power output can be achieved