本发明公开了一种氦氙冷却微型反应堆系统，所述氦氙冷却微型反应堆系统包括堆芯子系统和布雷顿循环子系统；所述堆芯子系统横向设置，且设有穿设堆芯轴心的转轴；所述布雷顿循环子系统包括透平、回热器、冷却器以及压缩机；其中，所述透平设于所述堆芯的流体出口端；所述回热器和所述冷却器与所述堆芯同轴套设，所述回热器与所述堆芯的外侧壁套接，所述冷却器与所述回热器的外侧壁套接；所述压缩机设于与所述堆芯的流体出口端相对的密闭端，所述压缩机、所述堆芯和所述透平沿所述堆芯的轴向依次排布，所述转轴串联所述压缩机、所述堆芯和所述透平。本发明的氦氙冷却微型反应堆系统集热电转换与屏蔽功能为一体，可以使反应堆系统小型化与轻量化。

This invention discloses a helium-xenon cooled micro reactor system, which comprises a core sub-system and a Brayton cycle subsystem. The core sub-system is arranged transversally and is provided with a rotating shaft through a core axis. The Brayton cycle subsystem comprises a turbine, a regenerator, a cooler and a compressor. Wherein, the turbine is arranged at the fluid outlet end of the core. The regenerator and the cooler are coaxial bushed with the core, the regenerator is connected with the outer side wall of the core, and the cooler is connected with the outer side wall of the regenerator. The compressor is arranged at a closed end relative to the fluid outlet end of the core, and the compressor, the core and the turbine are successively arranged along the axial direction of the core, and the rotating shaft is connected in series with the compressor, the core and the turbine. The helium-xenon cooled miniature reactor system of the invention integrates the thermoelectric conversion and shielding functions, and can miniaturize and lightweight the reactor system.