Safety system of nuclear power plant

The utility model provides a safety system of a nuclear power plant. The safety system comprises an upper computer, a fire alarm assembly and a hydrogen alarm assembly, wherein the fire alarm assemblycomprises a fire alarm controller and a fire detector, the fire detector is electrically connected with the fire alarm controller, and the upper computer is in ring connection with the fire alarm assembly; the hydrogen detection assembly comprises a hydrogen alarm controller and a hydrogen detector, the hydrogen detector is electrically connected with the hydrogen alarm controller, and the hydrogen alarm detector is electrically connected with the fire alarm controller. According to the embodiment of the utility model, the hydrogen alarm assembly is connected with the fire alarm assembly; according to the utility model, hydrogen alarm and fire alarm linkage can be realized, the structure is simpler, the upper computer is connected with the fire alarm assembly in a surrounding manner, communication connection can