Abstract:Reactor Trip Breaker (RTB) is the core component of the switching device for reactor shutdown in nuclear power plant, and is the final implementation of the organization to stop the reactor for the reactor protection system, whose safety and reliability is very important for the safe operation of nuclear power plant. According to the common method of the equipment identification for RTB, and combined with the actual situation, this paper proposes some discussion for understanding identification standards and using identification methods related to RTB equipment.