NUCLEAR POWER PLANT REACTOR PROTECTION SYSTEM AND SAFETY CONTROL METHOD THEREIN

摘要

A nuclear power plant reactor protection system (100) and a safety control method therein. The protection system (100) comprises: an emergency shutdown system (10) divided into N protection channels, each protection channel obtaining protection parameters from a signal preprocessing system (11) to carry out threshold comparison; a special driving system (20) connected to the N protection channels, receiving a threshold comparison result, performing special driving logic processing according to the threshold comparison result, and outputting a first special driving instruction for driving an actuator that needs to be operated before a reactor reaches a controllable state and after a design reference accident of a nuclear power plant takes place; and an automatic safety system (30) connected to the special driving system (20) by means of a safety-level ring network (40), and generating a first device-level control instruction for controlling the actuator that needs to be operated when the reactor is converted from the controllable state to a safe shutdown state and after the design reference accident of the nuclear power plant takes place. The system and method can reduce the complexity of the maintenance and regular testing scheme for the protection system.