DYNAMIC SAFETY SYSTEM IN A PROGRAMMABLE LOGIC CONTROLLER FOR PRESSURIZED WATER REACTOR

摘要

PURPOSE: Provided is a safety system for protecting a pressurized water reactor from danger capable of enhancing the safety and the economic efficiency of a nuclear power station by employing a digital dynamic safety system. CONSTITUTION: The dynamic safety system for protecting a pressurized water reactor from danger comprises a plurality of first multiplexers for sampling plant signals; a plurality of AD converter for transforming an analogue signal into a digital signal; the first process system(10) having a plurality of trip for judging whether a nuclear reactor must be stopped or not by using the sampled plant signal; a plurality of second multiplexers; a plurality of voting for performing a voting logic; a plurality of pattern recognition logic for outputting a stop signal of the nuclear reactor; a plurality of DC converter for transforming a pulse generated from the pattern recognition logic into a DC; the second process system(20) having a final voting logic; a device for stopping the nuclear reactor; and a test signal generator.