CONTROL LOOP FOR MAIN FEEDWATER CONTROL VALVE LOOP HAVING FAULT DETECTION AND FAULT TOLERANCE FUNCTIONS

摘要

The present invention relates to a main water supply control valve control loop having a failure detection function and a failure control function of a steam generator water level control facility of a nuclear power plant.;In the present invention, when a failure occurs in the control loop of the main water supply control valve during normal operation, a failure alarm is generated and the main water supply control valve is automatically switched to the emergency operation control mode to overcome the failure state and the main water supply control valve is normally operated. By controlling it to the same condition as the operating state, it is possible to prevent the power plant uninterrupted due to the malfunction of steam generator water level control function. Also, in the conventional main water supply control valve control loop, even if a failure occurs in the control loop component, maintenance and maintenance during operation Although not at all possible, the reliability of the main water supply control valve control loop can be maintained by quickly analyzing the cause of failure of the main water supply control valve control loop component during operation according to the application of the present invention. And soundness can be secured at all times.