A Method for Realizing On-line Monitoring and Diagnosis of Nuclear-level Digital Instrument and Control System

Abstract

The invention belongs to the technical field of nuclear process control system fault detection and diagnosis, and particularly relates to a method for monitoring and diagnosing a nuclear-grade digital instrument control system of a pressurized water reactor nuclear power station online. With the help of internal diagnostic information of a nuclear-grade digital instrument control system and the gateway and the open communication protocol between the nuclear-grade digital instrument control system and a non-nuclear-grade digital instrument control system, and through secondary development of software configuration and picture configuration, the operation state information of a reactor protection system is monitored in real time and online in a non-nuclear-grade digital instrument control system platform by acquiring internal diagnostic information of the nuclear-grade digital instrument control system from the gateway, and therefore, support is provided for daily inspection, preventive maintenance and operation fault diagnosis and analysis of the nuclear-grade digital instrument control system. The technical scheme of the invention specifically includes two elements, namely, diagnosis information setting and communication protocol support. The KCS system monitoring and diagnosing function implemented by the technical scheme of the invention can be well applied to the daily inspection and on-site fault handling of the system.

Description

technical field [0001] The invention belongs to the technical field of fault detection and diagnosis of a nuclear process control system, and in particular relates to a method for realizing on-line monitoring and diagnosis of a nuclear-level digital instrument control system of a pressurized water reactor nuclear power plant. Background technique [0002] The nuclear digital instrument control system (hereinafter referred to as KCS system) is an important safety system in the digital instrument control system of nuclear power plants. Facilities to prevent or mitigate damage to the core and coolant system components, protect the integrity of the three major nuclear safety barriers, avoid causing a large amount of radioactive material to escape, protect the surrounding environment of the nuclear power plant from pollution and the safety of personnel. [0003] For security and independence considerations, KCS system does not configure an engineer station. During the commission...

AI Technical Summary

Problems solved by technology

The temporary engineer station built and used during unit commissioning is not allowed to access the network of the KCS system during unit operation, and maintenance personnel cannot monitor and diagnose the operating status of the system through the fixed or temporary engineer station of the KCS system

[0007] (2) It is impossible to directly and quickly locate the hardware failure of the KCS system. The maintenance personnel need to locate the cabinet where the alarm occurs through the cabinet alarm indicator light, and then check the status of the indicator lights on each module panel on the rack to find and locate them one by one. The source of faults, the entire process of locating and alarming is inefficient and cumbersome

[0008] (3) Key information such as the clock, scan time, and program running status of the control processor of the KCS system cannot be obtained through the indicator lights on the panel of each module on the rack, and maintenance personnel cannot find software failures such as scan time overflow in time

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