Method and system for judging reliability of man-machine interfaces of DCS (digital control system) by means of HRA (human reliability analysis)

Abstract

The invention discloses a method for judging the reliability of man-machine interfaces of a DCS (digital control system) by means of HRA (human reliability analysis). The method includes utilizing a plurality of correlated man-machine interfaces in a digital control room as a plurality of nodes when an accident is processed, sequentially connecting the nodes to one another according to a sequence for monitoring or operating the man-machine interfaces and creating a crew response tree; utilizing the type of human factor failures generated when the nodes are monitored or operated as a top node, utilizing human factor failure modes as middle-layer nodes, utilizing monitoring or operating action failure sources of staff members as bottom-layer nodes and creating a human factor failure tree of the nodes; determining factors affecting the bottom-layer nodes and the effect probability of each factor, and computing human factor failure probabilities; and judging the reliability of the man-machine interfaces according to failure probability values computed in the step S3. The invention further discloses a system which is capable of describing a relation among the man-machine interfaces and human factor failures. The method and the system have the advantages that the man-machine interfaces with the large human factor failure probabilities can be identified, and a foundation is laid for improving man-machine interfaces of digital main control rooms of complicated industrial systems.

Description

technical field [0001] The present invention relates to the field of digital control of power plants, in particular to the field of digital control of nuclear power plants, in particular, to a method for judging the reliability of a DCS (digital control system, digital control system) man-machine interface through HRA (human factor reliability analysis) method and system. Background technique [0002] In recent years, the safety evaluation of large-scale and complex industrial systems has increasingly considered the behavior and activities of people in the system. Human-system interaction is considered an important contributor to the safe operation of complex industrial systems. However, due to the numerous human behaviors and human-machine interfaces in complex industrial systems, how to consider and calculate the impact of human-machine interfaces in complex industrial systems on system security is a difficult point. [0003] The main personnel behavior of complex indust...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for judging the reliability of the DCS man-machine interface through HRA, which can significantly save a large amount of industrial safety costs, so as to solve the ...

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