37 results about "Human error probability" patented technology

The invention relates to a nuclear power station dynamic rod worth measurement on-site enforcement method. The method comprises the following steps: correcting spatial effect during a measurement process, determining local offset current, optimizing a sequence of rod worth measurement and a sequence of zero-power physics testing, and arranging an advanced reactivity meter and then inspecting the advanced reactivity meter. In the improved dynamic rod worth measurement on-site enforcement method, each group of control rod can independently measure without interference effect, rod worth is not dependent on worth of a reference rod, the reliability of measuring result is high; steps of boronation and dilution are not employed during the measurement process, the obtained maximum reactivity is dependent on reactivity of an original state, so that the enforcement method is safer; measuring operation is simple, man-made error probability is greatly reduced; the dynamic rod worth measurement on-site enforcement method can provide the control rod worth by taking position as function, and provides a reactor core design model required by more data verification security analysis; measurement efficiency is increased, the overhaul time of key paths can be greatly shortened by at least about a dozen hours in each overhaul; and movement of the control rod and discharge of radioactive waste can be reduced.

The invention relates to a display device of digital procedures human-machine interfaces in a nuclear power station, comprising a large size display screen (1), a procedure operating interface display input part (2), a state display interface display input part (3) and a display control part (4). The large size display screen (1) is used for outputting display information; the procedure operating interface display input part (2) is used for inputting the display information which is used when a procedure operating interface is displayed; the state display interface display input part (3) is used for inputting the display information which is used when a state display interface is displayed; and the display control part (4) controls the display information used when the procedure operating interface and the input state display interface are displayed not to be output and displayed on the large size display screen (1) in an overlap mode. The invention also relates to a display control method of the digital procedures human-machine interfaces in the nuclear power station. In the invention, the contents of the procedure operating interface and the state display interface are intensively displayed on the same large size display screen, the procedure operating information and the state information of a nuclear island and a conventional island can be synchronously provided, thereby the human error probability of an operator is reduced.

An optimization method and system for the number of monitoring units of a digital man-machine interface. The method comprises: conducting fuzzy segmentation on the number of monitoring units of a digital man-machine interface to be processed to establish a fuzzy optimization factor sequence; conducting segmented immune evolution on the fuzzy optimization factor sequence to extract fuzzy optimization factors, and respectively conducting computation of monitoring human error probabilities on the extracted fuzzy optimization factors; judging whether the monitoring human error probabilities trend to be stable or not, if so, terminating the evolution, and if not, returning the operation of the segmented immune evolution; and comparing the plurality of obtained monitoring human error probabilities, and selecting a fuzzy optimization factor with the minimum monitoring human error probability as a value range of the optimal number of the monitoring units. The method and system can quickly and efficiently optimize the optimal number of the monitoring units to ensure the efficiency and the quality of obtaining monitoring data by an operator, and improve the safety and reliability of a digital control system.

Disclosed are a layout method and system for monitoring units of a digital man-machine interface. The method comprises: conducting parameter coding on a plurality of monitoring units of the man-machine interface in accordance with characteristic values of the monitoring units; building an initialized group in accordance with a sequence of the monitoring units after the parameter coding; conducting group evaluation on the basis of an error probability calculation method of Bayesian network objective functions to obtain monitoring human error probabilities corresponding to the group; judging whether the monitoring human error probabilities obtained by the group evaluation trend to be stable, if not, using a genetic hybrid algorithm to rebuild a new group which represents the sequence of evolved monitoring units, and if yes, terminating the evolution process; and comparing the monitoring human error probabilities corresponding to a plurality of groups obtained by multiple group evaluations, and selecting a group with the minimum monitoring human error probability as an optimal sequence of the monitoring units of the man-machine interface, thereby obtaining an optimal layout of the monitoring units of the man-machine interface.

A human error mechanism modeling method considering path dependence comprises the following steps that 1, human-computer interaction tasks are analyzed, and bottom layer operation types and specific cognitive functions called by the bottom layer operation types are clarified, including basic task analysis, cognitive behavior analysis and human error mode analysis; 2, defining an abnormal information mode, and judging the correlation between the abnormal information mode and a human error mode caused by cognitive confusion; 3, determining basic cognitive resource requirements of each task; 4, evaluating six stable performance forming factors, namely the PSFs level; 5, performing correlation adjustment on the human error probability after PSFs adjustment according to cognitive overload and cognitive confusion so as to obtain a human error probability considering path dependence; Through the above steps, a human error mechanism model is provided, the correlation between human errors and other abnormal events in the same human-computer interaction evolution path is established, and on the basis, the problem of influence of path dependence on the human error probability is solved.

Disclosed is a method for judging the reliability of DCS man-machine interfaces through an HRA, comprising: using a plurality of man-machine interfaces in an associated digital control room during the processing of an accident as a plurality of nodes, connecting the plurality of nodes in sequence in accordance with the sequence of monitoring or operating the plurality of man-machine interfaces, and establishing a work-team response tree; using a human error type generated by monitoring or operating the nodes as a top node, using a human error mode as a middle-layer node, and using an error source of an action of personnel monitoring or operation as a bottom-layer node to establish a fault tree of a human error of the nodes; determining factors that influence the bottom-layer node and an influence probability of each factor, and computing the probability of the human error; and judging the reliability of the man-machine interfaces in accordance with an error probability value obtained by computing in step S3. The present invention systematically describes the relationship between the man-machine interface and the human error, can recognize the man-machine interface with a larger human error probability, and provides a basis for improving the man-machine interfaces of a digital master control room in a complex industrial system.