METHOD FOR DETERMINISTIC SAFETY ANALYSIS IN NON-STATIONARY HIGH RISK SYSTEM, CONTROL METHOD AND CONTROL SYSTEM USING THEREOF

摘要

This invention relates to a method and systems of safety analysis of engineering processes and may be used for safety analysis of nuclear power stations.;According to the invention, distribution of risk factors is analysed on different stages of the engineering process, and safety intervals are determined where safety conditions remain invariable. The method further includes analysis of failures transitions from one safety interval into another by means of cause-effect analysis. Based on the results of this analysis, deterministic safety models are created for possible scenarios of transition of failures from one safety interval into another.;A method and system according to the invention provide quantitative safety analysis and evaluation for engineering processes in variable safety conditions and enable creating valid safety requirements to perform optimisation of an engineering processes control system.

主权项

1. A computer-implemented method of safety control of a high risk engineering process, wherein the process comprises a series of stages involving one or more non-stationary objects characterized by at least one variable risk factor, wherein the method comprises:
dividing, via a computer, the high risk engineering process into a plurality of safety intervals, such that each safety interval comprises a series of process stages and each process stage of the series of process stages is characterized by a combination of risk factors, wherein the combination remains invariable for each process stage of the series of process stages; determining a sequential transition of failures of the engineering process and operation parameters from one safety interval to another, the sequential transition of failures being analyzed using cause-effect analysis; for each safety interval, constructing, via the computer, at least one deterministic safety model based on results of an analysis of possible scenarios of sequential transitions of engineering process failures from one safety interval to another safety interval; for each safety interval, performing, via the computer, qualitative and quantitative safety analysis; and correspondingly modifying the engineering process to reach the required safety parameters.