Method for deterministic safety analysis in non-stationary high risk system, control method and control system using thereof

A computer-implemented method of safety evaluation of a high risk engineering process of a nuclear core loading, wherein the method comprises:

• defining safety criteria as maximum safe operation parameters, wherein said operation parameters include process parameters or forces acting upon objects involved in the process;
• comparing actual measured operation parameters with the safe operation parameters to determine risk factors, which may result in overrun of the maximum safe operation parameters;
• for each determined risk factor, defining a plurality of process stages, which are affected by the said risk factor;
• determining one or more safety intervals, wherein the safety intervals each comprise a series of consecutive process stages wherein a combination of the risk factors remains invariable;
• for each determined safety interval, creating a deterministic safety model and calculating probabilities of risk factors in the safety interval;
• and
• modifying the system based upon the calculated probabilities to reach the required safety parameter of the whole system.

A system for safety analysis of a high risk engineering process, wherein the process comprises a series of stages involving non-stationary objects characterized by at least one variable risk factor, wherein the system comprises:

• a central processor configured to perform the safety analysis;
• means for storing data;
• means for modeling the engineering process;
• means for calculating probabilistic safety parameters;
• means for analyzing risk factors distribution areas;
• means for partitioning the engineering process into a plurality of safety intervals, wherein each safety interval comprises a series of at least one process stage, for which safety conditions comprise a combination of risk factors, which remain invariable for all stages of the series.

A control system configured to control a high risk engineering process of a nuclear core loading, wherein the system comprises:

• means for detecting at least one process parameter acting upon one or more objects involved in the engineering process;
• means for storing maximum safe operations parameters;
• means for comparing the actual detected at least one process parameter with the stored maximum safe operating parameter to determine risk factors;
• means for creating a matrix of distributions of risk factors within a plurality of process stages, indicating those process stages which are affected by the risk factor, and determining one or more safety intervals, wherein each safety interval comprises a series of consecutive process stages wherein a combination of the risk factors remains invariable;
• modeling means for creating a deterministic safety model for each safety interval, and for calculating probabilities of risk factors;
• means for modifying the system based upon the calculated probabilities to reach the required safety parameter of the whole system.