Modeling method for reliability of reactor-shutdown protecting signal in DCS (digitizer control system) and system

Abstract

The invention discloses a modeling method for reliability of a reactor-shutdown protecting signal in a DCS (digitizer control system) and a system, wherein the method mainly comprises the following steps of: determining a triggering signal of the reactor-shutdown protecting signal in a nuclear power station; acquiring a topological structure chart of the DCS of the triggering signal according to the actuating logic of the triggering signal; determining equipment causing the triggering signal in the DCS according to the topological structure chart and carrying out analysis on the mode and the influence of faults; establishing a fault tree model according to the analysis result of the mode and the influence of faults and a fault tree method, wherein a top event of the fault tree model is failure of the reactor-shutdown protecting signal due to the determined triggering signal; and calculating the reliability of the reactor-shutdown signal according to the fault tree model. In the invention, the reliability of the reactor-shutdown protecting signal in the DCS can be effectively calculated and the quantitative basis is provided for the design of the total scheme.

Description

technical field [0001] The invention relates to the field of digital instrumentation and control of nuclear power plants, in particular to a reliability modeling method and system for a DCS reactor shutdown protection signal of a nuclear power plant. Background technique [0002] The digital control system (DCS) of nuclear power plants is the "nerve center" of nuclear power plants. It provides more advanced control and management means, and is an important equipment to ensure the safe and reliable operation of nuclear power plants. From design to manufacture, the system needs to meet the requirements of reliability, safety and economy. The digital instrument control system of nuclear power plants integrates multiple technologies such as computer, communication, display and control. How to analyze the reliability of the system and equipment is directly related to the operation of the power plant and affects the safety of the power plant. Therefore, it is necessary to conduct ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of reliability of the reactor shutdown protection signal in the digital instrument and control system of nuclear power plants in view of the lack of reliability calculation of the reactor shutdown protection signal in the digital instrument and control system of the nuclear power plant in the design stage in the prior art Modeling method and system

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