Method and system for handling faults of signal failures of DCS (Distributed Control System) safety injection system of nuclear power plant

Abstract

The invention discloses a method and a system for handling faults of signal failures of a DCS safety injection system of a nuclear power plant, wherein the method comprises the following steps of: conforming a safety injection signal command for the failure of the safety injection system; according to the confirmed safety injection signal command, acquiring the topological structure chart of a digitalized instrument control system for implementing the safety injection signal; determining hardware equipment associated with the safety injection signal command according to the topological structure chart; and handling faults of the hardware equipment. According to the method disclosed by the invention, various different approaches and modes of the faults of the system equipment can be judged and then the proper prevention measures can be determined, so that the occurrence frequency of the faults is reduced and the consequences of the faults can be reduced; and the important upstream input is provided to the follow-up further establishment of models, the development of reliability analysis and the calculation of availability rate and the like.

Description

technical field [0001] The invention relates to the field of digital instrument control systems of nuclear power plants, in particular to a fault handling method and system for signal failure of a DCS safety injection system of a nuclear power plant. Background technique [0002] From the proposal in the 1970s to use a method and means to digitally evaluate nuclear power plants and general industrial facilities to determine their safety, to gradually introduce the probabilistic safety assessment PSA (Probabilistic Safety Assessment) to analyze the reliability of in-service nuclear power plants, at present This evaluation method is gradually extended to the design stage of nuclear power plants, in order to understand the safety hazards of nuclear power plants at the beginning of design and improve or eliminate them. FMEA: Failure Mode and Effect Analysis (FMEA) is a key link in the reliability analysis work, and its technical solutions implemented in specific engineering appl...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fault processing method for the signal failure of the DCS safety injection system in a nuclear power plant and to address the defect that the existing technology does not form a fault analysis and processing method for the signal failure of the safety injection system in the digital instrument control system. system

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