A method and system for verifying the default value of a digital instrument and control system signal in a nuclear power plant

Abstract

The invention discloses a method and system for verifying the default value of a digital instrument control system signal of a nuclear power plant, wherein the method includes the following steps: receiving the signal of the digital instrument control system; judging whether the signal of the digital instrument control system is valid; The signal of the control system is replaced by the preset default value; the default value of the digital instrument control system signal is verified; the relevant data in the verification process is recorded. The invention verifies the default value of the signal of the digital instrument control system of the nuclear power plant, and records the relevant data in the simulation verification process, so as to analyze the verification situation of the default value according to the records, continuously improve the setting of the default value, and improve the safety of the nuclear power plant and usability.

Description

technical field [0001] The invention relates to a digital instrument control system of a nuclear power plant, in particular to a method and system for verifying a signal default value of the digital instrument control system of a nuclear power plant. Background technique [0002] As a mature control technology, DCS (Digital Control System) has been applied in nuclear power plants. Compared with the control logic built by operational amplifiers and relays in traditional nuclear power plant instrumentation and control systems, DCS greatly increases the reliability of power plant control. The problem of default value must be considered in DCS design. The default value refers to the substitute value adopted by the DCS for the failure signal after the DCS determines that the signal is invalid. Using the default value can reduce the impact of the DCS signal failure on the safety and availability of the nuclear power plant. The choice of default value is directly related to the s...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a relatively complete method and system for verifying the default value of the digital instrument and control system signal of a nuclear power plant in view of the defect that there is no method for verifying the default value of the signal of the digital instrument and control system in the prior art

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