Verification and Validation of Fault Default Values for Digital Instrument and Control System in Nuclear Power Plant
The setting of default values for faults in safety level digital instrument and control system is crucial for the safety of nuclear power plants,but the difficulty in its verification and confirmation lies in the lack of clear guidelines for implementation.Based on IEEE Std 1012,combined with the analysis of regulatory standards,default value design principles,and past project implementation experience,and taking into account the characteristics of the digital instru-ment and control system platform and design development process of the Zhangzhou Nuclear Power Phase I project,a set of verification and confirmation strategies and methods for safety level digital instrument and control system fault default values is proposed.After the practical verification of the first phase of Zhangzhou Nuclear Power Plant,this strategy and method can fully and efficiently verify the correctness and completeness of the default value design,effectively alleviating the dilemma of lacking detailed standards,theories,and relevant mature experiences to refer to in the verification and confirmation process.This strategy and method have certain reference value for the verification and confirmation of default values of digital instrument and control system for nuclear power safety in the future.
DCSsecurity levelfault default valueverification and validationnuclear power plant
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