Study on the Coordination Design of Cyber Security and the Safety of the Digitalized Reactor Protection System
This paper studies the coordinated design of information security and the functional safety for the digitalized reactor protection system(RPS)of nuclear power plant.Firstly,digitalized RPS attack tree modeling is carried out to qualitatively and quantitatively analyze digitalized RPS information security threats,and a quantitative evaluation method for the impact of information security threats on digitalized RPS reliability is proposed.Then,considering the coordination requirements of information security and functional safety comprehensively,the coordination design principles are expounded from the two levels of the overall structure design and the single subsystem design,and the coordination design methods and safety protection measures of digitalized RPS information security and functional safety are proposed,so as to reduce the impact of information security threats on the reliability of digitalized RPS to an acceptable level.The case of study of this article can be used to guide the design of the digitalized RPS.
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