Research on Forward Design Process of Network Security Protection Design for Instrument and Control System in Nuclear Power Plant

Abstract

Network security protection design for instrument and control (I&C) system in nuclear power plant is an important measure to ensure safe and stable operation of instrument and control system in nuclear power plant. Relevant national departments have put forward a number of regulatory requirements for network security design of instrument and control system, including the general principles of safety protection of power monitoring system proposed by Energy Bureau, Guidelines for grading of classified protection of cyber security by Ministry of Public Security and the technical policy requirements of network security of nuclear power plant proposed by China Nuclear and Radiation Safety Center. How to coordinate network security protection measures to meet multiple regulatory requirements is an important issue in the design of nuclear power plant network security protection. This paper introduces a forward design process of network security that coordinates and considers the above regulatory requirements, and analyzes and explains the design elements and reference standard for the design process, such as zoning and domain design, grading of classified protection, and critical digital asset classification protection.