A Study of Instrumentation and Control System for Design Extended Conditions

As the third level of nuclear power plant instrumentation and control (I&C) system defense level, nuclear power plant (NPP) design extended conditions I&C system is gradually attracting the attention of the National Nuclear Safety Administration and design department, and the function analysis and design process of this system is also becoming mature. This article takes the research of the extended conditions I&C system of a new mode pressurized water reactor as an example to show the detailed and complete design process of this system, including the safety function analysis of the process system, the function combing and allocation of the I&C system, the analysis of the limiting conditions, the design of the system structure, and the proposed design requirements. Through this study, the standard design process of extended conditions I&C system for NPP design is finally refined, which is also applicable to other I&C subsystems, providing strong support for ensuring the design integrity of the NPP I&C system.