The strategy for advanced I and C system (I3CS) development

All of the nuclear power plants in Korea are operating with analog instrumentation and control (I and C) equipment that are increasingly faced with frequent troubles, obsolescence and high maintenance expense. Electrical and computer technology has improved rapidly in recent years and has been applied to other industries. So it is strongly recommended we adopt modern digital and computer technology to improve plant safety and availability. We established the plan for the development of advanced I and C technology and equipment to solve the above problems. This plan is aimed at replacement of the I and C systems for the existing plants, and at planned as well as next generation nuclear power plants. It is divided into three major parts as follows: Plan for domestic design of I and C systems and components; plan for domestic manufacturing of I and C equipment; plan for development of future technologies. According to the above strategy, the advanced I and C system, namely, I3 CS(Integrated Intelligent Instrumentation and Control System) will be developed for after next generation NPPs. I3 CS Consist of three major parts, the advanced compact workstation, distributed digital control and protection system, and the computer-based alarm processing and operator support system, namely, DREAMS (Diagnosis, Response, and operator Aid Management System). The first stage for DREAMS is to develop DAS (Dynamic Alarm System) which reduces the nuisance alarm based on operating mode, direct precursor, and dynamic prioritization. (author). 6 refs, 2 figs