The trend of digital control system design for nuclear power plants in Korea

Conference · Sat Jul 01 04:00:00 EDT 2006

OSTI ID:22030136

Park, S H; Jung, H Y; Yang, C Y; Choe, I N ^[1]

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1. Korea Power Engineering Company, 360-9 Mabuk-Dong, Yongin-Si, Gyeonggi-Do, 446-713 (Korea, Republic of)

Currently there are 20 nuclear power plants (NPPs) in operation, and 6 more units are under construction in Korea. The control systems of those NPPs have also been developed together with the technology advancement. Control systems started with On-Off control using the relay logic, had been evolved into Solid-State logic using TTL ICs, and applied with the micro-processors since the Yonggwang NPP Units 3 and 4 which started its construction in 1989. Multiplexers are also installed at the local plant areas to collect field input and to send output signals while communicating with the controllers located in the system cabinets near the main control room in order to reduce the field wiring cables. The design of the digital control system technology for the NPPs in Korea has been optimized to maximize the operability as well as the safety through the design, construction, start-up and operation experiences. Both Shin-Kori Units 1 and 2 and Shin-Wolsong Units 1 and 2 NPP projects under construction are being progressed at the same time. Digital Plant Control Systems of these projects have adopted multi-loop controllers, redundant loop configuration, and soft control system for the radwaste system. Programmable Logic Controller (PLC) and Distributed Control System (DCS) are applied with soft control system in Shin-Kori Units 3 and 4. This paper describes the evolvement of control system at the NPPs in Korea and the experience and design improvement through the observation of the latest failure of the digital control system. In addition, design concept and its trend of the digital control system being applied to the NPP in Korea are introduced. (authors)

• Research Organization: American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 22030136
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
DESIGN
DIGITAL SYSTEMS
KORI-1 REACTOR
KORI-2 REACTOR
KORI-3 REACTOR
KORI-4 REACTOR
MICROPROCESSORS
NUCLEAR POWER PLANTS
RADIOACTIVE WASTES
REACTOR CONTROL SYSTEMS
REACTOR OPERATION
REACTOR SAFETY
REACTOR START-UP
REPUBLIC OF KOREA
SIGNALS
WOLSUNG-1 REACTOR
WOLSUNG-2 REACTOR
YONGGWANG-3 REACTOR
YONGGWANG-4 REACTOR