The CANDU 300 Distributed Control System

Abstract

One of the significant design improvements in the new CANDU 300 nuclear plant design is the use of a modern microprocessor-based "Distributed Control System" (DCS). This system consists of a distributed network of local stations linked by dual-redundant data highways. The local stations are strategically located throughout the plant to reduce the amount of plant cabling and wiring. The system performs the basic device control functions previously performed by logic relays, timers and electronic analog devices, as well as the higher level control functions previously performed by a dual-redundant computer system.