Abstract
The Advanced CANDU Reactor^<TM> (ACR^<TM>) is a Generation III+ pressure tube type reactor using light water coolant and heavy water moderator. The ACR-1000 reactor design is an evolutionary extension of the proven CANDU reactor design. The ACR-1000 utilizes natural circulation and other passive systems and features for accident mitigation. Natural circulation features may be relied upon to remove heat from the primary coolant when forced circulation is not available, from the lowpressure moderator, and to circulate the atmosphere inside the containment. This paper describes how the use of passive features, including natural circulation, complement and supplement active features, enhancing reliability and improving safety margins.
