Passive Safety Features in the ACR-1000

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Steven Ford
Boris Lekakh
Ken Hau

Abstract

The Advanced CANDU Reactor (ACR) 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. ACR utilizes passive, stored-energy, natural circulation, and gravity features for: Reactor shutdown, Cooling of the heat transport system when forced circulation is unavailable, Core refill and fuel cooling following a LOCA, Post-accident pressure and temperature suppression inside containment, Emergency feedwater supply to the steam generators, and Mitigation of postulated beyond design basis accidents. This paper describes passive design elements and how they complement the active features, enhance reliability and improve the overall safety margins.

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