A major safety advantage of passive plants is that long-term accident mitigation is maintained without operator action or reliance on off-site or on-site ac power. The AP1000® uses extensively analyzed and tested passive systems to improve the safety of the plant. The Advisory Council on Reactor Safeguards and the U.S. NRC have scrutinized these systems and ruled that they meet all the required criteria.

The AP1000 passive safety systems include:

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