18.3.7.1 Level 1: Prevention of abnormal operation and failure

Contributions of ACP100 inherent and passive safety features at this level are as follows: owing to the absence of large-diameter piping in the primary system, large- break LOCAs are eliminated; canned pump eliminates boron injection for pump sealing system.

18.3.7.2 Level 2: Control of abnormal operation and detection of failure

The ACP100 passive safety feature for this level is as follows: a large coolant inventory in the primary circuit results in a larger thermal inertia and in longer response times in the case of transients or accidents.

18.3.7.3 Level 3: Control of accidents within the design basis

ACP100’s safety systems are based on passive features obviating the need for actions related to accident management over a long period. Long-term residual heat removal systems cope with station blackout accidents, passive core cooling systems cope with loss of coolant accidents and cavity flooding during serve accidents, and passive containment of heat removal system.