Sequence of large break loss of coolant accident (LOCA).
|0 s||Double-ended guillotine break of cold leg A|
|0.1 s||Chain reaction is stopped by lack of moderation|
|3 s||Low PRZ pressure causes a reactor protection signal|
|3.15 s||Steam line and feedwater line isolation|
|4 s||Reactor scram|
|4.5 s||Reactor vessel has lost all coolant|
|5 s||Opening of CMT injection valves|
|5.5 s||Accumulators injection starts|
|6 s||Coolant pumps stop on their inertia|
|9 s||Passive primary cooling actuation|
|9.5 s||Emergency condensers (ECs) are connected to steam generators (SGs)|
|45 s||Maximum clad surface temperature reached (725 °C)|
|77 s||End of accumulators injection|
|98 s||CMTs injection starts|
|13 min||CMTs low level causes opening of the ADS 1st stage|
|15 min||Opening of the ADS 2nd stage|
|16 min||Core is flooded again by primary coolant|
|43 min||Opening of the ADS final stage|
|90 min||End of simulation|
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