Sequence of small break loss of coolant accident.
|0 s||Small break (10 mm diameter) on DVI line B|
|188 s||Low PRZ level leads to CMTs injection, PPHX actuation and coolant pumps stop|
|190 s||Reactor scram triggered by pumps low speed (90%)|
|193 s||Low PRZ pressure actuates reactor protection signal which triggers secondary lines isolation|
|194 s||Emergency condensers are connected to SGs|
|5 min||Apparition of a vapour phase in vessel upper head. Bulk boiling occurs in the reactor vessel|
|25 min||Flashing of water into steam in the CMTs|
|47 min||Low CMT levels actuate ADS opening|
|58 min||ADS final stage opening|
|59 min||Break flow turns into vapour phase. Beginning of accumulators injection (finished 100 s later)|
|1 h 4 min||Beginning of safety tanks injection|
|2 h 47 min||End of simulation|
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