SBWR Model for Steady-State and Transient Analysis

Table 10

Sequence of events of closure of main steam isolation valves.

Elapsed time (sec.)	Event
0.0	Reactor under steady-state condition rate at full power.
1.0	Closure of all main steam isolation valves.
2.0	Maximum power peak is reached (120% of rated).
2.0	The peak of pressure is maximum, and the SRVs opening to relief pressure.
2.0+	Reactor lever decreases until the emergency core cooling system actuation.
10.0+	Core flow tend to stabilize at new equilibrium conditions (natural circulation).