Table 2: Main sequence of events.

EventsTime (s)
ExperimentRELAP5TRACE

Break opening000
Scram signal (13.1 MPa)823
Safety injection signal (11.7 MPa)1289
First core uncover9290136
Loop seal clearing134155173
Primary/secondary pressure reversal172175203
Second core uncovery334280253
Accumulator no. 2 and 3 injection start (4.2 MPa)345365329
Accumulator isolation no. 2 (no. 3) (1.5 MPa)948 (976)925801
Pressurizer pressure <0.7 MPa206522302167