Advanced Presentation of BETHSY 6.2TC Test Results Calculated by RELAP5 and TRACE

Table 2

Main sequence of events.

Events	Time (s)
	Experiment	RELAP5	TRACE
Break opening	0	0	0
Scram signal (13.1 MPa)	8	2	3
Safety injection signal (11.7 MPa)	12	8	9
First core uncover	92	90	136
Loop seal clearing	134	155	173
Primary/secondary pressure reversal	172	175	203
Second core uncovery	334	280	253
Accumulator no. 2 and 3 injection start (4.2 MPa)	345	365	329
Accumulator isolation no. 2 (no. 3) (1.5 MPa)	948 (976)	925	801
Pressurizer pressure <0.7 MPa	2065	2230	2167