Remarks on Consistent Development of Plant Nodalizations: An Example of Application to the ROSA Integral Test Facility

Table 9

Chronology of the main events in Test 2 [13].

Event	Exp.	TRACE
Onset of break	0	0
Scram signal	5	6
SI signal	7	9
Turbine trip and MSIVs closed	10	9
Primary pumps trip	11	6
Termination of SG FW	13	6
SG relief valves open	≈27–57	≈25–55
Initiation of core power decay	29	24
Initiation of HPSI	≈35	21
Loop seal clearing	≈40	≈60
Primary pressure lower than SG pressure	≈55	74
Initiation of Acc system	≈110	126
Core protection activated	≈140	—
Max. PCT	≈150	141
Whole core was quenched	≈180	212
Primary coolant pumps stopped	260	256
Termination of Acc injection	≈280	≈285
Initiation of LPSI	≈290	—
End of test	1212	500