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

Table 6

Control logic of Test 1 [10].

Event	Condition
Close of PZR spray line valves and PZR heaters	30 minutes before break
Isolation of PZR by closing surge line valve	1 minute before break
Break opening	Time zero
Generation of scram signal	4 seconds
Initiation of primary coolant pump coastdown
Initiation of core power decay simulation
Turbine trip (closure of stop valve)	Generation of scram signal
Closure of main steam isolation valve
Termination of main feedwater
Opening and closing of the SG relief valves	SG pressures 110% and 103%
Initiation of accumulator system	Primary pressure below 29% of initial value
Initiation of low-pressure injection system	LP pressure below 8% of initial value