Research Article
Remarks on Consistent Development of Plant Nodalizations: An Example of Application to the ROSA Integral Test Facility
Table 8
Control logic of Test 2 [
13].
| Event | Condition |
| Break | Time zero | Generation of scram signal | Primary pressure 84% of initial value | PZR heater off | Generation of scram signal or PZR liquid level below 2.3 m | Initiation of core power decay curve simulation | | Initiation of primary coolant pump coastdown | | Turbine trip (closure of stop valve) | Generation of scram signal | Closure of main steam isolation valve | | Termination of main feedwater | | Generation of SI signal | Primary pressure below 79% of initial value | Initiation of HPIS in the loop with PZR only | 12 s after SI signal | Initiation of accumulator system | Primary pressure below 29% of initial value | Initiation of low-pressure injection system | LP pressure below 8% of initial value | Opening and closing of the SG relief valves | SG pressures 110%/103% |
|
|