Research Article
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 |
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