Research Article
RELAP5 Analyses of ROSA/LSTF Experiments on AM Measures during PWR Vessel Bottom Small-Break LOCAs with Gas Inflow
Table 1
Major conditions of LSTF tests.
| Item | Condition | SP3 | SP4 | SP6 |
| Break size | 0.2% | HPI system | Total failure | Onset of SG depressurization and AFW injection |
10 min after safety injection signal | Action of SG depressurization | Primary depress. rate of 55 K/h | Full opening of SG RVs | Primary depress. rate of 55 K/h | Onset of 2nd SG depressurization | None | None | Pressure vessel liquid level < hot leg level | Action of 2nd SG depressurization | None | None | Full opening of SG RVs | AFW injection duration | 30 min | Continuous injection | Continuous injection (planned) |
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