Review Article
Insights on Accident Information and System Operations during Fukushima Events
Table 3
Records related to manual trip of HPCI in Unit 3.
| Date | Time | Event |
| March 11 | 4:04 pm | RCIC manual start (operator confirmed low reactor water level) |
| March 12 | 11:36 am | RCIC trip. Unable to restart | 12:35 pm | HPCI autostart Operators pay attention to reactor level, HPCI flow | 8:36 pm | Depletion of battery. Loss of reactor level indicator |
| March 13 | 2:42 am | HPCI outlet pressure close to reactor pressure (0.8-0.9 MPa) Plan to depressurize reactor using SRV (to 0.61 MPa) HPCI manual trip | 2:45 am | Failure in SRV remote open (possibility that battery power low) | 5:00 am | Reactor pressure = 7.38 MPa | 7:00 am | Car batteries connected to SRV | 8:41 am | Venting line-up (except rupture disk) complete |
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