ENS 40664: Difference between revisions
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| event date = 04/10/2004 11:50 PDT | | event date = 04/10/2004 11:50 PDT | ||
| last update date = 04/10/2004 | | last update date = 04/10/2004 | ||
| title = Manual Reactor Trip Due | | title = Manual Reactor Trip Due to Loss of Both Main Feedwater Pumps | ||
| event text = San Onofre Unit 2 was manually tripped from 97% power due to the loss of feed water pumps. After both feedwater pumps tripped, the operators manually tripped the reactor. Both trains of the emergency feed water system actuated as expected due to the initial power level. The plant is stable at NOP/NOT. The cause of the feed water pump trips is being evaluated. All control rods fully inserted and all safety systems worked properly. The steam generators are discharging steam to the main condenser using the turbine bypass valves. AFW pumps are running to maintain steam generator water levels. | | event text = San Onofre Unit 2 was manually tripped from 97% power due to the loss of feed water pumps. After both feedwater pumps tripped, the operators manually tripped the reactor. Both trains of the emergency feed water system actuated as expected due to the initial power level. The plant is stable at NOP/NOT. The cause of the feed water pump trips is being evaluated. All control rods fully inserted and all safety systems worked properly. The steam generators are discharging steam to the main condenser using the turbine bypass valves. AFW pumps are running to maintain steam generator water levels. | ||
The Licensee notified the NRC Resident Inspector. | The Licensee notified the NRC Resident Inspector. | ||
Latest revision as of 22:23, 1 March 2018
| Where | |
|---|---|
San Onofre  California (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+-1.93 h-0.0804 days <br />-0.0115 weeks <br />-0.00264 months <br />) | |
| Opened: | Joel Barnett 16:54 Apr 10, 2004 |
| NRC Officer: | Bill Gott |
| Last Updated: | Apr 10, 2004 |
| 40664 - NRC Website
| |
San Onofre with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |