ENS 44268: Difference between revisions
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| event date = 06/04/2008 17:30 EDT | | event date = 06/04/2008 17:30 EDT | ||
| last update date = 06/04/2008 | | last update date = 06/04/2008 | ||
| title = Manual Reactor Trip Following Loss | | title = Manual Reactor Trip Following Loss of Main Feedwater Pump | ||
| event text = On 6/4/2008 at 17:30 hrs an unplanned manual reactor trip was initiated on St. Lucie Unit 2 from 100% power due to a trip of the 2B Heater Drain pump leading to a trip of the 2A Main Feedwater Pump and decreasing S/G levels. The Reactor was manually tripped due to decreasing Steam Generator levels. | | event text = On 6/4/2008 at 17:30 hrs an unplanned manual reactor trip was initiated on St. Lucie Unit 2 from 100% power due to a trip of the 2B Heater Drain pump leading to a trip of the 2A Main Feedwater Pump and decreasing S/G levels. The Reactor was manually tripped due to decreasing Steam Generator levels. | ||
Following the reactor trip, EOP-1, Standard Post Trip Actions, and EOP-2, Reactor Trip Recovery procedures were completed and Unit 2 was stabilized in Mode 3. All control rods fully inserted. The S/G Safety Valves lifted and the last valve reseated at 950 psig. Feedwater to the S/G was supplied by the 2B Main FW Pumps and then the Auxiliary Feedwater Pumps. Unit 2 electrical requirements are provided from offsite power. All safe shutdown equipment operated as expected. There were no major equipment failures. Unit 1 was not affected by this event. The Grid is stable. | Following the reactor trip, EOP-1, Standard Post Trip Actions, and EOP-2, Reactor Trip Recovery procedures were completed and Unit 2 was stabilized in Mode 3. All control rods fully inserted. The S/G Safety Valves lifted and the last valve reseated at 950 psig. Feedwater to the S/G was supplied by the 2B Main FW Pumps and then the Auxiliary Feedwater Pumps. Unit 2 electrical requirements are provided from offsite power. All safe shutdown equipment operated as expected. There were no major equipment failures. Unit 1 was not affected by this event. The Grid is stable. | ||
Latest revision as of 22:14, 1 March 2018
| Where | |
|---|---|
Saint Lucie  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
| Time - Person (Reporting Time:+-0.33 h-0.0138 days <br />-0.00196 weeks <br />-4.52034e-4 months <br />) | |
| Opened: | Calvin Ward 21:10 Jun 4, 2008 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Jun 4, 2008 |
| 44268 - NRC Website
| |