ENS 40570: Difference between revisions
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| event date = 03/06/2004 00:50 EST | | event date = 03/06/2004 00:50 EST | ||
| last update date = 03/06/2004 | | last update date = 03/06/2004 | ||
| title = Manual Reactor Trip | | title = Manual Reactor Trip at Millstone 2 Due to Spurious Trip of the "B" Feed Pump | ||
| event text = The licensee reported that the "B" Steam Generator Feed Pump tripped unexpectedly and would not reset causing lowering steam generator water levels. Operators manually tripped the reactor and all control rods properly inserted. The auxiliary feed water (AFW) system automatically initiated to restore steam generator water levels. The lowest steam generator water level observed during the event was 55% level as opposed to the normal level of 70%. No primary relief valves lifted. Operators established decay heat removal capability using AFW system and the atmospheric steam dump valves. The licensee initiated a post trip review to determine the cause of the feed pump trip. | | event text = The licensee reported that the "B" Steam Generator Feed Pump tripped unexpectedly and would not reset causing lowering steam generator water levels. Operators manually tripped the reactor and all control rods properly inserted. The auxiliary feed water (AFW) system automatically initiated to restore steam generator water levels. The lowest steam generator water level observed during the event was 55% level as opposed to the normal level of 70%. No primary relief valves lifted. Operators established decay heat removal capability using AFW system and the atmospheric steam dump valves. The licensee initiated a post trip review to determine the cause of the feed pump trip. | ||
The NRC Resident inspector has been notified by the licensee. | The NRC Resident inspector has been notified by the licensee. |
Latest revision as of 21:24, 1 March 2018
Where | |
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Millstone Connecticut (NRC Region 1) | |
Reporting | |
10 CFR 50.72(b)(2)(iv)(B), RPS Actuation 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
LER: | 05000336/LER-2004-001 |
Time - Person (Reporting Time:+-3.8 h-0.158 days <br />-0.0226 weeks <br />-0.00521 months <br />) | |
Opened: | Janet Novak 02:02 Mar 6, 2004 |
NRC Officer: | Rich Laura |
Last Updated: | Mar 6, 2004 |
40570 - NRC Website
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