ENS 43050

v t e ENS Event
22:48 Dec 13, 2006
Title	Unit Reactor Trip Due to Grid Disturbance
Event Description	While operating at 100 % power the unit experienced an automatic Reactor trip from Reactor Protection System actuation at 17:48 on 12/13/06. At the time of the trip there was a grid disturbance followed by the unit tripping. The cause of the trip is under investigation. All plant systems functioned as designed. The unit is being maintained in Hot Shutdown conditions using applicable plant procedures. All control rods inserted fully after the reactor trip. S/G safety valves lifted and reset per design during the transient. The S/Gs are being supplied with normal feedwater and decay heat is being removed to the main condenser via the steam dump valves. The electric plant is in a normal shutdown lineup and the EDGs are available. The licensee notified the NRC Resident Inspector, PEMA, the Counties of Dauphin, Cumberland, Lancaster, York, and Lebanon.

ENS 43050 +/-
Where
Three Mile Island Pennsylvania (NRC Region 1)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
LER:	05000289/LER-2006-003
Time - Person (Reporting Time:+-1.8 h-0.075 days <br />-0.0107 weeks <br />-0.00247 months <br />)
Opened:	Stuart Brantley 21:00 Dec 13, 2006
NRC Officer:	Jeff Rotton
Last Updated:	Dec 13, 2006
43050 - NRC Website
v • d • e

v t e Emergency Notification System
Three Mile Island with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR2012-09-20T18:16:00 [Table view]
[ENS list for Three Mile Island]

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