ENS 43050
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ENS Event | |
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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. |
Where | |
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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
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | A/R |
Before | Power Operation (100 %) |
After | Hot Shutdown (0 %) |
WEEKMONTHYEARENS 483252012-09-20T18:16:00020 September 2012 18:16:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Trip Due to Reactor Protection System Actuation ENS 482212012-08-22T12:01:00022 August 2012 12:01:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip Due to High Reactor Coolant System Pressure ENS 430502006-12-13T22:48:00013 December 2006 22:48:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Unit Reactor Trip Due to Grid Disturbance ENS 429572006-11-02T18:34:0002 November 2006 18:34:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Turbine Trip/ Reactor Trip Due to Invalid Low Condenser Vacuum Signal 2012-09-20T18:16:00 | |
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