ENS 45474: Difference between revisions

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| event date = 11/02/2009 22:41 EDT
| event date = 11/02/2009 22:41 EDT
| last update date = 11/03/2009
| last update date = 11/03/2009
| title = Reactor Trip Due To Turbine Trip Caused By A Generator Lock-Out Relay Actuation
| title = Reactor Trip Due to Turbine Trip Caused by a Generator Lock-Out Relay Actuation
| event text = At 2242 on November 2, 2009 Indian Point Unit 2 reactor tripped from 100% due to a turbine trip.  The turbine tripped due to a generator lockout relay actuation.  The investigation into the relay actuation is ongoing.  All systems responded as expected.  Auxiliary feed water is providing steam generator feed and levels are being maintained.  No steam safeties opened and no coolant system relief or safety valves actuated.  The reactor plant is in mode 3 and stable.  Unit 3 was unaffected and remains at 100%.
| event text = At 2242 on November 2, 2009 Indian Point Unit 2 reactor tripped from 100% due to a turbine trip.  The turbine tripped due to a generator lockout relay actuation.  The investigation into the relay actuation is ongoing.  All systems responded as expected.  Auxiliary feed water is providing steam generator feed and levels are being maintained.  No steam safeties opened and no coolant system relief or safety valves actuated.  The reactor plant is in mode 3 and stable.  Unit 3 was unaffected and remains at 100%.
The trip was characterized as uncomplicated.  All rods fully inserted and stabilized at the normal mode 3 no-load Tave and pressure.  The shutdown electrical lineup is normal and the unit was not in any significant LCOs at the time of the trip.  The licensee stated that they were not performing any maintenance or surveillances at the time of the trip.  Initial investigation has not revealed any obvious generator electrical system issues but a detailed investigation is ongoing.
The trip was characterized as uncomplicated.  All rods fully inserted and stabilized at the normal mode 3 no-load Tave and pressure.  The shutdown electrical lineup is normal and the unit was not in any significant LCOs at the time of the trip.  The licensee stated that they were not performing any maintenance or surveillances at the time of the trip.  Initial investigation has not revealed any obvious generator electrical system issues but a detailed investigation is ongoing.

Latest revision as of 22:10, 1 March 2018

ENS 45474 +/-
Where
Indian Point Entergy icon.png
New York (NRC Region 1)
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:+-2.77 h-0.115 days <br />-0.0165 weeks <br />-0.00379 months <br />)
Opened: Dan Lyon
23:55 Nov 2, 2009
NRC Officer: Bill Huffman
Last Updated: Nov 3, 2009
45474 - NRC Website
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