ENS 46559
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ENS Event | |
|---|---|
20:18 Jan 20, 2011 | |
| Title | Manual Reactor Trip Due to Loss of Both Main Feed Pumps During Shutdown |
| Event Description | Unit 1 performed a manual reactor trip (from 28% power) due to the trip of the 1B main feedwater pump trip concurrent with the 1A main feedwater pump having been previously tripped per the shutdown procedure. Reactor power was below the setpoint for an automatic reactor trip from a turbine trip.
All rods fully inserted, heat removal is from auxiliary feedwater and condenser steam dumps, and the electrical system is in a normal alignment. The plant has stabilized at normal RCS pressure and temperature. Both Units 1 and 2 are being shutdown as per Tech Spec 3.0.3 associated with an inoperable Nuclear Service Water System. Unit 2 is at 40% and decreasing power due to the Tech Spec action and was not effected by the Unit 1 reactor trip. Both units will be placed in Mode 5. The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Mcguire  North Carolina (NRC Region 2) | |
| 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:+-4.1 h-0.171 days <br />-0.0244 weeks <br />-0.00562 months <br />) | |
| Opened: | Teresa Putnam 16:12 Jan 20, 2011 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Jan 20, 2011 |
| 46559 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | Yes, Manual Scram |
| Before | Power Operation (28 %) |
| After | Hot Standby (0 %) |
McGuire with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
WEEKMONTHYEARENS 568022023-10-18T15:16:00018 October 2023 15:16:00
[Table view]10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Actuation of Auxiliary Feedwater System ENS 564512023-04-02T07:52:0002 April 2023 07:52:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Actuation of Auxiliary Feedwater Motor Driven Pumps ENS 557482022-02-18T09:59:00018 February 2022 09:59:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip and System Actuation ENS 554582021-09-13T04:11:00013 September 2021 04:11:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Specified System Actuation ENS 540472019-05-03T19:54:0003 May 2019 19:54:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip on Over Temperature Delta Temperature ENS 532172018-02-16T15:14:00016 February 2018 15:14:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip During Solid State Protection System Testing ENS 514742015-10-07T10:55:0007 October 2015 10:55:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unplanned Afw Actuation During Refueling Outage Testing ENS 495382013-11-14T18:13:00014 November 2013 18:13:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip Due to Indication of Dropped Control Rods ENS 487752013-02-21T14:57:00021 February 2013 14:57:00 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 Turbine Trip on Loss of Both Main Feed Pumps ENS 485492012-12-02T04:17:0002 December 2012 04:17:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Amsac Actuated at Lower than Expected Turbine Inlet Pressure ENS 467092011-03-30T04:10:00030 March 2011 04:10:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Control Rod Malfunction During Rod Testing Results in Operators Manually Opening Trip Breakers ENS 465592011-01-20T20:18:00020 January 2011 20:18:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip Due to Loss of Both Main Feed Pumps During Shutdown ENS 460032010-06-12T10:44:00012 June 2010 10:44:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip Due to a Control Rod Drop Indication ENS 448692009-02-23T09:06:00023 February 2009 09:06:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Inadvertent Actuation of the Turbine Driven Auxiliary Feedwater Pump ENS 446242008-11-03T07:07:0003 November 2008 07:07:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manually Opened Reactor Trip Circuit Breakers to Insert Control Bank "B ENS 446182008-10-31T16:52:00031 October 2008 16:52:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip Due to Rod Control Malfunction ENS 443182008-06-26T21:32:00026 June 2008 21:32:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Reactor Trip Due to Loss of 1B Reactor Coolant Pump ENS 422112005-12-17T08:11:00017 December 2005 08:11:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip from Full Power Due to a Failed Feed Flow Channel ENS 415782005-04-08T19:43:0008 April 2005 19:43:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Main Steamline Isolation Valves Closed on Valid Signal ENS 414572005-03-02T21:29:0002 March 2005 21:29:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Actuation of Motor Driven Afw Pumps During Outage ENS 414532005-03-01T20:45:0001 March 2005 20:45:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip During a Rapid Shutdown for Steam Leak Repair 2023-04-02T07:52:00 | |
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