ENS 55458
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ENS Event | |
|---|---|
04:11 Sep 13, 2021 | |
| Title | Specified System Actuation |
| Event Description | At 0011 EDT, with Unit 2 in Mode 5 (Cold Shutdown), actuations of the 2B Diesel Generator (DG) and the 2B Motor Driven Auxiliary Feedwater (AFW) Pump occurred during Engineered Safety Features Actuation Periodic Testing while resetting the 2B DG Load Sequencer. The 2B DG was running unloaded following test actuation, and during realignment from the test, a blackout condition was experienced when the breaker opened supplying the 4160 Volt Essential Power System 2ETB from the Standby Auxiliary Power Transformer SATB. Sequencer actuation closed the emergency breaker to 2ETB and loaded the 2B Motor Driven AFW Pump onto the bus. Steam supply valves to the Turbine Driven AFW Pump were open from the previous test configuration.
This event is being reported in accordance with 10CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the 2B DG and the 2B Motor Driven AFW Pump. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
Mcguire  North Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+1.7 h0.0708 days <br />0.0101 weeks <br />0.00233 months <br />) | |
| Opened: | Travis Rollins 05:53 Sep 13, 2021 |
| NRC Officer: | Bethany Cecere |
| Last Updated: | Sep 13, 2021 |
| 55458 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
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 2023-04-02T07:52:00 | |
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