ENS 57249
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ENS Event | |
|---|---|
22:37 Jul 28, 2024 | |
| Title | Automatic Reactor Trip |
| Event Description | The following information was provided by the licensee via phone and email:
At 1837 EDT on 7/28/24, with Unit 1 in mode 1 at 100 percent power, the reactor automatically tripped due to inadvertent closure of a main steam isolation valve. During the trip, auxiliary feedwater actuated. All other systems responded normally post-trip. Operations stabilized the plant in mode 3. Decay heat is being removed by atmospheric dump valves and auxiliary feedwater. Unit 2 is not affected. This event is being reported pursuant to 10 CFR 50.72(b)(2)(iv)(B) and 10 CFR 50.72(b)(3)(iv)(A). The NRC resident inspector has been notified. |
| Where | |
|---|---|
Saint Lucie  Florida (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:+-0.65 h-0.0271 days <br />-0.00387 weeks <br />-8.9037e-4 months <br />) | |
| Opened: | Dave Young 21:58 Jul 28, 2024 |
| NRC Officer: | Ian Howard |
| Last Updated: | Jul 28, 2024 |
| 57249 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | A/R |
| Before | Power Operation (100 %) |
| After | Hot Standby (0 %) |
Saint Lucie with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
WEEKMONTHYEARENS 574252024-11-15T15:01:00015 November 2024 15:01:00
[Table view]10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip ENS 572492024-07-28T22:37:00028 July 2024 22:37:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip ENS 571772024-06-18T07:17:00018 June 2024 07:17:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip ENS 571612024-06-04T17:52:0004 June 2024 17:52:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip ENS 560872022-09-03T02:48:0003 September 2022 02:48:00 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 Feed Pump ENS 556412021-12-10T15:24:00010 December 2021 15:24:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip ENS 550782021-01-20T23:22:00020 January 2021 23:22:00 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 Trip of Motor Control Center ENS 542622019-09-07T12:24:0007 September 2019 12:24:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Trip ENS 540272019-04-25T13:18:00025 April 2019 13:18:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Trip Due to Turbine Generator Trip ENS 537032018-10-29T04:00:00029 October 2018 04:00:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Due to Inadequate Feedwater Flow ENS 536652018-10-12T04:00:00012 October 2018 04:00:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Trip ENS 530362017-10-26T06:12:00026 October 2017 06:12:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip Following a Loss of Load ENS 527572017-05-15T22:00:00015 May 2017 22:00:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Valid Emergency Diesel Generator Signal Generated Upon Loss of 4160V Power ENS 521912016-08-21T23:37:00021 August 2016 23:37:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event - Loss of Offsite Power ENS 514232015-09-17T16:22:00017 September 2015 16:22:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Valid Actuation of Uv Relays Following Loss of Unit 2 Startup Transformer ENS 513022015-08-10T02:15:00010 August 2015 02:15:00 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 Testing ENS 506072014-11-12T20:48:00012 November 2014 20:48:00 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 Lowering Steam Generator Water Level ENS 495362013-11-14T17:18:00014 November 2013 17:18:00 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 Low Level in the 2B Steam Generator ENS 495282013-11-12T05:02:00012 November 2013 05:02:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Due to Unisolable Leak in Digital Electro-Hydraulic System ENS 490822013-05-31T11:12:00031 May 2013 11:12:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Due to an Anticipated Loss of Condenser Cooling ENS 488182013-03-12T18:51:00012 March 2013 18:51:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Automatic Reactor Trip on Thermal Margin/Low Pressure ENS 483882012-10-08T01:40:0008 October 2012 01:40:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Essential Bus Deenergized While Defueled ENS 483692012-10-03T12:43:0003 October 2012 12:43:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Failure of Startup Transformer Caused Undervoltage Condition on Essential Bus ENS 479872012-06-02T23:35:0002 June 2012 23:35:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Reactor Trip Due to a Turbine Control System Failure ENS 479152012-05-11T07:55:00011 May 2012 07:55:00 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 Feedwater Control Valve Failure ENS 477932012-03-31T04:22:00031 March 2012 04:22:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Due to Uncontrolled Cooldown ENS 477522012-03-19T03:36:00019 March 2012 03:36:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Due to Control Element Assembly Anomalous Behavior ENS 476572012-02-10T06:34:00010 February 2012 06:34:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Maintenance Activities Cause an Inadvertent Emergency Diesel Generator Start ENS 473532011-10-19T09:28:00019 October 2011 09:28:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip on Loss of Condenser Vacuum ENS 471782011-08-22T19:13:00022 August 2011 19:13:00 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 Manual Reactor Trip Due to Rising Condenser Backpressure ENS 469282011-06-06T07:29:0006 June 2011 07:29:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Error During Reactor Protection System Surveillance Leads to Reactor Trip ENS 460182010-06-16T21:10:00016 June 2010 21:10:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip After Two Control Rods Dropped ENS 458432010-04-15T19:39:00015 April 2010 19:39:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unplanned Manual Reactor Trip ENS 453742009-09-21T17:34:00021 September 2009 17:34:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unplanned Manual Reactor Trip During Reactor Startup ENS 449522009-04-01T22:05:0001 April 2009 22:05:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unplanned Manual Reactor Trip ENS 442762008-06-07T12:18:0007 June 2008 12:18:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip Following the Trip of a Condensate Pump ENS 442682008-06-04T21:30:0004 June 2008 21:30:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Following Loss of Main Feedwater Pump ENS 439412008-01-29T10:31:00029 January 2008 10:31:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Manual Reactor Trip to Repair Rcp "2B1" Seal Package ENS 438742007-12-29T06:31:00029 December 2007 06:31:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip When Five Control Rods Unexpectedly Dropped 20 Inches ENS 426472006-06-16T02:23:00016 June 2006 02:23:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Due to Digital Electro-Hydraulic Leak ENS 422772006-01-20T13:56:00020 January 2006 13:56:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Rps Actuation ENS 419112005-08-11T14:48:00011 August 2005 14:48:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip on a Condensate Pump Bus Lockout ENS 417152005-05-19T00:59:00019 May 2005 00:59:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Inadvertent De-Energization of 4160 V Safety Related A.C. Bus with Edg Auto Start ENS 412972004-12-27T22:20:00027 December 2004 22:20:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Following Problem with Steam Generator Water Level Control ENS 412932004-12-25T11:52:00025 December 2004 11:52:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unit 2 Manually Tripped to Remove Failing Condensate Pump from Service ENS 410722004-09-26T03:56:00026 September 2004 03:56:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event Declared Due to a Loss of Offsite Power ENS 410182004-09-04T05:56:0004 September 2004 05:56:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation Manual Reactor Trip Due to Steam Generator Level Oscillations ENS 404032003-12-20T14:49:00020 December 2003 14:49:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Rps Actuation Due to Loss of Turbine Generator Excitation ENS 403752003-12-04T21:32:0004 December 2003 21:32:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation St. Lucie Unit 2 Manual Reactor Trip Due to Loss of Condensate Pump 2024-07-28T22:37:00 | |
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