ENS 57431
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ENS Event | |
|---|---|
18:50 Nov 19, 2024 | |
| Title | Manual Reactor Trip |
| Event Description | The following information was provided by the licensee via phone and email:
At 1350 [EST] on 11/19/2024, with Unit 1 in mode 1 at 100% power, the reactor was manually tripped due to an automatic trip of the `B' main feedwater pump turbine. The reactor trip was uncomplicated with all systems responding normally post trip. Operations stabilized the plant in mode 3. Decay heat removal is being accomplished by the steam dumps to the condenser. Emergency feedwater actuated due to low-low steam generator [water] level, as expected. 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. The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: The cause of the 'B' main feedwater pump trip is under investigation. There was maintenance involving the 'B' main feedwater pump at the time of the scram. |
| Where | |
|---|---|
Seabrook  New Hampshire (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+-2.8 h-0.117 days <br />-0.0167 weeks <br />-0.00384 months <br />) | |
| Opened: | Andrew Ferraioli 16:02 Nov 19, 2024 |
| NRC Officer: | Ernest West |
| Last Updated: | Nov 19, 2024 |
| 57431 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | Yes, Manual Scram |
| Before | Power Operation (100 %) |
| After | Hot Standby (0 %) |
Seabrook with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
WEEKMONTHYEARENS 574322024-11-19T18:50:00019 November 2024 18:50:00
[Table view]10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip ENS 574312024-11-19T18:50:00019 November 2024 18:50:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip ENS 566452023-07-30T19:26:00030 July 2023 19:26:00 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 Main Turbine ELECTRO-HYDRAULIC Control (EHC) Oil Level ENS 565652023-05-06T19:52:0006 May 2023 19:52:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Actuations of Reactor Protection System ENS 565642023-04-12T15:07:00012 April 2023 15:07:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Actuation of "B" Emergency Diesel Generator Emergency Power Sequencer ENS 559892022-07-12T14:51:00012 July 2022 14:51:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertent Siren Activation ENS 527182017-04-29T22:44:00029 April 2017 22:44:00 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 Steam Generator Hi-Hi Level Signal and Feedwater Isolation ENS 517652016-03-02T18:12:0002 March 2016 18:12:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Valid Actuation of Emergency Feedwater ENS 517622016-03-02T07:53:0002 March 2016 07:53:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Turbine Trip Causing a Reactor Trip ENS 505132014-10-07T16:20:0007 October 2014 16:20:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertent Siren Actuation ENS 473272011-10-06T16:26:0006 October 2011 16:26:00 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 Low Steam Generator Water Level ENS 462472010-09-13T13:00:00013 September 2010 13:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification for Discharge of 200 Gal Untreated Sanitary Water ENS 458692010-04-23T12:07:00023 April 2010 12:07:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Fatality of Licensee Employee ENS 454032009-10-02T02:39:0002 October 2009 02:39:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unit Experienced a Valid Rps Actuation During Plant Cooldown on Low Steam Generator Levels ENS 441032008-03-27T23:07:00027 March 2008 23:07:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Fatality of Licensee Employee ENS 439212008-01-20T04:02:00020 January 2008 04:02:00 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 Turbine Trip ENS 438492007-12-18T12:39:00018 December 2007 12:39:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Hydraulic Fluid Spill Onsite ENS 436462007-09-17T09:59:00017 September 2007 09:59:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to Local Law Enforcement ENS 416552005-05-01T15:09:0001 May 2005 15:09:00 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 Main Turbine High Vibration ENS 415932005-04-13T08:50:00013 April 2005 08:50:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation During Core Reload Reactor Trip Breakers Opened ENS 414282005-02-22T08:08:00022 February 2005 08:08:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Emergency Diesel Generator and Emergency Feedwater Auto Start on Vital Bus Failure to Transfer ENS 405252004-02-17T18:30:00017 February 2004 18:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Potential Newsworthy Occurrence ENS 404322004-01-08T22:58:0008 January 2004 22:58:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification at Seabrook ENS 404102003-12-22T20:30:00022 December 2003 20:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 402862003-11-01T00:48:0001 November 2003 00:48:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Reactor Trip on Low Steam Generator Water Level ENS 401622003-09-16T13:18:00016 September 2003 13:18:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to Osha at Seabrook Regarding a Fatality 2024-11-19T18:50:00 | |
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