ENS 50751
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ENS Event | |
|---|---|
23:13 Jan 22, 2015 | |
| Title | Notification of Unusual Event Declared Due to Toxic Gas in the Security Diesel Building |
| Event Description | At 1801 EST, the control room received multiple fire alarms in the control room. At 1803, site security notified the control room of the presence of smoke in the security diesel building. At 1813, the licensee declared a Notification of Unusual Event due to the presence of toxic gas in the security diesel building on the battery/UPS side of the building. The fire suppression (NOVEC) system had discharged. Both the Technical Support Center and the Operations Support Center were fully manned.
The site fire brigade made entry into the building and saw no evidence of fire but they did see and smell an acrid odor from an apparent electrical fire as well as the presence of the NOVEC fire suppressant. Offsite assistance was requested but not required to mitigate the event. Investigation of the cause of the toxic gas is under investigation. At this time, no security equipment is affected. Both the Technical Support Center and the Operations Support Center were fully manned. The licensee notified the State of North Carolina, New Hanover and Brunswick counties, and the NRC Resident Inspector. Notified DHS SWO, FEMA Operations Center, DHS NICC, FEMA National Watch Center (email) and Nuclear SSA (email).
At time 1923 EST, the Notification of Unusual Event was terminated after normal access to the security diesel building was restored. The cause of the event is under investigation. The licensee notified the State of North Carolina, New Hanover and Brunswick counties, and the NRC Resident Inspector. Notified R2DO (McCoy), IRD (Stapleton), NRR (Evans), DHS SWO, FEMA Operations Center, DHS NICC, FEMA National Watch Center (email) and Nuclear SSA (email). |
| Where | |
|---|---|
Brunswick  North Carolina (NRC Region 2) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-4.7 h-0.196 days <br />-0.028 weeks <br />-0.00644 months <br />) | |
| Opened: | Justin Eastman 18:31 Jan 22, 2015 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Jan 22, 2015 |
| 50751 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 567972023-10-16T02:56:00016 October 2023 02:56:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Due to Fire Not Verified to Be Extinguished within 15 Minutes ENS 548122020-08-04T03:12:0004 August 2020 03:12:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to a Loss of Offsite Power ENS 540522019-05-07T02:04:0007 May 2019 02:04:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Noue Due to Fire Lasting Longer than 15 Minutes in Turbine Building ENS 539612019-03-28T18:50:00028 March 2019 18:50:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unusual Event Declared Due to Rcs Unidentified Leakage ENS 536092018-09-15T04:00:00015 September 2018 04:00:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration En Revision Imported Date 9/19/2018 ENS 520822016-07-13T00:39:00013 July 2016 00:39:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declared for a Fire in the Service Water Building ENS 517152016-02-07T18:26:0007 February 2016 18:26:00 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 Manual Scram and Alert Declaration Due to Electrical Fault Resulting in Fire/Explosion ENS 507512015-01-22T23:13:00022 January 2015 23:13:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Declared Due to Toxic Gas in the Security Diesel Building ENS 503552014-08-12T08:32:00012 August 2014 08:32:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unusual Event for a Halon Release Near the Tsc and Eof ENS 497882014-02-03T15:03:0003 February 2014 15:03:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Toxic Gas Release That Could Affect Normal Operation ENS 497132014-01-11T00:48:00011 January 2014 00:48:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Explosion within Protected Area Boundary ENS 488902013-04-05T10:24:0005 April 2013 10:24:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to a Fire Alarm in the Stack Filter House ENS 487832013-02-26T14:00:00026 February 2013 14:00:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Toxic Gas Leak ENS 474442011-11-16T08:01:00016 November 2011 08:01:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Due to Drywell Leakage Greater than 10 Gpm ENS 468732011-05-23T19:35:00023 May 2011 19:35:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declared Due to Halon Discharge in Emergency Diesel Generator Building ENS 459802010-06-06T15:37:0006 June 2010 15:37:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Brunswick Declared Alert Due to Halon Discharge in Emergency Diesel Generator Building ENS 457962010-03-27T02:45:00027 March 2010 02:45:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Dut to Fire Greater than 15 Minutes in Turbine Building ENS 457112010-02-19T16:11:00019 February 2010 16:11:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unsual Event Due to Carbon Dioxide Discharge in the High Pressure Coolant Injection (Hpci) Room ENS 429552006-11-01T23:37:0001 November 2006 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, 10 CFR 50.72(b)(2)(iv)(A), System Actuation - ECCS Discharge Unit 2 Declared an Unusual Event Due to Loss of Offsite Power to the 4Kv Emergency Buses ENS 419832005-09-13T03:14:00013 September 2005 03:14:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Hurricane Ophelia Warning ENS 409532004-08-14T17:08:00014 August 2004 17:08:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notice of Unusual Event Emergency Declared Due to Loss of Offsite Power ENS 409512004-08-13T22:20:00013 August 2004 22:20:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notice of Unusual Event Declared Due to Hurricane Warning ENS 401642003-09-17T02:40:00017 September 2003 02:40:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event at Brunswick Due to Hurricane Warning 2023-10-16T02:56:00 | |
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