ENS 50355
ENS Event | |
|---|---|
08:32 Aug 12, 2014 | |
| Title | Unusual Event for a Halon Release Near the Tsc and Eof |
| Event Description | The licensee declared an Unusual Event because of a halon discharge in the simulator. This potentially affects access and habitability of the Technical Support Center (TSC) and the Emergency Operations Facility (EOF). The Unusual Event was declared under HU3.1 "toxic, corrosive, asphyxiate, or flammable gases in amounts that have or could have adversely affected normal plant operations." The fire brigade has been dispatched to determine whether a fire actually exists.
The licensee informed State and local agencies and the NRC Resident Inspector. Notified other FEDS (FEMA Ops Center, DHS NICC Watch Officer, DHS SWO) and (Nuclear SSA, FEMA NWC) via email.
The Unusual Event was terminated at 0700 EDT. Halon discharged into the plant simulator. There was no actual fire. Offsite assistance was requested. Local fire department and ambulance are on site. The TSC and EOF have been activated. The halon discharge into the simulator building is not impacting normal plant operations where the ERO [Emergency Response Organization] capabilities and staffing are still required. Therefore, activation for UE [Unusual Event] is being terminated. The Incident Commander released the building for normal access at 0717 EDT. The licensee informed State and local agencies and the NRC Resident Inspector. Notified the R2DO (Nease), IRD (Gott), and NRR (Thomas). Notified other FEDS (FEMA Ops Center, DHS NICC Watch Officer, DHS SWO) and (Nuclear SSA, FEMA NWC) via email.
EVENT DESCRIPTION: This is an update of a previous notification which was made by telephone to the [NRC] Operations Center at approximately 0504 EDT per Event Number 50355. At approximately 0421 EDT on 08/12/2014, the Halon fire suppression system in the Plant Simulator actuated by releasing the Halon. A Notification of Unusual Event (NOUE) was declared at 0432 EDT on the basis that a release of toxic or asphyxiating gas had occurred on site (Emergency Action Level HU3.1). Emergency response personnel reported to the site and prepared to perform emergency response activities. The site fire brigade was dispatched. The local fire department was called and emergency personnel were dispatched to the site. The reason for the Halon discharge is not known at this time and is under investigation. No actual fire was observed. The Plant Simulator is located in the same building with the primary Technical Support Center (TSC) and primary Emergency Operations Facility (EOF). Since the Halon discharge occurred in this building, the site incident commander restricted access to these two primary Emergency Response Facilities, rendering them unavailable for use. The NOUE was terminated at 0700 EDT. Normal access to the TSC and EOF was restored at 0717 EDT. INITIAL SAFETY SIGNIFICANCE EVALUATION: This event had no effect on the operating units, and there was no adverse impact on nuclear safety or on the health and safety of the public. The NRC Resident Inspector has been notified. CORRECTIVE ACTIONS: Offsite fire department personnel assisted by on site fire brigade have validated that no fire condition existed. The building has been ventilated and normal access restored. The failure of the Halon System is being tracked for restoration in accordance with station fire protection documents. Notified R2DO (Hopper) and NRR Daytime EO (Thomas). |
| Where | |
|---|---|
Brunswick  North Carolina (NRC Region 2) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.47 h-0.145 days <br />-0.0207 weeks <br />-0.00475 months <br />) | |
| Opened: | Joseph Stinson 05:04 Aug 12, 2014 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Aug 12, 2014 |
| 50355 - 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 %) |
Brunswick with 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
WEEKMONTHYEARENS 573222024-09-16T16:40:00016 September 2024 16:40:00
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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 520692016-07-06T22:07:0006 July 2016 22:07:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Offsite Notification to the United States Department of Transportation 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 504592014-09-15T17:09:00015 September 2014 17:09:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Siren Activation Capability 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 483622012-10-01T12:45:0001 October 2012 12:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center (Tsc) / Emergency Operations Facility (Eof) Out-Of-Service for Planned Maintenance ENS 480322012-06-17T17:30:00017 June 2012 17:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Outage of Erfis, Spds, Erds, and Ppc ENS 480192012-06-12T21:57:00012 June 2012 21:57:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of the Plant Process Computer System 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 473112011-10-01T20:00:0001 October 2011 20:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Erds Connectivity Due to a Computer Issue ENS 472152011-08-29T16:00:00029 August 2011 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Out of Service for Maintenance 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 458132010-04-05T03:34:0005 April 2010 03:34:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Siren Activation Capability 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 427242006-07-24T21:00:00024 July 2006 21:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss and Restoration of Spds System ENS 419912005-09-14T12:32:00014 September 2005 12:32:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Emergency Preparedness Sirens 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 419262005-08-17T20:15:00017 August 2005 20:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Offsite Emergency Sirensout of Service Due to Severe Weather 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 409552004-08-14T16:25:00014 August 2004 16:25:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Several Offsite Emergency Preparedness Sirens Due to Adverse Weather 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 403152003-11-12T15:03:00012 November 2003 15:03:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Siren Test Failure 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 2024-09-16T16:40:00 | |