ENS 47551
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ENS Event | |
|---|---|
21:20 Dec 23, 2011 | |
| Title | Alert Declared Due to Halon Discharge During Testing |
| Event Description | The licensee declared an alert condition based on the inadvertent discharge of Halon gas into their Emergency Bus Room during system testing. Plant operation was unaffected and the unit continued to operate at full power.
There were no injuries or equipment damage due to the event. The licensee observed no fire or flames in the area. The licensee evacuated the area and provided ventilation to disperse the Halon. The licensee notified the NRC Resident Inspector. Also notified HHS (Jewel Wright).
At 1810 EST on 12/23/11, Robinson terminated the Alert condition based on a return to a habitable atmosphere in the Emergency Bus Room. "The cause for the Halon System actuation appears to have been a Human Performance Error. The test/inhibit switch was placed in the incorrect position." There were no radiological releases for this event. The licensee notified state, local and other governmental agencies concerning this event. Notified R2DO (McCoy), NRR EO (Giitter), IR (Gott), DHS SWO (Arnold), FEMA (O'Connell), DOE (Jackson), USDA (Walters), and HHS(Wright). |
| Where | |
|---|---|
Robinson  South Carolina (NRC Region 2) | |
| Reporting | |
| Emergency class: | Alert |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+-4.43 h-0.185 days <br />-0.0264 weeks <br />-0.00607 months <br />) | |
| Opened: | Joseph Todd 16:54 Dec 23, 2011 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Dec 23, 2011 |
| 47551 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Robinson with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | |
WEEKMONTHYEARENS 550992021-02-09T13:00:0009 February 2021 13:00:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to an Inadvertent Actuation of Emergency Sirens ENS 522902016-10-08T17:17:0008 October 2016 17:17:00 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 Declared Due to Loss of Offsite Power ENS 501782014-06-06T20:22:0006 June 2014 20:22:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Due to a Fire Alarm Inside Containment ENS 494692013-10-23T18:05:00023 October 2013 18:05:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of a Fatality Onsite ENS 494582013-10-21T22:00:00021 October 2013 22:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Release of Petroleum from an Unregulated Source ENS 481992012-08-17T09:52:00017 August 2012 09:52:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to the Unplanned Loss of Annunciators > 15 Minutes ENS 476182012-01-23T23:04:00023 January 2012 23:04:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unsual Event Declared Due to Fire Inside Containment Lasting > 15 Minutes ENS 475512011-12-23T21:20:00023 December 2011 21:20:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declared Due to Halon Discharge During Testing ENS 473022011-09-29T10:02:00029 September 2011 10:02:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Fire Alarm in the Containment ENS 457992010-03-28T22:52:00028 March 2010 22:52:00 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 Alert Declared Due to Fire Affecting Safety Related Equipment ENS 436882007-10-03T22:30:0003 October 2007 22:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to South Carolina Osha Due to Non-Work Related Fatality Onsite ENS 412962004-12-27T05:31:00027 December 2004 05:31:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Fire Inside Protected Area Lasting Greater than 10 Minutes ENS 410252004-09-08T09:56:0008 September 2004 09:56:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - High Water Flow from Lake Robinson Due to Heavy Rain ENS 406882004-04-20T17:10:00020 April 2004 17:10:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Non-Work Related Fatality 2021-02-09T13:00:00 | |
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