ENS 48555
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ENS Event | |
|---|---|
15:42 Dec 4, 2012 | |
| Title | Licensee No Longer Has Control of Emergency Sirens |
| Event Description | At time 0942 [CST] telecommunications technicians reported to the Main Control Room that the site no longer has the ability to control offsite sirens. This was apparently caused by lightning strike in the area prohibiting the ability of the siren control computers to communicate with the sirens. This lost capability to alert a large segment of the population for one hour (by sirens and/or tone alert radios) requires a report per 10 CFR 50.72(b)(3)(xiii).
Technicians are currently attempting to repair and correct this issue by moving another computer to the affected radio repeater in an effort to reestablish control of offsite sirens. At time 1057 the station began contacting offsite sirens agencies including the Louisiana Governor's Office of Homeland Security & Emergency Planning as well as all parishes within the 10 mile EPZ in order to initiate contingency actions for this issue. All agencies were notified as of time 1125. This constitutes a reportable notification of offsite agencies in accordance with 10 CFR 50.72(b)(2)(xi). Plant status remains Mode 1, 100% power, with no grid restrictions to report or radiological releases in progress. A follow up notification will be made to the NRC after the ability to control offsite sirens is restored. Contingency actions are in place until the sirens are restored. The licensee notified state and local governmental agencies as well as the NRC Resident Inspector.
On 12/6/12 at time 0200, River Bend Station was able to restore control to offsite sirens. Silent testing was performed to ensure all necessary controls were regained for all 93 sirens. This testing was performed satisfactorily. Plant status remains Mode 1, 100% with no grid restrictions to report or radiological releases in progress. The licensee notified the NRC Resident Inspector. Notified R4DO (Drake). |
| Where | |
|---|---|
River Bend  Louisiana (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-1.83 h-0.0763 days <br />-0.0109 weeks <br />-0.00251 months <br />) | |
| Opened: | James Henderson 13:52 Dec 4, 2012 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Dec 6, 2012 |
| 48555 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
River Bend with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
WEEKMONTHYEARENS 549912020-11-11T00:27:00011 November 2020 00:27:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertent/Malfunctioning Siren Activation ENS 522932016-10-10T15:32:00010 October 2016 15:32:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to a Spill of a Reportable Quantity of Hydraulic Oil Onsite ENS 515992015-08-03T21:30:0003 August 2015 21:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification for Condensate Spill in the Turbine Building ENS 501092014-05-12T20:00:00012 May 2014 20:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Tritium Confirmed in Water Samples On-Site Underground ENS 497012014-01-07T20:39:0007 January 2014 20:39:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification for Spill in the River Bend Owner Control Area ENS 491222013-06-16T09:56:00016 June 2013 09:56:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Broken Damper Blade Linkage Found on Technical Support Center Ventilation Line ENS 488282013-03-18T21:05:00018 March 2013 21:05:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Radioactive Release Onsite ENS 487852013-02-26T20:30:00026 February 2013 20:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release State and Local Agencies Notified of Inadvertent Tritium Release Due to Overflowing Sump ENS 487322013-02-07T21:53:0007 February 2013 21:53:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertent Emergency Siren Actuation ENS 485552012-12-04T15:42:0004 December 2012 15:42:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Licensee No Longer Has Control of Emergency Sirens ENS 479952012-06-05T10:02:0005 June 2012 10:02:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Filter Train Inoperable ENS 479602012-05-24T18:48:00024 May 2012 18:48:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Manual Reactor Scram Due to a Loss of Feed as Result of a Loss of Switchgear ENS 475412011-12-21T15:30:00021 December 2011 15:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification for Detectable Levels of Tritium in Groundwater Well ENS 466112011-02-11T21:07:00011 February 2011 21:07:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Based on Fire Alarm in Drywell ENS 465462011-01-15T15:33:00015 January 2011 15:33:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Notification of State of Louisiana Agencies Due to Offsite Transport of Potentially Contaminated Injured Individual ENS 461582010-08-07T05:15:0007 August 2010 05:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Inadvertent Sounding of One Offsite Emergency Siren ENS 458362010-04-13T10:01:00013 April 2010 10:01:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Out of Service ENS 453802009-09-24T06:30:00024 September 2009 06:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Inadvertent Siren Sounding ENS 440132008-02-28T18:38:00028 February 2008 18:38:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness "Planned Maintenance on Safety Parameter Display System (Spds) and Emergency Response Data System (Erds) ENS 439522008-02-01T19:45:0001 February 2008 19:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Scheduled Loss of All Main Control Room Annunciators to Support Plant Maintenance ENS 439162008-01-18T16:15:00018 January 2008 16:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Tritium Identified in Water Samples from Piping Leak ENS 439112008-01-17T15:17:00017 January 2008 15:17:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Control Room Annunciators Removed from Service for Planned Maintenance ENS 439042008-01-14T22:10:00014 January 2008 22:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Loss of Main Control Room Annunciator System ENS 439012008-01-13T16:36:00013 January 2008 16:36:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Assessment Capabilities Due to Planned Maintenance Activities ENS 437592007-10-30T18:42:00030 October 2007 18:42:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertent Activation of Offsite Emergency Sirens ENS 424152006-03-13T23:40:00013 March 2006 23:40:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Failure of One Emergency Siren 2020-11-11T00:27:00 | |
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