ENS 44471
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ENS Event | |
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22:20 Sep 7, 2008 | |
Title | Partial Loss of Offsite Communication Capability Caused by an Unplanned Power Outage |
Event Description | On 09/07/2008 at 1720 CDT, Browns Ferry Nuclear Plant experienced a partial loss of offsite communication to include the Emergency Notification System to the NRC, normal phone communication to offsite, the Operations Duty Specialist ring down phone to Chattanooga and the satellite phone to offsite located in the control room. This loss of communications was the result of an unplanned electrical power outage due to loss of temporary diesel generator supplying power to the communications network. The control room indications and assessment capability were not affected. Cell phones and the Health Physics Radio Network were available to be used onsite to communicate offsite. The plant radio system and sound powered phones were unaffected and plant staff communication capability was available.
Communication capability was restored at 1758 CDT 09/07/2008. Operation of Unit 1, Unit 2 and Unit 3 was not affected by the event. The NRC Sr. Resident Inspector has been notified. This event is reportable under 10CFR50.72(b)(3)(xiii), 'Any event that results in a major loss of emergency assessment capability, offsite response capability, or offsite communications capability (e.g., significant portion of control room indication, Emergency Notification System or offsite notification system.' |
Where | |
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Browns Ferry Alabama (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
Time - Person (Reporting Time:+0.87 h0.0363 days <br />0.00518 weeks <br />0.00119 months <br />) | |
Opened: | Tim Boland 23:12 Sep 7, 2008 |
NRC Officer: | Steve Sandin |
Last Updated: | Sep 7, 2008 |
44471 - 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 %) |
Unit 3 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 543822019-11-12T12:00:00012 November 2019 12:00:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Out of Service ENS 542782019-09-13T09:27:00013 September 2019 09:27:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness En Revision Imported Date 9/17/2019 ENS 520042016-06-13T22:33:00013 June 2016 22:33:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Alert Sirens Failed to Rotate ENS 494552013-10-19T22:05:00019 October 2013 22:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Offsite Communications Due to a Blown Fuse ENS 488232013-03-14T23:00:00014 March 2013 23:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Offsite Communications ENS 483272012-09-20T17:40:00020 September 2012 17:40:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Assessment Capability Due to Inoperable Seismic Monitoring Instrumentation ENS 471242011-08-04T13:35:0004 August 2011 13:35:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Emergency Sirens Due to Weather ENS 469862011-06-25T21:15:00025 June 2011 21:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Meteorological Monitoring Instrumentation Inoperable Due to Loss of Power ENS 468792011-05-24T14:18:00024 May 2011 14:18:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Thirty-Two Emergency Sirens ENS 467932011-04-27T22:01:00027 April 2011 22:01:00 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)(xiii), Loss of Emergency Preparedness Notification of Unusual Event Due to Loss of Offsite Power ENS 444712008-09-07T22:20:0007 September 2008 22:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Offsite Communication Capability Caused by an Unplanned Power Outage ENS 442322008-05-21T20:15:00021 May 2008 20:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Control Room Phone Communications 2019-09-13T09:27:00 | |
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