ENS 49455
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ENS Event | |
|---|---|
22:05 Oct 19, 2013 | |
| Title | Partial Loss of Offsite Communications Due to a Blown Fuse |
| Event Description | On 10/19/2013 at 1705 CDT, Browns Ferry Nuclear Plant (BFN) experienced a partial loss of offsite communications, which included the NRC Emergency Notification System, the Emergency Plan Paging System and normal phone communication to offsite. Main control room indications and assessment capability were not affected. The Nextel cellular phone system and the satellite phones in the control rooms were unaffected. The plant radio system was also unaffected. The Emergency Response Data System is currently out of service due to planned maintenance on the associated offsite power supply. Operation of BFN Unit 1, Unit 2, and Unit 3 was not affected by the event.
The BFN facilities personnel found a blown fuse in one of the temporary Diesel Generators (DGs) supplying the node associated with the outside phone communications. The fuse was replaced and the DG has been in-service with no issues. Normal communications and access have been restored. The NRC Senior 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 | |
|---|---|
Browns Ferry  Alabama (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+0.92 h0.0383 days <br />0.00548 weeks <br />0.00126 months <br />) | |
| Opened: | Mark Moebes 23:00 Oct 19, 2013 |
| NRC Officer: | Dong Park |
| Last Updated: | Oct 19, 2013 |
| 49455 - 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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