ENS 46086
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ENS Event | |
|---|---|
16:00 Jul 12, 2010 | |
| Title | Electrical Fault Disabled Public Address System Which Supports Various Alarm Annunciators |
| Event Description | At approximately 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br /> (EST) on 7/12/2010, an electrical fault was identified in the fire alarm system. This fault disabled the public address portion of the system which supports annunciation of plant alarms including the following: fire alarm, criticality alarm, take-cover alarm, [carbon dioxide] discharge alarms. Trouble shooting of the problem is continuing. There is no impact to actual detection, suppression, etc. systems. Compensatory measures include the following: stop SNM handling and movement, fire patrols, restriction of hot work, notification to facility personnel, evacuation of nonessential personnel from production areas, fire brigade on standby and radios provided to fire brigade officers and some fire brigade members.
It is believed that the condition was associated with heavy rainfall and possible water intrusion. There were no actual safety consequences to workers, the public, or the environment associated with the event. Potential consequences to workers, the public, or the environment are mitigated by compensatory measures. The licensee notified the NRC Resident Inspector.
The public address portion of the plant alarm system was restored on 7/13/2010. It appears that recent rain storms caused some wiring to develop short circuits. These short circuits were corrected. The system is continuing to be monitored and wiring may be identified that requires replacement. It was confirmed that the criticality alarm portion of the plant alarm system was not impacted during the recent outage. The licensee notified the NRC Resident Inspector. Notified R2 DO (Seymour), NMSS EO (Hiltz) , Fuels Grp (Email) |
| Where | |
|---|---|
| Nuclear Fuel Services Inc. Erwin, Tennessee (NRC Region 2) | |
| License number: | SNM-124 |
| Reporting | |
| 10 CFR 70.50(b)(2) | |
| Time - Person (Reporting Time:+1.97 h0.0821 days <br />0.0117 weeks <br />0.0027 months <br />) | |
| Opened: | Randy Shackelford 17:58 Jul 12, 2010 |
| NRC Officer: | Joe O'Hara |
| Last Updated: | Jul 15, 2010 |
| 46086 - NRC Website | |
Nuclear Fuel Services Inc. with 10 CFR 70.50(b)(2) | |
WEEKMONTHYEARENS 559022022-05-18T18:50:00018 May 2022 18:50:00
[Table view]10 CFR 70.50(b)(2) Criticality Accident Alarm System Speakers Disabled ENS 542182019-08-13T20:00:00013 August 2019 20:00:00 10 CFR 70.50(b)(2) Criticality Accident Alarm System Speaker Failure ENS 524042016-12-01T15:14:0001 December 2016 15:14:00 10 CFR 70.50(b)(2) Office Area Alarm Audibility Disabled ENS 523582016-11-09T16:15:0009 November 2016 16:15:00 10 CFR 70.50(b)(2) Insufficient Alarm Audibility ENS 521902016-08-17T21:39:00017 August 2016 21:39:00 10 CFR 70.50(b)(2) Failure of a Speaker in an Area Potentially Requiring Personnel Evacuation ENS 499982014-04-04T17:15:0004 April 2014 17:15:00 10 CFR 70.50(b)(2) Criticality Accident Evacuation Alarm Not Audible in Certain Areas Outside the Material Handling Area ENS 498482014-02-21T13:39:00021 February 2014 13:39:00 10 CFR 70.50(b)(2) Audibility of Alarm System ENS 460862010-07-12T16:00:00012 July 2010 16:00:00 10 CFR 70.50(b)(2) Electrical Fault Disabled Public Address System Which Supports Various Alarm Annunciators ENS 451792009-06-30T20:00:00030 June 2009 20:00:00 10 CFR 70.50(b)(2) Safety Equipment Failure of the Criticality Alarm System ENS 438832008-01-05T14:00:0005 January 2008 14:00:00 10 CFR 70.50(b)(2) Safety Equipment Failure of the Criticality Alarm System ENS 422262005-12-22T19:00:00022 December 2005 19:00:00 10 CFR 70.50(b)(2), 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Safety Equipment Failure 2022-05-18T18:50:00 | |
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