ENS 47220
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ENS Event | |
|---|---|
17:00 Aug 29, 2011 | |
| Title | Criticality Accident Alarm System Horn Discovered Inoperable |
| Event Description | On 8/29/11, it was discovered during troubleshooting on an outdoor Criticality Accident Alarm System (CAAS) Data Acquisition Module (DAM #21), that the module had inadequate voltage to properly sound its local alarm horn. The module has been repaired and the system was returned to normal on 8/29/2011.
An investigation into the cause of the failure has been initiated. There are indications that the apparent cause of the failure is an AC to DC converter that had a component short circuit. There were no active fissile material operations impacted by this failure. Consequently, no unsafe condition existed. This event is being reported pursuant to the requirements of 10CFR70.50 (b)(2). The licensee stated that the system had been tested satisfactorily within the last month. The licensee will notify state and local authorities. The licensee also plans to notify NRC Region 2 (Sykes). |
| Where | |
|---|---|
| Global Nuclear Fuel - Americas Wilmington, North Carolina (NRC Region 2) | |
| License number: | SNM-1097 |
| Reporting | |
| 10 CFR 70.50(b)(2) | |
| Time - Person (Reporting Time:+19.5 h0.813 days <br />0.116 weeks <br />0.0267 months <br />) | |
| Opened: | Scott Murray 12:30 Aug 30, 2011 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Aug 30, 2011 |
| 47220 - NRC Website
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Global Nuclear Fuel with 10 CFR 70.50(b)(2) | |
WEEKMONTHYEARENS 497592014-01-22T18:15:00022 January 2014 18:15:00
[Table view]10 CFR 70.50(b)(2) Inoperable Criticality Warning System Local Alarm in Wilmington Field Services Center Building Number 1 ENS 481002012-07-11T21:40:00011 July 2012 21:40:00 10 CFR 70.50(b)(2) Criticality Horns Rendered Inoperable Due to Lightning Strike ENS 478512012-04-18T17:45:00018 April 2012 17:45:00 10 CFR 70.50(b)(2) Local Alarm Horn Was Found to Be Inaudible During Routine Testing ENS 477242012-03-07T18:15:0007 March 2012 18:15:00 10 CFR 70.50(b)(2) Local Alarm Horn Was Found to Be Inaudible During Routine Testing ENS 472202011-08-29T17:00:00029 August 2011 17:00:00 10 CFR 70.50(b)(2) Criticality Accident Alarm System Horn Discovered Inoperable ENS 470612011-07-14T20:55:00014 July 2011 20:55:00 10 CFR 70.50(b)(2) Inoperable Criticality Accident Alarm System Warning Horns ENS 470472011-07-12T21:30:00012 July 2011 21:30:00 10 CFR 70.50(b)(2) Inaudible Criticality Warning Siren ENS 470662011-05-01T16:00:0001 May 2011 16:00:00 10 CFR 70.50(b)(2) Previous Inoperability of Criticality Accident Alarm System Warning Circuit Not Identified ENS 447242008-12-16T11:00:00016 December 2008 11:00:00 10 CFR 70.50(b)(2) Criticality Warning System Disabled ENS 432672007-03-30T11:40:00030 March 2007 11:40:00 10 CFR 70.50(b)(2) Criticality Warning System Alarm Actuation Due to Power Fluctuation ENS 429792006-11-09T10:00:0009 November 2006 10:00:00 10 CFR 70.50(b)(2) Failure of Warning Horns ENS 427472006-08-01T09:00:0001 August 2006 09:00:00 10 CFR 70.50(b)(2) Audible Horn System Malfunction ENS 406332004-04-01T18:00:0001 April 2004 18:00:00 10 CFR 70.50(b)(2) Outdoor Area Criticality Warning System Horn Inoperative 2014-01-22T18:15:00 | |
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