ENS 44724
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ENS Event | |
|---|---|
11:00 Dec 16, 2008 | |
| Title | Criticality Warning System Disabled |
| Event Description | At approximately 0600 on 12/16/2008, the horns of the inside Criticality Warning System (CWS) covering the Fuel Manufacturing Operation (FMO) were discovered to be in manual mode. On 12/12/08 at approximately 0700, the horns had been taken out of automatic mode and placed in manual mode as part of system maintenance activities at 0700 and inadvertently remained in this condition until this morning at 0600. According to a preliminary investigation, it appears that following maintenance on 12/12/08, incomplete system restoration left the automatic horn function disabled but the detection system remained operational.
Once identified, the system was immediately restored to the automatic mode and the inside FMO CWS system was returned to normal operation. Follow-up tests have confirmed that the warning system horns are fully operational. The event is being reported within 24-hours pursuant to 10CFR70.50(b)(2) as an event in which safety equipment was disabled. During the time that the warning system was disabled, there were no conditions that would have resulted in warning system activation. Corrective actions have been taken to prevent re-occurrence. The licensee will be notifying NRC Region 2 as well as State and local governments. |
| 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:+5.38 h0.224 days <br />0.032 weeks <br />0.00737 months <br />) | |
| Opened: | Scott Murray 16:23 Dec 16, 2008 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Dec 16, 2008 |
| 44724 - 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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