ENS 43267
ENS Event | |
|---|---|
11:40 Mar 30, 2007 | |
| Title | Criticality Warning System Alarm Actuation Due to Power Fluctuation |
| Event Description | At approximately 0740 on 3/30/2007, a segment of the inside Criticality Warning System (CWS) covering the Fuel Manufacturing Operation (FMO) failed due to an apparent voltage fluctuation in the power supply to the system. The fluctuation resulted in activation of the CWS evacuation alarm.
All personnel promptly evacuated the facility and the emergency organization assembled in accordance with normal procedures. A total of 5 out of 6 FMO CWS Data Acquisition Modules (DAMS) were affected by apparent power supply fluctuation. Two additional DAMS, which are independent, continued to provide coverage of the Dry Conversion Process (DCP) process areas. The Emergency Director determined that the processes should stay shut down and all personnel not engaged in troubleshooting or recovery actions remain out of the area while investigations and additional testing was conducted. Follow-up tests replaced select hardware, and installed additional power supply monitoring equipment to aid diagnostics. All DAMS have been successfully reset and the inside FMO CWS system returned to normal operation. Current plans are to resume normal operations beginning with the 1500 (evening) shift. The event is being reported within 24-hours pursuant to 10CFR70.50(b)(2) as a safety equipment failure. The licensee will also be providing a courtesy notification to the North Carolina Department of Radiological Protection and the New Hanover County Emergency Management organization. |
| 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:+3 h0.125 days <br />0.0179 weeks <br />0.00411 months <br />) | |
| Opened: | Lon Paulson 14:40 Mar 30, 2007 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Mar 30, 2007 |
| 43267 - 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 | |