ENS 48057
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ENS Event | |
|---|---|
13:20 Feb 13, 2012 | |
| Title | Mass Control Limit Exceeded |
| Event Description | It was discovered on 2/13/12 that the mass control limit in the gadolinia pellet press operation was exceeded. An improperly installed valve allowed a total of 43 kg of uranium powder into the favorable geometry press feed tube, exceeding the 36 kg limit. This resulted in a failed item relied on for safety (IROFS) < 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> condition where a criticality control was not maintained. The press feed mass control is a sole IROFS for a fire accident sequence. Control indications functioned as designed and provided notification of the malfunction to the operator and the operation was secured. The other controls on geometry and moderation were maintained at all times.
At no time was an unsafe condition present. The gadolinia pellet press operation was shut down and the powder was removed by 1000 on 2/13/2012. Additional corrective actions, extent of condition, and extent of cause have been documented. SAFETY SIGNIFICANCE OF EVENTS: At no time was an unsafe condition present SAFETY EQUIPMENT STATUS: Equipment was shut down and powder removed STATUS OF CORRECTIVE ACTIONS: Additional corrective actions, extent of condition, and extent of cause have been documented. This event is being communicated in order to administratively meet the reporting requirements of 10CFR70, Appendix A. The licensee has spoken with Region 2 (Thomas) regarding this issue, and discussed the issue in a Reply to Notice of Violation dated 6/29/2012 letter book number SPM12-030. |
| Where | |
|---|---|
| Global Nuclear Fuel - Americas Wilmington, North Carolina (NRC Region 2) | |
| License number: | SNM-1097 |
| Reporting | |
| Part 70 App A (B)(2) | |
| Time - Person (Reporting Time:+3289.67 h137.07 days <br />19.581 weeks <br />4.506 months <br />) | |
| Opened: | Scott Murray 14:00 Jun 29, 2012 |
| NRC Officer: | Joe O'Hara |
| Last Updated: | Jun 29, 2012 |
| 48057 - NRC Website | |
Global Nuclear Fuel with Part 70 App A (B)(2) | |
WEEKMONTHYEARENS 562562022-12-02T20:30:0002 December 2022 20:30:00
[Table view]Part 70 App A (B)(2) Fuel Cycle Facility - Loss or Degradation of Safety Items ENS 533312018-04-12T23:00:00012 April 2018 23:00:00 Part 70 App A (B)(2) Potentially Degraded Items Relied on for Safety ENS 522512016-09-19T10:00:00019 September 2016 10:00:00 Part 70 App A (B)(2) Uf6 Scrubber Exhaust System Not Operating as Required ENS 516622016-01-19T02:00:00019 January 2016 02:00:00 Part 70 App A (B)(2) Accumulation of Uranium Oxide Powder in the Dry Scrap Recycle Furnace Off-Gas System ENS 499692014-03-28T17:30:00028 March 2014 17:30:00 Part 70 App A (B)(2), Part 70 App A (A)(4) Items Relied on for Safety Not Operable ENS 480382012-06-19T21:00:00019 June 2012 21:00:00 Part 70 App A (B)(2) Degradation of Safety Equipment ENS 480572012-02-13T13:20:00013 February 2012 13:20:00 Part 70 App A (B)(2) Mass Control Limit Exceeded ENS 466692011-03-10T14:15:00010 March 2011 14:15:00 Part 70 App A (B)(2) Malfunctioning Valve Leads to a Loss of Defense in Depth ENS 464862010-12-16T15:44:00016 December 2010 15:44:00 Part 70 App A (B)(2) Both Hf Detectors in Ghs Test Loop Failed to Be Available and Operable ENS 462442010-09-10T14:00:00010 September 2010 14:00:00 Part 70 App A (B)(2) Degradation of Safety Equipment ENS 461682010-01-25T13:50:00025 January 2010 13:50:00 Part 70 App A (B)(2) Degradation of an Item Relied on for Safety ENS 436372007-09-12T15:30:00012 September 2007 15:30:00 Part 70 App A (B)(2) Moderation Control Item Relied on for Safety Degradation 2022-12-02T20:30:00 | |
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