ENS 56256
ENS Event | |
|---|---|
20:30 Dec 2, 2022 | |
| Title | Fuel Cycle Facility - Loss or Degradation of Safety Items |
| Event Description | The following information was provided by the licensee via email:
It was discovered on 12/2/2022, that an Item Relied on For Safety (IROFS) had failed because it was determined to not be available and reliable in the sinter test grinder (STG) dust collection system. On 11/29/2022, a mass of dry uranium oxide powder greater than expected was identified in the grinder swarf collection can, prompting a shutdown of the STG and further investigation. Subsequent equipment cleanout identified approximately 28.4 kilograms of dry uranium oxide compared to the system safety limit of 43.39 kg. The investigation determined that the safety limit could have been challenged. The failed IROFS resulted in a failure to meet performance requirements. The STG operation remains shut down. Additional controls on moderation remained intact, and at no time was an unsafe condition present. Additional corrective actions, extent of condition, and extent of cause are being investigated. This event is being communicated to meet the reporting requirements of 10CFR70, Appendix A (b)(2). |
| Where | |
|---|---|
| Global Nuclear Fuel Wilmington, North Carolina (NRC Region 2) | |
| License number: | SNM-1097 |
| Reporting | |
| Part 70 App A (B)(2) | |
| Time - Person (Reporting Time:+-3.47 h-0.145 days <br />-0.0207 weeks <br />-0.00475 months <br />) | |
| Opened: | Scott Murray 17:02 Dec 2, 2022 |
| NRC Officer: | Karen Cotton-Gross |
| Last Updated: | Dec 2, 2022 |
| 56256 - NRC Website
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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 | |