ENS Event | |
|---|---|
15:26 Mar 6, 2014 | |
| Title | Feed Tube Level Sensor Failed as an Item Relied on for Safety |
| Event Description | Feed tube level sensor was found to be in a state such that it has failed as an IROFS [Item Relied On For Safety] for a fire accident sequence leading to the loss of a criticality control. Another IROFS is in place and the accident sequence continues to meet performance requirements. Less than a safe mass was always maintained. This event is being reported because only one item relied on for safety, as documented in the Integrated Safety Analysis summary, remains available and reliable to prevent a nuclear criticality accident, and has been in this state for greater than eight hours.
Portion of the plant affected: FMO [Fuel Manufacturing Operation] Press. The licensee notified the North Carolina State Radiation Protection Branch, New Hanover County Emergency Management, and NRC Region II.
On 3/6/14, GNF-A [Global Nuclear Fuels - America] conservatively made a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> event notification (EN 49878) due to a discovery that a feed tube level sensor had failed. After further review, it has been determined that a second control remained available, reliable, and the remaining IROFS was sufficient to meet performance requirements. As a result, the event notification is retracted. Notified R2DO (Vias) and NMSS EO (Lombard). |
| Where | |
|---|---|
| Global Nuclear Fuel Wilmington, North Carolina (NRC Region 2) | |
| License number: | SNM-1097 |
| Reporting | |
| Part 70 App A (A)(5) | |
| Time - Person (Reporting Time:+-4.07 h-0.17 days <br />-0.0242 weeks <br />-0.00558 months <br />) | |
| Opened: | Phillip Ollis 11:22 Mar 6, 2014 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Apr 3, 2014 |
| 49878 - NRC Website
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Global Nuclear Fuel with Part 70 App A (A)(5) | |
WEEKMONTHYEARENS 498782014-03-06T15:26:0006 March 2014 15:26:00
[Table view]Part 70 App A (A)(5) Feed Tube Level Sensor Failed as an Item Relied on for Safety ENS 482022012-08-17T16:39:00017 August 2012 16:39:00 Part 70 App A (A)(5) Only One Irofs Available for a Spill in the Ceramics Area 2014-03-06T15:26:00 | |