ENS Event | |
|---|---|
14:45 Sep 13, 2013 | |
| Title | Item Relied on for Safety May Not Be Reliable |
| Event Description | At about 1045 EDT on 9/13/13, it was discovered that the feed tube level sensor on a press operation is not fail safe upon loss of signal. The sensor is a sole IROFS [Item Relied On For Safety] for a particular sequence. Criticality controls remained in place. Affected equipment has been shut down. No unsafe condition exists. Feed tube level sensor is in place for the sequence to limit mass. At no time was the mass limit exceeded. We are reporting under Part 70, Appendix A, (a)(4) which states that credited IROFS must remain available and reliable. We cannot evaluate reliability in the time required for a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> report. In addition, the affected equipment has been secured. An investigation is underway to determine corrective actions and extent of condition.
The license will notify NRC Region 2.
On 9/13/13, GNF-A 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 49341) due to a discovery that a feed tube level sensor is not fail safe upon loss of signal. After further review, it has been determined that the control remained available, reliable and continued to meet performance requirements. As a result, the event notification is retracted. The licensee has notified NRC Region 2. Notified R2DO (Sykes), NMSS EO (Rubenstone), and IRD (Grant). |
| Where | |
|---|---|
| Global Nuclear Fuel Wilmington, North Carolina (NRC Region 2) | |
| License number: | SNM-1097 |
| Reporting | |
| Part 70 App A (A)(4) | |
| Time - Person (Reporting Time:+-3.83 h-0.16 days <br />-0.0228 weeks <br />-0.00525 months <br />) | |
| Opened: | Scott Murray 10:55 Sep 13, 2013 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Sep 27, 2013 |
| 49341 - NRC Website
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Global Nuclear Fuel with Part 70 App A (A)(4) | |
WEEKMONTHYEARENS 499692014-03-28T17:30:00028 March 2014 17:30:00
[Table view]Part 70 App A (B)(2), Part 70 App A (A)(4) Items Relied on for Safety Not Operable ENS 493412013-09-13T14:45:00013 September 2013 14:45:00 Part 70 App A (A)(4) Item Relied on for Safety May Not Be Reliable ENS 488072013-03-05T13:45:0005 March 2013 13:45:00 Part 70 App A (A)(4) Sole Irofs Pressure Mat Did Not Function as Designed 2014-03-28T17:30:00 | |