ENS Event | |
|---|---|
16:00 Aug 12, 2011 | |
| Title | Integrated Safety Analysis (Isa) - Unanalyzed Condition |
| Event Description | As part of the ongoing GNF-A review of the Fuel Manufacturing Operation (FMO) Integrated Safety Analysis, accident sequences associated with hydrogen piping are being evaluated. As part of this evaluation, facility walk downs of the piping were performed that identified a configuration that had not previously been analyzed. Based on a review of this as found condition, it was determined at approximately 12 p.m. on August 12, 2011 that the system was improperly analyzed in the ISA and resulted in a failure to meet performance requirements.
Hydrogen supply to the affected piping system inside the building has been isolated. Additional corrective actions and extent of condition are being evaluated. This event is being reported pursuant to the reporting requirements of 10 CFR 70 Appendix A (b)(1) within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of discovery. The licensee will notify NRC Region 2 and appropriate state and local authorities.
Unnecessary piping branches have been removed and caps welded in place. The new piping configuration has been analyzed for ISA accident sequences. Based upon this, hydrogen supplies to affected equipment will resume and normal operations will commence. The licensee will notify NRC Region 2. Notified R2DO (Widmann) and NMSS EO (Campbell). |
| Where | |
|---|---|
| Global Nuclear Fuel Wilmington, North Carolina (NRC Region 2) | |
| License number: | SNM-1097 |
| Reporting | |
| Part 70 App A (B)(5) | |
| Time - Person (Reporting Time:+19 h0.792 days <br />0.113 weeks <br />0.026 months <br />) | |
| Opened: | Scott Murray 11:00 Aug 13, 2011 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Aug 24, 2011 |
| 47152 - NRC Website
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Global Nuclear Fuel with Part 70 App A (B)(5) | |
WEEKMONTHYEARENS 473082011-09-29T15:20:00029 September 2011 15:20:00
[Table view]Part 70 App A (B)(5) Equipment Configuration Different than Analyzed in the Isa ENS 471522011-08-12T16:00:00012 August 2011 16:00:00 Part 70 App A (B)(5) Integrated Safety Analysis (Isa) - Unanalyzed Condition ENS 441612008-04-23T14:00:00023 April 2008 14:00:00 Part 70 App A (B)(5) Non Critical-Safe Container Brought Into Safe Store Area ENS 435422007-07-31T16:00:00031 July 2007 16:00:00 Part 70 App A (B)(5) 24 Hour Report of a Process Not Included in the Integrated Safety Analysis 2011-09-29T15:20:00 | |