ENS 46486
ENS Event | |
|---|---|
15:44 Dec 16, 2010 | |
| Title | Both Hf Detectors in Ghs Test Loop Failed to Be Available and Operable |
| Event Description | During a performance of internal procedure to verify functionality of installed HF detectors in the Test Loop (TL) Gas Handling System (GHS) room, it was discovered at about 1044 [EST on] 12/16/10, that both IROFS TL-HF-01 and IROFS TL-HF-02 failed to pass internal test requirements. At least one of these HF detector IROFS is required to be available and operable to meet 10 CFR 70.61 performance requirements.
The installed HF detector electrochemical sensors performance appears to have been degraded as a result of low room 'relative humidity' as a result of unusually cold outdoor conditions. The independent IROFS TL-HF-04 (an administrative control) remained intact, thus no unsafe condition existed. While one documented IROFS remained functional (TL-HF-04) to assure the consequence of chemical and radiological exposure is maintained low, TL-HF-04 could not alone meet 10 CFR 70.61 performance requirements. No loss of UF6 containment occurred in affected process equipment. The degradation of TL-HF-01 and TL-HF-02 was observed as part of the IROFS' periodic surveillance. This event is therefore being reported pursuant to the requirements of 10 CFR 70 Appendix A(b)(2) within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The affected TL bench scale experiment equipment will remain shutdown pending further investigation and implementation of associated corrective actions. SAFETY SIGNIFICANCE OF EVENTS - Low safety significance - the discovery did not result in an unsafe condition. SAFETY EQUIPMENT STATUS - Required IROFS TL-HF-01 and TL-HF-02 functionality being re-established. STATUS OF CORRECTIVE ACTIONS - The affected TL process operation remains shutdown pending investigation and implementation of corrective actions. The licensee will be contacting NRC Region 2, state and local government agencies. |
| 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:+17.33 h0.722 days <br />0.103 weeks <br />0.0237 months <br />) | |
| Opened: | Julie Olivier 09:04 Dec 17, 2010 |
| NRC Officer: | John Knoke |
| Last Updated: | Dec 17, 2010 |
| 46486 - NRC Website | |
Global Nuclear Fuel with Part 70 App A (B)(2) | |
WEEKMONTHYEARENS 562562022-12-02T20:30:0002 December 2022 20:30:00
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