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During a performance of internal procedure … 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.</br>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.</br>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 hours. The affected TL bench scale experiment equipment will remain shutdown pending further investigation and implementation of associated corrective actions.</br>SAFETY SIGNIFICANCE OF EVENTS - Low safety significance - the discovery did not result in an unsafe condition.</br>SAFETY EQUIPMENT STATUS - Required IROFS TL-HF-01 and TL-HF-02 functionality being re-established.</br>STATUS OF CORRECTIVE ACTIONS - The affected TL process operation remains shutdown pending investigation and implementation of corrective actions.</br>The licensee will be contacting NRC Region 2, state and local government agencies.on 2, state and local government agencies. +
15:44:00, 16 December 2010 +
46,486 +
09:04:00, 17 December 2010 +
15:44:00, 16 December 2010 +
During a performance of internal procedure … 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.</br>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.</br>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 hours. The affected TL bench scale experiment equipment will remain shutdown pending further investigation and implementation of associated corrective actions.</br>SAFETY SIGNIFICANCE OF EVENTS - Low safety significance - the discovery did not result in an unsafe condition.</br>SAFETY EQUIPMENT STATUS - Required IROFS TL-HF-01 and TL-HF-02 functionality being re-established.</br>STATUS OF CORRECTIVE ACTIONS - The affected TL process operation remains shutdown pending investigation and implementation of corrective actions.</br>The licensee will be contacting NRC Region 2, state and local government agencies.on 2, state and local government agencies. +
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00:00:00, 17 December 2010 +
SNM-1097 +
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23:21:38, 24 November 2018 +
09:04:00, 17 December 2010 +
0.722 d (17.33 hours, 0.103 weeks, 0.0237 months) +
15:44:00, 16 December 2010 +
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