05000390/FIN-2016001-10
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Finding | |
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| Title | Failure to Maintain an Adequate Surveillance Procedure for Emergency Core Cooling System Venting |
| Description | The inspectors identified an apparent violation of TS 5.7.1.1.a, Procedures, for the licensees failure to maintain procedure 1-SI-63-10.1-A, ECCS Discharge Pipes Venting Train A Inside Containment, Revisions 11-16, in accordance with the requirements of Regulatory Guide 1.33. Specifically, the procedure did not have provisions for quantifying accumulated gases during venting which allowed emergency core cooling system (ECCS) piping to be vented without being evaluated for potential adverse impacts on system operability. The licensee implemented manual ultrasonic testing (UT) of gas accumulation and entered this issue into their corrective action program as CR 1136359. The performance deficiency was more than minor because, if left uncorrected, it had the potential to lead to a more significant safety concern. Specifically, if left uncorrected, the potential existed for an unacceptable void affecting ECCS operability to develop prior to the next scheduled surveillance. The inspectors determined the finding could not be screened to GREEN and may require a detailed risk evaluation following a determination of whether the finding represents a loss of system and/or function. Because the safety characterization of this finding is not yet finalized, it is being documented with a significance of To Be Determined (TBD). The inspectors determined that the finding had a cross-cutting aspect of Change Management in the area of Human Performance because the licensee failed to use a systematic process to implement changes to the ECCS venting procedure to ensure that Generic Letter 2008-01 commitments would continue to be met. |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2016001 Section 4OA2 |
| Date counted | Mar 31, 2016 (2016Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | B Bishop C Kontz D Jones D Kern D Lanyi J Austin J Eargle J Hamman J Montgomery J Nadel R Reyes S Shaha Blameya Lerch C Young D Dumbacher D Jones G Callaway J Eargle J Hamman J Jandovitz J Nadel L Micewski N. Pitoniak R Fanner S Sanchez |
| Violation of: | Technical Specification |
| CCA | H.3, Change Management |
| INPO aspect | LA.5 |
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Finding - Watts Bar - IR 05000390/2016001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2016Q1
Self-Identified List (Watts Bar)
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