05000390/FIN-2015002-01
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Finding | |
|---|---|
| Title | Residual Heat Removal Flow Control Valves not Scoped in In-Service Testing Program |
| Description | The NRC identified a NCV of 10 CFR 50.55a, Codes and Standards, for the licensees failure to meet the test requirements set forth in the American Society of Mechanical Engineers ASME Operation and Maintenance (OM) for Residual Heat Removal (RHR) flow control valves (FCVs). Specifically, TVA failed to scope the RHR FCVs into their In-Service Testing (IST) program. Immediate corrective actions included modifying the RHR pump testing procedures to perform the required remote position indication testing. The licensee entered this issue into their corrective action program as PER 995791. The performance deficiency was determined to be more than minor because if left uncorrected, the failure to perform required IST testing could lead to a more significant safety concern in that valve degradation could go unnoticed resulting in undetected inoperability. The inspectors determined that this finding was of very low safety significance (Green) because the finding did not represent an actual loss of function of a single train for greater than its TS allowed outage time. The performance deficiency had a cross-cutting aspect of Conservative Bias in the area of Human Performance because the licensee failed to use conservative decision making practices in their evaluation of the status of the RHR FCVs after being challenged by the NRC. |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2015002 Section 1R15 |
| Date counted | Jun 30, 2015 (2015Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | A Blarney C Cheung J Eargle J Hamman J Nadel J Rivera-Ortiz P Cooper R Egli R Hickok T Palmer W Russell |
| Violation of: | Technical Specification - Procedures Technical Specification 10 CFR 50.55a |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Watts Bar - IR 05000390/2015002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2015Q2
Self-Identified List (Watts Bar)
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