05000424/FIN-2012004-01
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Finding | |
|---|---|
| Title | Ineffective Corrective Action Renders Unit 1A ESF Chiller Inoperable |
| Description | A NRC identified, non-cited violation (NCV) for failure to meet the requirements of 10 CFR 50, Appendix B, Criterion XVI was identified. Specifically, the licensees failure to follow the requirements of 10 CFR 50, Appendix B, Criterion XVI to promptly identify and correct a condition adverse to quality. The condition adverse to quality was that the Unit 1A Engineered Safety Features (ESF) chiller purge compressor resistance temperature detector (RTD) was discovered out of its thermo well. The licensee reinstalled the RTD and took no additional corrective actions. During a subsequent walk-down by a resident inspector and system engineer, they found the RTD not in its thermo well and they informed the control room operators. The licensees investigation revealed that the RTDs thermo well threads had been cross threaded. The licensees immediate action was to install a clamping device to hold the RTD inside the thermo well. The licensee has entered the issue into their corrective action program (CR 51198) and has initiated actions to permanently correct the issue with the Unit 1A ESF chiller purge compressor RTD. This issue is more than minor because it is associated with a cornerstone attribute and adversely affects the objective of the Mitigating Systems cornerstone. Specifically, the performance deficiency is an equipment performance issue which affects the availability, reliability, and capability of the A train ESF chiller to perform its intended safety function. The finding was determined to be Green because the event did not represent an actual loss of safety function of a single train for greater than its Technical Specification allowed outage time. The inspectors determined that the cause of this finding was related to the Corrective Action Program component of the Problem Identification and Resolution cross-cutting area due to less-than-adequate problem evaluation. P.1(c). Specifically, the corrective maintenance actions used to resolve the issue of the purge unit RTD becoming dislodged from its thermo well were less than adequate. |
| Site: | Vogtle  |
|---|---|
| Report | IR 05000424/2012004 Section 1R12 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Vargas Mendez F Ehrhardt G Croon M Cain R Williams T Chandler |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Vogtle - IR 05000424/2012004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Vogtle) @ 2012Q3
Self-Identified List (Vogtle)
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