05000424/FIN-2011005-01
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Finding | |
|---|---|
| Title | Human Performance Error Results in Inoperability of TDAFW Pump |
| Description | A Green self-revealing non-cited violation (NCV) of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified. Specifically, the licensee inadvertently operated the Unit 2 turbine driven auxiliary feedwater (TDAFW) pump with the suction source isolated. As a result, the TDAFW pump operated with no suction source for a period of 1 minute 20 seconds and was rendered inoperable for a period of approximately 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br />. The licensee immediately secured the pump when suction and discharge pressures became erratic and unstable. The licensee performed an engineering evaluation and assessment to ensure the pump was not damaged as a result of running the pump with the suction valves closed. The licensee entered this issue into their corrective action program (CAP) as CR 358773. This issue was more than minor because it adversely affected an objective of the Mitigating Systems cornerstone. Specifically, the performance deficiency affected the availability, reliability, and capability of the Unit 2 TDAFW pump to provide secondary decay heat removal. 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 (TS) allowed outage time. The inspectors determined that the cause of this finding was related to the Work Practices component of the Human Performance crosscutting area due to less-than-adequate human error prevention techniques H.4(a). Specifically, procedural place keeping techniques were less than adequate. |
| Site: | Vogtle  |
|---|---|
| Report | IR 05000424/2011005 Section 1R22 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.22 |
| Inspectors (proximate) | F Ehrhardt M Bates J Hickey M Cain R Baldwin B Caballero T Chandler T Lighty |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
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Finding - Vogtle - IR 05000424/2011005 | |||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Vogtle) @ 2011Q4
Self-Identified List (Vogtle)
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