05000313/FIN-2008004-02
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Finding | |
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| Title | Failure to Promptly Identify and Correct a Condition Adverse to Quality associated with Emergency Switch Gear Chiller Valve VCH-4B (Section 4OA2.2) |
| Description | The inspectors identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion XVI, \\\"Corrective Action,\\\" for the failure of licensee personnel to promptly identify and correct a condition adverse to quality - chill water expansion tank corrosion materials that blocked the Emergency Switchgear Chiller B VCH-4B Level Switch LS-6036 sensing line. The condition caused the chiller to lockout and become inoperable on December 18, 2005, July 21, 2006, and July 25, 2008. Licensee personnel entered this issue in the corrective action program as Condition Report ANO-1-2008-0851. The finding was more than minor because it was associated with the Mitigating Systems Cornerstone attribute of equipment performance and affected the associated cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using NRC Manual Chapter 0609, \\\"Significance Determination Process,\\\" Phase 1 Worksheet, the finding was determined to have very low safety significance because the finding: (1) was not a qualification deficiency confirmed not to result in a loss of operability of essential Chiller B; (2) did not lead to an actual loss of system safety function; (3) did not result in the loss of one train of technical specification equipment for more than its allowed outage time; (4) did not represent an actual loss of function of one or more nontechnical specification trains of equipment designated as risk-significant per 10CFR50.65, for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />; and (5) it did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The inspectors determined that the finding did not have a crosscutting aspect because the first two opportunities to identify and correct the condition were aged and not indicative of current plant performance (Section 4OA2.5). |
| Site: | Arkansas Nuclear  |
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| Report | IR 05000313/2008004 Section 4OA2 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | P Elkmann D Stearns T Mckernon A Sanchez J Josey B Larson |
| INPO aspect | |
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Finding - Arkansas Nuclear - IR 05000313/2008004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Arkansas Nuclear) @ 2008Q3
Self-Identified List (Arkansas Nuclear)
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