05000237/FIN-2009005-03
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Finding | |
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| Title | Preconditioning the Unit 2 Emergency Diesel Generator Prior to Performing TS Surveillance Requirements |
| Description | The inspectors identified a finding of very low significance and associated NCV of 10 CFR 50 Appendix B, Criterion XI, Test Control, because the licensee unacceptably preconditioned the Unit 2 Emergency Diesel Generator (EDG) prior to performing Technical Specification (TS) Surveillance Requirements (SR) 3.8.1.19.c.4, 3.8.1.12.c.3, and 3.8.1.10. These TS SRs involved verifying that the EDG supplied steady state frequency would be acceptable following a loss of offsite power coincident with and without a loss of coolant accident, and following the loss of the largest post-accident load. Specifically, the inspectors identified that the licensee routinely performed governor oil change outage maintenance activities which involved a section that tuned the Unit 2 diesel governors response to a load change just prior to performing these TS SRs. This issue has been entered into the licensees CAP as IR 1000609. The licensee had not reached a conclusion on corrective actions by the end of the inspection period. This finding was determined to be more than minor because the finding, if left uncorrected, would become a more significant safety concern. Unacceptable preconditioning the EDG could mask latent performance issues and affect the ability of the EDG to supply safety-related power to vital loads during an event. The inspectors performed a Phase 1 SDP evaluation and determined that this issue was Green because it did not result in an inoperable Unit 2 EDG. The failure to adequately coordinate the work activity of the preventive maintenance and post-maintenance testing with the TS SR activities was the principal contributor to this finding and was reflective of recent performance. This finding had a cross-cutting aspect in the area of Work Control. Specifically, the licensee did not appropriately coordinate work activities by incorporating actions to address the impact of the work as different job activities. The scheduling of the work activities resulted in the pre-conditioning of the EDG prior to performing the surveillance tests. H.3(b |
| Site: | Dresden  |
|---|---|
| Report | IR 05000237/2009005 Section 1R19 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | R Jickling C Moore C Phillips D Melendez Colon D Sand F Ramirez J Benjamin J Draper J Mcghee L Kozak M Holmberg M Mitchell M Ring |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Dresden - IR 05000237/2009005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Dresden) @ 2009Q4
Self-Identified List (Dresden)
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