05000285/FIN-2010006-01
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Finding | |
|---|---|
| Title | Failure to Correct Repeated Tripping of the Turbine-driven Auxiliary Feedwater Pump FW-10 |
| Description | A self-revealing noncited violation of 10 CFR 50 Appendix B, Criterion XVI, Corrective Action, occurred for the licensees failure to assure that a condition adverse to quality was corrected. Specifically, five instances were identified where the licensee failed to correct an adverse configuration
design which allowed the turbine-driven auxiliary feedwater pump FW-10 exhaust backpressure trip reset lever to be bumped and unlatched which would have prevented the pump from starting when required. The failure to correct this adverse condition resulted in the turbine-driven auxiliary feedwater pump reset lever becoming unlatched and causing the pump to trip off during a urveillance test start attempt on February 17, 2010. The licensee entered this issue in their corrective action program as Condition Report CR-2010-0813. The finding is more than minor because it is associated with the equipment performance attribute of the Mitigating Systems Cornerstone, and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events. Using Manual Chapter 0609.04, \"Phase 1 Initial Screening and Characterization of Findings,\" the issue screened as potentially risk significant since the finding represented a loss of system safety function of a single train for greater than the technical specification allowed outage time. The finding required a Phase 2 analysis. When evaluated per Manual Chapter 0609, Appendix A, \"Determining the Significance of Reactor Inspection Findings for At-Power Situations,\" and the Fort Calhoun Phase 2 presolved table item, Turbine-driven Auxiliary Feedwater Pump Fails to Start, the inspectors determined this finding to be potentially risk significant. A Phase 3 analysis was performed and it was determined that the finding was of very low risk significance. This finding has a crosscutting aspect in the area of problem identification and resolution associated with the corrective action program component because the licensees periodic trends and assessments did not recognize the significance of precursor events related to bumping the reset lever and prompt action to prevent further problems with the turbine-driven auxiliary feedwater pump FW-10. |
| Site: | Fort Calhoun  |
|---|---|
| Report | IR 05000285/2010006 Section 4OA5 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 93812 |
| Inspectors (proximate) | J Kirkland D Loveless L Willoughby J Clark M Chambers J Wingebach M Williams |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | P.4, Trending |
| INPO aspect | PI.4 |
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Finding - Fort Calhoun - IR 05000285/2010006 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Fort Calhoun) @ 2010Q2
Self-Identified List (Fort Calhoun)
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