05000482/FIN-2010002-05
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Finding | |
|---|---|
| Title | Failure to Follow Procedure for a Main Feed Pump Trip |
| Description | The inspectors identified a Green noncited violation of Technical Specification 5.4.1.a, Procedures, for the failure of Wolf Creek control room personnel to follow procedures for a main feedwater pump trip. During a review of the post trip data and operator statements, the inspectors noted that control room operators took manual control and reset main feedwater Pump A, which was not in accordance with station procedures. This issue was entered into the licensee\'s corrective action program as Condition Report 24011. This finding was greater than minor because it was associated with the Mitigating Systems Cornerstone attribute of human performance and it affected the objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). The inspectors evaluated the significance of this finding using Inspection Manual Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, and screened the finding to Phase 2 because the finding represents a loss of auxiliary feedwater actuation system safety Function g. The finding screened to Phase 3 because of the failure to start of both motor-driven auxiliary feedwater pumps. The senior reactor analyst performed a Phase 3 analysis and concluded that the finding was Green because the probability of an initiator occurring within any 10-second exposure time is approximately 3E-7. Additionally, auxiliary feedwater pumps would have been automatically started on lo-lo steam generator level if required. The inspectors also determined that the cause of the finding has a crosscutting aspect in the area of problem identification and resolution associated with operating experience because Wolf Creek failed to communicate relevant operating experience to affected internal stakeholders |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2010002 Section 4OA3 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | G Guerra D Dumbacher J Melfi G Miller C Long C Peabody J Groom |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Wolf Creek - IR 05000482/2010002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2010Q1
Self-Identified List (Wolf Creek)
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