05000482/FIN-2010005-08
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Finding | |
|---|---|
| Title | Inadequate Procedures for Establishing Feedwater Preheat |
| Description | The inspectors identified a noncited violation of Technical Specification 5.4.1.a, Procedures, for Wolf Creek Procedures GEN 00-003, Hot Standby to Minimum Load, and SYS AE-200, Feedwater Preheating During Plant Startup and Shutdown, being inadequate by failing to require maximum feedwater preheating. This could lead to a reactor trip caused by steam generator level oscillations attributable to low feedwater temperature. This was a contributing factor in the October 17, 2010, reactor trip. A temporary change was made to the procedures that cautioned operating crews to maintain maximum feedwater preheating. This issue was entered in the licensees corrective action program as Condition Reports 29845 and 29846. The inadequate procedural direction to establish maximum feedwater preheating is a performance deficiency. The performance deficiency is more than minor, therefore a finding, because it is associated with the Initiating Events Cornerstone attribute of procedure quality and it affects the objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. The inspectors evaluated the significance of this finding using Inspection Manual Chapter 0609.04. This finding was determined to be of very low safety significance since the finding contributed to the likelihood of a reactor trip; however, it did not contribute to the likelihood that mitigation equipment or functions would not be available. This finding had a crosscutting aspect in the area of problem identification and resolution associated with the operating experience component because Wolf Creek failed to institutionalize internal and external operating experience by changing plant procedures. |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2010005 Section 4OA3 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | G Apger J Groom B Correll N Greene T Farina W Strickland K Clayton D Stearns L Carson D Allen J Adams C Long C Peabody |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Wolf Creek - IR 05000482/2010005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2010Q4
Self-Identified List (Wolf Creek)
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