05000482/FIN-2010005-10
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Finding | |
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Title | Inadequate Procedure for Steam Generator Hi-Hi Turbine Trip |
Description | The inspectors identified a noncited violation of Technical Specification 5.4.1.a, Procedures, for Wolf Creek Procedure ALR 00-112A, Steam Generator Level Hi-Hi Turbine Trip, being inadequate when reactor power exceeds the capabilities for the auxiliary feedwater system to maintain adequate steam generator inventory after P-14 actuation. This contributed to the operators attempt to perform a controlled shutdown instead of a reactor trip, thereby causing an automatic reactor trip. The licensee incorporated guidance in their startup training to trip the reactor when inadequate feedwater flow exists after P-14 actuation. This issue was entered into the licensee\'s corrective action program as Condition Report 29540. The inadequate procedural direction after P-14 actuation is a performance deficiency. The performance deficiency is more than minor, and therefore a finding, because it is 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. This finding was determined to be of very low safety significance since the finding does not represent a loss of system safety function, nor does the finding represent actual loss of safety function for single train for a greater time than permitted by technical specifications. This finding had a crosscutting aspect in the area of human performance associated with the resources component because Wolf Creek failed to validate that the procedure would be successful in stabilizing the plant. |
Site: | Wolf Creek |
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Report | IR 05000482/2010005 Section 4OA3 |
Date counted | Dec 31, 2010 (2010Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
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 | H.7, Documentation |
INPO aspect | WP.3 |
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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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