05000482/FIN-2010005-11
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Finding | |
|---|---|
| Title | Inadequate Simulation Facility Fidelity |
| Description | The inspectors identified a noncited violation of 10 CFR 55.46(c)(1)(i), Simulator Fidelity, in that the licensees simulation facility did not have adequate fidelity to simulate steam generator level oscillations that occur during startup and shutdown after a loss of feedwater preheat, thereby creating the possibility for negative training. Specifically, two constants that are used in the model for the Westinghouse 7300 steam generator level control cards were improperly programmed in the simulator. The licensee changed the constants in the simulator model and initiated actions to ensure accurate low-power steam generator oscillation modeling. This issue was entered into the licensee\'s corrective action program as Condition Report 29541. The failure to have a properly modeled simulation facility is a performance deficiency. The performance deficiency is more than minor, 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 because the finding neither represents a loss of system safety function, nor does it 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 did not ensure the simulation facility was accurately modeling plant behavior. |
| Site: | Wolf Creek  |
|---|---|
| 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.1, Resources |
| INPO aspect | LA.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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