05000483/FIN-2010002-01
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Finding | |
|---|---|
| Title | Failure to Follow Operability Determination Procedure |
| Description | The NRC identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures and Drawings, for failure to follow Procedure APA-ZZ-00500, Appendix 1, Operability and Functionality Determinations. The inspectors determined that the licensee failed to provide a reasonable expectation of operability for the degraded condition. Specifically, the licensee failed to account for both auxiliary feedwater as an essential service water system load and fouling resistance in the component cooling water system heat exchanger. Long term corrective actions planned include a modification of the component cooling water heat exchangers divider plate during the upcoming April 2010 refueling outage. The licensee placed this issue in their corrective action program as Callaway Action Request 201001152. This finding was determined to be greater than minor because it impacted the Mitigating Systems Cornerstone attribute of human performance and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using Manual Chapter 0609.04, Phase 1 Initial Screening and Characterization of Findings, this issue screened as very low safety significance because it was not a design or qualification deficiency that resulted in a loss of operability or functionality, did not create a loss of system safety function of a single train for greater than the technical specification allowed outage time and did not affect seismic, flooding, or severe weather initiating events. This finding has a crosscutting aspect in the area of human performance associated with the decision making component because the licensee failed to use conservative assumptions when performing operability evaluations H.1(b) |
| Site: | Callaway  |
|---|---|
| Report | IR 05000483/2010002 Section 1R15 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | D Dumbacher P Elkmann G Replogle G Miller J Groom |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Callaway - IR 05000483/2010002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Callaway) @ 2010Q1
Self-Identified List (Callaway)
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