05000331/FIN-2012002-05
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Finding | |
|---|---|
| Title | Secondary Containment Airlock Door Interlock System Conditions Adverse to Quality Not Promptly Corrected |
| Description | A finding of very low safety significance and associated NCV of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, was identified by the inspectors on February 21, 2012, for the licensees failure to promptly correct secondary containment (SCT) airlock door interlock system conditions adverse to quality. Specifically, the inspectors identified several instances during 2010 and 2011 where the licensee did not adequately correct interlock system conditions resulting in simultaneous opening of SCT airlock doors. For each occurrence, the interlock system conditions resulted in unplanned inoperability of secondary containment and entries into short-term limiting condition for operation (LCO) action statements. The licensee entered the inspectors concerns into the CAP as CR 01716446 and CR 01737495, and was in the process of performing a condition evaluation and apparent cause evaluation. The inspectors determined that the licensees failure to promptly correct SCT airlock door interlock system conditions adverse to quality represented a performance deficiency. The performance deficiency was determined to be more than minor and a finding because, if left uncorrected, failing to promptly correct conditions adverse to quality would have the potential to lead to a more significant safety concern. The inspectors evaluated the finding in accordance with IMC 0609.04, Table 4a. Because the inspectors answered No to all questions under the Containment Barrier column, the finding screened as very low safety significance (Green). The inspectors determined that the contributing cause that provided the most insight into the performance deficiency was associated with the cross-cutting aspect of Human Performance, having Decision Making components, and involving the licensee making safety-significant or risk-significant decisions using a systematic process, especially when faced with uncertain or unexpected plant conditions, to ensure safety is maintained. |
| Site: | Duane Arnold  |
|---|---|
| Report | IR 05000331/2012002 Section 4OA2 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Orlikowski T Bilik M Mitchell M Ring L Haeg K Walton J Draper R Murray S Bell |
| CCA | H.13, Consistent Process |
| INPO aspect | DM.1 |
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Finding - Duane Arnold - IR 05000331/2012002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Duane Arnold) @ 2012Q1
Self-Identified List (Duane Arnold)
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