05000455/FIN-2011016-01
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Finding | |
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| Title | |
| Description | The inspector identified a finding of very low safety significance when licensee personnel failed to perform an adequate extent of cause review in the root cause evaluation for the 2A EDG lube oil cooler leak. Specifically, the root cause evaluation identified that the root cause for the White finding was the absence of a formal, structured process to ensure that EPRI documents were reviewed to capture good work practices. However, the extent of cause review performed by the licensee was narrow in scope and did not include other potentially vulnerable programs other than that which affected the EDG lube oil cooler (i.e. the leakage reduction series publications). The licensee entered this issue into their corrective action program in an effort to define an appropriate scope for a supplemental extent of cause evaluation effort. The inspector concluded the finding was more than minor because if left uncorrected it could become a more significant safety concern. Specifically, the licensees stated root cause of not having a formal process in place to incorporate EPRI documents from the Sealing Technology and Plant Leakage Reduction Series, which led to an inoperable EDG, could also impact other programs or processes. However, the potential impact of the identified root cause on other programs or processes were not reviewed as part of the licensees extent of cause review effort. The inspector determined the finding could be evaluated using the SDP in accordance with IMC 0609, Significance Determination Process, Attachment 4, Phase I - Initial Screening and Characterization of Findings, Table 4a for the Mitigating Systems Cornerstone and answered No to the Mitigating Systems Cornerstone questions. Therefore, the finding screened as having very low safety significance (Green). The finding had an associated cross-cutting aspect in the Self and Independent Assessments component of the Problem Identification and Resolution cross-cutting area, because the licensees assessment on the readiness for the NRC Supplemental Inspection failed to recognize the weakness in the extent of cause discussion. |
| Site: | Byron  |
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| Report | IR 05000455/2011016 Section 4OA4 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 95001 |
| Inspectors (proximate) | T Taylor E Duncan |
| CCA | P.6, Self-Assessment |
| INPO aspect | CL.2 |
| Finding closed by | |
| IR 05000454/2011016 (4 October 2011) | |
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Finding - Byron - IR 05000455/2011016 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2011Q3
Self-Identified List (Byron)
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