05000259/FIN-2012003-01
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Finding | |
|---|---|
| Title | Failure to Maintain Flood Barrier Results in Inoperable Safety Related Pumps |
| Description | An NRC-identified non-cited violation (NCV) of the Technical Specifications 5.4.1.a was identified for the licensees failure to maintain an Emergency Equipment Cooling Water (EECW) pump flood barrier in accordance with written procedures which resulted in the inoperability of two other safety related pumps. The licensee immediately restored the flood protection configuration of the C Residual Heat Removal Service Water (RHRSW) pump room by properly re-installing the flood protection cover and permanently stenciled the aluminum plate with the required procedure for installation. The licensee entered this issue into their corrective action program as PER 532050. The finding was more than minor because it was associated with the Mitigating Systems cornerstone attribute of Protection Against External Events, and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of RHRSW pumps to perform their intended safety function during a design basis flooding event. Specifically, the improper re-installation of an external flood protection cover resulted in the inoperability of two Residual Heat Removal Service Water (RHRSW) pumps. The significance of this finding was evaluated in accordance with the IMC 0609 Attachment 4, Phase 1- Initial Screening and Characterization of Findings, which required a Phase 3 analysis because the finding involved the degradation of equipment designed to mitigate a flooding event and it was risk significant due to external initiating event core damage sequences. The finding was determined to be Green because of the short exposure time, and the low likelihood of the flood. The cause of this finding was directly related to the cross cutting aspect of Supervisory Oversight in the Work Practices component of the Human Performance area, because of the foremans assumption that workers knew to restore the flood protection cover to meet procedural requirements without a formal pre-job brief H.4(c). |
| Site: | Browns Ferry  |
|---|---|
| Report | IR 05000259/2012003 Section 1R15 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | L Pressley C Dykes R Kellner C Stancil D Dumbacher R Hamilton E Guthrie M Speck M Coursey P Niebaum |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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Finding - Browns Ferry - IR 05000259/2012003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2012Q2
Self-Identified List (Browns Ferry)
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