05000259/FIN-2012003-04
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Finding | |
|---|---|
| Title | Failure to Establish Preventive Maintenance for Unit 2 and 3 Main Control Room Annunciator Power Supplies |
| Description | A self-revealing finding (FIN) was identified for the licensees failure to perform preventive maintenance on the Unit 3 Main Control Room (MCR) annunciator power supplies. As a result, a power supply failed which led to a fire in annunciator panel 3-X-55-5A in the Unit 3 control room. The licensee initiated actions to extinguish the fire, replace the two affected power supplies and develop a preventive maintenance program to replace the power supplies every ten years. Additional corrective actions to replace all power supplies that have been installed for more than four years are pending. This was captured in the licensees corrective action program as problem event report (PER) 496592. The performance deficiency was determined to be more than minor because it was considered sufficiently similar to example 4.f of Inspection Manual Chapter (IMC) 0612, Appendix E, for an issue that resulted in a fire hazard in a safety-related area of the plant. The finding was associated with the Initiating Events Cornerstone and required a phase 3 analysis in accordance with IMC 0609 because the finding increased the likelihood of, and actually caused, a fire in the Unit 3 control room. The phase 3 analysis determined that without an impact to additional plant equipment, or a major impact on human action failure rates, the finding was determined to be Green. The cause of this finding was related to the cross cutting aspect of Problem Identification in the Corrective Action Program component of the Problem Identification and Resolution area because the licensee should have recognized the electrolytic capacitors were installed beyond their recommended service life and scheduled replacement prior to their failure P.1(a). |
| Site: | Browns Ferry  |
|---|---|
| Report | IR 05000259/2012003 Section 4OA3 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | L Pressley C Dykes R Kellner C Stancil D Dumbacher R Hamilton E Guthrie M Speck M Coursey P Niebaum |
| CCA | P.1, Identification |
| INPO aspect | PI.1 |
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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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