05000259/FIN-2011002-06
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Unit 3 Technical Specification 5.4.1.a. required that written procedures recommended in RG 1.33, Revision 2, Appendix A, shall be established, implemented, and maintained. Procedures for performing maintenance on safety related equipment were specifically listed as recommended procedures by Section 9 of Regulatory Guide 1.33, Appendix A. Preventive maintenance procedure EPI-0- 000-BKR15, 4KV Wyle/Siemens Horizontal Vacuum Circuit Breaker (Type-3AF) and Compartment Maintenance, was established in part to specifically inspect the rubber bumper located on the MJ (52STA) switch actuator for damage/indention that would reduce the amount of travel of the MJ switch when the breaker was actuated. Contrary to this, the licensee determined that preventive maintenance was not performed on 3ED 4KV Shutdown Board Normal Feeder Breaker 1342 within the required six year periodicity, and was deferred an additional two years without adequate technical justification. On February 10, 2011, while performing thermography on the 3ED 4KV Shutdown Board, the licensee identified several deenergized relays resulting from unmade contacts due to age-related wear on the MJ switch actuation arm rubber bumper which would have prevented an automatic start of 3D Residual Heat Removal (RHR), 3D Core Spray (CS), and D1 RHR Service Water (RHRSW) Pumps. This finding was entered into the licensees CAP as PER 324038 and PER 322640 for the associated cause analysis. The finding was determined to be of very low safety significance because it did not constitute a total loss of system or train safety function since the pumps would have automatically started with the diesel generator supplying the electric board and manually started regardless of the electrical source. Therefore, Train D RHR and CS safety functions would have been available during a design accident condition. |
| Site: | Browns Ferry  |
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| Report | IR 05000259/2011002 Section 4OA7 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Nielsen C Dykes C Fletcher C Stancil E Guthrie L Pressley M Coursey P Higgins P Niebaum R Hamilton R Patterson S Walker T Ross |
| INPO aspect | |
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Finding - Browns Ferry - IR 05000259/2011002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2011Q1
Self-Identified List (Browns Ferry)
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