05000387/FIN-2012005-01
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Finding | |
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| Title | FAILURE TO DEMONSTRATE EFFECTIVE PREVENTIVE MAINTENANCE UNDER 50.65(a)(2) |
| Description | Inspectors identified a Green NCV of 10 CFR 50.65(a)(2) for PPL staff not demonstrating that the performance of the Unit 2 125 volt direct-current (VDC) system was being effectively controlled through appropriate preventive maintenance. Specifically, PPL did not properly classify a functional failure of the Unit 2 125 VDC system on November 23, 2011 as maintenance preventable until prompted by questions from the inspectors. Consequently, PPL staff declared the functional failure as maintenance preventable, determined a maintenance rule performance criteria was exceeded and moved the Unit 2 125 VDC system from a(2) to (a)(1) status in order to establish goals and monitoring as required by 10 CFR 50.65. PPL staff entered this issue in their CAP as CRs 1496655 and 1643158. This finding was more than minor because it was associated with the Equipment Performance attribute of the Mitigating System cornerstone, and adversely affected the cornerstone objective of ensuring the availability, reliability and capability of systems that respond to initiating events to prevent undesirable consequences. Additionally, this finding was similar to example 7.d of IMC 0612, Appendix E. Using Section A of Exhibit 2 of NRC IMC 0609 Appendix A, The Significance Determination Process (SDP) for Findings At- Power, inspectors determined this finding was of very low safety significance (Green) because the finding did not represent an actual loss of function of one or more non-TS trains of equipment designated as high safety-significant in accordance with PPLs maintenance rule program for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The inspectors determined that this finding had a cross-cutting aspect in the area of Problem Identification and Resolution (PI&R), CAP, because PPL staff did not thoroughly evaluate the Unit 2 125 VDC system functional failure such that the resolution addressed the cause to include proper classification. The inspectors determined that PPL staff not thoroughly evaluating the maintenance preventable aspects of a functional failure was due to the CAP process evaluation not fully addressing the cause such that appropriate classification under the maintenance rule could be made |
| Site: | Susquehanna  |
|---|---|
| Report | IR 05000387/2012005 Section 1R12 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Bolger A Rosebrook C Lally J Caruso J Furia J Greives J Richmond M Gray P Finney R Edwards R Rolph |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Susquehanna - IR 05000387/2012005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Susquehanna) @ 2012Q4
Self-Identified List (Susquehanna)
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