05000387/FIN-2011004-04
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Finding | |
|---|---|
| Title | Inadequate Operability Assessment of Safety Relief Valve Seat Leakage |
| Description | An NRC-identified Green NCV of 10 CFR 50, Appendix B, Criterion V, instructions, Procedures, and Drawings, was identified when PPL did not perform an adequate operability assessment in accordance with procedure NDAP-QA-0703, Operability Assessments and Requests for Enforcement Discretion, Revision 15, to ensure the continued operability of the \'M\' safety relief valve (SRV). Upon identification, operators initiated an Operability Follow-up Request which ultimately resulted in the\'M\' SRV being declared inoperable. The finding was more than minor because it was similar to example 3.j in IMC 0612 Appendix E, Examples of Minor lssues in that an error in a calculation is not minor if the error results in reasonable doubt on the operability of the system or component. In this case, the error made in evaluating the operability of the SRV resulted in reasonable doubt of operability. The finding was evaluated for significance using IMC 0609, Attachment 4, Phase 1 - initial Screening and Characterization of Findingl. Since the finding was not a design or qualification deficiency, did not result in a loss of system safety function, did not result in loss of a single train for greater than its allowed outage time, and was not potentially risk significant due to external events, the finding was determined to be of very low safety significance (Green). This finding was related to the cross-cutting area of Problem identification and Resolution (Pl&R) - CAP because PPL did not thoroughly evaluate problems such that the resolutions address the causes and extent of conditions, to include properly classifying, prioritizing and evaluating for operability. Specifically, ppl failed to consider the effect that seat leakage had on the lift point of the ;M\' SRV and failed to correctly assess the SRV for operability. |
| Site: | Susquehanna  |
|---|---|
| Report | IR 05000387/2011004 Section 1R15 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | A Rosebrook E Burket J Greives M Orr P Finney P Krohn S Pindale |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Susquehanna - IR 05000387/2011004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Susquehanna) @ 2011Q3
Self-Identified List (Susquehanna)
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