05000443/FIN-2013005-01
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR Part 50.65, paragraph a(4), Requirement for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants, states, in part, that the licensee shall assess and manage the increase in risk that may result from the proposed maintenance activities. NextEra procedure WM 10.1. On-Line Maintenance, Section 3.3.1, requires that an evaluation of the risk impact of planned maintenance tasks be performed. Contrary to the above, on September 24, 2012, NextEra failed to adequately assess and manage the impact to plant risk during a planned maintenance activity. Specifically, NextEra identified during internal reviews that they had failed to recognize an elevated online maintenance risk level (Yellow) during the performance of the 1-EDE-B-1-B Battery Service Test due to incorrect coding in NextEras PRAX risk model program. The inspectors determined NextEras failure to assess and manage risk during the period when the Battery Service Test was reasonably within NextEras ability to foresee and correct, and was identified as a performance deficiency. This performance deficiency is more than minor, and considered a finding, because it is associated with the Mitigating Systems cornerstone attribute of equipment performance and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Because this finding represents a violation of 10 CFR Part 50.65 Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants, Section a(4), the inspectors used IMC 0609, Appendix K, Flowchart 1 Assessment of Risk Deficit, to analyze the finding. The regional Senior Reactor Analyst determined the incremental core damage probability (ICDP) for the surveillance period (~5-10 minutes) to be several orders of magnitude below the 1E-6 threshold due to the short duration of the systems unavailability. As this finding is not related to Risk Management Actions only, and the ICDP Risk Deficit is not >1E-6, the inspectors determined that the finding is of very low safety significance (Green). The issue was entered into NextEras CAP as AR 1906782. |
| Site: | Seabrook  |
|---|---|
| Report | IR 05000443/2013005 Section 4OA7 |
| Date counted | Dec 31, 2013 (2013Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | B Dionne C Newport D Silk G Dentel J Gilliam P Cataldo W Cook |
| Violation of: | 10 CFR 50.65 |
| INPO aspect | |
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Finding - Seabrook - IR 05000443/2013005 | |||||||||||||||||||||||||||||||||||||||||||
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Finding List (Seabrook) @ 2013Q4
Self-Identified List (Seabrook)
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