Finding | |
|---|---|
| Title | None |
| Description | 10 CFR 50.65(a)(4) requires, in part, that before performing maintenance activities, the. licensee shall assess and manage the increase in risk that may result from proposed maintenance activities. Contrary to the above, on January 3, 2011, Entergy did not adequately assess and manage the increase in risk due to proposed emergent maintenance activities. This resulted in a non-conservative risk assessment and failure to take all of the appropriate risk management actions for the actual plant conditions. Entergy identified this after the emergent maintenance activities had been completed, and entered the issue into their corrective action program (CR-VTY-2011-00028) to evaluate for appropriate corrective actions. The finding is more than minor because it is similar to IMC 0612, Appendix E, Example 7.e; in that, the overall elevated plant risk put the plant in a higher licensee-established risk category. The finding was evaluated using IMC 0609 Appendix K, \"Maintenance Risk Assessment and Risk Management Significance Determination Process,\" and was determined to be of very low safety significance (Green) because the Incremental Core Damage Probability Deficit between the actual plant conditions and the incorrect risk assessment for the duration of the activity was less than 1.0 E-6 (approximately 3.3 E-9) |
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
|---|---|
| Report | IR 05000271/2011002 Section 4OA7 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | D Jackson D Spindler S Rich |
| INPO aspect | |
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Finding - Vermont Yankee - IR 05000271/2011002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Vermont Yankee) @ 2011Q1
Self-Identified List (Vermont Yankee)
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