05000321/FIN-2010005-01
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Finding | |
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| Title | LICENSEE-IDENTIFIED Violation |
| Description | A licensee-identified violation of 10 CFR 50.65(a)(4) occurred on October 12, 2010. 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 the proposed maintenance activities. Contrary to this requirement, between October 3, 2010 and October 12, 2010 the licensee failed to include work order 2039000240 maintenance activities on component 2R22-S006 frame 2 in the sites risk calculations. This resulted in an inadequate risk calculation that should have predicted a higher risk level on October 12, 2010 when maintenance activities were also performed on the 2D start-up transformer. The combination of 2R22-S006 frame 2 and the 2D start-up transformer being unavailable should have resulted in the licensee predicting Yellow risk, whereas the licensees evaluation not including 2R22-S006 frame 2 only resulted in Green risk. This violation was identified by the licensee during risk review by the operations shift and was documented in CR 2010113237. This violation screened as Green utilizing Inspection Manual Chapter (IMC) 0609 Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process Flowchart 1, Assessment of Risk Deficit, because the incremental core damage probability deficit was less than 1E-6 and the incremental large early release probability deficit was less than 1E-7. |
| Site: | Hatch  |
|---|---|
| Report | IR 05000321/2010005 Section 4OA7 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | S Shaeffer B Caballero E Morris J Beavers C Dykes D Hardage |
| INPO aspect | |
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Finding - Hatch - IR 05000321/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Hatch) @ 2010Q4
Self-Identified List (Hatch)
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