05000456/FIN-2013002-08
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Title 10 CFR Part 50.65(a)(4), Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants, requires, in part, that before performing maintenance activities (including but not limited to surveillance, post-maintenance testing, and corrective and preventive maintenance), the licensee shall assess and manage the increase in risk that may result from the proposed maintenance activities. The scope of the assessment may be limited to SSCs that a risk-informed evaluation process has shown to be significant to public health and safety. Contrary to the above, on January 24, 2013, the licensee failed to properly assess and manage the increase in risk from Unit 2 maintenance activities involving the unavailability of the motor-driven fire pump and Unit 2 exhaust building vent fans. Specifically, the licensee assumed the risk configuration was Green based upon a conversation with a licensee expert; however, the licensees formal assessment concluded that the risk configuration should have been elevated to Yellow. The inspectors determined that this issue was of very low safety significance (Green) after reviewing IMC 0609, Appendix K, Maintenance Risk Assessment and Risk Significance Determination Process Assessment . Specifically, the increase in risk was evaluated to be less that E-6 for ICDP and less than E-7 for ILERF. The licensee entered this issue into their CAP as IR 1467237, Online Risk Status Inappropriately Changed to Green. |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2013002 Section 4OA7 |
| Date counted | Mar 31, 2013 (2013Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Garmoe E Duncan J Benjamin M Holmberg M Perry R Jickling R Ng T Daun |
| Violation of: | 10 CFR 50.65(a)(4) 10 CFR 50.65 |
| INPO aspect | |
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Finding - Braidwood - IR 05000456/2013002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2013Q1
Self-Identified List (Braidwood)
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