05000387/FIN-2010004-08
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | On August 19, 2010, PPL identified that the risk profile erroneously indicated that the equipment out-of-service (EOOS) risk for both units was green. Upon further review, it was identified that the EOOS status should have been yellow for both units due to the A EDG ventilation supply fan being unavailable. PPL determined that, with the fan out-of-service (OOS) and the diesel running, room temperature could reach 120 degrees F in about three minutes. This issue was determined to be a violation of 10 CFR 50.65 (a)(4), for failure to ensure emergent work was properly modeled and evaluated for online plant risk. This finding is more than minor because it is similar to example 7.e. in NRC IMC 0612 Appendix E, Examples of Minor Issues. This example states, in part, that failure to perform an adequate risk assessment when required by 10 CFR 50.65 (a)(4) is not minor if the overall elevated plant risk would put the plant into a higher licensee established risk category. This finding was evaluated using IMC 0609, Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process. In accordance with flow chart 1, the finding was determined to be Green since the risk deficit did not exceed the threshold for incremental core damage probability or incremental large early release probability. The issue was entered into PPL\'s CAP as CR 1294583. |
| Site: | Susquehanna  |
|---|---|
| Report | IR 05000387/2010004 Section 4OA7 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Rosebrook D Molteni J Furia J Greives P Finney P Krohn R Mckinley |
| INPO aspect | |
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Finding - Susquehanna - IR 05000387/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Susquehanna) @ 2010Q3
Self-Identified List (Susquehanna)
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