05000390/FIN-2014004-03
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR Appendix R,Section III, G, Fire Protection and Safe Shutdown Capability, paragraph 3, states in part that Postulated Alternative or dedicated shutdown capability and its associated circuits, independent of cables, systems or components in the area, room, zone under consideration should be provided. Contrary to this requirement, since original construction until refueling outage RF12, in the spring of 2014, the licensee failed to meet the separation requirements of paragraph 2 of this part. Specifically, a postulated fire occurring in either of two fire areas could have resulted in the complete loss of reactor coolant pump seal cooling, resulting in a loss of coolant accident. Inspectors determined that this performance condition was more than minor because it adversely impacted the Initiating Events Cornerstone to limit the likelihood of events that upset plant stability and challenge critical safety functions during shutdown as well as power operations and performed a significance determination in accordance with IMC 609 Appendix F, phase I and II risk evaluation. The condition was determined to be of very low safety significance (Green) consistent with Task 2.7.5: Screening Check, because the CDF was less than or equal to 1E-6. This condition was captured in the licensees corrective action program as PER 809167. |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2014004 Section 4OA7 |
| Date counted | Sep 30, 2014 (2014Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | J Bartley J Hamman J Nadel K Miller R Hamilton R Monk R Rodriguez |
| Violation of: | 10 CFR 50 Appendix R Section III.G |
| INPO aspect | |
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Finding - Watts Bar - IR 05000390/2014004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2014Q3
Self-Identified List (Watts Bar)
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