05000266/FIN-2015003-04
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | The licensee identified a finding of very low safety significance (Green) and an NCV of TS 3.8.9; Distribution SystemsOperating, Condition A, which required the licensee to immediately declare associated supported features inoperable for the 4.16 kV safeguards busses. Failure to implement this action subsequently required the licensee to place both units in mode 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. Contrary to the above, the licensee discovered that numerous occasions existed over the past three years where safetyrelated 4.16kV switchgear associated with B Train EDGs was inoperable due to the inoperability of the W-185A and W-185B, 1A-06 and 2A-06 Switchgear room fans, which were required support systems for the EDGs and associated switchgear. The inspectors evaluated the finding in accordance with IMC 0609, Significance Determination Process, and determined that the finding required a detailed risk evaluation which was performed by Region III SRAs. The SRAs gathered data from licensee GOTHIC model calculations, licensee engineering evaluations associated with the POR of the condition and the NRCs Standard Plant Analysis Risk model. Based on the SSCs being available for their respective 24-hour mission time(s), the SRAs determined that the increase in CDF for this issue was negligible and the delta risk is of very low safety significance (i.e., Green). The licensee reported this condition in LER 2015-004-00, which was closed in Section 4OA3 of this report. The licensees corrective actions included improving administrative and procedural controls for removing these fans from service and used lessons learned from this condition to implement corrective actions to improve procedural guidance for similar activities where ventilation systems may cause support system inoperabilities. |
| Site: | Point Beach  |
|---|---|
| Report | IR 05000266/2015003 Section 4OA7 |
| Date counted | Sep 30, 2015 (2015Q3) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | B Bartlett B Palagi D Oliver E Coffman J Cameron J Mancuso J Rutkowski K Barclay R Baker V Meyers |
| Violation of: | Technical Specification - Procedures Technical Specification |
| INPO aspect | |
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Finding - Point Beach - IR 05000266/2015003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Point Beach) @ 2015Q3
Self-Identified List (Point Beach)
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