05000389/FIN-2015003-03
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Finding | |
|---|---|
| Title | Untimely 10 CFR50.72 Notification |
| Description | The NRC identified an NCV of 10 CFR 50.72(b)(3)(iv)(A) for the licensees failure to notify the NRC within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of an event that was not part of a preplanned sequence which resulted in a valid actuation of an emergency AC electrical power system. During Unit 2s refueling outage with Unit 2 in Mode 5 and the 2A emergency diesel generator (EDG) properly tagged out of service for pre-planned maintenance, a phase-to-phase fault on the 6.9kV non-segregated bus from the 2A startup transformer (SUT) to the non-safety related 2A1 bus caused the 1A and 2A SUTs supply breakers to open. The safety related 4.16kV 2A3 bus experienced an under voltage condition which generated a valid actuation signal for the 2A EDG. The licensee failed to recognize this event as reportable pursuant to 10 CFR 50.72(b)(3)(iv)(A). The licensee generated corrective actions (AR 2075703) which included restoring compliance within a reasonable period of time after the violation was identified, and training the appropriate personnel to understand why the situation was reportable pursuant to 10 CFR 50.72. The inspectors determined that the failure to report required plant events or conditions to the NRC had the potential to impede or impact the regulatory process. As a result, the NRC dispositioned this violation of 10 CFR 50.72 using the traditional enforcement process instead of the SDP. The inspectors determined that this issue was more than minor because it is similar to a Severity Level IV example provided in Section 6.9 of the NRC Enforcement Policy. Cross-cutting aspects are not assigned to traditional enforcement violations. |
| Site: | Saint Lucie  |
|---|---|
| Report | IR 05000389/2015003 Section 4OA3 |
| Date counted | Sep 30, 2015 (2015Q3) |
| Type: | TEV: Severity level IV |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | A Vargas C Thomas J Munday J Reyes S Sanchez T Hoeg T Morrissey |
| Violation of: | 10 CFR 50.72(b)(3)(iv)(A), System Actuation 10 CFR 50.72 |
| INPO aspect | |
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Finding - Saint Lucie - IR 05000389/2015003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Saint Lucie) @ 2015Q3
Self-Identified List (Saint Lucie)
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