05000327/FIN-2015007-03
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Finding | |
|---|---|
| Title | Failure to request a licensee amendment prior to removing interlocks from shared onsite emergency and shutdown AC electric systems |
| Description | The inspectors identified a SLIV violation of 10CFR 50.59.c.(2).ii, Changes, tests and experiments, for the licensees failure to obtain a license amendment prior to implementing a change to the onsite emergency and shutdown AC electric systems supplying the shared Essential Raw Cooling Water (ERCW) systems. The change removed the kirk key interlocking system from the tie breakers that originally prevented an operator error that would parallel the Unit 1A and Unit 2A 480V AC motor control centers (MCCs). The issue was entered into the licensees corrective action program as CR 1076179. The licensee has administrative controls in place to limit the risk of this configuration pending determination of corrective actions. The inspectors determined that the performance deficiency was more than minor because there was a reasonable likelihood that the change required Commission review and approval prior to implementation and the failure to request approval impacted the regulatory process. Specifically, the departure from acceptance criteria identified in IEEE 308, RG 1.81, and RG 1.6 more than minimally increased the likelihood of occurrence of an ERCW power train malfunction. |
| Site: | Sequoyah  |
|---|---|
| Report | IR 05000327/2015007 Section 1R17 |
| Date counted | Sep 30, 2015 (2015Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.17 |
| Inspectors (proximate) | D Terry-Ward J Bartley P Carman R Bennett T Fanelli |
| Violation of: | 10 CFR 55.59 |
| INPO aspect | |
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Finding - Sequoyah - IR 05000327/2015007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Sequoyah) @ 2015Q3
Self-Identified List (Sequoyah)
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