05000390/FIN-2013002-04
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR 50 Appendix B, Criterion III, Design Control, states in part that design changes, including field changes, shall be subject to design control measures commensurate with those applied to the original design. Contrary to this requirement, the licensee did not assure configuration control was maintained on the inputs from two of the nuclear instrumentation channels to the rod control system. On January 15, 2013, during performance of procedure IMI-92.017, Calibration of NIS Power Range High Flux Auctioneer, in accordance with WO 112727523, instrument technicians found that inputs from nuclear instrumentation channels N41 and N42 were not present as expected. Investigation by the licensee determined that the associated wiring was lifted during the recent refueling outage as part of Design Change Notice (DCN) 52853, Stage 8, in a WO, but that the WO contained no steps to re-install the wiring. No post maintenance was performed. This low safety significant adverse condition was captured in the licensees corrective action program as PER 695891. |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2013002 Section 4OA7 |
| Date counted | Mar 31, 2013 (2013Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | R Monk S Shaeffer K Miller |
| Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control |
| INPO aspect | |
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Finding - Watts Bar - IR 05000390/2013002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2013Q1
Self-Identified List (Watts Bar)
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