An
URI was identified to determine if a performance deficiency exists regarding the adequacy of the licensees maintenance program to detect substantial degradation of cables and their connections used on the stations large oil filled stationary transformers. Description The inspectors developed an issue of concern related to the adequacy of the licensees maintenance program to detect substantial degradation of cables and their connections used on the stations large oil filled stationary transformers. The inspectors noted that all inspections required by the licensees surveillance and preventative maintenance programs used unaided visual inspections of
bushings, surge arrestors, cable connections, T-connections, and cables on the stations large oil filled stationary transformers. The inspectors noted that the licensees metallurgical report associated with the failed power cable from the Unit 3 startup transformer identified degradation which likely occurred over a lengthy period of time. The inspectors determined that the following inspection activities should be pursued to determine if a performance deficiency exists: Review of the licensees completed cause determination Review of any additional testing and metallurgical reports Review of any license event report submitted by the licensee Review of requirements associated with emergency
AC power paths and associated transformers This issue is identified as
URI 05000269, 287/2016008-01, Potential lack of adequacy of the licensees maintenance program to detect substantial degradation of cables and their connections used on Oconee large oil filled stationary transformers.
