Inspectors are going to be assessing the degradation of power cables on startup transformers for two of the plant's three units.
A plant operator making routine inspections last month discovered a disconnected cable that should have been connected to a startup transformer on Unit 3. The NRC says cables on another unit were also degraded.
Officials say all the cables have been repaired, and the transformers are available for use if needed.
The inspectors say they'll issue a report within 45 days.