There was a failure to properly maintain electrical equipment at Cooper Nuclear Station in Brownville, NE.
That means the Nuclear Regulatory Commission (NRC) will meet with Nebraska Public Power District (NPPD) officials Nov. 7 to discuss the preliminary inspection finding.
Inspectors found the nuclear plant had failed to ensure insulation on electrical equipment was properly maintained, according to an NRC report.
Degradation of the insulation resulted in a short circuit that led to the loss of one of two required off-site power supplies for the plant on Jan. 17. Plant workers have since replaced the damaged equipment.
No decision on the final safety significance of the finding or any additional NRC actions will be made at the conference. That decision will come at a later time.
The NRC evaluates regulatory performance at commercial nuclear plants with a color-coded process that classifies inspection findings as green, white, yellow or red in order of increasing safety significance. The NRC found this incident warranted a white level, low to moderate safety significance, which may require additional inspections, regulatory actions and oversight.