The Orange County Register reports Southern California Edison can dispute the fine but issued a statement indicating it would accept the penalty, saying the event should not have happened and takes full responsibility.

The violations were a failure to have a backup system in case a fuel canister was dropped and failure to notify the commission within 24 hours after a canister was at risk of being dropped into an 18-foot-deep (5.5-meter-deep) bunker rather than being lowered.

From https://news.yahoo.com/california-utility-fined-handling-nuke-154252484.html