The troubled Fort Calhoun nuclear power plant is inching closer toward generating power for the first time since April 2011, but federal regulators say the utility still has significant work to do before they’ll allow the plant to restart.

The Nuclear Regulatory Commission issued a 48-page-long checklist this week listing everything the Omaha Public Power District must address.

The checklist includes policy reviews, training exercises and plant equipment upgrades. Some items are completed, but many remain blank.

OPPD spokesman Jeff Hanson says the utility has made significant progress, but the plant won’t restart until regulators know it’s safe.

Fort Calhoun sits 20 miles north of Omaha. It initially shut down for refueling maintenance, but flooding along the Missouri River and a series of safety violations forced it to stay closed.