The Omaha Public Power District paid out nearly $1 million in severance and vacation benefits to seven employees who resigned from its Fort Calhoun nuclear power plant in eastern Nebraska _ well over the $400,000 the utility initially reported.

The payouts came when OPPD hired Chicago-based Exelon, the largest U.S. operator of nuclear power plants, in 2012 to run the troubled Fort Calhoun plant.

A Douglas County judge this week ordered OPPD to release the payout documents after a labor union sued to see them.

The documents show that former OPPD Chief Nuclear Officer David Bannister was paid nearly $256,000 in severance and more than $100,000 for unused vacation.

Several other employees who agreed to resign were paid nearly $600,000 in severance and unused vacation.