OMAHA, Neb. (AP) – The Omaha Public Power District says it is already working to improve operations at its Fort Calhoun nuclear power plant. OPPD CEO Gary Gates says the utility is taking the Nuclear Regulatory Commission’s concerns seriously. The Nuclear Regulatory Commission said Tuesday that Fort Calhoun will receive more oversight as a result of the regulatory violations found in the past couple years. Both OPPD and the NRC said the concerns at Fort Calhoun don’t represent a threat to public safety. A team of OPPD officials starting looking for ways to improve Fort Calhoun’s operations earlier this year. The utility said some of those changes have already been made, but some measures have been delayed while the plant was shut down this summer because of flooding.