The Omaha Public Power District  plans to using any insurance payouts related to the shutdown at the Fort Calhoun nuclear power plant to adjust customer rates. The board made the decision on Thursday. The plant initially was shut down for routine maintenance, but the Missouri River flooding in 2011 and several regulatory violations have forced it to remain offline. The insurance claim was $39 million and a partial settlement of $12.6 million has been reached so far.  An OPPD spokesman says it's hoped the full claim amount will be settled by the end of October.