GREENVILLE, South Carolina, Aug. 3 -- Duke Energy issued the following news release: * * * Fuel costs for customer needs nearly doubled over the past two years Company acts to insulate customers from fuel-price swings Also connects customers to financial assistance and cost-saving tools * * * Duke Energy Carolinas is seeking to recover costs for the fuel used to generate electricity for South Carolina homes and businesses. If approved by the Public Service Commission of South Carolina (PSC  more