(Reuters) - Omaha Public Power District's 479-megawatt Fort Calhoun nuclear power plant in Nebraska was closed on Monday after 43 years of service.

The public electric utility said in a statement that personnel would power down the plant for the last time and begin the defueling process on Monday.

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In May, the utility's Chief Executive Officer Tim Burke told its board that continued operation of the aging reactor was not in the company's long-term financial interests due in part to weak power prices related to low cost renewable and natural gas-fired generation resources.

Fort Calhoun entered service in 1973.

(Reporting by Harshith Aranya in Bengaluru)