KNOXVILLE, Tenn. (AP) - The Tennessee Valley Authority has appointed Joseph Grimes as chief nuclear officer.

According to the utility, Grimes will be based in Chattanooga and will be responsible for leading, operating and optimizing TVA's nuclear fleet.

Grimes has more than 30 years of experience in operations, maintenance and engineering management and support of nuclear generating stations.

Grimes currently is senior vice president of Engineering and Technical Services for Exelon Nuclear. He will replace Preston Swafford, who is retiring.

TVA is the nation's largest public utility. It provides power to about 9 million people in Alabama, Georgia, Kentucky, Mississippi, North Carolina, Tennessee and Virginia.

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