Cory Rogers, 24, a technician at the Progress Energy plant was killed while performing maintenance on the unit.
Officials say there was not a major fire at the plant and no evacuations were issued for the surrounding area.
The 600-megawatt Sutton Plant includes three coal units built in 1954, 1955 and 1972.
In 2009, Progress Energy announced its plan to retire the Sutton Plant's three coal-fired units and build a 620-MW combined-cycle power plant at the Sutton site. The new plant is scheduled to begin operating in 2014.