Landahl, chief operating officer and senior vice president at Exelon Nuclear in Warrenville, Ill., has operational responsibility for roughly 20 percent of all U.S. nuclear power-generating capacity — 17 nuclear plants in three states with total capacity of about 18 gigawatts. The job requires an ever-shifting mix of technical, management, communication and operational skills, and embodies one of the grand challenges of engineering: making a complex system dependable enough to be a daily resource for millions of people.
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