Nuclear Power by the Numbers

About 440 power reactors operate in roughly 30 countries, supplying near 9 percent of global electricity. The United States runs the largest fleet at about 94 reactors, France has the highest nuclear share at roughly 65 percent of its power, and China is building more reactors than the rest of the world combined.

Lifetime output of a single large plant runs past 200 terawatt hours. Uranium fuel is so energy dense that a pellet the size of a fingertip holds about as much energy as a ton of coal..