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What is Nuclear Energy?

Nuclear energy has been quietly powering America with clean, carbon-free electricity for the last 60 years. It may not be the first thing you think of when you heat or cool your home, but maybe that’s the point. It’s been so reliable that we sometimes take it for granted. Did you know about a fifth of the country’s electricity comes from nuclear power each year? If not, then it’s about time you get to know nuclear. Nuclear energy provided 55% of America’s carbon-free electricity in 2018, making it by far the largest domestic source of clean energy. Nuclear power plants do not emit greenhouse gases while generating electricity. They produce power by boiling water to create steam that spins a turbine. The water is heated by a process called fission, which makes heat by splitting apart uranium atoms inside a nuclear reactor core. Nuclear power plants operated at full capacity more than 92% of the time in 2018—making it the most reliable energy source in America. That’s about 1.5 to 2 times more reliable as natural gas (58%) and coal (54%) plants, and roughly 2.5 to 3.5 times more reliable than wind (37%) and solar (26%) plants. Nuclear power plants are designed to run 24 hours a day, 7 days a week because they require less maintenance and can operate for longer stretches before refueling (typically every 1.5 or 2 years). Learn more: Facebook:   / nuclearenergygov   Twitter:   / govnuclear   LinkedIn:   / nuclearenergygov   --- Subscribe so you don't miss a video    / energygov   Check out our cool pics on   / energy   Listen to our Podcast http://energy.gov/podcast More to Learn on   / energygov   Keep up with the Tweets at   / energy