Who uses it?
Of the thirty countries in which nuclear power plants operate, only France, Hungary, Slovakia and Ukraine use them as the source for a majority of electricity, although many other countries have a significant nuclear power generation capacity.
How is it used?
When the neutrons hit other uranium atoms, those atoms also split, releasing neutrons of their own, along with heat. The heat produced by fission turns this water into steam. The steam drives a turbine, which spins a generator to create electricity.
Pros and Cons:
13% of the world's electricity comes from nuclear power plants that emit little to no greenhouse gases. ... The U.S. saves $12 billion dollars each year for energy costs because of nuclear power. Nuclear power plants actually emit fewer radioactive materials into the environment than a traditional coal-burning plant.
Nuclear power is dirty, dangerous and expensive. Nuclear pollution is invisible but that doesn't mean that it is clean. Renewable energy is better for the environment, the economy, and doesn't come with the risk of a nuclear meltdown.