Generation IV reactors are special kinds of nuclear power plants. They are different than older types of nuclear power plants, like the ones used today, because they produce less waste, use cheaper materials, and are safer. To produce less waste, these reactors take the waste from nuclear power plants and turn some into energy. To use cheaper materials, the reactors use a lot of recycled materials in their construction, making them cheaper to run than traditional nuclear plants. Finally, they are safer because they have multiple layers of protection that help keep the plant running safely and prevent accidents, like those seen in some other kinds of nuclear plants.