A nuclear power plant is a type of power plant that uses a special kind of energy called nuclear energy. Nuclear energy is a type of energy created when atoms in certain materials, like uranium, split apart. When this happens, it creates heat and electricity. This heat and electricity is then used to make electricity for homes and businesses. In a nuclear power plant, the electricity is created by a machine called a nuclear reactor. The cost of making and running nuclear power plants is very expensive because the materials needed to make and maintain the reactor are expensive and special precautions must be taken to make sure the reactor stays safe. Also, nuclear power plants can produce a lot of electricity, but the government has to set strict regulations on how much electricity a plant can produce. That means that the cost to build and run a plant is high, but the amount of electricity it produces is less than other sources of energy.