Nuclear Power Stations work essentially the same way as the thermal power stations. The only difference is that the fuel is not burnt. Instead nuclear fuel produces heat through nuclear fission.
A widely used nuclear fuel is Uranium 235. It is a finite energy resource just like the fossil fuels, but nuclear fission releases a vast amount of energy. For example, 1kg of coal has enough energy to keep a bright light bulb running for 1000 hours. 1kg of uranium 235 keeps the same light running for 10 million hours.
Although nuclear fuels are relatively cheap the total cost of generating electricity using nuclear fuels is high. This is because of the cost of building, and decomision the plants themselves and disposing the nuclear waste safely.
