The diagram illustrates the production of nuclear power from uranium.
Overall, the process starts with extraction of underground uranium, and then processing into useable energy and ends with the handling of the spent fuel.
As the very first step, uranium is extracted from the underground through mining. The uranium ore is then converted into the smaller fuel pellets and the enriched U235 pellets are obtained. These U235 are used in fuel generators and the energy is used to produce electricity until all the fuel is spent.
After a four-year period of producing electricity from fuel, the fuel are totally spent and handling of used fuel process begins. It can be then divided into two groups which are re-usable and which cannot be reused. Some of the spent fuels are processed again and reused in power generators to produce electricity again. But some of the fuel cannot go through reprocessing. These radioactive substances storing containers need proper disposal and thus they are buried under the ground.