The illustration above demonstrates how nuclear power is generated by uranium. This process consists of six main steps.
First, uranium is mined from the earth by machines. Next, the retrieved ore undergoes conversion and enrichment to manufacture U-235 fuel pellets so that they are suitable and safe for powering. After that, these pellets are fed into nuclear power generators to produce electricity for different uses.
After four years, the fuel is spent and hence removed. Then, some spent fuel may be re-processed and reused, so it is fed into the power plants again. This cycle proceeds until the pellets can no longer be re-processed to produce electricity. At this stage, they are stored in specific containers and buried underground so that the radioactive pellets will not contaminate the environment.
To conclude, the above figure shows the procedures to generate nuclear power from crude uranium from the earth and how used fuels may be recycled to drive power again.