What is Uranium fuel used for?
Uranium fuel is used to produce a nuclear chain reaction in which the atoms of U 235 undergo fission, which produces a lot of heat, which is then used to produce steam to drive a conventional steam turbine/generator
Uranium is fairly easy to obtain, and the 235 isotope can be separated or increased, which is the fissile one. The only alternative is plutonium, and that has to be separated out from used uranium fuel. In some countries, but not the US, this has been done and a mixed uranium/plutonium fuel produced.
The main fuel isotope is uranium-235. This isotope is the fissile part of natural uranium, with natural uranium being mostly U-238. Uranium is usually enriched before use to increase the concentration of U-235. Plutonium-239 is also usable, and in some countries a mixture of uranium and plutonium (MOX) is used.
Uranium is the fuel for nuclear energy. In most reactors it is used in the form of uranium dioxide, UO2, which is made into small cylinders 10mm diameter, and loaded into tubes made of zircaloy which are then sealed. A number of these tubes are then made up into a fuel assembly which is loaded and unloaded as a unit in and out of the reactor.
Updated Answer Nuclear energy in the form of uranium primary energy source is transformed into electrical energy as secondary energy source (or energy carrier) through the following steps: uranium mining uranium milling (concentration and purification) uranium conversion (into metal uranium, uranium dioxide, uranium hexaflouride, etc...) uranium enrichment (only for nuclear reactors that require uranium enriched in U-235) uranium fabrication into what is called fresh nuclear fuel assemblies (or elements or bundles or rods) loading the…