See www.nrc.gov for a list of nuclear plants in different US states
The uranium oxide U3O8 contain 84,8 % uranium.
The uranium is in the form of uranium dioxide, UO2, which is produced in small cylinders and assembled inside a zircaloy sealed sheath. The individual zircaloy tubes filled with uranium are then made up into a fuel assembly, the number in each assembly varies from one design to another. The uranium itself is enriched to about 4 percent U235. Natural uranium has about 0.7 percent U235, which is the isotope required for slow neutron fission.
A typical PWR has fuel assemblies of 200-300 rods each, and a large reactor would have about 150-250 such assemblies with 80-100 tonnes of uranium in all. It produces electric power in the order of 900 to 1500 MW.
Uranium 235 is 0.7 percent of natural uranium and is fissile
Most nuclear power plants use enriched uranium as a nuclear fuel. Uranium-235 is the most commonly used isotope for nuclear fission reactions in nuclear power plants, where the uranium atoms split, releasing energy.
Percent per mass example: uranium concentration in granite is approh. 4 mg/kg. Percent per volume: uranium concentration in ocean water is approx. 4 micrograms/L.
Depleted uranium is approx. 60% less radioactive than an equivalent mass of natural uranium.
Uranium is a chemical element, not a compound.
Uranium is not used in medicine.
Natural uranium consists of mainly U238 with about 0.7 percent U235, which is the fissile one, so enrichment is to raise the proportion of U235, which can be done by diffusion or by centrifuging, because of the slight difference in density, using uranium hexafluoride which is gaseous.
Natural uranium has about 0.7 percent U235, this has to be increased to about 4 percent for use in natural water moderated reactors. The obtaining of uranium from mining and refining is described in the document linked below
Wisconsin is located in the north-central United States, in the Midwest and Great Lakes regions.