Fukushima Daiichi uses Uranium-235, at a slightly enriched ratio of about 5%.
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The fuel rods are of uranium dioxide, with the uranium enriched to about 5% U-235
Uranium is used as nuclear fuel.
Uranium is the fuel that is used.
Uranium 235
The reactor coolant is used to extract heat from the nuclear fuel and hence maintains its integrity.
Well, these disadvantages may include nuclear waste, nuclear accidents such as Chernobyl and the more recent Fukushima event. The fuels themselves that are used to power the plant such as uranium are in low amounts. The sources provided have extra information if you need.
The used fuel in a nuclear power plant is the nuclear fuel being discharged from the nuclear reactor after being irradiated during reactor operation. It is usually composed of trans-uranium heavy elements, a wide variety of fission products (that resulted from the nuclear fission processes in the nuclear reactor) and products of radioactive decay (produced before and after fuel discharge from the nuclear reactor).
Nuclear fuel is the fuel used to produce nuclear energy.
Radioactive elements used for fuel include Plutonium -239 Uranium-235 and uanium-233.
Fuel rods are the nuclear fuel in a nuclear power plant. They are used to turn water to steam, which is then used to turn a turbine. They do not "generate energy", since energy cannot be created or destroyed (E=mc^2). They are used to generate electricity, or to convert nuclear energy to electric energy.
A small scale version of a nuclear power plant-thermal energy from the nuclear reactor is used to raise steam to drive turbines