uraanioksidipellettipohjainen

Uraanioksidipellettipohjainen refers to a type of nuclear fuel pellet composed primarily of uranium oxide. These pellets are a fundamental component in the fuel assemblies used in most nuclear reactors worldwide. The uranium oxide is typically in the form of uranium dioxide (UO2), which is a stable ceramic material with a high melting point.

The manufacturing process involves enriching natural uranium to increase the concentration of the fissile isotope Uranium-235. This enriched uranium is then converted into uranium hexafluoride (UF6), which is subsequently processed into uranium dioxide powder. This powder is pressed into small cylindrical pellets, which are then sintered at high temperatures to achieve the desired density and microstructure.

These pellets are highly resistant to radiation damage and can withstand the extreme temperatures and pressures found within a nuclear reactor core. Their precise dimensions and composition are critical for efficient and safe nuclear fission. The pellets are loaded into long metal tubes, usually made of a zirconium alloy, forming fuel rods. Many fuel rods are then bundled together to create a fuel assembly, which is then inserted into the reactor core. The controlled fission of the uranium within these pellets generates the heat necessary for electricity production.