Nuclear fuel is in the form of sintered uranium dioxide (UO2) pellets (cylindrical shape of about 1 cm in diameter and 1 cm long). These are stacked into fuel rods, and 235 rods are arranged in a fuel assembly. The reactor core consists of 121 fuel assemblies with enriched uranium‑235 (to a maximum of 5%, the rest is uranium-238). The new fuel assembly weighs between 500 and 600 kg and it is approximately 4 m high.
How NEK works
Primary system Reactor Nuclear fuel Control rods Water in the primary system Reactor coolant pump Pressuriser Steam generators Secondary system High pressure and low pressure steam turbines Condenser Electric generator Transformer
Nuklearna elektrarna Krško
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