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FCN - Pellets

The cylinder-shaped pellets with one centimeter of length and diameter, are the synthesis of an extensive mineral-chemical-industrial process and also the raw material that, in 400 units, fill the zircaloy pipes that form each of the 235 rods comprising one fuel element at FCN - Components and Assembly. Two of those alone generate sufficient energy to supply an average household for a month.

The plant is equipped with the most modern equipment and safety systems. The operation is carried out by trained technicians and under ongoing update.

UO₂ Pellets

 

After the mixing process (homogenization) with U₃O₈, the UO₂ powder is transported to a rotary automatic press, where the pellets are made. At this stage, they are called "green pellets". These green pellets, still relatively fragile, are sent to the sinterization, at temperature of 1750° C, in process similar to ceramics manufacturing, where they acquire resistance (or hardness) required for the operation conditions to which they will be submitted within a nuclear plant reactor.

 

The sinterized pellets go through a further rectification stage for fine dimension adjustment. After such rectification, all sinterized pellets are verified through laser measuring that rejects those which circumference is off the appropriate standards. Approved sinterized pellets are packed in boxes and properly stored in a shed existing within the FCN Pellets facilities. The equipment is maintained under controlled ventilation/exhaustion, aiming to maintain good air quality within the factory.