Pollux (nuclear technology)

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The Pollux cask is a special cask for the final storage of spent fuel elements from nuclear power plants . This type of packaging of fuel elements in the casks is currently the reference concept for direct final disposal ; beside the packaging is in so-called fuel rod - molds discussed as an option.

In the Pollux container concept, the fuel rods are first placed in cans as a whole and then placed in the container.

The container itself consists of an outer shielded container made of spheroidal graphite cast iron , an inner container made of forged steel and internals for holding the fuel rods. The tight enclosure of the fuel rods is ensured by the inner container, a screwed primary cover and an overlying welded secondary cover. The shielded container is closed by a screwed-in lid. Neutron moderators are located in the container wall .

The Pollux has a diameter of approx. 1.50 m, a length of approx. 5.50 m and a weight of approx. 65 t when loaded.

The containers differ significantly from the Castor containers built for transport and temporary storage .

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