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<p>Magnox fuel (including material from the Dounreay Fast Breeder Reactor) and Advanced
Gas Reactor fuel comes to Sellafield from Scotland for interim storage and, where
appropriate, reprocessing. By mass, the current proportion of spent fuel stored at
Sellafield coming from installations in Scotland is about 3% for Magnox fuel and 30%
for Oxide fuel. In addition, there are small quantities of material that have arisen
from historic nuclear research activities undertaken between Dounreay and Sellafield.</p><p>Where
fuels have been reprocessed, yielding radioactive bi-products and wastes, it is not
practicable to attempt to quantify those materials originating from installations
in Scotland as a proportion the total inventory of materials held at Sellafield.</p>
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