Sellafield & UK Legacy Nuclear Waste 

The Sellafield nuclear power and waste reprocessing facility (shown above) is situated in Cumbria, NW England. This was the site of the world's first commercial nuclear power reactor, Calder Hall, back in the 1950s.

The Sellafield Ltd. Muon Tomography Project aims to characterise any remnant nuclear materials stored within 500litre Intermediate Level Waste (ILW) barrels (opposite). Unlike more conventional forms of imaging radiation, the highly-penetrating properties of the muon allow the internal structure of the concrete-filled containers to be interrogated. The use of naturally-occurring background radiation also removes the need for any external radiation source.