Radioactive waste from Sellafield has been found in Scottish farmed salmon sold in major British supermarkets. Tests commissioned by Greenpeace revealed traces of radioactive waste in packets of fresh and smoked salmon. The tests, conducted independently by Southampton University's oceanography centre, found low levels Technetium-99 (Tc-99) in farmed Scottish salmon sold at Sainsbury's, Tesco, Asda, Safeway, Waitrose and Marks & Spencer. Tc-99 is a byproduct of Magnox fuel reprocessing. Dr David Santillo, a scientist at Greenpeace's research laboratories at Exeter University, said: "Tc-99 should not be there at all. It is inexplicable yet significant. Scottish salmon is marketed as something that comes from a pristine environment."