Recycled uranium was shipped worldwide from 1952 until 1999, when distribution was halted by revelations of its contamination with plutonium and other radioactive elements.
USA Today, citing an examination of more than 1,000 pages of new reports and documents on recycled uranium, said the reports showed that the recycling program yielded 250,000 tons of tainted uranium, twice the amount estimated two year ago.
It said the material was handled at about 10 times the number of sites revealed previously, reaching more than 100 federal plants, private manufacturers and universities.
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