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Transuranic waste (also called TRU waste) is a regulatory classification of waste that applies only in the U.S. This type of waste is called “trans-uranic”, because it contains more than 3700 Bq per gram of elements heavier than uranium (the elements with atomic number higher than 92).
TRU waste is comprised of certain wastes from reprocessing and waste from nuclear weapons production. The Department of Energy has considerable TRU in storage and has started sending it to the Waste Isolation Pilot Plant (WIPP) in New Mexico.
Since the U.S. does not reprocess its spent fuel, the commercial nuclear science and technology industry currently produces no transuranic waste.
Center for Nuclear Science and Technology Information of the American Nuclear Society
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