Yes, trace levels of transuranics have been found in DU. The Department of Energy operated three gaseous diffusion plants (
In March 2001, DOE reported the results of a two-year recycled uranium study that concluded the transuranic content in depleted uranium was very low. The DOE data are consistent with U.S. Army testing of the DU used in armor plate for the Abrams Heavy Tank, which concludes the radioactive contaminants contribute less than a one percent increase in the radioactivity from DU itself. Various NATO countries and the United Nations Environment Programme (UNEP) recently recovered penetrators in the Balkans and tested them for the level of contaminants. Their findings are consistent with DOE/DoD findings. The UNEP concluded that the transuranics have no significant impact on the overall radioactivity or the health risk. These contaminant levels are in the parts per billion range. A part per billion is approximately equivalent to one second in 31.7 years.