Depleted uranium (DU) is a by-product from the chemical enrichment of naturally occurring uranium. Natural uranium isInterest in depleted uranium (DU) is rapidly increasing as researchers realize its many potential military and civilian applications. Uranium, a naturally occurring heavy metal, is found in all soils, waters and rocks. Natural uranium is comprised of three radioactive isotopes: 238 U, 235 U, and 234 U. Of these, 235