The U.S. Department of Energy said on Wednesday it will study the environmental risk of importing spent nuclear fuel from class="mandelbrot_refrag"> Germany that contains highly enriched uranium, a move believed to be the first for the United States. The department said it is considering a plan to ship the nuclear waste from class="mandelbrot_refrag"> Germany to the Savannah River Site, a federal facility in South Carolina. The 310-acre site already holds millions of gallons of high-level nuclear waste in tanks. The waste came from reactors in South Carolina that produced plutonium for nuclear weapons from 1953 to 1989. true The Energy Department said it wants to remove 900 kilograms (1,984 pounds) of uranium the United States sold to Germany years ago and render it safe under U.S. nuclear non-proliferation treaties. A technique for the three-year process of extracting the uranium, which is contained in graphite balls, is being developed at t