High-Level Radioactive Waste 4
High-Level Radioactive Waste 4 : The highly radioactive material resulting spent nuclear fuel reprocessing: (1) liquid waste directly produced in reprocessing. (2) any solid material derived from the liquid wastes having a sufficient concentration of fission products. Other highly radioactive materials can be designated as high-level waste, if they require permanent isolation. This determination is made by the U.S. Nuclear Regulatory Commission based criteria established in U.S. law