What is included in the definition of nuclear material?
Nuclear material includes plutonium (excluding plutonium with a radioisotope concentration exceeding 80% of Plutonium-238), uranium 233, enriched uranium with radioisotope 235 or 233, thorium or uranium (including a mix of radioisotopes existing in nature other than those in the form of raw materials or raw wastes), and any material that contains one or more of these components.