Transuranic waste

Transuranic waste is defined as:

Waste containing more than 100 nanocuries of alpha-emitting transuranic isotopes per gram of waste with half-lives greater than 20 years, except for high-level radioactive waste... All TRU elements are heavier than uranium, have several isotopes, and are typically man-made. Key radionuclides found in TRU waste include americium-241 and several isotopes of plutonium.