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Clearance level
A clearance level is an activity concentration or surface contamination value below which radioactive material may be released from regulatory control for unrestricted use or disposal.
Disused sealed radioactive source
A disused sealed radioactive source is a sealed radioactive source no longer used and not intended to be used again, often from medicine, industry, or research.
Intermediate-level waste
Intermediate-level waste (ILW) is a class of radioactive waste requiring greater containment than near-surface disposal allows, with little decay heat, arising mainly from spent fuel reprocessing and reactor decommissioning.
Legacy waste
Legacy waste is hazardous and radioactive waste from nuclear weapons production and nuclear energy research since World War II and the Cold War, mostly in the United States.
Low-level waste
Low-level waste (LLW) is a category of radioactive waste that accounts for about 90 percent of radioactive waste volume worldwide but only about 1 percent of its radioactivity.
Transuranic waste
Transuranic waste (TRU waste) is radioactive waste containing alpha-emitting elements heavier than uranium, mostly contaminated clothing, tools, and debris from the US nuclear defense program since the 1940s.
TRUEX process
The TRUEX (TRansUranium EXtraction) process is a solvent extraction process developed at Argonne National Laboratory in the mid-1980s to extract transuranic elements from acidic nuclear waste solutions.
Uranium mill tailings
Uranium mill tailings are the sandy waste left after a uranium mill extracts uranium from ore, containing radium-226 and thorium-230 and regulated under the 1978 UMTRCA.
Very low-level waste
Very low-level waste (VLLW) is radioactive waste, mostly rubble, soil, concrete, and metal from nuclear decommissioning, that needs only landfill-type disposal, making up most waste volume but little radioactivity.