As defined by the Nuclear Waste Policy Act, high-level waste is (1) the highly radioactive material resulting from the reprocessing of spent nuclear fuel, including the liquid waste produced directly in reprocessing and any solid material derived from such liquid waste that contains fission products in sufficient concentrations and (2) other highly radioactive material that the U.S. Nuclear Regulatory Commission, consistent with existing law, determines by rule to require permanent isolation.
(HLW)— radioactive waste material derived from the first cycle of solvent extraction from processing of irradiated fuel, or equivalent material from other parts of the processing operations, and spent nuclear fuel (from 10 CFR 50).
The highly radioactive wastes that result from processing of defense materials at SRS.
The highly radioactive waste material that results from the reprocessing of spent nuclear fuel, including liquid waste produced directly from reprocessing and any solid waste derived from the liquid that contains a combination of transuranic and fission product nuclides in quantities that require permanent isolation. High-level waste may include the highly radioactive material that the NRC, consistent with existing law, determines by rule requires permanent isolation.
Used nuclear fuel that is highly radioactive and requires long-term management and storage in shielded facilities to protect people and the biosphere. Canada’s high-level waste is held in interim storage facilities at reactor sites. Canada and other countries are exploring opportunities for long-term management of this waste, including deep geologic disposal in stable rock formations.
Highly radioactive material resulting from the reprocessing of spent nuclear fuel, or other highly radioactive material that is determined to require permanent isolation.
Highly radioactive waste material from the reprocessing of spent nuclear fuel (including liquid waste produced directly in reprocessing and any solid waste derived from the liquid) that contains a combination of transuranic waste and fission products in concentrations requiring permanent isolation.
Nuclear waste containing greater than 1 million times the safe level of radioactivity.