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Definition of High-level waste

High-level waste Definition from Science & Technology Dictionaries & Glossaries
NRC Nuclear Energy Glossary
Radioactive materials at the end of a useful life cycle that should be properly disposed of, including--
  1. The highly radioactive material resulting from the reprocessing of spent nuclear fuel, including liquid waste directly in reprocessing and any solid material derived from such liquid waste that contains fission products in concentrations;
  2. Irradiated reactor fuel; and
  3. Other highly radioactive material that the Commission, consistent with existing law, determines by rule require permanent isolation.

High-level waste (HLW) is primarily in the form of spent fuel discharged from commercial nuclear power reactors. It also includes HLW from activities and a small quantity of reprocessed commercial HLW (see 10 CFR 63.2 and Nuclear waste; Waste, radioactive; and Low-level waste).
A service to the public by The U.S. Nuclear Regulatory Commission (NRC).
High-level waste Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
High-level waste (HLW) is a type of nuclear waste created by the reprocessing of spent nuclear fuel. It exists in two main forms:
  • First and second cycle raffinate and other waste streams created by nuclear reprocessing.
  • Waste formed by vitrification of liquid high-level waste.

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