Any waste that emits energy as rays, waves, streams or energetic particles.
Radioactive materials are often mixed with hazardous waste, from nuclear reactors, research institutions, or hospitals.
Source:
US EPA Terms of Environment
Radioactive wastes are generally classified into two categories: high and low level wastes.
High-Level Radioactive Waste (HLRW) refers to most of the waste generated in nuclear reactors. It is a serious threat to anyone who comes near the waste without shielding.
Low-Level Radioactive Waste (LLRW) refers to the less hazardous waste generated by hospitals, research laboratories, and certain industries.
Source: GreenFacts, based on US EPA Terms of Environment
GreenFacts Summary on the Chernobyl Nuclear Accident:
Español: Residuo radiactivo
Français: Déchet radioactif