In this subtitle the following words have the meanings indicated. “High-level nuclear waste” means: Spent nuclear reactor fuel; Liquid waste that results from the operation, in a facility for reprocessing spent nuclear reactor fuel, of a first cycle solvent extraction system or an equivalent system; Concentrated waste from the operation, in a facility for reprocessing spent nuclear reactor fuel, of a subsequent cycle solvent extraction system or an equivalent system; or Any solid into which any waste that is described in item (2) or (3) of this subsection has been converted. “Low-level nuclear waste” means waste that: Contains or is contaminated with radioactive material emitting primarily beta or gamma radiation; and Is neither high-level nuclear waste nor transuranic waste. “Transuranic waste” means waste material that is measured or assumed to contain at least 10 nanocuries of transuranic activity per gram of waste.