Waste is generally categorised as ILW because it has high activity above the beta-gamma activity threshold or it has higher alpha activity (or both), as detailed below:
- Beta-gamma activity: > 12,000 Bq/g (324 nCi/g), or
- Alpha activity: > 4,000 Bq/g (108 nCi/g)
ILW and higher activity waste is measured using a range of technologies and techniques depending on the density, homogeneity and the amount of alpha activity present.
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