Question: A sample has a beta/gamma activity of 10^9 Bq and a mass of 1 kg. Using the UK waste classification system, classify this waste.
Solution:
Step 1: Convert to activity per tonne.
Activity concentration = 10^9 Bq/kg = 10^9 x 10^3 Bq/te = 10^12 Bq/te = 1000 GBq/te
Step 2: Compare with UK classification thresholds.
The LLW threshold for beta/gamma activity is 12 GBq/te.
Since 1000 GBq/te >> 12 GBq/te, this waste exceeds the LLW threshold.
Step 3: Determine if it is ILW or HLW.
The waste is not described as heat-generating, so it is classified as Intermediate Level Waste (ILW).