Schedule 23, Part 6, paragraph 25A(2)

The summation rule in respect of columns 2 and 5 of Table 4A is the sum of the quotients A/B where— “A” means the concentration of each radionuclide listed in column 1 of Table 4A that is present in the substance or article; and “B” means the concentration of that radionuclide specified in column 2 or 5 (as appropriate) of Table 4A.

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Source: legislation.gov.uk · retrieved 2026-07-30