The Environmental Permitting (England and Wales) Regulations 2016 No. 1154

SCHEDULE 23 E+W Radioactive substances activities

PART 6 E+W Radioactive substances activity exemptions

SECTION 9 E+W Tables and summation rules in this Part

Interpretation of this Section E+W

29.  In this Section, where any radionuclide carries the suffix “+” or “sec”—

(a) that radionuclide represents the parent radionuclide in secular equilibrium with the corresponding daughter radionuclides which are identified in column 2 of Table 8 adjacent to that parent radionuclide, and

(b) a concentration or activity value given in respect of such a parent radionuclide is the value for the parent radionuclide alone, but already takes into account the daughter radionuclides in column 2 that are present.