Page 684 - Radiation Safety
P. 684
TOTAL ACTIVITY CONCENTRATION
(TAC) FOR SCALE & SLUDGE
• In the oil and gas industry, as sludge and scales normally contain Ra-226 as
their major parent radionuclides:
• TACss (Bq/g) = (6 x Act. Ra-226) + (8 x Act. Ra-228)
• Where Act. Ra-226 and Act. Ra-228 are the activity concentrations in Bq/g
of Ra-226 and Ra-228 respectively.
*SS = Scale & Sludge
