South Australian Numbered Regulations South Australian Numbered Regulations(1) For the purposes of paragraph (a) of the definition of "radioactive material" in section 3(1) of the Act, subject to this regulation, the amount of a radioactive element or compound contained in a material or substance exceeds the prescribed concentration if—
(a) in relation to radioactive material other than naturally occurring radioactive material—
(i) it contains 1 of the radionuclides specified in Table I.1 of the IAEA General Safety Requirements and the activity concentration of that radionuclide exceeds the activity concentration specified in that Table for that radionuclide; or
(ii) it contains 2 or more of the radionuclides specified in Table I.1 of the IAEA General Safety Requirements and the sum of the activity concentrations of the individual radionuclides when determined in accordance with the following formula is equal to or exceeds 1:
Where:
"Ax" is the activity concentration of the radionuclide
"Alx" is the activity concentration limit specified in Table I.1 of the IAEA General Safety Requirements for that radionuclide; or
(b) in relation to naturally occurring radioactive material—
(i) it contains 1 or more of the radionuclides in the Uranium decay chain or the Thorium decay chain with an activity concentration that exceeds 1 Bq/g; or
(ii) it contains the radionuclide K-40 with an activity concentration that exceeds 10 Bq/g.
(2) For the purposes of paragraph (b) of the definition of "radioactive material" in section 3(1) of the Act, subject to this regulation, the activity of a radioactive element or compound contained in a material or substance exceeds the prescribed amount if—
(a) it contains 1 of the radionuclides specified in Table I.1 of the IAEA General Safety Requirements and the activity of that radionuclide exceeds the activity limit specified in that Table for that radionuclide; or
(b) it contains 2 or more of the radionuclides specified in Table I.1 of the IAEA General Safety Requirements and the sum of the activities of the individual radionuclides when determined in accordance with the following formula is equal to or exceeds 1:
Where:
"Ax" is the activity of the radionuclide
"Alx" is the activity limit specified in Table I.1 of the IAEA General Safety Requirements for that radionuclide.
(3) Where 1 or more radioactive elements or compounds are present as a contaminant on the surface of an object, device or thing, the prescribed concentration of the radioactive elements or compounds is (when averaged over an area of 300 cm²)—
(a) in respect of beta and gamma emitters and low toxicity alpha emitters—0.4 Bq/cm²; and
(b) in respect of any other alpha emitters—0.04 Bq/cm².
(4) The prescribed concentration of Radon-222, when present in air, is 1000 Bq/m³.