Citation, commencement, application and interpretation

1.—(1) This order may be cited as the Radioactive Substances (Substances of Low Activity) Exemption Order 1986 and shall come into operation on 14th July 1986.

(2) This order applies to England, Wales and Scotland.

(3) In this order—

“the Act” means the Radioactive Substances Act 1960;

“activity”, expressed in becquerels, means the number of spontaneous nuclear transformations occurring in a period of one second in a radioactive substance;

“closed source” means an object free from patent defect which is radioactive material solely because it consists of one or more radionuclides firmly incorporated on or in, or sealed within, solid inert non-radioactive material so as to prevent in normal use the dispersion of any radioactive material;

“decay products” means, in relation to any radionuclide, the radionuclides succeeding it in the radioactive series in which it and they occur; and

“half life” means the time taken for the activity of a radionuclide to lose half its value by decay.

(4) In determining the activity of any solid radioactive material or waste for the purposes of article 2 or 3(a) of this order there shall be disregarded the activity of any element specified in column 1 of Schedule 1 to this order to the extent that the activity of any such element does not exceed the activity per gram mentioned opposite thereto in column 2 of that Schedule.