In this Part—

• “high-activity or similar source” means—

  1. a

     a high-activity source, or

  2. b

     such other sealed source which, in the opinion of the regulator, is of a similar level of potential hazard to a high-activity source;

• F2“ high-activity source” means a sealed source for which the activity of the contained radionuclide is equal to or exceeds the relevant activity value laid down in Annex III of the Basic Safety Standards Directive;

• “orphan source” has the same meaning as in the F3Basic Safety Standards Directive;

• “sealed source” has the same meaning as in the F3Basic Safety Standards Directive.