Exclusion 1
Exclusion 1 : The deliberate exclusion of a particular category of exposure from the scope of an instrument of regulatory control on the grounds that it is not considered amenable to control through the regulatory instrument in question. Such exposure is termed excluded exposure.This term is most commonly applied to those exposures from natural sources that are least amenable to control, such as cosmic radiation at the Earth's surface, potassium-40 in the human body or naturally occurring radioactive material in which the activity concentrations of natural radionuclides are below the relevant values given in IAEA safety standards.The concept is related to those of clearance (which is normally used in relation to materials) and exemption (which relates to practices or sources)
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