Annual Limits on Intake (ALI)
Introduction
The maximum activity of any given nuclide which can be ingested or inhaled in a year is determined by the dose equivalent limits for the relevant organs. Each radionuclide has its own set of ALI's which are the intakes in Bq which lead to a dose commitment.
The units of ALI are Bq per year. The ALI depends on the route of exposure as well as the radionuclide and so the ALI for inhalation is usually different from that for ingestion. Ingestion of an ALI results in the individual receiving a dose equal to the dose limit for a classified worker.
