What is the equivalence of 1 ALI?

The equivalence of 1 ALI (Annual Limit on Intake) reflects the maximum amount of a radioactive substance that a worker can ingest or inhale over the course of a year without exceeding specified radiation dose limits. Specifically, for this question, 1 ALI is defined as 5 rem CEDE (Committed Effective Dose Equivalent) or 50 rem to any organ.

This value is derived from regulatory limits set to protect workers from excessive radiation exposure. The 5 rem CEDE provides a measure that accounts for whole-body exposure and the potential long-term health effects of radiation, including cancer risk, while the 50 rem limit to any single organ acknowledges that some body parts may be more susceptible to radiation and have their own specific exposure guidelines.

Understanding the ALI and its implications is crucial for radiation protection and safety protocols in the workplace, especially in fields involving radioactive materials. The criteria outlined ensure that workers remain within safe exposure levels throughout their occupational lifetime.