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Regulated Quantities

Exemption Quantities
Licensing is not required for the possession of a quantity of isotope less than the exemption quantity of that isotope. The complete list of exemption quantities is available in the Canadian Nuclear Safety Commission regulatory document:Nuclear Substances and Radiation Devices Regulations Schedule 1 - Exemption Quantities

Annual Limit of Intake (ALI)
The ALI is the amount of activity of a radioisotope which would result in the maximum recommended annual dose to the average person. A partial list of ALI values can be located in the Canadian Nuclear Safety Commission regulatory document: Consolidated Use of Nuclear Substances (C-222), Appendix C - Quick Reference: Regulatory Quantities for Typical Radionuclides (all of the values on this list appear in this calculator). Consult your licence or your radiation safety officer for ALI values not on the list.

Disposal Limits
The disposal limits for the following 22 commonly used radioisotopes have been provided by the CNSC in the regulatory document: Consolidated Use of Nuclear Substances (C-222), Appendix C - Quick Reference: Regulatory Quantities for Typical Radionuclides and are available in this calculator; however, you should always refer to your license or contact your radiation safety officer for the solid waste disposal limit of the isotope you are working with.

Sb-124, Br-82, C-14, Cr-51, Co-57, Co-58, Co-60, F-18, Ga-67, H-3, In-111, I-123, I-125, I-131, Fe-59, P-32, P-33, Ra-226, Na-22, Sr-85, Tc-99m, Tl-201

The values for disposal limits at your institution may vary from those on this list; you should refer to your licence or contact your radiation safety officer for the disposal limits of the isotope you are working with.