D. For mixtures of radionuclides whose identities and respective activities are known, the following conditions apply:

1. 1. For special form radioactive material, the maximum quantity transported in a Type A package is as follows:

   

   where B(i) is the activity of radionuclide (i) in special form, and A₁(i) is the A₁ value for radionuclide (i).

2. 2. For normal form radioactive material, the maximum quantity transported in a Type A package is as follows:

   

   where B(i) is the activity of radionuclide (i) in normal form, and A₂(i) is the A₂ value for radionuclide (i).

3. 3. If the package contains both special and normal form radioactive material, the activity that may be transported in the Type A package is as follows:

   
   

   Where B(i) is the activity of radionuclide i (i) as special form radioactive material, A₁(i) is the A₁ value for the radionuclide (i), C(j) is the activity of radionuclide (j) as normal form radioactive material, and A₂(j) is the A₂ value for radionuclide (j).

4. 4. Alternatively, the A₁ value for mixtures of special form material may be determined as follows:

   

   where f(i) is the fraction of activity for radionuclide (i) in the mixture, and A₁(i) is the appropriate A₁ value for radionuclide (i).

5. 5. Alternatively, the A₂ value for mixtures of normal form material may be determined as follows:

   

   where f(i) is the fraction of activity for radionuclide (i) in the mixture, and A₂(i) is the appropriate A₂ value for radionuclide (i).

6. 6. The exempt activity concentration for mixtures of nuclides may be determined as follows:

   

   where f(i) is the fraction of activity concentration of radionuclide (i) in the mixture, and [A](i) is the activity concentration for exempt material containing radionuclide (i).

7. 7. The activity limit for an exempt consignment for mixtures of radionuclides may be determined as follows:

   

   where f(i) is the fraction of activity of radionuclide (i) in the mixture, and [A](i) is the activity limit for exempt consignments for radionuclide (i).

F. Table 1. A₁ and A₂ Values for Radionuclides.

G. Table 2. Exempt Material Activity Concentrations and Exempt Consignment Activity Limits for Radionuclides.