Total of all nuclides with half-lives less than 5 years
Ni-63 in activated metal
a. There is no Class B category for waste exceeding the Class A limit for long lived nuclides. Such wastes are automatically Class C or are unacceptable for shallow burial. For waste containing a mixture of nuclides, the sum of the fractions of limits must be less than one with each section (long or short lived) considered separately. The appropriate limits must all be taken from the same column in the table.
b. Units are nanocuries per gram.
c. There are no specific limits for these nuclides in these classes. Practical considerations such as heating effect, external package radiation on shipping, or maximum specific activity determine the maximum concentration for these nuclides.