Quantities for Use with Decommissioning for Natural Thorium and Uranium. The quantities for use with decommissioning for Natural thorium and Natural Uranium shall be as follows:

1. (a) Thorium-Natural shall be based on the alpha disintegration rate from Thorium-232, Thorium-230,and their daughter products; and
2. (b) Uranium-Natural shall be based on the alpha disintegration rate of Uranium-238, Uranium-234, and Uranium-235.

Source. #7960, eff 9-20-03; ss by #9981, eff 9-20-11; ss by#12874, INTERIM, eff 9-25-19, EXPIRED: 3-23-20 New. #13062, eff 6-25-20