10 CFR § 835.203
Combining internal and external equivalent doses
June 9, 2020
(a) The total effective dose during a year shall be determined by summing the effective dose from external exposures and the committed effective dose from intakes during the year.
(b) Determinations of the effective dose shall be made using the radiation and tissue weighting factor values provided in §835.2.
[72 FR 31926, June 8, 2007]