U.S. Nuclear Regulatory Commission

Question 180: Does the word "also" as used in 20.1202 (c)

mean intake by oral ingestion and inhalation, or oral

ingestion and external exposure?

Answer: In 10 CFR 20.1202 (c), the words ". . . also

receives an intake by oral ingestion . . ." mean in

addition to the ingestion associated with inhalation, as

discussed in 10 CFR 20.1202 (b). All intakes by oral

ingestion in excess of 10 percent of the applicable ALI

must be accounted for, whether the dose from oral ingestion

is in conjunction with intakes by inhalation, external

doses, or both. (Reference: 10 CFR 20.1202, Regulatory

Guide 8.34)