United States Nuclear Regulatory Commission - Protecting People and the Environment

U.S. Nuclear Regulatory Commission

Question 125: 10 CFR 20.1301 (a) (2) requires that the

"dose" in any unrestricted area from external sources not

exceed 2 mrem in any one hour. Which of the many "doses" in

new Part 20 is "the dose" in §20.1301 (a) (2).

Answer: The "dose" from external sources in 10 CFR

20.1301 (a) (2) means the deep dose equivalent or the eye

dose equivalent or the shallow dose equivalent. See

definitions of these dose terms in 10 CFR 20.1003.

(References: 10 CFR 20.1301, 10 CFR 20.1003).

Page Last Reviewed/Updated Thursday, March 29, 2012