United States Nuclear Regulatory Commission - Protecting People and the Environment

U.S. Nuclear Regulatory Commission

U.S. Nuclear Regulatory Commission

Question 406: Regulatory Guide 8.36, "Radiation Dose to

the Embryo / Fetus," (Section C.1.3) states that "the

determination of external dose should include all

occupational exposures of the declared pregnant worker

since the estimated date of conception." (a) If declared

pregnant worker has received occupational dose during this

pregnancy while working for a previous licensee, is it

intended that the dose from the previous licensee be

obtained and included in estimating and limiting the

embryo / fetus dose for the gestation period? (b) If this is

the intention, what should be done if applicable dose

records are not available because the worker had not

declared pregnancy or was not monitored (i.e., was not

likely to exceed 10% of a limit) at her previous workplace?

In the absence of other data, should the previous dose be

assumed to be zero?

Answer: (a) Yes.

(b) The licensee should make an effort to make a reasonable

estimate of the dose using other information that the

worker and her previous employer have concerning her

exposure. Even when the worker was not monitored, a

well-trained worker and her employer should be able to

provide some information concerning her exposure.

(c) No. Neither should it be assumed to be the maximum

possible dose. See answer to question (b). (Reference:

Regulatory Guide 8.36).

Page Last Reviewed/Updated Thursday, March 29, 2012