Limits are based on the sum of internal and external exposure. When individual organs are exposed,
the following limits apply (the whole body dose limit must still be met).
7.2 DECLARED PREGNANT WORKER (embryo/fetus)
The DOE policy states that a pregnant female radiological worker should be encouraged to
voluntarily notify her supervisor, in writing, when she is pregnant. The "declared" pregnant
worker and her employer are encouraged to arrange for a mutually agreeable reassignment of work
tasks, with no loss of pay or promotional opportunity, such that occupational radiation exposure is
For a declared pregnant worker who continues working in radiological areas, the following radiation
dose limits will apply. The dose limit for the embryo/fetus (during entire gestation period) is 0.500
rem. Efforts should be made to avoid exceeding 50 millirem/month to the pregnant worker. If the dose
to the embryo/fetus is determined to have already exceeded 500 mrem when a worker notifies her
employer of her pregnancy, the worker should not be assigned to tasks where additional occupational
radiation exposure is likely during the remainder of the pregnancy.
It is important to note that the declaration of pregnancy is a voluntary measure taken by the
expectant parent. No special dose limitations may be applied to pregnant workers without their
written consent in the form of the declaration of pregnancy. If you have any questions regarding
this policy, you should contact the Radiation Control Group.
7.3 NON-RADIATION WORKERS
The DOE radiation dose limit for visitors and the public is 0.100 rem/year. The TJNAF administrative
control level for this group is 0.025 rem/year.
ANSWERS TO UNIT 7 REVIEW QUESTIONS