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| DOE-HDBK-1109-97
Radiological Safety Training for Radiation-Producing (X-Ray) Devices
Instructor's Guide
Lesson Plan
Instructor's Notes
Workers who become pregnant are encouraged to
10 CFR 835.206
declare their pregnancy in writing to their
supervisors. The dose limit for the embryo/fetus of
a declared pregnant worker is 500 mrem during the
term of the pregnancy; 10 CFR 835.206 (b) states
"Substantial variation above a uniform exposure
rate that would satisfy the limits provided in 10
CFR835.206 (a) [i.e., 500 mrem for term of
pregnancy] shall be avoided."
F.
HERITABLE EFFECTS
Heritable effects are biological effects that are inherited
by children from their parents at conception. Irradiation
of the reproductive organs can damage cells that contain
heritable information passed on to offspring.
Radiation-induced hereditary effects have been
observed in large-scale experiments with fruit flies and
mice irradiated with large doses of radiation. Such
health effects have not been observed in humans.
Based on the animal data, however, the conservative
assumption is made that radiation-induced hereditary
effects could occur in humans.
Radiation-induced heritable effects do not result in
genetic diseases that are uniquely different from those
that occur naturally. Extensive observations of the
children of Japanese atomic bomb survivors have not
revealed any statistically significant hereditary health
effects.
Note: Congenital (teratogenic) effects are not heritable
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