Re:Uranium and fetal exposure

[Rodney Bauman <rodney_bauman@wssrap-host.wssrap.com>]

I cannot say what levels of a radionuclide in maternal blood will pose a
"hazard" to an embryo/fetus, however, limiting the embryo/fetus dose equivalent
to 500 mrem/gestation period (at a uniform rate) is the regulatory limit and
therefore may be considered "safe" for all practical purposes.

Refer to NUREG/CR-5631 and Reg Guide 8.36 for embryo/fetus dose determination
assistance.

Because uranium is an alpha emitter and has dose factors contained within Reg.
Guide 8.36, I would guess that a certain amount crosses the placental barrier.

Rodney Bauman, CHP, RRPT
rodney_bauman@wssrap-host.wssrap.com

____________________Reply Separator____________________
Subject:    Uranium and fetal exposure 
Author: <radsafe@romulus.ehs.uiuc.edu>
Date:       07/14/2000 8:55 AM

At what ingestion levels does uranium pose a hazard to an embryo/fetus?  Does
uranuium cross the placental barrier?  


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