[Code of Federal Regulations]
[Title 10, Volume 1]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR20.1208]

[Page 332-333]
 
                            TITLE 10--ENERGY
 
                CHAPTER I--NUCLEAR REGULATORY COMMISSION
 
PART 20--STANDARDS FOR PROTECTION AGAINST RADIATION--Table of Contents
 
                   Subpart C--Occupational Dose Limits
 
Sec. 20.1208  Dose equivalent to an embryo/fetus.

    (a) The licensee shall ensure that the dose equivalent to the 
embryo/fetus during the entire pregnancy, due to the occupational 
exposure of a declared pregnant woman, does not exceed 0.5 rem (5 mSv). 
(For recordkeeping requirements, see Sec. 20.2106.)
    (b) The licensee shall make efforts to avoid substantial variation 
above a uniform monthly exposure rate to a declared pregnant woman so as 
to satisfy the limit in paragraph (a) of this section.
    (c) The dose equivalent to the embryo/fetus is the sum of--
    (1) The deep-dose equivalent to the declared pregnant woman; and
    (2) The dose equivalent to the embryo/fetus resulting from 
radionuclides in the embryo/fetus and radionuclides in the declared 
pregnant woman.
    (d) If the dose equivalent to the embryo/fetus is found to have 
exceeded 0.5 rem (5 mSv), or is within 0.05 rem (0.5

[[Page 333]]

mSv) of this dose, by the time the woman declares the pregnancy to the 
licensee, the licensee shall be deemed to be in compliance with 
paragraph (a) of this section if the additional dose equivalent to the 
embryo/fetus does not exceed 0.05 rem (0.5 mSv) during the remainder of 
the pregnancy.

[56 FR 23396, May 21, 1991, as amended at 63 FR 39482, July 23, 1998]