1. (1) The licensee or registrant shall ensure that the dose equivalent to an embryo/fetus during the entire pregnancy, due to occupational exposure of a declared pregnant woman, does not exceed 0.5 rem (5 mSv). (For recordkeeping requirements see Rule 0400-20-05-.135).
2. (2) Using ALARA the licensee or registrant shall make efforts to avoid substantial variation above a uniform monthly exposure rate to a declared pregnant woman.

3. (3) The dose equivalent to an embryo/fetus shall be taken as the sum of:

   1. (a) The deep-dose equivalent to the declared pregnant woman; and
   2. (b) The dose equivalent to the embryo/fetus from radionuclides in the embryo/fetus and radionuclides in the declared pregnant woman.
4. (4) If when a woman declares her pregnancy to the licensee or registrant the dose equivalent to the embryo/fetus is found to be 0.45 rem (4.5 mSv) or greater, the embryo/fetus is permitted an additional dose equivalent not exceeding 0.05 rem (0.5 mSv) during the remainder of the pregnancy.

Authority: T.C.A. §§ 4-5-201, et seq., and 68-202-101, et seq. Administrative History: Original rule filed February 22, 2012; effective May 22, 2012.