10 CFR 20.1208 - Dose equivalent to an embryo/fetus.

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§ 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 § 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 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]

Title 10 published on 2015-01-01.

No entries appear in the Federal Register after this date, for 10 CFR Part 20.

Title 10 published on 2015-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR Part 20 after this date.

  • 2015-08-21; vol. 80 # 162 - Friday, August 21, 2015
    1. 80 FR 50804 - Linear No-Threshold Model and Standards for Protection Against Radiation
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      NUCLEAR REGULATORY COMMISSION
      Petition for rulemaking; notice of docketing and request for comment; extension of comment period.
      The comment period for the document published on June 23, 2015, at 80 FR 35870, is extended. Comments should be filed no later than November 19, 2015. Comments received after this date will be considered, if it is practical to do so, but the Commission is able to ensure consideration only for comments received on or before this date.
      10 CFR Part 20