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The U.S. Nuclear Regulatory Commission is in the process of rescinding or revising guidance and policies posted on this webpage in accordance with Executive Order 14151 Ending Radical and Wasteful Government DEI Programs and Preferencing, and Executive Order 14168 Defending Women From Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. In the interim, any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.

Home About NRC Radiation Protection How the NRC Protects You Health Physics Positions Based on 10 CFR Part 20

Health Physics Questions and Answers - Question 51

Question 51: Do 10 CFR 20.2104 (a), 10 CFR 20.2104 (d) and Footnote 4 to 20.2104 (d) mean that a licensee must "backfit" effective dose equivalents (EDE) for individuals who were occupationally exposed before implementation of the revised Part 20?

Answer: No. Such backfitting is not required. However, licensees may, if they so desire, make estimates of the EDE and committed EDE based on the occupational dose records available for this period.

(References: 10 CFR 20.2104 (a), 10 CFR 20.2104 (d), 10 CFR 20.2104 (d) Footnote 4 )

Page Last Reviewed/Updated Tuesday, December 12, 2017