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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any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.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 85

Question 85: In §20.1902, posting of areas is based upon "dose equivalent." Is this "deep," "shallow," "lens of eye," "total effective" or some combination of the above?

Answer: These posting requirements are based on the deep dose equivalent for "radiation areas" and "high radiation areas" and the absorbed dose at a tissue depth of 1 cm (1000 mg/square cm) for "very high radiation areas." See the answer to Question 74.

References: 10 CFR 20.1003, 10 CFR 20.1902)

Page Last Reviewed/Updated Wednesday, December 13, 2017