Document: 10 CFR Part 20
Document ID: f5b121db-b7f1-4d2a-ae05-9d096fff0df8
Document Type: cfr
Title: Determination of external dose from airborne radioactive material.
Source: 10 CFR Part 20
Source URL: https://www.ecfr.gov/current/title-10/part-20/section-20.1203
Revision Date: 
Chapter: 
Section ID: 20.1203
CFR Part: 20
CFR Title: 10

Content:
§ 20.1203 Determination of external dose from airborne radioactive material. Licensees shall, when determining the dose from airborne radioactive material, include the contribution to the deep-dose equivalent, lens dose equivalent, and shallow-dose equivalent from external exposure to the radioactive cloud (see appendix B to part 20, footnotes 1 and 2). Note: Airborne radioactivity measurements and DAC values should not be used as the primary means to assess the deep-dose equivalent when the airborne radioactive material includes radionuclides other than noble gases or if the cloud of airborne radioactive material is not relatively uniform. The determination of the deep-dose equivalent to an individual should be based upon measurements using instruments or individual monitoring devices. [ 56 FR 23396 , May 21, 1991, as amended at 60 FR 20185 , Apr. 25, 1995; 63 FR 39482 , July 23, 1998]