Document: NRC Regulatory Guide
Document ID: 96baa826-d3bb-478b-8f38-e74500f6d433
Document Type: regulatory_guide
Title: 06/2009 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0911/ML091170109.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.21
CFR Part: 
CFR Title: 

Content:
the appendix to this guide. 5.8.1 The following should be reported: 1. whole body dose to the maximum individual member of the public 2. thyroid dose to the maximum individual member of the public 3. dose to any other organ to the maximum individual member of the public 4. percent of the applicable limit 5.8.2 One means of demonstrating compliance with 40 CFR Part 190 is listed in the Federal Register (42 FR 2859), (Ref. 38), which states the following: “In the case of light water reactors, … demonstrating conformance with Appendix I of 10 CFR 50 are generally adequate for demonstrating compliance with [EPA 40 CFR Part 190].” As a result, a licensee who (1) can demonstrate that external sources of direct radiation are indistinguishable from background and who (2) demonstrates compliance with the numerical dose Rev. 2 of RG 1.21, Page 31 guidance of 10 CFR Part 50, Appendix I, may cite the above reference as the basis for demonstrating compliance with 40 CFR Part 190. However, licensees who (1) have external sources of direct radiation that are above background and (2) demonstrate compliance with the numerical dose guidance of 10 CFR Part 50, Appendix I, must also include sources of direct radiation from uranium fuel cycle operations (e.g., including direct radiation from the licensed facility as well as co-located or nearby nuclear power facilities if appropriate). 5.8.3 The dose contributions from direct radiation may be estimated based on either (1) direct radiation measurements (e.g., thermoluminescent dosimeters, optically stimulated devices, or integrating portable ion chambers), (2) calculations, or (3) a combination of measurements and calculations. When direct radiation dose is determined by measurement, estimates of background levels of radiation may be subtracted based on selected control locations. The doses measured from control and indicator locations should be taken from the same time period. When choosing the appropriate control location(s),