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:
endix I 10 CFR 20.1301(e) (EPA 40 CFR Part 190) Dose Whole Body, Max of Any Organ, Gamma Air, and Beta Air Whole Body, Thyroid, and Max of Any Organ Basis ICRP-2 EPA 40 CFR Part 190 Where Unrestricted Area Unrestricted Area Individual Receptor Real Person/Exposure Pathway (nearest real residence, real garden, real dairy/meat animal) Real Person/Exposure Pathway (nearest real residence, real garden, real dairy/meat animal) Origin Liquid and Gas Radioactive Waste Liquid and Gas Radioactive Waste Direct Radiation (e.g., shine, nitrogen-16, ISFSI, radioactive materials storage, outside tanks) Accumulated Radioactive Material (e.g., tritium in lake water) Not Already Included in Dose Estimates Radioactive Material Licensed Only Licensed and Unlicensed When Current year Current and Prior Years’ Operation 5.1 Bounding Assessments Bounding assessments may be useful in those circumstances where compliance can be readily demonstrated using conservative assumptions. For purposes of this document, the term “bounding assessment” means that the reported value is unlikely to be substantially underestimated (see 10 CFR 50 Appendix I, Section III). Bounding assessments for the current year do not imply the absolute bounds for future conditions. For example, licensees may use conservative bounding dose assessments in lieu of site-specific dose assessments of the maximum dose to individual members of the public. Instead of assessing dose from ground level effluent releases to a real individual member of the public located 2 miles from the site boundary, a conservative bounding dose assessment can be performed for a hypothetical individual located at the site boundary. If bounding assumptions are made, the radioactive effluent release report should state such and should annotate the assumptions. Hypothetical exposure pathways and locations are sometimes used for bounding dose assessments (or hazard evaluations done in accordance with 10 CFR 20.1501). See the definition of