Document: NUREG-0800
Document ID: 0b3174a2-1530-473d-8cf7-024c17b62e52
Document Type: srp
Title: LONG-TERM ATMOSPHERIC DISPERSION ESTIMATES FOR ROUTINE RELEASES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730713.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.3.5
CFR Part: 
CFR Title: 

Content:
plicants and licensees generally show compliance with 10 CFR 20, Subpart D by demonstrating that the annual average concentrations of radioactive material released in gaseous (and liquid) effluents at the boundary of the restricted area do not exceed the values specified in Table 2 of Appendix B to 10 CFR 20. Section II.B.1 of Appendix I to 10 CFR 50 requires that the calculated annual total quantity of all radioactive material above background to be released to the atmosphere will not result in an estimated annual air dose from gaseous effluents at any location near ground level which could be occupied by individuals in unrestricted areas in excess of prescribed limits. Section II.B.2(b) of Appendix I to 10 CFR 50 requires that reasonable assurance be provided such that the quantity of all radioactive material above background to be released to the atmosphere will not result in an estimated annual external dose from gaseous effluent to any individual in unrestricted areas in excess of prescribed limits. The maximum annual average χ/Q value at or beyond the boundary of the restricted area is a significant input to the assessment performed to demonstrate compliance with these regulations. 2. Section II.C of Appendix I to 10 CFR 50 requires that the calculated annual total quantity of all radioactive iodine and radioactive material in particulate form above background to be released in effluent to the atmospheric will not result in an estimated annual or dose 2.3.5-5 Revision 3 - March 2007 commitment for any individual in an unrestricted area from all pathways of exposure in excess of prescribed limits. Regulatory Guide 1.109, which provides guidance for implementing Section II.C of Appendix I, makes use of the maximum exposed individual approach where the numerical design objectives of Section C.II of Appendix I are compared to the calculated radiation exposures to maximum individuals in each of four age groups. The pathways of exposure considered include (1)