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:
al 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) external irradiation from radionuclides deposited onto the ground surface, (2) inhalation of radionuclides in air and (3) ingestion of atmospherically released radionuclides in food (e.g., produce, milk, leafy vegetables, and meat). The annual average χ/Q values and D/Q values at specific locations of potential receptors of interest (e.g., nearest vegetable garden, nearest resident, nearest milk animal, and nearest meat animal in each 22½ degree direction sector within a 5-mile (8-kilometer) radius of the site) are a significant input to the assessment performed to demonstrate compliance with this regulation. 3. Section II.D of Appendix I to 10 CFR 50 requires that liquid and gaseous radwaste systems include all items of reasonably demonstrated technology that, when added to the system sequentially and in order of diminishing cost-benefit return, can, for a favorable cost-benefit ratio, effect reductions in dose to the population reasonably expected to be within 50 miles (80 kilometers) of the reactor. Estimates of annual average χ/Q values and D/Q values for 16 radial sectors to a distance of 50 miles (80 kilometers) from the plant are a significant input to the assessment performed to demonstrate compliance with this regulation. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. The procedures outlined below are used to review CP applications, ESP applications, and COL applications that do not reference an ESP to verify that appropriate atmospheric dispersion models, with adequate onsite meteorological data as input to the models, have been used to calculate atmospheric dispersion and deposition factors at appropriate distances and directions from postulated release points