Document: NUREG-1555
Document ID: a43fee0d-ad03-4f3c-97d8-e21705b04eac
Document Type: esrp
Title: METEOROLOGY AND AIR QUALITY
Source: NUREG-1555
Source URL: https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1555/initial/
Revision Date: 2007-10
Chapter: 2
Section ID: 2.7
CFR Part: 
CFR Title: 

Content:
ed in calculating individual and population doses from routine releases of radioactive effluents to the atmosphere. ` Atmospheric dispersion models and assumptions described in Regulatory Guide 1.145, Atmospheric Dispersion Models for Potential Accident Consequence Assessments at Nuclear Power Plants (NRC 1983), should be used for estimating relative atmospheric concentrations and relative deposition used in calculating individual doses from accidental releases of radioactive effluents to the atmosphere. ` Atmospheric dispersion models and assumptions promulgated by the EPA should be used for air quality assessments. Technical Rationale The technical rationale for evaluating the applicant’s description of meteorology and air quality is discussed in the following paragraphs: 10 CFR 100.10(c)(2), 10 CFR 100.20(c)(2), and 10 CFR 52.17(a)(1) cover the consideration of meteorological conditions at or near the site. Published climatological summaries for the region provide a basis for defining the general climate of the site and establishing an appropriate context for evaluation of onsite meteorological data. Onsite meteorological data are needed to evaluate the potential environmental impacts of heat dissipation to the atmosphere and the routine and accidental releases of radiation to the atmosphere. Onsite data for at least one full annual cycle are needed to ensure that the data are representative of site conditions. Evaluation of compliance with 10 CFR 50, Appendix I, involves staff estimates of the consequences of routine releases of radioactive effluents from the plant. The staff considered various methods of calculating these consequences and presented acceptable methods in Regulatory Guide 1.111. Evaluation of the environmental consequences of design-basis accidents involves staff estimates of atmospheric dispersion in the vicinity of the plant. The staff considered various methods of calculat- ing these consequences and presented acceptable methods in