Document: NRC Regulatory Guide
Document ID: f0baf50b-5bb7-4783-b2f9-9586e09c97e1
Document Type: regulatory_guide
Title: Preparation of Environmental Reports for Nuclear Power Stations + HISTORY - HISTORY 02/2017 – DG-4026 , Proposed Revision 3 09/2014 – Periodic Review of Revision 2 – Revise (Rev. 3)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1611/ML16116A068.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.2
CFR Part: 
CFR Title: 

Content:
d in an Appendix of the ER. For reference on consultation with SHPOs, Advisory Council on Historic Preservation, affected American Indian Tribes, and the importance of early coordination, refer to NEI 10-07. 2.7 Air Resources The applicant should describe the climate, meteorology, and air quality of the site and surrounding region, summarize atmospheric dispersion characteristics at the site, and provide details of the onsite meteorological monitoring program. 2.7.1 Climate The applicant should provide a description of the regional climate and meteorological conditions at the site and include sufficient data to permit an independent evaluation by the NRC staff as outlined in NUREG-1555. The following information should be provided: • Discussion of the sources of climate and meteorological information (e.g., nearby National Weather Service stations and onsite meteorological stations), periods of record, station locations, and station representativeness. • A description of the general climate of the region with respect to types of air masses, synoptic features (e.g., high- and low-pressure systems and frontal systems and principal storm tracks), general airflow patterns, temperature and humidity characteristics, precipitation, and any mesoscale circulations (e.g., valley flow and land-sea/lake breeze). • Description of topographic features in the immediate vicinity of the onsite meteorological tower and within a 50-mi radius of the proposed plant, including any modifications attributable to the proposed plant that could influence meteorological instrumentation. DG-4026, Page 48 • Summaries of onsite monthly and annual wind roses and comparisons to nearby representative stations using the wind speed classes defined of RG 1.23, “Meteorological Monitoring Programs for Nuclear Power Plants” (Ref. 42), for a consecutive 24-month period of data that is not older than 10 years from the date of the application (and preferably three or more years of data if