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:
) (a) Exceptions to the 8-km (5-mi) site vicinity radius may be required when the land-use descriptions (ESRP 2.2.1) suggest that this is appropriate. NUREG-1555 2.7-4 October 1999 ` estimated monthly mixing-height data, including frequency and duration (persistence) of inversion conditions and methods used to provide the estimates (from the ER) ` monthly and annual wind roses using the wind speed classes provided in Regulatory Guide 1.23, Onsite Meteorological Programs (NRC 1972), and wind direction persistence summaries at all height(s) at which data on wind characteristics are applicable (from the ER) ` monthly and annual summaries of atmospheric stability (from the ER) ` topographic data presentation should include the following: - a map showing the detailed topographic features (as modified by the plant) on a large scale within an 8-km (5-mi) radius(a) of the station (from the ER) - a smaller-scale map showing topography within a 80-km (50-mi) radius of the station (from the ER) - a plot of maximum elevation versus distance from the center of the station in each of the sixteen 22½q sectors radiating from the station to a distance of 8 km (5 mi) (from the ER). ` hourly averages of wind speed and direction at all height(s) at which 8-km (5-mi) wind characteris- tics data are applicable and hourly averages of atmospheric stability (these data should be presented as hour-by-hour data [see Appendix A for an acceptable format] or monthly and annual joint- frequency distributions of wind speed and wind direction by atmospheric stability) (from the applicant upon request) ` detailed descriptions of the models and assumptions used to determine normalized concentration (χ/Q) and/or relative deposition (D/Q). The meteorological data used in these models should be identified. Guidance on acceptable models and necessary input data is provided in Regulatory Guide 1.111, Methods for Estimating Atmospheric Transport and Dispersion of Gaseous Effluents in Routine Releases