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:
anticipated magnitude of the potential impacts. Adequate characterization of atmospheric transport and diffusion processes within 80 km (50 mi) of the plant is necessary, and may include presentation of meteorological data from stations farther than 80 km (50 mi) when this information can provide additional clarification of the mesoscale atmospheric transport and diffusion processes. At least one annual cycle from the onsite meteorological program should be October 1999 2.7-3 NUREG-1555 used for atmospheric transport and diffusion calculations. Sources of meteorological information, in addition to the onsite meteorological program, should include National Weather Service (NWS) stations, other meteorological programs that are well maintained and well exposed (e.g., other nuclear facilities, university, and private meteorological programs), and supplementary meteorological facilities established by the applicant (or others) to characterize relevant conditions at critical onsite and offsite locations. All data used in calculations of atmospheric transport and diffusion estimates should be concurrent with the onsite data collection periods. Onsite data should be presented as hourly averages in the format described in Appendix A to this ESRP. The site and regional meteorology data listed below should be fully documented and substantiated as to the validity of their representation of expected long-term conditions at and near the site. These data should be taken from onsite meteorological measurements and nearby representative stations, and for relevant stations within 80 km (50 mi) of the site. Regional climatological data, such as averages and extremes, should be based on a period of record that represents long-term conditions in the area and examination of available historical information. The following site and regional data or information should be obtained: ` a description of the general climate of the region with respect to types of air masses, synoptic features