Document: NUREG-0800
Document ID: f3251671-6d64-4f5a-9289-d8994782cbe1
Document Type: srp
Title: LOCAL METEOROLOGY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340573.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.3.2
CFR Part: 
CFR Title: 

Content:
rvice station summaries (Ref. 4, 5) or other standard installation I summaries from appropriate nearby locations should be presented as specified in Regulatory Guide 1.70, Section 2.3.2 (Ref. 6). 2. A complete topographical description of the site and environs out to a distance of 50 miles from the plant, as described in Regulatory Guide 1.70, Section 2.3.2.2, should be provided (Ref. 6). 3. A discussion and evaluation of the influence of the plant and its facilities on the local meteorological and air quality conditions should be provided. A discussion of potential changes in the normal and extreme values as pre- sented in the SAR resulting from plant construction and operation should be made. The acceptability of the information is determined through comparison with standard assessments (Ref. 7). III. REVIEW PROCEDURES Section 2.3 of the SAR is reviewed for content based on the specifications out- lined in Regulatory Guide 1.70'(Ref. 6). 1. The summaries listed in Section 2.3.2.1 of Regulatory Guide 1.70 (Ref. 6) are reviewed for completeness and adequacy of basic data. The wind and atmospheric stability data should be based on onsite data (Ref. 3), since l airflow and vertical temperature structure can vary substantially from one location to another and are inputs to the assessment of atmospheric diffusion conditions at the site. The other summaries should be based on nearby representative stations with long periods of record since the locally measured extremes in intensity and frequency are compared to design basis values presented in the safety analysis report or are used by other branches to determine whether these meteorological conditions are limiting conditions for design and emergency procedures. When off- site data are used, a determination is made of how well the data represent site conditions and whether more representative data are available. National Oceanic and Atmospheric Administration (NOAA) state meteorologi- cal summaries (Ref. 4), local