Document: NUREG-0800
Document ID: b82533b2-f9f2-45b2-bbed-bdbb41b07adb
Document Type: srp
Title: REGIONAL CLIMATOLOGY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340567.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.3.1
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Accident Evaluation Branch (AEB) Secondary - None I. AREAS OF REVIEW Information is presented by the applicant and reviewed by the staff concerning averages and extremes of climatic conditions and regional meteorological phenomena which affect the safe design and siting of the plant. The review covers the following specific areas: 1. A description of the general climate of the region with respect to types of air masses, synoptic features (high and low pressure systems and frontal systems), general air-flow patterns (wind direction and speed), temperature and humidity, precipitation (rain, snow, and sleet), and relationships between synoptic-scale atmospheric processess and local (site) meteorological conditions. 2. Seasonal and annual frequencies of severe weather phenomena including torna- does, waterspouts, thunderstorms, lightning, hail (including probable maximum size), and high air pollution potential. 3. Meteorological conditions used as design and operating bases including: a. The maximum snow and ice load (water equivalent) that the roofs of safety-related structures must be capable of withstanding during plant operation. b. Ultimate heat sink meteorological conditions resulting in maximum evaporation and drift loss of water and minimum water cooling. c. Tornado parameters including translational speed, rotational speed, and the maximum pressure differential with the associated time interval. Rev. 2 - July 1981 USNRC STANDARD REVIEW PLAN Standard review plans are prepared for the guidance of the Office of Nuclear Reactor Regulation staff responsible for the review of applications to construct and operate nuclear power plants. These documents are made available to the pubflc as part of the Commission's policy to inform the nuclear Industry and the general public of regulatory procedures and policies. Standard review plans are not substitutes for regulatory guides or the Commission's regulations and compliance with them is not