Power generation is well recognized as a major prerequisite for a country’s economic development. Nuclear power has become an increasingly attractive alternative in the power market worldwide due to several factors: growing demand for electric power, increasing global competition for fossil fuels, concern over greenhouse gas emission impacts on global warming, and the desire for energy independence. Protecting people and the environment is of concern to nuclear power generators. Thus, sound engineering design that provides adequate protection against natural and man-made hazards is of utmost importance. Meteorological parameters related to structure design and system operation are the extreme and mean values for wind speed, temperature, humidity, and precipitation, as well as the seasonal and annual frequencies of severe weather conditions such as tornadoes and hurricanes, ice and snow accumulation, hail and lightning. Inherent in ascertaining values for these parameters is the need for reasonable assurance that the chosen values and frequencies will not be exceeded during the expected life of the plant. All regional meteorological and air quality conditions are classified as climate site characteristics for consideration in evaluating the design and operation of a nuclear power plant [1]. This paper discusses the regulatory requirements, methodology and sources of data for development of the design- and operating-basis regional meteorological conditions used in preparing a Combined License Permit Application (COLA) in the United States. Additionally, the differences in methodology for determination of these meteorological conditions by reactor type (i.e., Advanced Passive 1000–AP1000, Advanced Boiling Water Reactor–ABWR, Economic Simplified Boiling Water Reactor–ESBWR, U.S. Evolutionary Power Reactor–U.S. EPR, and Advanced Pressurized Water Reactor–APWR) are explored and summarized.

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