This standard defines site phenomena caused by (1) extreme straight winds, (2) hurricanes, and (3) tornadoes in various geographic regions of the U.S. These phenomena are used for the design of nuclear facilities.
ANSI/ANS 2.3-2011 history
2011ANSI/ANS 2.3-2011 Estimating Tornado, Hurricane, and Extreme Straight Line Wind Characteristics at Nuclear Facility Sites