Document: NUREG-0800
Document ID: 6bae9f18-9798-4335-b03a-dfc279727ff2
Document Type: srp
Title: WIND LOADINGS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070299.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.3.1
CFR Part: 
CFR Title: 

Content:
ERIA SEBThe ECGB accepts the design of structures that must withstand the effects of the design 10 wind load if the relevant requirements of General Design Criterion 2 concerning natural phenomena are complied with. The criteria necessary to meet the relevant requirements of GDC 2 are as follows: 1. The wind used in the design shall be the most severe wind that has been historically reported for the site and surrounding area with sufficient margin for the limited accuracy, quantity, and period of time in which historical data has been accumulated. 2. The acceptance criteria for the design wind velocity, and its recurrence interval, the velocity variation with height, the applicable gust factors, and the bases for determining these site-related parameters, are established by the Accident Evaluation Branch 11 (AEB)PERB and are contained in SRP Sections 2.3.1 and 2.3.2. The approved values 12 of these parameters should serve as basic input to the review and evaluation of the structural design procedures. 3. The procedures utilized to transform the wind velocity into an effective pressure to be applied to structures and parts and portions of structures, as delineated in ANSI A58.1, "Building Code Requirements for Minimum Design Loads in Buildings and Other Structures" (Ref. 2) are acceptable. In particular, the procedures utilized are acceptable if found in accordance with the following: For a design wind velocity of V mph specified at a height of 30 feet 30 above the ground, the velocity pressure, q , is given by: 30 q = 0.00256 (V ) psf 30 30 2 The effective pressure for structures, q , and for portions thereof, q , at various F p heights above the ground should be in accordance with Table 5 and Table 6 of ANSI A58.1, respectively. Since most nuclear power plants are located in relatively open country, Exposure C as defined in ANSI A58.1, should be selected for both tables. Depending upon the structure geometry and physical configuration, pressure coefficients may be