Document: NUREG-0800
Document ID: 5cd0267e-b1ef-4ddb-8204-aac45ea7ac13
Document Type: srp
Title: 2.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070301.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.4.5
CFR Part: 
CFR Title: 

Content:
The procedures that are utilized to transform the tornado parameters into effective loads on structures are reviewed, including the following: a. The transformation of the tornado wind into an effective pressure applied to structures, taking into consideration the geometrical configuration and physical DRAFT Rev. 3 - April 1996 3.3.2-2 characteristics of the structures and the distribution of wind pressure on the structures. b. If venting of a structure is used, the procedures for transforming the tornado-generated differential pressure into an effective reduced pressure are reviewed by the Auxiliary Systems Branch (ASB) upon SEB request.6 cb. The transformation of tornado-generated missile loadings, which are impactive 7 dynamic loads, into effective loads. dc. The combination of the above individual loadings in a manner that will produce 8 the most adverse total tornado effect on structures. 3. The information provided to demonstrate that failure of any structure or component not designed for tornado loads will not affect the capability of other structures or components to perform necessary safety functions. Review Interfaces ECGB will coordinate other branch evaluations that interface with the overall review of tornado loadings, as follows:9 A. The bases for selecting and the values of tornado wind translational and tangential velocities, as well as the tornado-generated pressure differential and its associated time interval, are within the review responsibilities of the Emergency Preparedness and Radiation Protection Branch (PERB) as stated in Standard Review Plan (SRP) Sections 2.3.1 and 2.3.2.10 B. The spectrum of tornado-generated missiles, including their characteristics, are within the review responsibilities of the Plant Systems Branch (SPLB) as stated in SRP Section 3.5.1.4.11 C. If venting of a structure is used, the procedures for transforming the tornado-generated differential pressure into an effective reduced pressure are reviewed by SPLB as