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:
d 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 requested by ECGB.12 For those areas of review identified as part of the primary responsibility of other branches, the acceptance criteria and methods of application are contained in the referenced SRP section.13 II. ACCEPTANCE CRITERIA SEBThe ECGB accepts the design of structures that must withstand the effects of the design 14 tornado wind load and the associated missiles 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: 3.3.2-3 DRAFT Rev. 3 - April 1996 1. The tornado wind and associated missiles generated by the tornadic winds 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 tornado wind velocity, the differential pressure and its associated time interval, the spectrum of tornado-generated missiles and their characteristics, and the bases for determining these parameters, are established by the Accident Evaluation Branch (AEB) as described in SRP Sections 2.3.1, 2.3.2, and 3.5.1.4. and the bases for determining these parameters are established by PERB as described in SRP Sections 2.3.1 and 2.3.2. The spectrum of tornado-generated missiles and their characteristics, as well as the bases for determining these parameters are established by the SPLB as described in SRP Section 3.5.1.4. The approved values of 15 these parameters should serve as basic input to the review and evaluation of the structural design procedures. 3. The acceptance criteria for the procedures used to transform the tornado parameters