Document: NUREG-0800
Document ID: fe01f58a-7d3d-4b25-9150-cae77bf828ca
Document Type: srp
Title: BARRIER DESIGN PROCEDURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070570004.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.3
CFR Part: 
CFR Title: 

Content:
ich the structural response, in conjunction with other design loads, can be evaluated using conventional design methods. An acceptable procedure for such an analysis, where the impact is assumed to be plastic, is presented in “Impact Effect of Fragments Striking Structural Elements,” Holmes and Narver, Inc., Revised November 1973 by R. A. Williamson and R. R. Alvy. Other procedures may be used, with adequate justification provided the results obtained are comparable to that of the above reference. Maximum allowable ductility ratios for steel and reinforced concrete barriers, in the above analysis, are given in American National Standard Institute/ American Institute of Steel Construction (ANSI/AISC) N690-1994 including supplement 2(2004), American National Standard Specification for the Design, Fabrication, and Erection of Steel Safety-Related Structures for Nuclear Facilities (1994) and in RG 1.142. respectively. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. Compliance with GDC 2, "Design Bases for Protection Against Natural Phenomena," requires that SSCs important to safety shall be designed to withstand (or be protected against) the effects of natural phenomena without loss of capability to perform their safety functions. The design bases for such SSCs must include consideration of the importance of their safety functions, and the effects of accident conditions and natural phenomena. The staff's criteria for the design of missile barriers provide for protecting SSCs from missiles generated by natural phenomena and other events. The criteria consider natural phenomena that occur concurrently with accident conditions. Meeting the requirements of GDC 2 provides a level of assurance that SSCs important to safety will be protected against missile and accident effects caused by natural phenomena and will thus be capable of