Document: NUREG-0800
Document ID: 97042a9a-9f44-4236-9cce-9d73fdf3fef0
Document Type: srp
Title: STEEL CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340577.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.2
CFR Part: 
CFR Title: 

Content:
d in subsection I.4 of this SRP section, the following criteria are acceptable: a. Treatment of nonaxisymmetric and localized loads For most containments, the nonaxisymmetric loads which apply are the horizontal seismic and associated sloshing loads, pool swell and its related hydrodynamic loads caused either by LOCA or by SRV actuation. Other possible nonaxisymmetric and localized loads are those induced by pipe rupture such as reactions, jet impingement forces, and missiles. For the PWR ice-condenser containment, the design basis accident may result in a nonaxisymmetric pressure load due to compartmentation of the containment interior. For such localized loads, the analyses should include a determination of the local effects of the loads. These effects should then be superimposed on the overall effects. For the overall effects of nonaxisymmetric loads on shells of revolution, an acceptable general procedure is to expand the load by a Fourier series. Other methods are reviewed on a case-by-case basis for applicability to a large thin shell. b. Treatment of buckling effects Earthquake and localized pressure loads, such as those encountered in PWR ice-condenser containments, require consideration of buckling 3.8.2-311 Rev. 1 - July 1981 of the shell. An acceptable approach to the problem is to perform a nonlinear dynamic analysis. If a static analysis is performed, an appropriate dynamic load factor should be used to obtain the effective static load. c. Computer programs The computer programs used in the design and analysis should be described and validated by any of the procedures or criteria described in subsection II.4.e of Standard Review Plan Section 3.8.1. d. Ultimate capacity of steel containment An analysis should be performed to determine the ultimate capacity of- the containment. The pressure-retaining capacity of localized areas as well as of the overall containment structure should be determined. The analysis should be made on the basis of the allowable