Document: NUREG-0800
Document ID: e708512f-f35c-453e-9fc1-354ab0bf12ad
Document Type: srp
Title: STEEL CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550050.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.2
CFR Part: 
CFR Title: 

Content:
alyses 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. Any other applicable methods proposed for a large thin shell, will be reviewed on a case-by-case basis. B. Treatment of Buckling Effects Earthquake loads and localized pressure loads (such as those encountered in PWR ice-condenser containments) require consideration of shell buckling. 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. 3.8.2-17 Revision 2 - March 2007 Subarticle NE-3133 of ASME Code, Section III, Division 1, Subsection NE, is acceptable to address buckling of shell geometries and loadings covered therein. Buckling of shells with more complex geometries or loading conditions than those covered by Subarticle NE-3133 may be considered in accordance with the criteria described in ASME Code Case N-284, Revision 1, with additional guidance provided in RG 1.193. Each application of ASME Code Case N-284, Revision 1, is subject to review on a case by case basis. Buckling of shells under internal pressure (e.g., torispherical heads) may also be considered in accordance with the criteria described in ASME Code Case N-284, Revision 1, with guidance provided in RG 1.193. Each application of ASME Code Case N-284, Revision 1, is subject to review on a case by case basis. The staff will review the use of alternate methodologies to address the buckling of steel containments on a case-by-case basis. RG 1.84, “Design, Fabrication, and Materials Code Case Acceptability, ASME Section III” and RG 1.193, “ Code cases not approved for Use,” provide additional guidance for code case acceptability which should be considered in the