Document: NUREG-0800
Document ID: 786da65a-4915-4af3-afb3-678b7df5bea7
Document Type: srp
Title: OTHER SEISMIC CATEGORY I STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070327.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.4
CFR Part: 
CFR Title: 

Content:
2 - April 1996 3.8.4-16 For structural steel, S is the required section strength based on elastic design methods and the allowable stresses defined in Part 1 of the AISC "Specification for the Design, Fabrication and Erection of Structural Steel for Buildings."(Ref. 3)Part Q1 of the ANSI/AISC N690-1984. 61 The one-third increase in allowable stresses for concrete and steel due to seismic or wind loadings is not permitted. (2) U - For concrete structures, U is the section strength required to resist design loads based on the strength design methods described in ACI 349 Code (Ref. 1).62 (3) Y - For structural steel, Y is the section strength required to resist design loads and based on plastic design methods described in Part 2 of the ANSI/AISC N690-1984 "Specification for the Design, Fabrication and Erection of Structural Steel for Buildings" (Ref. 3).63 (4) - For these two combinations, in computing the required section strength, S, the plastic section modulus of steel shapes, except for those which do not meet the AISCANSI/AISC N690-198464 criteria for compact sections, may be used. 6. Materials, Quality Control, and Special Construction Techniques For Category I structures outside the containment, the acceptance criteria for materials, quality control, and any special construction techniques are in accordance with the codes and standards indicated in subsection I.6 of SRP Section 3.8.3, as applicable. 7. Testing and Inservice Surveillance Requirements At present there are no special testing or inservice surveillance requirements for Category I structures outside the containment. However, where some requirements become necessary for special structures, such requirements are reviewed on a case-by-case basis. 8. Masonry Walls Acceptance criteria for masonry walls are contained in Appendix A to this SRP section. 3.8.4-17 DRAFT Rev. 2 - April 1996 Technical Rationale65 The technical rationale for application of these acceptance criteria is discussed in the following