Document: NUREG-0800
Document ID: 0c95c042-addf-4bad-84f5-1d1692769268
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR CONCRETE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550052.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
ns of SRP Section 3.8.2 and RG 1.57. Specifically, the loads and load combinations of Subsection II.3 of SRP Section 3.8.2 apply. Additional criteria presented in Subsection II.3.A of this SRP section are also applicable to the BWR containment drywell. For the lower vent portion of the drywell, the following conditions apply: i. If the main reinforcement of the drywell is carried down between the vent holes, and the reinforced concrete section is relied upon for structural purposes, the criteria that apply to concrete portions of the drywell as described above will apply. 3.8.3-20 Revision 2 - March 2007 ii. If the main reinforcement of the drywell is terminated above the vent holes, and two steel plates lining both faces of the drywell are used for structural purposes, the criteria that apply to steel portions of the drywell as described above will apply. iii. If other structural systems are used in the vent region, the loads and load combinations are reviewed and judged on a case-by-case basis. 4. Design and Analysis Procedures. The design and analysis procedures used for the containment internal structures are acceptable if found to be in accordance with the following: A. PWR Dry Containment Internal Structures i. Primary Shield Wall and Reactor Cavity The design and analysis procedures used for the shield wall are acceptable if found to be in accordance with ACI 349 with additional guidance provided by RG 1.142. This code is based on the strength design method. The design and analysis of anchors (steel embedments) used for component and structural supports on concrete structures are acceptable if found to be in accordance with ACI 349, Appendix B, with additional guidance provided by RG 1.199. Analyses for LOCA loads applicable to the primary shield wall, such as the cavity differential pressure combined with pipe rupture reaction forces, are acceptable if these loads are treated as dynamic time-dependent loads. This requires that either a detailed time-history