Document: NUREG-0800
Document ID: ab4f353d-c299-479d-ab25-834f97196988
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR CONCRETE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070326.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
cted to most of the loads described in subsection I.3 of this SRP section. In most cases, the wall is utilized to anchor pipe restraints in the vicinity of the reactor nozzles may pressurize the space within the wall. The wall is usually lined on both faces with steel plates which may constitute the major structural elements relied upon to resist the design loads. The analytical and design techniques utilized to determine the effect of the design loads on the wall are reviewed with particular emphasis on the assumed boundary conditions and the behavior of the wall under loads. vii. Other Interior Structures There are several platforms within the BWR Mark III containment, some 35 of which are inside the drywell and the others outside the annulus between the drywell and the containment. Platforms inside the drywell are usually of structural steel, and their main structural function is to provide foundations for the pipe restraints inside the drywell. Platforms outside the drywell are usually combinations of steel and concrete and have to be designed to resist the various applicable loads, particularly the effects of pool swell during a loss-of-coolant accidentLOCA and/or safety relief valveSRV actuation. The analytical procedures for determining pool 36 swell loads are reviewed by the Containment Systems Branch (CSB)SCSB. Design and analysis procedures for these plant 37 forms are reviewed with particular emphasis on the framing and structural behavior under loads. d. Design Reports AThe applicant's design report described in Appendix C to subsection SRP Section 3.8.4 of this SRP section is reviewed. 38 e. Structural Audit A structural audit, as described in Appendix B to SRP Section 3.8.4, is 39 conducted. 5. Structural Acceptance Criteria The design limits imposed on the various parameters that serve to quantify the structural behavior of the various interior structures of the containment are reviewed, specifically 3.8.3-13 DRAFT Rev. 2 - April 1996 with respect to