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:
lowing steam. Elastic analysis is usually utilized for the ice-condenser and its components. However, plastic analysis may also be used as an alternate approach. Accordingly, the load factors that are applied to each of the 30 applicable loads and the basis and justification of these load factors are reviewed. Where experimental verification of the design using simulated load conditions is used, the procedures used to account for similitude relationships which exist between the actual component and the test model are reviewed to ensureassure that the results obtained from the test are a 31 conservative representation of the load-carrying capability of the actual component under the postulated loading. c. For BWR Containment Internal Structures i. Drywell The drywell, which has to maintain a certain degree of leaktightness during a LOCA, is critical with respect to the proper functioning of the containment. Accordingly, and since it geometrically resembles a 3.8.3-11 DRAFT Rev. 2 - April 1996 containment, the design and analysis procedures utilized for the drywell are reviewed on a basis similar to those of containments as described in subsection I.4 of Standard Review PlanSRP Sections 3.8.1 and 3.8.2 for concrete and steel portions, respectively. ii. Weir Wall One of the major loads to which the weir wall may be subjected is a jet impingement load induced by a pipe rupture in a nearby recirculation loop. Under such a concentrated load, the weir wall should not deform to an extent that might impair or degrade the pressure-suppression performance. Accordingly, the procedures utilized to analyze the wall for such dynamic time-dependent loads are reviewed with particular emphasis on modeling techniques, assumptions on boundary conditions, and behavior under loads. iii. Refueling Pool and Operating Floor In the BWR Mark III containments reviewed recently, theThe refueling pool is normally assumed to be continuously filled with water to provide 32 biological shielding