Document: NUREG-0800
Document ID: 808cea66-69b8-4f91-9fb2-62b3b99bc87a
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340579.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3
CFR Part: 
CFR Title: 

Content:
e. Analyses for loss-of-coolant accident loads applicable to the primary shield wall, such as for the cavity differential pres- sure combined with pipe rupture reaction forces, are acceptable if these loads are treated as dynamic time-dependent loads whereby either a detailed time-history analysis is performed or a static analysis utilizing the peak of the forcing function amplified by an appropriate chosen dynamic factor is utilized. Elastic behavior of the wall should be maintained under the 3.8.3-21 Rev. 1 - July 1981 differential pressure. However, for the concentrated accident loads such as Y or Y , elasto- plastic behavior may be assumed as long as the Beflections are limited to maintain functional requirements. Simplified methods for determining effective dynamic load factors for elastic behavior are acceptable if in accordance with recognized dynamic analysis methods. (ii) Secondary Shield Walls Design and analysis procedures utilized for the secondary shield walls are acceptable if in accordance with conventional beam/slab design and analysis procedures described in the ACI 349 Code (Ref. 2). Similar to the primary shield wall, the secondary shield walls are also subject to dynamic loss-of-coolant accident loads and the same methods described in item (I) above are, therefore, applicable and acceptable. (iii) Other Interior Structures Most of the other interior structures that are reviewed are combinations of reinforced concrete slabs, walls, beams, and columns, and steel beams and columns, which are classified as Category I structures subject to the loads and load combina- tions described in subsection II.3 of this SRP section. Analytical techniques for these structures are acceptable if found in accordance with those described in the ACI 349 Code for concrete and with those in the AISC specifications for steel. b. For PWR Ice-condenser Containment Internal Structures (I) Divider Barrier The most important loads that usually govern the design of the divider