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:
through the reactor supports. It is thus subjected to most of the loads described in subsection I.3 of this SRP section and is designed and analyzed for all the applicable load combinations. 3.8.3-10 Rev. 1 - July 1981 Because of the similarity in geometry and function of the BWR reactor pedestal to the PWR primary shield wall, the design and analysis procedures are similar and are reviewed accordingly as has already been discussed in this SRP section. vi. Reactor Shield Wall This cylindrical wall, which surrounds the reactor and provides biological shielding, is also subjected 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 par- ticular emphasis on the assumed boundary conditions and the behavior of the wall under loads. vii. Other Interior Structures Therq are several platforms within the BWR Mark III containment some 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 accident and/or safety relief valve actuation. The analytical proced- ures for determining pool swell loads are reviewed by the Containment Systems Branch (CSB). Design and analysis proced- ures for these plantforms are reviewed with particular emphasis