Document: NUREG-0800
Document ID: 7024eeeb-1819-4d56-9b72-fb63eab3836b
Document Type: srp
Title: and 3.9.3.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1006/ML100620981.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.2
CFR Part: 
CFR Title: 

Content:
icable to the refueling pool and operating floor. vi. Reactor Shield Wall This cylindrical wall, which surrounds the reactor and provides biological shielding, should be subjected to most of the loads described in Subsection II.3 of this SRP section. In many cases, the wall is used to anchor most of the pipe restraints placed around the reactor coolant system piping. A pipe rupture in the vicinity of the reactor nozzles may pressurize the space within the wall. The wall may be lined on both faces with steel plates which may constitute the major structural elements relied upon to resist the design loads. Like the reactor pedestal, the biological shield wall is also subjected to dynamic LOCA loads and the same methods are, therefore, applicable and acceptable. The design and analysis procedures used for the reactor shield wall are acceptable if found to be in accordance with the same criteria for concrete that apply to the refueling pool and operating floor. If the shield wall is constructed from steel plates filled with unreinforced concrete, then the design and analysis procedures are reviewed on a case-by-case basis. vii. Miscellaneous Platforms Platforms inside the drywell are usually constructed 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. The design and analysis procedures used for miscellaneous platforms are acceptable if found to be in accordance with the same criteria for concrete and steel 3.8.3-22 Revision 3 - May 2010 that apply to the refueling pool and operating floor. Of particular interest are the dynamic loads induced on these floors by pool swell during a LOCA. E. For all containment internal structures, the design and analysis methods described in Subsections II.4 of SRP Sections 3.8.1 and 3.8.2, which are applicable to the containment internal concrete and steel structures, respectively, also