Document: NUREG-0800
Document ID: 1f4dbda0-7bea-416c-9d89-910450ba3299
Document Type: srp
Title: provide further guidance on the use of OBE.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1235/ML12353A377.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
nts,) respectively, and in ANSI/AISC N690-1994 including Supplement 2 (2004) for structural steel. iv. Supports for Reactor The support system for the reactor vessel, described in Subsection I of this SRP section, should be designed to resist various combinations of loadings as indicated in Subsection II.3 of this SRP section. Among the major loads that should be considered are normal operating loads, seismic loads, and LOCA loads. The design and analysis procedures used for the reactor supports (beyond the jurisdictional boundary of the ASME-designed supports) are acceptable if found to be in accordance with the same criteria for concrete and steel that apply to the refueling pool and operating floor. v. Reactor Pedestal The reactor pedestal, which supports the reactor and must withstand the loads transmitted through the reactor supports, should be subjected to most of the loads described in Subsection II.3 of this SRP section and should be designed for all applicable load combinations. 3.8.3-25 Draft Revision 4 - December 2012 The design and analysis procedures used for the reactor pedestal are acceptable if found to be in accordance with the same criteria for concrete applicable 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