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:
with the required safety function. SRP Section 3.8.3 provides guidance related to static and dynamic loadings and evaluation criteria for containment internal structures. It also describes acceptable materials, design methodology, quality control procedures, construction methods, and inservice inspections, as well as documentation criteria for design and construction controls. SRP Section 3.8.3 cites ACI 349; ASME Code Section III, Division 1, Subsection NE, and ASME Code, Section III, Division 2, Subsection CC, with additional guidance provided by RGs 1.57 and 1.136, respectively; ANSI/AISC N690-1994 including Supplement 2 (2004); and regulatory guidance describing design methodology, materials testing, and construction techniques that are commensurate with the importance of the safety function to be performed. Conformance with these requirements imposes specific restrictions to ensure that containment internal structures will perform acceptably, commensurate with their intended safety function, when designed in accordance with the above standards. Meeting these requirements and criteria provide assurance that the SSCs described herein will perform their intended safety function. 3. Compliance with GDC 2 requires that SSCs important to safety be designed to withstand the effects of expected natural phenomena, such as earthquakes, tornadoes, hurricanes, floods, tsunami, and seiches, without a loss of capability to perform their safety functions. The design bases for these SSCs shall reflect appropriate combinations of 3.8.3-31 Draft Revision 4 - December 2012 the effects of normal and accident conditions with the effects of the natural phenomena. To ensure that structures of a nuclear power plant are designed to withstand natural phenomena, it is necessary to consider the most severe natural phenomena that have been historically reported with sufficient margin for the limited accuracy, quantity, and period of time in which the historical data have been accumulated.