Document: NUREG-0800
Document ID: 2b698949-d53d-40f7-bf3c-6935d411fb3f
Document Type: srp
Title: -12
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1404/ML14043A231.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.3
CFR Part: 
CFR Title: 

Content:
on approved the staff’s recommendations associated with eliminating the OBE from the design bases. Appendix S to 10 CFR Part 50, “Earthquake Engineering Criteria for Nuclear Power Plants,” first issued in 1996 and revised in 2007, implements Commission policy related to the use of OBE ground motion for applications submitted after January 10, 1997. If the OBE is defined as greater than one-third of the SSE, paragraph IV.(a)(2) requires analysis and design to demonstrate that SSCs remain functional and within applicable stress, strain, and deformation limits. Loads from the OBE, therefore, would be included in the design analyses for seismic Category I components. If the OBE is defined as one-third or less of the SSE, explicit response or design analyses are not required. 2. Design and Installation of Pressure Relief Devices. The objective of the review of the design and installation of pressure relief devices is to ensure the integrity of the pressure relieving devices and associated piping during the functioning of one or more of the relief devices. For a CP review, it is determined if there is reasonable assurance that the final design will meet this objective. At the OL stage, the final design is reviewed to determine that the objective has been met. The review is performed as follows: A. The design of the pressure retaining boundary of the device is reviewed by comparison with Appendix O of the Code, “Rules for the Design of Safety Valve