Document: NUREG-0800
Document ID: 129133a3-2833-4da5-a564-052efbadbeb2
Document Type: srp
Title: but as applied to Category I subsystems.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070319.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
ble levels of vibratory ground motion corresponding to the OBE and the SSE are properly defined, and that adequate accuracy and/or conservatism are being applied in defining the system data being used for input into the seismic subsystem analysis. This SRP section reviews the methods utilized for seismic subsystem analysis and thereby assures that the requirements of Appendix A to Part 100 are being met. Compliance with the requirements detailed in Appendix A to 10 CFR 100 in conjunction with implementation of the requirements provided in General Design Criterion 2, as discussed above, assures that the plant can be operated without undue risk to the health and safety of the public, and that it can be safely brought to a shutdown condition, with its fundamental safety functions intact, following a seismic event. III. REVIEW PROCEDURES For each area of review, the following review procedure is followed. The reviewer will select and emphasize material from the procedures given below, as may be appropriate for a particular case. The review procedures are such as to satisfy the requirements of acceptance criteria stated in subsection II. 1. Seismic Analysis Methods The seismic analysis methods are reviewed to determine that these are in accordance with the acceptance criteria of SRP Section 3.7.2, subsection II.1. 2. Determination of Number of Earthquake Cycles Criteria or procedures used to establish the number of earthquake cycles are reviewed to determine that they are in accordance with the acceptance criteria as given in subsection II.2 of this SRP section. Justification for deviating from the acceptance criteria is requested from the applicant, as necessary. In the FSERs for the ABWR and the System 80+ design certifications the staff accepted an exemption from the 10 CFR 100 Appendix A requirement that all safety-related structures, systems, and components be designed to remain functional and within applicable stress and deformation limits when subjected to an OBE.