Document: NUREG-0800
Document ID: a3c4cb91-c557-4043-bb50-8da01264de08
Document Type: srp
Title: Each calculated spectrum of the artificial time history is considered
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340564.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
t been adequately justified are identified, and the applicant is informed of the need for additional technical justification. 3.7.1-8 Rev. 2 - August 1989 3. Supporting Media for Category I Structures The description of the supporting media is reviewed to verify that suf- ficient information, as specified in the acceptance criteria of subsection II.3 of this SRP section, is included. Any deficiency in the required information is identified, and a request for additional information is transmitted to the applicant. IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided and that his evaluation supports conclusions of the following type, to be included in the staff's safety evaluation report. The staff concludes that the seismic design parameters used in the plant struc- ture design are acceptable and meet the requirements of General Design Criterion 2 and Appendix A to 10 CFR Part 100. This conclusion is based on the following. The applicant has met the relevant requirements of GDC 2 and Appendix A to 10 CFR Part 100 by appropriate consideration for the most severe earthquake recorded for the site with an appropriate margin and considerations for two levels of earthquakes--the safe shutdown earthquake (SSE) and operating basis earthquake (OBE). The applicant has met these requirements by the use of the methods and procedures indicated below. The seismic design response spectra (OBE and SSE) applied in the design of seismic Category I structures, systems, and components meets or exceeds the free-field response spectra provided in Section 2.5.2. The percentage of critical damping values used in the seismic analysis of Category I structures, systems, and components are in conformance with Regulatory Guide 1.61, "Damping Values for Seismic Analysis of Nuclear Power Plants." The artificial time history used for seismic design of Category I plant structures, systems, and components is adjusted in amplitude and frequency content to obtain