Document: NUREG-0800
Document ID: e40387bd-a6d6-49ae-a11b-6d22124df03a
Document Type: srp
Title: Each calculated spectrum of the artificial time history is considered to envelop the
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070317.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
at safety-related SSCs will continue to function following a seismic event, such that the plant can be brought to, and maintained in, a safe shutdown condition. 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 scope and depth of review procedures must be such that the acceptance criteria described above are met. 1. Design Ground Motion a. Design Response Spectra Design response spectra for the OBE and SSE for all damping values are checked to ensure that the spectra are in accordance with the acceptance criteria as given in subsection II. Any differences between the free-field spectra and the proposed design response spectra that have not been adequately justified are identified, and the applicant is informed of the need for additional technical justification. DRAFT Rev. 3 - April 1996 3.7.1-10 b. Design Time History Methods of defining the design time histories are reviewed to confirm that the acceptance criteria of subsection II.2 of this SRP section are met. 2. Percentage of Critical Damping Values The specific percentage of critical damping values for the OBE and SSE used in the analyses of Category I structures, systems, and components SSCs are checked to ensure 48 that the damping values are in accordance with the acceptance criteria as given in subsection II.2 of this SRP section. Any differences in damping values that have not been adequately justified are identified, and the applicant is informed of the need for additional technical justification. 3. Supporting Media for Category I Structures The description of the supporting media is reviewed to verify that sufficient 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