Document: NUREG-0800
Document ID: ffb3ee99-28a1-4f1d-b2ef-a30d194f409a
Document Type: srp
Title: -
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1319/ML13198A223.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
ategory I structures with seismic Category I structures and the effects of parameter variations on floor response spectra. The review also included criteria and seismic analysis procedures for seismic Category I buried piping outside containment and above-ground seismic Category I tanks. The system and subsystem analyses are performed by the applicant on an elastic and linear basis. Time history methods form the bases for the analyses of all major seismic Category I SSCs. When the modal response spectrum method is used, the methods used in combining modal responses are in conformance with the regulatory positions in RG 1.92, if used, alternate methods have been evaluated and found to be acceptable. Floor spectra inputs to be used for design and test verifications of SSCs are generated from the time history method, and they are in conformance with the position of RG 1.122, as augmented in this SRP section. A vertical seismic system dynamic analysis is employed for all SSCs where analyses show significant structural amplification in the vertical direction. Torsional effects and stability against overturning are considered.