Document: NUREG-0800
Document ID: 6b7eddf4-f7ce-4821-9f11-e37070221e57
Document Type: srp
Title: DYNAMIC TESTING AND ANALYSIS OF SYSTEMS, STRUCTURES, AND
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1613/ML16133A418.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.2
CFR Part: 
CFR Title: 

Content:
hermal movement of piping and supports during normal system heatup and cooldown operations. The planned tests will develop loads similar to those experienced during reactor operation. 2. The applicant has met the relevant requirements of GDC 2 for demonstrating design adequacy of all seismic Category I systems, components, equipment, and their supports to withstand earthquakes by meeting the relevant acceptance criteria of SRP Sections 3.7.2 and 3.7.3, including the applicable regulatory positions of RGs 1.61 and 1.92 and by providing acceptable seismic systems analysis procedures and criteria. The scope of review of the seismic system analysis included the seismic analysis methods of all seismic Category I systems, components, equipment, and their supports and procedures for seismic analysis of multiple-supported equipment and components with distinct inputs, justification for the use of constant vertical static factors, and determination of composite damping. The system analyses are performed by the applicant on an elastic basis. Modal response spectrum, multi-degree of freedom, and time history methods form the bases for the analyses of all major seismic Category I systems, components, equipment, and their supports. Modal response parameters are combined in accordance with the appropriate acceptable methods described in SRP Section 3.7.2 and/or RG 1.92. The square root of the sum of the squares of the maximum codirectional responses is used in accounting for three components of the earthquake motion for both the time history and response spectrum methods. Floor spectra inputs to be used for design and test verifications of systems, components, equipment, and their supports are generated from the time history method, taking into account variation of parameters by peak widening. There will be a vertical seismic system dynamic analysis for all systems, components, equipment, and their supports where analyses show significant structural amplification in the vertical