Document: NUREG-0800
Document ID: 7c104096-d040-463a-a94b-a0af08ab3478
Document Type: srp
Title: DYNAMIC TESTING AND ANALYSIS OF SYSTEMS, STRUCTURES, AND
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0702/ML070230008.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.2
CFR Part: 
CFR Title: 

Content:
. Seismic Category I portions of moderate-energy piping systems located outside containment. The supports and restraints necessary for operation during the life of the plant are considered to be parts of the piping system. The purpose of these tests is to confirm that these piping systems, restraints, components, and supports have been adequately designed to withstand flow-induced dynamic loadings under the steady-state and operational transient conditions anticipated during service and to confirm that normal thermal motion is not restrained. The test program description should include a list of different flow modes, a list of selected locations for visual inspections and other measurements, the acceptance criteria, and possible corrective actions if excessive vibration or indications of thermal motion restraint occur. 2. The following areas related to the seismic analysis of Seismic Category I mechanical equipment described in the applicant's safety analysis report (SAR) are reviewed. For the methods and criteria for seismic qualification testing of Seismic Category I mechanical equipment, by testing or by the use of experience data, refer to SRP Section 3.10. For the design of nuclear air and gas treatment systems and components, the acceptable methods and criteria are provided in ASME Code AG-1-1997. A. Seismic Analysis Method. For all Category I systems, components, equipment and their supports (including supports for conduit and cable trays, and ventilation ducts), and for certain non-Category I items that are to be designed to seismic criteria, the applicable seismic analysis methods (response spectra, time history, equivalent static load) are reviewed. The manner in which the dynamic system analysis method is performed is reviewed. The method chosen for selection of significant modes and an adequate number of masses or degrees of freedom is reviewed. The manner in which consideration is given in the seismic dynamic analysis to maximum relative displacements