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:
dynamic effects of valve closures, pump trips, and other operating modes of design-basis flow conditions. In addition, the tests provide assurance of adequate clearances and free movement of snubbers for unrestrained thermal 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 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 Category I systems, components, equipment, and their supports and procedures for modeling, inclusion of torsional effects, seismic analysis of Category I piping systems, seismic analysis of multiply-supported equipment and components with distinct inputs, justification for the use of constant vertical static factors, and determination of composite damping. The review has included design criteria and procedures for evaluation of the interaction of non-Category I with Category I piping. The review has also included criteria and seismic analysis procedures for reactor internals and Category I buried piping outside containment. The system analyses are performed by the applicant on a elastic basis. Modal response spectrum, multi-degree of freedom, and time history methods form the bases for the analyses of all major 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