Document: NUREG-0800
Document ID: 895a4e7d-7235-4ab1-b5dd-05a601c1c267
Document Type: srp
Title: SEISMIC AND DYNAMIC QUALIFICATION OF MECHANICAL AND
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070720037.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.10
CFR Part: 
CFR Title: 

Content:
electrical equipment during and after an earthquake of magnitude up to and including the OBE and SSE and for all static and dynamic loads from normal, anticipated operational occurrence, and accident conditions. Before SSE qualification, the applicant should demonstrate that the equipment can withstand the equivalent effect of five OBE excitations without loss of structural integrity. Analyses alone, without testing, are acceptable as a basis for qualification only if the necessary function of the equipment is ensured by its structural integrity alone. When complete testing is impractical, a combination of tests and analyses is acceptable. Equipment that has been previously qualified by means of tests and analyses equivalent to those described herein is acceptable provided that the applicant submits proper documentation of such tests and analyses. ii. Equipment should be tested in the operational condition. Functionality should be verified during and/or after the testing, as applicable to the equipment being tested. Loadings simulating those of plant normal operation, such as thermal and flow-induced loading, if any, should be concurrently superimposed upon the seismic and other pertinent dynamic loading to the extent practicable. iii. Response spectrum or time history methods should specify the characteristics of the required seismic and dynamic input motions. These characteristics, derived from the seismic and dynamic analyses of the structures or systems, should be representative of the input motions at the equipment mounting locations, except as noted in subsection II.2 (under SRP Acceptance Criteria) of this SRP Section. iv. For seismic and dynamic loads, the actual test input motion should be characterized in the same manner as the required input motion, and the conservatism in amplitude and frequency content should be demonstrated (i.e., the test response spectrum (TRS) should closely resemble and envelop the required response spectrum (RRS) over the