Document: NUREG-0800
Document ID: fbcd53f5-fb4a-436f-9443-ef89f47e42cc
Document Type: srp
Title: SEISMIC AND DYNAMIC QUALIFICATION OF MECHANICAL AND ELECTRICAL
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1422/ML14227A631.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.10
CFR Part: 
CFR Title: 

Content:
n tests are conducted on the equipment supports. C. Verification of Seismic and Dynamic Qualification. The seismic and dynamic qualification testing performed in accordance with IEEE Std. 344-2004, as endorsed by the NRC in RG 1.100, Revision 3, as part of an overall qualification program should be performed in the sequence indicated in Section 6 of IEEE Std. 323-1974 (endorsed with exceptions by the NRC in RG 1.89, “Environmental Qualification of Certain Electric Equipment Important to Safety for Nuclear Power Plants”). 2. Instrumentation described in RG 1.97, including associated mountings, should be tested under appropriate seismic and dynamic loadings as described in the regulatory guide, thereby ensuring that the instruments will continue to monitor plant variables and systems after a seismic event and/or accident. 3. If the applicant proposes qualification by an experience-based approach, and the staff reviews the applicant’s justification, the details of the experience database, including applicable implementation methods and procedures to ensure structural integrity and functionality of the in-scope mechanical and electrical equipment, should still meet the functionality of equipment for the defined load condition as presented in paragraphs 1 and 2 above. Supporting documentation for equipment identified in the database should confirm that such equipment remained functional during and after an SSE and the equivalent effect of five postulated occurrences of OBE in combination with other relevant static and dynamic loads. 3.10-11 Draft Revision 4 – August 2015 The qualification of equipment by earthquake and/or test experience approach should not be used without adequate justification. Use of this approach is subjected to more detailed review by the NRC staff. Large uncertainties exist in the seismic qualification of equipment, as a class, on the basis of earthquake experience data, because (1) it is difficult to compile a credible earthquake