Document: NRC Regulatory Guide
Document ID: cdc706d5-60ed-40a4-b55a-9771904107a7
Document Type: regulatory_guide
Title: Seismic Qualification of Electric and Mechanical Equipment for Nuclear Power Plants (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1809/ML18093A675.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.100
CFR Part: 
CFR Title: 

Content:
ication used to demonstrate the functionality of the reference equipment class during and after an earthquake. f. Section QR-A7431 (Earthquake Experience-Based Qualification—Inherently Rugged Active Mechanical Equipment) To justify the active mechanical equipment class as an “inherently rugged active mechanical equipment” class, the licensee or applicant should provide information on the operational or shipping loads, as compared to the expected seismic loads that the equipment could be subjected to, and the explicit design standards applied to this equipment class. Licensees or applicants should also provide detailed information on the simplified and reduced rules, including the technical justification and data that were used to characterize the inherently rugged active mechanical equipment class and the procedure for defining the seismic capacity for this equipment class (i.e., the earthquake experience spectrum). g. Section QR-A7432 (Earthquake Experience-Based Qualification—Limitations) The list of limitations for the use of an earthquake experience-based method of seismic qualification of equipment, as described in Section QR-A7432, might be incomplete. The NRC staff will consider additional limitations in its reviews based on new findings from the testing of new equipment or on new studies. h. Section QR-A7440 (Earthquake Experience-Based Qualification—Qualification of Candidate Equipment) In-structure response spectra used as the RRS for the qualification of candidate equipment should be in accordance with the design basis. The licensee or applicant should justify its use of an RRS that is less conservative than that described in the design DG-1328, Page 17 basis. i. ASME QME-1-2017, Nonmandatory Appendix QV-B, and QME Case QME-007, “Alternative Methods for Seismic Qualification of Power Actuated and Relief Valve Assemblies,” specify provisions for seismic qualification of Section QV Category A and B power-actuated valve assemblies and Section