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:
orsed as noted below: • IEEE Std 344-2013 is endorsed with exceptions and clarifications; • ASME QME-1-2017 is endorsed with exceptions and clarifications; and • IEEE Std C37.98-2013 is endorsed without exception or clarification. 1. Seismic Qualification of Electrical and Active Mechanical Equipment 1.1 Regulatory Positions on IEEE Std 344-2013 1.1.1 General NRC Staff Positions IEEE Std 344-2013 is, in general, acceptable to the NRC staff for the seismic qualification of (1) electrical equipment in new NPPs and (2) new or replacement electrical equipment in operating NPPs, subject to the following provisions: a. Rigorous seismic qualification by analysis, testing, or combined analysis and testing, as described in Clauses 7, 8, and 9 of IEEE Std 344-2013, are acceptable methods for the seismic qualification of electrical equipment. b. The NRC staff will review the use of experience data (earthquake or test experience data) for the seismic qualification of electrical equipment. The licensee or applicant may submit the information, perhaps as a technical report (TR), to the NRC for approval. The staff’s review will include areas such as (1) the credibility and completeness of the compilation of the experience database, (2) the inclusion and exclusion rules (termed “prohibited features” in IEEE Std 344-2013) for electrical equipment in the experience database, (3) the justification used to demonstrate the similarity among the member items in a reference equipment class, (4) the justification used to demonstrate the similarity between electrical equipment in the experience database and equipment in the NPP for seismic qualification purposes, and (5) the justification used to demonstrate the functionality of candidate equipment and the member items in a reference equipment class during and after an earthquake. c. The NRC staff concurs with the limitations specified in IEEE Std 344-2013, Section 10.4.2, for the use of earthquake or test experience data for the