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:
ic Dampers as Dynamic Restraints,” specifies provisions to allow viscoelastic dampers to be qualified as dynamic restraints. In light of the design differences between viscoelastic dampers and other dynamic restraints, applicants or licensees that intend to apply ASME QME-1-2017 or QME Case QME-006 for the qualification of viscoelastic dampers should justify their application to the NRC. d. Design certification applications under 10 CFR Part 52 for NPPs with passive postaccident heat removal systems may include certain active mechanical equipment from nonsafety systems in the regulatory treatment on nonsafety systems (RTNSS) program. The staff considers the provisions in ASME QME-1-2017 as addressed in this RG to be acceptable for the qualification of active mechanical equipment within the scope of the RTNSS program for NPPs with passive postaccident heat removal systems. e. ASME periodically prepares errata to correct editorial errors in the printing of ASME QME-1. The NRC staff reviews those errata as part of its participation on the ASME QME committees but does not formally endorse them until they are incorporated into a full edition of the standard endorsed in this RG. Therefore, applicants or licensees should not consider errata to be endorsed by this RG unless justified to the NRC. DG-1328, Page 20 D. IMPLEMENTATION The purpose of this section is to provide information on how applicants and licensees1 may use this guide and information regarding the NRC’s plans for using this regulatory guide. In addition, it describes how the NRC staff complies with 10 CFR 50.109, “Backfitting,” and any applicable finality provisions in 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants.” Use by Applicants and Licensees Applicants and licensees may voluntarily2 use the guidance in this document to demonstrate compliance with the underlying NRC regulations. Methods or solutions that differ from those described in this regulatory guide