Document: NRC Regulatory Guide
Document ID: ad61f8a3-1cce-4446-9542-dcdda55c1ec6
Document Type: regulatory_guide
Title: Comprehensive Vibration Assessment Program for Reactor Internals During Preoperational and Initial Startup Testing + HISTORY - HISTORY 07/2015 – DG-1323 , Proposed Revision 4 03/2013 – Periodic Review of Revision 3 – No Issues Identified 11/2006 – DG-1163 , Proposed Revision 3 (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1508/ML15083A390.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.20
CFR Part: 
CFR Title: 

Content:
deration in the staff’s determination of the acceptability of the licensee’s request, then the staff may request that the licensee either follow the guidance in this regulatory guide or provide an equivalent alternative process that demonstrates compliance with the underlying NRC regulatory requirements. This is not considered backfitting as defined in 10 CFR 50.109(a)(1) or a violation of any of the issue finality provisions in 10 CFR Part 52. Additionally, an existing applicant may be required to comply with new rules, orders, or guidance if 10 CFR 50.109(a)(3) applies. If a licensee believes that the NRC is either using this regulatory guide or requesting or requiring the licensee to implement the methods or processes in this regulatory guide in a manner inconsistent with the discussion in this Implementation section, then the licensee may file a backfit appeal with the NRC in accordance with the guidance in NRC Management Directive 8.4, “Management of Facility-Specific Backfitting and Information Collection” (Ref. 8) and NUREG-1409, “Backfitting Guidelines,” (Ref. 8) . DG-1323, Page 42 List of Acronyms AIV acoustic-induced vibration ANSI American National Standards Institute AR acoustic resonance ASME American Society of Mechanical Engineers AVB anti-vibration bar BUF bump up factor BWR boiling water reactor CFD computational fluid dynamics COL combined license CRDM control rod drive mechanism CRDS control rod drive system CVAP comprehensive vibration assessment program DC design certification DNS direct numerical simulation EPU extended power uprate FEI fluid-elastic instability FIV flow-induced vibration FRF frequency response function ITAAC inspections, tests, analyses, and acceptance criteria LES large eddy simulation MASR minimum alternating stress ratio MIV mechanical-induced vibration MSL main steam line OMB Office of Management and Budget PSD power spectral density PWR pressurized water reactor RMS root mean square RPV reactor pressure vessel