Document: NRC Regulatory Guide
Document ID: 32d3a378-d575-45ef-9631-a8d6c2b6c30a
Document Type: regulatory_guide
Title: Design-Basis Tornado and Tornado Missiles for Nuclear Power Plants + HISTORY - HISTORY 08/2016 – Periodic Review of Revision 1 – Issues identified for future consideration 08/2011 – Periodic Review of Revision 1 – No issues identified 01/2006 – DG-1143 , Proposed Revision 1 Prior to the issuance of DG-1143, RG 1.76 was entitled "Design-Basis Tornado for Nuclear Power Plants" (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1620/ML16208A347.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.76
CFR Part: 
CFR Title: 

Content:
August 15, 2016 MEMORANDUM TO: Brian E. Thomas, Director Division of Engineering Office of Nuclear Regulatory Research FROM: Scott C. Flanders, Director /RA/ Division of Site Safety & Environmental Analysis Office of New Reactors SUBJECT: RESULTS OF PERIODIC REVIEW OF REGULATORY GUIDE 1.76 This memorandum documents the US Nuclear Regulatory Commission’s (NRC) periodic review of regulatory guide (RG) 1.76, “Design-Basis Tornado and Tornado Missiles for Nuclear Power Plants.” Revision 1 to RG 1.76, published in March 2007, provides licensees and applicants with guidance that the staff of the NRC considers acceptable for use in selecting the design- basis tornado and design-basis tornado-generated missiles that a nuclear power plant should be designed to withstand to prevent undue risk to the health and safety of the public. As discussed in Management Directive 6.6, “Regulatory Guides,” the NRC staff reviews RGs approximately every 5 years to ensure that the RGs continue to provide useful guidance. Documentation of the NRC staff review of RG 1.76, Revision 1, is enclosed. Based on the results of the periodic review, the staff concludes that no changes to RG 1.76, Revision 1, are warranted at this time. However, the staff is aware of some ongoing activities that could result in identification of technical and regulatory issues that could warrant addressing in a future revision. Specifically, the National Institute of Standards and Technology (NIST) is presently in the middle of a four-year effort to develop tornado hazard maps, including tornado frequency and damage indicators. Once NIST completes its efforts and publishes its results, the staff will review the results to determine if an updated version of RG 1.76 is warranted. Enclosure: As stated CONTACT: Brad Harvey, NRO/DSEA 301-415-4118 August 15, 2016 MEMORANDUM TO: Brian E. Thomas, Director Division of Engineering Office of Nuclear Regulatory Research FROM: Scott C. Flanders, Director /RA/ Division of