Document: NUREG-0800
Document ID: 2b4d3a5f-8e25-4c13-a035-954d864e0c14
Document Type: srp
Title: MISSILES GENERATED BY NATURAL PHENOMENA
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340526.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.4
CFR Part: 
CFR Title: 

Content:
llowing type, to be included in the staff's safety evaluation report: Structures, systems, and components important to safety are designed to withstand the effects of natural phenomena without loss of capability to perform their safety functions. The basis for acceptance in the staff review is the conformance of the applicants design and design criteria for the protection from the effects of natural phenomena to the Commission's regulations as set forth in the General Design Criteria, and to applicable Regulatory Guides and National Standards. The staff concludes that the assessment of possible hazards due to missiles generated by the design basis tornado, flood, and other natural phenomena is acceptable and conforms to the requirements of General Design Criterion 2 and General Design Criterion 4 as they relate to tornado-generated missiles. This conclusion is based on the applicant having met the requirements of General Design Criteria 2 and 4 by: (a) meeting Regulatory Guide 1.76 Positions C-1 and C-2 and (b) meeting Regulatory Guide 1.117 Positions C-1 thru C-3. V. IMPLEMENTATION The following is intended to provide guidance to applicants and licensees regarding the NRC staff's plans for using this SRP section. 3.5.1.4-4 Rev. 2 - July 1981 Except in those cases in which the applicant proposes an acceptable alternative method for complying with specified portions of the Commission's regulations, the method described herein will be used by the staff in its evaluation of conformance with Commission regulations. Implementation schedules for conformance to parts of the method discussed herein are contained in the referenced regulatory guides. VI. REFERENCES 1. 10 CFR Part 50, Appendix A, General Design Criterion 2, "Design Basis for Protection Against Natural Phenomena." 2. 10 CFR Part 50, Appendix A, General Design Criterion 4, "Environmental and Missile Design Basis." 3. Regulatory Guide 1.76; "Design Basis Tornado for Nuclear Power Plants." 4. Regulatory Guide