Document: NUREG-0800
Document ID: e957a666-60d9-4eb2-86e5-0f19965803d6
Document Type: srp
Title: MISSILES GENERATED BY EXTREME WINDS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1419/ML14190A180.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.4
CFR Part: 
CFR Title: 

Content:
), and 10 CFR 52.79(a)(37) apply requirements identical to those of 10 CFR 52.47(a)(8), 10 CFR 52.47(a)(21), and of 10 CFR 52.47(a)(22), respectively to applicants for COLs. These cross-cutting review areas should also be addressed by the reviewer for each technical subsection and relevant conclusions documented in the corresponding safety evaluation report (SER) section. 1. SSCs subject to (externally-generated) missile protection are reviewed against SRP Sections 3.5.2 and 19.3. 2. The SAR is reviewed for the identification of the design-basis natural phenomena that could possibly generate missiles. Postulated missiles are reviewed for proper characterization. 3. The reviewer reviews using RG 1.76, as it provides guidance on the definition and characterization of design-basis tornados as discussed in Subsection II. 4. The reviewer reviews using RG 1.221, as it provides guidance on the definition and characterization of the design-basis hurricane as discussed in Subsection II. 5. The design-basis natural phenomena for the site are reviewed with respect to the potential for missile generation. For phenomena with greater potential for missile generation than the design-basis tornado or hurricane (i.e., initiating frequency is 10-7 per year or greater), appropriate design-basis missiles are proposed. 6. All plants are required to be designed to protect safety-related equipment against damage from missiles which might be generated by extreme winds as characterized for that plant. The wind and missile loadings derived from the extreme wind characteristics for the site form part of the facility’s design basis. The reviewer should verify that the applicant has postulated missiles that include at least (1) a massive high-kinetic-energy missile that deforms on impact, (2) a rigid missile to test penetration resistance, and (3) a small rigid missile of a size sufficient to just pass through any openings in protective barriers. Acceptable missiles and their associated