Document: NUREG-0800
Document ID: fce5c014-cdea-4bf2-83f9-535d051f0f3b
Document Type: srp
Title: MISSILES GENERATED BY NATURAL PHENOMENA
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070375.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.4
CFR Part: 
CFR Title: 

Content:
ary design as set forth in the preliminary safety analysis report meet the acceptance criteria given in subsection II. For review of operating license (OL) applications, the procedures are utilized to verify that the initial design criteria and bases have been appropriately implemented in the final design as set forth in the final safety analysis report. Upon request from the primary reviewer, ECGB SEB will provide input for the areas of review 18 stated in subsection I. The primary reviewer obtains and uses such input as required to assure that this review procedure is complete. The reviewer will select and emphasize material from this SRP section, as may be appropriate for a particular case. The judgment on areas to be given attention and emphasis in the review is to be based on an inspection of the material presented to see whether it is similar to that recently reviewed on other plants and whether items of special safety significance are involved. 1. The SAR is reviewed for the identification of the design basis natural phenomena which could possibly generate missiles. Postulated missiles are reviewed for proper characterization. 2. Regulatory Guide 1.76 provides guidance on the definition and characterization of the design-basis tornado reviewed by the PERB as discussed in subsection II.19 3. For new applications, the design-basis maximum tornado wind speed should be at least 482 km/hr (300 mph). Information regarding the use of this maximum wind speed in DRAFT Rev. 3 - April 1996 3.5.1.4-4 lieu of the guidance contained in Regulatory Guide 1.76 is documented in NUREG/CR- 4461 and SECY 93-087 and its associated SRM. 20 42. The probability per year of damage to the total of all important structures, systems, and 21 components SSC important to safety, (as discussed in Regulatory Guide 1.117), due to 22 a specific design basis natural phenomena capable of generating missiles is estimated. If this probability is greater than the acceptable probability stated in