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:
be used in the design-basis tornado employed in the design of evolutionary plants. 17. SRP-UDP format item, adding Technical Rationale were developed and added for the technical rationale. Acceptance Criteria. The SRP-UDP requires that technical rationale be developed for each of the Acceptance Criteria. 18. Current PRB names and Editorial change made to reflect current PRB names abbreviations. and responsibilities for SRP section 3.5.3. 19. Integrated Impact # 279. Added a new review procedure addressing the use of Regulatory Guide 1.76 for the definition and characterization of the design-basis tornado which could potentially generate missiles. 20. Integrated Impact #278. Added a new review procedure to address the maximum tornado wind speed of 482 km/hr (300 mph) used for new applications. This review procedure is consistent with staff positions documented in SECY 93-087 and its associated SRM. SRP Draft Section 3.5.1.4 Attachment A - Proposed Changes in Order of Occurrence Item Source Description 3.5.1.4-11 DRAFT Rev. 3 - April 1996 21. Editorial. Renumbered the review procedure steps to accommodate the addition of four new review procedures. 22. Editorial. The phrase "important structures, systems and components" was changed to the broader term "SSC important to safety". The parenthetical reference to Regulatory Guide 1.117 was changed to a phrase using commas (instead of the parentheses) as this phrase is important to the definition of those SSC to be protected. 23. Editorial. The review information and instructions provided by the original steps 2 and 3 are closely allied, therefore, the two steps were combined into one new step. Combining these two steps will also highlight the differences between the original staff review guidance on this subject and the review guidance provided for Evolutionary reactors in the new review procedure step concerning the determination of the statistical significance of identified missiles. 24. Integrated Impact # 280. A new