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:
REVIEW RESPONSIBILITIES Primary - Plant Systems Branch (SPLB) Auxiliary Systems Branch (ASB) 1 Secondary - None I. AREAS OF REVIEW The applicant's assessment of possible hazards due to missiles generated by the design basis tornado, flood, and any other natural phenomena identified in Section 3.5 of the safety analysis report (SAR) is reviewed and evaluated by the SPLB ASB to assure that appropriate design 2 basis missiles have been chosen and properly characterized, and to assure that the effects caused by these missiles are acceptable. Currently, only missiles from the design basis tornado are consistently considered in the plant design bases. Missiles from other phenomena are considered on a case-by-case basis when they are identified. Review Interfaces:3 SPLB also performs the following review under the SRP section indicated:4 The SPLB ASB also reviews the identification of those structures, systems and 5 components (SSC) that should be protected against missile impact under Standard 6 Review Plan (SRP) Section 3.5.2. In addition, the SPLB will coordinate with other branches' evaluations and reviews that interface with the overall review of this area as follows:7 1. The Civil Engineering and Geosciences Branch (ECGB) Structural Engineering Branch 8 (SEB) determines the acceptability of the design analysis, procedures and criteria used to establish the ability of seismic Category I structures and/or missile barriers to withstand the effects of tornado missiles as part of its primary review responsibility for SRP DRAFT Rev. 3 - April 1996 3.5.1.4-2 Section 3.5.3. The acceptance criteria and their methods of application are combined in that SRP section.9 2. The Emergency Preparedness and Radiation Protection Branch (PERB) determines the acceptability of the design basis tornado parameters, including maximum wind speed, as part of its primary review responsibility for SRP Section 2.3.1.10 For those areas of review identified above as being part of the review under