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:
rmance with either their original commitment or Rev. 2 (same | as Rev. 1) to this SRP section. Partial compliance with each'is not acceptable. SRP Section 3.5.1.4, November 24, 1975 MISSILE SPECTRUM A 'Fraction of total tornado velocity A. Wood plank, 4 in. x 12 in. x 12 ft., weight 200 lb. 0.8 B. Steel pipe, 3 in. diameter, schedule 40, 10 ft long weight 78 lb. 0.4 C. Steel rod, 1 in. diameter x 3 ft long, weight 8 lb. 0.6 D. . Steel pipe, 6 in. diameter, schedule 40, 15 ft long, weight 285 lb. 0.4 E. Steel pipe, 12 in. diameter, schedule 40, 15 ft long, weight 743 lb. 0.4 F. Utility pole, 13-1/2 in. diameter, 35 ft long, weight 1490 lb. 0.4 G. Automobile, frontal area 20 ft2 , weight 4000 lb.. 0.2 . : 1/ 3.5.1.4-3 Rev. 2 - July 1981 SRP Section 3.5.1.4, November 24, 1975 "NO TUMBLING" MISSILE SPECTRUM B Horizontal Velocity ft/sec A. Wood plank, 4 in. x 12 in. x 12 ft. weight 200 lb. 368 B. Steel pipe, 3 in. diameter, schedule 40, 15 ft long, weight 115 lb. 268 C. Steel Rod, 1 in. diameter x 3 ft long, weight 8 lb. 259 D. Steel pipe, 6 in. diameter, schedule 40, 15 ft long, weight 285 lb. 230 E. Steel pipe, 12 in. diameter, schedule 40, 30 ft long weight 1500 lb. 205 F. Utility pole, 14 in. diameter, 35 ft long, weight 1500 lb. 241 G. Automobile, frontal area 20 ft2, weight 4000 lb. 100 These missiles are considered to be capable of striking in all directions with vertical velocities equal to 80% of the acceptable horizontal velocities. Missiles A, B, C, D, and E are to be considered at all elevations and missiles F and G at elevations up to 30 feet above all grade levels within 1/2 mile of the facility structures. IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided and the review and calculations support conclusions of the following 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