Document: NRC Regulatory Guide
Document ID: 171a124d-54d4-4a50-8f5f-f063d9b686c9
Document Type: regulatory_guide
Title: Design-Basis Hurricane and Hurricane Missiles for Nuclear Power Plants + HISTORY - HISTORY 08/2012 – DG-1247 ,Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1004/ML100480890.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.221
CFR Part: 
CFR Title: 

Content:
ting Exceedance Probabilities of 10-7 per year. Values are nominal 3-second gust windspeeds in miles per hour (meters per second) at 33 feet (10 meters) above ground over open terrain (reproduced from Reference 6). 130(58) 140(63) 150(67) 160(72) 170(76) 180(80) 270(121) 210(94) 200(89) 260(116) 250(112) 240(107) 230(103) 220(98) 260(116) 280(125) 290(130) 250(112) 240(107) 230(103) 230(103) 220(98) 210(94) 200(89) 190(85) 270(121) DG-1247, Page 10 Figure 3. Design-Basis Hurricane Windspeeds for the Mid- and Northern Atlantic U.S. Coastline Representing Exceedance Probabilities of 10-7 per year. Values are nominal 3-second gust windspeeds in miles per hour (meters per second) at 33 feet (10 meters) above ground over open terrain (reproduced from Reference 6). 130(58) 140(63) 150(67) 160(72) 170(76) 180(80) 190(85) 130(58) 140(63) 150(67) 160(72) 180(80) 170(76) DG-1247, Page 11 Table 1. Design-Basis Hurricane Missile Spectrum Missile Type Dimensions Mass Automobile 5 m × 2 m × 1.3 m (16.4 ft x 6.6 ft x 4.3 ft) 1,810 kg (4,000 lb) Schedule 40 Pipe 0.168 m dia × 4.58 m long (6.625 in. dia × 15 ft long) 130 kg (287 lb) Solid Steel Sphere 25.4 mm (1 in.) diameter 0.0669 kg (0.147 lb) DG-1247, Page 12 Table 2. Design-Basis Missile Velocities as a Function of Hurricane Windspeed Hurricane Windspeed m/s (mph) Horizontal Missile Velocity m/s (mph) Auto Pipe Sphere 40 (89) 16.6 (37) 11.7 (26) 9.9 (22) 45 (101) 19.9 (45) 14.2 (32) 12.1 (27) 50 (112) 23.4 (52) 17.0 (38) 14.4 (32) 55 (123) 27.1 (61) 19.8 (44) 17.0 (38) 60 (134) 30.9 (69) 22.9 (51) 19.6 (44) 65 (145) 34.9 (78) 26.0 (58) 22.4 (50) 70 (157) 39.0 (87) 29.3 (66) 25.4 (57) 75 (168) 43.1 (96) 32.8 (73) 28.4 (64) 80 (179) 47.4 (106) 36.3 (81) 31.6 (71) 85 (190) 51.8 (116) 39.9 (89) 34.9 (78) 90 (201) 56.2 (126) 43.7 (98) 38.3 (86) 95 (213) 60.7 (136) 47.5 (106) 41.8 (94) 100 (224) 65.2 (146) 51.4 (115) 45.3 (101) 105 (235) 69.9 (156) 55.4 (124) 49.0 (110) 110 (246) 74.5 (167) 59.4 (133) 52.7 (118) 115 (257) 79.2