Document: NUREG-0800
Document ID: 16c1145e-ffe2-48c4-bd44-0ccaeb83dc99
Document Type: srp
Title: FIRE PROTECTION PROGRAM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070563.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.1
CFR Part: 
CFR Title: 

Content:
ev. 4 - April 1996 at a pressure of 207 kPa (30 psi) at a distance of 6.1 meters (20 feet) from the specimen. (Duration of the hose stream application - 1 minute for a 1-hour barrier and 2 1/2 minutes for a 3-hour barrier); or the stream applied at random to all exposed surfaces of the test specimen through a 3.8 cm (1 1/2-inch) fog nozzle set at a discharge angle of 30 degrees with a nozzle pressure of 517 kPa (75 psi) and a minimum discharge of 284 L/m (75 gpm) with the tip of the nozzle at a maximum of 1.5 meters (5 feet) from the test specimen. (Duration of the hose stream application - 5 minutes for both 1-hour and 3-hour barriers); or the stream applied at random to all exposed surfaces of the test specimen through 3.8 cm (1 1/2-inch) fog nozzle set at a discharge angle of 15 degrees with a nozzle pressure of 517 kPa (75 psi) and a minimum discharge of 284 L/m (75 gpm) with the tip of the nozzle at a maximum of 3 meters (10 feet) from the test specimen. (Duration of the hose stream application - 5 minutes for both 1-hour and 3-hour barriers.)138 (45) Penetration openings for ventilation systems should be protected by fire dampers having 139 a rating equivalent to that required of the barrier (see NFPA-90A [Reference 27] , "Air 140 Conditioning and Ventilating Systems" ). Flexible air duct coupling in ventilation and 141 filter systems should be noncombustible. (56) Door openings in fire barriers should be protected with equivalently rated doors, frames, and hardware that have been tested and approved by a nationally recognized laboratory. Such doors should be self-closing or provided with closing mechanisms and should be inspected semiannually to verify that automatic hold-open, release, and closing mechanisms and latches are operable. (See NFPA 80 [Reference 26] , "Fire Doors and 142 Windows." ) 143 One of the following measures should be provided to ensure they will protect the opening as required in case of fire: (a) Fire doors should be kept closed and