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:
water beyond the unexposed surface during the hose stream test. The stream shall be delivered through a 3.8 cm (1-1/2-inch) nozzle set at a discharge angle of 126 30% with a nozzle pressure of 517 kPa (75 psi) and a minimum discharge of 127 284 L/m (75 gpm) with the tip of the nozzle a maximum of 1.5 m (5 ft) from 128 129 the exposed face; or the stream shall be delivered through a 3.8 cm (1-1/2-inch)130 DRAFT Rev. 4 - April 1996 9.5.1-36 nozzle set at a discharge angle of 15% 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 131 132 a maximum of 3 m (10 ft) from the exposed face; or the stream shall be 133 delivered through a 6.4 cm (2-1/2-inch) national standard playpipe equipped 134 with 2.9 cm (1-1/8-inch) tip, nozzle pressure of 207 kPa (30 psi) , located 6.1 135 136 m (20 ft) from the exposed face. 137 (4) Fire endurance qualification tests for fire barrier materials applied directly to a raceway or component are acceptable if the following conditions are met (Reference 48): (a) The average unexposed side temperature of the fire barrier system, as measured on the exterior surface of the raceway or component, did not exceed 139 C (250 F) above its initial temperature; and (b) Irrespective of the unexposed side temperature rise during the fire test, if cables or components are included in the fire barrier test specimen, a visual inspection should be performed. Cables should not show signs of degraded conditions (e.g., jacket swollen, split, cracked, blistered, melted, or discolored; shield exposed; conductor insulation exposed, degraded, or discolored; bare copper conductor exposed) resulting from the thermal affects of the fire exposure; and (c) The cable tray, raceway, or component fire barrier system remained intact during the fire exposure and water hose stream test without developing any openings through which the cable tray, raceway, or component (e.g., cables) is visible. NFPA 251 and ASTM