Document: NRC Regulatory Guide
Document ID: 8e45dce1-e1e7-4415-b1dd-7e2a610e545b
Document Type: regulatory_guide
Title: Fire Protection for Nuclear Power Plants (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2023/ML20231A835.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.189
CFR Part: 
CFR Title: 

Content:
hose stream test. b. Penetration fire barriers: An independent testing authority should qualify penetration fire barriers by tests conducted in accordance with NFPA 251 or ASTM E119. In addition, ASTM E814, “Standard Test Method for Fire Tests of Penetration Firestop Systems” (Ref. 112), or IEEE Standard 634, “IEEE Standard Cable Penetration Fire Stop Qualification Test” (Ref. 113), could be used in the development of a standard fire test. ANSI withdrew IEEE Standard 634 on April 9, 1990, and the standard should not be used for qualification testing performed after that date. The barrier should meet the following criteria (1) The fire barrier design has withstood the fire endurance test without passage of flame or the ignition of cables on the unexposed side for a period of time equivalent to the fire-resistance rating required of the barrier. (2) The temperature levels recorded for the unexposed side of the fire barrier are analyzed and demonstrate that the maximum temperature does not exceed 163 degrees C (325 degrees F) or 121 degrees C (250 degrees F) above the ambient temperature. Higher temperatures at through-penetrations may be permitted when justified in terms of cable insulation ignitability. (3) The fire barrier remains intact and does not allow projection of water beyond the unexposed surface during the hose stream test. The stream should be delivered (1) through a 38-mm (1.5-in.) nozzle set at a discharge angle of 30 percent with a nozzle DG-1359, Page 71 pressure of 517 kilopascals (kPa) (75 pounds per square inch (psi)) and a minimum discharge of 284 L/min (75 gal/min) with the tip of the nozzle a maximum of 1.5 m (5 ft) from the exposed face, or (2) through a 38-mm (1.5-in.) nozzle set at a discharge angle of 15 percent with a nozzle pressure of 517 kPa (75 psi) and a minimum discharge of 284 L/min (75 gal/min) with the tip of the nozzle a maximum of 3 m (10 ft) from the exposed face, or (3) through a 64-mm (2.5-in.) national standard