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:
ld install penetration seals. Appropriate QA/QC methods should be in force during installation. As part of the installation process, penetration seals should be specifically labeled and documented and then inspected to ensure that the seal does not have voids or gaps and has been installed in accordance with its design. DG-1359, Page 70 4.2.1.5 Testing and Qualification a. Structural fire barriers: The design adequacy of fire barrier walls, floors, ceilings, and enclosures should be verified by fire endurance testing. The NRC fire protection guidance refers to NFPA 251 and ASTM E119, “Standard Test Methods for Fire Tests of Building Construction and Materials” (Ref. 111), as presenting acceptable test methods for demonstrating fire endurance performance. The guidance of NFPA 251 and ASTM E119 should be consulted with regard to construction, materials, workmanship, and details such as dimensions of parts and the size of the specimens to be tested. In addition, NFPA 251 and ASTM E119 should be consulted with regard to the placement of thermocouples on the specimen. The following are the fire endurance test acceptance criteria that wall, floor, ceiling, and enclosure fire barriers should meet: (1) The fire barrier design has withstood the fire endurance test without the passage of flame or the ignition of cotton waste on the unexposed side for a period of time equivalent to the fire-resistance rating required of the barrier. (2) The temperature levels recorded on the unexposed side of the fire barrier are analyzed and demonstrate that the maximum temperature does not exceed 121 degrees Celsius (C) (250 degrees Fahrenheit (F)) above the ambient atmosphere. (3) The fire barrier remains intact and does not allow projection of water beyond the unexposed surface during the 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