Document: NUREG-0800
Document ID: 2b0752f4-9104-408c-b400-d0ec931a3dbf
Document Type: srp
Title: FIRE PROTECTION PROGRAM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350030.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.1
CFR Part: 
CFR Title: 

Content:
resistance of 3 hours. (9) Interior wall and structural components, thermal insulation materials, radiation shielding materials, and soundproofing should be noncombustible. Interior finishes should be non-combustible. Materials that are.acceptable for use as interior finish without evidence of test and listing by a nationally recognized laboratory are the following: * Plaster, acoustic plaster, gypsum plasterboard (gypsum wallboard), either plain, wallpapered, or painted with oil- or water-base paint; * Ceramic tile, ceramic panels; * Glass, glass blocks; * Brick, stone, concrete blocks, plain or painted; * Steel and aluminum panels, plain, painted, or enameled; * Vinyl tile, vinyl-asbestos tile, linoleum, or asphalt tile on concrete floors. 9.5.1-30 Rev. 2 - July 1981 (10) Metal deck roof construction should be noncombustible and listed as "acceptable for fire" in the UL Building Materials Directory, or listed as Class I in the Factory Mutual System Approval Guide. (11) Suspended ceiling and their supports should be of noncombustible construction. Concealed spaces should be devoid of combustibles except as noted in Position C.6.b. (12) Transformers installed inside fire areas containing safety-related systems should be of the dry type or insulated and cooled with noncombustible liquid. Transformers filled with combustible fluid that are located indoors should be enclosed in a transformer vault (see Section 450(c) of NFPA 70, "National Electrical Code"). (13) Outdoor oil-filled transformers should have oil spill confinement features or drainage away from the buildings. Such transformers should be located at least 50 feet distant from the building, or by ensuring that such build- ing walls within 50 feet of oil-filled transformers are without openings and have a fire resistance rating of at least 3 hours. (14) Floor drains sized to remove expected firefighting waterflow without flood- ing safety-related equipment should be provided in those areas where fixed water