Document: NUREG-0800
Document ID: 05a851a6-07ff-41b4-8528-a032ba433e04
Document Type: srp
Title: FIRE PROTECTION PROGRAM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0327/ML032740044.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.1
CFR Part: 
CFR Title: 

Content:
th requirements in GDC 3. Walls, floors, roofs, including structural materials, suspended ceilings, thermal insulation, radiation shielding materials, and soundproofing and interior finishes should be noncombustible. Materials and interior finishes should meet the criteria in Regulatory Guide 1.189 for non-combustibility, including qualification and testing requirements. In situ combustible materials used in plant structures systems and components should be identified in the fire hazard analysis and suitable fire protection should be specified. 7.1.4 Electrical System Fire Protection Design Electrical cables are a significant source of combustible material in nuclear power plants. Cable trays and open raceways provide means by which fire can ignite and propagate exposing redundant cable systems and other equipment important to safety to fire-induced failure. Electrical cables should meet flame test criteria of IEEE 383 or 1202, or be provided with alternative protection as allowed by the specific plant licensing and/or design basis (See Regulatory Guide 1.189). Cable tray and raceway construction should be metal. Fire detection and suppression capability should be provided for electrical cable systems and described in the fire hazards analysis. Considerations in determining the level of protection should include the adequacy of separation of redundant cable systems by rated fire barriers. Fire detection should be installed in all areas containing cables systems important to safety and fire suppression capability should be available in areas containing redundant cables and cable trays important to safety, or areas containing non-safety structures, systems, and components that could expose redundant Revision 4 - October 2003 28 safe shutdown systems. Cable separation, manual and/or automatic suppression should be specified in accordance with the guidelines of Regulatory Guide 1.189. The potential for cable systems to cause ignition of adjacent cables or other