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:
tion, 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 combustible materials that could impact equipment important to safety should be considered in the cable system design and associated fire protection features. In addition to electrical cables, transformers and electrical cabinets also present a fire hazard to equipment important to safety. Transformers and electrical cabinets should be protected as described in Regulatory Guide 1.189. 7.1.5 HVAC Design Means to ventilate, exhaust, or isolate the fire area should be provided as determined by the fire hazards analysis. The analysis should also consider the consequences of ventilation system failure caused by the fire and the effects on structures, systems and components important to safety from the loss of capability to ventilate, exhaust, or isolate a given fire area. Considerations in evaluating ventilation systems and components under fire conditions include: a. Routing of ventilation power and control cables relative to the fire areas served by the system. b. Control of the potential release of radioactive materials entrained in products of combustion (e.g., smoke and gases), including consequences of ventilation system and component failures. c. Separation of supply air intakes for equipment important to safety from exhaust and smoke vents or outlets, and from exterior fire exposure hazards. d. Effects of ventilation on fire suppression systems (e.g., total flooding gaseous systems). e. Combustibility of filter media and potential for fire damage to filters and consequential impacts on radioactive material control. f. Smoke and heat removal and/or control to support firefighting and safe shutdown operations. g. Capability to maintain habitability of areas occupied or traversed by plant operations staff in performing safe shutdown operations, including the control