Document: NUREG-0800
Document ID: 757f66f9-1dd5-4125-9970-089087134ad9
Document Type: srp
Title: FIRE PROTECTION PROGRAM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0905/ML090510170.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.1.1
CFR Part: 
CFR Title: 

Content:
t-fire, safe-shutdown circuit analysis should be greatly simplified, reducing the potential for errors. e. Full train separation should significantly reduce security concerns associated with a fire by reducing access needs. 9.5.1.1-19 Revision 0 – February 2009 f. Extensive use of fiber optics should greatly reduce the likelihood of hot shorts and spurious actuations - this development is particularly significant in the control room where full separation of trains is not possible. g. Use of fiber optics also reduces the fire area combustible loadings and thus the challenge to fire barriers. h. The enhanced fire protection approach should greatly reduce the importance and scope of fire protection issues that are contentious for existing reactors such as operator manual actions and multiple spurious actuations. i. The concept of alternative/dedicated shutdown systems, widely used in current reactors, should be virtually eliminated for new reactors (except for a control room or containment fire). j. Enhanced fire protection attention to smoke migration and smoke damage should reduce the contribution of these phenomena to overall fire risk. k. The increased level of passive protection necessary for new reactor designs reduces the potential contribution to overall fire risk from delay in applying water to electrical fires. l. Use of digital control systems greatly reduces the number and size of electrical cabinets in the control room, reducing (likely to a significant extent) the fire ignition frequency in this critical area. m. Where used, gel-type batteries may virtually eliminate the hydrogen gas explosion hazard in plant battery rooms. n. Reactors with passive shutdown systems have reduced combustible loading, reduced ignition sources, and reduced potential for fire-induced equipment failure. o. Use of polyvinyl chloride and other non-IEEE 1202 rated cable jacketing and insulation should be minimized. p. The Advanced Boiling Water Reactor (ABWR) and the Economic