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:
w reactor designs should be based on the fire hazards analysis. c. At least one new reactor design has been certified by the NRC without meeting the guidance in RG 1.189, Regulatory Position 6.1.2, to provide automatic water suppression in peripheral rooms in the control room complex. The acceptance of this approach was based on the low combustible loading in these areas and on the continuous occupancy of the control room, which allows rapid detection and response to a fire in the control room complex. Acceptance of a similar alternative design for other new reactor designs should be based on the fire hazards analysis. d. The standpipes and hose stations serving the ESBWR containment are located outside of the containment (the acceptance criteria in RG 1.189, Regulatory Position 6.1.1.2, 9.5.1.1-21 Revision 0 – February 2009 state that the standpipe and hose stations should be located outside of the drywell). The staff found this arrangement to be acceptable because it provided the capability to reach all areas inside the containment with at least one hose stream. The ESBWR containment is inerted during normal power operation and there are multiple access hatches around the perimeter of the containment. This arrangement may also be acceptable for other new reactor designs with inerted containments if the staff finds access and hose station capability is acceptable. 8.2 Non-Applicable Acceptance Criteria a. In at least one new reactor design (ESBWR), the standby diesel generators are not required for safe shutdown. If these diesel generators are not important to safety, the guidance in RG 1.189 for diesel generator rooms is not applicable (unless the fire hazards analysis identifies an exposure hazard from the diesel generator room to adjacent areas containing equipment or cables important to safety). The staff should consider the diesel generators= importance to safety, as well as the potential impact on adjacent SSCs, when reviewing the fire protection provisions