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:
lternate or dedicated shutdown capability. As noted in Section 2.3, alternate or dedicated shutdown may require manual operator actions to be taken from remote operating stations, local panels, and/or individual equipment locations. The analysis must demonstrate that the manual actions are sufficient to achieve the safe shutdown functions and can be performed within the time constraints necessary to ensure that safe shutdown performance objectives are met. Procedures describing the necessary operator actions to accomplish alternate or dedicated shutdown should be described in the analysis. 2.5 Cold Shutdown For operating reactors, safe shutdown systems and components necessary to achieve and maintain cold shutdown conditions need not be protected from fire damage; however, the capability to make repairs to cold shutdown systems and to achieve cold shutdown within established time constraints must be demonstrated (see Regulatory Guide 1.189, Regulatory Position 5.4). Tools and equipment for repair of cold shutdown systems and components must be available on-site. Procedures must be established as necessary to accomplish the repairs. When repairs are necessary in the fire area, the licensee or applicant should demonstrate that sufficient time is available to allow the area to be re-entered, that expected fire and fire suppressant damage will not prevent the repairs from taking place, and that the repair procedures will not adversely impact operating systems. 2.6 Station Blackout for Safe Shutdown Several operating plant licensees have alternative post-fire safe shutdown methodologies that may result in loss of all ac power (i.e., station blackout). Some of these plants voluntarily enter station blackout (SBO) as a means to cope with the potential for spurious operations and to provide positive (manual) control of safe shutdown equipment. Others have procedures that may cause a SBO condition to be created as a result of fire effects (e.g., procedures that direct