Document: NUREG-0800
Document ID: 1c401e6c-8c2d-47df-b05f-2978939cbd15
Document Type: srp
Title: CONTROL ROOM HABITABILITY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550069.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.4
CFR Part: 
CFR Title: 

Content:
ffects (e.g., the effects of missiles, pipe whipping, and discharging fluids) that may result from equipment failures and from events and conditions outside the nuclear power unit. The function of the control room habitability system is to provide a suitable and controlled environment for the control room and equipment located therein during normal operation, anticipated operational occurrences, and during and after postulated accidents, including LOCAs. GDC 4 applies to this SRP section because the reviewer verifies that the control room will remain functional throughout the course of operating and accident events and that operators will be able to carry out their responsibilities without being subject to undue stress. Meeting the requirements of GDC 4 provides assurance that the control room habitability system will function as designed, thereby providing protection to plant operators against the effects of accidental releases of toxic and radiological gases. 6.4-9 Revision 3 - March 2007 2. Compliance with GDC 5 requires that structures, systems, and components important to safety not be shared among nuclear power units unless it can be shown that such sharing will not significantly impair their ability to perform their safety functions, including, in the event of an accident in one unit, an orderly shutdown and cooldown in the remaining units. For a multiple-unit facility in which there is a common control room, components of the control room habitability system will necessarily be shared; whereas, for a multiple-unit facility in which there are separate control rooms, components of the control room habitability system need not be shared. For either design, it should be demonstrated that the operating environment of control areas for each unit remains within specified limits in the event of an accident or toxic gas release, thereby ensuring that control room operators and essential equipment in the control room will be able to continue functioning effectively