Document: NUREG-0800
Document ID: 9f13abda-ee55-4fa1-8276-db55ac2094ef
Document Type: srp
Title: CONTROL ROOM HABITABILITY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070449.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.4
CFR Part: 
CFR Title: 

Content:
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.41 2. Compliance with GDC 5 requires that structures, systems, and components important to safety shall 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 must 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 operators and essential equipment in the control room will be able to continue functioning effectively throughout the course of the event. In this manner, an event at one unit will be prevented from propagating to another unit. Meeting the requirements of GDC 5 provides assurance that a failure in one unit of a multiple-unit site will not affect an orderly shutdown and cooldown in remaining units.42 3. Compliance with GDC 19 requires that the control room remain functional so that actions can be taken (a) to operate the nuclear power unit safely under normal conditions and (b) to maintain the plant in a safe state under accident conditions, including LOCAs. GDC 19 applies to this SRP section because the reviewer verifies that adequate radiation protection and protection from hazardous chemical releases will be provided to permit access to and occupancy of the control room