Document: NUREG-0800
Document ID: 9aa9f059-274f-4f61-8c7e-88e13eb69bd0
Document Type: srp
Title: CONTROL ROOM AREA VENTILATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070540.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.4.1
CFR Part: 
CFR Title: 

Content:
1.95 provide guidance acceptable to the staff for meeting these control room occupancy protection requirements. DRAFT Rev. 3 - April 1996 9.4.1-8 Meeting the requirements of GDC 19 provides assurance that access to and occupancy of the control room will be protected under accident conditions.58 5. Compliance with GDC 60 requires that the nuclear power unit design include provisions to control the release of radioactive materials entrained in gaseous effluents during normal reactor operation, including anticipated operational occurrences. Regulatory Guides 1.140 and 1.52 offer design, testing, and maintenance criteria acceptable to the staff for air filtration and adsorption units of normal ventilation exhaust systems and for atmosphere cleanup systems in light-water-cooled nuclear power plants. Atmosphere cleanup systems are included in the design to reduce the quantities of radioactive materials entrained in gaseous effluents that are released to the environment. Meeting the requirements of GDC 60 provides assurance that release of radioactive materials entrained in gaseous effluents will not exceed the limits specified in 10 CFR Part 20 for normal operation and anticipated operational occurrences.59 6. Compliance with 10 CFR 50.63 requires a demonstration of the capability of a nuclear power plant to withstand and recover from a station blackout (i.e., loss of offsite electric power system concurrent with reactor trip and unavailability of the onsite emergency ac electric power system). A station blackout analysis covering a minimum acceptable duration (either to withstand the event until an alternate ac source and shutdown systems are lined up for operation or to cope with it for its duration, including the associated recovery period) is required. Regulatory Guide 1.155 provides guidance for complying with station blackout requirements. Regardless of the extent, if any, to which the CRAVS is expected to function to maintain suitable environmental conditions