Document: NUREG-0800
Document ID: b4dc2da5-bdfa-4120-9cf3-b2918a366a3e
Document Type: srp
Title: CONTROL ROOM AREA VENTILATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350557.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.4.1
CFR Part: 
CFR Title: 

Content:
em (CRAVS) includes all com- ponents and ducting from the intake vents to the exhaust structure. All portions of the system whose failure may result in release of radioactivity which causes an offsite dose of more than 0.5 rem to the whole body or its equivalent to any part of the body are classified seismic Category I and safety related. Based on the review of the applicant's proposed design criteria, the design bases, and safety classification for the control room area ventilation system, and the requirements for system performance to maintain a suitable environment during normal, abnormal, and accident conditions,.the staff concludes that the design of the control room area ventilation 9.4.1-6 Rev. 2 - July 1981 system and auxiliary supporting systems 'is in conformance with the Commission's regulations as set forth in General Design Criteria 2, 4, 5, 19, and 60. This conclusion is based on the following: 1. The applicant has met the requirements of General Design Criterion 2, "Design Bases for Protection Against Natural Phenomena," with respect to the system being capable of with- standing the effects of earthquakes by meeting the guidelines of Regulatory Guide 1.29, "Seismic Design Classification," position C.1 for safety-related portions of the system and position C.2 for nonsafety-related portions of the system. 2. The applicant has met the requirements of General Design Criterion 4, "Environmental and Missile Design Basis," by maintaining environmental conditions in the control room within the design limits of the essential equipment located therein for normal, transient, or accident conditions. 3. The applicant has met the requirements of General Design Criterion 5, "Sharing of Structures, Systems, and Components Important to Safety to Perform Required Safety Functions," with respect to capability of shared systems and components important to safety to perform required safety functions. 4. The applicant has met the requirements of General Design Criterion