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:
nt to postulated accidents. The review includes the effects of radiation, combustion and other toxic products, and the coincidental loss of offsite power. The review of this Standard Review Plan (SRP) section is closely associated with the review conducted for SRP Section 6.4, "Control Room Habitability." The ASB SPLB reviews safety-related portions of the system to assure 11 12 ensure that: a. A single active failure cannot result in loss of the system functional performance capability. b. Failures of nonseismic Category I equipment or components will not affect the CRAVS. 2. The ASB also SPLB reviews safety-related portions of the CRAVS with respect to the 13 following: a. The ability of the control room heating and cooling subsystems to maintain a 14 suitable ambient temperature for control room personnel and equipment. b. The ability to detect, filter, or expedite safe discharge of airborne contaminants inside the control room. c. The provisions for the detection and isolation of capability to detect the need for isolation and to isolate portions of the system in the event of fires, failures, or malfunctions, and the capability of the system to function under such conditions.15 d. The ability of essential equipment being serviced by the ventilation system to function under the worst anticipated degraded CRAVS performance. e. The capability to actuate components not normally operating that are required to operate during accident conditions, and to provide necessary isolation.16 3. The SPLB reviews the expected environmental conditions in areas served by the CRAVS and the extent, if any, to which the CRAVS is relied upon to function for a station blackout event.17 Review Interfaces18 3. The ASB also SPLB also performs the following reviews as part of its primary review 19 responsibility under the SRP sections indicated: 20 a. Review of flood protection is performed under SRP Section 3.4.1. b. Review of the protection against internally generated missiles is