Document: NUREG-0800
Document ID: 50c5f9b6-d85c-4012-a8e9-48eaaafff93e
Document Type: srp
Title: CONTROL ROOM AREA VENTILATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550045.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.4.1
CFR Part: 
CFR Title: 

Content:
onents, traces the availability of these components on system drawings, and checks that the SAR contains verification that minimum system isolation or filtration requirements are met for each accident situation for the required time spans. For each case the design will be acceptable if minimum system requirements are met. 5. The reviewer verifies that a suitable environment is demonstrated to be maintained in areas served by the CRAVS for the duration of a station blackout event and the associated recovery period with or without credit for CRAVS operation, as applicable. Where applicable, the functionality of equipment necessary to cope with the event under the expected environmental conditions and the habitability of areas where operator actions are performed should be appropriately addressed during the review as described in RG1.155, position C.3.2.4. Where the CRAVS (or portions thereof) is credited to function for coping with a station blackout, the reviewer verifies that the CRAVS has been designed so that system functions will be performed as required in the event of a station blackout, that the CRAVS has sufficient capacity and capability to maintain a suitable environment for the duration of a station blackout event and the associated recovery period, and that failure of non-required portions of the CRAVS will not adversely affect the functioning of required equipment. As necessary, the reviewer interfaces with other reviewers responsible for SRP Sections 7.3.1 and 8.3.1 as described in subsection I to evaluate the instrumentation and electrical provisions for CRAVS functionality in the event of a station blackout and also to ensure that appropriate control room-area instrumentation and electrical equipment environmental limits have been considered. 6. For review of a DC application, the reviewer should follow the above procedures to verify that the design, including requirements and restrictions (e.g., interface requirements and site parameters), set forth