Document: NUREG-0800
Document ID: 8ec28e2c-84e9-408b-afcb-1838fbfe7efc
Document Type: srp
Title: ENGINEERED SAFETY FEATURE VENTILATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550041.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.4.5
CFR Part: 
CFR Title: 

Content:
of the system whose failure may result in release of radioactivity which causes an offsite dose of more than 5 mSv (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, design bases, and safety classification for the engineered safety feature ventilation system, and the requirements for system performance to preclude equipment malfunction in the engineered safety feature areas due to a failure of the system during normal, abnormal, and accident conditions, the staff concludes that the design of the ESFVS and supporting systems is acceptable and meets NRC regulations as set forth in GDCs 2, 4, 5, 17, and 60 and 10 CFR 50.63. This conclusion is based on the following findings: 1. The applicant has met the requirements of GDC 2 with respect to the system being capable of withstanding the effects of earthquakes by meeting the guidelines of RG 1.29, "Seismic Design Classification," Position C.1, for safety-related portions of the system and Position C.2 for nonsafety-related portions. 2. The applicant has met the environmental requirements of GDC 4 by appropriately addressing adverse environmental conditions and dynamic effects in the design of the system to ensure its capability for maintaining environmental conditions in areas served by the system within the design limits of the equipment important to safety located in these areas for normal, transient, or accident conditions. 3. The applicant has met the requirements of GDC 5 with respect to capability of shared systems and components important to safety to perform required safety functions since no postulated single active failure will prevent the system from performing its safety function. 4. The applicant has met the requirements of GDC 17 as related to ensuring proper functioning of the essential electric power system by meeting the guidelines of NUREG-CR/0660 as related to the