Document: NUREG-0800
Document ID: 3263aa5f-b2bf-46fe-b625-e0ffd142404d
Document Type: srp
Title: TURBINE AREA VENTILATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070557.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.4.4
CFR Part: 
CFR Title: 

Content:
the system are reviewed with respect to functional performance requirements during adverse environmental DRAFT Rev. 3 - April 1996 9.4.4-2 occurrences, during normal operation, anticipated operational occurrences, and 11 subsequent to postulated accidents, including the loss of offsite power. The ASB SPLB12 reviews safety-related portions of the system to assure 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 result in unacceptable releases of radioactive contaminants affect the TAVS.13 2. The ASB SPLB also reviews safety-related portions of the TAVS with respect to the 14 following: a. The capability of the system to direct ventilation air from areas of low 15 radioactivity to areas of higher radioactivity levels. b. The capability to detect the need for isolation and to isolate safety-related portions of the system in the event of failures or malfunctions, and the capability of the isolated system to function under such conditions. 16 c. The capability to actuate components not normally operating that are required to operate during accident conditions and to provide necessary isolation.17 3. The ASBSPLB also performs the following reviews as part of its primary review 18 responsibility under the SRP sections indicated: 19 a. Review of flood protection is performed under SRP Section 3.4.1. b. Review of the protection against internally generated missiles is performed under SRP Section 3.5.1.1. c. Review of the structures, systems, and components to be protected against externally generated missiles is performed under SRP Section 3.5.2. d. Review of high- and moderate-energy pipe breaks is performed under SRP Section 3.6.1. e. Review of the environmental qualification of mechanical and electrical equipment is performed under SRP Section 3.11.20 f. Review of the effectiveness of the TAVS filters to remove airborne contaminants prior to