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:
nce criteria given in subsection II. The reviewer will select and emphasize material from this SRP section as may be appropriate for a particular case. 1. The SAR is reviewed to verify that the system description and piping and instrumentation diagrams (P&IDs) show the TAVS equipment used for normal and emergency operations, and the ambient temperature limits for the areas serviced. The system performance requirements are reviewed to determine that it describes allowable component operational degradation (e.g., loss of function, damper leakage) and describes the procedures that will be followed to detect and correct these conditions. The reviewer, using results from failure modes and effects analyses as appropriate, determines that the system is capable of sustaining the failure of any active component that is required for the prevention of unacceptable releases of radioactive contaminants to the environment. safety-related portion of the system is capable of functioning in spite of the loss of any active component.58 The system review should also demonstrate conformance with applicable industry standards: ANSI/ANS-59.2-1985, "Safety Criteria for Nuclear Power Plant HVAC Systems Located Outside Primary Containment," and ANSI/ASME AG-1-1985, "Code on Nuclear Air and Gas Treatment."59 2. The system P&IDs, layout drawings, and component descriptions and characteristics are then reviewed to determine that: a. Essential portions of the TAVS are correctly identified and are isolable from nonessential portions of the system. The P&IDs are reviewed to verify that they clearly indicate the physical divisions between each portion and indicate changes in design classification changes. System drawings are also reviewed to verify that they show the means provided for accomplishing isolation, and the system description is reviewed to identify minimum performance requirements for the 60 isolation dampers. For the typical system, the drawings and description are reviewed to verify