Document: NUREG-0800
Document ID: 52c595ba-bbc6-4bf7-8b9c-e72d77d3a95b
Document Type: srp
Title: AUXILIARY AND RADWASTE AREA VENTILATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070543.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.4.3
CFR Part: 
CFR Title: 

Content:
AVS equipment used for normal 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 are adequately described. The reviewer, using results from failure modes and effects analyses as 57 9.4.3-7 DRAFT Rev. 3 - April 1996 appropriate, determines that the safety-related portion of the system is capable of functioning in spite of the failure of any active component. 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."58 2. The system P&IDs, layout drawings, and component descriptions and characteristics are then reviewed to determine that: a. Essential portions of the ARAVS 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 such portions and indicate design classification changes. System drawings are also reviewed to verify that they show the means for accomplishing isolation, and the system description is 59 reviewed to identify minimum performance requirements for the isolation dampers. For the typical system, the drawings and description are reviewed to verify that two automatically operated isolation dampers in series separate nonessential portions and components from the essential portions. b. Essential portions of the ARAVS, including the isolation dampers separating essential from nonessential portions, are classified seismic Category I. Component and system descriptions in the SAR that identify mechanical and performance characteristics are reviewed to verify that