Document: NUREG-0800
Document ID: f430fab5-dea3-4bc8-99ea-3bdf995735cd
Document Type: srp
Title: COMPRESSED AIR SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350551.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.1
CFR Part: 
CFR Title: 

Content:
e air system and a safety-related compressed air system (SRCAS). For cases where there are variations from this arrangement, the reviewer adjusts the review procedures given below. However, the system design would be required to meet the recommendations and requirements in subsection II of this SRP section. The reviewer will select and emphasize material from this SRP section as appropriate for a particular case. 1. The SAR is reviewed to identify from information in the system description section and the piping and instrumentation diagrams (P&IDs) the SRCAS equip- ment used for normal operation and for safety feature operation. The reviewer determines that the systems affected by the loss of offsite power and subsequent loss of air supply will fail in a safe position. 2. The system P&IDs, layout drawings, and component descriptions and char- acteristics are reviewed to determine the following: a. Essential portions of the SRCAS are correctly identified and are isolable from the nonessential portions of the system. The P&IDs are reviewed to verify that they clearly indicate the physical divi- sion between each portion. System drawings are also reviewed to verify that they show the means for accomplishing isolation and the system description is reviewed to identify minimum performance requirements of the isolation valves. For the typical system, the drawings and descriptions are reviewed to verify that two automatically operated isolation valves in series.separate the nonessential from the essential portions and components. b. Essential portions of the SRCAS, including the isolation valves sepa- rating essential from nonessential portions, are classified Quality Group C and seismic Category I. Component and system descriptions in the SAR that identify mechanical and performance characteristics are reviewed by the ASB to verify that the above classifications have been included1 and that the P&IDs indicate points of change in any design classification. The review for