Document: NUREG-0800
Document ID: 76205ba0-6d0f-463f-b38b-37cc41a9b7ec
Document Type: srp
Title: COMPRESSED AIR SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550044.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.1
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of air systems Secondary - None I. AREAS OF REVIEW The compressed air system (CAS) provides compressed air to station service equipment and to safety-related and nonsafety-related equipment. There may be two systems or subsystems, an instrumentation and control air system (ICAS) which provides control air to safety-related and nonsafety-related components and systems and a station service air system (SSAS) which provides compressed air to nonsafety-related service equipment (e.g., pneumatic tools, cleaning, etc.). If the two systems are interconnected, the area of review includes the ICAS to the outermost isolation valve on all interconnections between the two systems. The review also evaluates the quality of the compressed air provided by the SSAS to the ICAS, if the SSAS is used as a back up source for the ICAS. If the systems are not connected, review is limited to the ICAS. The portions of the CAS described above are reviewed for compliance with 10 CFR 50, appendix A, General Design Criteria (GDCs) 1, 2, and 5 and 10 CFR 50.63. The specific areas of review are as follows: 1. The ICAS is reviewed for whether safety-related portions of the system are correctly identified and can be isolated from the nonsafety-related portions. 2. The ICAS is reviewed for whether the effects of failure of the nonsafety-related portions or nonseismic Category I equipment or components preclude operation of ICAS safety-related portions. 9.3.1-2 Revision 2 - March 2007 3. The systems are reviewed for safety-related and nonsafety-related air-operated devices supplied by the ICAS and whether each requires a source of supply air to perform safety-related functions. 4. The systems are reviewed for whether a failure of a component or the loss of a compressed air source prevents any safety-related system, subsystem, or device from performing safety-related functions. 5. The ICAS design is reviewed for the following: