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:
ptable verification of system functional reliability. In addition, the reviewer determines whether the equipment affected by the loss of offsite power and subsequent loss of air supply fails in a safe position. B. Station Blackout. The review of station blackout is under RG 1.155 and coordinated with station blackout review under SRP Section 8.4 (proposed). If ICAS capability and capacity are sufficient for plant ability to withstand, cope with (for the specified duration), and recover from station blackout, the system is deemed acceptable. If ICAS capability or capacity is not sufficient, RG 1.155, Positions 3.3.3 and 3.5, are additional guidance. 5. The reviewer verifies whether an adequate maintenance, periodic testing, and surveillance program ensures continuous reliable CAS functioning. The reviewer also verifies whether design provisions for appropriate periodic ICAS pressure, leakage, air quality, and functional testing are adequate to assure the structural integrity, leak-tight ability, operability, and performance of the active components and capability of the 9.3.1-9 Revision 2 - March 2007 system to function as intended during design-basis events, loss of offsite power, or station blackout. 6. The descriptive information, P&IDs, ICAS drawings, and SAR failure modes and effects analyses are reviewed for whether the CAS ICAS portion functions following design-basis accidents, assuming a concurrent, single, active failure. The reviewer evaluates the SAR information for the ability of required components to function, traces the availability of these components on system drawings, and checks that the SAR verifies whether minimum compressed air flow requirements are met for each degraded situation for the required duration. In addition, the reviewer checks the following to verify whether air-operated components function as intended during design-basis events, loss of offsite power, or station blackout: A. The ICAS functional design, including air or nitrogen