Document: NUREG-0800
Document ID: 6cd85972-0d5c-413b-9587-fbbfd5521c9f
Document Type: srp
Title: COMPRESSED AIR SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070525.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.1
CFR Part: 
CFR Title: 

Content:
gory I plant feature to an unacceptable safety level, or could result in incapacitating injury to occupants of the control room, should be designed and constructed so that the SSE would not cause such failure. Compliance with Regulatory Guide 1.29, Positions C.1 and C.2, assures that the ICAS will remain functional during an earthquake and provide compressed air necessary for the actuation and control of safety-related equipment.63 3. GDC 5 prohibits the sharing of structures, systems and components among nuclear power units unless it can be shown that such sharing will not significantly impair their ability to perform their safety functions, including, in the event of an accident in one unit, an orderly shutdown and cooldown of the remaining units. The ICAS provides compressed air or nitrogen required to actuate or control equipment that perform safety-related functions during normal operations, transients, or accidents. The ICAS needs to be designed such that the ability of systems and components to perform these safety-related functions are not compromised for each unit regardless of compressed air system equipment failures or other events that may occur in another unit. Meeting the requirements of GDC 5 provides assurance that unacceptable effects of equipment failures or other events occurring in one unit of a multi-unit site will not propagate to the unaffected unit(s).64 4. 10 CFR 50.63 requires that each light-water-cooled nuclear power plant licensed to operate must be able to withstand for a specified duration and recover from a station blackout. Depending on the design-specific approach for demonstrating the ability to withstand and recover from a station blackout, the compressed air system may provide compressed air or nitrogen to actuate or control equipment necessary to provide core cooling and decay heat removal or maintain containment integrity following a station blackout. Regulatory Guide 1.155 describes a method acceptable to the NRC staff for