Document: NUREG-0800
Document ID: ac4cde5a-7464-48b8-9067-860c672cbb68
Document Type: srp
Title: STATION BLACKOUT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550061.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.4
CFR Part: 
CFR Title: 

Content:
ly will be provided for all facility operating modes, including anticipated operational occurrences and DBAs, to permit the performance of safety functions and other vital functions, even in the event of a single failure. SRP Sections 8.1, 8.2, 8.3.1, and 8.3.2 contain additional information related to the review of compliance with GDC 17. 2. Compliance with GDC 18 requires that electric power systems important to safety be designed to permit appropriate periodic inspection and testing of key areas and features to assess their continuity and the condition of their components. These systems shall be designed to test periodically (a) the operability and functional performance of the components of the systems, such as onsite power sources, relays, switches, and buses, and (b) the operability of the systems as a whole and, under conditions as close to design as practical, the full operation sequence that brings the systems into operation, including operation of applicable portions of the protection system, and the transfer of power among the nuclear power unit, the offsite power system, and the onsite power system. Consequently, the ac power system must provide the capability to perform integral testing on a periodic basis. Meeting the requirements of GDC 18 provides assurance that, when necessary, offsite power systems can be appropriately and unobtrusively accessed for required periodic inspection and testing, enabling verification of important system parameters, performance characteristics, and features and detection of degradation and/or impending failure under controlled conditions. 3. Compliance with 10 CFR 50.63 requires that each light-water-cooled NPP be able to withstand and recover from an SBO (as defined in 10 CFR 50.2 (Ref. 1)). Meeting the requirements of 10 CFR 50.63 provides assurance that the NPP will be able to withstand (cope with) and recover from an SBO and will ensure that core cooling and appropriate containment integrity are maintained. 8.4-7