Document: NUREG-0800
Document ID: a2680f96-0e15-402d-89ab-688ff09806a8
Document Type: srp
Title: with respect to the specified station blackout event/duration.13
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070497.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.2
CFR Part: 
CFR Title: 

Content:
elays, switches, and buses, and (2) 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. This criterion requires that the ac power system provide the capability to perform integral testing on a periodic basis. Meeting the requirements of GDC 18 provides assurance that, when required, 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.55 4. General Design Criteria 33, 34, 35, 38, 41, and 44 set forth requirements for the safety systems for which the access to both offsite and onsite power sources must be provided. Compliance with these criteria requires that capability be provided for reactor coolant makeup during small breaks, residual heat removal, emergency core cooling, containment heat removal, containment atmosphere cleanup, and cooling water for structures, systems, and components important to safety. These systems must be available during normal and accident conditions, as required by the specific system. General Design Criteria 34, 35, 38, 41, and 44 require that safety system redundancy shall be such that, for preferred power system operation (if standby power is not available), the system safety function can be accomplished assuming a single failure. GDC 33 requires that system design shall be such that, for preferred power system operation (if standby power is not available), the system safety function can be accomplished using the piping, pumps, and valves to maintain coolant inventory during normal reactor operations. For the