Document: NUREG-0800
Document ID: bc7e4c14-0eaa-4591-a506-23d7893f8a00
Document Type: srp
Title: as establishing acceptable guidance for meeting the requirements of this criterion.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070498.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
Meeting the requirements of GDC 18 provides assurance that, when required, onsite power systems can be appropriately and unobtrusively accessed for required periodic 8.3.1-13 DRAFT Rev. 3 - April 1996 inspection and testing, enabling verification of important system parameters, performance characteristics, and features and detection of degradation and/or impending failure under controlled conditions.81 6. 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 33, 34, 35, 38, 41, and 44 require safety system redundancy such that, for onsite power system operation (assuming offsite power is unavailable), the system safety function can be accomplished, assuming a single failure. Redundancy must be reflected in the standby power system with regard to both power sources and associated distribution systems. Also, redundant safety loads must be distributed between redundant distribution systems, and the instrumentation and control devices for the Class 1E loads and power system must be supplied from associated redundant distribution systems. For the ac power system, these requirements are met if the minimum design required by GDC 17 is provided. Meeting the requirements of these criteria as encompassed by GDC 17 provides assurance that required electric power will be provided for all facility operating modes, including transients and design basis accidents so that the safety functions required in these criteria may be performed,