Document: NUREG-0800
Document ID: 9cfc38bf-7808-446e-a43d-4ca9ff55df2a
Document Type: srp
Title: AC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740289.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
2 hours. However, in accordance with SECY-94-084, SECY-95-132, and RG 1.206 Section C.IV.10, ac power system features will be evaluated using the process for regulatory treatment of non-safety systems (RTNSS) for electrical distribution issues on passive designs. The AP1000 passive plant DC, for example, includes an exemption to the requirement of GDC 17 for two physically independent offsite circuits, by providing safety-related passive safety systems for core cooling and containment integrity. However, even for this design, one offsite power source with sufficient capacity and capability from the transmission network should be provided to power the safety-related systems and all other auxiliary systems under normal, abnormal, and accident conditions. The offsite power source should be designed to minimize to the extent practical the likelihood of its failure under normal, abnormal, and accident conditions. Detailed reviews of the offsite ac power system and its interface with the onsite power system for ALWR design applications are covered in SRP Section 8.2, "Offsite Power System." 5. GDC 18 is satisfied as it relates to the testability of the onsite ac power system, and the following guidelines: A. RG 1.32 (see also IEEE Std. 308), as it relates to capability for testing of the onsite ac power system. B. RG 1.47, with respect to indicating the bypass or inoperable status of portions of the protection system, systems actuated or controlled by the protection system, and auxiliary or supporting systems that must be operable for the protection system and the system it actuates to perform their safety-related functions. C. RG 1.118 (see also IEEE Std. 338), as it relates to the capability for testing the onsite ac power system. D. RG 1.153 (see also IEEE Std 603), as it relates to the onsite ac power system. 8.3.1-12 Revision 4 - May 2010 6. The design requirements for an onsite ac power supply for systems covered by GDCs 33, 34, 35, 38, 41, and 44 are encompassed in