Document: NUREG-0800
Document ID: 81256f55-72dd-4777-9472-f373c71c4554
Document Type: srp
Title: AC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550065.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
the capability for testing the onsite ac power system. D. Regulatory Guide 1.153 (see also IEEE Std 603), as it relates to the onsite ac power system. 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 GDC 17. 8.3.1-12 Revision 3 - March 2007 7. GDC 50 is satisfied as it relates to the design of containment electrical penetrations containing circuits of the ac power system, and the guidelines of Regulatory Guide 1.63 are followed (see also IEEE Stds 242, 317, and 741), as related to the capability of electric penetration assemblies in containment structures to withstand a LOCA without loss of mechanical integrity and the external circuit protection for such penetrations, as well as to ensure that electrical penetrations will withstand the full range of fault current (minimum to maximum) available at the penetration. 8. 10 CFR 50.63, as it relates to use of the redundancy and reliability of diesel generator units as a factor in limiting the potential for station blackout events. Acceptance is based on meeting the following specific guidelines: A. Regulatory Guide 1.9, as it relates to the adequacy of the diesel generator surveillance criteria provided to attain and maintain the target reliability levels of diesel generator units. B. Regulatory Guide 1.155, as it relates to use of the reliability of emergency onsite ac power sources as a factor in determining the coping duration for station blackout and the establishment of a reliability program for attaining and maintaining source target reliability levels. Determination of station blackout coping time is reviewed in detail in SRP Section 8.4. Except for passive reactor designs described in the acceptance criteria of SRP 8.3.1 subsection II.4.J above, new applications should provide an adequate AAC source of diverse design (with respect to onsite ac emergency sources) that is consistent with the guidance in Regulatory Guide 1.155 and