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:
General Design Criterion 17 (GDC 17) as it relates to the preferred power system's (i) 46 capacity and capability to permit functioning of structures, systems, and components important to safety; (ii) provisions to minimize the probability of losing electric power from any of the remaining supplies as a result of, or coincident with, the loss of power generated by the nuclear power unit or loss of power from the onsite electric power supplies; (iii) physical independence; (iv) availability and the guidelines of Regulatory DRAFT Rev. 4 - April 1996 8.2-6 Guide 1.32 (see also IEEE Std 308-1974 ) as related to the availability and number of 47 immediate access circuits from the transmission network; and (v) capability to meet the guidelines of Appendix A to SRP Section 8.2 as related to acceptability of generator circuit breakers and generator load break switches. For new applications, the design should provide at least one offsite circuit to each redundant safety division that is supplied directly from an offsite power source with no intervening nonsafety buses, thereby permitting the offsite source to supply power for safety buses in the event the nonsafety bus(es) fail. The design should also include an alternate power source to nonsafety loads, unless it can be demonstrated that existing design margins will result in transients for loss of nonsafety power events that are no more severe than those associated with the turbine-trip-only event specified in plant designs. These issues are reviewed in detail in SRP Section 8.3.1.48 3. General Design Criterion 18 (GDC 18) as it relates to the offsite power system. 49 4. The design requirements for an offsite power supply for systems covered by General Design Criteria 33, 34, 35, 38, 41, and 44 are encompassed in General Design Criterion GDC 17. 5. 10 CFR 50.63 as it relates to an AAC power source (as defined in 10 CFR 50.2) provided for safe shutdown (non-DBA) in the event of a station blackout, and the guidelines of