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:
tance criteria stated in 58 subsection II are satisfied, the review of the proposed design is performed as described below. The primary reviewer will coordinate this review with the other branch areas of review as stated in subsection I. The primary reviewer obtains and uses such input as required to assure ensure that this review procedure is complete. 1. To assure verify that the requirements of General Design Criterion GDC 17 are satisfied, the following review steps should be taken (as applicable for a CP or OL review) : 59 (a) The electrical drawings should be examined to assure ensure that at least two separate circuits from the transmission network to the onsite power distribution system buses are provided (a single switchyard may be common to these paths). DRAFT Rev. 4 - April 1996 8.2-10 For new applications, the design should include 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. See SRP Section 8.3.1 for further details.60 For new applications, the electrical drawings should also be examined to ensure that the design includes an alternate power source to nonsafety loads, unless it is 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. See SRP Section 8.3.1 for further details.61 (b) The routing of transmission lines should be examined on the station layout drawings and verified during the site visit to assure ensure that at least two independent circuits from the offsite grid to the onsite distribution buses are 62 physically separate and independent. No other lines should cross above these two circuits. Attention should be directed towards assuring ensuring that no single event such