Document: NUREG-0800
Document ID: 72cf12c3-a823-4385-bbf4-92e2b543a906
Document Type: srp
Title: AC POWER SYSTEMS (ONSITE)
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:
ion-feeder breakers. 4. Standby Power Supplies 5 Design information and analyses demonstrating the suitability of the diesel generators as standby power supplies are reviewed to ensure that the diesel generators have sufficient capacity, and capability, and reliability to perform 6 their intended function. This will include an examination of the characteristics of each load and the length of time each load is required, the combined load demand connected to each diesel generator during the "worst" operating condition, automatic and manual loading and unloading of each diesel generator, voltage and frequency recovery characteristics of the diesel generators, continuous and short-term ratings for the diesel generators, acceptance criteria with regard to the number of successful diesel generator tests and allowable failures to demonstrate acceptability, and starting and load shedding circuits. In addition, where the 8.3.1-3 DRAFT Rev. 3 - April 1996 proposed design provides for the connection of nonsafety loads to the diesel generators or sharing of diesel generators between nuclear units at the same site, particular review emphasis is given to the possibility of marginal capacity and degradation of reliability that may result from such design provisions. 5. Identification The means proposed for identifying the ac onsite power system components including cables, raceways, and terminal equipment as safety-related equipment in the plant are reviewed. Also, the identification scheme used to distinguish between redundant cables, raceways, and terminal equipment of the power system is reviewed. 6. Vital SupportingAuxiliary Supporting Systems/Features7 The instrumentation, control circuits, and power connections of vital supportingauxiliary supporting systems and features are reviewed to determine 8 that they are designed to the same criteria as those for the safety-related loads and power systems that they support. This will include an examination of the vital