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:
Section C.I.8.3.1. Regulatory Guide 1.206, Section C.III.1, Chapter 8, provides similar guidance for COL applications that are based on certified ALWR designs. To ensure that each diesel generator is capable of starting and accelerating to rated speed all the connected loads in the necessary sequence and within the minimum time intervals established by the accident analyses, the reviewer examines for each diesel generator the loading profile curves, voltage and frequency recovering characteristic curves, and the response time of the excitation system to load variations. This examination should verify that the capability of each diesel generator to respond to voltage and frequency variations satisfies Position C.1.4 of Regulatory Guide 1.9. In addition, the adequacy of the circuit design for starting and disconnecting and connecting safety loads from and to each diesel generator is checked. This includes a review of the starting initiating circuits; manual and automatic sequential loading and unloading circuits; interrupting capacity of switchgear, load centers, control centers, and distribution panels; grounding criteria; and electrical protective relaying circuits, including their coordination, relay settings, and assigned control power supplies for each load and each diesel generator. In reviewing the criteria governing the design of the thermal overload protection for motors of motor-operated safety-related valves, the reviewer is guided by Regulatory Guide 1.106. Motor starting studies, load flow studies, demand load (bus loading) studies, and short circuit studies should be reviewed in accordance with the guidance provided in industry standards (References 47, 48, and 56) and, for COL applications that are not based on certified ALWR designs, Regulatory Guide 1.206, Section C.I.8.3.1. Regulatory Guide 1.206, Section C.III.1, Chapter 8, provides similar guidance for COL applications that are based on certified ALWR designs. Regarding the review of the