Document: NUREG-0800
Document ID: 9cfc38bf-7808-446e-a43d-4ca9ff55df2a
Document Type: srp
Title: AC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740289.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
ates to criteria for electrical portions of safety-related systems. G. RG 1.155, as it relates to the use of onsite emergency ac power sources for SBO. H. RG 1.204 (see also IEEE Stds. 665, 666, 1050, and C62.23), as it relates to the lightning and surge protection for the onsite ac power system. I. NUREG/CR-0660 is incorporated as it relates to the following recommendations: I. The diesel generator sets should be capable of operation at less than full load for extended periods of time without degradation of performance or reliability. With offsite power available, no-load operation of the diesel generators will occur following a safety injection signal. Extended no-load operation of this equipment should be minimized. Operating procedures should be provided that limit extended no-load operation of the diesel generators. The procedures should include loading the diesel engine to a minimum of 25% of full load for 1 hour after 8 hours of continuous no-load operation or to a load as recommended by the engine manufacturer. ii. A complete formal training program should be provided for all personnel who will be responsible for the maintenance and availability of the diesel generators. The depth and quality of training shall be at least equivalent to that provided by major diesel engine manufacturers' training programs. iii. A preventive maintenance program should be provided which encompasses investigative testing of components which have a history of repeated malfunctioning and a plan for the replacement of those components that require constant attention and repair with other products of proven reliability. iv. Repair and maintenance procedures should provide for a final equipment check prior to an actual start-run-load test to ensure that all electrical circuits are functional (i.e., fuses in place, no loose wires, test leads removed, etc.) and all valves are in the proper position. The test procedure(s) should explicitly state that upon satisfactory test completion