Document: NUREG-0800
Document ID: d9e9d0a9-6390-4154-94dc-7d5e6d8145cd
Document Type: srp
Title: A-C POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350489.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
ll occur following a safety injection signal. Etended no load operation of this equipment shall be minimized. Operating procedures shall be provided that limit extended no load operation of the diesel generators. The procedures shall require loading the diesel engine to a minimum of 25% of full load for one hour after eight hours of continuous no load operation or to a load as recommended by the engine manufacturer. (2) A complete formal training program shall 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. (3) A preventive maintenance program shall be provided which encompasses investigative testing of components which have a history of repeated malfunctioning and a plan for the replacement of those components which require constant attention and repair with other products of proven reliability. (4) Repair and maintenance procedures shall provide for a final equipment check prior to an actual start-run-load 8.3.1-6 Rev. 2 - July 1981 test to assure 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) shall explicitly state that upon satisfactory test completion the diesel generator unit shall be returned to a ready automatic standby service under the control of the control room operator. (5) Except for sensors and other equipment that must be directly mounted on.the engine or associated piping, the controls and monitoring instruments shall be installed on a free standing floor mounted panel located on a vibration free floor area. NOTE: If the floor is not vibration free the panel shall be equipped with vibration mounts. 5. General Design Criterion 18, as related to the testability of the onsite a-c power system, and the guidelines of Regulatory