Document: NRC Regulatory Guide
Document ID: 1731a882-b0c5-418d-b65e-55646c26be5c
Document Type: regulatory_guide
Title: 03/2007
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0703/ML070380553.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.9
CFR Part: 
CFR Title: 

Content:
ed perform their intended function. 2.3 Preoperational and Surveillance Testing Table 1 relates preoperational and surveillance tests to the anticipated schedule for performance (e.g., preoperational, monthly surveillance, 6-month testing, scheduled refueling period, and 10-year testing). A prelube period should precede all planned tests described in this regulatory guide. The tests should be in general accordance with the manufacturer’s recommendations for reducing engine wear, including cooldown operation at reduced power followed by postoperation lubrication. 2.3.1 Preoperational Testing A preoperational test program should be implemented for all emergency diesel generator systems following assembly and installation at the site. This program should include the tests identified in Table 1. In addition, through a minimum of 25 valid start and load demands without failure on each installed emergency diesel generator, this test should demonstrate that the new emergency diesel generator has attained a level of reliability acceptable for entering into an operational category. Rev. 4 of RG 1.9, Page 13 2.3.2 Surveillance Testing After plants are licensed (after fuel load), periodic surveillance testing of each emergency diesel generator should demonstrate the continued capability and reliability of the diesel generator unit to perform its intended function. When the emergency diesel generator is declared operational in accordance with the plant’s technical specifications, the following periodic test program should be implemented. 2.3.2.1 Monthly Testing After completion of the reliability demonstration during preoperational testing, the emergency diesel generators should be periodically tested during normal plant operation. Each diesel generator should be started as described in Regulatory Position 2.2.2 and loaded as described in Regulatory Position 2.2.3 at least once every 31 days (with the maximum allowable extension not to exceed 25 percent of the surveillance