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:
4.2.1)* (Surveillance) System operation tests: shutdown/ refueling (7.4.2.2)* Independence tests 10 years (7.4.2.3)* Monthly 6 Month 7.2.1.1 Starting X X 7.2.1.2 Load acceptance X X 7.2.1.3 Rated Load X X 7.2.1.4 Load Rejection X 7.2.1.5 Electrical X 7.2.1.6 Subsystem X 7.3.3 Reliability X 7.5.1 Start X X 7.5.2 Load Run X X 7.5.3 Fast Start X X X 7.5.4 LOOP X X 7.5.5 SIAS X 7.5.6 Combined SIAS and LOOP X X 7.5.7 Largest load rejection X X 7.5.8 Design load rejection X X 7.5.9 Endurance and load margin Xa X 7.5.10 Hot restart X X 7.5.11 Synchronizing X X 7.5.12 Protective trip bypass X X 7.5.13 Test mode override X X 7.5.14 Independence X X a Use 2 h and 22 h * IEEE Std 387-1995 Rev. 4 of RG 1.9, Page 11 2.2.3 Load Run (Load Acceptance) Test Clause 7.5.2 of IEEE Std 387-1995 should be supplemented as follows: This test involves demonstrating 90–100 percent of the continuous rating of the emergency diesel generator, for an interval of not less than 1 hour and until attainment of temperature equilibrium. This test may be accomplished by synchronizing the generator with offsite power. The loading and unloading of an emergency diesel generator during this test should be gradual and based on a prescribed schedule that is selected to minimize stress and wear on the diesel generator. 2.2.4 Rated Load Test Clause 7.2.1.3 (a) of IEEE Std 387-1995 should be supplemented as follows: If the design-basis event loads are higher than the continuous rating of the emergency diesel generator, the test should be conducted at the worst case design-basis event loads. 2.2.5 LOOP Test Clause 7.5.4 of IEEE Std 387-1995 should be supplemented as follows: This test involves simulating a LOOP to demonstrate that (1) the emergency buses are deenergized and the loads are shed from the emergency buses, and (2) the emergency diesel generator starts on the autostart signal from its standby conditions; attains the required voltage and frequency, and energizes permanently connected loads within