Document: NRC Regulatory Guide
Document ID: e7cef6d0-2869-4d77-9a08-126120ae6043
Document Type: regulatory_guide
Title: Fuel Oil Systems for Emergency Power Supplies + HISTORY – HISTORY 06/2012 – DG-1282 , Proposed Revision 2 Prior to the issuance of DG-1282, RG 1.137 was entitled "Fuel –Oil Systems for Standby Diesel Generators (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1210/ML121090447.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.137
CFR Part: 
CFR Title: 

Content:
lude sufficient instrumentation and alarms, both in the main plant control room and at each diesel generator or gas turbine generator local control panel, to permit operators to adequately monitor the fuel oil supply and the performance of the fuel oil system to ensure that the fuel oil system can continue to perform the required safety function during a design basis event. 12. When conducting maintenance on fuel oil supply systems, licensees should ensure practices are consistent with manufacturer recommendations including the use of specialized tools and techniques. 13. ANSI/ANS-59.51-1997, Appendix C, and ASTM D975-11, including Table 1, should be used as a basis for a program to ensure the initial and continuing quality of fuel oil as supplemented by the following: 13.1. The reference in ANSI/ANS-59.51-1997 to ANSI/ASTM D2276-94 for periodic manual sampling of the stored fuel should be changed to ASTM D4057-06 (Reapproved in DG-1282, Page 7 2011), “Practice for Manual Sampling of Petroleum and Petroleum Products” (Ref. 17). This test method should also be used to collect fuel oil test samples of new fuel for analysis prior to adding the oil to the supply tanks. 13.2. Appendix C to ANSI/ANS-59.51-1997 specifies that prior to the addition of fuel oil to the supply tank, the API gravity or specific gravity should be measured and should be within the ranges specified. The test for API or specific gravity should be performed in accordance with ASTM D1298-99 (Reapproved in 2005), “Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method” (Ref. 18). The acceptable range for these parameters should be in accordance with Appendix C of ANSI/ANS-59.51-1997. 13.3. Before adding new fuel oil to the supply tanks, onsite samples of the new fuel oil should be taken. As a minimum, before the addition of new fuel, tests for the following properties should be conducted: