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:
fore 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: 13.3.1. specific or API gravity, 13.3.2. water and sediment, 13.3.3. viscosity, and 13.3.4. flash point. Test results for these properties should be in accordance with the limits specified in the applicable specification. Analysis of the other properties listed in Table 1 of ASTM D975-11 should be completed within 31 days of new fuel delivery, in accordance with ASTM D975-11 or ANSI/ANS-59.51-1997 13.4. Accumulated condensate should be removed from supply tanks on a monthly basis. 13.5. Day tanks and integral tanks should be checked for water monthly, as a minimum, and after each operation of the diesel where the period of operation was 1 hour or longer. The presence of water should be verified in accordance with ASTM D2709-96, “Standard Test Method for Water and Sediment in Middle Distillate Fuels by Centrifuge” (Ref. 19), or ASTM D1796-97, “Standard Test Method for Water and Sediment in Fuel Oils by the Centrifuge Method (Laboratory Procedure)” (Ref. 20). The level should not exceed the maximum specified in Table 1 of ASTM D975-11. Accumulated water should be removed immediately. If water ingress is suspected from the suction piping of the day tank or integral tank, then the entire fuel oil system between the day tank or integral tank and the injectors should be flushed with fresh fuel oil. 13.6. As a minimum, the fuel oil stored in the supply tanks should be removed, the accumulated sediment removed, the tanks cleaned, and the interior inspected at 10-year intervals. Licensees should prevent the introduction of surfactants from soap and detergents into the system during cleaning. Licensees should also be aware that using strong oxidizing cleaning agents (e.g. high concentrations of sodium hypochlorite) could release noxious fumes or cause uncontrolled