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
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CFR Title: 

Content:
s with up to 5% biodiesel not to be a biodiesel grade. Therefore, licensees should not assume that purchased diesel fuel is free of any biodiesel without verification by the supplier before adding new fuel oil to the supply tanks. An oxidation stability issue is known to affect biodiesel fuel during long term storage. This configuration would apply to nuclear power plants where the diesel fuel (that may contain a blend of biodiesel) is stored for long periods of time. NRC Information Notice, IN 2009-02, “Biodiesel in Fuel Oil Could Adversely Impact Diesel Engine Performance” (Ref. 24), indentifies several potential problems associated with a 5% biodiesel (B5) and suggests DG-1282, Page 9 actions to mitigate the problems. Electric Power Research Institute (EPRI) reports, “Plant Support Engineering: Storage and Use of Low-Concentration (5%) Biodiesel Blends in Nuclear Plant Emergency Diesel Generators,” dated December 2010 (Ref. 25), and “Plant Engineering: Storage and Use of Low-Concentration (5%) Biodiesel Blends in Nuclear Plant Emergency Diesel Generators, Addendum: Fuel Storage Test and Contingency Plan,” dated March 2011 (Ref. 26), provide information on the use of B5 fuel for emergency diesel generators. D. IMPLEMENTATION The purpose of this section is to provide information on how applicants and licensees1 may use this guide and information regarding the NRC’s plans for using this regulatory guide. In addition, it describes how the NRC staff complies with the Backfit Rule (10 CFR 50.109) and any applicable finality provisions in 10 CFR Part 52. Use by Applicants and Licensees Applicants and licensees may voluntarily2 use the guidance in this document to demonstrate compliance with the underlying NRC regulations. Methods or solutions that differ from those described in this regulatory guide may be deemed acceptable if they provide sufficient basis and information for the NRC staff to verify that the proposed alternative demonstrates compliance