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:
e 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 chemical reactions and use the appropriate precautions if using these chemicals. Other materials with cleaning properties equivalent to high concentrations of sodium hypochlorite can be used to clean fuel oil supply tanks. NRC Information Notice IN 2002-07, “Use of Sodium Hypochlorite for Cleaning Diesel Fuel Oil Supply Tanks” (Ref. 21), discusses the potential problems related to the use of sodium hypochlorite solutions for cleaning diesel fuel oil supply tanks. DG-1282, Page 8 13.7. Licensees should add fuel oil carefully to the supply tank to avoid suspension of settled particles. This prevents tainting the fuel supply with suspended material. 13.8. Efforts to monitor on-hand fuel supply must be diligent to ensure reliability and availability of the fuel oil system. These include the aforementioned ASTM test procedures and biological cultures (for fungus and bacteria). Recirculation (continuous) treatment systems can improve existing fuel quality, extend fuel life, and refresh stockpiles. Such systems have the potential to remove water, remove solids (down to 2 micrometers), and discourage bacterial growth. These systems can provide the following benefits: 13.8.1. A representative sample of the treated fuel satisfies the licensee technical specification in relation to fuel quality and overall system availability. 13.8.2. The system conforms to the requirements in ANSI/ANS 59.51-1997. 13.9. NUREG-1801, “Generic Aging Lessons Learned (GALL) Report” (Ref. 22), Section XI.M30, “Fuel Oil Chemistry,” describes a program focused on managing loss of material due to general, pitting, crevice and microbiologically-influenced corrosion (MIC) and fouling that leads to corrosion of the fuel tank internal surfaces. 13.10. The NRC does not regulate emissions from