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    Fuel Quality Program for Long-Term Storage of Gas Turbine Distillate Fuel in Large Tanks

    Published: 01 January 1988

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    In 1981 advanced microbial activity was discovered in several large gas turbine fuel storage tanks. Additional testing revealed that the fuel had formed insoluble material and exhibited unstable characteristics when heated. Analysis of fuel from more tanks in the Florida Power & Light system showed similar results. After several floating fuel feed lines sank to the tank bottom at the Fort Myers Plant, a program based on Diesel Fuel Stabilizer Additive (MIL-S-53021) was established. Because of the low fuel turnover and the large volume of fuel involved, tank entry was not possible for several years. A program of continuing analysis showed several phenomena. Bottom activity appeared to increase after initial biocide treatment with subsequent activity counts reduced slowly to zero. After tank entry was made, large amounts of dead debris were discovered both on the tank bottom and as high as 30 ft (9 m) on the tank walls. This paper will cover the problems, the solutions, and the on-going program to prevent a future occurrence.


    microbial contamination, fuel stability, biocidal treatment, long-term storage, stability treatment, fuel treatment program, fuel quality program

    Author Information:

    Pickering, TH
    Results supervisor, Florida Power & Light Company, Fort Myers Plant, Fort Myers, FL

    Committee/Subcommittee: D02.E0

    DOI: 10.1520/STP10051S