ML20249B869

PNO-76-181:during Conduct of Routine Monthly Diesel Generator Surveillance Test on 761104,fuel Oil Leak Developed Due to Cracked Fitting in Fuel Line.Fuel Oil Sprayed on Exhaust Manifold & Fire Ignited.Inspector Onsite

ML20249B869
Person / Time
Site:	Duane Arnold
Issue date:	11/04/1976
From:	Gower G, Roy G, Thompson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-76-181, NUDOCS 9806240350
Download: ML20249B869 (1)

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hk[hGMLOpj PRELIMINARY NOTIFICATION .pf - -

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/ . November 4, 1976 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-76-181 This preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that ic known by IE staff on this date.

Facility: Iowa Electric Light and Power Company, Duane Arnold Energy Center (DN 50-331), Palo, Iowa Cubject: SMALL DIESEL GENERATOR FIRE During the conduct of a routine monthly diesel generator surveillance test on November 4,1976, a fuel oil leak developed due to a cracked fitting in the fuel line. As a result, fuel oil was sprayed on the hot exhaust manifold and ignited. The engine was immediately shut down and the fire extinguished by the test operator stationed at the engine.

Outside assistance to extinguish the fire was not necessary, and there was no apparent damage to the engine. The fuel line crack is suspected to have been caused by vibration fatigue.

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The fittings were checked on the second diesel generator and no evidence of cracking was detected. Since the second diesel generator unit test- J ed satisfactorily, reactor operations are continuing. l An IE:III inspector was onsite at the time of the incident.

No press release is planned by the licensee or Region III (Glen Ellyn) . ,

1 This PN is being issued in consideration of the high visibility which is associated with reactor plant related fires.

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.. Region III received notification of this occurrence by telpphone from the onsite inspector at 12:20 p.m. EST on November 4,1976.

Contact:

GCGover, IE x27261 GWRoy, IE x27261 DThompson, IE x27541 l Distribution:

Chairman Rowden Commissioner Mason S. J. Chilk, SECY Commissioner Gilinsky C. C. Kammerer, CA G. F. Murphy, JCAE Commissioner Kennedy

. l L. V. Gossick, EDO E. Volgenau, OIE J. A. Harris, PA B. C. Rusche, NRR H. K. Shapar, ELD T. J. McTiernan, AIA K. R. Chapman, NMSS R. G. Ryan, OSP j Transmitted: PBldg H St  ; MNBB .  ; Luge  ;

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PRELIMINARY NOTIFICATION

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DF ca " 3 9806240MO 761104 PDR I&E PNO-76-104 PDR .

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