ML20072H306

Ro:On 830219,reservoir Containing Lubricating Oil for Turbine 2 Leaked Into Lake Mi.Caused by Tube Failure.Tube Plugged

ML20072H306
Person / Time
Site:	Cook
Issue date:	03/17/1983
From:	Will Smith INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
R-830317, NUDOCS 8303290386
Download: ML20072H306 (3)

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~~,",,, INDIANA & MICHIGAN ELECTRIC COMPANY DONALD c. COOK NUCLEAR PLANT P.O. Box 458, Bridgman, Michigan 49106 (616) 465-5901 March 17, 1983 Mr. J. G. Keppler, Regional Mministrator United States Ibclear Regulatory Carnission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Operating License DPR-58, DPR-74 Docket tb. 50-315, 50-316

Dear Mr. Keppler:

Pursuant to the requirements of Appendix B, Part II lbn-Radiological, Environmental Protection Plan, Section 3.2, a copy of the report to the Michigan Water Resources Oxunission notifying than of a 'nirbine oil discharge to Lake Michigan is attached. 'Ihis report is required by Amendment tb. 54 to Facility Operating License Ib. DPR-58 and Amendncnt Ib. 40 to Facility Operating License Ib. DPR-74 dated May 6,1982.

Sincerely, LO W.G. h Smith,drD v

/chn cc: J.E. Dolan R.S. Hunter M.P. Alexich R.F. Kroeger B. Germano E. Swanson/N. thBry RO:III R.C. Callen, MPSC G. Charnoff, Esq.

J.M. Hennigan R.O. Bruggee, EPRI I10 0 PIERC J.F. Stietzel E.L. 'Ibwnley Dir., IE (30 copies)]

Dir., MIPC (3 copies)

MAR 24 ggg3 8303290386 830317 PDR ADOCK 05000315 S PDR

fh M U*~,LINDIANA & MICHIGAN ELECTRIC COMPANY oNE SUMMIT SoVARE P.o box 60. FORT WAYNE. IN. 46801 Te opnone (219) 425 2111

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March 7, 1983

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Mr. Fred Morely ^

Michigan Water Resources Commission ~

p.O. Box 30028 - Westland Office Lansing, Michigan 30028 Ref: Indiana & Michigan Electric Company Donald C. Cook Plant NPDES No. MI 0005827

Dear Mr. Morely:

This letter will confirm our telephone conversation of Monday, Feb. 28, 1983.

As reported to you by phone, it was discovered early Saturday morning, February 19, that the level had dropped in a 22,000 gallon reservoir which contains lubricating oil for the #2 turbine. The oil in this container is circulated to the bearings in the turbine and than through four coolers in series. Plant service water which picks up heat from y the coolers is discharged to Lake Michigan through the circulating L water discharge 002.

An investigation was started to ascertain where the lubricating had gone.

Finding no oil in the turbine room sump, a check of the coolers was start-i ed. Because the series coolers have no isolation or bypass valves, checks had to be made by isolating pairs of coolers. This procedure is somewhat difficult because the isolation valves are not 100 percent leak-tight.

On February 23, the north set of coolers were isolated to test for leaks P and an oil emulsion was detected from the vents and drains. Assuming the cooler to be in trouble, blanks were immediately installed in the piping to prevent any further discharge to Lake Michigan. Continued test-ing of the unit resulted in the discovery of a tube failure. The failed tube has been plugged and the unit returned to service.

On Saturday, February 19, 750 gallons of oil was required to bring the tank level back to normal. From that time until the leak was found five

! days later, only 75 gallons had escaped. We, thus, have concluded that l= the 750 gallons may have been lost through a very small leak over 55 days or so.

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Mr. Fred Morely March 7, 1983 No sheen or evidence of oil was found on the waters in front of the plant and by the very nature of the leak over a period of time,'no recovery was

? possible.

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.; Although some consumption of this oil is anticipated under normal operating conditions, a more careful inspection of oil level in the reservoir has been ordered for each shift.

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) 1 Very truly yours,

]

.. a Jack A. Druckemiller Manager of Environmental Affairs i

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