ML17329A031

Informs That on 910505,discovered Small Leak in Main Turbine Lubricating Oil Coolers.Leaking Cooler Isolated Preventing Loss of Oil to Nonessential Svc Water.Exact Amount of Oil Lost Unknown & Estimated 860 Gallons Observed in Tank Level

ML17329A031
Person / Time
Site:	Cook
Issue date:	05/14/1991
From:	Baker D INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	Kilmer G MICHIGAN, STATE OF
References
NUDOCS 9105310091
Download: ML17329A031 (5)

Text

ACCELERATED DI TRJBUTION DEMONS TION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9105310091 DOC.DATE: 91/05/14 NOTARIZED: NO DOCKET FACIL:50-316 Donald C.

Cook Nuclear Power Plant, Unit 2, Indiana 6

05000316 AUTH.NAME AUTHOR AFFILIATION BAKER, D. L.

Indiana Michigan Power Co.

(formerly Indiana

& Michigan Ele RECIP.NAME RECIPIENT AFFILIATION KILMER,G.

Michigan, State of

SUBJECT:

Informs that on 910505,discovered small leak in main turbine lubricating oil coolers. Leaking cooler isolated preventing loss of oil to nonessential svc water. Exact amount of oil lost unknown, estimated 860 gallons observed in tank level.

DISTRIBUTION CODE:

IE23D COPIES RECEIVED:LTR J ENCL g SIZE:

TITLE: Environmental Event Report (per Tech Specs)

NOTES D

RECIPIENT ID CODE/NAME PD3-1 LA COLBURN,T.

INTERNAL: NRR/DREP/PEPB9D OGC/HDS2 RGN3 EXTERNAL: NRC PDR COPIES LTTR ENCL RECIPIENT ID CODE/NAME PD3-1 PD NRR PMAS ILRB12 LE 01 RGN2/DRSS/EPRPB NSIC COPIES LTTR ENCL D

D NOTE TO ALL"RIDS" RECIPIENTS:

D D

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAMEFROM DISTRIBUTION LISIS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED:

LTTR 13 ENCL

II

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~

1 04 0

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Indiana Michigan power Company A One Summit Squar~~

P.O. Box 60 Fort Wayne, IN 46801 219 425 2111 g

INQlhltM NlCHlGAN POWM Mr. Galen Kilmer District Environmental

Response

Supervisor Michigan Department of Natural Resources P. 0.

Box 355'.

Plainwell, Michigan 29080 May 14, 1991

Dear Mr. Kilmer:

On May 5,

1991, at 2334 hours0.027 days <br />0.648 hours <br />0.00386 weeks <br />8.88087e-4 months <br />

EDT, personnel at the Indiana Michigan Power Company (IGM)

Cook Nuclear Plant discovered a small leak in one of Unit 2's main turbine lubricating oil coolers.

Lake water from the Nonessential Service Water (NESW)

System is pumped through cooler tubes to cool the lube oil.

This small hole created a

connection between the cooler and the NESW System, which discharges to Lake Michigan.

The leaking cooler was isolated on May 5,

1991, thereby preventing any more loss of oil to the NESW System.

The exact amount of oil lost is not

known, but is estimated to be 860

gallons, based on the observed drop in lube oil tank level.

Because the leak is believed to have occurred over a

ten day time period, and because the NESW System is discharged into the 920,000 gpm Circulating Water

System, no oil was ever detected in the discharge.

A physical inspection of the shoreline and near-shore waters on May 6

revealed no oil present.

The incident was reported to the National

Response

Center, Report No. 70917, and the Michigan PEAS on May 6, 1991.

In order to prevent future occurrences, a preventive maintenance program for the four Unit 2

main turbine lube oil coolers will be implemented.

If there are any further questions, please contact Dave Shipe, Environmental Engineer, at (219) 425-2123.

Very truly yours, Donald L. Baker Environmental Affairs Director DLB/sdb/004 910531009'1 91051~)

PDR ADOCK 05000316 S

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May 14, 1991 Mr. Galen Kilmer Page 2

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Shaw, Trowbridge A. B. Davis NRC Region III Wr. T. E; Murley Nuclear Reactor NRC Document Control