05000315/LER-1979-037, Forwards LER 79-037/03L-0 & Revised LER 79-034/03L-0, Changing Rept Number to 79-036/03L-0

Forwards LER 79-037/03L-0 & Revised LER 79-034/03L-0, Changing Rept Number to 79-036/03L-0

ML17317B431
Person / Time
Site:	Cook
Issue date:	08/08/1979
From:	Shaller D INDIANA MICHIGAN POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B432	List: 05000315/LER-1979-036-03, /03L-0 on 790709:two Ice Condenser Intermediate Deck Doors Found Frozen Shut.Cause Not Determined.Ice Chipped Off & Doors Returned to Operable Status 05000315/LER-1979-037, Forwards LER 79-037/03L-0 & Revised LER 79-034/03L-0, Changing Rept Number to 79-036/03L-0 05000315/LER-1979-037-03, /03L-0 on 790709:position of Certain Control Bank C Rods Exceeded 12-step Limit Imposed by Tech Specs. Caused by Drifting of Rod Signal Conditioning Module
References
NUDOCS 7908140650
Download: ML17317B431 (5)

LER-1979-037, Forwards LER 79-037/03L-0 & Revised LER 79-034/03L-0, Changing Rept Number to 79-036/03L-0

Event date:
Report date:
3151979037R00 - NRC Website

text

~erlcen yste ee c SUKL00$JblleldfZ DONALD C. COOK NUCLEAR PLANT P.O. Box 458, Bridgman, Michigan 49106 August 8, 1979 Mr. J.G. Keppler, Regional Director Office of Inspection and Enforcement United States Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Operating License DPR-58 Docket No. 50-315

Dear Mr. Keppler:

Pursuant to the requirements of the Appendix A Technical Specifications the following report/s are submitted:

RO 79-037/03L-O.

In addition to the above report, please find attached a revised copy of RO 79-034/03L-0 which was inadvertently given the same number as a pre-viously submitted report.

This report should be number as RO 79-036/03L-0 and is reflected in the attached revised LER.

Sincerely, D.V. Shaller Plant Manager

/bab cc:

J.E.

Dolan R.W. Jurgensen R.F. Kroeger R. Kilburn R.J. Vollen BPI R.E.

Masse RO:III R.C. Callen MPSC P.W. Steketee, Esq.

R. Walsh, Esq.

G-Charnoff, Esq.

G. Olson J.M. Hennigan PNSP.C J.F. Stietzel Dir., IE (30 copies)

Dir., MIPC (3 copies)

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION CENSEE EVENT REPORT CONTROL BLOCK:

Q (PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

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9 Qs 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES

~10 WHILE I N MODE TWO CONDUCTING CONTROLMOD WORTH TESTI'NG IT WAS DISCOVERED THAT THE INDICATED POSITION OF CONTROL BANK C RODS C-3,C-13, N-13, N-3 AND H-6 EXCEEDED

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SECONDARY COIL VOLTAGE MEASUREMENTS.

THE EVENT CAUSE WAS TRACED TO EACH RESPECTIVE 7

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ACTUAL ROD POSITION TWAS DETERMINED T L

RODS SIGNAL CONDITIONI'NG MODULE WHICH HAD DRIFTED.

FOLLOWING ADJUSTMENT ALL INDICATORS FUNCTIONED PROPERLY.

AN ENGINEERING REVIEW IS IN PROGRESS TO DETERMINE THE

CAUSE

OF THIS RECURRI'NG PROBLEM.

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68 69 616-465-5901

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 DURING A PLANT TOUR TWO ICE CONDENSER INTERMEDIA K

80Q TO BE FROZEN SHUT.

THIS CONSTITUTES AN INOPERABLE INTERMEDIATE DECK 4

DOOR DELINEATED IN TECH; SPEC. 3.6.5.3.

THE ICE WAS CHIPPED OFF AND THE 6

DOORS WERE RETURNED TO AN OPERABLE STATUS..

PUBLIC HEALTH AND SAFETY

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WERE NOT JEOPARDIZED.

NO PREVIOUS EVENTS OF THIS NATURE ARE KNOWN.

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