ML20009C003

Interim Deficiency Rept Re Defective micro-switch CMC-type Switches,Originally Reported on 801203.Defective Switches Have Been Replaced & Tests Are Continuing.Next Rept Will Be Submitted by 811103

ML20009C003
Person / Time
Site:	Fermi
Issue date:	07/07/1981
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, EF2-53561, EF2-53569, NUDOCS 8107200144
Download: ML20009C003 (2)

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/M Donald A. W.;lls ve o Me u xv Detroit 2000 Second Avenue Det oit, M,cn gan 48226 (313) 237-8000 July 7, 1981 EF2-53567

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Mr. James G. Keppler, Director

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JUL 171981 > 79 799 Roosevelt Road Glen Ellyn, Illinois 60137 u.s, taun ucusce C

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Subjcct: InterimReportof10CFR50.55(e)ItemonMicro-SwitcS,G 8

y,53 01C Type Switches (#34)

N near Mr. Keppler:

The final report on the Micro-Switch 01C Type switches problem carmot be subtitted tc you by July 7, 1981, as scheduled. This additional interim report is to provide you with the current status of the evaluation of this problem.

The item was originally reported to Mr. R. Knop of the NRC-Region III by Detroit Edison's Mr. H.A. Walker, Supervisor-Construction Quality Assur-ance, on December 3, 1980. At that time, a number of defective Micro-Switches, 01C Type, were noted on GE supplied panels in the Fermi 2 cont-rol roan equignent.

Six failures had been noted during the earlier part of testing the switches.

The reasons for these failures were crushed internal parts in the switches, inproperly assembled switches and other damaged parts. It was apparent that these switches were installed in this conditica. These defec+ive switches have been replaced, and the testJng is continuing.

Another report on this item, eitl er interim or final, is scheduled to ue sent to you on or before November 3,1981. If you have any questions concerning this matter, please contact Mr. H.A. Walker, Supervisor-Construction Quality Assurance.

Very truly yours,

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s-Mr. James G. Keppler, Director July 7, 1981 Page Two EF2-53567 cc

Mr. Victor Stallo, Jr., Director Office of Inspection and Enforcement Division of Reactor Inspection Programs U.S. Nuclear Regulatory Cm mission Washington, D.C. 20555 Mr. Bruce Little, Resident Inspector U.S. Nuclear Regulatory Cmmission Resident Inspectors Office 6450 North Dixie Highway Newport, Michigan 48166 m-i

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