05000461/LER-1999-001, Forwards LER 99-001-00 Re Improper Assembly of Motor That Caused Degradation of Bearings in Two Divisions of Shutdown Sws.Commitments Made by Util,Listed

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Forwards LER 99-001-00 Re Improper Assembly of Motor That Caused Degradation of Bearings in Two Divisions of Shutdown Sws.Commitments Made by Util,Listed
ML20207D536
Person / Time
Site: Clinton Constellation icon.png
Issue date: 03/01/1999
From: Mcelwain J
ILLINOIS POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20207D539 List:
References
U-603168, NUDOCS 9903100002
Download: ML20207D536 (2)


LER-2099-001, Forwards LER 99-001-00 Re Improper Assembly of Motor That Caused Degradation of Bearings in Two Divisions of Shutdown Sws.Commitments Made by Util,Listed
Event date:
Report date:
4612099001R00 - NRC Website

text

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I!!inois Power Company

<* *..

  • P.O. Box 678
  • '. Clinton.IL 61727
e :i Tel 217 935-8881 x3900  ;

Fax 217 935-4632 l

John P. McElwain Chief NuclearOfficer l R U-603168 2C.220 f

l

- An Ittinova Company -

March 1,1999 i Docket No. 50-461 10CFR50.73 j j

Dacemant Control Desk

- Nuclear Fagal**ery Commission ,

- Washington, D.C. 20555

Subject:

Clinton Power Station-Unit 1  :

Licaaaaa Event Report No. 1999-001-00 j u

DearMadam or Sir:

i Enclosed is Licensee Event Report (LER) No. 1999-001-0^ ?mroper Assembly of Motor Causes Dearadation ofBearins in Two Divisions of Shutdown -

)

Service Water System. This report is being submitted in accordance with the requirements of10CFR50.73.  !

/

The enclosed report contains the following commitment:

f i

e The procedures and vendor manuals associated with motors susceptible to shaft currents will be revised, as necessary, to ensure that the insulating requirements

. are identified (including recording as found and as left resistance levels), .N precautions me - y to avoid damaging insulation during maintenance are  ;

included, and instructions are provided on how to verify the integrity of insulation after completion of maintenance on the component.

  • - ' A training seminar that describes why and how components are insulated to protect against shaft currents, and the importance of maintaining their insulating properties will be developed and presented to maintenance personnel.

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9903100002 990301 PDR S ADOCK PDR 0500046 b[7 e

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U-603168 Page 2 i

e Prior to completion of the procedure and vendor manual updates, and the maintenance training seminar, a briefing on this issue will be given to maintenance planners.

Sincerely yours, l k John P. McElwam l' ChiefNuclear Officer i

MRS/krk l

I Enclosure cc: NRC Clinton Licensing Project Manager NRC Resident Office, V-690 Regional Administrator, Region III, USNRC Illinois Department ofNuclear Safety INPO Records Center l

l l

1 I'

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