ML20084J592

Ro:On 720518,during Phase III Startup Tests,Hpci Sys Turbine Turning Gear Motor Failed.Caused by Overloaded & Burned Out Winding Field Circuit.Turning Gear Motor Sent to GE & Rewound

ML20084J592
Person / Time
Site:	Quad Cities
Issue date:	05/24/1972
From:	Palmer F COMMONWEALTH EDISON CO.
To:	Block E US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084J594	List: ML20084J592 ML20084J602
References
FAP-72-101, NUDOCS 8305180327
Download: ML20084J592 (2)

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Commonwealth Edison Company QU A D CITIE S NUCLEAR POWER ST A TIO N

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POST OFFICE BOX 216

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May 24, 1972 .

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Mr. E. J. Block Acting Director, Directorate of Licensing kx ~ ? '#

'IA U. S. Atomic Enerry Commission Washington, D. C. 20545 [. < ,/

Dear Mr. Block:

Ref: Quad-Cities Nuclear Power Station Unit 2 DPR 30 . Appendix A Se ction 1. A. 2 and 6. 6.B . 3 The purpose of this letter is to inform you of the High Pressure Coolant Injection System turbine turning gear motor failure on Unit 2 at Quad-Cities Nuclear Power Station May 18, 1972 at 1: 15 p . m.

Description of Failure ,

During startup tes ts (Phase III) on Unit 2 at Quad-Cities Nuclear Power Station with the reactor at 350 psig the turning gear motor failed on the high pressure coolant in-jection system. The high pressure coolant injection system was declared inoperable at 1: 15 p . m. on May 18, 1972 and the reactor was shut down immediately. Inspection of the turning gear motor indicated burned windings.

Cause of Failure The turning gear motor has a two winding field circuit; so that the motor can be utilized for either 125 or 250 volt gj3[ direct current service. A wiring error was made which connected the field for 125 volt service on a 250 volt a('M curcuit. The winding was overloaded and burned out. The

.fK motor performed properly during testing for short periods because the ampere turns of field strength was adequate.

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G305180327 720524 P gDRADOCK 05000265 PDR rra (4n %*

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) Q,l Mr. E. J. Block May 24, 1972 s

Corrective Action -  ;

I The turninst gear motor was sent to the General Electric j Service Shop in Bettendorf, Iowa and rewound. The motor was tested and returned to service on the Unit 2 high pressure coolant injection system on t'ay 22, 1972.

Very truly yours ,

C0f1t?ON'dE ALTil EDISO.'l C0"P A!!Y Quad-Cities iluclear Power Station 7 f '

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F. A. Palmer Superintendent FAP/zm d

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