ML19309H123

Final Deficiency Rept Per 10CFR21,re Svc Water Booster Pump Motor Failure.Motors Were Taken Out of Svc & Sent to Factory for Repair

ML19309H123
Person / Time
Site:	Summer
Issue date:	04/11/1980
From:	Wactor J SOUTH CAROLINA ELECTRIC & GAS CO.
To:
Shared Package
ML19309H121	List: ML19309H120 ML19309H123
References
NUDOCS 8005080465
Download: ML19309H123 (2)

Text

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sC 5.-

8005080 S 6

, 10CFR21 -

SUBSTANTIAL SAFETY HAZARD

1. Name and Address of Reporting Individual ,

James A. Wactor SCE&G Co., P. O. Box 764

Columbia, S. C. 29218

2. Identification of Basic component Service Water Booster Pump Motors 6

3. Identification of Firm Supplying Component Louis .'.llis, Inc.

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4. Nature of Defect, Substantial Safety Hazard Cr'ented, and Evaluation j The service water booster pump A motor shorted and tripped the breaker when it was bumped to check rotation. The motor was disassembled, and it was found that the spacer bars between lamination on the rotor were not welded and were misaligned I

such that the bars were hitting the stator. Copper shavings were also found in the  !

I windings. The factory was consulted, and said that the bars should be welded in place. The B pump motor sae also disassembled and the same conditions were observed.

Other Louis Allis motors in the plant were inspected, but they were not of the same construction and did not have this problem. The service water booster pumps supply cooling water for the reactor building cooling units in the event of a safey injection.

A loss of these pumps could result in high temperature and pressure in the reactor building with possible damage to instrumentation and other equipment in the reactor building and containment leakage.

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March 31, 1980 t 5. Date Information of Defect Was-Obtained -

6. Number and Location of Defect There are two service water booster pump motors at V. C. Summer Nuclear Station.

Other Louis Allis motors at Summer Station are a dif ferent design ,and do not have this' problem.

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7. C_orrective Action e The motors were taken out of service and returned to the factory for repair.

Inspections will be made before return to insure that the problem has been corrected.

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8. Advire to Purchasers or Licensees

- Since this problem could exist for some time before causing a problem, it is suggest.d that end bells be removed and the spacer bars checked to see that they

, are welded. -

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April 11, 1980 ee , . . .+ ...w,, , ,,..,%,.. ., ,,, ,. .. . . . . . . . . _ , ,

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