ML19210B221

Ro:On 740329,nuclear Svc River Water Pump Failed During Hot Functional Test Sequence.Caused by Pump Shaft Fracture in Pump Motor Shaft Coupling Area.Motor & Pump Returned to Respective Vendors for Insp & Repair

ML19210B221
Person / Time
Site:	Three Mile Island
Issue date:	03/29/1974
From:	John Miller METROPOLITAN EDISON CO.
To:
Shared Package
ML19210B216	List: ML19210B221
References
NUDOCS 7911040149
Download: ML19210B221 (1)

Text

I,

/ <

I c81' fr igJ  !

/ c .. ,v. -

,f '::::,,. na ru amaan

/

I METROPOLITAN EDISON COMPANY .: ciar or an:sm ruauc ununa comnac:: ,/

13T OFFICE BOX 542 RE ADING. PENNSYLVANI A 19603 , TELEPHONE 215 - 929-36o1 Dr. D.F. Knuth, Director Directorate of Regulatory Operations United States Atomic Energy Commission Washington, D.C. 20545

Subject:

Three Mile Island Nuclear Station Unit I Docket No. 50-289 Nuclear Service River Water (NSRW) Pump Failure

Dear Dr. Knuth:

You were notified on March 4, 1974, of a situation which may be consid-ered reportable under 10CFR50.55(e), " Conditions of Construction". This situation related to the failure of NSRW Pump "A".

DESCRIPTION OF INCIDENT During the Hot Functional Test Sequence, the subject pump experienced a mechanical failure. This failure consisted of pump shaft fracture in the pump-motor shaft coupling area. An alternate pump was activated and the Hot Functional Test Sequence resumed without further operating difficul-ties or apparent da= ages.

CORRECTIVE ACTION TAKEN The subject pump was dismantled for inspection and engineering review.

In addition to pump shaft fracture, it was found that the shaft coupling key was sheared and the motor support brackets cracked.

The motor and pump have been returned to their respective vendors for complete inspection and repair as required. Following their engineering review, changes will be incorporated as required. When the results of the manufacturer's evaluation are received, they will be available for your review of the Three Mile Island Site.

Very truly yours,

, Cl / Iso / 215 3 r T' (, b.

J. G. Miller Vice President JCM:bl .T 011

'yyguhforf Fre C,v.

ya . 2 8.TZ7 w, - . , =. .. ...,

METROPOLITAN EDISON COMPANY

- '--- - :: n e a x s.:: na so:Nc. r- ; n < ;.y : ae, : co: Ts:.spwc.sem __: 3;cc:

N

/.y ,M ych 8 1974

,$fgRg $rf '0., >-

7 2 1974 2\

j' .!,.c, .s .- -

O.:;ilgj$

Mr. A. Giambusso D, 4 ,..,{& 'b', 'zL'.

Deputy Director for Reactor Projects j[//' w f\f

-\

'. Ir Office of Regulation y U. S. Atomic Energy Commission ;E ,.j .

Washington, D.C.

20545 ---

'i. ~

i

'.'.s

Dear Mr. Giambusso:

'/ - -

, y

SUBJECT:

THREE MILE ISLAND NUCLEAR STATION ' ' '- "

UNIT 1 DOCKET N0. 50-289 AMENDMENT NO. 46 Attached are the remaining 80 copies of Amendment 46 to the Operating License for Three Mile Island Nuclear Station Unit 1. This supplements the official filing of Amendment 46 dated March 1, 1974.

Very truly yours, 1 1 J. G. Miller Vice President Attachments 15s,7 256 109.1

.x 7, UNITED STATES OF AMERICA AT03!IC C:ERGY COBOIISSION IN THE MATTER 0?

) -

) DOCKET Mo. 50-289 METROPOLITA'i EDISON COMPANY ) '/ .,

/

CERTIFICATE OF SERVICE _ _ . ,

This is to certify that a copy of Amendment 46 to the Application for Construction Fer=it and Operating License for Three Mile Island Nuclear Station Unit 1, dated March 1,1974, and filed with the United States Atomic Energy Consission on March 1,1974, has this first day of March, 1974 been served on the chief executives of Londonderry Township, Dauphin County, Pennsylvania, and Dauphin County, Pennsylvania, by deposit in the United States mail, addressed as follous:

Dr. Edward O. Swartz, Chairman Board of Supervisors of Londonderry Tcwnship Township Building R. D. 1, Geyers Church Street Middletown, Pennsylvania 17057 and Mr. Charles P. Hoy, Chairman Board of County Commissioners of Dauphin County Dauphin County Court House P. O. Box 1295 Harrisburg, Pennsylvania 17108 FETROPOLITAN EDISON COMPANY

/3

- // '

, i '!I By li_ .{ ' 7 k- .

Vice Fresident

. 1987 257