ML20085B524

Interim Deficiency Rept Re Failure of Drywell Penetration Ef Connector 9E.Initially Reported on 730503.Two Pins Found Burned Off Connector & Two Holes Burned Through Connector Base Rupturing Pentrations Seal.Final Rept Due on 730702

ML20085B524
Person / Time
Site:	Browns Ferry
Issue date:	06/01/1973
From:	Gerald Williams TENNESSEE VALLEY AUTHORITY
To:	Kruesi F US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084V088	List: ML20084V087 ML20085B506 ML20085B524
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8307080173
Download: ML20085B524 (2)

Text

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OTENNESSEE VALLEY AgTHORITY CHATTANOOGA, TENNESSEE 37401 June 1,1973 40

$ N E)$ 2 $ $

PARTNE ASHIP Mr. F. E. Kruesi, Director Directorate of Regulatory Operations U.S. Atomic Energy Commission Washington, DC 20545

Dear Mr. Krucsi:

on May 3, 1973, TVA made initial report tojAEC-DRO Inspector W. S. Little of' a failure of Browns FerryJ uclear Plant unit 1 dryvell penetration EF, connector 9E,7 In accordance with paragraph 50.55(e) of 10 CFR 50, ve7 submit the following formal report of the failure which van discovered on April 23, 1973._

The failure of the unit 1 dryvell penetration connector caused the loss of functional capability of the dryvell floor drain sump pumps lA and 1B, equipment drain sump pumps lA and 1B, recirculation pump motor lA and 1B space heaters, equipment handling platform outlet, and valves FCV-68-1, FCV-68-3, FCV-68-80, and FCV-71-2. Investigation revealed thr.t two pins had burned off connector 9E and two holes were burned through the base of the connector, thus rupturing the penetration seal.

The exact cause of the failure is unknown. We are continuing to investigate the failure in order to detemine the corrective action to be taken, and we expect to sub .it a final report on this failure by July 2, 1973.

Very truly yours, d k%

Godwin Williams, Jr. /

l Assistant Manager of Poven CC: Mr. Norman C. Moseley, Director Directorate of Regulatory Operations U.S. Atomic Energy Commission Region II - Suite 818 230 Peachtree Street, NW.

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