ML20084U689

Interim Deficiency Rept Re Failure of Flow Switches FIS-68-53 & FS-68-66.Initially Reported on 730508.Glass Graduated Flow Tubes & Glass Windows on Flow Switches Found Broken After Integrated Leak Rate Test Completed

ML20084U689
Person / Time
Site:	Browns Ferry
Issue date:	06/06/1973
From:	Gilleland J TENNESSEE VALLEY AUTHORITY
To:	US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084U431	List: ML20084U446 ML20084U462 ML20084U499 ML20084U519 ML20084U551 ML20084U609 ML20084U662 ML20084U689 ML20084U853 ML20084U869
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8306290180
Download: ML20084U689 (2)

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June 6, 1973 ,.

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i Mr. F. E. Krucci, Director Directorate of Regulatory Operations U.S. Atomic Energy Commiccion Wachington, DC 20545

Dear Mr. Kruesi:

On May 8, 1973, TVA made initial report by telephone l to AEC-DRO Inspector W. S. Little of the failure of two* flow switches at Browns Fcrry Euclear Plant unit

1. In accordance with paragraph 50.55(e) of 10 CFR 50, we submit the enclosed interin report of the failure.

Very truly yourc, I

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[, J . E. Gilleland Accictant to the Manager of Power l Enclosure CC (Enclosure):

Mr. Norman C. Moceley, Director Directorate of Regulatory Operations U.S. Atomic Energy Commincion Region II - Suite 818 230 Peachtree Street, NW.

Atlanta, Georgia 30303 O

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L I; U J.U U d H L

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's FAILt2 OF FIf? S'71TCC S e FIS-63-53 A?:D FIC-CR-fd An initlel report of the failure of fleu cultches FIS-68-53 cuo l'IS-68-66 at the Brcuna Ferry Uuelcar Finnt (Unit 1) uns t.ede by teleph m to W. S. Littic, AEC-D30, Region II Inspector on 1:ay 8,1973, in ex;dicure with 10CFP.50.55(e) . This is an interin report on thoce failures.

The gines graduated flow tubes and the glasa vindcus on the cbove flow owitcheu vere found brohut after the integrated leakage rate test c,f the primary containment had been completed. The containment hc.d been precouriced to 49 psig during Genere.1 Electric test No. 14. The switchen hnd been tested to 225 psig. Each failed switch is located in a coolim. 'ua" diccharge line from the seal cavity of each recirculation pump. 1: s . ;l cwity cooling water is nepplied f ren and raarna to tha recctor o -1 12 m.

cloned conting vater s" sten.

Uc are continuing our investigation into the determination of the a;fety inplientions of these failures and the corrective measures requi: .u.

final report la c::pected to be cubnitted by July 6,1973.

J l