ML20084H706

Interim Deficiency Rept Re Weld Yoke to Motor Mounting Plate FCV-74-58.Initially Reported on 740514.Yoke Broke from Operator at Yoke to Motor Base Welds.Investigation Continuing to Determine Exact Cause & Corrective Action

ML20084H706
Person / Time
Site:	Browns Ferry
Issue date:	06/14/1974
From:	Gilleland J TENNESSEE VALLEY AUTHORITY
To:	Knuth D US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084H694	List: ML20084H692 ML20084H696 ML20084H698 ML20084H702 ML20084H706 ML20084H709
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8305040763
Download: ML20084H706 (1)

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b TENNESSEE VALLEY AUTHOAITY i CHATTANOOGA, TENNESSEE 37401 1

J jh June 14, 1974 4,y,y,0,,,,y os= peopte iN PARTNERSHIP

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~] Mr. Donald F. Knuth, Director j Directorate of Regulatory Operations j U.S. Atomic Energy Commission Washington, DC 20545 ) p ) b g c7 i

Dear Mr. Knuth:

Initial report of a potential design deficiency involving weld yoke-to-motor mounting plate FCV-74-58 at Browns Ferry Nuclear Plant units 2 and 3 was made on May 14, 1974. In accordance with paragraph 50.55(e) of 10 CFR 50, this is submitted as an interim report.

During an outage of unit 1, MOV l-FCV-74-58 failed to operate properly. An investigation revealed the yoke broke from i the operator at the yoke-to-motor base welds. This was reported to W. S. Little, AEC-DRO, by telephone on May 14, 1974, as i a potential design deficiency with respect to Browns Ferry l units 2 and 3.

l Further investigation is under way to determine the exact cause of the apparent failure and corrective action required.

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' We expect to furnish a final report of this deficiency by July 12, 1974.

Very truly yours, AJ,E.Gilleland Assistant to the Manager of Power l . CC

Mr. Norman C. Moseley, Director l Directorate of Regulatory Operations

! U.S. Atomic Energy Commission l t Region II - Suite 818 230 Peachtree Street, NW.

j Atlanta, Georgia 30303 l.

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