ML20084H692

Interim Deficiency Rept Re Potential Design Deficiency in Valve Yoke to Motor Mount Weld.Initially Reported on 740514. Investigation Continues & Testing Scheduled for Dec for Unit 3.Final Rept to Be Provided by 750115

ML20084H692
Person / Time
Site:	Browns Ferry
Issue date:	09/13/1974
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 8305040733
Download: ML20084H692 (2)

Text

e O

V '

TENNESSEE VALLEY AUTHO AITY l CHATTANOOGA, TENNESSEE 37401 September 13, 1974

$M55?$5 PARTN E A SHIP e

Mr. Donald F. Knuth, Director Directorate of Regulatory Operations y U.S. Atomic Energy Commission Washington, DC 20545

Dear Mr. Knuth:

BROWNS FERRY NUCLEAR PLANT UNITS 2 AND 3 - POTENTIAL DESIGN DEFICIENCY IN VALVE YOKE TO MOTOR MOUNT WELD Initial report of the subject potential deficiency was made on May 14, 1974, and was followed by our June 14, July 15, and August 12 letters, J. E. Gilleland to Donald F. Knuth. Because the yoke to motor base welds of FCV-74-58 in unit 1 failed, similar valves (FCV's 74-58 and 74-72) in units 2 and 3 may be subject to the same type of failure.

The investigation of the problem is continuing, and we have scheduled some testing for unit 3 in December. After the tests have been run and the results have been analyzed, we will forward to you the final report on this potential deficiency. We expect that we should be able to provide the report by January 15, 1975.

1 1 Very truly yours, J. E. Gilleland Assistant to the Manager of Power CC: Mr. Norman C. Moseley, Director c

Directorate of Regulatory Operations l

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

Atlanta, Georgia 30303

? l fif i3 <

Q'

,(?

U i

.1

/c,'

e' f5

'N14 L 1

mio TV' 1nyt

. s.

• 8305040733 740913 sY PDR ADOCK 0500026o Y/f.35 S PDR .