ML20084H547

Interim Deficiency Rept Re Loss of Suction to Core Spray Pumps During Preoperational Testing.During Rerun of Portions of Preoperational Test GE-12,core Spray Pumps a & C Lost Suction in Higher Flow Ranges

ML20084H547
Person / Time
Site:	Browns Ferry
Issue date:	06/28/1974
From:	Gilleland J TENNESSEE VALLEY AUTHORITY
To:	Knuth D US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084H538	List: ML20084H541 ML20084H547
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8305040605
Download: ML20084H547 (1)

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TENNESSEE CHATTANDOGA,VALLEYTENNESSEEA THOAITY 37401 June 28, 1974 40 s?")','E8Bfe7, PARTN E A Ship Mr. Donald F. Knuth, Director Directorate of Regulatory Operations U.S. Atomic Energy Commission Washington, DC 20545

Dear Mr. Knuth:

BROWNS FERRY NUCLEAR PLANT UNIT 2 - LOSS OF SUCTION TO CORE SPRAY PUMPS DURING PREOPERATIONAL TESTING On May 31, 1974, initial report was made on the subject deficiency ~'

to AEC Inspector W. S. Little at the site. In compliance with paragraph 50.55(e) of 10 CFR 50, this is submitted as an interim report in the occurrence.

m During a rerun of portions of preoperational test GE-12 on the core k spray system, core spray pumps A and C lost suction in the higher 'f4 flow ranges (3125-6250 gpm) while taking suction from the torus.

This occurrence required manual shutdown of the pumps. Valve 6'h.

-M Can HCV-75-1, which is in the suction line to both of the pumps, appeared M, to be only partially open even though the indicator showed it to be 3 fully open. Our investigation of this problem is continuing. We L.'Q will submit the final report on July 28. t'h ery truly yours,g J. E. Gilleland Assistant to the Manager of Power CC: Mr. Norman C. Moseley, Director Directorate of Regulatory Operations U.S. Atomic Energy Commission Region II - Suite 818 230 Peachtree Street, NW.

Atlanta, Georgia 30303 -

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