ML19208B545

Submits Interim Rept Re Silting Condition in River Pump House Intake Flume & Intake Structure,Reported in 790620 Ltr.Caused by Various Seasonal River Conditions. Sedimentation Monitoring Program to Be Implemented

ML19208B545
Person / Time
Site:	Zimmer
Issue date:	07/23/1979
From:	Borgmann E CINCINNATI GAS & ELECTRIC CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19208B542	List: ML19208B545
References
REF-PT21-79-189-000 QA-1168, NUDOCS 7909200535
Download: ML19208B545 (2)

Text

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THE CINCINNATI GAS & ELECTRIC COMPANY sutr ciuciuwanosso eroi 2

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July 23,19 79 QA-1168 U. S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention: Mr. J. G. Keppler Director Gentlemen:

RE: WM. H.

ZIMMER NUCLEAR POWER STATION - UNIT 1 SERVICE WATER INTAKE STRUCTURE 50.55 (e)-

W.O. #57300-957_ JOB E-5590 On June 20, 1979, we submitted our letter QA-1148 to your office, identifying a silting condition which had been dis-covered in the river pump house intake flume and intake structure.

We that have it was evaluated influenced theto cause a ofextent large this condition by andseasonal various have determined river conditions.

bulkhead between September,1976 and March,1978.The During the river entranc period (2) of September, 1976 through April 24, 1979, there were two apparent duration flood stages of the Ohio River which were the long intake flume. causeTheof much serviceof water the collection of sedimentation pumps were not in operation in the during most of this period and as the river increased in elevation and subsequently returned to pool stage, in suspension was deposited within the intake flume behind thethe silt normally held bulkhead.

A thorough inspection of the intake flume and the service water pump bay was conducted and a significant mmount of sedi-mentation was discovered. We are presently in the process of removing this sedimentation and anticipate that during. normal plant parable operation similarcondition.

sedimentation circumstances will not result in a com-Also, during operation of the plant, a sedimentation monitoring program will -be implemented to assure that excess sedimentation is not accumulated in the intake.

3W2G1 JUL 261979 7 909 2 00f530$I-

THE CINCINNATI GAS & ELECTRIC COMPANY vo: U.

h S. Nuclear Regulatory Commission July 23,1979 FROM: E. A. Borgmann QA-ll68

. . pact so, 2 evaluated,Hardware to carry out this monitoring program is being and procedures will be developed which will assure that the intake consistent flume and with operational structure are maintained inon a requirements. condi In accordance with 10CFR50.55(e),

design and construction, which were it to remain uncorrecteda deficiency found could adversely affect the safe operation of the nuclear power ,

plant at any time throughout the expected lifetime of the plant and is which represents considered any one a reportable item.of four other specified conditions have not remained uncorrected, and the corrective cleaning actionTh implemented the plant. has assured non-degredation of the safe operation of We, reportable under the requirements of 10CFR50.55 We will (e) .therefor is established and include a copy of the plan for your in mation. -

We trust that this letter of 10CFR50.55 (e)regarding the monitoring program, w,ill satisfy those and close the item reported on June 18, 1979 relative to silting of the service water intake structure.

Yours very truly, THE CINCINNATI GAS & ELECTRIC COMPANY W

E. A. Borgmann Sr. Vice President WWS:jk d g 4,'hb V t'