ML19305E452

Submits Supplemental Info in Response to NRC Request Re Silting of Intake Flume.Sargent & Lundy Engineering Review Concluded That Sedimentation Accumulation in Intake Flume Is Not Design Deficiency.Removal of Silt Is Normal

ML19305E452
Person / Time
Site:	Zimmer
Issue date:	04/01/1980
From:	Borgmann E CINCINNATI GAS & ELECTRIC CO.
To:	Fiorelli G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19305E447	List: ML19305E452
References
QA-1276, NUDOCS 8005120476
Download: ML19305E452 (2)

Text

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THE CINCINNATI GAS & ELECTRIC COMPANY spi CINCIN N ATI. OHIO 4 5201 April 1, 1980

.cEo*[,$$Uc^"," , QA-1276 United States Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention: Mr. Gaston Fiorelli, Chief Reactor Construction and Engineering Support Branch RE: WM. H. ZIMMER NUCLEAR POWER STATION UNIT 1 - INTAKE FLUME SEDIMENTATION W.O. 57300-957, JOB E-5590 Gentlemen:

In accordance with a request from Mr. Eugene Gallagher of your office, we are providing this supplemental letter concerning silting of the intake flume and Sargent & Lundy's review of the situation to determine whether it should be classified as a Part 21 item.

Sargent & Lundy did conduct an engineering review and concluded that the sedimentation accumulation in the intake flume is not a design deficiency. Documentation identified this condition in early 1974 and copies of this documentation were provided to Mr. Gallagher at the site for his review. We have also reviewed the data serving as a basis for Sargent & Lundy's conclusion and concur that removal of silt from the intake flume is a normal plant operational function.

The depositing of silt in the service water intake flume is continuing to be evaluated and the data, when collect ed, will be the basis for the establishment of a monitoring program to assure that river water is always available for the service water system. The monitoring pro-gram is under development at this time and upon completion, Region III will be apprised of the program in detail. The plan vill also address conveyance of silt through the service water system, adequate blowdown of equipment to assure reliable operation, and other precautions required by use of Ohio River water for cooling purposes.

APR 3 1980 1

i To: United States Nuclear Regulatory Commission Page #2 Re: Wm. H. Zimmer Nuclear Power Station Unit 1 - Intake Flume Sedimentation We are'providing this letter to address the NRC

. concern regarding an outstanding potential Part 21 with regards to silting of the Zimmer intake flume. As

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indicated above, we concur with Sargent & Lundy's analysis, concluding that it is not reportable under Part 21 requirements.

We trust that the above response is in compliance with your request; however, if further information is required, please contact us.

Very truly yours, THE CINCINNATI GAS & ELECTRIC COMPANY

1. '~~

By E. A. BORGMANN EAB:mjl