ML19330C494

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First Deficiency Rept Re Ultimate Heat Sink Dam.Soils Originally Thought to Be Nondispersive.Testing Indicates Dispersive Soil.Dam Will Function Satisfactorily
ML19330C494
Person / Time
Site: Wolf Creek Wolf Creek Nuclear Operating Corporation icon.png
Issue date: 06/26/1980
From: Koester G
KANSAS GAS & ELECTRIC CO.
To:
References
NUDOCS 8008080431
Download: ML19330C494 (1)


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xAnsas aAs Ano suCTMC COWANY OLENN L. ECESTER veCR PetteetNT* Opt Nat' OMS June 26, 1980 Mr. Karl V. Seyfrit, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive Guite 1000 Arlington, Texas 76012 KMLNRC-007 Re: NRC Docket No. STN 50-482 Subj: Wolf Creek Generating Station Ultimate Heat Sink Dam Dear Mr. Seyfrit This letter is to confirm our recent telephone conversation during

' which we discussed the Ultimate Heat Sink Dam (UHS). I indicated to you that the testing of the in-place dam materials show the soil types to be mostly dispersive, whereas data from earlier tests made on soils in the area indicated the dam materials would be nondispersive.

The in situ materials have been evaluated by our consultants and it is their judgment that due to the design of the UHS dam and the service conditions under whien it will function, it is satisfactory as constructed and if ever needed will function as intended.

At this time we are unaware of any safety problem and do not consider this an item reportable under Regulation 10CFR50.55(e) .

Because of the importance of this structuce, we want to dispel any question about its adequacy; therefore, we .have decided to load the UHS dam by filling the UHS prior to filling the main lake. We do not know how long this will take as weather conditions will play an important part in determining the fill rate.

We will keep your resident inspector advised as we get close to having the UH9 full so that you may bring in your own specialists to examine the dam under load if you desire to do so.

Yours very truly, GLKabb YT/?

8008080 y 201 N. Market - Wichsta. Kansas - Mad Address: P.O. Box 200 / Wichsta. Kansas 67201 - Telephone: Area Code (316) 261-6451

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