ML19320C308

Interim Deficiency Rept Re Use of Incorrect Soil Characteristic Value as Design Input to Computer Model for Developing Bldg Response Spectra.Insufficient Info Is Available to Determine Reportability of Possible Deficiency

ML19320C308
Person / Time
Site:	Clinton
Issue date:	03/31/1980
From:	Koch L ILLINOIS POWER CO.
To:
Shared Package
ML19320C303	List: ML19320C302 ML19320C308 ML19320C320 ML19320C330 ML19320C343
References
L14-80(03-31)-0, U-0136, U-136, NUDOCS 8007160638
Download: ML19320C308 (1)

Text

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g Ll4-80(03-31')-9 v U-0136 ILLINDIS POWER COMPANY ]g *

I E___ 500 SOUTH 27TH STREET, DECATUR,ILlJNOIS 62525 j r i March. 31, 1980 I

r l Mr. James G. Keppler i Director, Region III -

' l Office of Inspection and Enforcement

U.S. Nuclear Regulatory Commission

793 Roosevelt Road i

Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

Clinton Power Station Unit 1 Docket No. 50-461

Construction Permit CPPR-137 1

)

On February 29, 1980, Illinois Power Company verbally notified

Mr. Frank Jablonski, NRC Region III, of a potential reportable

!. deficiency per 10CFR50.55(e). We reported at that time that IP had

,-l learned of- a potential deficiency on Clinton Unit I when we were

,I i

advised that an error was found at Sargent & Lundy (S&L) , the architect-engineer, which involved the use of an incorrect soil characteristic value as design. input to a computer model for developing building response spectra.

Illinois Power has continued to investigate the impact of.

this error. Presently, not enough information is available to

, evaluate the impact or significance of this error, or the determi-nation of the reportability of the potential deficiency.

This letter confirms the verbal communication made today to

Mr. H. Wescott, NRC Region III, and is intended to serve as an

! interim report on this potential deficiency. We shall continue i our investigation of this error and will keep you apprised of our '

determination as early as feasible.

. t Sincerely, W

a L. J. Koch t

Vice President 80073sog31!;