ML19347B508

Interim Deficiency Rept Re Incorrect Input in Calculations Used to Generate Amplified Response Spectra of Reactor Bldg Structures.Detailed Review Initiated & Rept to Be Submitted Pending Review Findings

ML19347B508
Person / Time
Site:	River Bend
Issue date:	09/12/1980
From:	Draper E GULF STATES UTILITIES CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
RBG-8541, NUDOCS 8010150204
Download: ML19347B508 (1)

Text

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1 GULF STATES UTILITIES COMPANY oCS? O

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SEAvvoNT *ExAs??704 AREA COOE 713 938 3343 September 12, 1980

RBG - 8541

Files G9.5, G9.25.1.1 i

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Mr. Karl V. Seyfrit, Director U.S. Nuclear Regulatory Commission 4 Region IV Office of Inspection & Enforcement 611 Ryan Plaza Drive

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1 Suite 1000 l Arlington, TX 76011 l

Dear Mr. Seyfrit:

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a i River Bend Station Unit 1 j Docket No. 50-458

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On August 14, 1980, Gulf States Utilities Company verbally j

l notified your staff of a potentially reportable deficiency with regard to an incorrect input in the calculations used to generate

the Amplified Response Spectra (ARS) of the River Bend Station

, reactor building structures. We have begun a detailed review and

! recalculation of the member forces and the ARS due to the hydro-

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dynamic forces in the suppression pool. Preliminary indications are that none of the concrete structures presently built or released

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for construction are af fected by the incorrect input. No equipment

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has yet been installed, and though some equipment may be installed,

' none will be released for use until the calculations and evaluation to verify the ARS are complete.

We will provide you an interim report by December 31, 1980,

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, and expect to have completed our evaluation by April 1, 1981.

1 Sincerely, 4

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1 E. Linn Draper, Jr.

h 64 Vice President - Technology

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