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

• FI C E s o x 2 9 51 -

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:

]

a i River Bend Station Unit 1 j Docket No. 50-458 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-dynamic forces in the suppression pool. Preliminary indications are that none of the concrete structures presently built or released for construction are af fected by the incorrect input. No equipment 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,

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

1 Sincerely, 4

1 E. Linn Draper, Jr.

h 64 Vice President - Technology

• *1 01so x64 3

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