ML20028G834

Forwards Calculation SCG1S361, Foundation Investigation of ERCW Pumping Station Foundation Cells

ML20028G834
Person / Time
Site:	Sequoyah
Issue date:	08/28/1990
From:	Wallace E TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20028G835	List: ML20028G834 ML20028G836
References
NUDOCS 9009050101
Download: ML20028G834 (1)

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' TENNESSEE VALLEY AUTHORITY CH ATTANOOGA, TENNESSEE 374ol:

SN'157B Lookout Place

/LU6 281990

'U.S. Nuclear Regulatory Commission 3

ATTN: Document Control Desk Washington, D.C.

20555 Gentlenen:

In the Matter of

).

Docket Nos. 50-327-Tennessee Valley Authority

)

50-328 SEQUOYAH NUCLEAR PLANT (SQN) - ESSENTI AL RAW COOLING WATER (ERCW) PUMPHOUSE FOUNDATION AND ERCW PUMPING STATION ACCESS CELLS

References:

1.

TVA letter to NRC dated December 28, 1988, "Sequoyah Nuclear Plant (SQN) - Essential Raw Cooling Water (ERCW) Pumphouse Foundation and ERCW Pumping Statinn Access Cells" 2.

TVA let st,to NRC dated March 1, 1990, "Sequoyah Nuclear Plant (SQN) - Essential Raw Cooling Water.(ERCW) Pumphouse p

Foundation'and ERCW Pumping Station Access Cells" As committed in References 1 and 2, this letter provides the final report for the limited exploration program of the ERCW pumphouse foundation. Contained within the report is the evaluation of the seismic qualification of the pumphouse equipment, the evaluation of the pumphouse deflections, and the evaluation of the operating basis earthquake concurrent with water level at Elevation 704. The roadway access cells final report was submitted by Reference 2.

The enclosure contains TVA's Calculation SCG1S361, which includes the final report-for the foundation investigation of the ERCW pwnphouse. The conclusions of the calculation and the final report are that the structural integrity of the pumping station foundation cells ia confirmed, the foundation will perform its intended function under design conditions,'and no additional' investigation is necessary.

i No commitments are contained in this submittal.

Please direct questions concerning this issue to K. S. Whitaker at (615) 843-7748.

Very truly yours.

TENNESSEE VALLEY AUTHORITY A

E. G. Wallace, Manager Nucicar Licensing and Regulatory Affairs 0 90 $ f)

~DO Enclosure 9009050101 900829 cc:

See page 2 hDR ADOCK 0500 7

\\

An Equal Opportunity Employer

2 d (fh ll pggg U.S. Nuclear _ Regulatory Commission Enclosure-cc Ms. S. C. Black, Deputy Director (w/ Enclosure)

Project Directorate 11-4 U.S. Nuclear Regulatory Commission One White Flint. North 11555 Rockv113e Pike-Rockville, Maryland 20852

-Mr. J. N. Donohew, Project Manager (w/ Enclosure)

U.S. Nuclear Regulatory Commission One White Flint, North.

11555 Rockville Pike Rockville, Maryland 20852 NRC Resident Inspector (w/ Enclosure)

Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 Mr. B. A. Wilson, Project Chief (w/ Enclosure)

U.S. Nucicar Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900

-Atlanta, Georgia 30323

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