ML19341A189

Final Deficiency Rept,Initially Reported 800529,re Essential Cooling Water Intake Structure Gantry Crane Seismic Analysis.Sse Response Spectra Values Incorrectly Calculated. Crane & Diesel Generator Fuel Storage Tanks Requalified

ML19341A189
Person / Time
Site:	South Texas
Issue date:	01/15/1981
From:	Oprea G HOUSTON LIGHTING & POWER CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, ST-HL-AE-604, NUDOCS 8101220331
Download: ML19341A189 (5)

Text

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. January 15, 1981

- ST-HL-AE-604 SFN: V-0530 Mr. Karr Seyfrit Director, Region IV Nuclear Regulatory Comission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012 South Texas Project Units 1&2 Docket Nos. STN 50-498, STN 50-499 Final Report Concerning the ECW Gantry Crane Seismic Analysis On May 29, 1980, pursuant to 10CFR50.55(e), Houston Lighting & Power Company notified ,your office of an item concerning seismic qualification of the Essential Cooling Water Intake Structure (ECWIS) gantry crane and the Diesel Generator Fuel Oil Storage Tanks. Interim Reports were sent to your

• office on June 26, 1980, and October 1,1980. In accordance with our interim report comitment, a final report is attached.

Very truly yours,

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Execu ive Vice President MEP/mf Attachment O[7 s

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Final Report Concerning the ECW Gantry Crane Seismic Analysis January 15, 1981 Description of the Incident On May 29, 1980, pursuant to 10CFR50.55(e), Houston Lighting & Power Company notified your office of an item concerning seismic qualification of the Essential Cooling Water Intake Structure (ECWIS) gantry crane and' the Diesel Generator Fuel Oil Storage Tanks. The Safe Shutdown Earthquake (SSE) response spectra values used in designing (OBE) values by 1.5 rather than by a factor offactor 2.0.the two com Basis Earthquake The of 2.0 should have been used in order to envelop the actual required SSE response spectra.

This concern was first identified during a review of the design of the ECWIS gantry crane. A subsequent check of other mechanical specifications revealed a similar situation with the Diesel Generator Fuel Oil Storage Tanks in the Diesel Generator Building.

Corrective Action Seismic re-qualification of the ECWIS gantry crane and the Diesel Generator Fuel Oil Storage Tanks was performed incorporating the higher 2.0 factor.

! These updated calculations on the subject equipment show that the utilization of a 2.0 seismic amplification factor will not result in any design modifications to the equipment.

Recurrence Control The factor of 2.0 has been incorporated into the appropriate structural design basis documents.

Safety Analysis The re-qualification calculation of the equipment using a 2.0 factor provides the basis for the conclusion that the equipment does not present a safety hazard.

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1 January 15, 1981 Houston Lighting & Power Company ST-HL-AE-603 SFN: V-0530 1 Page 3 cc: J. H. Goldberg I D. G. Barker "

Howard Pyle R. L. Waldrop

, H. R. Dean -

D. R. Beeth J. D. Parsons G. B. Painter L. K. English A. J. Granger R. A. Frazar H. S. Phillips (NRC)

J. O. Read Read-Poland,Inc.)

M. D. Schwarz Baker & Botts)

R. Gordon Gooch Baker & Botts)

J. R. Newman 4:.owenstein Newman, Reis. Axelrad & Toll)

Director, Office of Inspection & Enforcement '

Nuclear Regulatory Commission Washington, D. C. 20555 f

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January 15,1981 ST-HL-AE-604 Houston Lighting S: Powsr Compans~ SFN: V-0530 Page 4 M. L. Borchelt Executive Vice President Central Power 6 Light Company P. O. Box 2121 Corpus Christi, Texas 78403 R. L. Range f Central Power 6 Light Company P. O. Box 2221 Corpus Christi, Texas 78403 R. L. Hancock Director of Electrical Utilities City of Austin ,

P. O. Box 1088 Austin, Texas 78767 T. H. Huehlenbeck City of Austin P. O. Box 1088 Austin, Texas 78767 J. B. Poston Assistant General Manager of Operations City Public Service Board --

P. O. Box 1771 San Antonio, Texas 78296 A. vonRosenberg City Public Service Board P. O. Box 1771 San Antonio, Texas 78296 a

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• January 15, 1981 Houston Lighting & Pour Company ST-HL-AE-604 SFN: V-0530 Page 5 l

Charles Bechoefer. Esquire Chaiman, Atomic Safety & Licensing Board U. S. Nuclear Regulatory Comission Washington, O. C. 20555 Dr. James C. Lamb, III 313 Woodhaven Road .

Chapel Hill, North Carolina 27514 Dr. Emeth A. Luebke Atomic Safety & Licensing Comission U. S. Nuclear Regulatory Comission Washington, D. C. 20555 Citizens for Equitable Utilities c/o Ms. Peggy Buchorn Route 1, Box 1684 Brazoria, Texas 77422 Pat Coy Citizens Concerned About Nuclear Power 5106 Casa Oro San Antonio, Texas 77422

' Betty Wheeler -

Hoffman, Steeg & Wh5eler 1008 S. Madison Amarillo, Texas ,

Brian E. nerwick Assistant Attorney General for the State of Texas P. O. Box 12548 Capitol Station Austin, Texas 78711 Bernard M. Bordenick Hearing Attorney Office of the Executive Legal Director

• U. S. Nuclear Regulatory Comission Washington, D. C. 20555 9

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