ML19347A876

Fourth Interim Deficiency Rept Re Damaged Steel Liner Plate in Unit 2 Reactor Containment Bldg.Submits Updated Repair Logic.Subcontract Change Order for Repair Work Negotiated & Executed.Deformed Section of Plate Removed

ML19347A876
Person / Time
Site:	South Texas
Issue date:	09/25/1980
From:	Oprea G HOUSTON LIGHTING & POWER CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, ST-HL-AE-543, NUDOCS 8009300453
Download: ML19347A876 (5)

Text

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The Light comPuy "e ee 'is ni s & ee-er e.o. 8 x iroo see, e . Tex s 77aoi <7is> 228-92i>

September 25, 1980 ST-HL-AE-543 SFN: V-0530 Mr. Karl Seyfrit Director, Region IV Nuclear Regulatory Comission 611 Ryan Plaza Drive, Suite 1000 Ar;in9Mn, Texas 76012

Dear Mr. Seyfrit:

South Texas Project Units 1&2 Docket Nos. STN 50-498, STN 50-499 Fourth Interim Report on Damage to the Steel Liner Plate in the Unit 2 Reactor Containn,ent Building In a previous letter (ST-HL-AE-494), Houston Lighting & Power Company commit-ted to provide the fourth interim report on the liner plate bulge by October 1, 1980. In response to that comitment, this report transmits an updated repair logic (which has been attached), and provides the progress made in resolving the problem.

Significant progress to date is outlined as follows:

a) A drawing has been prepared which defines the damaged section.

b) A liner repair drawing has been developed and approved.

Erection drawings are now being generated.

c) A subcontract change order for the repair work has been negotiated and executed. .

d) The defomed section of liner plate has been removed about 8 inches from the designated perimeter of the final cut. The concrete behind this section has been examined: no unexpected or unusual concrete void fomations or conditions were present, e) An evaluation has been made of the concrete repair and a drawing has been made which defines supplemental reinforcing steel detail and estimated extent of grout repair. 300 5

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"" 4' DT September 25, 1980 ST-HL-AE-543 SFN: V-0530 Page 2 I

f) The remaining section of the plate is being removed to a " neat line" perimeter of 10'-0" x 14'-115". The liner seam edges will be prepared for welding upon receipt of erection drawings.

g) A large section of previously fabricated stiffened liner plate,  !

which was removed earlier to pennit an opening for the equipment hatch, will be utilized for the replacement liner section. A piece will be cut from this large section to fit the dimensions of the removed panel. This activity is in progress.

If there are any questions, please contact Mr. L. R. Jacobi at (713) l 481-7217. 1 Very truly yours,

, . . Y "'

Execu ve Vice President PLW/pjb .

Houston Lighting & Power Compan) September 25, 1980 ST-HL-AE-543 SFN: V-0530 ,

Page 3 cc: D. G. Barker Howard Pyle H. R. Dean R. L. Beeth J. D. Parsons R. L. Waldrop A. J. Granger R. A. Frazar M. D. Scwharz (Baker & Botts)

R. Gordon Gooch (Baker & Botts)

J. R. Newman (Lowenstein, Newman, Reis, Axelrad & Toll)

Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C. 20555 M. L. Borchelt Executive Vice President Central Power & Light Company P. O. Box 2121 Corpus Christi, Texas 78403 R. L. Range Central Power & Light Company P. O. Box 2121 Corpus Christi, Texas 78403 R. L. Hancock Director of Electrical Utilities City of Austin P. O. Box 1088 Austin, Texas 78767 T. H. Muehlenbeck City of Austin P. O. Box 1088 Austin, Texas 78767 J. B. Poston Assistan General Manager cf Operations City Public Service Board .

P. O. Box 1771 San Antonio, Texas 78296 A. vonRosenberg City Public Service Board P. O. Box 177'

' San Antonio, Texas 78296

V Hon. inn 1.ighiing .v h.wer Onmp.m' September 25, 1980 ST-HL-AE-543 SFN: V-0530 i Page 4 Ckarles Bechoefer, Esquire Chairman, Atomic Safety & Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Dr. James C. Lamb, III 313 Woodhaven Road Chapel Hill, North Carolina 27514 Dr. Emmeth A. Luebke Atomic Safety & Licensing Commission U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Steven A. Sinkin Esquire 116 Villita Street San Antonic, Texas 78205 Citizens for Equitable Utilities c/o Ms. Peggy Buchorn Route 1 Box 432 Brazoria, Texas 77422 Richard W. Lowerre, Esquire Assistant Attorney General for the State of Texas P. O. Box 12548 Capitol Station Austin, Texas 78711 Henry J. McGurren. Esquire Hearing Attorney Office of the Executive Legal Director U. S. Nuclear Regulatory Commission Washington, D. C. 20555

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t. STATUS OF REPAIR AS OF SEPTEMBER 10 . 19490 2.DURATl0N OF ACTIVITIES IN WEEKS ARE BEST ESTIMATES.

LEGEN0*

BROWN th ROOT ACTivlTIES PITTSBURGH-DES MOINES ACTIVITIES

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