ML20010E866

Provides Addl Info Re Use of Slickline & Slush Coat Grout, in Response to Questions Raised During 810629 Meeting W/Nrc. Changes Will Be Made to Project Specs/Procedures to Reduce Quantity of Grout Placed on Const Joints

ML20010E866
Person / Time
Site:	South Texas
Issue date:	07/14/1981
From:	Oprea G HOUSTON LIGHTING & POWER CO.
To:	Madsen G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
ST-HL-AE-696, NUDOCS 8109080400
Download: ML20010E866 (3)

Text

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m" s w ya. p-c The Light l

Company n.i.,,, wiino i,,m im,,mm n.,m,,..Tmmom een July 14, 1981 ST-HL-AE-696 SFN:

C-0570 f

Mr. G. L. Madsen, Chief Reactor Project Branch j~IND U. S. Nuclear Reoulatory Commission Office of Inspection and Enforcement 4

Q Region IV U gg[

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611 Ryan Plaza Drive, Suite 1000

$NN Jg T. G @[OF Arlington, Texas 76012 j

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Subject:

South Texas Project Units 1 & 2

@9 Wc Y.7 Docket Nos. 50-498, and 50 499 s bq Use of Slickline and Slush Coat Grout

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Dear Mr. Madsen:

This letter is intended to clarify and provide additional information relative to the use of slickline and slush coat grout on the South Texas Project (SlP) in response to cuestions raised during the June 29, 1981 meetino with Messrs. R. Hall and J. Tapia and subsecuent conversations between these gentlenen, Mr. W. Seidle and our Mr. D. G. Barker.

The application of grout on construction joints facilitates bondino and consolidation of the first layer of concrete placed on a joint, in addition te lubricating the slickline prior to the pumping of concrete.

In order to alleviate any concern that the cuantity of grovt used on a construction joint nicht be of suf ficient magnitude to be considered a structural elenent, chances will be made to the project specifications / procedures to reduce the cuantity of arout placed on construction joints.

joints will be controlled by the amount ordered.The cuantity of grout to be allowed on the The amount ordered shall be calculated based t non a one inch layer rounded up to the nearest one-half cubic yand.

For punp placements, the amount ordered will serve to butter the slickline.

This change will negate the specification allowance of one-half cubic yard per 100 feet of slickline for buttering purposes.

Relative to the grout ( A-0-3-15) that has been used on the project to butter slicklines and as slush coat, we have a high decree of confidence that the quality of the grout exceeds design recuirements based on the batchino a

records and batch plant inspection records fc all sucii grout batched.

The grout proportions are based on the design mix and batched such that the water cement ratio, cuantity of AEA and water reducing retardir.g agent, as well as the cement and fine aggregate quantities satisfy design mix reouirements.

The batching method, verified by inspections, provides assurance that the quality of the grout is nore than sufficient as evidenced by numerous cube strength tests taken on this material.

8109080400 810714 PDR ADOCK 05000498 A

PDR

o i v' Il6mion I.ighting & Power Compan>

July 14, 1981 ST-HL-AE-696 SFN: -C-0570 Page 2 Therefore, Houston Lighting & Power remains of the opinion that sufficient controls commensurate with the safety significance of this material, including its use,'do exist and have existed in the past. These controls have assured that the naterial incorporated into safety-related structures has the reouired l

quali ty. Further controls will reduce the nuantities of this grout to be used,

uch that consioeration of this prout as a structural element is eliminated.

Very truly yours,

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Exe tive ' ' e President l

DGB/f1j l

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Ilouston 1.ighting & l'ov.cr Company cc:

'J. H. Goldberg July la, 1981 J. G Dewease ST-HL-AE-696 D. G. Barker SFN:

C-0570 C. G. Robertson Page 3 Howard Pyle R. L. Waldrop H. R. Dean D.~R. Beeth J. D. Parsons J.>W. Williams

- J. W. Briskin J. E. Geiger STP RMS l

H. S. Phillips (NPC)

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

M. D. Schwarz (Baker & Botts) i R. Gordon Gooch (Baker & Botts)

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

Director, Office of Inspection & Enforcenent Nuclear Regulatory Commission Washington, D. C. 20555 M. L. Bcrchelt/R. L. Range Charles Bechhoefer, Escuire Central Power & Light Company Chairman, Atomic Safety & Licensing Board P. O. Box 2121 U. S. Nuclear Regulatory Ccmmission Corpus Christi, Texas 78403 Washington, D. C.

20555 R. L. Hancock/T. H. Muehlenbeck Dr. James C. Lamb, III i

l City of Austin 313 Woodhaven Road l

P. O. Box 1088 Chapel Hill, North Carolina 27514 l

Austin, Texas 78767 J. B. Poston/A. vonRosenberg Mr. Ernest E. Hill City Public Service Board Lawrence Livermore Laboratery P. O. Box 1771 University of California San Antonio, Texas 78296 P. O. Box 808, L-123 Livermore, California 94550 Brian E. Berwick, Esquire William S. Jordan, III Assistant Attorney for the State of Texas Harmon & Weiss P. O. Box 12548 1725 I Street, N. W.

Capitol Station Suite 506 Austin, Texas 78711 Washington, D. C.

20006 Lanny Sinkin Citizens for Eouitable Utilities, Inc.

l Citizens Concerned About Nuclear Power c/o Ms. Peggy Buchorn 5106 Casa Oro Route 1, Box 1684 San Antonio, Texas 78233 Brazoria, Texas 77422 Jay Gutierrez, Esquire Hearing Attorney

-Office of the Executive Legal Director U. S. Nuclear Regulatory Cortnission Washington, D. C.

20555 Revision Date 7-2-81 I