ML20005B798

Second Interim Deficiency Rept Re Computer Program Verification,Initially Reported on 810508.Assessment of Computer Codes Used on Facilities in Progress.No Technical Inadequacy Found.Next Rept by 811215

ML20005B798
Person / Time
Site:	South Texas
Issue date:	08/27/1981
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, SFN:-V-0530, SFN:-V-530, ST-HL-AE-720, NUDOCS 8109020239
Download: ML20005B798 (3)

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The Light Company noi.,,, usinig u- m,x mi n_i.,n.wx, ,,mii oms.mn August 27, 1981 ST-HL-AE-720 SFN: V-0530 Mr. Karl Seyt rit Director, Region IV ,-

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611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012

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Dear Mr. Seyfrit. ,

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South Texas Project h, [

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Docket Nos. STN S0-498, SfN 50-499 y $W Second Interim Report Concerning Com_utar Program Verification

-f On May 9, 1981. Houston L ;hting & Power Company, pursuant to 10CFRSO.SS(e' nctified your office of an item concerning computer program (code) verifica iva. The verification methods lack adequate visibility to the user as to whather or not the program versions in use have been verified.

An assessme.it of computer codes used on the South Texas Project is in progress. This assessment is divided into two phases. The Phase I activities are being directad at computer work and program usage by the Brown & Root Nuclear Analysis d scipline. This area has been selected for the initial assessment because o' the significant interdiscipline usage of data developed by Brown & Root Nuclear Analysis. Phase II of the assessment will focus on computer program usage by Brown & Root disciplines other than Nuclear Analysis.

For Phases I and 11 activities, Brown & Root has engaged an independent agency to review existing computer program verification reports (CPVR's) in order to specifically judge the qualification of codes used on the South Texas Project. inis review will address the appropriateness of the modeling options, acceptability of code usage, and acceptability and adequacy of the methods selected for computer program verification.

Subsequent to review of CPVR's, the independent agency will review calcula-tions. This review will address the appropriateness of the computer codes selected (including options), adequacy of technical approach, and sensitivity of results. The objective of the above activities is to determine the status and adequacy of the South Texas Project computer program application as well as T6F7 computer program qualification. 5 I O P109020239 810827 PDR ADOCK 05000498 PDR S

!!ouston 1.ighting & l'ower Conipuiy August 27, 1981 ST-HL-AE-720 SFN: V-0530 Page 2 In addition to the assessment of Brown & Root's previous usage of computer orograms, procedural requirements are beinq revised and/or established to strengthen Brown & Root's existing program for the control, usage, and c c plication of computer codes. The need for a technical reference docunent (TRD) to augment procedural requirements aimed at preventing a recurrence of this concern is being evaluated.

To date, there has been no technical inadequacy identified in the use of computer programs which would preclude the safe operations of the plant.

The next report concerning this item will be submitted to your office by December 15, 1981.

If there are any questions concerning this iten, please contact Mr. Michael E. Powell at (713) 676-8592.

Very truly yo,urs,

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,/ Exec ive Vi President MEP/amj l

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cc: J. H. Goldberg August 27, 1981 J. G. Dewease ST-Hl.-AE-/20 D. G. Earker SFN: V-0530 C. G. Robertson Page 3 Howard Pyle R. L. Waldrop H. R. Dean D. R. Beeth J. D. Parsons J. W. Willians J. W. Briskin J. E. Geiger STP RMS H. S. Phillips (NRC)

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

M. D. Schwarz (Baker & Botts)

R. Gordon Gooch (Baker & Botts)

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

Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C. 20555 R. L. Range /G. W. Muench Charles Bechhoefer, Esquire Central Power & Light Company Chairman, Atomic Safety & Licensing Board P. O. Box 2121 U. S. Nuclear Regulatory Con 11ssion Corpus Christi, Texas 78403 Washington, D. C. 20555 R. L. Hancock/G. Pokorny Dr. James C. Lamb, III City of Austin 313 Woodhaven Road P. O. Box 1088 Chapel Hill, North Carolina 27514 Austin, Texas 78767 J. B. Poston/A. vonRosenberg Mr. Ernest E. Hill City Public Service Board Lawrence Livermore Laboratory P. O. Box 1771 University of California San Antonio, Texas 78296 P. O. Box 808, L-46 Livermore, California 94550 Brian E. Berwick, Esquire William S. Jordan, III Assistant Attorney for the State of Taxas Harmon & Weiss P. O. Box 12548 1725 1 Street, N. W.

l Capitol Station Suite 506 Austin, Texas 78711 Washington, D. C. 20006 Lanny Sinkin Citizens for Equitable Utilities, Inc.

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 Commission Washington, D. C. 20555