ML20039G461
| ML20039G461 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 12/18/1981 |
| From: | Oprea G HOUSTON LIGHTING & POWER CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20039G457 | List: |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, EFR-811218, ST-HL-AE-769, NUDOCS 8201180268 | |
| Download: ML20039G461 (3) | |
Text
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I RO Box 1700 ll Houston. Texas 77001 December 18, 1981 ST-H L-A E-76 9 SFN: V-0530 Mr. John T. Collins Regional Administrator, Region IV Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012
Dear Mr. Collins:
South Texas Project Units 162 Docket Nos. STN 50-498, STN 50-499 Third Interim Report Concerning Computer Program Verification On May 8,1981, Houston Lighting & Power Company, pursuant to 10CFR50.55(e), notified your office of an item concerning computer program (code) verification. The verification methods lack adequate visibility to the user as to whether or not the program versions in use had been verified.
As stated in our Second interim Report, the assessment of computer codes has l
been divided into two phases, l
The Phase I activities have been directed at computer work and program usage by the Brown & Root (B&R) Nuclear Analysis discipline.
Phase 11 was to j
have been a review of codes used by other disciplines.
To assist in the Phase I assessment a consultant firm was engaged by BER.
The review by the consultant firm addresses the appropriateness of the model-ing options, acceptability of code usage, and acceptability and adequacy of the methods selected for computer program verification. The consultant has submitted to B&R a preliminary report on the Computer Program Verification Reports.
B&R is in the process of reviewing these preliminary comments. A final report by the consultant is scheduled for March,1982.
Phase I also includes a review of certain calculations that used the subject computer programs. This review would address the appropriateness of the com-puter codes selected (including options), adequacy of technical approach, and sensitivity of results. The consultant is in the process of performing this review and is scheduled to issue a final report in March,1982. This report will be studied by both BER as well as Bechtel Power Corporation to determine what problems, if any, may exist in the nuclear analysis computer codes.
To date, there continues to be no technical inadequacy which would represent a safety hazard identified by BER or the consultant _ firm with the use of computer programs on STP.
8201180268 810104 DR ADOCK 05000 i
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- Houston Lighting & Power Company December 18, 1981 ST-H L-A E-769 SFN: V-0530 Page 2 Planned Phase ll activities have been modified.
In the earlier report we stated that the consultant would assist in the Phase il assessment of computer program usage by BSR disciplines other than Nuclear Analysis.
Because of our I
decision to use Bechtel Power Corporation (BPC) as our Architect / Engineer, the Phase 11 activity is a part of the transition work package effort.
As discussed with you and your staff, BPC Engineering will perform design reviews necessary to satisfy BPC of the adequacy of the work it accepts and relies upon for use in further design.
If there is insufficient evidence of their adequacy, calculations or design verifications that were performed by BER will be identified as work to be completed by BPC as part of the post-transition design work.
Our next report which will be submitted by June 1,1981 will provide the results of the consultant's final report and the status of t.e echtel review as it pertains to this item.
If there are any questions concerning this item, please contact Mr. Michael E. Powell at (713) 676-8592.
Very/truly ours,
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. 6prea, J.
Ex tive President JGW/mmf l
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Houston Lighting & Power Company cc:
G. W. Oprea, Jr.
December 18, 1981 J. H. Goldberg ST-H L-AE-769 J. G. Dewease SFN: V-0530 D. G. Barker Page 3 1
C. G. Robertson H. Pyle,111 R. A. Frazar D. R. Beeth J. W. Williams J. W. Briskin J. E. Geiger D. E. Sells (NRC) vfl. S. Phillips (NRC) l J. O. Read (Read-Poland, Inc.)
i M. D. Schwarz (Baker & Botts)
R. Gordon Gooch (Baker & Botts)
J. R. Newman (Lowenstein, Newman, Reis, & Axeirad) i STP RMS i
Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C.
20555 j
R. L. Range /G. W. Muench Charles Bechhoefer, Esquire Chairman, Atomic Safety & Licensing Board Central Power & Light Company U. S. Nuclear Regulatory Commission P. O. Box 2121 Corpus Christi, Texas 78403 Washington, D. C.
20555 Dr. Jama C. Lamb, lll R. L. Hancock/G. Pokorny 313 Woodhaven Road City of Austin 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 782 %
P. O. Box 808, L-46 Livermore, California 94550 Brian E. Berwick, Esquire William S. Jordan,111 Assistant Attorney General Harmon & Weiss for the State of Texas 1725 i Street, N. W.
P. O. Box 12548 Suite 506 Capitol Station Washington, D. C.
Lanny Sinkin Citizens for Equitable Utilities, Inc.
l Citizens Concerned About Nuclear Power c/o Ms. Peggy Buchorn l
5106 Casa Oro Route ), 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 Revision Date 10-29-81
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