ML20037C301
| ML20037C301 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 01/26/1981 |
| 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, ST-HL-AE-605, NUDOCS 8102030628 | |
| Download: ML20037C301 (4) | |
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The Light Company sesm ummu m u nw no,m.ws: mmems.un January 26, 1981 ST-HL-AE-605 SFN: V-0530 Mr. Karl Seyfrit.
Director, Region IV Nuclear Regulatory Comission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012
Dear Mr. Seyfrit:
South Texas Project Units 1&2 Docket Nos. STN 50-498, STN 50-499 Second Interim Report Concerning Reactor Cavity Ventilation Desian On October 17, 1980, pursuant to 10CFR50.55(e), Houston Lighting &
Power Ccapany notified your office of an item concerning the reactor cavity vertilation design for the South Texas Project.
During a confimatory themal analysis of the reactor coolant piping supports located in the pri-mary shield wall penetrations, it was detemined that the temperature of the primary shield wall concrete in the penetration and along the face exposed to the reactor vessel would exceed the specified limits. The following discussion provides the present status of this item.
A parameter study to define the minimum cooling air flow through the l
clearance between the reactor vessel and the primary shield wall to maintain concrete below its design temperature is undergoing design verification.
In addition, "as built" measurements of the clearance between the reactor vessel insulation and the primary shield wall have been taken.
Corrective action will not be detemined until completion of further engineering evaluations. The next status report on this item will be submitted to your office by July 1,1981.
If there are any questions r',ncerning this item, please contact Mr. Michcel E. Powell at (713) 676-8592.
Very tryly 'ours, NL' e g
3o/7 Execu/Chrea, Jr.
.4 tive ice President i
MEP/mf f[
'1 627 g
January 26, 1981 Houston Lighting & Power Company ST-HL-AE-605 SFN: V-0530 Page 2 cc:
J. H. Goldberg 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 (Lowenstein, Newman, Reis & Axelrad)
Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C. 20555 l
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F ouston Lighting & Power Company January 26, 1981 ST-HL-AE-605 SFN: V-0530 Page 3 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 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 l
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Houston Light;ng & Power Company January 26, 1981 ST-HL-AE-605 SFN: V-0530 Page 4 Charles 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. Nucir $r Regulatory Commission Washingt:
D. C.
20555 Citizens for Equitable Uti ities s
c/o Ms. Peggy Buchorn Route 1, Box 1684 Brazoria, Texas 77422 Pat Coy Citizens Concerned About Nuclear Pcwer 5106 Casa Oro San Antonio, Texas 77422 Betty Wheeler Hoffman, Steeg & Wheeler 1008 S. Madison Amarillo, Texas Brian E. Berwick 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 Commission Washington, D. C. 20555
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