ML20206H200
| ML20206H200 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 05/04/1999 |
| From: | Alexion T NRC (Affiliation Not Assigned) |
| To: | Cottle W HOUSTON LIGHTING & POWER CO. |
| Shared Package | |
| ML20206H204 | List: |
| References | |
| TAC-MA5065, TAC-MA5066, NUDOCS 9905110088 | |
| Download: ML20206H200 (3) | |
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UNITED STATES g
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NUCLEAR REGULATORY COMMISSION o
WASHINGTON, D.C. 3000MolH
% g,, c May 4, 1999 Mr. William T. Cottle President and Chief Executive Officer STP Nuclear Operating Company
' South Texas Project Electric Generating Station P. O. Box 289 Wadsworth,TX 77483
SUBJECT:
SOUTH TEXAS PROJECT, UNITS 1 AND 2 - EXEMPTION FROM THE REQUIREMENTS OF 10 CFR 50.60 (TAC NOS. MA5065 AND MA5066)
Dear Mr. Cottle:
By letter dated March 18,1999, STP Nuclear Operating Company requested NRC approval of a
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request for exemption from a requirement of Title 10 of the Code of Federal Reaulations (10 CFR) Section 50.60, " Acceptance Criteria for Fracture Prevention Measures for Lightwater i
Nuclear Power Reactors for Normal Operation." This section, in part, requires all power I
reactors to meet the fracture toughness requirements for the reactor coolant pressure boundary set forth in Appendix G to 10 CFR Part 50. The exemption would allow STP Nuclear Operating Compcny to apply American Society of Mechanical Engineers (ASME) Code Case N-514 for determining South Texas Project's cold overpressunzation mitigation system (COMS) pressure setpoint.
j Based on the information provided, there is reasonable assurance that, based on the l
conservatisms contained in the Appendix G methodology, permitting the COMS setpoint to be established such that the vessel pressure would not exceed 110 percent of the limit defined by the pressure-temperature curves, would provide an adequate margin of safety against brittle failure of the reactor vessel. The staff further agrees that limiting the potential for inadvertent COMS actuation may improve plant safety.
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- J3027 9905110088 990504 PDR ADOCK 05000498 P
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W. T. Cottle
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May-4, 1999-The U.S. Nuclear _ Regulatory Cornmission, pursuant to L10 CFR 50.12, has' issued the enclosed l
- exemption for the South Texas Project. A copy of the exemption is being forwarded to the
- Office of the Federal Register for publication.
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Sincerely, 4
ORIGINAL SIGNED BY
. Thomas W.' Alexion, Project Manager, Section 1 -
Project Directorate IV & Decommissioning Division of Licensing Project Management -
l Office of Nuclear Reactor Regulation j
Docket Nos. 50-498 and 50-499 DISTRIBUTION CNorsworthy (e-mail SE)
Docket File -
OGC i
Enclosure:
Exemption PUBLIC ACRS PDIV-1 Reading MMitchel RGramm MBoyle cc w/ encl: See next page TAlexion(2)
DLange,EDO LBerry SRichards JZwolinski/SBlack CJamerson 3
KBrockmen, RIV MGamberoni GHill(4)
LBerry Document Name: G:\\STPFINAL\\EXE5065.WPD l
OFC PDIV-1/RM PDIV-SPM PDIV-1/LA EMCBr4 OGdg I
PDIV-1/SC MGarkoni TAke i LBerry C ( Wh[h/ww RGramh
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NAME DATE' 5/ 3 /99
/9 i/ b/99 h/[/99 y/S.2 /99 M/99
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COPY hES YES YES YES/NO O NO
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OFFICIAL RECORD CdPY OFC-PDIV-1&D/7) plP@
NAME-S.RichardM J.ZwdNfski I
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DATE 6/76/99 6/8/99 COPY iES/M YES/NO '
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- Mr. Williarn T. Cottle STP Nuclear Operating Company South Texas, Units 1 & 2 cc:
Mr. Cornelius F. O'Keefe Jack R. Newman, Esq.
Senior Resident inspector Morgan, Lewis & Bockius U.S. Nuclear Regulatory Commission 1800 M Street, N.W.
P. O. Box 910 Washington, DC 20036-5869 Bay City, TX 77414 l
Mr. T. H. Cloninger Vice President A. Ramirez/C. M. Canady Engineering & Technical Services Cityof Austin STP Nuclear Operating Company Electric Utility Department P. O. Box 289 721 Barton Springs Road Wadsworth,TX 77483 Austin,TX 78704 Office of the Governor Mr. M. T. Hardt ATTN: John Howard, Director Mr. W. C. Gunst Environmental and Natural City Public Service Board Resources Policy P. O. Box 1771 P. O. Box 12428 San Antonio,TX 78296 Austin,TX 78711 q
Mr. G. E. Vaughn/C. A. Johnson Jon C. Wood Central Power and Light Company Matthews & Branscomb l
P. O. Box 289 One Alamo Center Mail Code: N5012 106 S. St. Mary's Street, Suite 700 Wadsworth,TX 74483 San Antonio, TX 78205-3692 INPO Arthur C. Tate, Director Records Center Division of Compliance & Inspection 700 Galleria Parkway Bureau of Radiation Control Atlanta, GA 30339-3064 Texas Department of Health 1100 West 49th Street Regional Administrator, Region IV Austin,TX 78756 U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Jim Calloway j
Arlington,TX 76011 Public Utility Commission of Texas Electric Industry Analysis D. G. Tees /R. L. Balcom P. O. Box 13326 i
Houston Lighting & Power Co.
Austin, TX 78711-3326 P. O. Box 1700 Houston,TX 77251 Judge, Matagorda County Matagorda County Courthouse 1700 Seventh Street Bay City, TX 77414
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