ML20216F035
| ML20216F035 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 09/04/1997 |
| From: | Alexion T NRC (Affiliation Not Assigned) |
| To: | Cottle W HOUSTON LIGHTING & POWER CO. |
| References | |
| TAC-M99406, TAC-M99407, NUDOCS 9709110142 | |
| Download: ML20216F035 (4) | |
Text
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September 4, 1997 Mr. William T. Cottle Executive Vice-President &
General Manager, Nuclear Houston Lighting & Power Company South Texas Project Electric Generating Station P. O. Box 289 Wadsworth, TX 77483
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON THE PROPOSED LICENSE AMENDMENT REGARDING REACTOR COOLANT SYSTEM VOLUME - SOUTH TEXAS PROJECT, i
UNITS-1 AND 2 (STP) (TAC NOS. M99406 AND M99407)
Dear Mr. Cottle:
The = staff has reviewed you application for amendment dated August 14, 1997, to revise the allowed tolerance of the reactor coolant system volume provided in Technical Specification 5.4.2 to account for steam generator tube plugging.
The staff has identified a need for additional information as requested in the enclosed request for additional information (PAI).
If you have any questions regarding this request, please contact me at I
(301) 415-1326.
Sincerely, ORIGINAL SIGNED BY:
(-
Thomas W. Alexion, Project Manager Project Directorate IV-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499
Enclosure:
Request for Additional Information
/
f cc w/ encl: See next page B
DJ STRIBUTION:
Docket File PUBLIC EAdensam (EGA1)
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r nog # g 1 UNITED STATES g } NUCLEAR RE2ULATCRY COMMISSION 2 WASHINGTON, D.C. sosse ee01 [ September 4, 1997 Mr. William T. Cottle Executive Vice-President & General Manager, Nuclear Houston Lighting & Power Company South Texas Project Electric Generating Station P. 0.-Box 289 Wadsworth, TX 77483
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON THE PROPOSED LICENSE AMENDMENT REGARDING REACTOR COOLANT SYSTEM VOLUME - SOUTH TEXAS PROJECT, UNITS 1 AND 2 (STP) (TAC NOS. M99406 AND M99407)
Dear Mr. Cottle:
The staff has reviewed you application for amendment dated August 14, 1997, to revise the allowed tolerance of the reactor coolant system volume provided in Technical Specification 5.4.2 to account for steam generator tube plugging. The staff has identified a need for additional information as requested in the enclosed request for additional information (RAI). If you have any questions regarding this request, please contact me at (301) 415-1326. Sincerely, )t7ttfj) Thomas W. Alexion, Pro ect Manager Project Directorate IV-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499
Enclosure:
Request for Additional Information cc w/ encl: See next page h m A-
.Mr.- WilliaiT. Cottle -Houston Lighting & Power Company. South: Texas, Units 1 & 2 =cc:- Mr. David P._. Loveless Jack R. Newman, Esq. Senior Resident Inspector Morgan, Lewis & Bockius U.S. Nuclear Regulatory Commission 1800 M Street, N.W. P. O, Box g10 Washington, DC -20036-5869 Bay City, TX_ 77414 Mr. Lawrence E. Martin Mr. J. C. Lanier/M B. Lee General Manager, Nuclear Assurance Licensing City of Austin Houston Lighting and Power Company . Electric Utility Department P. O. Box 289 ~ 721-Barton Springs Road Wadsworth. TX 77483 Austin, TX 78704 Rufus S.-Scott - Mr._M.'T. Hardt Associate General Counsel Mr. W. C. Gunst Houston Lighting and Power Company City Public. Service Board P. O. Box 61867 4 P. O. Box 1771 Houston, TX 77208 San Antonio, TX 78296 Joseph R. Egan, Esq. L Mr. G. E. Vaughn/C. A. Johnson Egan & Associates. P.C. Central Power and Light Company 2300 N Street, N.W. t P. O. Box 289 _ ashington,_DC 20037 W Mail Code: N5012 Wadsworth, TX 74483 Office.of the Governor ATTN: Andy Barrett, Director INPO -- Environmental Policy Records Center P. O. Box 12428 700 Galleria Parkway-Austin, TX 78711 Atlanta, GA 30339-3064 Arthur C. Tate, Director Regional Administrator, Region IV -Division of.Cocapliance & Inspection U.S.. Nuclear. Regulatory Commission Bureau of Radiation Control' 611 Ryan Plaza Drive, Suite 400 -Texas Department of Health-Arlington,' TX 76011 1100 West 49th Street Austin, TX 78756 Dr. Bertram Wolfe 15453 Via_ Vaquero Texas Public Utility Commission Monte Sereno, CA 95030 ATTN: Mr. Glenn W. Dishong: 7800 Shoal Creek Blvd. .-Judge,.Matagorda County Suite 400N
- Matagorda County Courthouse.
Austin, TX 78757-1024 .1700 Seventh Street . Bay City, TX.77414
0 RE0 VEST FOR ADDITIONAL INFORMATIQH PROPOSED AMENDMENT TO REVISE THE ALLOWED TOLERANCE OF THE REACTOR COOLANT SYSTEM (RCS) VOLUME 1. On page 1 in the safety evaluation of the August 14, 1997, a> plication, it states that the current analysis of record accounts for tie reduction in RCS volume associated with 10% (steam generator) tube plugging with the exception of the uncontrolled boron dilution ovent. However, in HL&P's application for nuclear fuel upgrade to Vantage 5 Hybrid fuel type, dated May 27, 1993 (which assumed 10% tube plugging in the transient and accident analyses), on page 38 of the safety evaluation, Section 4.2.3.4.5, titled " Chemical and Volume Control System Malfunction that Results in a Decrease in Boron Concentration in the Reactor Coolant," there is discussion on boron dilution events. Plea:e explain this apparent discrepancy. 2. What is the time to criticality following a postulated boron dilution event using (1) the previous analysis with the old volume value (the value currently in Technical Specification 5.4.2), and (2) the current analysis of record with the proposed new volume value (which accounts for the reduction in RCS volume associated with 10% tube plugging, as proposed in the application). 1 t + \\ ENCLOSURE ~ ______}}