ML073310008
| ML073310008 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/03/2007 |
| From: | Balwant Singal NRC/NRR/ADRO/DORL/LPLIV |
| To: | Blevins M Luminant Generation Co |
| Singal, Balwant, 415-3016, NRR/DORL/LPL4 | |
| References | |
| TAC MD5639, TAC MD5640 | |
| Download: ML073310008 (5) | |
Text
December 3, 2007 Mr. M. R. Blevins Executive Vice President
& Chief Nuclear Officer Luminant Generation Company LLC ATTN: Regulatory Affairs P. O. Box 1002 6322 North FM 56 Glen Rose, TX 76043
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION, LICENSE AMENDMENT REQUEST 07-001 TO REVISE SURVEILLANCE FREQUENCY FOR THE TURBINE STOP AND CONTROL VALVES SPECIFIED BY THE TECHNICAL REQUIREMENTS MANUAL (TAC NOS. MD5639 AND MD5640)
Dear Mr. Blevins:
By letter to the U.S. Nuclear Regulatory Commission (NRC) dated May 22, 2007, TXU Generation Company LP (subsequently renamed Luminant Generation Company LLC) submitted Technical Requirements Manual changes to revise the surveillance frequency for the turbine stop and control valves for Comanche Peak Steam Electric Station, Units 1 and 2, for NRC review in accordance with Section 50.90 of Title 10 of the Code of Federal Regulations.
The NRC staff has determined that additional information is required to complete the review of the application. The specific information requested is addressed in the enclosure to this letter.
You are requested to respond to the request for additional information (RAI) within 30 days from the issuance of this letter.
The NRC staff considers that timely responses to RAIs help ensure sufficient time is available for NRC staff to complete its review and contribute toward the NRCs goal of efficient and effective use of staff resources.
M. R. Blevins If you have any questions, please contact me at (301) 415-3016.
Sincerely,
/RA/
Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446
Enclosure:
Request for Additional Information cc w/encl: See next page
M. R. Blevins If you have any questions, please contact me at (301) 415-3016.
Sincerely,
/RA/
Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446
Enclosure:
Request for Additional Information cc w/encl: See next page DISTRIBUTION:
PUBLIC LPL4 R/F RidsAcrsAcnwMailCenter RidsNrrDciCvib RidsNrrDeEicb RidsNrrDorlLpl4 RidsNrrLAJBurkhardt RidsNrrPMBSingal RidsNrrDorlDpr RidsOgcRp RidsRgn4MailCenter SSheng, NRR/DCI/CVIB BMarcus, NRR/DE/EICB ADAMS Accession Number: ML073310008
- email dated OFFICE LPL4/PM LPL4/LA CVIB/BC LPL4/BC NAME BSingal JBurkhardt MMitchell*
THiltz DATE 12/3/07 12/3/07 11/26/07 12/3/07 OFFICIAL RECORD COPY
REQUEST FOR ADDITIONAL INFORMATION RELATED TO REVIEW ASSOCIATED WITH REVISION OF TECHNICAL REQUIREMENTS SURVEILLANCE FREQUENCY FOR THE TURBINE STOP AND CONTROL VALVES LUMINANT GENERATION COMPANY LLC COMANCHE PEAK STEAM ELECTRIC STATION, UNITS 1 AND 2 DOCKET NOS. 50-445 AND 50-446 1.
It was stated on Page 6 of the submittal that, the upgraded Turbine Overspeed Protection System is redundant and diverse and most of the devices are tested on line at least once a day. Confirm whether this upgrade was considered in the P10 (probability of a runaway due to a failure of the Overspeed Protection System) calculation. Provide sufficient details for staff review if this upgrade is considered quantitatively.
2.
It was stated on Page 14 of the submittal that, [except for the 26-week testing interval,] all other variables remain the same as in the previous analysis on which the current testing interval of 12 weeks is based. Confirm that both the previous and the proposed analyses are based on the plant-specific turbine information reflecting all turbine modifications (retrofits) made in the Comanche Peak Steam Electric Station, Units 1 and 2. List all deviations of the current methodology, if they exist, from the methodology approved by the staff on July 22, 2003, regarding Siemens Westinghouse Power Corporations missile analysis methodology for General Electric nuclear steam turbine rotors and justify their adequacy.
October 2007 Comanche Peak Steam Electric Station cc:
Senior Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 2159 Glen Rose, TX 76403-2159 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 Mr. Fred W. Madden, Director Regulatory Affairs Luminant Generation Company LLC P.O. Box 1002 Glen Rose, TX 76043 Timothy P. Matthews, Esq.
Morgan Lewis 1111 Pennsylvania Avenue, NW Washington, DC 20004 County Judge P.O. Box 851 Glen Rose, TX 76043 Environmental and Natural Resources Policy Director Office of the Governor P.O. Box 12428 Austin, TX 78711-3189 Mr. Richard A. Ratliff, Chief Bureau of Radiation Control Texas Department of Health 1100 West 49th Street Austin, TX 78756-3189 Mr. Brian Almon Public Utility Commission William B. Travis Building P.O. Box 13326 1701 North Congress Avenue Austin, TX 78701-3326 Ms. Susan M. Jablonski Office of Permitting, Remediation and Registration Texas Commission on Environmental Quality MC-122 P.O. Box 13087 Austin, TX 78711-3087 Mr. Anthony P. Jones Chief Boiler Inspector Texas Department of Licensing and Regulation Boiler Division E.O. Thompson State Office Building P.O. Box 12157 Austin, TX 78711