ML060410173

Comanche Peak, Submittal of Unit 1 Eleventh Refueling Outage

ML060410173
Person / Time
Site:	Comanche Peak
Issue date:	02/03/2006
From:	Madden F W TXU Generation Co, LP, TXU Power
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CPSES-200600267, GL-95-005, SG-SGDA-05-51, TXX-06025
Download: ML060410173 (3)

Text

• TXU Power Tlu Power Connche Peak Stem Electic Staton P.0 Box 1002 (E01)Gin Rose, TX 76043 Tel: 254 897 5209 IFax 254 897 6652 uike.b evinsbw.com Mike Blevins Senior Vice President

&Chief Nuclear Officer Ref: 10 CFR 50.55a(g)GL 95-05 CPSES-200600267 Log # TXX-06025 February 03, 2006 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)UNIT 1, DOCKET NO. 50-445 SUBMITTAL OF UNI[T 1 ELEVENTH REFUELING OUTAGE (IRF 1)GL 95-05 REPORT Gentlemen:

Pursuant to the guidance of Attachment 1 to the Generic Letter (GL) 95-05 "Voltage-Based Repair Criteria for Westinghouse Steam Generator Tubes Affected by Outside Diameter Stress Corrosion Cracking," TXU Generation Company LP (TXU Power)submits the enclosed 90-day report.This report provides justification fo:r continued application of the voltage-based repair criteria for outside diameter stress corrosion crack (ODSCC) indications at support plate intersections.

The report summarizes bobbin and rotating pancake probe data at support plate intersections from the end of cycle eleven (EOC- 11) inspection and presents Monte Carlo analysis results for steam line break (SLB) leak rates and conditional burst probabilities based on the actual measured EOC- 11 voltage and projected EOC-12 voltage distributions.

A member of the STARS (Strategic Teaming and Resource Sharing) Alliance-A 0c (Callaway

• Comanche Peak

• Diablo Canyon

• Palo Verde

• South Texas Project

• Wolf Creek TXX-06025 Page 2 of 2 Additionally, the enclosed report concludes that based upon the EOC- I 1 inspection results, and estimated SLB leak rates and tube burst probabilities for EOC- 12, the requirements of Generic Letter 95-05 for continued application of voltage-based alternate repair criteria for full cycle operation of the steam generators during cycle 12 are met.This communication contains no new licensing basis commitments regarding CPSES Unit 1. If you have any questions about this communication, please contact Mr.Robert Kidwell at (254) 897-531(0.

Sincerely, TXU Generation Company LP By: TXU Generation Management Company LLC, Its General Partner Mike Blevins By: d W.Madden Director, Regulatory Affairs RJK Enclosure c -B. S. Mallett, Region IV (w/o Encl)M. C. Thadani, NRR (w/o Encl)Resident Inspectors, CPSES (w/o Encl)

ENCLOSURE TO TXX-06025 COMANCHE PEAK STEAM ELECTRIC STATION UNIT -1 CYCLE 12 VOLTAGE-BASED REPAIR CRITERIA 90-DAY REPORT SG-SGDA-05-51 January 2006