CPSES-200500561, Withdrawal of License Amendment Request 03-07 Revision to Technical Specification 3.8.1 and 3.8.9, Extension of Allowable Completion Times for Diesel Generators, Qualified Offsite Circuits, and Ac.

Withdrawal of License Amendment Request 03-07 Revision to Technical Specification 3.8.1 and 3.8.9, Extension of Allowable Completion Times for Diesel Generators, Qualified Offsite Circuits, and Ac.

ML050840411
Person / Time
Site:	Comanche Peak
Issue date:	03/17/2005
From:	Madden F TXU Power
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CPSES-200500561, TAC MC1680, TAC MC1681, TXX-05069
Download: ML050840411 (2)

Text

4-VA TXU Power TXU Power Mike Blevins Comanche Peak Steam Senior Vice President &

Electric Station Chief Nuclear Officer P.O. Box 1002 (E01)

Glen Rose, TX 76043 Ref: #IOCFR50.90 Tel: 254 897 5209 Fax: 254 897 6652 riTke.blevinswtxu.corn CPSES-200500561 Log # TXX-05069 March 17, 2005 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 AND 50-446 WITHDRAWAL OF LICENSE AMENDMENT REQUEST (LAR) 03-07 REVISION TO TECHNICAL SPECIFICATION (TS) 3.8.1 AND 3.8.9, EXTENSION OF ALLOWABLE COMPLETION TIMES FOR DIESEL GENERATORS, QUALIFIED OFFSITE CIRCUITS, AND AC ELECTRICAL POWER DISTRIBUTION SUBSYSTEM (TAC NOS. MC1680/MC1681)

REF: 1) TXU Power Letter TXX-03137, from Mike Blevins to U. S. Nuclear Regulatory Commission dated December 31, 2003.

Gentlemen:

In Reference I TXU Generation Company LP (TXU Power) requested an amendment to the CPSES Unit 1 Operating License (NPF-87) and CPSES Unit 2 Operating License (NPF-89) by incorporating changes into the CPSES Unit 1 and 2 Technical Specifications.

The proposed changes would revise Technical Specification (TS) 3.8.1 for AC Sources Operating to extend the allowable Completion Times for the Required Actions associated with restoration of an inoperable Diesel Generator (DG) and an inoperable offsite circuit (i.e., startup transformer). The proposed changes would also revise Technical Specification (TS) 3.8.9 for Distribution Systems - Operating to extend the allowable Completion Times for the Required Actions associated with restoration of an inoperable AC electrical power distribution system (i.e., 6.9 kV AC safety bus).

This proposed change related to TS 3.8.1 (Action B.4) was based on the methodology provided in WCAP-15622, "Risk-Informed Evaluation of Extensions to AC Electrical A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway . Comanche Peak

• Diablo Canyon

• Palo Verde

• South Texas Project

• Wolf Creek AczOI

n TXX-05069 Page 2 of 2 Power System Completion Times," and associated Industry/Technical Specification Task Force (TSTF) Standard Technical Specification (STS) change TSTF-417, Revision 0, which is currently under review by the NRC.

TXU Power's evaluation of the proposed changes included traditional engineering analyses as well as a risk informed approach as set forth in the guidance of Regulatory Guide 1.174, "An Approach for Using Probabilistic Risk Assessment In Risk-Informed Decisions on Plant-Specific Changes to the Licensing Basis," and Regulatory Guide 1.177, "An Approach for Plant-Specific, Risk-Informed Decisionmaking: Technical Specifications."

At the end of 2004, TXU Power completed a major update to the CPSES Probabilistic Risk Assessment (PRA) Model which expanded the loss of offsite power modeling and incorporated the WOG 2000 RCP seal LOCA model, among other updates.

TXU Power intends to incorporate the results of this model into the supporting evaluation for this submittal. Therefore, TXU Power is withdrawing LAR 03-07.

TXU Power anticipates resubmitting another License Amendment Request in 2005 which incorporates these new PRA model results.

This communication contains no new licensing basis commitments regarding CPSES Units I and 2. Should you have any questions, please contact Carl Corbin (254) 897-0121 or email at ccorbinl txu.com.

Sincerely, TXU Generation Company LP By: TXU Generation Management Company LLC Its General Partner Mike Ble ins By: /2,K I W. Madden Director, Regulatory Affairs CBC c - B. S. Mallett, Region IV W. D. Johnson, Region IV D. H. Jaffe, NRR M. C. Thadani, NRR Resident Inspectors, CPSES