CPSES-200601350, Response to Request for Additional Information Related to Txu Power'S Request for Review of Previously Submitted Topical Reports

Response to Request for Additional Information Related to Txu Power'S Request for Review of Previously Submitted Topical Reports

ML062050011
Person / Time
Site:	Comanche Peak
Issue date:	07/17/2006
From:	Madden F TXU Power
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CPSES-200601350, TAC MC6899, TXX-06125
Download: ML062050011 (3)

Text

TXU Power TXU Power Mike Blevins Comanche Peak Steam Senior Vice President &

Electric Station Chief Nuclear Officer P.O0. Box 1002 (E01)

Glen Rose, TX 76043 Tel: 254 897 5209 Fax: 254 897 6652 mike~blevtns@txu.com CPSES-20060 1350 Log # TXX-06125 July 17, 2006 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NO. 50-445 - RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION RELATED TO TXU POWER'S REQUEST FOR REVIEW OF PREVIOUSLY SUBMITTED TOPICAL REPORTS (TAC NO. MC 6899)

REF: 1 TXU Power letter, logged TXX-05037, from Mike Blevins to the IU. S. Nuclear Regulatory Commission, dated February 17, 2005.

2) NRC memorandum of February 3, 2006 from John Nakoski to David Terao, regarding request for additional information (TAC NO. MC 6899).

Dear Sir or Madam:

In Reference 1, TXU Generating Company LP (TXU Power) requested NRC review of two previously submitted topical reports describing revised accident analysis methodologies that will be necessary to support design and operating activities, as well as licensing actions, related to the replacement of the CPSES Unit I steam generators. The memorandum of Reference 2 identified a list of questions requiring additional information (RAls) to allow NRC"staff to complete this review. These questions were subsequently discussed between TXU Power and NRC reviewers during several telephone calls to clarify the scope of the additional information required.

As Attachment I to this letter, TXU Power provides the NRC questions related to the LOCA RAls (questions 7 and 8) and TXU Power's response immediately following each question. Attachment 2 contains the NRC questions related to the non-LOC-A RAls (questions 1-6, 9, and 10) and TXU Power's response immediately following" each question.

A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway & Comanche Peak 9 Diablo Canyon

• Palo Verde

• South Texas Project e Wolf Creek t -

TXX-06 125 Page 2 of 3 As part of TXU Power's response to these RAIs, this communication contains the following newv commitment which wvill be completed or incorporated into the CPSES licensing basis as noted:

Number Commitment 27409 Within 6 months following a transient on CPSES Unit I that provides sufficient information for model validation, CPSES engineers wvill perform a benchmark comparison of the RETRAN-02 model of CPSES Unit 1, including the A76 steam generator model, to the actual transient to further validate the CPSES Unit 1 model. If the model can not be adequately validated, appropriate actions wvill be taken in accordance wvith the CPSES corrective action program.

The Commitment number is used by TXU Power for the internal tracking of CPSES commitments.

Should you have any questions, please contact Mr. Bob Kidwell at (254) 897-53 10.

I state under penalty of perjury that the foregoing is true and correct.

Executed on 17 July, 2006 Sincerely, TXU Generation Company LP By: TXU Generation Management Company LLC Its General Partner Mike Blevins By:-

'Frd WV. Madden Director, Regulatory Affairs RJK

TXX-06 125 Page 3 of 3 Attachment I -Response to LOCA RANs -Response to non-LOCA RAls c - B. S. Mallett, Region IV M. C. Thadani, NRR Resident Inspectors, CPSES