CPSES-200601676, Revised Response to Request for Additional Information, Relief Request A-1 for Unit 2 Inservice Inspection for Application of Alternative to ASME Boiler and Pressure Vessel Code Section XI Examination Requirements for Class 1 & 2 Pip

Revised Response to Request for Additional Information, Relief Request A-1 for Unit 2 Inservice Inspection for Application of Alternative to ASME Boiler and Pressure Vessel Code Section XI Examination Requirements for Class 1 & 2 Piping

ML062420238
Person / Time
Site:	Comanche Peak
Issue date:	08/23/2006
From:	Madden F TXU Power
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CPSES-200601676, TAC MC9503, TXX-06143
Download: ML062420238 (2)

Text

TXU

• • • "*Power Mike Blevins REF: 10 CFR 50.55a(3)(i)

TXU Power Senior Vice President &

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

Glen Rose. TX 76043 CPSES-200601676 Tel: 254 897 5209 Fax: 254 897 6652 Log# TXX-06143 mike.blevins@txu.com August 23, 2006 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NO. 50-446 REVISED RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION, RELIEF REQUEST A-I FOR THE UNIT 2 INSERVICE INSPECTION FOR APPLICATION OF AN ALTERNATIVE TO THE ASME BOILER AND PRESSURE VESSEL CODE SECTION XI EXAMINATION REQUIREMENTS FOR CLASS I AND 2 PIPING WELDS (INTERVAL START DATE-AUGUST 3,2004, SECOND INTERVAL)

TAC NUMBER MC9503 REF: 1. TXU Power letter, logged TXX-05204, from Mike Blevins to the NRC dated December 15, 2005.

2. TXU Power letter, logged TXX-06101, from Mike Blevins to the NRC dated June 27, 2006.

Gentlemen:

By means of the Reference 1, TXU Generation Company LP (TXU Power) previously submitted relief from the ASME Section XI code examination requirements for inservice inspection of Class I and 2 piping welds (Categories B-F, B-J, C-F-I, and C-F-2) for Comanche Peak Steam Electric Station (CPSES) Unit 2.

Based upon questions provided by Mr. Mohan Thadani of the NRC in an email dated June 1, 2006, TXU Power provided additional information via Reference 2.

Based upon discussions with the NRC staff on August 17, 2006, the following revised response to NRC Question 4.c (from Reference 2) is provided.

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

• Comanche Peak

• Diablo Canyon

• Palo Verde

• South Texas Project

• Wolf Creek

-A047 3wq

TXX-06143 Page 2 of 2 NRC Question 4c: How will MRP-139 be addressed with respect to the RI-ISI Program?

TXU Response to 4c:

As stated previously, the MRP-139 issue and actions to be taken are captured in the Corrective Action Program under SMF-2005-003502 for CPSES Units I and 2. The RI-ISI will address these new degradation mechanisms to their previous RI- ISI rankings for the affected documents and will make the necessary changes to the plant specific documents, which for CPSES are ER-ME-107 and ER-EA-012, Consequence Evaluation of Class I & Class 2 Piping in Support of ASME Code Case N-578.

These welds and examination requirements will then be captured in either the ISI or AISI Program Plans. Specifically, 10 of the 14 DM welds, containing alloy 82/182 material, will be examined under the RI-ISI Program. These welds are 8 RV safe-end to RV nozzle hot/cold leg welds and 2 Pressurizer safe-end to Pressurizer nozzle welds. The remaining 4 Pressurizer safe-end to Pressurizer nozzle welds will be addressed in the AISI Program for Unit 2. All examinations of the welds will follow the requirements of MRP-139 and will be treated like ASME Section XI Code examinations, with regards to procedures used, personnel qualifications, and coverage requirements.

This communication contains no new licensing basis commitments regarding CPSES.

If you have any questions regarding this request, please contact Jack Hicks at (254) 897-6725.

Sincerely, TXU Generation Company LP By: TXU Generation Management Company LLC, Its General Partner Mike Blevins By:

/Fred W. Madden" Director, Regulatory Affairs JCH c- B. S. Mallet, Region IV M. C. Thadani, NRR Resident Inspectors, CPSES