ML022460135
| ML022460135 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/12/2002 |
| From: | Jaffe D NRC/NRR/DLPM/LPD4 |
| To: | Terry C TXU Energy |
| Jaffe D, NRR/DLPM, 415-1439 | |
| References | |
| TAC MB6270 | |
| Download: ML022460135 (6) | |
Text
September 12, 2002 Mr. C. Lance Terry Senior Vice President &
Principal Nuclear Officer TXU Energy Attn: Regulatory Affairs Department P. O. Box 1002 Glen Rose, TX 76043
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION, UNIT 1 - UPCOMING STEAM GENERATOR TUBE INSERVICE INSPECTION (TAC NO. MB6270)
Dear Mr. Terry:
Inservice inspections (ISIs) of steam generator (SG) tubes play a vital role in assuring that adequate structural integrity of the tubes is maintained. As required by the plant Technical Specifications, reporting requirements range from submitting a special report, within 15 days following completion of each ISI of SG tubes, that identifies the number of tubes plugged and/or repaired; to submitting a special report, within 12 months following completion of the inspection, that provides complete results of the SG tube ISI. The special report containing the complete results shall include the following:
1.
Number and extent of tubes inspected.
2.
Location and percent of wall-thickness penetration for each indication of an imperfection.
3.
Identification of tubes plugged and/or repaired.
A telephone conference has been arranged with members of your staff to discuss the ongoing results of the SG tube inspections to be conducted during the upcoming Comanche Peak Steam Electric Station, Unit 1 refueling outage. This telephone call will occur after the majority of the tubes have been inspected, but before the SG inspection activities have been completed.
Enclosed is a list of discussion points to facilitate this telephone conference call.
The staff plans to document a brief summary of the conference call as well as any material that you may have provided to the staff in support of the telephone call.
Sincerely,
/RA/
David H. Jaffe, Senior Project Manager, Section 1 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446
Enclosure:
List of Discussion Points cc w/encl: See next page The staff plans to document a brief summary of the conference call as well as any material that you may have provided to the staff in support of the telephone call.
Sincerely,
/RA/
David H. Jaffe, Senior Project Manager, Section 1 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446
Enclosure:
List of Discussion Points cc w/encl: See next page DISTRIBUTION PUBLIC PDIV-1 Reading RidsOgcRp RidsAcrsAcnwMailCenter RidsNrrDlpmLpdiv1 (RGramm)
RidsNrrPMDJaffe RidsNrrLADJohnson RidsRgn4MailCenter (KBrockman)
LLund Accession Number: ML022460135 OFFICE PDIV-1/PM PDIV-1/LA EMCB/SC*
PDIV-1/SC NAME DJaffe DJohnson LLund RGramm DATE 9/11/02 9/11/02 9/10/02 9/11/02 OFFICIAL RECORD COPY
Enclosure OFFICE OF NUCLEAR REACTOR REGULATION STEAM GENERATOR TUBE INSPECTION DISCUSSION POINTS TXU ENERGY COMANCHE PEAK STEAM ELECTRIC STATION, UNIT 1 DOCKET NO. 50-445 The following discussion points have been prepared to facilitate the telephone conference arranged with TXU Energy to discuss the results of the steam generator (SG) tube inspections to be conducted during the upcoming Comanche Peak Steam Electric Station, Unit 1 refueling outage. This telephone call is scheduled to occur towards the end of the planned SG tube inspection interval, but before the unit exits its refueling outage.
The staff plans to document a brief summary of the telephone conference call as well as any material that you may have provided to the staff in support of the call.
1.
Discuss whether any primary to secondary leakage existed in this unit prior to shutdown.
2.
Discuss the results of secondary side pressure tests.
3.
For each SG, provide a general description of areas examined, including the expansion criteria utilized and type of probe used in each area. Also, be prepared to discuss your inspection of the tube within the tubesheet, particularly the portion of the tube below the expansion/transition region.
4.
Provide a summary of the number of indications identified to-date of each degradation mode and SG tube location (e.g., tube-support-plate, top-of-tubesheet, etc.). Also provide information, such as voltages, and estimated depths and lengths of the most significant indications.
5.
Describe repair/plugging plans for the SG tubes that meet the repair/plugging criteria.
6.
Discuss the previous history of SG tube inspection results, including any "look backs" performed, specifically for significant indications or indications where look backs are used in support of dispositioning (e.g., manufacturing burnish marks).
7.
Discuss, in general, new inspection findings (e.g., degradation mode or location of degradation new to this unit).
8.
If SGs contain Alloy 600 thermally treated tubing, discuss actions taken (if any) based on Seabrooks recent findings?
9.
Discuss your use or reliance on inspection probes (eddy current or ultrasonic) other than bobbin and typical rotating probes, if applicable.
10.
Describe in-situ pressure test plans and results, if applicable and available, including tube selection criteria.
11.
Describe tube pull plans and preliminary results, if applicable and available; include tube selection criteria.
12.
Discuss the assessment of tube integrity for the previous operating cycle (i.e., condition monitoring).
13.
Discuss the assessment of tube integrity for next operating cycle (i.e., operational assessment).
14.
Provide the schedule for SG-related activities during the remainder of the current outage.
August 2002 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. Roger D. Walker Regulatory Affairs Manager TXU Generation Company LP P. O. Box 1002 Glen Rose, TX 76043 George L. Edgar, Esq.
Morgan, Lewis & Bockius 1800 M Street, N.W.
Washington, DC 20036-5869 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 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 Mr. Wade Wheatley, Director Waste Permits Division Texas Natural Resource Conservation Commission P. O. Box 13087 (MS 126)
Austin, TX 78711-3087