ML022420076

Upcoming Steam Generator Tube Inservice Inspection (Tac No. MB6183)

ML022420076
Person / Time
Site:	Millstone
Issue date:	08/29/2002
From:	Nerses V NRC/NRR/DLPM/LPD1
To:	Price J, Danni Smith Dominion Nuclear Connecticut
Nerses V, NRR//DLPM, 415-1484
References
FOIA/PA-2005-0210, TAC MB6183
Download: ML022420076 (6)

Text

August 29, 2002 Mr. J. A. Price Site Vice President - Millstone Dominion Nuclear Connecticut, Inc.

Mr. David A. Smith Rope Ferry Road Waterford, CT 06385

SUBJECT:

MILLSTONE POWER STATION, UNIT NO. 3 - UPCOMING STEAM GENERATOR TUBE INSERVICE INSPECTION (TAC NO. MB6183)

Dear Mr. Price:

Inservice inspections of steam generator (SG) tubes play a vital role in ensuring that adequate structural integrity of the tubes is maintained. As required by the plants technical specifications, reporting requirements range from submitting a special report within 15 days following completion of each inservice inspection 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 inservice inspection.

A phone conference will be arranged with members of your staff to discuss the ongoing results of the SG tube inspections to be conducted during the upcoming Millstone Power Station, Unit No. 3 refueling outage. We would like to have this phone call after the majority of the tubes have been inspected, but before the SG inspection activities have been completed. The preferable time would be when the SG inspection is approximately 70% complete. Enclosed is a list of discussion points to facilitate this phone conference. 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 call.

Sincerely,

/RA/

Victor Nerses, Senior Project Manager, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-423

Enclosure:

As stated cc w/encl: See next page

ML022420076 OFFICE PDI-2/PM PDI-2/LA EMCB/SC PDI-2/SC(A)

NAME VNerses TClark LLund SRichards for JZimmerman DATE 8/28/02 8/28/02 8/29/02 8/29/02 STEAM GENERATOR (SG) TUBE INSPECTION DISCUSSION POINTS PREPARED BY THE OFFICE OF NUCLEAR REACTOR REGULATION DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION, UNIT NO. 3 DOCKET NO. 50-423 The following discussion points have been prepared to facilitate the phone conference to be arranged with Dominion Nuclear Connecticut, Inc. (licensee or DNC) to discuss the results of the SG tube inspections to be conducted during the upcoming Millstone Power Station, Unit No. 3 refueling outage. This phone call is scheduled to occur toward 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 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. Once Through Steam Generators - if you have Babcock and Wilcox (B&W) welded plugs installed in the steam generators, be prepared to discuss the actions taken in response to Framatomes notification of the effect of tubesheet hole dilation on the service life of B&W welded plugs.

5. Once Through Steam Generators - describe your inspection/plugging plans with respect to the industry-identified severed tube issue (Information Notice (IN) 2002-02 and IN 2002-02, Supplement 1).

6. 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.

7. Describe repair/plugging plans for the SG tubes that meet the repair/plugging criteria.

8. 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).

Enclosure

9. Discuss, in general, new inspection findings (e.g., degradation mode or location of degradation new to this unit).

10. If steam generators contain Alloy 600 thermally treated tubing, discuss actions taken (if any) based on Seabrooks recent findings?

11. Discuss your use or reliance on inspection probes (eddy current or ultrasonic) other than bobbin and typical rotating probes, if applicable.

12. Describe in-situ pressure test plans and results, if applicable and available, including tube selection criteria.

13. Describe tube pull plans and preliminary results, if applicable and available; include tube selection criteria.

14. Discuss the assessment of tube integrity for the previous operating cycle (i.e., condition monitoring).

15. Discuss the assessment of tube integrity for next operating cycle (i.e., operational assessment).

16. Provide the schedule for SG-related activities during the remainder of the current outage.

Millstone Power Station Unit 3 cc:

Ms. L. M. Cuoco Mr. D. A. Christian Senior Nuclear Counsel Senior Vice President - Nuclear Operations Dominion Nuclear Connecticut, Inc. and Chief Nuclear Officer Rope Ferry Road Innsbrook Technical Center - 2SW Waterford, CT 06385 5000 Dominion Boulevard Waterford, CT 06385 Edward L. Wilds, Jr., Ph.D.

Director, Division of Radiation Senior Resident Inspector Department of Environmental Protection Millstone Nuclear Power Station 79 Elm Street c/o U.S. Nuclear Regulatory Commission Hartford, CT 06106-5127 P. O. Box 513 Niantic, CT 06357 Regional Administrator, Region I U.S. Nuclear Regulatory Commission Mr. G. D. Hicks 475 Allendale Road Director - Nuclear Station Safety King of Prussia, PA 19406 and Licensing Dominion Nuclear Connecticut, Inc.

First Selectmen Rope Ferry Road Town of Waterford Waterford, CT 06385 15 Rope Ferry Road Waterford, CT 06385 Mr. D. A. Smith Manager - Licensing Mr. P. J. Parulis Dominion Nuclear Connecticut, Inc.

Manager - Nuclear Oversight Rope Ferry Road Dominion Nuclear Connecticut, Inc. Waterford, CT 06385 Rope Ferry Road Waterford, CT 06385 Ms. Nancy Burton 147 Cross Highway Mr. W. R. Matthews Redding Ridge, CT 00870 Vice President and Senior Nuclear Executive - Millstone Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Ernest C. Hadley, Esquire P.O. Box 1104 West Falmouth, MA 02574-1104 Mr. John Markowicz Co-Chair Nuclear Energy Advisory Council 9 Susan Terrace Waterford, CT 06385 Mr. Evan W. Woollacott Co-Chair Nuclear Energy Advisory Council 128 Terrys Plain Road Simsbury, CT 06070

Millstone Power Station Unit 3 cc:

Mr. William D. Meinert Nuclear Engineer Massachusetts Municipal Wholesale Electric Company Moody Street P.O. Box 426 Ludlow, MA 01056 Mr. S. E. Scace Director - Nuclear Engineering Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Mr. M. J. Wilson Manager - Nuclear Training Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385