ML030860123
| ML030860123 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 03/28/2003 |
| From: | Gratton C NRC/NRR/DLPM/LPD2 |
| To: | Christian D Virginia Electric & Power Co (VEPCO) |
| Gratton C, NRR/DLPM 415-1055 | |
| References | |
| Download: ML030860123 (6) | |
Text
March 28, 2003 Mr. David A. Christian Sr. Vice President and Chief Nuclear Officer Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711
SUBJECT:
SURRY POWER STATION, UNIT 1 - UPCOMING STEAM GENERATOR TUBE INSERVICE INSPECTION
Dear Mr. Christian:
Inservice inspections 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 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. 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 phone conference has been arranged with members of your staff and the Materials and Chemical Engineering Branch of the Office of Nuclear Reactor Regulation to discuss the ongoing results of the SG tube inspections to be conducted during the upcoming Surry Power Station, Unit 1, refueling outage. This phone 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 phone conference. A draft of the discussion points was faxed to Mr. Gary Miller of your staff on March 25, 2003.
D. A. Christian The NRC 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. If you have any questions regarding this activity, please call me at 301-415-1055.
Sincerely,
/RA/
Christopher Gratton, Senior Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-280
Enclosure:
Discussion Points cc w/encl: See next page
D. A. Christian The NRC 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. If you have any questions regarding this activity, please call me at 301-415-1055.
Sincerely,
/RA/
Christopher Gratton, Senior Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-280
Enclosure:
Discussion Points cc w/encl: See next page DISTRIBUTION:
PUBLIC M. Yoder C. Khan C. Gratton J. Nakoski OGC ACRS Adams: ML030860123 OFFICE PDII-1/PM PDII-2/LA EMCB/BC PDII-1/SC NAME CGratton EDunnington CKhan JNakoski DATE 3/26/2003 3/26/2003 3/26/2003 3/26/2003 OFFICIAL RECORD COPY
STEAM GENERATOR TUBE INSPECTION DISCUSSION POINTS PREPARED BY THE OFFICE OF NUCLEAR REACTOR REGULATION VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION, UNIT 1 DOCKET NO. 50-280 The following discussion points have been prepared to facilitate the phone conference arranged with the Surry Power Station, Unit 1, licensee to discuss the results of the steam generator (SG) tube inspections to be conducted during the upcoming Surry Power Station, Unit 1, refueling outage. This phone call is scheduled to occur towards the end of the planned SG tube inspection interval, but before the unit exits its refueling outage.
The NRC staff plans to document a brief summary of the conference call as well as any material that may be provided to the NRC 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 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.
Discuss any exceptions taken to the industry guidelines.
5.
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.
6.
Describe repair/plugging plans for the SG tubes that meet the repair/plugging criteria.
7.
Discuss the previous history of SG tube inspection results, including any "look backs" performed. Specifically discuss significant indications or indications where look backs are used in support of dispositioning (e.g., manufacturing burnish marks).
8.
Discuss, in general, new inspection findings (e.g., degradation mode or location of degradation new to this unit).
Enclosure 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.
Provide the schedule for SG-related activities during the remainder of the current outage.
14.
Once-Through SGs - if you have Babcock and Wilcox (B&W) welded plugs installed in the SGs, 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.
15.
Once-Through SGs - describe your inspection/plugging plans with respect to the industry-identified severed tube issue (NRC Information Notice (IN) 2002-02 and IN 2002-02, Supplement 1).
16.
If SGs contain thermally treated tubing (Alloy 600 or 690), discuss actions taken (if any) based on Seabrooks recent findings (Reference IN 2002-21).
Mr. David A. Christian Virginia Electric and Power Company cc:
Ms. Lillian M.Cuoco, Esq.
Senior Nuclear Counsel Dominion Nuclear Connecticut, Inc.
Millstone Power Station Building 475, 5th Floor Rope Ferry Road Rt. 156 Waterford, Connecticut 06385 Mr. Richard H. Blount, II Site Vice President Surry Power Station Virginia Electric and Power Company 5570 Hog Island Road Surry, Virginia 23883-0315 Senior Resident Inspector Surry Power Station U. S. Nuclear Regulatory Commission 5850 Hog Island Road Surry, Virginia 23883 Chairman Board of Supervisors of Surry County Surry County Courthouse Surry, Virginia 23683 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation P.O. Box 1197 Richmond, Virginia 23209 Robert B. Strobe, M.D., M.P.H.
State Health Commissioner Office of the Commissioner Virginia Department of Health P.O. Box 2448 Richmond, Virginia 23218 Surry Power Station Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. Stephen P. Sarver, Director Nuclear Licensing & Operations Support Innsbrook Technical Center Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711 Mr. David A. Heacock Site Vice President North Anna Power Station Virginia Electric and Power Company P.O. Box 402 Mineral, Virginia 23117-0402 Mr. William R. Matthews Vice President - Nuclear Operations Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, Virginia 23060-6711