ML050030033
| ML050030033 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 01/03/2005 |
| From: | Stephen Monarque NRC/NRR/DLPM/LPD2 |
| To: | Christian D Virginia Electric & Power Co (VEPCO) |
| Monarque S | |
| References | |
| TAC MC2072, TAC MC2073 | |
| Download: ML050030033 (4) | |
Text
January 3, 2005 Mr. David A. Christian Senior Vice President - Nuclear Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060
SUBJECT:
SURRY POWER STATION, UNITS 1 AND 2 - REVIEW OF 2003 ANNUAL STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT (TAC NOS.
Dear Mr. Christian:
By letter dated February 23, 2004, as supplemented by letter dated November 1, 2004, Virginia Electric and Power Company (VEPCO) submitted the results of the annual steam generator tube inspections conducted during the 2003 refueling outages at Surry Power Station, Units 1 and 2. The U.S. Nuclear Regulatory Commission (NRC) staff reviewed the results of these inspections in order to determine whether additional followup activities were warranted.
Based on a review of the information provided by VEPCO, the NRC staff concludes that VEPCO has provided sufficient information to determine that there are not any issues that warrant additional followup at this time. The NRC staffs review of VEPCOs report is enclosed.
Sincerely,
/RA/
Stephen R. Monarque, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-280, 50-281
Enclosure:
NRC Staff Review of 2003 Annual Steam Generator Inservice Inspection Summary Report cc w/encl: See next page
Mr. David A. Christian Senior Vice President - Nuclear Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060
SUBJECT:
SURRY POWER STATION, UNITS 1 AND 2 - REVIEW OF 2003 ANNUAL STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT (TAC NOS.
Dear Mr. Christian:
By letter dated February 23, 2004, as supplemented by letter dated November 1, 2004, Virginia Electric and Power Company (VEPCO) submitted the results of the annual steam generator tube inspections conducted during the 2003 refueling outages at Surry Power Station, Units 1 and 2. The U.S. Nuclear Regulatory Commission (NRC) staff reviewed the results of these inspections in order to determine whether additional followup activities were warranted.
Based on a review of the information provided by VEPCO, the NRC staff concludes that VEPCO has provided sufficient information to determine that there are not any issues that warrant additional followup at this time. The NRC staffs review of VEPCOs report is enclosed.
Sincerely,
/RA/
Stephen R. Monarque, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-280, 50-281
Enclosure:
NRC Staff Review of 2003 Annual Steam Generator Inservice Inspection Summary Report cc w/encl: See next page Distribution:
PUBLIC KLandis, RII ACRS MYoder LLund OGC PDII-1 R/F EDunnington MMurphy SMonarque ADAMS: ML
- See memorandum dated 11/23/2004 OFFICE PM:PDII-1 LA:PDII-2 EMCB(C):SC*
SC:PDII-1 NAME SMonarque EDunnington LLund JNakoski DATE 12/20/04 12/30/04 11/23/2004 01/ 03 /2005 OFFICIAL RECORD COPY
NRC STAFF REVIEW OF 2003 ANNUAL STEAM GENERATOR INSERVICE INSPECTION
SUMMARY
REPORT SURRY POWER STATION, UNITS 1 & 2 DOCKET NOS.: 50-280, 50-281 By letter dated February 23, 2004, as supplemented by letter dated November 1, 2004, Virginia Electric and Power Company (the licensee) submitted the Annual Steam Generator Inservice Inspection Summary Report for the 2003 refueling outages at Surry Power Station, Units 1 and 2. As part of its review of this report, the U.S. Nuclear Regulatory Commission (NRC) staff participated in a conference call with the licensee on May 1, 2004, to discuss the steam generator tube inspection activities at Surry, Unit 1.
Each unit has three steam generators. The steam generators at Surry, Units 1 and 2, were replaced in 1981 and 1980, respectively, with Westinghouse-fabricated steam generators.
Each Westinghouse steam generator nominally contains 3,342 thermally treated Alloy 600 tubes. Each tube has a nominal outside diameter of 0.875-inch and a nominal wall thickness of 0.050-inch. These tubes were hydraulically expanded at both ends for the full length of the tubesheet and are supported by a number of stainless steel tube support plates. The U-bends of the tubes installed in Rows 1 through 8 were thermally stress relieved after bending.
In its submittal, the licensee provided the scope, extent, methods, and results of the steam generator tube inspections. Within these inspection results, the licensee described corrective actions (e.g., tube plugging or repair) taken in response to the inspection findings. One item of particular interest to the NRC staff is a pattern of denting on peripheral tubes at the 6th and 7th tube support plates for both units. The licensees inspections of the B steam generators confirm that these dents tend to be located near tube support wedge locations in upper elevations of periphery tubes. The dents tend to be low voltage and are not expected to cause a significant increase in stresses to the tubes. No stress corrosion cracking has been identified at these locations. These signals will continue to be monitored. Data from future inspections should serve as a tool to understanding the apparent denting phenomena.
Based on a review of the licensees submittals, the NRC staff concludes that the licensee has provided the information required by their technical specifications. In addition, the NRC staff concludes that there are no technical issues that warrant follow-up action at this time since the licensees inspections appear to be consistent with the objective of detecting potential tube degradation, and the inspection results obtained appear to be consistent with industry operating experience at similarly designed and operated units.
Enclosure
Surry Power Station, Units 1 & 2 cc:
Ms. Lillian M. Cuoco, Esq.
Senior Counsel Dominion Resources Services, Inc.
Building 475, 5th Floor Rt. 156, Rope Ferry Road 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 Post Office Box 1197 Richmond, Virginia 23218 Dr. Robert B. Stroube, MD, MPH State Health Commissioner Office of the Commissioner Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218 Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Dominion Resources Services, Inc.
Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711 Mr. Jack M. Davis Site Vice President North Anna Power Station Virginia Electric and Power Company Post Office 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