ML031410078

Steam Generator Tube Inspection Report

ML031410078
Person / Time
Site:	Surry
Issue date:	05/14/2003
From:	Funderburk C Virginia Electric & Power Co (VEPCO)
To:	Office of Nuclear Reactor Regulation
References
03-345, NL&OS/mm R0
Download: ML031410078 (3)

Text

VIRGINA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 May 14, 2003 Director of Nuclear Reactor Regulation Serial No.: 03-346 United States Nuclear Regulatory Commission NL&OS/mm Ro Washington, DC 20555-0001 Docket No.: 50-280 License No.: DPR-32 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 1 STEAM GENERATOR TUBE INSPECTION REPORT Planned inservice inspection of the Surry Unit 1 "B" steam generator was completed during the Spring 2003 Refueling Outage. In accordance with Surry Power Station Technical Specification 4.19.F.a, this letter provides notification of the number of steam generator tubes that were plugged during the outage.

Steam Generator "B" The following seven (7) tubes were plugged in "B" steam generator as a result of this inspection:

Maximum Measured Through-Wall Location Plugging Attribute Penetration Comments Row 1 Column 9 Wear caused by 39% Preventatively monorail during plugged sludge lancing Row 1 Column 28 Wear caused by 28% Preventatively monorail during plugged sludge lancing Row 1 Column 67 Wear caused by 31% Preventatively monorail during plugged sludge lancing Row 1 Column 86 Wear caused by 41% Wear in excess of monorail during Technical sludge lancing Specifications limit Row 1 Column 34 Dent N/A Preventatively plugged Row 21 Column 76 Signal noise caused N/A Preventatively by permeability plugged variations Row 16 Column 50 Dent N/A Preventatively plugged kcr

Steam Generator "C" During the inspection of "B" steam generator, four (4) row 1 tube locations were identified with indications that resulted from monorail wear caused by sludge lancing operations that were conducted in the Spring of 2000. Row 1 tubes had previously been plugged in Unit 1 "A" steam generator as a result of the same sludge lancing operation. Since "C" steam generator had also been sludge lanced in the spring of 2000, it was determined that "C" steam generator should also be opened and inspected. To bound the area where wear from the monorail could potentially occur, twenty (20) tubes were inspected in "C" Steam generator. Four (4) tubes were preventatively plugged as a result of this inspection. As shown below, these tubes were at the same locations as those identified in "B" steam generator:

Maximum Measured Through-Wall Location Plugging Attribute Penetration Comments Row 1 Column 9 Wear caused by 16% Preventatively monorail during plugged sludge lancing Row 1 Column 28 Wear caused by 30% Preventatively monorail during plugged sludge lancing Row 1 Column 67 Wear caused by 35% Preventatively monorail during plugged sludge lancing Row 1 Column 86 Wear caused by 34% Preventatively monorail during plugged sludge lancing No new commitments are being made as a result of this letter. If you have any questions concerning these results, please contact Mr. Gary Miller at (804) 273-2771.

Very truly yours, C. L. Funderburk, Director Nuclear Licensing and Operations Support

cc: U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, GA 30303-8931 Mr. R. A. Musser NRC Senior Resident Inspector Surry Power Station Mr. C. Gratton NRC Senior Project Manager U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 8G9 Rockville, MD 20852