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Category:Drawing
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[Table view] Category:Letter
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RICHMOND, VIRGIN IA 23261 February.15, 1978:
Mr. Edson G. Case, Acting Director Serial No. 074 Office of Nuclear Reactor Regulation PO&M/DLB:das U. S. Nuclear Regulatory Commission Docket No. 50-281 Washington, D.C. 20555 License No. DPR-37 Attn: Mr. Robert W. Reid, Chief Operating Reactors Branch 4
Dear Mr. Case:
The purpose of this letter is to present the Surry Unit No. 2 steam genera-tor surveillance program for the forthcoming outage which is scheduled to begin on or about March 15, 1978. The program will consist of the following:
- 1. Eddy current testing of U-bends as follows:
- a. Unplugged tubes in all steam generators rows 1-5, columns 1-92 tested *at 100 KHZ using beaded flex probe.
- b. Any tubes which give indications at 100 KHZ will be reprobed at 400 KHZ. .
- 2. Tube gauging will be conducted in the cold legs of all steam genera-tors utilizing probe sizes 0.610" and 0.540'\ Extent of gauging is as indicated on Figure 1 (dashed line). * *
- 3. Tube gauging will be conducted in the hot legs of all steam genera-tors utilizing three different eddy current probe sizes (0.540",
0.610", and 0.650" diameters). Extent of gauging is indicated in Figure 1 (solid line). The 15% strain contour at .11.5 EFPM past closure was utilized as the basis for the boundary.
- 4. Wrapper to shell annulus measurements will be performed in steam gen-erator A.
- 5. Handhole inspections using photographs will be performed to inspect flow slots and determine the extent of hourglassing on the visible tube support plates in all steam generators.
- 6. All tubes which did not pass a .650" probe during the inspection of October 1977 will be tested as well as surrounding tubes for a dis-tance of 2 tubes in all directions. For any surrounding tube which does not pass the .650 11 probe, all of its surrounding tubes for a dis-tance of 2 tubes in all directions will be tested; this process con-tinuing until no further indications are found.
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VIRGINIA ELECTRIC AND POWER COMPANY TO
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Page No. 2
- 7. Preventive plugging based on inspection results.
The plugging program and its associated operating period will be forwarded when the surveillance program data has been evaluated.
Very truly yours, 41dl)?.~4t~
C. M. Stallings Vice President - Power Supply and Production Operations Attachment (Figure 1) cc: Mr. James P. O'Reilly
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