ML19093B069
| ML19093B069 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 04/26/1978 |
| From: | Stallings C Virginia Electric & Power Co (VEPCO) |
| To: | Case E, Reid R Office of Nuclear Reactor Regulation |
| References | |
| Download: ML19093B069 (3) | |
Text
VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND,VIRGINIA 23261 April 26 3 1978
- Mr. Edson G. Case, Acting Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Attention:
Mr. Robert W. Reid, Chief Operating Reactors Branch 4
Dear Mr. Case:
Serial No. 234 PO&M/DLB:das Docket No. 50-280 License No. DPR-32 REGULATORY DOCKET filE COPY The purpose of this letter is to present the Surry Unit No. 1 steam generator surveillance program for the outage which began on April 22, 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 1-94 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 generators utilizing probe sizes 0.610 11 and 0.540".
Eitent of gauging is as in-
. dicateci on Figure 1 (dashed line).
- 3.
Tube gauging will be conducted in the hot legs of all steam generators utilizing three different eddy current probe sizes (0.540", 0.61011, 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 genera-tor C.
- 5.
iiandhole 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 November 1977 will be tested as well as surrounding tubes for a distance of 2 tubes in all directions.
For any surrounding tube which does not pass the
- 650" probe, all of its surrounding tubes for a distance of 2 tubes in all directions will be tested; this process continuing until no further indications are found.
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e VIRGINIA ELECTRIC AND POWER COMPANY TO Mr. Edson G. Case 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.
Attachment (Figure 1).
cc:
Mr. James P. O'Reilly Q
C r
- Stallings Vice Prdsident ~ Power tu ly and iroduction Operatl.o s
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