ML20028E840
| ML20028E840 | |
| Person / Time | |
|---|---|
| Site: | Mcguire |
| Issue date: | 01/18/1983 |
| From: | Tucker H DUKE POWER CO. |
| To: | Adensam E, Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8301280232 | |
| Download: ML20028E840 (3) | |
Text
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DUKE PowEn GOMPANY P.O.190X 33180 CitAltLOTTE, N.C. 2824P II AL 15. TUCHER TELEPHONE viea enresonwr (704) 37tF4534 January 18, 1983 vun=e - -
Mr. liarold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Coomission Washington, D. C. 20555 Attention:
Ms. E. G. Adensam, Chief Licensing Branch No. 4 Re: McGuire Nuclear Station, Unit 2 Docket No. 50-370 Preservice Examination of Steam Generators
Dear Mr. Denton:
Please find attached the summary for the preservice examination of the McGuire Nuclear Station Unit 2 steam generators. This is submitted in response to a request by Robert L. Baer in a letter to W. O. Parker, Jr. dated October 22, 1979.
Please advise us if there are any questions regarding this matter.
Very trulj yours, fh IIal B. Tucker WIN /php Attachment cc:
Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region Il 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Senior Resident Inspector McGuire Nuclear Station go l
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8301280232 830110 PDR ADOCK 05000370 PDR A
Duks Pow:r Company Summary Report of the Preservice Examination of McGuire Nuclear Station Unit 2 Steam Generators Three percent of the Inconel tubes in each of the four steam generators at McGuire Unit 2 were examined per NRC Regulatory Guide 1.83, Rev.1 using eddy current techniques.
The tubing examinations were performed by technicians qualified to Level I, under direct supervision of personnel qualified to Level II of SNT-TC-1A, Supplement E, 1968 Edition as required in C.2.H of the Regulatory Guide. The equipment used conforms to the requirements of C.2.B, E, F, and G of the guide.
A dimension check was performed on the calibration standards prior to use, and the suitability of the standards including the separation of defects was demon-i strated during calibration for the tubing examination.
The data were analyzed by personnel qualified to Level 11 of SNT-TC-1A, Supplement E, 1968 Edition as required in C.2.H of the Regulatory Guide. shows a listing of all recorded indications. All indications are recorded on the raw data sheets.
Indications which are 1 20 percent of the tube wall thickness are transferred to the final report forms. The results of these examinations revealed no inoications > 20 percent of the tube wall thich-ness in any of the steam generators.
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e EDDY CURRENT EXAMINATION
SUMMARY
- Type of "A"
"B" "C"
"D" Total Number Indication UBSG UBSG UBSG UBSG of Tubes Small Ding 0
3 1
0 4
Medium Ding 1
0 0
0 1
Large Dina 0
0 0
0 0
Extra Large Ding 1
0 0
9 1
ID <20%
2 1
0 0
3 ID >20%<40%
0 0
0 0
0 ID >40%
0 0
0 0
0 OD <20%
0 0
0 0
0 OD >20%<40%
0 0
0 0
0 OD >40%
0 0
0 0
0 Chatter 0
0 0
1 1
Permeability 4
8 2
6 20 Small ding 0-2 volts, peak to peak Medium ding 2-4 volts, peak to peak Large ding 4-8 volts, peak to peak Extra large ding
>8 volts, peak to peak The definition of dings related only to the amplitude of the signal on the oscilloscope. No reliable correlation between ding signal amplitude and diameter reductions has been made.