ML17263B039
| ML17263B039 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/18/1995 |
| From: | Davison M, Saporito M ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263B038 | List: |
| References | |
| NUDOCS 9505050113 | |
| Download: ML17263B039 (4) | |
Text
ROCHESTER GAS AND ELECTRIC CORPORATION S9 East Avenue, Rochester, NY 14649 MATERIALSENGINEERING AI'6) INSPECTION SERVICES
SUMMARY
EXAMINATIONREPORT FOR THE 1995 STEAM GENERATOR EDDY CURRENT INSPECTION AT R.E. GINNA NUCLEAR POWER STATION REVISION 0 April 18, 1995
/'REPARED BY:
Michael J. D isou Engineering assistant - NDE Materials Eugiueeriug aud Inspection Services APPROVED BY:
Michael J. Sapori o Manager Materials Eugiueeriug aud inspection Services DATE:
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9505050113 tst50424 PDR ADOCK 05000244
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"Pursuant to Section 11, Paragraphs 2.8.2 and 2.8.4 of Appendix B of the Ginna Station Quality Assurance Manual, the following information is submitted in regard to the number of tubes requiring repair in each steam generator:
"A" S G
II8 lt S
G Number of Tubes Plugged Number of Tubes Sleeved 13 75 29 91 Total Repairs 88 120 Of the 13 tubes plugged in the Hot Leg of "A" Steam Generator 10 were CE mechanical plugs and 3 were BGW explosive sleeve plugs (Parent tube defects in the sleeve upper weld zone were discovered during baseline eddy current examination of Row 31, Col 45; Row 32, Col 47; and Row 22, Col 67).
In the "B" Steam Generator Hot Leg, 11 CE mechanical plugs were installed and 10 CE welded plugs were installed.
A total of 8 BGW explosive sleeve plugs were installed.
2 BQW brazed sleeves (Row 12, Col 35 and Row 31, Col 54) were plugged for PWSCC indications at the lower joint; 1 brazed sleeve (Row 13, Col 46) was plugged due to the absence of a braze in the upper expansion; 2 sleeved tubes (Row 1, Col 54 and Row 1, Col 57) were plugged due to the sleeve causing obstruction of passage of an eddy current probe of sufficient fillfactor through the unsleeved portion of the hot leg length of tubing; and 3 newly installed BGW kinetically welded tubesheet sleeves (Row 3, Col 16; Row 5, Col 16 and Row 8, Col 17) were plugged as a result of discovery of parent tube defects in the sleeve upper weld zone during baseline eddy current examinations.
All cold leg repairs were CE mechanical plugs (13 in "A" S/G and 29 in "B" S/G).
The breakdown of the number of repairs required by defect mechanism is listed below:
II All S
G IIBII S G
Roll Transition PWSCC Crevice IGA/SCC Obstructed Sleeves PWSCC in BQW Brazed Sleeves Unbrazed B&W Sleeves Unwelded/Unfused CE Sleeves "Blowhole" in CE Sleeve 60
- 35
- 32
- 80 *
- Includes tubes with both PWSCC and IGA/SCC Maps showing. the location of all tubes requiring repair as a result of eddy current examination are attached.
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Glnna NUclear Power Stathn SIG - A 04/07/95 Inlet
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8 15 11S I TUBES TO BE REPAIRED QSMAR OUTAGE 57 Rochester Gas 8 Electttc Corp.
Ginna Nuclear Power Station S/G - 8 04/07/95 Inlet 71 7$