ML20070E697
| ML20070E697 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 12/09/1982 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Deyoung R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 8212170349 | |
| Download: ML20070E697 (2) | |
Text
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r, 1 BALTIMORE GAS AND ELECTRIC CHARLES CENTER P.O. BOX 1475. BALTIMORE, MARYLAND 21203 ARTHUR E. LUNDVALL Jn.
ViCE PREseOENT SUPPLY December 9,1982 U.S. Nuclear Regulatory Commission Office of Inspection & Enforcement Washington, DC 20555 ATTENTION:
Mr. Richard C. DeYoung, Director
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit A Docket No. 50-318 Report of Steam Generator Tube Pluaging
REFERENCE:
(a)
Technical Specifications, Calvert Cliffs Unit 2 Gentlemen:
As required by Technical Specification 4.4.5.5, this letter reports the number of tubes plugged on the Calvert Cliffs Unit 2 Steam Generators during the most recent November 1982 Inservice inspection. One (1) tube in each of the two (2) steam generators were found to have defects which exceeded the plugging limit. These tubes were removed from service by plugging each end with mechanical tube plugs.
The eddy current testing performed exceeded the requirements of Calvert Cliffs Unit 2 Technical Specifications. Two (2) tubes were found to be defective, one in each steam generator.
These tubes exceeded the plugging limit of 40% loss of nominal wall i
thickness. The tube numbers are Line 15 Row 136 Quandrant 3 in Steam Generator #21, and Line 46 Row 29 Quandrant 2 in Steam Generator #22. They show tube wall loss of 44% and 59%, repectively. Records show that these tubes have not been inspected by eddy current techniques in the area of the flaws prior to this inspection. Both flaws were small volume, small area flaws. The flaws were not located in the sludge area of the steam generators, nor were they in the area of a tube support.
8212170349 821209 PDR ADOCK 05000 G
d Mr. Richard C. DeYoung December 9,1982 Page 2 Should you have further questions regarding this matter, please do not hesitate to contact us.
Very tru y your
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