ML20196E219

Proposed Tech Specs,Allowing Repair of Defective SG Tubes with leak-limiting Alloy 800 Repair Sleeves

ML20196E219
Person / Time
Site:	Calvert Cliffs
Issue date:	11/30/1998
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20138L913	List: ML20196E210 ML20196E219 ML20196E221
References
NUDOCS 9812030062
Download: ML20196E219 (4)

Text

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ATTACHMENT (3) l a

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I MARKED-UP TECHNICAL SPECIFICATION PAGES 5.0-18 5.0-19 l

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9812030062 981130 PDR ADOCK 05000317 -

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Baltimore Gas & Electric Company Docket Nos. 50-317 and 50-318 j November 30,1998 j i

Prsgrams and Manuals 5.5 5.5 Programs and Manuals '

5.  % Deoradation means the percentage of the tube wall thickness affected or removed by degradation.

6. Defect means an imperfection of such severity that it exceeds the plugging or repair limit. A tube containing ,

a defect is defective. Any tube which does not permit I the passage of the eddy-current inspection probe shall )

be deemed a defective tube.

7. pluooino or Repair limit means the imperfection depth at or beyond which the tube shall be removed from service by plugging, or repaired by sleeving in the affected area because it may become unserviceable prior to.the next inspection. The plugging or repair limit imperfection depths are specified in percentage of nominal wall thickness as follows:

1. original tube wall 40% l

11. Westinghouse laser welded sleeve wall 40% 1

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iii. #BB-Combustion Engineering leak tight A" sleeve wall 28%  !

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b erviceable describes the condition of a tube if it  !

leaks or contains a defect large enough to affect its I structural integrity in the event of an Operating Basis Earthquake, a loss-of-conlant accident, or a steam line or feedwater line b eak as specified in 5.5.9.c.3 above.

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9. Tube Inspection means an inspection of the steam generator tube from the point of entry (hot leg side) completely around the U-bend to the top support of the cold leg.

l CALVERT CLIFFS - UNIT 1 5.0-18 Amendment No l CALVERT CLIFFS - UNIT 2 Amendment No i

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Programs and Manuals ,

5.5 1 5.5 Programs and Manuals

10. Tube Repair refers to s process that reestablishes tube serviceability. Acceptable tube repairs will be performed by the following processes

. i. Westinghouse Laser Welded Sleeving as described in  !

the proprietary Westinghouse Reports WCAP-13698, '

Revision 2 " Laser Welded Sleeves for 3/4 Inch Diameter Tube Feedring-Type and Westinghouse

, Preheater Steam Generators, Generic Sleeving i

Report." April 1995; and WCAP-14469, " Specific Application of Laser Welded Sleeving for the Calvert Cliffs Power Plant Steam Generators,"

November 1995. .

ii. ABB-Combusting Engineering Leak Tight Sleeving as

described in the proprietary ABB-Combustion Engineering Report CEN-630-P, Revision 01, " Repair of3/4"0.D.SteamGeneratorTubesUsingLeakTight Sleeves," August 1996. A post-weld heat treatment during installation will be perfonned.

ube repair includes the removal of plugs that were previously installed as a corrective or preventive measure. A tube inspection per 5.5.9.d.9 is required prior to returning previously plugged tubes to service.

e. Surveillance Completion - The Steam Generator Tube Surveillance Program is met after completing the corresponding actions (plug or repair all tubes exceeding the plugging limit and all tubes containing through-wall cracks) required by Tables 5.5.9-2 and 5.5.9-3.

i CALVERT CLIFFS - UNIT 1 5.0-19 Amendment No.

CALVERT CLIFFS - UNIT 2 Amendment No i

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Insert A:

iv. ABB-Combustion Engineering Alloy 800 leak-limiting 35%

sleeve wall Insert B:

111. ABB-Combustion Engineering Alloy 800 leak-limiting sleeving as described in the Proprietary ABB Combustion Engineering Report CEN-633-P.

Revision 03-P, " Steam Generator Tube Repair For Combustion Engineering Designed Plants with 3/4 048 Inch Wall Inconel 600 Tubes Using Leak Limiting Alloy 800 Sleeves," October 1998.

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