ML20012D678

Proposed Tech Specs to Allow Use of B & W Kinetic Sleeving Process for Steam Generator Tube Repair

ML20012D678
Person / Time
Site:	McGuire, Mcguire
Issue date:	03/19/1990
From:	DUKE POWER CO.
To:
Shared Package
ML20012D675	List: ML20012D674 ML20012D678
References
NUDOCS 9003280225
Download: ML20012D678 (1)

Text

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, ,4 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk March 19, 1990 Attachment Bases 3/4.4.5, Steam Generators, Insert Item At The B&W process (or method) equivalent to the inspection method described in Topical Report BAW-2045(P)-A will be used. Inservice inspection of steam generator sleeves is also required to ensure RCS integrity. Because the sleeves introduce changes in the wall thickness and diameter, they reduce the sensitivity of eddy current testing, therefore, special inspection-methods must be used. .A method is described in Topical Report BAW-2045(P)-A' with supporting validation' data that demonstrates the inspectability of the sleeve and underlying tube. As required by NRC for licensees authorized to use this repair process, McGuire commits to validate the-adequacy of any system that is used for periodic inservice inspections of the sleeves, and will evaluate and impicment testing methods as better methods are developed and validated for commercial use, as deemed appropriate by Duke Power Company.

Bases 3/4.4.5, Steam Generators. Insert Item B:

Defective steam generator tubes can be repaired by the installation of sleeves which span the area of degradation, and serve as a replacement pressure boundary for the degraded portion of the tube, allowing the tube to remain in service.

Bases, 3/4.4.5, Steam Generators, Insert Item C:

If a tube is sleeved due to degradation in the F* distance, then any defects in the tube below the sleeve will remain in service without repair.

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