ML20209G026

Proposed Tech Spec 4.4.5.4,revising Steam Generator Tube Plugging Criteria

ML20209G026
Person / Time
Site:	Summer
Issue date:	08/15/1986
From:	SOUTH CAROLINA ELECTRIC & GAS CO.
To:
Shared Package
ML19292F871	List: ML20209F996 ML20209G026 ML20209G222 ML20209G228
References
NUDOCS 8609120344
Download: ML20209G026 (1)

Text

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ATTACHMENT I REACTOR COOLANT SYSTEM

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SURVEILLANCE REQUIREMENTS (Continued) 4.4.5.4 Acceptance Criteria

a. As used in this Specification:

1. Imperfection means an exception to the dimensions, finish or contour of a tube from that required by fabrication drawings or specifications. Eddy-current testing indications below 20% of the nominal tube wall thickness, if detectable, may be considered as imperfections.

2. Degradation means a service-induced-cracking, wastage, wear or general corrosion occurring on either inside or outside of a tube.

3. Degraded Tube means a tube containing imperfections greater than or equal to 20% of the nominal wall thickness caused by degradation.

4.  % Degra'dation means the percentage of the tube wall thickness '

affected or removed by degradation.

5. Defect means an imperfection of such severity that it exceeds (

theEIugginglimit. A tube containing a defect is defective.

6. Plugging Limit means the imperfection depth at or beyond which the tube shall be removed from service and is equal to 40% of the nominal tube wall thickness. (UOTE 1)

7. Unserviceable describes the condition of a tube if it leaks or contains a defect large enough to affect its structural integrity in the event of an Operating Basis Earthquake, a loss-of-coolant accident, or a steam line or feedwater line break as specified in 4.4.5.3.c, above.

8. 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.

NOTE 1: This definition does not apply to the area of tubes in the tubesheet region more than 1.60 inches below the top of the tubesheet or, if lower than the top of the tubesheet, the bottom of the roll transition except when the tube does not [

have an intact tube directly above it (one row higher in number, same column).

C SUMER - UNIT 1 3/4 4-14 8609120344 860315 PDR ADOCK 00000395 P PDH

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