B13221, Proposed Tech Specs Re Inservice Insp of Steam Generator Tubes & Acceptance Criteria for Tubes

Proposed Tech Specs Re Inservice Insp of Steam Generator Tubes & Acceptance Criteria for Tubes

ML20245L249
Person / Time
Site:	Millstone, Haddam Neck, 05000000
Issue date:	06/29/1989
From:	CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20245L245	List: B13221, Proposed Tech Specs Re Inservice Insp of Steam Generator Tubes & Acceptance Criteria for Tubes ML20245L240
References
B13221, NUDOCS 8907050422
Download: ML20245L249 (3)

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g)- 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 ' 0perating Basis earthquake, a loss-of-coolant accident, or a steam line or feedwater line break as specified in Specification 4.10.1.C.3.

h) 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; or an inspection from the point of entry (Hot Leg or Cold Leg Side) completely around the U-bend to the opposite tube end.

2. The Steam Generator may be returned.to service after completing the corresponding actions (plug or sleeve

• all tubes exceeding the plugging' limit and plug all defective sleeves) required by Table 4.10.I-2.

E. Following each inservice inspection of steam generator tubes, the number of tubes plugged or sleeved in each steam generator shall be reported in accordance with specification 6.9.

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-Y e907050422 e90629 3 DR ADOCK 0500

• Tube sleeving shall be performed in accordance with the Connecticut ,

Yankee Steam Generator Sleeving Report, Revision 1, transmitted by letter '

dated January 7, 1986.

. 4-21d

Docket Nos. 50-423 B13111 Attachment II Millstone Unit No. 3 Proposed Revision to Technical Specifications l

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i June 1989 l

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1 s REACTOR COOLANT SYSTEM STEAM GENERATOR SURVEILLANCE RE0VIREMENTS (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) Dearaded Tube means a tube containing imperfections greater than or equal to 20% of the nominal wall thickness caused by degradation;

4)  % Degradation means the percentage of the tube wall thickness affected or removed by degradation;

5) Defect means an imperfection of such severity that it exceeds the plugging limit. A tube containing a defect is defective;

6) Pluaaina 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;

7) Unserviceable describes the condition of a tube if it leaks or contains a defect large enough to affect its structural integ-rity in the event of an Operating Basis Earthquake, a loss-of-coolant accident, or a steam line or feedwater line break as specified in Specification 4.4.5.3c., 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; or an inspection from the point of entry (Hot Leg or Cold Leg Side) completely around the U-bend to the opposite tube end.

MILLSTONE - UNIT 3 3/4 4-17 f

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