ML20077P371

Proposed Tech Specs Adding Definition of Accessible Tube to Section 4.4.5.1.4 Acceptance Criteria & Clarifying Action for Insp Results Into Category C-3 of Table 4.4-6

ML20077P371
Person / Time
Site:	Millstone
Issue date:	09/30/1983
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20077P355	List: B10875, Application for Amend to License DPR-65,changing Tech Specs to Add Definition of Accessible Tube to Section 4.4.5.1.4 Acceptance Criteria & to Clarify Action for Insp Results Into Category C-3 of Table 4.4-6 ML20077P371
References
TAC-52339, NUDOCS 8309130355
Download: ML20077P371 (5)

Text

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Docket No. 50-336 Attachment 1 Millstone Nuclear Power Station, Unit No. 2 Proposed Revisions to Technical Specifications Steam Generator Inspections J

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l September,1983 l-

-*i 830913 PDR'A f'0 03 6 PDR P

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m REACTOR COOLANT SYSTEM' SURVEILLANCE REQUIREMENTS (Continued) 4.4 5.1.4- LAcceptance Criteria

. a.1- .' 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 mean a tube containing imperfections & 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'or sleeve _ containing a defect is defective.

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6. Plumning Limit .means the imperfection depth at or beyond which the tube or sleeve shall be repaired because it may become

' unserviceable prior to the next inspection and is equal to 40% of the nominal tube or sleeve wall thickness.

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.I.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.

9.- Accessible tubes refers to tubes'in the steam generator which are readily inspectable by eddy current probe mechanical positioning

' equipment. A tube that is temporarily blocked to the positioning equipment or was omitted from the inspection pattern may be classified as inaccessible in accordance with the provisions of

' Action C-3 of Table 4.4-6.

b. The steam generator shall be determined OPERABLE after completing the corresponding actions (plug or' sleeve ali tubes exceeding the plugging limit and plug all defective sleeves) required by Table 4.4-6.

MILLSTONE - UNIT 2 3/4 4-7a

TABLE 4.4-5 25 MINIMUM NUMBER OF STEAM GENERATORS TO BE

(( - INSPECTED DURING INSERVICE INSPECTION-1 c$ ,'

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j, Preservice Inspection Yes 5

--4 i na No. of Steam Generators per Unit Two 1

First Inservice Inspection One Second & Subsequent Inservice Inspections One l

l ,, Table Notation:

4 is 1 ,, 1. The inservice inspection may be limited to one steam generator on a rotating sc..edule

, 2, encompassing 3 N % of the. tubes (where N is the number. of steam generators in the plant)-

i n if the results of the first.or previous inspections indicate that all steam generators are performing in a like manner. Note that under some circumstances, the operating con-

, ditions in one or more steam generators may be found to be more severe than those in other steam generators. Under such circumstances the sample sequence shall be modified

to inspect the mast severe conditions.

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• TABLE 4.4 6 r-U m

- STEAM CENERATOR TUDE INSPECTION a

e IST SAMI'LE INSrECTION 2ND SAMPLE INSPECilON 3nD SAMPLE INS 8'ECTION C

f3 Sample Site sacsult Action nequitert Result Action llequircef flesult Action Required 4 .

to A minimum of C-1

• None .N/A N/A" N/A N/A S Tubes per --

S. G.

C -2 sepair defective C-t , None N/A N/A-d one a es sepair defective C-I None C-2 b a inspec C-2 in_this S.C. sepair detective tubes in this S.C. Perform action for R

h C-3 C-3 result of first sample h Perform action for 0

C-3 C-3 result of first N/A N/A sample C-3 Inspect a!! accessible All Oll'er

, tubes in this S. G., S. G.s are None N/A N/A l .

rer. air defective tubes C-t * .

? and inspect 25 tubes in each other S.G.* 60*C I* G 5 Perform action for N/A N/A '

See Note 1. C-2 but no C-2 tesult of second aililitional sample  :

Prompt notification S. G. are to NRC pursuant C-3 to specification Aelilitional Inspect all accessible l G.9.1 . S. G. is C-3 tubes in each S.G . E

. and repair defective .

. tubes'. Prompt N/A N/A notification to NRC

• pursua.it to Specification 6.9.1.

See Note 1. ,

Wwn N is flee nuenic of simn palon h me unit, and n b tb & of stearn paws Wed

• S=3 % 'I"'i'"I an inspect'on n

• Repair of defective tubes shall be limited to plugging with the exception of those tohes which may be sleeved. Tubes with defective sleeves shall be plugged. . f 1

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Table 4.4-6 Table Notation

-1.- l Tubes required to be inspected pursuant to Action C-3 which are inaccessible but located in areas where imperfections were found during the most recent inspection, shall be inspected or repaired. Inaccessible tubes located in areas where experience has indicated no problems exist may be excluded from the inspection pattem performed pursuant to Action C-3 provided that no more than 0.5 percent of all tubes in the steam generator fallinto this category.

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