ML20140C036

Proposed Change to Tech Spec Section 3/4.4.5, Steam Generators, Requirement 4.4.5.2,Item b.1,clarifying Inservice Insp Criteria Re Repair of Steam Generator Tubes as Alternate to Tube Plugging

ML20140C036
Person / Time
Site:	Summer
Issue date:	03/18/1986
From:	SOUTH CAROLINA ELECTRIC & GAS CO.
To:
Shared Package
ML20140C033	List: ML20140C027 ML20140C036
References
NUDOCS 8603250096
Download: ML20140C036 (1)

Text

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ATTACHMENT I REACTOR COOLANT SYSTEM -

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SURVEILLANCE REQUIREMENTS (Continued) l

1. All nonplugged tubes that previously had detectable wal1~

penetrations greater than 2Ggg that were not repaired.

2. Tubes in those areas where experience has indicated potential problems.

3. A tube inspection (pursuant to Specification 4.4.5.4.a.8) shall  ;

be performed on each selected tube. If any selected tube'does not permit the passage of the eddy current probe for a tube inspection, this .shall be recorded and an adjacent tube shall

- be selected and subjected to a tube inspection.

c. The tubes selected as the second and third samples (if required by '

Table 4.4-2) during each inservice inspection may be subjected to a partial tube inspection provided:

1. The tubes selected for these samples include the tubes from those areas of the tube sheet array where tubes with imperfections were previously found.

2. The inspections include those portions of the tubes where imperfections were previously found. !k ,i The results of each sample . inspection shall be classified into one of the following three categories:

i Category ' Inspection Results C-1 Less than 5% of the total tubes inspected are degraded tubes and none of the inspected tubes are defective.

C-2 One or more tubes, but not more than 1% of the i

total tubes inspected are defective, or between

, 5% and 10% of the total tubes inspected are degraded tubes.

C-3 More than 10% of the total tubes inspected are

. degraded tubes or more than 1% of the inspected tubes are defective.

Note: In all inspections, previously degraded tubes must exhibit significant (greater than 10%) further wall penetrations to be included in the above percentage calculations.

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