ML20211B329
| ML20211B329 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/19/1999 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20211B326 | List: |
| References | |
| NUDOCS 9908240273 | |
| Download: ML20211B329 (4) | |
Text
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. ROPOSED TECHNICAL SPECIFICATION CHANGES P
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A tube inspection (pursuant to Specification 4.18.5.a.9) shall be performsd 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.
f 3.
Tubes in the following groups may be excluded from the first random sample if all tubes in a group in both steam generators are inspected.
The inspection may be concentrated on those portions of the tubes where imperfections were previously found. No credit will he taken for these tubes in meeting minimum sample size requirements. Where only a portion of the tube is inspected, the remainder of the tube will be subjected to the random inspection.
(1)
Group A-1:
Tubes within one, two or three rows of the open inspection lane.
(2)
Group A-2:
Unplugged tubes with sleeves installed.
(3)
Group A-3:
Tubes in the wedge-shaped group on either side of the lane region (Group A-1) as defined by Figure 4.18.1.
4.
. Tubes with axially-oriented tube end cracks (TEC) which have been left inservice for the previous cycle shall be inspected with a rotating coil eddy current technique in the area of the TEC and characterized in accordance with topical report-BAW-2346P, Rev.0, during all subsequent SG inspection intervals pursuant to 4.18.4.
The results of this examination may be excluded from the first random sample. Tubes with axial TECs identified during previous inspections which meet the criteria to remain in service will not
-be included when calculating the inspection category of the OTSG.
b.
All. tubes which have been repaired using the reroll process will have the new roll area inspected during the inservice inspection.
c.
The second and third. sample inspections during each inservice inspection as required by Table 4.18-2 may be less than a full 3
tube inspection by concentrating the inspection on those areas of the tube sheet array and on those portions of the tubes where tubes with imperfections were previously found.
The results of each sample inspection shall be classified into one of the following three categories:
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 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.
Amendment No. 34,44,46, M6, M4, MO 110k L
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MARKUP OF CURRENT ANO-1 TECHNICAL SPECIFICATIONS (FORINFORMATION ONLY) l 4
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A tube inspection (pursuant to Specification 4.18.5.a.9) shall be parformsd on each selected tube.
If any selected tube does not permit the passage of the eddy current probe for a tube inspectic:a, this shall be recorded and an adjacent tube shall be selected and subjected to a tube inspection.
3.
. Tubes in the following groups may be excluded from the first random sample if all tubes in a group in both steam generators are inspected. The inspection may be concentrated on those portions of the tubes where imperfections were previously found.
No credit will be taken for these tubes in meeting minimim sample size requirements. Where only a portic.
$f the tube is inspected, the remainder of the tube will be subjected to the random inspection.
(1)
Group A-1:
Tubes within one, two or three rows of the open inspection lane.
(2)
Group A-2:
Unplugged tubes with sleeves installed.
(3)
Group A-3:
Tubes in the wedge-shaped group on either side of the lane region (Group A-1) as defined by Figure 4.18.1.
_4.
Tubes with axially-oriented tube end cracks (TECJ which have been left inservice for the previous cycle shall be inspected with a rotatina coil eddy current techniaue in the area of the TEC and characterized in accordance with topical report BAW-2346P, Rev.0, durina all subsecuent SG inspection intervals pursuant to 4.18.4.
The results of this examination may be excluded from the first random sample.
Tubes with axial TECs identified durino previous inspections which meet the criteria to remain in service will not l
be included when calculatino the inspection catecorv of the OTSG.
b.
All tubes which have been repaired using the reroll process will have the new roll area inspected during the inservice inspection.
c.
The second and third sample inspections during each inservice inspection as required by Table 4.18-2 may be less than a full tube inspection by concentrat3ng the inspection on those areas of the tube sheet array and on those portions of the tubes where tubes with imperfections were previously found.
The results of each sample inspection shall be classified into one of the following three categories:
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 total tubes inspected, are defective, or between 5% and 10% of the total tubes inspected are degraded j
tubes.
C-3 More than 10% of the total tubes inspected are degraded tubes or more than 1% of the inspected tubes are defective.
^ Amendment No. M,41,M,M6,M4,-140 110k