ML20236N995

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Cycle 2A Insp,Aug 1986,Steam Generator (S/G) Insp Results. No Steam Generator Tube Recorded Defects or Degradation
ML20236N995
Person / Time
Site: Sequoyah Tennessee Valley Authority icon.png
Issue date: 08/04/1987
From:
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20236N476 List:
References
NUDOCS 8708120182
Download: ML20236N995 (12)
v • d • e


Text

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l' ENCLOSURE j

SEQUOYAH UNIT 2 CYCLE 2A INSPECTION AUGUST-1986 STEAM GENERATOR (S/G) INSPECTION RESULTS B708120182 070004 PDR ADOCK 05000320 PDR G

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l SEQUOYAH UNIT 2 CYCLE 2A INSPECTION AUGUST 1986 S/G INSPECTION RESULTS Contents Table 1 Inspection Summary Table 2- S/G 1 Inspection Summary-Table 3 S/G 2 Inspection Summary Table 4 S/G 3 Inspection Summary Table 5 Tube Sheet Map of S/G 1 Tubes Examined Table 6 Tube Sheet Map of S/G 2 Tubes Examined Table 7 Tube Sheet Map of S/G 3 Tubes Examined Table 8 Indications Table 9 Tubes Plugged during Cycle 2A Inspection

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TABLE 1 SEQUOYAH UNIT 2 CYCLE 2A INSPECTION

, AUGUST 1986 l

t INSPECTION

SUMMARY

l S/G 1 S/G 2 S/G 3 Total tubes inspected 98 915 912 Tubes recording defects 0 0 0 i (240% wall loss)

Tubes recording degradation 0 0 0 0b20% to < 40% wall loss) I Tubes recording iniperfections 0 2 8

(<20% wall loss)

Tubes recording nonquantifiable % 16 5 3 wall less 1

1 l

TABLE 2 SEQUOYAH UNIT 2 CYCLE 2A INSPECTION AUGUST 1986 S/G 1 INSPECTION

SUMMARY

1 l

ASME Code Exams Number of Tubes Full length general defect exams (Cold Tube End to Hot Tube End) 4 Total ASME Code Exams 4 Non-ASME Code Exams Number of Tubes Special row I U-bend region exams Cold Transition to sixth Tube Support a Plate Hot Leg 89 Apex to sixth Tube Support Plate Hot Leg 5 Total Non-ASME Code exams 94 Total Exams conducted in S/G 1 98  !

Defects Tubes recording defects 0 (240% wall loss)

Tubes recording degradations 0 0120% & < 40% wall loss)

Tubes recording imperfections 0 l

(<20% wall loss) J Tubes recording nonquantifiable % wall 16 loss indications a

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I TABLE 3 _,

SEQUOYAH UNIT 2 CYCLE 2A INSPECTION AUGUST 1986 S/G 2 INSPECTION

SUMMARY

ASME Code Exams Number of-Tubes Full length general defect exams 4 (Cold Tube End to Hot Tube End) 527 l

Total ASME Code Exams 527 l

l l Non-ASME Code Exams Number of Tubes' l Special row 1 & 2 U-bend region exams Cold Transition to sixth Tube Support Plate Hot Leg 188 Aper to sixth Tube Support Plate Hot Leg 0 General Defect Exam Noncode Extent 200 Total Non-ASME Code exams 388 Total Exams conducted in S/G 2 _915 Defects Tubes recording defects 0 (240% wall loss)

Tubes recording degradations 0 (220% & 4 40% wall loss)

Tubes recording imperfections 2 (420% wall loss)

Tubes recording nonquantifiable % wall 5  :

loss indications

TABLE 4 SEQUOYAH UNIT 2 CYCLE'2A INSPECTION AUGUST 1986 S/G 3 INSPECTION

SUMMARY

ASME Code Exams Number of Tubes Full length general defect. exams

.(Cold Tube End to Hot Tube End) 528 Total ASME' Code Exams 528 l

Non-ASME Code Exams Number of Tubes Special row 1 & 2 U-bend region exams Cold Transition to sixth Tube Support Plate Hot Leg 154 Apex to sixth Tube Support Plate Hot Leg 33 General Defect Exam Noncode Extent 197 Total Non-ASME Code exams 384 Total Etams conducted in S/G 3 912 Defects i

Tubes recording defects 0 (240% wall loss)

Tubes recording degradations 0 (120% & < 40" wall loss)

Tubes recording imperfections 8

(<20% wall loss)

Tubes recording nonquantifiable % wall 3 loss indications

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TABLE 8 SEQUOYAH UNIT 2 j CYCLE 2A INSPECTION  ;

AUGUST 1986 l

INDICATIONS Percent

! S/G ROW Column Indication Wall Loss Location j 1 1 7 IST (NOTE 1) U-bend 1 1 12 IST (NOTE 1) U-bend i 1 1 26 IPT (NOTE 1) U-bend f 1 1 29 IPT (NOTE 1) U-bend l 1 1 3f IPT (NOTE 1) U-bend l 1 1 59 IPT (NOTE 1) U-bend l 1 1 61 IPT (NOTE 1) U-bend  ;

l 1 1 62 IST (NOTE 1) U-bend l 1 1 63 IST (NOTE 1) U-bend 1 1 66 IST (NOTE 1) U-bend 1 1 67 IST (NOTE 1) U-bend 1 1 68 IST (NOTE 1) U-bend 1 1 69 IST (NOTE 1) U-bend 1 1 88 IST (NOTE 1) U-bend 1 1 89 IST (NOTE 1) U-bend 1 1 91 IST (NOTE 1) U-bend 2 1 49 IPT (NOTC 1) HTR+00.0 2 1 50 IST (NOTE 1) HTR+00.0 2 1 87 IST (NOTE 1) HTR+00.0 2 1 88 IPT (NOTE 1) HTR+00.0 2 1 90 1PT (NOTE 1) HTR+00.0 2 12 2 -

17 H5+22.6 2 17 91 -

12 CTS +16.4 3 1 1 IST (NOTE 1) HTR+00.0 3 1 13 IST (NOTE 1) HTR+00.0 3 1 29 IST (NOTE 1) HTR+00.0 3 15 91 -

1 H4+39.7 3 26 53 -

17 C6+25.9 3 26 57 -

1 C1+15.6 3 29 64 -

18 C5+31.1 3 34 53 -

12 C6+40.0 3 40 68 -

11 H4+25.1 3 45 27 -

15 H2+31.3 3 46 52 -

15 H6+44.9 NOTE 1: IST's and IPT's are nonquantifiable percent wall loss indications detected utilizing the Combustion Engineering row I probe.

l 3

- - i

< - - ,',. s TABLE 8 SEQUOYAH UNIT 2 CYCLE 2A INSPECTION AUGUST 1986 INDICATION (CONT.)

DESCRIPTION OF INDICATIONS IST A suspected degradation of nonquantifiable percent wall loss has.

been detected. Data was collected utilizing a Combustion Engineering row 1 probe. ,

IPT A degradation of nonquantifiable percent wall loss has been detected. Data was collected utilizing a Combustion Engineering row 1 probe.

LOCATION ABBREVIATIONS Hot Tube End HTE.

Hot Leg. Tube Sheet (upper surface) HTS First Hot Leg Support Plate H1 Second Hot Leg Support Plate H2 Third Hot Leg Support Plate H3 Fourth Hot Leg Support Plate H4 Fifth Hot Leg Support Plate H5 Sixth Hot Leg Support Plate

  • H6 Seventh Hot Leg Support Plate H7 Hot U-bend Transition HTR APEX of U-bend APEX Cold U-bend Transition CTR Seventh Cold Leg Support Plate C7 Sixth Cold Leg Support P3;*e C6 Fifth Cold Leg Support P. ace C5 Fourth Cold Les Support Plate C4 Third Cold Leg Support Plate C3 Second Cold Leg Support Plate C2-First Cold Leg Support Plate C1 Cold Leg Tube Sheet-(upper surface) CTS Cold Tube End CTE l

2 1

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l TABLE 9 SEQUOYAH UNIT 2 i

CYCLE 2A INSPECTION I AUGUST 1986 1

4 1

i ,

TUBES PLUGGED DURING l CYCLE 2A INSPECTION l \

l 3/G R0W Column

]

i i 1 7 l 1 1 12 )

1 1 26 l l 1 1 29 )

1 1 36 .i 2 1 59 1 1 61 1 1 62 1 1 1 63 1 1 66 1 1 67  ;

1 1 68 '

1 1 69 i 1 1 88 1 1 89 ,

l 1 1 91 2 1 49 2 1 50 2 1 87 l 2 1 BB 2 1 90  :

3 1 1 j 3 1 13 3 1 29

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