ML20087D362

Sqn,Unit 2 Cycle 6 Insp SG Tubing Insp Results.

ML20087D362
Person / Time
Site:	Sequoyah
Issue date:	08/07/1995
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20087D361	List: ML20087D359 ML20087D362
References
NUDOCS 9508100298
Download: ML20087D362 (18)

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4 ENCLOSURE'  ;

SEQUOYAH NUCLEAR PLANT UNIT 2 ~

CYCLE 6 INSPECTION .

. AUGUST 1994 STEAM GENERATOR TUBING INSPECTION RESULTS -

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-SEQUOYAH NUCLEAR PLANT UNIT 1 CYCLE 6 INSPECTION AUGUST 94 i

TABLE OF CONTENTS Table 1 Inspection Summary Table 2.1 SG 1 Inspection Table 2.2 SG 2 Inspection Table 2.3 SG 3 Inspection Table 2.4 SG~4 Inspection Table 3.1 SG 1 List of Indications and Tubes Plugged Table 3.2 SG 2 List of Indications and Tubes Plugged Table 3.3 SG 3 List' of Indications and Tubes Plugged Table 3.4 'SG 4 List of Indications and Tubes Plugged Table 4 Nomenclature i

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SEQUOYAH NUCLEAR PLANT UNIT 2 l CYCLE 6 INSPECTION i AUGUST 1994 l l

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l TABLE 1 INSPECTION

SUMMARY

' EDDY CURRENT'(Tube Exams) SG 1 SG 2 SG 3 SG 4 Full length bobbin 3377 3363 3370 3379' i Support Plate RPC 33 27 27 27 l Free-span RPC 5 4 3 11  !

Top-of-Tubesheet RPC 1530 3363 2125 1517 U-Bend RPC 187 188 183 188 Total Exam Completed 5132 6945 5708 5122 j Total Tubes Examined 3377 3363 3370 3379 INDICATIONS (Tubes) SG 1 SG'2 EG_1 SG 4  !

Defects (>= 40% wall loss) 0 PWSCC HTS 0 13 3 ODSCC TSP O O 5 2 AVB Wear 0 3 0 0 Cold Leg Wastage 0 0 2 0 PWSCC U-Bend- 14 22 9 0 OD Indications 0 1 0 0 Degradation (>= 20% and < 40% wall loss)  !

ODSCC TSP O 1 4 17 )

AVB Wear 10 16 3 3 Cold Leg Wastage 2 10 7 3 OD Indications 0 0 1 11 MFG. Flaw 4 0 1 0 ODSCC HTS 0 1 6 0 Imperfections (< 20% wall loss)

AVB Wear 2 6 1 4 Cold Leg Wastage 1 5 2 5 OD Indications 0 0 0 3 MFG. Flaws 3 2 1 'O ODSCC HTS 0 0 1 2 PLUGGING STATUS Previously plugged tubes 11 25 18 9

' Plugged Cycle 7 by Damage Mechanism PWSCC HTS 0 13 3 0 ODSCC TSP O O 5 2 PWSCC U-Bend 14 22 9 0 AVB Wear 0 3 0 0 Cold Leg Wastage 0 0 3 0 OD Indication 0 1 0 0-Total Plugged Cycle 7 14 39 20 2 TOTAL TUBES PRESENTLY PLUGGEQ 25 64 38 11

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. :SEQUOYAH NUCLEAR PLANT' UNIT 2 C1'CLE 6 INSPECTION AUGUST 1994 TABLE 2.1 STEAM GENERATOR INSPECTION SG 1

. Exam Extent Probe Tvoe Tubes' i

GENERAL' DEFECT EXAMS i HTE-CTE Bobbin Coil 3377

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l SPECIALTY EXAMS Hot Leg Top of Tubesheet RPC 1530~

Support Plate Intersection RPC 33 Free-span RPC -5 U-Bend RPC 187 TOTAL TUBES EXAMINED 3377 r

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SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION AUGUST 1994 TABLE 2.2 -l i

STEAM GENERATOR INSPECTION SG 2 .

Exam Extent Probe Type Tubes GENERAL DEFECT EXAMS HTE-CTE Bobbin Coil 3363 SPECIALTY EXAMS Hot Leg Top of Tubesheet RPC- 3363 Support Plate Intersection RPC 27 i Free-span RPC 4  :

U-Bend RPC 188 TOTAL TUBES EXAMINED 3363 l

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Exam Extent Probe Tvoe Tubes GENERAL DEFECT EXAMS .

HTE-CTE Bobbin Coil -3370 SPECIALTY EXAMS Hot Top of Tubesheet RPC 2125 Support Plate Intersection RPC 27 Free-span RPC 3 U-Bend RPC 183 TOTAL TUBES EXAMINED 3370 i

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SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION

[ AUGUST 1994 )

TABLE 2.4 STEAM GENERATOR INSPECTION SG 4

~ Exam Extent Probe Tvoe. Tubes-GENERAL DEFECT EXAMS HTE-CTE Bobbin Coil 3379 1

SPECIALTY EXAMS Hot Top of Tubesheet RPC 1517 Support Plate Intersection RPC 27 Free-span .RPC 11-U-Bend RPC 188 TOTAL TUBES EXAMINED 3379 1

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- SEQUOYAH NUCLEAR PLANT  ;

UNIT 2 l CYCLE 6 INSPECTION AUGUSP 1994 l l

l TABLE 3.1

, LIST OF INDICATIONS AND TUBES PLUGGED SG 1 Boy Col Location  % Characterization Resolution i Initial Sample 1 16 H07+ 7.11 SAI U-Bend PWSCC Plug Tube 1 26 H07+ 7.04 SAI U-Bend PWSCC Plug Tube 1 36 H07+ 2.87 SAI U-Bend PWSCC Plug Tube 1 38 H07+ 2.79 SAI U-Bend PWSCC Plug Tube 1 45 H07+ 6.84 SAI U-Bend PWSCC Plug Tube 1 55 H07+ 2.89 SAI U-Bend PWSCC Plug Tube 1 61 H07+ 2.81 SAI U-Bend PWSCC Plug Tube 1 72 H07+ 2.95 SAI U-Bend PWSCC Plug Tube 1 74 H07+ 5.62 SCI U-Bend PWSCC Plug Tube H07+ 5.98 SCI U-Bend PWSCC H07+ 7.19 SCI U-Bend PWSCC 1 85 H074 3.03 SAI U-Bend PWSCC Plug Tube H07+ 5.33 SCI U-Bend PWSCC H07+ 5.00 SCI U-Bend PWSCC 1 87 H07+ 2.80 SAI U-Bend PWSCC Plug Tube 1 88 H07+ 3.30 SAI U-Bend PWSCC Plug Tube H07+ 5.31 SCI U-Bend PWSCC 1 90 H07+ 3.00 SAI U-Bend PWSCC Plug Tube 1 92 H07+ 7.09 SAI U-Bend PWSCC Plug Tube 12 24 HTS +38.39 <40 MFG. Flaw (1) 19 38 AV2+ 0.00 29 AVB Wear (1) 21 55 HTS +37.77 <40 MFG. Flaw (1) 21 66 H02+47.33 <40 MFG. Flaw (1) 25 10 CTS + 8.76 11 MFG. Flaw (2) 26 52 H02+35.42 20 MFG. Flaw (1) 27 31 AV2+ 0.00 22 AVB Wear (1)

AV3+ 0.00 22 AVB Wear (1) 29 63 AV2+ 0.00 24 AVB Wear (1)

AV3+ 0.00 38 AVB Wear (1) 32 64 AV2+ 0.00 24 AVB Wear (1)

AV3+ 0.00 21 AVB Wear (1)

AV4+ 0.00 18 AVB Wear (2) 33 51 AV2+ 0.00 31 AVB Wear (1) 33 57 AV3+ 0.16 36 AVB Wear (1)

AV2- 0.08 37 AVB Wear (1)

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SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION AUGUST 1994 TABLE 3.1 LIST OF INDICATIONS AND TUBES PLUGGED (Continued)

SG 1 B2E ggl Location  % Characterization Resolution Initial Sample (Continued) 33 59 AV1+ 0.00 31 AVB Wear (1)

AV2+ 0.16 24 AVB WEAR (1)

AV3- 0.11 28 AVB Wear (1) 34 19 C01+ 0.00 23 Cold Leg Wastage (1) 34 53 AV2+ 0.00 35 AVB Wear (1)

AV3+ 0.00 28 AVB Wear (1) 36 66 AV3+ 0.00 23 AVB Wear (1) 37 21 CTS +34.98 18 MFG. Flaw (2) 37 62 AV2+ 0.00 21 AVB Wear (1)

AV3+ 0.00 30 AVB Wear (1) 39 45 AV2+ 0.00 19 AVB Wear (2) 42 62 HTS +14.45 10 MFG. Flaw (2) 44 34 C01+ 0.00 33 Cold Leg Wastage (1) 46 50 C01+ 0.22 19 Cold Leg Wastage (2)

Steam Generator 1 Inspection Initial Sample Results have been classified as Category C-2.

First Expansion Sample No indications Steam Generator 1 Inspection First Expansion Sample Results have been classified as Category C-1.

l (1) - Retest Future Outage (2) - None Required

SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION AUGUST 1994 TABLE 3.2 j LIST OF INDICATIO_NS AND TUBES PLUGGED SG 2 i

Row Cal Location  % Characterization Resolution Initial Sample i

1 2 H07+ 7.16 SAI U-Bend PWSCC Plug Tube 1 11 H07+ 2.56 SAI U-Bend PWSCC Plug Tube ,

1 19 H07+ 2.87 SAI U-Bend PWSCC Plug-Tube 1 1 32 H07+ 2.80 SAI U-Bend PWSCC Plug Tube '

, H07+ 2.91 SAI U-Bend PWSCC l 1 39 H07+ 2.58 SAI U-Bend PWSCC Plug Tube 1 42 H07+ 2.50 SAI U-Bend PWSCC Plug Tube 1 49 H07+ 2.87 MAI U-Bend PWSCC Plug Tube 1 50 H07+ 5.19 SCI U-Bend PWSCC Plug Tube ,

H07+ 6.33 SCI U-Bend PWSCC 1 51 H07+ 7.15 MAI U-Bend PWSCC Plug Tube 1 52 H07+ 6.17 SCI U-Bend PWSCC Plug Tube 1 53 H07+ 7.60 MAI U-Bend PWSCC Plug Tube 1 63 H07+ 7.16 SAI U-Bend PWSCC Plug Tube 1 65 H07+ 7.10 SAI U-Bend PWSCC Plug Tube l 1 67 H07+ 4.01 SCI U-Bend PWSCC Plug Tube ,

1 68 H07+ 5.25 SCI U-Bend PWSCC Plug Tube 1 78 H07+ 8.28 SAI U-Bend PWSCC Plug Tube 1 79 H07+ 8.21 SAI U-Bend PWSCC Plug Tube 1 80 H07+ 2.95 SAI U-Bend PWSCC Plug Tube i 1 86 H07+ 7.48 SAI U-Bend PWSCC Plug Tube 1 87 H07+ 2.76 SAI U-Bend PWSCC Plug Tube 1 89 H07+ 7.23 SAI U-Bend PWSCC Plug Tube H07+ 5.10 SAI U-Bend PWSCC 1 93 H07+ 7.19 SCI U-Bend PWSCC Plug Tube H07+ 6.43 SCI U-Bend PWSCC H07+ 6.83 SCI U-Bend PWSCC 3 44 HTS- 1.02 SAI TTS PWSCC Plug Tube 3 78 CTS +48.25 10 MFG. Flaw (2) 6 93 C01+ 0.00 28 Cold Leg Wastage (1) 7 59 HTS- 1.47 SAI TTS PWSCC Plug Tube 8 49 HTS- 1.14 SAI TTS PWSCC Plug Tube 8 53 HTS- 0.92 SAI TTS PWSCC Plug Tube 8 57 HTS- 1.45 SAI TTS PWSCC Plug Tube 8 59 HTS- 0.22 SAI TTS PWSCC Plug Tube 8 63 HTS- 1.80 SAI TTS PWSCC Plug Tube

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SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION AUGUST 1994 TABLE 3.2 LIST OF INDICATIONS AND TUBES PLUGGED (Continued)

SG 2 Pow Col Location  % Characterization Resolution Initial Sample (Continued) 8 66 HTS- 0.93 SAI TTS PWSCC Plug Tube 8 75 HTS- 0.96 SAI TTS PWSCC Plug Tube 12 92 C01- 0.05 32 Cold Leg Wastage (1) 14 63 HTS + 2.07 <40 TTS ODSCC (1) 16 73 HTS- 0.10 SAI TTS PWSCC Plug Tube 17 28 AV3- 0.08 30 AVB Wear (1) 18 89 C01+ 0.05 20 Cold Leg Wastage (1) 19 28 AV1- 0.08 27 AVB Wear (1) 21 37 H01+42.53 61 OD Indication Plug Tube 22 38 HTS- 0.75 SAI TTS PWSCC Plug Tube 22 41 AV2- 0.08 24 AVB Wear (1) 23 69 AV2+ 0.00 31 AVB Wear (1)

AV3+ 0.00 27 AVB Wear (1) 24 61 AV2+ 0.00 29 AVB Wear (1) 24 63 AV2+ 0.00 29 AVB Wear (1) 24 67 AV2- 0.14 41 AVB Wear Plug Tube AV3- 0.29 42 AVB Wear 25 54 HTS- 0.96 SAI TTS PWSCC Plug Tube 26 70 AV3+ 0.21 27 AVB Wear (1) 27 65 AV2+ 0.00 26 AVB Wear (1)

AV3+ 0.00 20 AVB Wear (1) 29 32 AV2- 0.22 28 AVB Wear (1)

AV3+ 0.03 31 AVB Wear (1)

AV4+ 0.11 31 AVB Wear (1) 29 37 AV2+ 0.00 18 AVB Wear (2)

AV3+ 0.03 16 AVB Wear (2) 29 42 AV1- 0.27 27 AVB Wear (1)

AV2- 0.08 29 AVB Wear (1) j AV3+ 0.00 37 AVB Wear (1) .

AV4- 0.13 18 AVB Wear (2) l 29 56 C04+ 0.08 21 Cold Leg Wastage (1) l 30 44 H04+ 2.i66 MFG. Flaw (2) 9 32 54 AV2+ 0.00 17 AVB Wear (2) j AV3+ 0.00 37 AVB Wear (1) l 32 55 AV1+ 0.16 25 AVB Wear AV2- 0.08 32 AVB Wear AV2- 0.53 20 AVB Wear  !

AV3- 0.18 40 AVB Wear Plug Tube l

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dr SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION AUGUST 1994 4

TABLE 3.2 LIST OF INDICATIONS AND TUBES PLUGGED (Continued)-

SG 2

'l Egg Egl Location  % Characterization Resolution l Initial Sample (Continued) 32 79 Col- 0.08 32 Cold Leg Wastage (1) 33 49 AV1+ 0.00- 26 AVB Wear (1)

AV2+ 0.00 24 AVB Wear (1)

AV3+ 0.00 134 AVB Wear (1)

AV4+ 0.00 21 AVB Wear -(1) 33 62 AV3+ 0.00 20 AVB Wear (1) 34 17 Col- 0.08 15 Cold Leg Wastage (2) 34 63 AV1+ 0.00 20 AVB Wear (1)

AV2+ 0.00 39 'AVB Wear (1)

AV3+ 0.00 23 AVB Wear' (1) 34 64 =AV1+ 0.00 21 AVB Wear AV2+ 0.00 41 AVB Wear- Plug Tube AV3+ 0.00 18 AVB Wear 35 55 H02- 0.10 <40 TSP ODSCC (1) i i

36 18 C01+ 0.18 22 Cold Leg Wastage (1) 37 21 C01+ 0.08 16 Cold Leg Wastage (2) 38 24 C01+ 0.16 29 Cold Leg Wastage (1) 38 46 AV3+ 0.00 17 AVB Wear. (2)

AV4+ 0.00 18 AVB Wear' (2) 39 49 AV3+ 0.00 19 AVB Wear (2)

AV4+ 0.00 17 AVB Wear' (2)-

42 31 C01- 0.19- 25 Cold Leg Wastage (1)'

42 64 C01+ 0.05 20 Cold Leg Wastage (1) 42 66 C01+ 0.03 14 Cold Leg 1 Wastage (2) 43 63 C01- 0.10 27 Cold Leg Wastage -(1) 44 33 C01+ 0.19 4 Cold' Leg Wastage (2) 46 48 C01+ 0.02 13 Cold Leg' Wastage (2)

Steam Generator 2 Inspection Initial Sample Results have been c - classified as Category C-2.

First Expansion Sample 12 19 HTS- 1.43 SAI TTS PWSCC Plug. Tube .

Steam Generator 2 Inspection First Expansion Sample Results have been classified as Category C-2.

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SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION I AUGUST 1994 l

l TABLE 3.2 LIST OF INDICATIONS AND TUBES PLUGGED (Continued)

SG 2 Row Col location  % Characterization Resolution Second Expansion Sample No Indications Steam Generator 2 Inspection Second Expansion Sample Results have been classified as Category C-1.

(1) - Retest Future Outage (2) - None Required i

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SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION AUGUST 1994 TABLE 3.3 LIST OF INDICATIONS AND TUBES PLUGGED SG 3 Row E21 Location  % Characterization Resolution Initial Sample 1 1 H07+ 2.62 SAI U-Bend PWSCC Plug Tube 1 7 H07+ 7.30 MAI U-Bend PWSCC Plug Tube 1 13 H07+ 7.37 SAI U-Bend PWSCC Plug Tube 1 14 H07+ 7.36 SAI U-Bend PWSCC Plug Tube l' -32 H07+ 3.74 SAI U-Bend PWSCC Plug Tube 1 34 H07+ 4.16 SAI U-Bend PWSCC Plug Tube 1 35 H07+ 3.53 SAI U-Bend PWSCC Plug Tube 1 43 H07+ 7.48 SCI U-Bend PWSCC Plug Tube 1 44 H07+ 7.46 SCI U-Bend PWSCC' Plug Tube 5 1 C01+ 0.05 35 Cold Leg Wastage (1) 6 51 H01+ 0.09 SAI TSP ODSCC Plug Tube 8 2 C01+ 0.00 31 Cold Leg Wastage (1) 8 54 H01+ 0.17 SAI TSP ODSCC Plug Tube 8 56 H0l+ 0.05 <40 TSP ODSCC (1) 10 39 HTS + 1.36 <40 -TTS ODSCC (1) 10 61. HTS + 1.58 29. TTS ODSCC (1) 10 62 HTS + 1.04 13 TTS ODSCC (2) 11 2 C01+ 0.00 28 Cold Leg Wastage (1) 12 46 HTS + 1.12 30 TTS ODSCC (1) 13 8 H01+ 0.19 SAI TSP ODSCC Plug Tube l 13 46 HTS + 1.31 <40 TTS ODSCC (1) 13 47 HTS + 1.60 <40 TTS ODSCC (1)~

14 3 C01+ 0.00- 28 Cold Leg Wastage (1) 14 20 H02- 0.02 <40 TSP ODSCC (1) 14 50 HTS- 1.03 SAI TTS PWSCC Plug Tube 17 30 H01+ 0.19 MAI TSP ODSCC Plug Tube AV3+ 0.00 -17 AVB Wear

'19 7 H01+ 0.19 SAI' TSP ODSCC ' lug Tube 19 64 AV2+ 0.00 27 AVB Wear (?)

25 9 C01+ 0.08 38 Cold Leg Wastage (1?

28 45 AV3+ 0.00 21 AVB Wear (1) 3 32 16 'C01+ 0.00 48 Cold Leg Wastage Plus Tube 32 38 CTS + 5.03 17 MFG. Flaw (2) 32 68 H01+ 1.00 36 OD Indication (1)

(2) 33 79 C01- 0.10 14 Cold Leg Wastage 34 16 C01- 0.18 18 Cold Leg Wastage (2)

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. SEQUOYAH NUCLEAR PLANT ,

UNIT 2 l l

CYCLE 6 INSPECTION AUGUST 1994 l

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TABLE 3.3 I 1

LIST OF INDICATIONS AND_ TUBES PLUGGEO (Continued) .

SG 3 Rgy Col Location  % Characterization Resolution Initial Sample (Continued) 34 21 H01+ 0.20 <40 TSP ODSCC (1) 34 43 AV2+ 0.00 29 AVB Wear (1)

AV3+ 0.00 34 AVB Wear (1)

AV4+ 0.00 24 AVB Wear (1) 34 78 C01- 0.03 22 Cold Leg Wastage (1) l 35 17 Col- 0.08 20 Cold Leg Wastage (1) 37 65 HTS + 1.31 35 TTS ODSCC (1) 43 44 H04+ 0.08 <40 TSP ODSCC (1) 44 62 C01- 0.24 39 Cold Leg Wastage Plug Tube 45 36 C01- 0.05 42 Cold Leg Wastage Plug Tube Steam Generator 3 Inspection Initial Sample Results have been classified as Category C-2.

First Expansion Sample 23 21 HTS- 0.39 SAI TTS PWSCC Plug Tube 23 28 HTS- 1.17 SAI TTS PWSCC Plug Tube Steam Generator 3 Inspection First Expansion Sample Results have been classified as Category C-2.

Second Expansion Sample No Indications Steam Generator 3 Inspection Second Expansion Sample Results have been classified as Category C-1.

(1) - Retest Future Outage

_(2) - None Required

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. SEQUOYAH NUCLEAR PLANT UNIT 2 1 CYCLE 6 INSPECTION 1 AUGUST 1994 l l

TABLE 3.4 i LTST OF INDICATIONS AND TUBES PLUGGED SG 4 Eny gal Location  % Characterization Resolution i Initial Sample i 1 94 H02- 0.38 <40 TSP ODSCC (1) 2 40 H01- 0.03 <40 TSP ODSCC (1) 2 55 H01- 0.03 <40 TSP ODSCC (1) 8 46 H01+ 0.23 SAI- TSP ODSCC Plug Tube 9 38 H01+ 0.11 <40 TSP ODSCC (1) 11 3 C01+ 0.05 14 Cold Leg Wastage (2) 11 9 H01+16.14 36 OD Indication (1) j 11 67 HTS + 1.87 18 TTS ODSCC (2) i 11 86 H01+16.22 <40 OD Indication (1) 12 45 H01+ 0.00 <40 TSP ODSCC (1) )

12 67 HTS + 0.96 14 TTS ODSCC (2) i 12 72 H01- 0.08 <40 TSP ODSCC (1) 14 92 H01+ 0.00 <40 TSP ODSCC (1) l 17 15 H01+15.92 <40 OD Indication (1) 18 33 H05- 0.03 <40 TSP ODSCC (1) 20 60 H01+ 0.08 <40 TSP ODSCC (1) 20 69 Hol- 0.08 <40 TSP ODSCC (1) 20 72 H01+15.42 13 OD Indication. (2) 20 80 H01+15.43 14 OD Indication (2) 21 19 C05- 0.16 11 Cold Leg Wastage (2) 22 17 C04- 0.16 <40 Cold Leg Wastage (1)

C05- 0.19 <40 Cold Leg Wastage (1) 23 64 H01+ 0.00 <40 TSP ODSCC (1) 24 21 H01+15.93 15 OD Indication (2) 24 27 H01+16.09 <40 OD Indication (1) 24 28 H01+15.94 <40 OD Indication (1) 26 71 H01- O.16 <40 TSP ODSCC (1) 27 75 H02+ 0.05 <40 TSP ODSCC (1) 28 19 H01+15.99 <40 OD Indication (1) 28 21 H01+15.86 <40 OD Indication (1) 28 31 H01+16.19 <40 OD Indication (1) 2G 63 H02- 0.14 <40 TSP ODSCC (1) 28 67 Hol- 0.08 <40 TSP ODSCC . (1) 28 69 H01+ 0.17 SAI TSP ODSCC Plug Tube 29 19 H01+15.98 <40 OD Indication (1) 29 27 H01+16.06 <40 OD Indication (1)

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SEQUOYAH' NUCLEAR PIANT UNIT 2 CYCLE 6 INSPECTION q AUGUST-1994 .

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TABLE 3.4 l

. 1 LIST OF ' INDICATIONS ' AND TUBES PLUGGED l (Continued)

SG 4  :

H2w Cql ' Location  % Characterization Resoluti'on Initial Sample (Continued) -

29 67 AV1+ 0.00- 14 -AVB Wear (2) ,

AV3+ 0.00 23 'AVB Wear (1) )

I AV4+.0.00: 16 AVB Wear (2) 32 41 AV2+-0.00 14 AVB Wear (2). >

AV3+.0.00 22 AVB Wear (1) 33 22' H01+15.84 <40 OD Indication (1) 35 55 AV1+'O.00 6 AVB Wear (2) 36 65 H01+ 0.00 <40 TSP ODSCC (1) 37 19 C01- 0.22 16 Cold Leg Wastage (2) >

38 44 AV3+ 0.38 20 AVB Wear (1) 38 47 AV3+ 0.00 10 'AVB Wear (2)

AV4+ 0.00 10 .AVB Wear. (2) 38 49 AV3+ 0.00 7 AVB Wear. (2) 38 52 AV3+ 0.00 18- AVB Wear .

(2) 43 35 CO2+ 0.16 21 . Cold Leg Wastage

. (1)

43 61 CO2+ 0.00 31 Cold Leg Wastage (1)-

44 .61 C03+ 0.36 17 Cold Leg Wastage (2) 45 54- CO2+ 0.08 25 Cold Leg Wastage (1) 45 57 CO2+ 0.11 17 Cold Leg Wastage (2)

Steam Generator 4 Inspection Initial-Sample Results have been classified as Category C-2. s 1

First Expansion Sample No indications Steam Generator 4 Inspection First Expansion. Sample Results have. j

.been classified as Category C-1.  ;

(1) . Retest Future Outage (2) - None Required

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- SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 6 INSPECTION AUGUST 1994 l

Table 4  !

NOMENCLATURE Location Nomenclature for Sequoyah Nuclear Plant Notation Descrintion HTE Tube end - hot leg HTS Top of tubesheet - het leg Hol First support plate - hot leg H02 Second support plate - hot leg H03 Third support plate - hot leg H04 Fourth support plate - hot leg H05 Fifth support plate - hot leg H06 Sixth support plate - hot leg '

' H07 Seventh support plate - hot leg C07 Seventh support plate - cold leg C06 Sixth support plate - cold leg C05 Fifth support plate - cold leg C04 Fourth support plate - cold leg C03 Third support plate - cold leg CO2 Second support plate - cold leg Col First support plate - cold leg CTS Top of tubesheet - cold leg CTE Tube end - cold leg Indication locations are designated by the above list with a numeric value in inches above or below. Positive inches indicate positive elevation.

Examples - His+ 1.00 is one inch atnve the hot leg top of tubesheet.

- H01+ 0.25 is one quarter inch above the center of the first hot leg tw support plate.

AVP Anti-Vibration Bar FLBD Flow Lane Blocking Device MFG. Manufacturing ODSCC Outside Diameter Stress Corrosion Cracking PWSCC Primary Water Stress Corrosion Cracking SAI Single Axial Indication g SCI Single Circumferential Indication TSP Tube Support Plate TTS Top-of-Tubesheet

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