ML20147E508
| ML20147E508 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 12/31/1987 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 88-084, 88-84, NUDOCS 8803070088 | |
| Download: ML20147E508 (55) | |
Text
,
ATTACl MENT VIRGINIA ELECTRIC AND POWER C0F T NORTH ANNA POWER-STATION UN',
1987 ANNUAL STEAM GENERATOR' INSERVICE INSPECTION REPORT t
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8803070008 871231
(/ l PDR ADOCK 05000338 g
4 VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA NUCLEAR POWER STATION UNIT NO. I 1987 ANNUAL STEAM GENERATOR INSERVICE INSPECTION REPORT EDDY CURRENT EXAMINATION During 1987 the steam generator tubes were examined twice.
The first examination was performed in May during a scheduled refueling outage.
Tubes in all three steam generators were examined during this outage.
The second examination was performed in July during the tube rupture outage.
Tubes in all three steam generators were examined during this outage.
The material that follows presents the results of the examinations.
These results include the number and extent of the tubes inspected, the location and percent of wall-thickness penetration for each indication of an imperfection, and the 1
identification of the tubes that were plugged. Also included are a "Tubesheet i
Cross Section Plot" (Figure 1) and "Tube Support Plate /Tubesheet Nomenclature" (Figure 2).
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NORTH ANNA UNIT 1 PEFUELING.00TAGE - MAY 1987 STEAM GENERATOR "A" EXAMINATION
SUMMARY
In "A" Steam Generator there were 3262 tube examinations from the inlet side.
2526 tubes were examined to the seventh support plate on the inlet side, 226 tubes were examined to the seventh support plate on the outlet side, and 510 tubes were examined full length (tubesheet to tubesheet).
This is approximately 100 percent of the available tubes.
35 tubes were found to have discontinuity indications less than 20% through wall (%TWD).. 8 tubes were found to have discontinuity indications between 20% and 40% through wall
(%TWD).
25 tubes were found to have discontinuity indications greater than 40% through wall (%TWD).
A total of 83 tubes were plugged.
Refer to the table below for details.
1.
The following is a list of tubes with eddy current indications.
L j
BQM [QL %TWD LOCATION REMARKS 23 15
<20 1H 21 17
<20 4H 22 17
<20 2H 26 20
<20 6H 28 20
<20 6H 10 29
<20 HTS l
14 31
<20 HTS l
13 32
<20 HTS 14 33
<20 HTS l
14 34
<20 HTS 16 39
<20 HTS 13 43
<20 HTS 14 43
<20 HTS 15 44
<20 HTS l
15 45
<20 HTS l
16 45
<20 HTS l
7 46
<20 7H i
7 47
<20 7H 15 49
<20 HTS 28 50
<20 3AVB 14 51
<20 5H l
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1 1
4 RQM LDL 2mg1 LOCATION REMARK 5 21-51
<20 6H 8
53
<20 5H-40 56
<20 lH 44 62'
<20 2AVB 44 62- <20 3AVB 20 63-
<20 1H 20 63
<20 1H-2H 20 63
<20 2H-3H 20 63
<20 2H-3H 21 64
<20 HTS 12 65
<20 lH 13 66
<20 HTS 10 67
<20 CTS 20 67
<20 HTS 23 67
<20 HTS 23 68
<20 HTS 33 78
<20 1AVB 26 85
<20 2AVB 14 45 20 HTS 28 48 20 HTS 36 74 21 3AVB 15 48 22 HTS 17 42 23 HTS 15 46 25 HTS 20 63 25 1H-2H 18 33 31 HTS PLUGGED 6
58~
66 7H PLUGGED 9
22 69 SH PLUGGED l
10 20 70 4H PLUGGED 3
91 74 4H PLUGGED 6
9 80 2H PLUGGED 10 22 81 4H PLUGGED 10 13-85 2H
-PLUGGED 3
52 85 1H PLUGGED 7
54 85 6H PLUGGED 6
9 86 IH PLUGGED 27 81 36 1H PLUGGED 11 83 86 1H PLUGGED 4
67 89 5H PLUGGED 6
56 90 5H PLUGGED 4
59 90 2H PLUGGED l
4 67 90 1H PLUGGED 5'
73 92 3H PLUGGED 11 14 94 4H PLUGGED 6
15 95 5H PLUGGED 16 50 95 2H PLUGGED l
9 19 96 lH PLUGGED 3
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RQW ~faL XIWQ LOCATION REMARKS
'Ib 14 21.
96 2H PLUGGED 18 71 96 IH PLUGGED 9
73 96 2H PLUCGED 6
-9L 97 4H-PLUf,GED 16 50.
97 2H U UGGED 16
.50 98 4H PLUGGED 3
59 l98 1H
' PLUGGED g
11 83 98 lH PLUGGED 5
12
-99 4H-
-PLUGGED l
9 22 99 1H PLUGGED l-5
.57 99 IH PLUGGED
- 2..The-following tubes were plugged based on distorted indications (DI) at the tube support plates which were-detected using the standard bobbin probe. A percent through wall depth (% TWD) of penetration could~ not be determined.
RQW fat 5IWQ LOCAUQN REMARKS 12 2
DI IH PLUGGED 6
9 DI 4H.
PLUGGED 2
11 DI 5H PLUGGED 4
12 DI IH PLUGGED
.5-12 DI 5H PLUGGED 10-12 DI 2H PLUGGED 2
13 DI 5H PLUGGED l
5 13 DI 2H PLUGGED 5
13 DI-2H PLUGGED 10 13 DI 2H PLUGGED 10 is D1 5H PLUGGED 15 13 DI 2H PLUGGED 7
14 DI IH,
< PLUGGED 7
14 DI 2H-PLUGGED t
11 14 DI 4H PLUGGED 3
15 DI 3H.
PLUGGED 6
15
.DI 1H PLUGGED l
6 151 DI 5H.
PLUGGED i
10 15 DI 2H PLUGGED i
10 15 DI 2H PLUGGED i
9 16 DI 2H PLUGGED 19 17 DI 2H' PLUGGED i
I 9
18 DI 3H PLUGGED 9
19-DI lH PLUGGED 10 20 DI 2H PLUGGED l
6 21 DI 5H PLUGGED i
7 21 DI 4H PLUGGED 7
21 DI 4H PLUGGED 9
22 DI IH PLUGGED 4
i
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c 4
BQW _(DL $Ih'Q LOCATION EMES 10
'22' DI 2H PLUGGED-5 23 DI 2H PLUGGED 11 24 DI 3H PLUGGED 11 24 DI 3H PLUGGED 5
25 DI IH PLUGGED 3
26 DI, 2H PLUGGED 3
26 DI 3H PLUGGED 3
26 DI 3H PLUGGED 12 28 DI 3H PLUGGED 8
32 DI IH PLUGGED 18 33 DI 5H PLUGGED 12 36 DI IH
' LUGGED 12 36 DI 2H PLUGGED 23 38 DI IH PLUGGED 19 41 DI 2H PL'tSGED 19 41 DI 2H PLUGGED 3
44 DI IH PLUGGED 2
51 DI 5H PLUGGED 28 53 DI 4H PLUGGED 7
54 DI 4H PLUGGED 7
54 DI 5H PLUGGED 4
55 DI 4H PLUGGED 4
55 DI 5H PLUGGED 15 55 DI 2H PLUGGED 28 55 DI 4H PLUGGED 2
56 DI 2H PLUGGED 5
57 DI 2H PLUGGED 7
57 DI 1H PLUGGED 27 57 DI 2H PLUGGED 27 57 DI 6H PLUGGED 10 60 DI IH PLUGGED 11 64 DI 6H PLUGGED 14 64 DI IN PLUGGED 14 64 DI IH PLUGGED 6
65 DI lH PLUGGED 1
67 DI 5H PLUGGED 4
67 DI 6H PLUGGED 6
67 DI 1H PLUGGED 18 70 DI 2H PLUGGED 18 71 DI 1H PLUGGED 17 80 DI IH PLUGGED 10 82 DI IH PLUGGED 15 85 DI 4H PLUGGED 3
91 DI 4H PLUGGED 5
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The following tubes were plugged based on possible indications (PI) in the vicinity of the tube sheet or tube support plates which were detected using the.8x1 probe and verified using the RPC probe.
A percent.through wall depth (% TWD) of penetration could not be determined.
BQW [HL EIWQ LOCATION REMARKS 11 2
PI HTS PLUGGED 15 3
PI HTS PLUGGED 3
17 PI HTS PLUGGED 17 23
-PI HTS PLUGGED 21 25 PI HTS PLUGGED 19 27 PI HTS PLUGGED 17 31 PI HTS FULLED / PLUGGED 18 33 PI HTS PLUGGED 18 34 PI HTS PLUGGED 21 35 PI HTS PLUGGED 18 36 PI HTS PULLED /PLUCGED 20 36 P1 HTS PLUGGED 20 37 PI HTS PLUGGED 14 60 PI HTS PLUGGED 5
75 PI HTS PLUGGED 4
78 PI HTS PLUGGED i
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NORTH ANNA UNIT 1 REFUELING OUTAGE - MAY 1987 STEAM GENERATOR "B" EXAMINATION
SUMMARY
In "B" Steam Generator there were 3272 tube examinations from the inlet side.
2478 tubes were examined to the seventh support plate on the inlet side, 234 tubes were examined to the seventh support plate on the outlet side, and 560 tubes were examined full length (tubesheet to tubesheet).
This is approximately 100 percent of the available tubes. 87 tubes were-found to have discontinuity indications less the 20% through wall (%TWD).
19 tubes were found to have discontinuity indications between 20% and 40% through wall
(%TWD).
17 tubes were found to have discontinuity indications greater than 40% through wall (%TWD).
A total of G2 tubes were plugged.
Refer to the table below for details.
l.
The following is a list of tubes with eddy current indications.
EQW QL $IE LOCATION REMARKS 12 4
<20 2AVB 24 8
<20 2AVB 24 8
<20 1AVB 16 10
<20 3AVB l
22 10
<20 2AVB 22 10
<20 4AVB 22 10
<20 3AVB 25 11
<20 2AVB 25 11
<20 3AVB 25 11
<20 4AVB l
28 12
<20 1AVB 26 13
<20 3AVB 26 13
<?O 4AVB 27 13
<20 2AVB 27 13
<20 4AVB 29 13
<20 3AVB 22 15
<20 2AVB 30 15
<20 3AVB 16 16
<20 SH 21 19
<20 2AVB i
21 19
<20 3AVB 32 19
<20 1AVB i
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r EQW CD1 XI)fD LOCATION REMARKS 32 19
<20 2AVB
' 20
-2AVB 35 19 35 19
<20 3AVB 23 20
<20 1AVB 23 20
<20 2AVB 23 20
<20 4AVB 37 20
<20 1H 26 22
<20 7H 16 25
<20 4AVB 19. 25
<20 1AVB 21 27
<20.
3AVB 23 28
<20 1AVB 26 28
<20 1AVB 26 28
<20 2AVB 26 28
<20 3AVB 28 28
<20 1AVB 28 28
<20 3AVB e
28 28
<20 4AVB i
35 28
<20 3AVB 7
33
<20 6H 12 34
<20 2H 28 34
<20 2AVB 40 37
<20 1AVB 19 40
<20 4AVB 19 40
<20 1AVB 12 42
<20 1AVB 12 42
<20 4AVB 14 42
<20 HTS 28 42
<20 1AVB 28 42
<20 2AVB 14 44
<20 HTS 16 44
<20 HTS 16 45
<20 HTS 17 46
<20 HTS i
43 47
<20 6H 15 48
<20 HTS 14 49
<20 1AVB i
23 49
<20 1AVB
,f 18 50
<20 1AVB 18 50
<20 3AVB 43 50
<20 1AVB 16 51
<20 1AVB 46 51
<20 1AVB 35 52
<20 1AVB 43 52
<20 7H 15 53
<20 1AVB 17 53
<20 2AVB 8
i P
4-EQW CAL 5IMQ LQff '.QH REMARKS 27 53
<20 3 AVL 42 53
<20 1AVB 46 53
<20 2AVB 46 53 ' <20 3AVB 22 54
<20-1AVB 44 54
-<20 1AVB 44 54
' 20 2AVB 44 54
<20 3AVB 24 55
<20 2AVB 41 55
<20
!AVB 41 55
<20-2AVB 37 56
<20 6C 45 56
<20 1AVB 33 57
<20 5C 44 57
<20 lH 31 59
<20 2AVB 35 59
<20 2AVB PLUGGED 32 62
<20 1AVB 32 62
<20 2AVB 35 65
<20 1AVB 32 71
<20 2AVB 35 71
<20 1AVB 35 71
<20 2AVB 39 71
<20 2AVB 14 72
<20 1AVB 14 72
<20 4AVB 15 72
<20 2AVB 15 72
<20 3AVB t
21 72
<20 1AVB 31 72
<20 1AVB 32 72
<20 1AVB 32 72
<20 2AVC 34 72
<20 2AVB 13 73
<20 1AVB 13 73
<20 4AVB 21 73
<20 1AVB 33 73
<20 1AVB 35 73
<20 1AVB PLUGGED 36 73
<20 1AVB 36 73
<20 2AVB 38 73
<20 1AVB 38 73
<20 2AVB 37 75
<20 2AVB l
37 75
<20 3AVB 27 76
<20 2AVB 37 76
<20 2H 14 77
<20 4H i
9 i
Y~.
+
l RQW -C.QL &JE LOCATION REMARKS 2
78 ;<20 4H 4 : 80
<20
-2H 17 89
<20 2AVB 17 89
<20 3AVB 19 25 21 3AVB 13 27 21 2AVB 26 27 21 2AVB 27 76 21 1AVB 29 82 21 1AVB 24 55 22 1AVB 31 72 22 2AVB 28 82 22 1AVB 36 36 23 1AVB 45 56 23 2AVB 17 15 24 4AVB 39 53 24 1AVB 33 16 25 2AVB 36 36 25 2AVB 19 40 25 2AVB 19 40 25 3AVB 33 16 26 1AVB 27 11 27 3AVB 26 13 29 2AVB 29 16 31 1AVB 1
37 72 6B 2H PLUGGED 11 71 78 HTS PLUGGED 2
72 85 2H PLUGGED 5
39 88 1H PLUGGED
-20 32 91 lH PLUGGED 18 75 91 1H PLUGGED 3
72 92 4H PLUGGED i
2 66 93 3H PLUGGED 37 72 93 lH PLUGGED 20 38 94 IH PLUGGED l
20 38 95 IH PLUGGED i
26 45 95 1H PLUGGED 26 45 95 IH PLUGGED 3
27 97 1H PLUGGED 20 38 97 3H PLUGGED 4
23 98 IH PLUGGED 38 52 98 IH PLUGGEO 26 45 99 IH PLUGGED 26 45 99 lit PLUGGED 11 70 100 HTS PLUGGED l
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2c The following. tubes were plugged based. on distorted indications (DI) at the tube support plates which were detected using.the standard bobbin
- probe. A percent through wall depth (% TWD) of penetration could not be determined.
RQW LDL 3Dg1 LOCATION REMARKS 12 2
DI 2H PLUGGED 12 2
DI 2H PLUGGED 4
7 DI IH PLUGGED' 3
8 DI IH PLUGGED 4
9 DI IH PLUGGED 7.
9 DI 1H PLUGGED 8
10 DI IH-PLUGGED 3
12 DI 3H PLUGGED-4 23
'DI 2H PLUGGED 5
23 DI IH-PLUGGED
~6 23 DI 1H PLUGGED 5
25
~DI 1H PLUGGED 14 25' Di 1H PLUGGED 3
27 DI 2H PLUGGED 20 30 DI F
PLUGGED 20' 30 DI In PLUGGED 12 31 DI lb PLUGGED 19 31 DI IH PLUGGED 26 31 DI 7H PL;'GGED 19 32 DI IH PLUbGFD 19 32 DI 1H PLUGGCo a
40 DI 1H PLUGGED 14 40
' DI
.lH PLUGGED l.
14 40 DI 1H PLUGGED i
23.
41 DI IH PLUGGED i
3 42 DI IH PLUGGED 3' -42.
DI 11'
- PLUGGED, 15 44 DI 14 PLUGGED
~
25 44 DI 1A PLUGGED 25 44 DI JM PLUGGED 26
- 45 DI
'H PLUGGED 11 47 DI 1H PLUGGED-t 12 47 DI lH PLUGGED 11 49 DI IH PLUGGED 11 49 DI 1H PLUGGED 11 50 DI IH PLUGGED 2
55 DI IH PLUGGED 15 55 DI IH PLUGGED 6
57 DI 2H PLUGGED g
6 59 DI 4H PLUGGED 2
66 DI 2H PLUGGED l
2 66 DI 3H PLUGGED i
l 31 66 DI IH PLUGGED I
11
M [R M LOCATION REMARKS 31 66 DI IH PLUGGED 6
68 DI 2H PLUGGED' 2
69 DI 2H PLUGGED 35 73 DI IH PLUGGED 2
75 DI.
2H PLUGGED 2
83 DI 3H PLUGGED 29 84 DI 5H PLUGGED 3.
The following tubes were plugged based on possible indications (PI) in the vicinity of the tube sheet or tube support plates which were detected using the 8x1, probe and verified using the RPC prcbe.. A percent through wall depth '(% TWD) of penetration could not be determined.
M fE M LOCATION REMARKS 16 33 PI HTS-PLUGGED 35 34 PI HTS PLUGGED 15 44 PI HTS PLUGGED 25 49 PI HTS PLUGGED 35 59 PI HTS PLUGGED 29 64 PI HTS PLUGGED 30 65 PI HTS PLUGGED 41 66 PI HTS PLUGGED 38 68 PI HTS PLUGGED 39 68 PI HTS PLUGGED 10 69 PI HTS PLUGGED 7
71 PI HTS PLUGGED E
h 12
NORTH ANNA UNIT 1 REFUELING OUTAGE - MAY 1987 STEAM GENERATOR "C" EXAMINATION SUMARY e
In "C" Steam Generator there were 3235 tube examinations from the inlet side.
2472 tubes were examined to the seventh support plate on the inlet side, 247 tubes were examined to the seventh support plate on the outlet side, and 516 tubes were examined full length (tubesheet to tubesheet).
This is approximately 100 percent of the available tubes. 86 tubes were found to have discontinuity indications less than 20% through wall (%TWD).
19 tubes were found to have discontinuity indications between 20% and 40% through wall
(%TWD).
30 tubes were found to have discoatinuity indications greater than 40% through wall (%TWD).
A total of 118 tubes were plugged.
Refer to the table below for details.
1.
The following is a list of tubes with eddy current indications.
BQM [01 KIWQ LOCATION REMARKS 7
1
<20 2H 10 2
<20 6H 6
3
<20 1H 21 7
<20 SH 22 8
<20 6H 20 9
<20 4AYB 21 9
<20 7H 20 10
<20 2AVB 23 10
<20 7H 23 11
<20 1AVB 23 11
<20 SH 24 12
<20 1AVB 8
14
<20 1H 19 14
<20 3AVB 2E 14
<20 1AVB 7
17
<20 4H-5H 10 17
<20 SH 3
18
<20 HTS 8
18
<20 7H 3
19
<20 HTS 28 19
<20 3AVB 34 19
<20 6H
)
13
RQW IQL KIWQ LOCATION REMARKS 37 20
<20 1AVB 9
21
<20 7H 32
-22
<20 4H 31 23
<20 4H 30 24
<20 6H 37 24
<20 6H 24 26
<20 3H.
32' 26
<20 7H 38 26
<20 7H 33 28
<20 7H 10 29
<20 HTS 38 30
<20 6H 38 30
<20 7H i
10 31
<20 HTS 31
-31
<20 3H 33 31
<20 5H 36 31
<20~
7H 40 31
<20 6H 40 32
<20 6H 40-33
<20 6H 13 35
<20.
HTS-1H 41 35
<20 7H 7
36
<20 6H 13 36
<20 HTS 13 37
' 20 HTS 18 39
<20 1AVB 3
40
<20 lH PLUGGED 13 40
<20 HTS l
13 41
<20 HTS PLUGGED 13 41
<20 HTS PLUGGED l
14 41
<20 HTS 44 41
<20 7H 13 42
<20 HTS PLUGGED 13 42
<20 HTS PLUGGED 13 42
<20 1AVB PLUGGED 13 43
<20 HTS 25 43
<20 6H 45 43
<20 7H l
13 44
<20 HTS l
13 44
<20 5H 14 44
<20 HTS 22 44
<20 1H 43 44
<20 7H 12 45
<20 HTS l
13 47
<20 HTS l
13 48
<20 HTS i
i 13 48
<20 HTS f
14
BQW [QL HIE LOCATION REMARKS 4
-14 48
<20 HTS" 38 51
<20 lH 33 52
<20 6H 34 52
'<20 5H '
-43 52
<20 6H
-45 52
<20-4H 40 53
<20 7H
.20 56
<20 1H 39 56
<20 5H 44 56
<20 7H 38 58
<20 4H 40 58
<20 6H 5
59
<20 4H 40 59
<20 4H 34 61
<20 7H 41 62
<20 5H 34 66
<20 4H 5
68
<20 3H 5
75
<20 2H 23 78
<20 6H 23 78
<20 7C 10 81
<20 7H 10 82
<20 7H 8
84
<20 lH 8
87
<20 6C 17 5
20 3AVB 13 19 20 1AVB 18 23 20 3AVB 23 65 20 3AVB 12 41 21 HTS 12 43 21 HTS 23 11 22 3AVB 26 14 22 2AVB 5
22 22 HTS 27 40 22 1AVB 14 70 22 1AVB 32 35 23 1AVB 27 76 23 3AVB 8
16 25 HTS 13 47 26 HTS 13 46 27 HTS 13 44 29 HTS 14 47 31 HTS 9
32 33 HTS 13 46 39 HTS 33 72 44 3H PLUGGFD 3
28 68 2H PLUGGED i
i I
15 l
l l
RQM G.QL 51.WQ LOCATION REMARKS 24 58 70 2H PLUGGED 31-60 71 2H PLUGGED 4
4 80 1H PLUGGED 2
38 82 2H PLUGGED 2
39 82 2H PLUGGED 3
62 83 6H PLUGGED 31 47 84 HTS PLUGGED 22 7
85 1H PLUGGED 3
40 85 2H PLUGGED 9
22 86 2H PLUGGED 8
11 87 2H PLUGGED 4
20
'87 3H PLUGGED 8
67 88 IH PLUGGED 2
38 89 2H PLUGGED 2
50 89 HTS PLUGGED 9
69 89 IH PLUGGED 4
6 90 2H PLUGGED 5
13 91 1H PLUGGED 8
23 91 1H PLUGGED 12 24 92 2H PLUGGED 7
79 92 4H PLUGGED 11 10 93
-2H PLUGGED 2
26 93 4H PLUGGED 17 40 94 2H PLUGGED 3
62 94 5H PLUGGED 8
64 94 IH PLUGGED 9
69 94 lH PLUGGED 5
13 95 1H PLUGGED 11 10 96 2H PLUGGED 8
11 96 2H PLUGGED 3
62 96 5H PLUGGED l
4 6
97 IH PLUGGED 5
19 97 2H PLUGGED 2
26 97 4H PLUGGED 17 40 97 IH PLUGGED 5
55 97 3H PLUGGED 31 37 98 1H PLUGGED l
5 55 98 2H PLUGGED l
3 13 99 3H PLUGGED 5
55 100 3H PLUGGED 16
2.
The following tubes were plugged based on distorted indications (DI) at the tube support plates which were detected using the standard bobbin probe. A percent through wall depth (% TWD) of penetration could not be determined.
RQW E.0L MIMQ LOCATION REMARKS 3
4 DI lH PLUGGED 4
4 DI 3H PLUGGED 9
4 DI 2H PLUGGED 9
5 DI 2H PLUGGED 9
5 DI 2H PLUGGED 11 5
DI 1H PLUGGED 11 5
DI 2H PLUGGED 4
6 DI 3H PLUGGED 4
6 DI 4H PLUGGED 11 6
DI 3H PLUGGED 6
7 DI IH PLUGGED 7
8 DI 2H PLUGGED 7
8 DI 2H PLUGGED 5
9 DI 1H PLUGGED 6
11 DI 2H PLUGGED 6
11 DI 3H PLUGGED 3
13 DI 3H PLUGGED 9
13 DI 3H PLUGGED 8
15 DI 2H PLUGGED 11 15 DI IH PLUGGED 6
17 DI 2H PLUGGED 6
17 DI 2H PLUGGED 4
18 DI IH PLUGGED 4
18 DI 2H PLUGGED 6
18 DI 2H PLUGGED 24 18 D!
1H PLUGGED 4
20 DI 2H PLUGGED 4
20 DI 3H PLUGGED 12 20 DI 2H PLUGGED 15 20 DI IH PLUGGED 2
21 DI 2H PLUGGED 2
21 DI 2H PLUGGED 19 21 DI 6H PLUGGED 20 21 DI IH PLUGGED 4
22 DI 2H PLUGGED 6
23 DI 2H PLUGGED 12 23 DI 2H PLUGGED 12 23 DI 4H PLUGGED 2
25 DI 3H PLUGGED 3
26 DI 2H PLUGGED 3
26 DI 3H PLUGGED 23 26 DI 1H PLUGGED 15 28 DI 2H PLUGGED 13 31 DI 2H PLUGGED 11 33 DI 3H PLUGGED 17
A
^
BQW [QL_ KIMQ LOCATION REMARKS 5'-
34
_DI
.4H PLUGGED 2-36 DI 2H PLUGGED
.3
-36 DI IH PLUGGED-2 23 36-DI 1H PLUGGED
,23 37 D1 lH PLUGGED
'23 '37 DI 1H
-PLUGGED 35 38 DI 3H PLUGGED 38 38 DI 2H PLUGGED 14 39 DI-1H PLUGGED 24 39
-DI 6H PLUGGED 26 39 DI 2H PLUGGED 17 40-DI IH PLUGGED 17 40 DI 2H PLUGGED 21 40 DI 3H PLUGGED 13 41 DI 2H PLUGGED 18 41 DI 1H PLUGGED 19 41 DI IH PLUGGED 39 41 DI 3H PLUGGED 2
42 DI 3H PLUGGED 2
42 DI 3H PLUGGED 13 42 DI IH PLUGGED 2
43 DI IH PLUGGED 2
43 DI 2H PLUGGED 32 45 DI 2H PLUGGED 24 46 DI 6H PLUGGED 26 46 DI 6H PLUGGED 16 48 DI IH PLUGGED 16 48 DI IH PLUGGED 16 48 DI 2H PLUGGED 16 48 DI 2H PLUGGED 20 48 DI 2H PLUGGED 13 49 DI IH PLUGGED 23 49 DI 2H-PLUGGED 35 49 DI 3H PLUGGED 2
50 DI 2H PLUGGED l
2 50 DI 4H PLUGGED 2
50 DI 4H PLUGGED 2
50 DI 6H PLUGGED 23 51 DI 2H PLUGGED 14 52 DI IH PLUGGED 5
54 DI IH PLUGGED 21 54 DI 5H PLUGGED 4
56 DI 2H PLUGGED 4
56 DI 3H PLUGGED 5
56 DI IH PLUGGED l
8 56 DI IH PLUGGED 23 56 DI 2H PLUGGED f
l 18 l
l I
c.?
.7 BQW [QL XIMQ LOCATION REMARKS 24 58
- DI 2H PLUGGED 9
59 DI 3H-
. PLUGGED 2
60 DI 1H PLUGGED 8
60-DI 1H PLUGGED 4
62 DI 1H PLUGGED 6
62
.DI lH PLUGGED
-31 65
- DI
.2H-PLUGGED 31 65 DI 2H PLUGGED
-5 67 DI IH PLUGGED 5
67 DI.
'. 2H PLUGGED 5
167 DI 3H PLUGGED-5 67 DI L 3H PLUGGED 9
69 DI 2H PLUGGED 9
69 DI 3H PLUGGED 6 '72 DI 2H PLUGGED ~
6 -72 DI 2H PLUGGED 6
72 DI 4H PLUGGED 6
72 DI 6H PLUGGED 7-79 DI 4H PLUGGED 6
84 DI 4H PLUGGED 6
84 DI 4H PLUGGED 7
84 DI IH PLUGGED 2
86 DI 2H PLUGGED 2
86 DI 2H PLUGGED 7
89 DI 2H PLUGGED 7
89 DI 2H PLUGGED 11 89 DI 1H PLUGGED 6
91 DI 5H PLUGGED 7
91 DI 1H PLUGGED i
3.
The following tubes were plugged based on possible indications (PI) in the vicinity of the tube sheet or tube support plates which were detected using the 8x1 probe and verified using the RPC probe.
A percent through wall depth (% TWD) of penetration could not be determined.
RQM CDL KIMD LOCATION REMARKS 24 8
PI HTS PLUGGED 5
15 PI HTS PLUGGED 31 47 PI HTS PLUGGED 31 48 PI HTS PLUGGED 17 54 PI HTS PLUGGED 6
74 PI HTS PLUGGED i
7 74 PI HTS PLUGGED 8
74 PI HTS PLUGGED 8
75 PI HTS PLUGGED 25 78 PI HTS PLUGGED I
19
4
- 4. LThe following tube was erroneously plugged having no pluggable or potential pluggable indication.
BQW G.QL EDR1 REMARKS 6
22 NONE PLUGGED i
i s
l 4
l i
1 20 l
I
NORTH ANNA UNIT 1 TUBE RUPTURE OUTAGE - JULY 1987 STEAM GENERATOR "A" EXAMINATION
SUMMARY
In "A"
Steam Generator, as a minimum, those areas of tubing not examined during the previous outage (April,1987). were examined during this outage.
The scope of the tube examinations during this outage.is described in Section VI.D.1 of the "North Anna Unit 1 July 15,1987 Steam Generator Tube Rupture Event Report," September 15, 1987, Revision 1, which was submitted by Virginia Electric and Power Company letter dated September 15, 1987 (Serial No.
87-474A).
15 tubes were found to have discontinuity indications less than 20%
through wall (%TWD). 7 tubes were _found to have discontinuity indications between 20% and 40% through wall (%TWD).
No tubes were found to have discontinuity indications greater than 40% through wall (%TWD).
A total of 105 tubes were plugged. Refer to the table below for details.
1.
The following is a list of tubes with eddy current indications.
RQW CQL KIWQ LOCATION REMARKS 24 22
<20 3AVB 17 23
<20 3AVB 14 33
<20 HTS 43 38
<20 4C-SC 17 42
<20 HTS 15 44
<20 HTS 26 48
<20 SC-6C 26 69
<20 HTS-lH 24 73
<20 2AVB 27 73
<20 2AVB 29 73
<20 2AVB 32 73
<20 2AVB 38 74
<20 2AVB 36 76
<20 2AVB 9
87
<20 1AVB 31 20 21 3C-4C 22 47 21 2AVB 13 43 24 HTS 20 84 24 2AVB 22 22 27 2AVB 15 48 29 HTS PLUGGED 15 46 30 HTS PLUGGED l
21 i
2.
The following tubes were not properly supported by AVB or are adjacent to a plugged tube that is not properly supported by AVB..These tubes were plugged with mechanical plugs on the hot leg side and with Sentinel plugs r
on the cold leg side.
BQW [QL REASON REMARKS 9
2 AVB PLUGGED 10 2
AVB PLUGGED 8
3 AVB PLUGGED 10 3
AVB PLUGGED 11 3
AVB PLUGGED 12 3
AVB PLUGGED 13 3
AVB PLUGGED 8
4 AVB PLUGGED 10 4
AVB PLUGGED ~
11 4
AVB PLUGGED 10 5
AVB PLUGGED 11 5
AVB PLUGGED i
10 7
AVB PLUGGED 11 7
AVB PLUGGED 10 8
AVB' PLUGGED 11 8
AVB PLUGGED i
9 14 AVB PLUGGED f
9 24 AVB PLUGGED 9
32 AVB PLUGGED l'
10 32 AVB PLUGGED 10 33 AVB PLUGGED 9
35 AVB PLUGGED 10 35 AVB PLUGGED 10 36 AVB PLUGGED 10 37 AVB PLUGGED 11 37 AVB PLUGGED i
9 38 AVB PLUGGED 10 38 AVB PLUGGED 11 38 AVB PLUGGED 10 39 AVB PLUGGED 11 39 AVB PLUGGED 9
40 AVB PLUGGED 10 40 AVB PLUGGED 11 40 AVB PLUGGED i
9 41 AVB PLUGGED 10 41 AVB PLUGGED i
11 41 AVB PLUGGED 9
42 AVB PLUGGED i
9 43 AVB PLUGGED 10 44 AVB PLUGGED 9
45 AVB PLUGGED 10 45 AVB PLUGGED l
i 22
^
BQW G.QL REASON REMARf.S 9
46 AVB PLUGGED 10 46 AVB PLUGGED 11 46 AVB PLUGGED-9-
47 AVB PLUGGED 10 47 AVB PLUGGED 11 47 AVB PLUGGED 9
48 AVB PLUGGED 10 52 AVB PLUGGED 11 52 AVB PLUGGED
~12 52 AVB PLUGGED-10 53 AVB PLUGGED 12 53 AVB PLUGGED 9-54 AVB PLUGGED 10 54 AVB PLUGGED 11 54 AVB Pl.UGGED 12 54 AVB PL')GGED 9
59 AVB PLJGGED 10 59 AVB PLUGGED 11 59 AVB PLUGGED 9
60 AVB PLUGGED 11 60 AVB PLUGGED 9
61 AVB PLUGGED 10 61 AVB PLUGGED 11 61 AVB PLUGGED 9
66 AVB PLUGGED 10 72 AVB PLUGGED 10 73 AVB PLUGGED l
10 76 AVB PLUGGED l
10 77 AVB PLUGGED 10 78 AVB PLUGGED 4
11
~78 - AVB PLUGGED 12 78 AVB PLUGGED 10 79 AVB PLUGGED 11 79 AVB PLUGGED 12 79 AVB
' PLUGGED 10 93 AVB PLUGGED i
11 93 AVB PLUGGED I
12 93 AVB PLUGGED I
23 l
i
~
3.
The fo
ing tubes were plugged based on distorted indications (DI) at support plates which were detected using the standard bobbin
+'-
' confirmed using the RPC probe. A percent through wall depth (%
ooe snetratior could not be determined.
a-BQM [QL &IMQ LOCATION REMARKS 27 30 DI IH PLUGGED 5
53 DI IH PLUGGED 5
53 DI 4H PLUGGED 11 53 DI 2H PLUGGED 40 56 DI IH PLUGGED 6
61 DI IH PLUGGED 5
68 DI SH PLUGGED 4.
Tne following tubes were plugged based on possible indications (PI) in the vicinity of the tube sheet or tube support plates which were detected using the 8xl probe and verified using the RPC probe.
A percent through wall depth (% TWD) of penetration could not be determined.
EQM [01 KLWD LOCATION REMARKS 4
19 PI HTS PLUGGED 45 36 PI 2C PLUGGED 21 38 PI CTS PLUGGED 22 38 PI HTS PLUGGED 23 39 PI CTS PLUGGED 13 43 PI HTS PLUGGED 14 43 PI HTS PLUGGED 11 65 PI HTS PLUGGED 12 88 PI CTS PLUGGED 15 90 PI CTS PLUGGED 5.
The following tubes were plugged based on tubesheet indications (TI) which were detected using the standard bobbin probe and confirmed using the RPC probe. A percent through wall depth (% TWD) of penetration could not be determined.
R0W (QL %TWD LOCATION REMARKS 32 47 TI HTS PLUGGED 25 48 TI HTS PLUGGED 28 48 TI HTS PLUGGED 31 48 TI HTS PLUGGED 13 63 TI HTS PLUGGED 24
r 6.
The following tubes were plugged because they would not pass an 8x1 probe.
i f M f&L REASON REMARKS k
38 33 RESTRIC. PLUGGED 45-54-RESTRIC. PLUGGED i
i i
I I
5 I
I t
I f
a f
v l
i 25 f
f
=
9 1,
NORTH ANNA UNIT 1 TUBE RUPTURE OUTAGE - JULY 1987
' STEAM GENERATOR "B" EXAMINATION
SUMMARY
In "B"
Steam Generator, as a minimum, those areas of tubing not examined
.during the previous outage (April,1987) were exam ned during this outage.
i The scope of the tube examinations during this outage is described in Section VI.D.1 of the "North Anna Unit 1 July 15,1987 Steam Generator Tube Rupture Event Report," September 15, 1987, Revision 1, which was submitted by Virginia Electric and Power Company letter dated September 15, 1987 (Serial No.
87-474A).
19 tubes were found to have discontinuity indications less than 20%
through wall (%TWD). 215 tubes were found to have discontinuity indications between 20% and 40% through wall
(%TWD).
No tubes were found to have discontinuity indications greater than 40% through wall (%TWD). A total of 39 tubes were plugged. Refer to the table below for details.
1.
The following is a list of tubes with eddy current indications.
Il0M fal $1MQ LOCATION REMARKS 28 12
<20 1AVB 17 14
<20 4AVB 26 14
<20 4AVB 9
23
<20 7H 9
24
<20 4AVB 24 24
<20 1AVB 24 26
<20 3AVB 23 27
<20 3AVB 9
30
<20 7H 17 42
<20 HTS 27
'53
<20 3fSB 8
65
<20 4AVB 8
66
<20 4AVB 8
68
<20 1AVB 9
70
<20 1AVB 12 72
<20 4AVB 33 73
<20 1AVB 12 74
<20 1AVB 12 77
<20 4AVB 29 20 20 3AVB 24 21 20 3AVB 19 23 20 3AVB 26
4 e
B@( (DL &lE LOCATION REMARKS 24 25 20 1AVB 31 25 20 4AVB 36 32 20 3AVB 41 65 20 1AVB 18 69 20 2AVB 25 16 21 3AVB 33 18 21 1AVB 24 19 21 3AVB 24 19 21 4AVB 25 19 21 1AVB 33 20 21 2AVB 25 21 21 3AVB 30 21 21 3AVB 29 23 21 2AVB 30 23 21 4AVB 32 23 21 1AVB 32 23 21 2AVB 32 23 21 4AVB 27 24 21 3AVB 24 26 21 1AVB 24 26 21 2AVB 29 26 21 1AVB 24 27 21 4AVB 8
28 21 4AVB 25 28 21 3AVB 24 29 21 1AVB 29 29 21 4AVB 25 30 21 2AVB 24 32 21 4AVB 26 32 21 4AVB 29 33 21 1AVB 44 36 21 3AVB 34 40 21 2AVB 44 40 21 2AVB 39 41 21 3AVB 41 42 21 1AVB 40 49 21 1AVB 42 49 21 2AVB 39 54 21 2AVB 21 56 21 1AVB 23 64 21 1AVB 41 69 21 1AVB 41 69 21 3AVB 9
70 21 4AVB 31 71 21 1AVB 15 74 21 3AVB 11 75 21 1AVB 27
BQW E01 51M[} LOCATION REMARKS 23 9
22 3AVB 30 12 22 1AVB 23' 13 22 4AVB 25 13 22 2AVB 23 16 22 3AVB-25 16 22 4AVB
-16 19 22 3AVB l
16 19 22 4AVB-1 33 19 22 1AVB 24 20
.22 3AVB-25 20 22 2AVB
'23 21 22 1AVB 25 23 22 3AVB 29 24 22 4AVB 18 28 22 3AVB 24 29 22 3AVB-
-24 31 22 3AVB i
24 ~31 22 4AVB 25 31 22 1AVB j
26 33 22 2AVB 29 33 22 2AVB i
30 33 22 2AVB 21 35 22 4AVB 23 35 22 2AVB 31 35 22 2AVB 42 50 22 1AVB 19 59 22 l4AVB 8
65 22 1AVB 39 65 22 1AVB 16 72 22 2AVB 32 74 22 1AVB 11 75 22
'4AVB 22 88 22 2AVB 13 92 22 1AVB 23 9
23 2AVB 25 12 23 4AVB 30 12 23 3AVB i
23 13 23 1AVB 23 13 23 2AVB 30 13 23 2AVB 23 16 23 4AVB 32 16 23 4AVB 22 18 23 3AVB 29 18 23 2AVB 33 18 23 2AVB 17 19 23 3AVB i
22 19 23 3AVB l
l l
28 4
l E
80W [.QL %IMQ Lp4ATION REMARKS 23 19 23 2AVB 25 19 23 2AVB 17 20 23 3AVB 25 20 23 1AVB 25 20
.23 3AVB 24 21 23 1AVB 30 23 23 3AVB 20 24 23 2AVB 24 24 23 2AVB 17 ~25 23 3AVB 18 25 23 3AVB 25 25 23 2AVB 38 26 23 1AVB 23 27 23 1AVB 25 28 23 1AYB
(
25 28 23 2AVB 19 29 23 4AVB 24 29 23 2AVB 25 29 23 3AVB 26 29 23 1AVB 28 29 23 3AVB 17 30 23 2AVB 25 31 23 2AVB 25 31 23 3AVB 29 31 23 3AVB 24 32 23 3AVB 26 32 23 3AVB 30 32 23 2AVB l
28 34 23 1AVB t
11 35 23 2AVB r
l 11 35 23 2AVB 28 35 23 2AVB 39 41 23 2AVB l
26 46 23 1AVB 26 46 23 2AVB i
26 46 23 1AVB 26 46 23 2AVB 37 46 23 2AVB 19 47 23 2AVB 28 48 23 2AVB l
36 48 23 2AVB 39 49 23 1AVB 42 49 23 1AVB i
15 50 23 2AVB 25 51 23 2AVB 20 56 23 2AVB i
21 59 23 3AVB L
l 29 l
1 i
t i
RQld CDL EDg} LOCATION REMARKS 30 60 23 1AVB 31 63 23 3AVB 21 64 23 2AVB 41 68 23 1AVB 41 69 23 2AVB 33 71 23 1AVB 33 71 23 2AVB 37 73 23 4AVB 27 74 23 1AVB 16 80 23 2AVB 21 80 23 4AVB 17 7
24 2AVB 26 9
24 1AVB 25 12 24 3AVB 28 12 24 4AVB 23 13 24 3AVB 24 13 24 4AVB 17 14 24 3AVB 26 16 24 4AVB 21 18 24 3AVB 23 19 24 1AVB 24 19 24 1AVB 27 19 24 1AVB 30 20 24 1AVB 25 21 24 2AVB 27 21 24 3AVB 28 21 24 3AVB 18 23 24 3AVB 33 23 24 3AVB 17 24 24 1AVB 17 24 24 2AVB 26 24 24 2AVB 40 24 24 1AVB 24 27 24 1AVB 24 27 24 3AVB 26 27 24 1AVB 24 28 24 3AVB 26 28 24 3AVB 19 29 24 2AVB 26 29 24 2AVB 27 29 24 3AVB 29 29 24 1AVB 1
29 29 24 3AVB 29 31 24 1AVB 33 31 24 1AVB 25 33 24 1AVB 26 33 24 3AVB 30 1
RQW EDL XIWQ LOCATION REMARKS 27 33 24 3AVB 20 36 24 1AVB 35 39 24 2AVB 40 39 24 2AVB 44 39 24 1AVB 12 46 24 4AVB 41 50-24 1AVB 35 52 24 1AVB 16 59 24 3AVB 34 62 24 2AVB 28 66 24 2AVB 22 69 24 2AVB 12 71 24 1AVB 31 71 24 2AVB 15 73 24 2AVB 19 73 24 1AVB 38 74 24 2AVB 21 00 24 2AVB 15 7
25 1AVB 27 12 25 3AVB 24 13 25 2AVB 30 13 25 1AVB 23 16 25 2AVB 25 17 25 2AVB 24 19 25 2AVB 29 20 25 1AVB 30 20 25 2AVB r
22 21 25 3AVB 29 23 25 3AVB 33 23 25 2AVB 35 23 25 3AVB 29 24 25 3AVB i
34 26 25 3AVB 24 27 25 2AVB 26 27 25 2AVB 23 28 25 2AVB 24 28 25 1AVB 24 28 25 2AVB 26 28 25 1AVB 19 29 25 3AVB 35 31 25 2AVB' 32 34 25 1AVB 21 35 25 3AVB 34 36 25 1AVB i
44 36 25 2AVB 41 37 25 1AVB 17 38 25 2AVB I
31 L.
~ 1/
. g RQW C.QL' 11WQ LOCATION REMARKS 39 41 25 1AVB 43 49 25 1AVB 10 50 25 1AVB 41 54 25 3AVB 38 66 25 2AVB 24 69 25 2AVB 31 70 25 2AVB 18 73 25 3AVB 32 74 25 2AVB 22 85 25 1AVB 22 88 25 3AVB 23 8
26 2AVB 25 12 26 1AVB 24 13 26 1AVB 25 13 26 1AVB l
23 15 26 1AVB l
18 20 26 3AVB 23 21 26 1AVB 24 21 26 2AVB 27 23 26 3AVB 23 28 26 3AVB 26 29 26 3AVB 27 31 26 3AVB 29 31 26 2AVB 27 32 26 1AVB 28 34 26 2AVB 36 35 26 1AVB 8
61 26 1AVB 32 67 26 1AVB 12 71 26 4AVB 22 80 26 1AVB 26 83 26 2AVB 11 90 26 1AVB 18 90 26 3AVB l
23 8
27 1AVB 23 9
27 1AVB 25 13 27 4AVB 27 14 27 2AVB l
23 16 27 1AVB 25 16 27 2AVB 26 16 27 1AVB 29 20 27 2AVB 33 23 27 1AVB 32 24 27 2AVB 26 28 27 2AVB 19 29 27 1AVB i
25 29 27 1AVB r
32 1
e i
BQM [QL %IWQ LOCATION REMARKS 25 29 27 2AVB 34 37 27 1AVB 19 48 27 4AVB 19 49 27 1AVB 17 73 27 2AVB 17 73 27 3AVB 17 80 27 2AVB 30 83 27 1AVB 16 85 27 2AVB 22 8
28 3AVB 22 15 28 2AVB 25 16 28 1AVB 26 16 28 2AVB 32 16 28 1AVB 29 21 28 3AVB 32 23 28 3AVB 29 24 28 1AVB 29 24 28 2AVB 32 24 28 3AVB 23 28 28 1AVB 29 29 28 2AVB 21 35 28 1AVB 40 39 28 1AVB 30 72 28 2AVB 31 78 28 2AVB 21 89 28 3AVB 24 13 29 3AVB 32 24 29 1AVB 35 37 29 2AVB
.42 37 29 1AVB 44 37 29 1AVB 34 38 29 1AVB 25 12 30 2AVB 25 13 30
-3AVB 27 15 30 2AVB 32 16 30 2AVB 44 36 30 1AVB 34 38 30 2AVB 16 54 30 2AVB 12 39 31 2AVB 35 32 32 1AVB 33 35 32 2AVB 43 37 32 1AVB 35 39 32 1AVB 29 14 33 2AVB 33
~
.: i 2.
The following tubes were not properly supported by AVB or are adjacent to a plugged tube that is not properly supported by AVB.
These tubes were plugged with mechanical plugs on the hot leg side and with Sentinel' plugs on the cold leg side.
HQg [QL REASON f M RKS 10 2
AVB PLUGGED 11 2
AVB PLUC '50 11 3
AVB PLU5 10 l
12 3
AVP PLUGGED 13 3
AVB PLUGGED 9
21 AVB PLUGGED 9
30 AVB PLUGGED 9
34 AVB PLUGGED 9
44 AVB PLUGGED 10 93 AVB PLUGGED 11 93 AVB PLUGGED 12 93 AVB PLUGGED 3.
The following tubes were plugged based on eddy current indications after post heat treatrent.
R0W [0L $LWQ REMARKS I
7 33 ET PLUGGED 19 33 ET PLUGGED 12 34 ET PLUGGED 28 34 ET PLUGGED 11 35 ET PLUGGED 26 46 ET PLUGGED l
4.
The following tubes were plugged based on distorted ir.dications (DI) at the tube support plate: which were detected using the standard bobbin probe and confirmed using the RPC probe. A percent through wall depth (%
l TWD) of penetration could not be determined.
R0W [0L %TWD LOCATION REMARKS 16 35 DI 1H PLUGGED 39 35 DI IH PLUGGED 15 48 DI IH PLUGGED 34
- ~.. - - -
5.
^The following tubes were plugged based on possible indications (PI) in the vicinity of the tube sheet or tube support plates which were detected using the 8xl probe and verified using the RPC probe.
A percent through wall depth (% TWD) of penetration could not be determined.
BQM, CQL %IWQ LOCATION REMARKS 12 21 PI HTS PLUGGED 12 26 PI CTS PLUGGED 13 12 6 PI CTS PLUGGED 22 37 PI IH PLUGGED 13 45 PI CTS PLUGGED 15 49 PI HTS PLUGGED 15 50 PI IH PLUGGED 3
58 PI 2H PLUGGED 2
59 PI 3H PLUGGED 29 70 PI 1H PLUGGED 8
77 PI HTS PLUGGED 4
79 PI HTS PLUGGED 6.
The following tube was plugged because it would not pass an 8x1 probe.
R0W [QL REASON REMARKS 45 54 RESTRIC.
PLUGGED 7.
The following tubes were plugged based on tubesheet indications (TI) which were detected using the standard bobbin probe and confirmed using the RPC probe. A percent through wall depth (% TWD) of penetration could not be determined.
R0W CQL %TWD LOCATION REMARKS 9
25 TI CTS PLUGGED 11 25 TI CTS PLUGGED 44 33 TI CTS PLUGGED 23 48 TI CTS PLUGGED 19 62 TI CTS PLUGGED 35
E NORTH ANNA UNIT 1 TUBE-RUPTURE OUTAGE - JULY 1987 STEAM GENERATOR "C" EXAMINATION
SUMMARY
In "C" Steam Generator, as a minimum, those areas of tubing not examined during the previous outage (April, 1987) were exarained during this outage.
The scope of the tube examinations during the outage is described in Section VI.D.1 of the "North Anna Unit 1 July 15,1987 Steam Generator Tube Rupture Event Report," September 15, 1987, Revision 1, which was submitted by Virginia Electric and Power Company letter dated September 15, 1987 (Serial No.
87-474A).
22 tubes were found to have discontinuity indications less than 20%
through wall (%TWD). 30 tubes were found'to have discontinuity indications
- between 20% and 40% through wall. (%TWD).
7 tubes were found to have l
discontinuity indications greater tha,n 40% through wall (%TWD).
A total of 109 tubes were plugged. Refer to the table below for details.
1.
The following is a list of tubes with eddy current indications.
R0W- [_0L %T.WQ LOCATION REMARKS Q
24 12
<20 1AVB 19 14
<20 3AVB 26 14
<20 1AVB 13 19
<20 1AVB 13 19
<20 3AVB l
37 20
<20 1AVB 17 22
<20 4AVB 35 22
<20 3AVB 22 23
<20 3AVB 28 23
<20
-2AVB 32' 23
<20 2AVB 18 23
<20 3AVB 26 24
<20 2AVB 34 24
<20 2C 32 35
<20
'lAVB i
31 53
<20 HTS 21 57
<20 HTS 12 58
<20 3AVB 23 65
<20 3AVB 25 67
<20 3AVB 31 67
<20 HTS 9
70
<20 2AVB 36
BQH C_QL 7JXQ. LOCATIM BMA_Elgi 14 70
<20 1AVB.
12 11 20 2AVB 22 11-20 3AVB 211 12 20 3AVB 22 12 20 3AVB 30 65 20 2AVB 23 11 21 1AVB 30 12 21 2AVB 39 26 21 2AVB 38 27 21 3AVB 17 45 21 2AVB 19 45 21-2AVB 19 45 21 4AVB 29 48 21 4AVB 28 76 21 4AVB 17 5
22 3AVB 14 8
22 1AVB 28 40 22 HTS 17 45 22 4AVB 43 58 22 1AVB 30 83 22 1AVB 17 9
23 3AVB 20 9
23 4AVB 19 23 23 1C-2C 27 76 23 3AVB 16 9
24 3AVB 20 9
24 2AVB l
20 10 24 2AVB l
12 11 25 3AVB 27 40 25 1AVB 23 11 26 3AVB 42 46 26 1C-2C 26 14 27 2AVB 28 19 30 3AVB l
34 51 30 3AVB 10 51 37 7C PULLED / PLUGGED 5
31 50 CTS PLUGGED 15 30 51 CTS PLUGGED 9
27 55 CTS PLUGGED l
5 32 59 CTS PLUGGED 20 38 77 CTS PLUGGED 4
29 81 CTS PLUGGED 9
51 100 7C PLUGGED 37 I
L 1
U 2.
The following tubes were not properly supported by AVB or are adjacent to a plugged tube that is not properly supported by AVB.
These tubes were plugged with mechanical plugs on the hot leg side and with Sentinel plugs on the cold leg side.
HQW CQL REASON REMARKS 10 2
AVB PLUGGED 11 2
AVB PLUGGED 12 2
AVB PLUGGED 1
10 3
AVB PLUGGED 10 4
AVB PLUGGED 10 5
AVB PLUGGED 10 6
AVB PLUGGED 9
15 AVB PLUGGED 9
17 AVB PLUGGED 10 18 AVB PLUGGED 9
19 AVB PLUGGED 10 19 AVB PLUGGED 10 20 AVB PLUGGED 10 22 AVB PLVGGED 10 23 AVB PLUGGED 9
24 AVB PLUGGED 10 24 AVB PLUGGED 11 24 AVB PLUGGED 9
25
'AVB PLUGGED 10 25 AVB PLUGGED 11 25 AVB PLUGGED 10 26 AVB PLUGGED 11 26 AVB PLUGGED 10 27 AVB PLUGGED 9
28 AVB PLUGGED 10 28 AVB PLUGGED 10 29 AVB PLUGGED 9
30 AVB PLVGGED 10 30 AVB PLUCGED 11 30 AVB PLUGGED 9
31 AVB PLUGGED 10 31 AVB PLUGGED 11 31 AVB PLUGGED 10 32 AVB PLUGGED 11 32 AVB PLUGGED 9
37 AVB PLUGGED 9
42 AVB PLUGGED 9
44 AVB PLUGGED 9
45 AVB PLUGGED 10
^5 AVB PLUGGED 9
46 AVB PLUGGED 10 46 AVB PLUGGED 38
-p.
-ROW [QL. REASON REMARKS 9
47 AVB PLUGGED 10 47 AVB PLUGGED
~10 48 AVB PLUGGED 9
49-AVB PLUGGED 8
50 AVB PLUGGED 9 '50 AVB PLUGGED 10 50 AVB PLUGGED 11 50 AYB PLUGGED 12 50 AVB PLUGGED i
8 51 AVB PLUGGED i
12 51 AVB PLUGGED 8
52 AVB PLUGGED 9
52 AVB PLUGGED 10 52 AVB PLUGGED 11 52 AVB PLUGGED 12 52 AVB PLUGGED 9
56 AVB PLUGGED 9
61 AVB PLUGGED 9
63 AVB PLUGGED 9
64 AVB PLUGGED 9
65 AVB PLUGGED 9
66 AVB PLUGGED 9
67 AVB PLUGGED 9
68 AVB PLUGGED 9
75 AVB PLUGGED 10 93 AVB PLUGGED 11 93 AVB PLUGGED 12 93 AVB PLUGGED l
3.
The following tubes were plugged based on distorted indications (DI) at the tube support plates which were detected using the standard bobbin j
probe and confirmed using the RPC probe. A percent through wall depth (%
l TWD) of penetration could not be determined.
l R0W CQL %TWD LOCATION REMARKS l
4 3
DI 2H PLUGGED 9
32 DI 7C PLUGGED l
11 51 DI IH PLUGGED l
11 51 DI 1H PLUGGED l
16 71 DI 2H PLUGGED 39 l
l
+
4.
The following tubes were plugged based on possible~ indications (PI) in the vicinity of the tube sheet or tube support plates which were detected using the 8x1 probe and verified using the RPC probe.
A percent through wall depth (% TWD) of penetration could not;be determined.
fL0W- [0L KIRQ LOCATION REMARKS 0
4 8
PI 3H PLUGGED 37 25 PI IH PLUGGED 12 29 PI HTS PLUGGED 22 31 PI
. HTS PLUGGED 21 32 PI HTS PLUGGED 19 34 PI HTS PLUGGED 24 47 PI HTS PLUGGED 32 47 PI HTS PLUGGED 11 48-PI 1H PLUCGED 46 49 PI 3H PLUGGED 46 49 PI 4H PLUGGED 5.
The following tubes were plugged because they would not pass an 8x1 probe.
R0W LQL REASON REMARKS 42 41 RESTRIC.
PLUGGED 2
54 RESTRIC.
PLUGGED 45 54 RESTRIC.
PLUGGED 6.
The following tubes were plugged based on tubesheet indications (TI) which were detected using the standard bobbin probe and confirmed using the RPC probe. A percent through wall depth (% TWD) of penetration could not be determined.
R0W COL %TWD LOCATION REMARKS 4
28 TI CTS PLUGGED 9
32 TI HTS PLUGGED 13 36 TI HTS PLUGGED 13 40 TI HTS PLUGGED 12 41 TI HTS PLUGGED 11 43 TI HTS PLUGGED 12 43 TI HTS PLUGGED 13 43 TI HTS PLUGGED 13 44 TI HTS PLUGGED 14 44 TI HTS PLUGGED 13 46 TI HTS PLUGGED 13 47 TI HTS PLUGGED 40
O 7
R0W COL %TWD LOCATION REMARKS 14 47 TI HTS PLUGGED 13 48 TI HTS PLUGGED 31 49 TI HTS PLUGGED l
l l
I 1
l 41
VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA NUCLEAR POWER STATION UNIT N0. 2 1987 ANNUAL STEAM GENERATOR INSERVICE. INSPECTION REPORT EDDY CURRENT EXAMINATION During 1987 the steam generator tubes were examined once.
This examination occurred during the August refueling outage.
Tubes in all three steam generators were examined during the outage.
The material that follows presents the results of the examinations.
These results include the number and extent of the tubes inspected, the location and percent of wall-thickness penetration for each indication of an imperfection, and the identification of the tubes that were plugged.
Also included are a "Tubesheet Cross Section Plot" (Figure It and "Tube Support Plate /Tubesheet Nomenclature" (Figure 2).
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NORTH ANNA UNIT 2 REFUELING OUTAGE - AUGUST 1987 STEAM GENERATOR "A" EXAMINATION
SUMMARY
In "A" Steam Generator there were 3291 tube examinations from the inlet side.
All 3291 tube examinations were full length (tubesheet to tubesheet).
This is approximately 100 percent of the available tubes.
4 tubes were found to have discontinuity indications less than 20% through wall.
18 tubes were found to have discontinuity indications between 20% and 40% through wall (%TWD).
6 tubes were found to l,,;.e discontinuity indications greater than 40% through wall (%TWD).
A total of 54 tubes were plugged.
Refer to the table below for details.
1.
The following is a list of tubes with eddy current indications.
R0W @0L %IWQ LOCATION REMARKS 18 6
<20 IC 44 35
<20 1H 36 49
<20 1AVB 17 91
<20 HTS-lH 34 45 21 3AVB 35 47 22 2AVB 35 47 22 4AVB 35 49 22 3AVB 37 68 22 3AVB 36 46 24 2AVB 36 49 24 4AVB 29 51 24 2AVB t
34 79 24 2C l
23 44 25 4AVB 42 31 26 2C 33 42 26 1AVB 29 57 26 2AVB 35 50 28 2AVB 36 68 28 3AVB 17 91 28 HTS 35 50 31 3AVB 36 53 31 2AVB 31 81 33 2C 30 59 34 3AVB 43
BQM [QL' %_IMQ -LOCATION -REMARKS 14 42 35 HTS PLUGGED 29 81 35 2C PLUGGED 36 49 36' 3AVB PLUGGED-
.17 91 40~
HTS PLUGGED 26 85 41 1C PLUGGED 38 73 43 1C PLUGGED 35 77 43 2C PLUGGED 36 49 44 2AVB PLUGGED 14 42 45 HTS PLUGGED 34 79 47 3C PLUGGED 2.
The following tubes were not properly supported by AVB or are adjacent to a plugged tube that is not properly supported by AVB.
These tubes were plugged with mechanical plugs on the hot leg side and with Sentinel plugs on the cold leg side.
R0W COL REASON REMARKS 8
3 AVB PLUGGED L
8 4
AVB PLUGGED l
9 10 AVB PLUGGED 9
11 AVB PLUGGED 9
12 AVB PLUGGED 9
13 AVB PLUGGED 9
14 AVB PLUGGED 9
15 AVB PLUGGED 9
16 AVB PLUGGED l
9 35 AVB PLUGGED l
9 40 AVB PLUGGED l
9 41 AVB PLUGGED 1
9 42 AVB PLUGGED l
9 43 AVB PLUGGED 9
44 AVB PLUGGED 9
45 AVB PLUGGED 9
46 AVB PLUGGED 9
47 AVB PLUGGED 9
48 AVB PLUGGED 9
49 AVB PLUGGED 9
50 AVB PLUGGED 9
51 AVB PLUGGED 9
52 AVB PLUGGED 9
53 AVB PLUGGED 9
54 AVB PLUGGED 9
55 AVB PLUGGED 9
60 AVB PLUGGED 44
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RQM LQL REASON REMARKS
~
10 '60 AVB PLUGGED 9
61 AVB PLUGGED 9
62 AVB PLUGGED L
9 63 AVB PLUGGED 9
66 AVB PLUGGED 9
70 AVB PLUGGED 9
71-AVB PLUGGED 9
77 AVB PLUGGED 9L 78 AVB PLUGGED 9
79 AVB PLUGGED 9
80 AVB PLUGGED 9
81 AVB PLUGGED 9
82 AVB PLUGGED 9
83 AVB PLUGGED 9
84 AVB PLUGGED 9
85 AVB PLUGGED j
8 91 AVB PLUGGED i
8 92 AVB PLUGGED l
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NORTH ANNA UNIT 2 REFUELING OUTAGE - AUGUST 1987 STEAM GENERATOR "B" EXAMINATION
SUMMARY
In "B" Steam Generator there were 3293 tube examinations from the inlet side.
All 3293 ube examinations were full length (tubesheet to tubesheet). This is approximately 100 percent of the available tubes.
10 tubes were found to have discontinuity indications less than 20% through wall (%TWD).
9 tubes were found to have discontinuity indications between 20% and 40% through wall
(%TWD). _2 tubes were found to have discontinuity indications greater than 40%
through wall (%TWD).
A total of 35 tubes were plugged.
Refer to the table below for details.
1.
The following is a list of tubes with eddy current indications.
R0W 201 Z,JyD LOCATION REMARKS 7
1
<20 1C 26 10
<20 1C 27 10
<20 1C 25 28
<20 1AVB 44 48
<20 1C 45 50
<20 1C 12 77
<20 6C-7C 15 77
<20 CTS-1C 28 83
<20 1C 17 90
<20 1C 39 48 23 4AV8 39 52 23 2AVB 35 21 25 4AVB 39 49 25 3AVB 21 63 25 4AVB 29 58 27 4AVB 39 45 28 3AVB 39 49 28 2AVB 39 50 29 1AVB 39 48 31 3AVB l
17 29 32 2AVB 39 49 32 1AVB 39 39 34 3AVB PLUGGED 39 50 36 2AVB PLUGGED l
46 l
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R0W QQL $1MD LOCATION REMARKS 10 22 85 HTS PLUGGED 10 22 97 HTS PLUGGED 2.
The following tubes'were not properly supported by AVB or are adjacent to a plugged tube that is not properly supported by AVB.
These tubes were plugged with mechanical plugs on the hot leg side and with Sentinel plugs on the cold leg side.
BQW CDL REASON REMARKS 8
3 AVB PLUGGED 8
4 AVB PLUGGED 9
14 AVB PLUGGED 9
15 AVB PLUGGED 9
19 AVB PLUGGED 9
31 AVB PLUGGED 9
33 AVB PLUGGED 9
34 AVB PLUGGED 9
35 AVB PLUGGED 9
40 AVB PLUGGED 9
41 AVB PLUGGED 9
42 AVB PLUGGED 9
43 AVB PLUGGED 9
44 AVB PLUGGED 9
45 AVB PLUGGED 9
46 AVB PLUGGED 9
47 AVB PLUGGED l
9 48 AVB PLUGGED 9
49 AVB PLUGGED 9
50 AVB PLUGGED 9
51 AVB PLUGGED 9
52 AVB PLUGGED 9
53 AVB PLUGGED 9
54 AVB PLUGGED 9
60 AVB PLUGGED 8
91 AVB PLUGGED 8
92 AVB PLUGGED 9
92 AVB PLUGGED 9
93 AVB PLUGGED l
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3.
.The following tubes surround 'a lodged foreign object on the secondary side and were plugged with mechanical plugs.*
B0M CHL REASDH REMARKS 32 79 OBJECT PLUGGED 33 79 OBJECT.
PLUGGED
- Continued operation with this foreign object remaining in the steam generator was evaluated by the vendor and approved by the Station Nuclear Safety and Operating Committee.
4.
The following tube was plugged based on possible indications (PI) in the vicinity. of the tube sheet or tube support plates which were detected using the 8x1 probe and verified using the RPC probe.
A percent through wall depth (% TWD) of penetration could not be determined.
R0W COL INDIC.
LOCATION REMARKS 6
17 PI HTS PLUGGED l
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-s N0RTH ANNA' UNIT 2 REFUELING OUTAGE - AUGUST 1987 STEAM GENERATOR "C" EXAMINATION
SUMMARY
In "C" Steam Generator there were 3286 tube examinations. from the inlet side.
All 3286 tube examinations were full length (tubesheet to tubesheet).
This is i
approximately 100 percent of the available tubes. 3 tubes were found to have discontinuity indications less than 20% through wall.
18 tubes were found to have discontinuity indications between 20% and 40% through wall -(%TWD).
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tubes were found t6 have discontinuity indications greater than 40% through wall (%TWD). A total of 66 tubes were plugged.
Rafer to the table below for details.
1.
The following is a list of tubes with eddy current indications.
80M @01 7sIWD LOCATIQH REMARKS 43 33
<20 2C 40 59
<20 HTS-lH 34 69
<20 1AVB 6
93 20 IC 8
2 22 3C 45 43 23 1C 27 51 23 4AVB 17 53 24 3AVB 44 56 27 1C 37 21 29 2C 38 58 29 4AVB 40 60 29 2AVB 29 48 31 2AVB 6
1 32 1C 6
3 32 1C 41 56 33 3AVB 38 58 35 3AVB PLUGGED 23 8
36 2C PLUGGED 29 84 36 1C PLUGGED 24 9
38 1C PLUGGED 9
3 39 1C PLUGGED 40 27 40 1C PLUGGED 45 37 41 1C PLUGGED 20 6
42 1C PLUGGED 37 57 42 4AVB PLUGGED 49 I
t 4
2 a
R0W [QL: 5IMD LOCATION REMARKS 41 56 43 2AVB PLUGGED 37 57 44
'3AVB PLUGGED 37 73 45.
2C PLUGGED
!=
43 31 52 2C PLUGGED 23 8
53 1C PLUGGED 39 25 60 1C PLUGGED 30 14 62 1C PLUGGED 41 49 82 lits PLUGGED 3
46 94 lH PLUGGED 2.
The following tubes were not properly supported by AVB or are adjacent to a-plugged tube that is not properly supported by AVB.
These tubes were plugged with mechanical plugs on the hot leg side and with Sentinel plugs on the cold leg side.
R0W [QL REASON REMARKS 9
35 AVB PLUGGED 10 35 AVB PLUGGED 9-39 AVB PLUGGED 9
40 AYB PLUGGED 9
41 AVB PLUGGED 9
42 AVB PLUGGED 10 42 AVB PLUGGED 9
43 AVB PLUGGED 10 43 AVB PLUGGED l
9 44 AVB PLUGGED 10 44 AVB PLUGGED 9
45 AVB PLUGGED 10 45 AVB PLUGGED 9
46 AVB PLUGGED i
10 46 AVB PLUGGED l
9 47 AVB PLUGGED 10 47 AVB PLUGGED 9
48 AVB PLUGGED 9
49 AVB PLUGGED 10 49 AVB PLUGGED 1
9 50 AVB PLUGGED 10 50 AVB PLUGGED 9
51 AVB PLUGGED 9
52 AVB PLUGGED 9
53 AVB PLUGGED 10 53 AVB PLUGGED l
9 54 AVB PLUGGED i
50
B0W CQL REASON REMARKS 0
9 55 AVB PLUGGED 9
56 AVB PLUGGED-10 56 AVB PLUGGED
-9 57 AVB PLUGGED 9
60 AVB PLUGGED 10 60 AVB
- PLUGGED
'9 61 AVB PLUGGED 9
62 AVB PLUGGED 9
79
-AVB PLUGGED 9
80 AVB PLUGGED 9
81
-AVB~
PLUGGED 9
82 AVB PLUGGED 9
83 AVB PLUGGED 9
84 AVB PLUGGED 9
85 AVB PLUGGED 8
91 AVB PLUGGED 8
92 AVB PLUGGED 3.
The following tubes were found to be leaking and were plugged.
R0W LQL REASON REMARKS 2
65 LEAKER PLUGGED 2
66 LEAKER PLUGGED 2
68 LEAKER PLUGGED 2
93 LEAKER PLUGGED 2
94 LEAKER PLUGGED l
4.
The following tube was plugged based on possible indications (PI) in the l
vicinity of the tube sheet or tube support plates which were detected using the 8x1 probe and verified using the RPC probe.
A percent through I
wall depth (% TWD) of penetration could not be determined.
R0W CQL INDIC.
LOCATION REMARKS l
17 10 PI HTS PLUGGED i
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FIGURE 2
Tube Support Plate /Tubesheet Nomenclature l
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l 2AVB 3AVB 1AVB 4AVB 7H
-70 III II 6H -
~60 l
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SH 50 l
lil ll 4H 40 lil ll 3H 3C lil ll 2H 2C lll l
ll 10 HTS Westinghouse l
Series 51 Inlet Outlet F
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a VIRGINIA ELECTRIC ann Powan CO)IPANY HICitMOND,VI HOINIA 2 0 0 61 March 1, 1988 w.L.srmw ur Vaca Psamannwr NocLaAa OrsaATIONE United States Nuclear Regulatory Commission Serial No.88-084 Attention:
Document Control Desk N0/FPB Washington, D.C.
20555 Docket Nos.
50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen:
VIRGINIA ELECTRIC AND POWER CONPANY NORTH ANNA POWER STATION UNITS 1 AND 2 1987 ANNUAL STEAN GENERATOR INSERVICE INSPECTION REPORT In accordance with the provisions of North Anna Technical Specifications 4.4.5.5.b and 6.9.1.4, attached is the Steam Generator Inservice Inspection Report for North Anna Power Station Units 1 and 2 for 1987.
As required by Technical Specification 4.4.5.5.a, summaries of tubes plugged in the May refueling outage for Unit 1, the July steam generator tube rupture outage for Unit 1, and the August refueling outage for Unit 2 were submitted by letters dated July 10, 1987, October 26, 1987 and November 13, 1987, respectively.
Very truly yours, W. L. Stewart
Attachment:
Virginia Electric and Power Company North Anna Power Station Unit 1 and 2 1987 Annual Steam Generator Inservice Inspection Report cc:
U. S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Suite 2900 Atlanta, GA 30323 Mr. J. L. Caldwell NRC Senior Resident Inspector North Anna Power Station
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