ML20035D614
| ML20035D614 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 03/31/1993 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20035D613 | List: |
| References | |
| NUDOCS 9304130326 | |
| Download: ML20035D614 (17) | |
Text
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ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 5 INSPECTION APRIL 1992 STEAM GENERATOR TUBING INSPECTION RESULTS (WO3 930305 834) i 9304130326 930331 PDR ADOCK 05000328 PDR G
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t SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 5 INSPECTION APRIL 1992
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-i STEAM GENERATOR (S/G) TUBING INSPECTION RESULTS i
i TABLE OF CONTELES i
Table 1 - Inspection Summary I
Table 2 - S/G 1 Inspection Summary
{
t Table 3 - S/G 2 Inspection Summary
{
f Table 4 - S/G 3 Inspection Summary i
Table 5 - S/G 4 Inspection Summary l
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Table 6 - Indications Table 7 - Plugged Tube Summary i
Table 8 - Nomenclature j
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0 3239q
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Table l' SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 5 INSPECTION APRIL 1992 JESPECTION
SUMMARY
S/G 1 S/G 2 S/G 3 ELG_i Total tubes examined 2968 3288 3292 2461 1;bes recording defects 3
16 11
-2 (140% wall loss)
Tubes recording degradations 9-20 6
4 (1 0% to <40% wall loss) 2 Tubes recording irnperfections 17 16 6
7
(<20% wall loss) 3239q D
... =. _
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' Table 2
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SEQUOYAH NUCLEAR PLANT UNIT'2 i
CYCLE 5 INSPECTION i
APRIL 1992 i
S/G 1 I.FSPECTION
SUMMARY
Number of Tubes General defect examinations [ Extent (Probe Type)]
-i Full length (bobbin coil) - tube end to tube end 1713
.j Partial length (bobbin coil) -
tubesheet to opposite tube end 19 Partial length (bobbin coll) - hot leg and U-bend 2
Partial length (bobbin coil) - cold leg 71-Specialty examinations [ Extent (Probe Type))
Hot leg top of tubesheet (RPC) 1838 Support plate ints'tsection.(RPC) 311 i
U-bend (RPC) 94 i
Total Number of Tubes Examined
'2968 Indisations Number of Tubes j
Tubes recording defects 3
[
(1 0% wall loss) 4 Tubes recording degradations 9
(120% to <40% wall loss) 2 Tubes recording imperfections 17
(<20% wall loss) i I
4
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3239q f
Table 3 SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 5 INSPECTION APRIL 1992
}
S/G 2 INSPECTION
SUMMARY
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=2 Number of Tubes General defect examinations { Extent (Probe Type)]
Full length (bobbin coll) - tube end to tube end 1934
'j Partial le"-
. (bobbin coll) -
tubesheet to opposite tube end 37 Partial length (bobbin coll) - hot leg and U-bend 1
i Partial length (bobbin coll) - cold Jeg 68 1
i Specialty examinations [ Extent (Probe Type)]
1' Hot leg top of tubesheet (RPC) 3288
?
l Support plate intersection (RPC) 300 U-bend (RPC) 94 Total Number of Tubes Examined 3288 t
i 1Ddications Number of Tubes
.' i Tubes recording defects 16 (140% wall loss) 4 Tubes recording degradations 20 l
(120% to <40% wall loss) j Tubes recording imperfections 16
(<20% wall loss) i I
i l
i 3239q n mm V
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i Table 4' i
SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 5 INSPECTION-APRIL.1992 E!G 3 INSPECTION
SUMMARY
f i
1l Number of' Tubes l
General defect examinations { Extent (probe Type)]
l Full length (bobbin 0011) - tube end to tube end 1418 j
Partial length (bobbin coll) -
tube sheet to opposite tube end 5
Partial length (bobbin coil) - cold leg 52 i
Specialty examinations { Extent (Probe Type)]
l Hot leg top of tubesheet (RPC) 3292
.i Support plate intersection (RPC) 214 f
U-bend (RPC) 93' l
I Iotal Number of Tuhes Examined 3292 l
I
.i Indications Number of Tubes l
l T
Tubes recording defects 11 (140% wall loss) l Tubes recording degradations 6
[
(220% to <40% wall loss) f t
Tubes recording imperfections
-6
(<20% wall loss) f i
)
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3239q l
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o Table 5 SEQUOYAH NUCLEAR PLANT UNIT 2 V
CYCLE 5 INSPECTION APRIL 1992
'i
-f S/G 4 INSPECTION
SUMMARY
l Number of Tubes General defect examinations [ Extent (Probe Type))
'f Full length (bobbin coil) - tube end to tube end 1321 i
i Partial length (bobbin coil) -
tubesheet to opposite tube end 12 Partial length (bobbin coil) - cold leg 53 Specialty examinations [ Extent (Probe Type)]
f Hot leg top of tubesheet (RPC) 1433 l
i i
Support plate intersection (RPC) 216
.j U-bend (RPC) 94 I
Iotal Number of Tubes Examintd 2461 Indications
~!
Tubes recording defects 2
l (1 0% wall loss) 4 Tubes recording degradations 4
l (2 0% to (40% wall lose) l 2
Tubes recording imperfections 7
(<20% wall loss) i I
f 3239q
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Table 6
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SEQUOYAH NUCLEAR PLANT UNIT 2
.f CYCLE 5 INSPECTION APRIL 1992 INDICATIONE
]
S/G 1
{
Eng cal Location
% Thru-Wall Characterization Resolution Exem Scope INITIAL SAMPLE
- t 3
~
l 8
54 HTS - 0.57 SAI PWSCC-AXIAL PLUG TUBE 1397 BC
-i 10 57 CTS +46.61 10 MFG FLAW (2) 1430 RPC-HTS 20 58 H07 + 0.09 6
ODI (2) 311 RPC-H01
'}
25 10 CTS + 8.76 10 MFG FLAW (2) 94 RPC-U/B 26 52 H02 +35.58 18 MFG FLAW (2) 32 64 AV2 + 0.0 21 AVB WEAR (1) l AV4 + 0.0 17 AVB WEAR f
33 44 AV2 + 0.0 12 AVB WEAR (2) 4 33 51 AV2 + 0.0 32 AVB WEAR (1) 33 56 AV3 + 0.0 44 AVB WEAR PLUG TUBE 33 57 AV2 + 0.0 34 AVB WEAR (1)
I AV3 + 0.0 34 AVB WEAR
'3 58 AV2 + 0.0 42 AVB WEAR PLUG TUBE AV3 + 0.0 42 AVB WEAR I
AV4 + 0.0 35 AVB WEAR
[
33 59 AV1 + 0.0 30 AVB WEAR (1)
AV3 + 0.0 25 AVB WEAR 34 19 C01 + 0.16 8
Cold Leg WASTAGE (2) 34 47 AV1 + 0.0 25 AVB WEAR i
AV2 + 0.0 35 AVB WEAR AV3 + 0.0 39 AVB WEAR PLUG TUBE
[
AV4 + 0.0 27 AVB WEAR f
34 53 AV2'+ 0.0 34
?.VB WEAR (1)
[
AV3 + 0.0 26 AVB WEAR 35 75 C04 +17.98 10
. MFG FLAW (2) 36 62 H05 +21.79 8
MFG FLAW (2) 37 21 CTS +34.98 11 MFG FLAW (2) 37 62 AV3 + 0.0 26 AVB WEAR (1)
L 38 42 HTS 440.0f 12 MFG FLAW (2)
L HTS +32.99 10 MFG FLAW 40 26 H05 +45.42 7
MFG FLAW (2) 42 62 HTS +13.28 10 MFG FLAW (2) 44 34 C01 + 0.0 18 Cold Leg WASTAGE (2)
[
46 46 C01 + 0.12 37 Cold Leg WASTAGE PLUG TUBE i
Steam Generator 1 Initial Sample Inspection results have been classified as C-2.
[
(continued on next page)
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Table 6_
j S.tOUOYAH NUCLEA.R PLANT UNIT 2 l
CYCLE 5 INSPECTION APRIL 1992 IFDICATIOJIS S/G 1 (Continued)
Egy C.nl Location
% Thru-Wall Characterization Resolution ' Exam Scope.
First Expansion SamP1R l
t 29 63 AV2 + 0.0 20 AVB WEAR (1) 408 BC l
AV3 + 0.0 31 AVB WEAR 408 RPC-HTS 34 29 H02 + 0.12 9
ODI (2) 35 71 C06 + 7.17 18 MFG FLAW (2) 36 66 AV3 + 0.0 19 AVB WEAR (2) 43 46 HTS +47.98 14 MFG FLAW (2)
Steam Generator 1 First Expansion Inspection results have been classified as C-1.
j N:tes:
(1) Reexamine during future inspections.
I ?. ) None required.
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' Table 6'
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(Continued).
SEQUOYAH NUCLEAR PLANT UNIT 2.
CYCLE 5 INSPECTION' APRIL 1992 j
INDICATIONS S/G 2 Enw Enl Location
% Thr.u:_W_all Characteri; atinn ReanlutiOD Eram Scopg l
IHIIIAL_SAMELE
.i 3
52 HTS - 0.64 SAI PWSCC-AXIAL PLUG TUBE 1632 BC 3
55 HTS - 0.51 SAI PWSCC-AXIAL PLUG TUDE 2448 RPC-HTS
-f 5
31 CO2 + 0.06 26 Cold Leg WASTAGE (2) 200 RPC-H01 I
6 93 C01 + 0.09 25 Cold Leg WASTAGE (1) 94 RPC-U/B l
8 19 HTS - 0.09 COI PWSCC-CIRC PLUG TUBE I
8 50 HTS 448.01 13 MFG FLAW (2) 8 54 UTS - 0.54 SAI PWSCC-AXIAL PLUG TUBE f
9 26 UTS - 1.42 SAI PWSCC-AXIAL PLUG TUBE 9
60 HTS - 2.49 MAI PWSCC-MULT AXIAL PLUG TUBE 11 3
C01 - 0.22 38 Cold Leg WASTAGE PLUG TUBE 12 2
H05 +25.24 12 MFG FLAW (2) t 12 67 HTS - 0.05 COI PWSCC-CIRC PLUG TUBE
(. '2 )
l 18 89 COI + 0.0 19 Cold Leg WASTAGE 20 24 H02 + 4.77 11 MFG FLAW (2) f 24 61 AV2 + 0.0 23 AVB WEAR (1) 25 45 HTS - 0.50 SAI PWSCC-AXIAL PLUG TUBE 26 12 HOI + 0.0 55 ODSCC/ IGA-AXIAL PLUG TUBE i
29 32 AV3 + 0.0 20 AVB WEAR (1)
{
AV4 + 0.0 22 AVB WEAR i
29 34 AV2 + 0.0 29 AVB WEAR AV3 + 0.0 40 AVB WEAR PLUG TUBE q
AV4'+ 0.0 18 AVB WEAR i
29 37 AV2 + 0.0 15 AVB WEAR (2) i 29 42 AV1 4 0.0 23 AVB WEAR (1)
AV2 + 0.0 22 AVB WEAR i
AV3 + 0 0 31 AVB WEAR I
AV4 + 0.0 16 AVB WEAR
{
29 56 C04 + 0.03 17 ODI (2)'
30 44 H04 + 2.90 5
MFG FLAW (2) j 30 51 HTS - 1.12 SAI PWSCC-AXIAL PLUG TUBE 31 13 C01 4 0.0 37 Cold Leg WASTAGE PLUG TUBE l
32 54 AV3 + 0.0 33 AVB WEAR (1)
{
32 55 AV1 + 0.0 20 AVB WEAR (1)
AV2 + 0.0 26 AVB WEAR
(
AV3 + 0.0 33 AVB WEAR 32 59 AV1 + 0.0 21 AVB WEAR AV2 + 0.0 42 AVB WEAR PLUG TUDE AV3 4 0.0 33 AVB WEAR (continued on next page)
(
3239q j
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Table 6 (Continued)
SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 5 INSPECTION APRIL 1992 IIM KlillOES S/G 2 (Continued)
Enw Col Lac.ation
&_Thru-Wall Char _ecterization ILesnintinn t:am Sqsps INITlAL_SMfRE (continued) 32 79 C01 + 0.0 33 Cold Leg WASTAGE (1) 33 49 AV1 + 0.0 20 AVB WEAR (1)
AV2 + 0.0 21 AVB WEAR AV3 + 0.0 30 AVB WEAR AV4 + 0.0 18 AVB WEAR 33 53 CO2 + 0.0 6
Cold Leg WASTAGE (2) 34 63 AV2 + 0.0 27 AVB WEAR (1) 34 64 AV2 + 0.0 30 AVB WEAR (1) 34 77 C01 - 0.30 39 Cold Leg WASTAGE PLUG TUBE 35 18 CO2 + 0.0 45 Cold Leg WASTAGE PLUG TUBE C01 + 0.0 33 Cold Leg WASTAGE 36 18 C01 + 0.8 19 Cold Leg WASTAGE (1) 38 24 C01 + 0.0 29 Cold Leg WASTAGE (1) 38 46 AV3 + 0.0 16 AVB WEAR (2)
AV4 4 0.0 16 AVB WEAR 39 49 AV4 + 0.0 19 AVB WEAR (2) 40 25 C01 + 0.0 22 Cold Leg WASTAGE (1) 42 31 C01 + 0.0 32 Cold Leg WASTAGE (1) 42 64 C01 4 0.0 28 Cold Leg WASTAGE (1) 42 66 C01 4 0.09 17 Cold Leg WASTAGE (1) 43 33 C01 4 0.21 57 Cold Leg WASTAGE PLUG TUBE 43 36 C01 + 0.0 57 Cold Leg WASTAGE PLUG TUBE 43 63 C01 + 0.0 26 Cold Leg WASTAGE (1) 44 33 C01 + 0.18 13 Cold Leg WASTAGE (2) 46 48 C01 + 0.17 8
Cold Leg WASTAGE (2)
Steam Generator 2 Initial Sample Inspection results have been classified as C-2.
Ei rfiLJzppnsiph%ryIn 13 79 HTS - 0.34 SAI PWSCC-AXIAL PLUG TUBE 408 BC 23 82 H06 + 0.08 33 ODI (1) 1193 RPC-HTS 24 78 C07 + 0.0 16 CDI (2) 26 70 AV3 + 0.0 31 AVB WEAR (1)
Steam Generator 2 First Expansion Inspection results have been classified as C-2.
(continued on next page) 3239q l
'I Table 6 (Continued)
SEQUOYAH NUCLEAR PLANT UNIT 2 l
CYCLE 5 INSPECTION APRIL 1992 INDICATIONS S/G 2 (Continued) l Epw fal Location
% Thru-Wall Characterization ' Resolution Exam Scope i
SRC2nd_I_xIgnsion Sample No indications.
647 RPC-HTS Steam Generator 2 Second Expansion Inspection results have been classified as C-1.
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Notes:
(1) Reexamine during future inspections.
l (2)- None Required.
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5 Table 6 (Contin-oo) l SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 5 INSPECTION i
APRIL 1992 i
INDICATIONS S/G 3
}
t i
Enx Cal Location
% Thru-Wall Characterization Resolution Exam Scope.
I Initial _S.Dmple 8
2 C01 + 0.14 26 Cold Leg WASTAGE (1)
.1068 BC 11 2
C01 + 0.03 19 Cold Leg WASTAGE (2) 1436 RPC-HTS 12 28 C05 +12.05 5
MFG FLAW (2) 214 RPC-H01 l
12 54 HTS - 0.75 SAI PW5CC-AXIAL PLUG TUBE 93'RPC-U/B j
12 61 HTS - 2.19 SAI PWSCC-AXIAL PLUG TUBE.
f 15 70 HTS - 1.09 SAI PWSCC-AXIAL PLUG TUBE' i
18 25 HTS - 0.91 SAI PWSCC-AXIAL PLUG TUBE 22 31 HTS - 0.45 SAI PWSCC-AXIAL PLUG TUBE 22 33 HTS - 2.54 SAI PWSCC-AXIAL PLUG TUBE 25 32 HTS - 2.48 SAI PWSCC-AXIAL PLUG TUBE 28 10 H04 +35.43 16 MFG FLAW (2) 30 83 CO2 + 0.0 7
Cold Leg WASTAGE (2) 32 16 Col + 0.08 28 Cold Leg WASTAGE (1)
I 32 68 H01 + 1.10 14 MFG FLAW (2) 34 43 AV2 + 0.0 26 AVB WEAR
. (1)
{
AV3 + 0.0 26 AVB WEAR AV4 + 0.0-23 AVB WEAR 34 44 AV1 + 0.0 35 AVB WEAR AV2 + 0.0 38 AVB WEAR AV3 + 0.0 43 AVB WEAR PLUG TUBE
- l 34 78 C01 - 0.14 29 Cold Leg WASTAGE (1) 35 77 C01 - 0.20 66 Cold Leg WASTAGE PLUG TUBE 36 77 C01 - 0.20 35 Cold Leg WASTAGE PLUG TUBE 44 36 CO2 + 0.0 39 Cold Leg WASTAGE PLUG TUBE C01 + 0.0 44 Cold Leg WASTAGE
{
45 36 Col + 0.0 33 Cold Leg WASTAGE (1)
Stean Generator 3 Initial Sample Inspection results have been classified as C-2.
l Eirst Expansign Sample 30 25 HTC - 0. 4 9 SAI PWSCC-AXIAL PLUG TUBE 415 BC 32 38 CTS + 3.82 18 MFG FLAW (2) 1535 RPC-HTS
- i Steam Generator 3 First Expansion Inspection results have been classified as C-2.
[
(continued on next page)
]
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3239q
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Table 6 (Continued)
SEQUOYAH NUCLEAR PLANT. UNIT 2 CYCLE 5 INSPECTION APRIL 1992 l
f INDICATIONS l
S/G 3 t
(Continued)
Eqw fal Location
% Thru-Wall Characterization Resolution Exam Scope Second Expansion Sample
-i i
No indications.
321 RPC-HTS f
Steam Generator 3 Second Expansion Inspection results have been classified as C-1.
I f
Notes:
(1) Reexamine during future inspections.
(2) None required.
t i
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3239q
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Tabic 6 1
(Continued)
SEQUOYAH NUCLEAR PLANT UNIT 2 i
CYCLE 5 INSPECTION APRIL 1992 f
INDICATIONS 5/G 4 5
Row Cql Location
% Thru-Wall Characterization Resolution Exam Scope h
initial Sample 4
1 C01 + 0.0 45 Cold Leg WASTAGE PLUG TUBE 978 BC.
14 43 HTS + 1.12 15 ODI (2)
!.433'RPC-HTS 17 20 CTS +13.7 15 MFG FLAN (2) 216 RPC-H01 l
l 38 22 CO2 + 0.0 45 Cold Leg WASTAGE PLUG TUBE 94 RPC-U/B i
43 61 CO2 - 0.27 33 Cold Leg WASTAGE (1) 44 61 C03 + 0.18 20 Cold Leg WASTAGE' (1) f 45 54 CO2 + 0.0 24 Cold Leg WASTAGE (1) 45 56 CO2 0.03 12 Cold Leg WASTI.GE (2) 45 57 CO2 - 0.15 17 Cold Leg WASTAGE (2)
Steam Generator 4 Initial Sample Inspection results have been classified as C-2.
4 First Expansion Sample
[
i 38 44 AV3 + 0.0 23 AVB WEAR (1) 408 BC 38 49 AV3 + 0.0 19 AVB WEAR (2) 38 52 AV3 + 0.0 18 AVB WEAR (2) 38 65 AV2 + 0.0 17 AVB WEAR (2)
I Steam Generator 4 First Expansion Inspection results have'been classified as C-1.
Notes:
(1) Reexar.dne during future inspections.
(2) None required.
3239q
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Table 7 F
SEQUOYAH NUCLEAR PLANT UNIT 2
.[
CYCLE 5 INSPECTION i
APRIL 1992 ELUGGED TUBE
SUMMARY
Unit S/G 1 S/G 2 S/G 3 S/G 4 TOTAL Previously Plugged Tubes 99 100 96 101 396 j
Tubes Plugged Cycle 5 by Damage Mechanism PWSCC HTS Axial 1
8 8
0 17 l
PWSCC HTS Circumferential 0
2 0
0 2
i ODSCC/ IGA TSP O
1 0
0 1
AVB Wear 3
2 1
0 6
Cold Leg Wastage 1
6 3
2 12 l
Total Plugged Cycle 5 Outage 5
19 12 2
38 l
l Total Tubes Plugged 104 119 108 103 434 i
I EQIg1 Tubes plugged due'to eddy current indications are identified in Table 6.
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Table 8 i
t SEQUOYAH NUCLEAR PLANT UNIT 2 CYCLE 5 INSPECTION i
APRIL 1992 i
llQMENCLATURE
..I Location Nomenclature for Sequoyah Nuclear Plant i
Notation Dascripilsa l
?
HTE Tube end - hot leg j
HTS Top of tubesheet - hot leg
'I H01 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 l
H06 Sixth support plate - hot leg j
H07 Seventh support plate - hot leg l
AV1 First anti-vibration bar above H07 AV2 Second anti-vibration bar above H07 AV3 Second anti-vibration bar above C07
[
AV4 First anti-vibration bar above C07 C07 Seventh support plate - cold leg C06 Sixth support plate - cold leg
[
C05 Fifth support plate - cold leg l
C04 Fourth support plate - cold leg C03 Third support plate - cold leg
[
CO2 Second support plate - cold leg i
C01 First support plate - cold leg
{
CTS Top of tubesheet - cold leg CTE Tube end - cold leg 2
Indication locations are designated by an above listed major location and numeric values in inches above or below a major location. Positive inches indicate positive elevation (example - HTS + 1.0 is one' inch above the hot leg top of tubesheet).
AVE Anti-vibration Bar COI Circumferentially Oriented Indication MAI Multiple Axial Indications l
MFG Manufacturing ODI Outside Diameter Indication ODSCC/ IGA Outside Diameter Stress Corrosion Cracking /Intergranular Attack PWSCC Primary Water Stress Corrosion Cracking j
SAI Single Axial Indication-i
- 3239g q
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