ML20199B105
| ML20199B105 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/05/1986 |
| From: | Morgan H SOUTHERN CALIFORNIA EDISON CO. |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| NUDOCS 8606170022 | |
| Download: ML20199B105 (13) | |
Text
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K.C9WD f"'cGE CM Southem Califomia Edison Comyyg g
- 9 SAN ONOFRE NUCLEAR GENERATING SY ON P. O. BOX 128 SAN CLEMENTE. CALIFORNIA 92672 qpff.Q / I' ~
H E. MORGAN TELEPHONE June 5, 1986 O. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Attention:
Mr. J. B. Martin, Regional Administrator
Dear Sir:
Subject:
Docket No. 50-362 Special Report - Inservice Inspection of Steam Generator Tubes San Onofre Nuclear Generating Station, Unit 3
Reference:
Letter from M. O. Medford (Southern California Edison) to G. W. Knighton (Branch Chief, Licensing Branch No. 3, U.S. Nuclear Regulatory Commission) dated April 5, 1985 with the following enclosures:
(1) Metallurgical Defects in Steam Generator Tubes, San Onofre Unit 2, April 3,1985 (2) Steam Generator Tubing Vear, San Onofre Unit 2, April 3, 1985 s
Pursuant to Section 6.9.2 of Appendix A, Technical Specifications to Facility Operating License NPF-15, this report is being submitted as required by Surveillance Requirement 4.4.4.5(b) associated with Limiting Condition for Operation (LCO) 3.4.4.
This Surveillance Requirement requires that a Special Report be prepared end submitted to the Cor, mission within 12 months following the completion of each inservice inspection of steam generator tubes.
During the Cycle 2 refueling outage, an inservice inspection of 100% of the full length of unplugged tubes in both steam generators was conducted and completed on October 27, 1985. A total of 6 tubes in Steam Generator E-088 and 20 tubes in Steam Generator E-089 were plugged.
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8606170022 860605 PDR ADOCK 05000362 G
PDR g_g
Mr. J. B. Martin As required by Surveillance Requirement 4.4.4.5(b), complete results of the recently completed inservice inspection for Steam Generators E-088 and E-089 tubes are provided in the enclosures. provides the steam generator internal location reference guide. The eddy current defect / indication locations listed in the remaining enclosures are based upon this guide.
Enclosures 2 and 4 provide a list of eddy current testing indications including tube identification, indication depth, and the axial location of the indication in the tube. Enclosures 3 and 5 provide a list of tubes plugged after the completion of the inservice inspection. Tubes plugged as a result of wall loss have the depth and axial location of the eddy current indication provided. Preventive tube plugging for Unit 3 was done in a manner similar to Unit 2 as described in the reference. The reason for preventive plugging is appropriately annotated in enclosures 3 and 5.
If you require any additional information, please so advise.
Sincerely, h
~
Enclosures:
1 Combustion Engineering Model 3410 Steam Generator E-088 and E-089 Support Designation Guide and Illustrative Diagram 2
List of Eddy Current Indications, Steam Generator E-088 3
List of Tubes Plugged, Steam Generator E-088 4
List of Eddy Current Indications, Steam Generator E-089 5
List of Tubes Plugged, Steam Generator E-089 cc:
F. R. Huey (USNRC Senior Resident Inspector, Units 1, 2 and 3)
H. Rood (Project Manager, SONGS 2/3, USNRC, NRR)
U. S. Nuclear Regulatory Con.ission Document Control Desk Institute of Nuclear Power Operations (INPO)
Page 1 of 2
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ENCLOSURE 1 CONBUSTION ENGINEERING MODEL 3410 STEAM GENERATOR ILLUSTRATIVE DIAGRAM VERTICAL HOT / COLD LEG i
i SUPPORTS VM OUTERMOST VC2 TUBE (
V,H,2 VH1 VH3 VC3 VC1 I
.I DC OH i
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C10 H10 i
't H9 9
g C9
~
f H8
-k C8 I s*y INNERMOST ll y
C7 i
I e
I H6 C6 HOT LEG COLD LEC l
SUPPORTS SUPPORTS H5 C5 l
l H4 C4 H3 C3 m
e i
H2 C2 SHROUD H1 C1
[k f
TUBESHEET
\\
HTS CTS 4
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_N y N i
O O
3 I
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Page 2 of 2 ENCLOSURE 1 (Continued)
CLARIFICATION OF TUBING / SUPPORT INTERFACES AB0VE THE 7TH FULL EGGCRATE SUPPORT R0WS TUBING / SUPPORT INTERFACES 120-147 H8, H9, H10 DH, VH1, VH2, VH3, VM, VC3, VC2, VC1, DC, C10, C9, C8 115-119 H8, H9 DH, VH1, VH2, VH3, VM, VC3, VC2, VCI, DC C9, C8 84-114 H8, H9 DH VH2, VH3, VM, VC3, VC2 DC C9, C8 83 H8 DH VH2, VH3, VM, VC3, VC2 DC C8 51-82 H8 DH VH3, VM, VC3 DC C8 49-50 H8 DH-VM DC C8 25-48 DH VM DC 1-24 DH DC' 8388u
Page 1 of 3 LIST OF EDDY CURRENT INDICATIONS San Onofre Unit 3 Steam Generator E-088 Row Column Indication (% through-wall)
Location 69 43 44 VM + 7.6
=94 54 38 VH2 + 5.6 123 69 38 H2 + 12.0 85 145 38 C5 + 6.5 104 80 34 H7 + 30.0 138 90 28 C1 + 12.8 125 91 28 H3 + 3.30-98 152 27 C2 + 22.9 27 45 26 H2 + 24.5 48 90 22 DH 147 81 21 DC 5
13
<20 C4 + 8.2 14 16
<20 C2 + 10.3 83 17
<20 C7 + 40.8 55 37
<20 H2 + 23.7 2
38
<20 C3 + 3.4 38 40
<20 H1 + 34.8 4
27 41-
<20 H1 + 2.4 56 42
<20 CTS + 16.G 88 42
<20 H2 + 3.1 86 46
<20 H7 + 3.0 2
48
<20 H3 + 15.7 46 52
<20 H7 + 3.0 88 52
<20 H6 + 30.7
Page 2 of 3
. (Continued)
LIST OF EDDY CURRENT INDICATIONS San Onofre Unit 3 Steam Generator E-088 Row Column Indication (% through-wall)
Location 4
54
<20 C3 + 13.7 116 56
<20 H5 + 30.5 76 62.
<20 H5 + 31.4 36 70
<20 L1 + 4.2 102 70
<20 H2 + 11.'/
70 72
<20 C3 + 15.0 63 75
<20 HI + 7.5 107 89
<20 H2 + 5.2' 125 91
<20 H3 + 2.5 140 92
<20 C2 + 12.5 79 93
<20 VM + 1.6 108 96
<20 H4 + 15.0 128 96
<20 H1 + 31.1 81 97
<20 H2 + 23.7 55 99
<20 C5 + 2.4 38 102
<20 VM 59 103
<20 VM + 4.4 75 122
<20 DH + 19.8 3
129
<20 C3 + 21.9 127 129
<20 CTS + 7.5 100 134
<20 H1 + 16.7 110 134
<20 H3 + 13.1 66 138
<20 C7 + 8.2
Page 3 of 3
. (Continued)
LIST OF EDDY CURRENT INDICATIONS San Onofre Unit 3 Steam Generator E-088 4
Row Column Indication (% through-wall) location 100 142
<20 C6 + 20 100 142
<20 H1 + 17.6 29 155
<20 C4 + 5.4 5
157
<20 HTS + 8.5 5
159
<20 H3 + 10.3 l
21 159
<20 C4 + 3.5 i-i l
l l
i i
l
^
P t
i 8388u
LIST OF TUBES PLUGGED San Onofre Unit 3 Steam Generator E-088 Row Column Reason 69 43 44% at VM + 7.6 26 152 Potential Metallurgical Defect (Preventive Maintenance) 66 136 Potential Metallurgical Defect (Preventive Maintenance) 96 40 Potential Metallurgical Defect (Preventive Maintenance) 109 67 Potential Metallurgical Defect (Preventive Maintenance) 111 103 Potential Metallurgical Defect (Preventive Maintenance) 4 4
I i
l l
l-8388u
Page 1 of 4 4
i.
LIST OF EDDY CURRENT INDICATIONS San Onofre Unit 3 Steam Generator E-089 Row Column Indication (% through-wall) location 129 59 78 DH + 13.3 111 81 43 H7 + 25.9 123 77 39 C3 + 24.3
.50 82 39 DH +. 4 140 96 39 C2 + 34 133 97 39 C6 + 14.2 123 111 38 H9 + 26.4 46 138 38 C5 + 12.3 3
19 139 38 H1 + 15.3 30 4
37 C3 + 34.4 118 38 37 H8 + 9.9 129 59-37 C8 + 22.3 111 81 37 VH3 +.4 120 54 35 H9 + 8.5 115 103 35 H9 + 18.0 101 35 33 H3 + 12.0 l
135 57 33 H9 + 11.7 129 59 33 C8 + 9.2 122 132 33 C4 + 25.4 l
129 105 31 H2 + 13.3 136 120 31 C1 + 29.4 113 83 29 C4 + 4.7 47 95 29 DC 104 36 28 C4 + 15.2 f
- -......,., -... - -., ~ -
= -.
Page 2 of 4
, (Continued) t LIST OF EDDY CURRENT INDICATIONS San Onofre Unit 3 Steam Generator E-089
^
Row Column Indication (% through-wall) location 125 107 28 VH3 + 7.4 118 38 27 CTS + 20.2 103 65 27 H5 + 9.8 41 79 27 VM 117 131 27 H6 + 31.7 39 155 27 C6 + 36.2
-139 85 26 H9 + 18.3 138' 94-25 HTS + 18.5 l
104 28 23 DH + 29.0 129 59 23 DH + 3.9 108 80 23 H7 + 23.1 4
64 108 23 H3 + 12.4 120 110 23 H6 + 10.9 119 133 23 VC3 + 7.7 42 164 23 C2 + 26.1 103 65 23 HS + 2.8 i
125 99 22 H4 + 26.5 131 101 22 H6 + 9.4 i
108 128 22 HS + 20.2 135 101 21 C5 + 24.3 1
113 53
<20 C6 + 25.5 130 54
<20 C2 + 33.3 129 57
<20 HI + 22.6
Page 3 of 4
. (Continued) j LIST OF EDDY CURRENT INDICATIONS San Onofre Unit 3 Steam Generator E-089 Row
' Column-Indication (% through-wall) location 129 59
<20 C9 + 13.2 129 59
<20 H8 + 24.9 129 59
<20 VC2+ 5.4 106 60
<20 H9 + 5.7 4
108 62
<20 H7 + 11.8 129 65
<20 VC3 + 8.6 138 72
<20 C5 + 3.6 137 73
<20 C9 + 14.7 62 74
<20 H1 + 27.7 t
113 75
<20 H3 + 16.9 74 86
<20
}{4 + 22.7 135 87
<20 VH2 + 2.7 119 89
<20 H8 + 24.9 106 94
<20 H8 + 12.2 138 96
<20 C5 + 9.9 133 97'
<20 C8 + 9.9 9
i 133 97
<20 C7 + 7.0 40 98
<20 DH + 0.5 41 101
<20 VM + 1.9 127 101
<20 C7 + 1.6 129 103
<20 VC2 + 5.8 138 108
<20 C10 + 5.8 118 112
<20 C8 + 21.5 4
y
_ + _
m
=
Page 4 of 4 a
- s. (Continued)
LIST OF EDDY CURRENT INDICATIONS San Onofre Unit 3 Steam Generator-E-089 Row Column Indication (% through-wall) location 136 114
<20 VC1 + 1.8 118 122
<20 HTS + 11.0 113 123
<20 HTS + 13.6 20 124
<20 C2 + 26.7 117 127
<20 C4 + 9.4 124 128
<20 H4 + 10.9 97 131
<20 C6 + 3.3 46 138
<20 C4 21 147
<20 C6 + 20.8 53 147
<20 C4 +-19.6 61 151
<20 HTS 4
20 156
<20 C6 + 1.3 20 156
<20 C4 + 3.9 20 156
<20 C4 + 2.8 l
4 158
<20 C6 + 3.0 i
69 159
<20 VH3 + 11.0 l'
61 161
<20 H6 + 22.2 l
i
(
8388u i
s LIST OF TUBES PLUGGED San Onofre Unit 3 Steam Generator E-089 Row Column Reason 129 59 78% at DH + 13.3 50 82 39% at DH + 0.4 (Preventive Maintenance)
-40 98
<20% at DH + 0.5 (Preventive Maintenance) 61 151 Potential Metallurgical Defect (Preventive Maintenance) 18 132 Potential Metallurgical Defect (Preventive Maintenance) 42 72 Potential Metallurgical Defect (Preventive Maintenance) 47 95 29% at DC (Preventive Maintenance) 59 109 Potential Metallurgical Defect (Preventive Maintenance) 66 12 Potential Metallurgical Defect (Preventive Maintenance) 77 21 Potential Metallurgical Defect (Preventive Maintenance) 82
'32 Potential Metallurgical Defect (Preventive Maintenance) 94 150 Potential Metallurgical Defect (Preventive Maintenance) 107 65 Potential Metallurgical Defect (Preventive Maintenance) 109 87 Potential Metallurgical Defect (Preventive Maintenance) 117 93 Potential Metallurgical Defect (Preventive Maintenance) l 119 133 Potential Metallurgical Defect (Preventive Maintenance) 120 40 Potential Metallurgical Defect (Preventive Maintenance) t 120 136 Potential Metallurgical Defect (Proventive Maintenance) 131 95 Potential Metallurgical Defect (Preventive Maintenance) 140 104 Potential Metallurgical Defect (Preventive Maintenance) 8388u