View source for DCL-02-065, Special Report 02-01: Results of Steam Generator Tube Eddy Current Inspections During Tenth Refueling Outage

{{Adams
| number = ML021640337
| issue date = 05/28/2002
| title = Special Report 02-01: Results of Steam Generator Tube Eddy Current Inspections During Tenth Refueling Outage
| author name = Oatley D
| author affiliation = Pacific Gas &amp; Electric Co
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000323
| license number = DPR-082
| contact person = 
| case reference number = DCL-02-065
| document type = Letter type:DCL, Report, Miscellaneous
| page count = 19
}}

=Text=
{{#Wiki_filter:Pacific Gas and Electric Company David H. Oatley          Diablo Canyon Power Plant Vice President           PO.Box 56 Diablo Canyon Operations Avila Beach. CA 93424 805.545.4350 May 28, 2002                                                                            Fax: 805.545.4234 PG&E Letter DCL-02-065 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Docket No. 50-323, OL-DPR-82 Diablo Canyon Unit 2 Special Reort 02-01: Results of Steam Generator Tube Eddy Current Inspections During Unit 2 Tenth Refueling Outage

==Dear Commissioners and Staff:==

In accordance with Diablo Canyon Power Plant Technical Specification 5.6.10.b, this special report provides the results of steam generator (SG) tube eddy current inspections performed during the Unit 2 tenth refueling outage, completed in May 2001.
The enclosed tables provide the number and extent of tubes inspected in each SG, the location and percent through-wall of each indication identified, and identification of tubes plugged.
Sincerely, David H. Oatley ddm/469 Enclosure cclenc: Ellis W. Merschoff David L. Proulx Girija S. Shukla State of California Diablo Distribution A member of the   STARS (Strategic Teaming and Resource Sharing) Attiance                     'A   C)CA Caltaway
* Comanche Peak
* Diablo Canyon
* Pato Verde
* South Texas Project a Wotf Creek

Enclosure PG&E Letter DCL-02-065 SPECIAL REPORT 02-01 RESULTS OF STEAM GENERATOR TUBE EDDY CURRENT INSPECTIONS DURING UNIT 2 TENTH REFUELING OUTAGE Enclosure PG&E Letter DCL-02-065 Introduction TS 5.6.10.b requires that the results of steam generator tube inspections be submitted to the NRC within 12 months following completion of the inspection. The report shall include:
: 1. Number and extent of tubes inspected,
: 2. Location and percent of wall thickness penetration for each indication of an imperfection, and
: 3. Identification of tubes plugged.
Table 1 provides the number and extent of tubes inspected in each SG.
Table 2 provides the location and percent through-wall of each indication identified, and identifies the tubes that were plugged in 2R1 0. One tube was preventively plugged due to data quality concerns, where no indication was detected by eddy current.
Notes:
: 1. Free span indications (e.g., manufacturing burnish mark) that had eddy current signals traceable to preservice inspection data are not considered as reportable indications and are not included in this report.
: 2. Table 2 provides axial outside diameter stress corrosion cracking (ODSCC) indications at TSPs that were confirmed by Plus Point. For simplicity, one indication per TSP is reported, even if multiple indications were reported by Plus Point. Bobbin distorted OD support signals (DOS) that were not confirmed by Plus Point are not reportable indications and are not included in this report. A discussion of DOS attributed to axial ODSCC are included in the 90 day report for voltage-based alternate repair criteria (ARC), submitted to the NRC in DCL-01 -086 dated August 21, 2001.
Abbreviations and Terms The following provides a definition of abbreviations and terms used in Tables 1 and 2.
SG                  Steam Generator Row                 Row Col                 Column Location            SG location codes Inch               Distance above or below the center line of the TSP or the top of TS, inches Bobbin             Differential inside diameter coil probe
+Point              Plus Point rotating probe TSP                 Tube support plate TS                  Tubesheet Indication         Type of indication: Indication Code, anti-vibration bar (AVB) wear, or cold leg thinning (CLT)
ID/OD              Location of crack-like indications on tube surface, either ID or OD
 %TW                Depth of indication as percent through-wall. 0% indicates a signal with shallow OD phase angle.
INDICATION CODES SAI                Single axial indication (from +Point exam)
Note: SAI may be left in service for the following reasons:
                    "* Voltage-based ARC for axial ODSCC at TSP intersections
                    "* W* ARC for axial PWSCC in WEXTEX tubesheet
                    "* Less than 40% through-wall axial PWSCC at dented TSP intersections SCI                Single circumferential indication (from +Point exam)
Enclosure PG&E Letter DCL-02-065 Table 1 Number and Extent of Tube Inspections During 2R10 SCOPE         PROBE         SG 21              SG 22              SG 23             SG 24 Full length (except  Bobbin        100%                100%               100%              100%
Rows 1 and 2 U-bends)
Rows 1 and 2 U-bends   + Point       100%                100%               100%              100%
Hot Leg top-of     + Point       100%                100%               100%              100%
tubesheet
 > 5 volt dented TSP   + Point       100%                100%               100%              100%
intersections
>2 and < 5 volt dented + Point    20% at 1H       100% from 1H to     100% from 1H to  100% from 1H to TSP intersections                                5H, 20% at 6H       3H, 20% at 4H     3H, 20% at 4H Hot leg roll plugs  + Point        NA            100% of plugs            NA          100% of plugs installed in 2R7                     installed in 2R7 Distorted OD bobbin   + Point    Per voltage-       Per voltage-       Per voltage-      Per voltage signals at TSP               based repair        based repair       based repair      based repair intersections                  criteria            criteria           criteria          criteria Distorted ID bobbin   + Point       100%                100%               100%              100%
signals at TSP intersections Free span dings     + Point 20% TSH to 1H       20% TSH to 5H      20% TSH to 3H    20% TSH to 3H Baseline TSP ligament  + Point        NA                  NA                100%              100%
indications Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R10 SG Row Col  Elev   Inch      Ind    %TW ID/OD       Reason for 2R10 Tube Plugging 21  2   2   2C    -0.10     CLT      31 21  2   4   3C     0.13     CLT       3 21  2  47   2H    -0.07     SAI             OD 21  3   1   2C     0.00     CLT      31 21  3   4   2C    -0.13     CLT       0 21  3  46   2H     0.05     SAI             OD 21  3  59  TSH    -1.10     SAI              ID 21  4   1   2C    -0.07     CLT       8 21  4   2   2C    -0.08     CLT      32 21  4   3   2C    -0.09     CLT      19 21  4   3   3C    -0.07     CLT       5 21  4  94    1C   -0.15     CLT      32 21  5   2   2C     0.02     CLT       3 21  5  17   2H    -0.05     SAI             OD        >2VDOSandSAI-OD@2H 21  6   1   2C    -0.06     CLT       6 21  6  77  TSH    -1.27     SAI              ID 21  7   1   2C     0.00     CLT      35 21  7  24  TSH    -1.78     SAI              ID 21  7  62  TSH    -1.78     SAI              ID 21  8   2   2C    -0.04     CLT       0 21  8   3   2C    -0.04     CLT      49                   >40%TWCLT@2C 21  8  22   1H     0.04     SAI             OD 21  8  32  TSH    -1.73     SAI              ID 21  9  49  TSH    -2.00     SAI              ID 21 10   2   2C    -0.08     CLT      17 21 10   3   2C    -0.10     CLT       0 21 11  27   1H     0.04     SAI             OD        >2VDOSandSAI-OD@IH 21 11  37  TSH    -1.81     SAI              ID 21 11  37  TSH    -7.22     SAI              ID 21 11  37  TSH    -6.32     SAI              ID 21 11  39  TSH    -1.37     SAI              ID 21 11  40  TSH    -0.88     SAI              ID 21 11  48  TSH    -4.88     SAI              ID 21 12   3   2C     0.02     CLT       8 21 12  30   1H    -0.05     SAI             OD 21 12  68   2H    -0.02     SAI             OD 21 12  68   2H     0.17     SAI             OD 21 12  92   2C     0.02     CLT       9 21 13   3   2C    -0.04     CLT       0 21 13  39   1H     0.06     SAI             OD 21 13  39   1H    -0.19     SAI             OD 21 13  92   2C     0.04     CLT       0 21 15  32  TSH    -0.42     SAI              ID      TSH Axial PWSCC Failed W*
21 18  43   1H    0.03      SAI             OD Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R1 0 SG Row Col Elev Inch                          Ind      %TW ID/OD Reason for 2R10 Tube Plugging 29 21 19 48 7H 36.49 AVB wear "13,, -in  R7      7W      AQlRA       AVRw.A~r        I139 21    19   70      7H      50.12       AVBwear           16 21    20   48      7H      37.95       AVB wear          20 21    20   61      7H      37.81       AVB wear          15 21    21   70      7H      40.27       AVB wear          20 21    21   70      7H      69.47       AVB wear           9 21   22    8      1C       0.00             CLT         23 21   22   37      7H      25.51       AVB wear          22 21   22   63      7H      25.59       AVB wear          20 21   22   63      7H      40.98       AVB wear          23 21   22   63      7H      57.83       AVB wear           17 21   22   63      7H      73.26        AVB wear         25 21   23   53      7H      26.82        AVB wear         25 21   23   53      7H      42.78        AVB wear         27 21   23   53      7H      60.55        AVB wear          18 21   23   63      7H       27.38       AVB wear          12 21   23   63      7H       42.58       AVB wear          22 21   23   63      7H       60.61       AVB wear          37 21   23   64      7H       42.71       AVB wear          16 21   23   64      7H       60.57       AVB wear          28 21   23    65     7H       42.69       AVB wear          24 21    23   65      7H      60.63       AVB wear          36 21    23   65      7H      77.02       AVB wear          14 21    23   67      7H      28.06       AVB wear          17 21    23   70     TSH       -1.36             SAI                 ID 21    23   71      7H      43.31       AVB wear           9 21    23   71      7H      60.60       AVB wear          25 21   23   72      7H      43.33       AVB wear          17 21   23   72      7H      60.93       AVB wear          19 21   23   72      7H       76.99      AVB wear          12 21   23   74      7H       26.90      AVBwear           24 21   24   39      7H       27.98       AVB wear          18 21   24   61 7H            44.33       AVB wear          17 21   24   61 7H            63.04       AVB wear          18 21   24   62 7H            27.26       AVB wear          16 21   24      63 7H         44.15       AVB wear          14 21    24  62 7H            62.84       AVB wear          15 21    24 63       7H 27.07 AVB wear                      23 21    24 63       7H 44.43 AVB wear                      26 21    2463        7,H 63.14 ,AVB wear                    1 21    24 68       7H27.38                 ,VB wear       25 21    25     9     3C       -0.02            CLT         37 21    25   ,I ,1   )          n "1*          *IT          4 I I   ~'.
L.''       i'' I      'l* T 1      1 _____ _________ _________________
Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R1 0 SG Row Col  Elev    Inch     Ind    %TW   ID/OD     Reason for 2R10 Tube Plugging 21  25 32   7H     46.43 AVB wear 22 21  25 32   7H     66.51 AVB wear 28 21  26 10   2C     -0.15    CLT      39 21  26 29   7H     87.06 AVB wear 18 21  26 67   7H     28.63 AVB wear 28 21  26 67   7H     47.60 AVB wear 18 21  26 67   7H     68.13 AVBwear 26 21  26 67   7H     87.41 AVB wear 24 21  27 10   2C     -0.15    CLT      31 21  27 11   2C     -0.17    CLT       0 21  27 38    1H     0.04    SAI             OD 21  27 42   7H     29.89 AVB wear 12 21  27 42   7H     49.67 AVB wear 36 21  27 42   7H     71.55 AVBwear 18 21  27 42   7H     91.73 AVB wear 20 21  27 48    1H     0.00    SAI             OD 21  27 48   1H      0.03    SAI             OD 21  27 64   7H    48.65  AVB wear 21 21  27 64   7H     70.91 AVB wear 31 21  27 64   7H     91.21 AVBwear 30 21  27 65   7H     29.08 AVB wear 11 21  27 65   7H     70.49 AVB wear 24 21  27 65   7H     90.47 AVB wear 18 21  27 66   7H    29.24  AVB wear 35 21 27  66   7H    49.13  AVBwear 34 21 27  66   7H     70.49 AVB wear 23 21 28  11    10     0.15    CLT      31 21 28  14   2C     -0.15    CLT      35 21 29  11   2C     -0.16    CLT       0 21 29  31   7H     75.84 AVB   wear  13 21 29  36   7H     75.98 AVB wear 30 21  30 52   2H     -0.02    SAI             OD 21  32 79   4C     -0.09    CLT       I 21  33 59   7H     58.38 AVB wear 27 21 34  47   7H     33.64 AVB wear 22                      >40%TWAVB Wear 21  34 47   7H     59.13 AVB wear 40                      >40%TWAVB Wear 21 34  47   7H    88.46  AVB wear 23                      >40%TW AVB Wear 21 34  47   7H    115.63 AVB wear 29                      >40%TWAVB Wear 21 34  48   7H     88.22 AVB wear 20 21 34  48   7H    114.99 AVBwear 36 21 34  53   7H    115.08 AVBwear 15 21 35  38   7H    59.35  AVB wear 30 21 35  77   4C     0.09     CLT      39 21 36  19   1C     0.44     CLT      20 Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R10 SG Row Col Elev       Inch      Ind     %TW     ID/OD I Reason for 2R10 Tube Plugging n* n37   1-1IT      r) 21   36   35   7H    62.61     CVBwear   36 21   36   53   7H    34.34 ,AVB wear     22 21   36   53   7H    62.40 AVBwear       25 21   36   54   7H    34.39 AVBlwear      18 21   36   54   7H    62.60 AVBwear       34 21   37   19   2C     -0.06    CLT       34 21   37   21    1C     0.18    CLT       35 21   38   46   2H      0.00     SAI               OD 21   39   58   3H      0.07     SAI               OD         SAI-OD @ 3H Wedge 21   40   37   2H      0.02     SAI                OD 21  42   32    1C     0.00    CLT        0 21  44   36    3C    -0.30    CLT         3 22   1   51    7H     3.83     SAI                             SAI-IDin U-bend 22   2   23    1H     0.02     SAI      27        ID 22   2   26    1H    -0.62     SAI      61        ID        SAI-ID>40%TW@        1H 22   2   36    1H    -0.11     SCl                OD            SCI-OD @ IH 22   2   93    2C     -0.08         SL   20     I 22   2   94 2C        -0.04    CLT      25                  SAI-ID >40%TW@ 1H 22   3    34 1H       -0.49     SAI     44         ID 22   4    2      2C -0.09      CLT       29 22   4    2 2C         0.02    CLT        6 22   4    28 1H        0.22     SAI      32        ID 22   4    34 4H        0.17     SAI      20        ID, 22   4    83   2C     -0.15    CLT        6 22   4    93 2C -0.15          CLT        6 22   5     1 IC -0.13]         CLT       24 22   5     3 1H       -0.04     SAI      32         ID 22   5    18  TSH     -0.93     SAI                 ID, 22   5    26 1H -0.20           SAI      39         ID 22   5    33 1H -0.-30          SAI      37         ID 22  5    41 2H        -0.04     SAI              OD 22  6    24 1H        -0.37     SAI     20         ID 22  6    29 1H        -0.16     SCI              OD            -SCI-OD @ 1H 22  6    30 1H         0.17     SCI                ID            SCI-ID@ 1H 22   6   31 1H -0.08            SAI      20        ID 22   6   361 1H 1-0.15          SAI      39        ID 22   6   93 1C 10.04           CLT       47                 >40%TW CLT @lIC 22   61  93 2C -0.08           CLT       35                  >40%TW CLT @ 1lC 22   6   93 4C         0.06    CLT         6                 >40%TW CLT @ 1lC SAI      26         ID r22   7   27    1H      0.21 22   7    32   1H     -0.29     SAI      29_I 22   7    73   2H      0.00     SAI               OD 22   7    821 1H      -0.07     SAI               OD                                    I Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R10 SG Row Col     Elev    Inch     Ind    %TW ID/OD       Reason for 2R10 Tube Plugging 22 7 93        2C    -0.09     CLT      36 22 8      3    2C     -0.15    CLT       0 22 8 26         1H     0.07    SAI      62      ID          SAI-ID >40%TW         1H 22 8 36         1H    -0.21    SAI      37      ID 22 8 43        4H     -0.02    SAI      37      ID 22 8 93         2C    -0.06    CLT        1 22 9       9    1H     0.02     SAI             OD 22 9 32         1H    -0.12     SAI      29      ID 22 10 2         3C     0.00    CLT       18 22   10   48 TSH      -2.90     SAI              ID_      _
22  10   56   TSH    -1.05     SAI              ID 22  10   93    2C    -0.04    CLT       37 22  11   19    1H     -0.52    SAI      42      ID         SCl-IDand SAI-ID a 1H 22  11   19    1H      0.26    SCI              ID         SCI-ID and SAI-ID a 1H 22  11   70    1H      0.03    SAI             OD 22  11   92    2C     -0.08    CLT      41                   >40%TWCLT @2C 22  12   39    1H     -0.12    SAI      29      ID 22  12   71    1H     -0.20     SAI            OD 22  13    3   TSC     -0.06    CLT      21 22  13    3    2C     -0.06    CLT      24 22  13   23     1H     0.27     SCl              ID               SCID @.1H 22  13   25    3H     -0.07     SAI      34      ID 22  13   41     1H    -0.07     SAI      32      ID 22  13    43  TSH      -1.34    SAI              ID 22   14   15    2H     -0.27    SAI      43      ID         SAI-0D>40%TW@2H 22   14   45    1H      0.01    SAI      20      ID 22   15   22    1H      0.03    SAI      31      ID 22  15   42    1H      0.07    SAI      23      ID 22  15   51    1H     -0.12    SAI      20      ID 22  15   73    1H      0.12    SAI             OD 22  16   30    2H     -0.18    SAI             OD 22  16   39 4H        -0.09    SAI      40       ID        SAI-ID >40%TW @       4H 22  16   39    4H     -0.01    SAI      37       ID        SAI-ID >40%TW @4H 22  16   49    1H     -0.17    SAI      34       ID 22  16   50    1H     -0.04     SAI             OD 22  17   12    1H      0.27     SAI     30       ID 22  17   88 1H          0.15    SAI             OD 22  18   21     1H     -0.12    SAI             OD 22  18   51     1H     -0.11    SAI     29       ID         SAI-I D >40%TW@a 1H 22  18   51     1H     -0.22    SAI     55       ID         SAI-ID_>40%TW @ 1H 22  18    82    1H      0.00    SAI             OD 22   19    7 1H        -0.13    SCI               ID              SCI-ID    IH 22   19    9 1H         0.28    SCI               ID              SCI-ID@ 1H Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R1 0 SG Row Col  Elev    Inch    Ind     %TW ID/OD       Reason for 2R10 Tube Plugging 22  19 15    1H    0.10     SAI      20      ID 22  19 17    1H   -0.46     SAI      25      ID 22  19 52   7H    37.16  AVB wear 15 22  19 61   1H    -0.02     SAI             OD 22  19 63    7H   36.09  AVB wear 23 22  19 63    7H   50.20  AVB wear 30 22  19 65    7H   37.52  AVB wear 33 22  19 65    7H   50.13  AVBwear 21 22  19 65    7H   50.86  AVBwear 18 22  19 65    7H   63.95  AVB wear 28 22  19 65    7H   64.12  AVBwear     22 22  19 75    1H    0.09     SAI             OD 22  19 78    2H    0.01     SAI             OD 22  19 81    2H    -0.04    SAI             OD 22  20 55    7H   38.36  AVB wear    18 22  20 55    7H   66.66  AVB wear    19 22  20 58    7H   52.74  AVB wear    17 22  20 65    7H   37.49  AVB wear    27 22  20 65    7H   38.04 AVB wear     36 22  20 65    7H   52.43 AVB wear     35 22  20 65    7H   67.69 AVB wear     28 22  21 23    2H     0.00    SAI      43      ID          SAI-ID >40%TW@ 2H 22  21 36    7H   40.30 AVB wear     14 22  21 40    1H    -0.19    SAI      26      ID 22  21 41    1H     0.34    SAI      29      ID 22  21 47    7H   40.02 AVB wear     25 22  21 85    2H     0.08    SAI             OD 22  22 31    7H   40.45  AVB  wear   31 22  22 44    4H    -0.34    SAI      36      ID 22  22 45 1H       -0.02    SAI      46      ID          SA-ID >40%TW@ IH 22  22 63 7H      25.40 AVB wear     25 22  22 63 7H      40.67 AVB wear     27 22  22 63    7H   57.27 AVB wear     33 22  22 63    7H   74.45  AVB wear     10 22  22 67    7H   41.24  AVB wear    23 22  22 67    7H   58.44  AVB wear    35 22  22 69    7H   24.38  AVB wear    21 22  22 69    7H   40.89 AVB wear      16 22  22 69    7H    57.80 AVB wear    22 22  22 87    1C    -0.21    CLT       4 22  23 31    7H   28.10  AVBwear     23 22  23 31    7H   42.37  AVB wear    24 22  23 31    7H   60.06  AVB wear    21 22  23 31    7H    79.97 AVB wear     19 Enclosure PG&E Letter DCL-02-065 Table 2 Location  and Percent  Through-Wall of Indications Identified During 2R1 0 SG Row Col Elev      Inch      Ind     %TW ID/OD        Reason for 2R10 Tube Plugging 22  23  32   7H    42.17   AVBwear      25 22  23  32   7H    78.13   AVBwear      13 22 23   38 7H      60.55 AVB wear       25 22 23   40 7H      42.92 AVB wear       14 22  23  40   7H    60.17 AVB wear       14 22 23   40   7H    78.14   AVBwear      18 22 23   41   7H    26.85   AVB wear     19 22 23   41   7H    42.94   AVB wear     25 22 23   41   7H    43.44   AVB wear     30 22 23   41   7H    60.63   AVB wear     32 22 23   44   7H    27.50   AVB wear     28 22  23  44   7H    60.67   AVB wear     35 22  23  49   7H    27.72   AVB wear     28 22 23  49   7H    43.87   AVB wear     36 22 23  49   7H    60.76   AVB wear     29 22 23  53   7H    27.05   AVB wear      19 22 23  53    7H   43.17   AVB wear      36 22 23  53    7H   60.48   AVB wear      39 22 23  77   2H      0.00     SAI               OD 22 24  39    1H     0.10      SAI      40       ID         SAI-ID >40%TW@ 1H 22 24  87    2C    -0.17     CLT        31 22 25  13    1H     0.04      SAI              OD 22 25  21    1H    -0.02      SAI              OD 22 25  44    1H     0.10      SAI              OD 22 25  44    1H     0.09      SAI              OD 22 25  44    5H     0.00      SAI       20      ID 22 25  70    7H    65.49  AVB wear      12 22 26  64    7H    46.82 AVB wear       33 22 26  64    7H    67.50 AVB wear       31 22 26  65    7H    26.79 AVB wear       17 22 26  65    7H    47.08  AVB wear      24 22 26  65    7H    67.63  AVB wear      33 22 26  65    7H    89.03  AVB wear      18 22 27  23    1H    -0.28      SAI       46      ID          SA-ID >40%TW@ 1H 22 27  32    7H    29.01  AVBwear       27                   >40%TWAVB Wear 22 27  32    7H    47.78  AVB wear      37                   >40% TW AVB Wear 22  27  32   7H    48.81   AVB wear     16                   >40% TWAVB Wear 22  27  32   7H    70.09   AVB wear     40                   >40% TWAVB Wear 22  27 44    7H    29.41  AVB wear      21 22  27 44    7H    48.82   AVB wear     16 22  27 44    7H    70.84   AVB wear     33 22  27 49    7H    49.11   AVBwear      15 22  27  49 7H      70.42 AVB wear       25 22  27  49 7H      91.95 AVBwear        12
                                             -  10-

Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R10 SG   Row  Col Elev Inch         Ind    %TW ID/OD Reason for 2R10 Tube Plugging 22   27   55 7H 48.93 AVB         wear  32 22   27   57 7H 27.91 AVB wear 14 22   27   58 7H 70.36 AVB wear 24 22   27   58 7H 92.91 AVB wear 10 22    27  59 1H -0.53          SAI      46      ID          SAI-ID>40%TW@IH 22    28  15 TSH -10.57        SAI              ID 22    28  15 TSH -19.34        SAI              ID 22    28  15 TSH -18.81        SAI              ID 22    28  15 TSH -2.39         SAI              ID 22   28  15 TSH -1.92         SAI              ID 22   28  32 7H 30.74 AVB wear 20 22   28  32 7H 49.69 AVB wear 31 22   28  32 7H 50.39 AVB wear 36 22   28  32    7H    72.95 AVB wear     37 22   28  38    1H     0.00     SAI      34     ID 22   28  40    7H    50.70 AVB wear     34 22   28  40    7H    72.79 AVB wear     21 22   28  40 7H       73.02 AVB wear     23 22   28   40   7H    95.35 AVBwear      18 22   28  40    7H    95.69  AVB wear    17 22   28  53    2H     0.02     SAI             OD 22   28  64    7H    50.27  AVB wear    11 22   28  64    7H    72.58  AVB wear    24 22   28  66     7H   72.63  AVB wear    18 22   28   72   7H    93.96  AVB wear    28 22   29   36   7H    75.40  AVB wear    16 22   29  41    7H    30.71  AVB wear    10 22   29   41   7H    52.02  AVB wear    21 22   29   41   7H    98.94  AVB wear    12 22   29   42   7H    30.64  AVB wear    14 22   29   42   7H    51.71  AVBwear     15 22   29   45   7H    30.88  AVB wear    17 22   29   45   7H    51.78  AVB wear    33 22   29   45   7H    75.84  AVB wear    30 22   29   45   7H    99.25  AVB wear    17 22    29  51   7H    29.61  AVBwear     11 22    29  51   7H    51.90  AVBwear     18 22    29  51   7H    75.77  AVB wear     15 22    29  54   7H    52.15  AVB wear    25 22    29  54   7H    75.94  AVB wear    26 22    29  83   2C     -0.04    CLT      23 22    30  14   2C     -0.13    CLT       14 22    30  82   2C     -0.15    CLT       6 22   31  14   2C     -0.19    CLT       16 Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R10 SG   Row  Col   Elev Inch         Ind     %TW ID/OD      Reason for2R10 Tube Plugging 22    31  25   TSH -2.16          SAI               ID 22    31  29     2H    0.03       SAI               OD 22    31  80     2C -0.09        CLT       35 22    31  80     3C -0.17        CLT        9 22    32  16     2C -0.21        CLT        1 22    32  56     7H 56.35      AVB  wear   20 22    32  56     7H 83.19 AVBwear 24 22    32  56     7H 109.97 AVB wear 'i3 22    32  79     3C -0.02         CLT      13 22    32  79     7H 107.19 AVB wear 16 22   33   17    2C -0.13         CLT      24 22   33  50     2H    -0.06      SAI               OD 22   33   52    7H 32.76 AVB wear 15 22   33   52    7H 33.03 AVB wear 16 22   33   52    7H 59.11 AVB wear 33 22   33   52    7H 86.08 AVB wear 29 22   33   52    7H 86.99 AVBwear 22 22   33   53    7H 58.09 AVB wear 14 22   33   53    7H 113.31 AVBwear 13 22   33   65    7H 57.95 AVBwear 18 22    34  66    7H 59.94 AVBwear 14 22    34  66     7H 116.03 AVB wear 11 22    34  71     7H 87.25 AVB wear 14 22    34  74     7H 60.16 AVB wear 12 22    34  77     2C -0.11        CLT       2 22    34  79     2C   -0.17      CLT       23 22    35  78     3C    0.07      CLT       36 22    36  40     7H   34.70 AVB wear       20 22    36  42     7H   33.77 AVB wear       29 22    36  42     7H   62.08 AVB wear       26 22    36  56     2H    -0.17      SAI               OD 22   37  49     7H   96.03    AVB  wear   22 22   37  50 7H       95.46 AVB wear       24 22   37  56 7H       64.16 AVB wear       31 22   39  23 2C        -0.21      CLT      20 22   39  27 7H       100.94    .VIBwear   24 22   39   35 2H        0.04      SAI               OD        SAI-OD @ 2H Wedge 22   39   69 2C        0.13      CLT      19 22   39   71 IC       -0.13      CLT        5 22   40   27 2C       -0.20      CLT      26 22   40   31    2C    -0.21      CLT       10 22   40   57    7H    35.25 AVBwear        15 22   40   57     7H   68.70 AVBwear        19 22   40   68     1C    -0.26     CLT       31
                                                  -  12-

Enclosure PG&E Letter DCL-02-065 Table 2 Location  and Percent  Through-Wall of Indications Identified During 2R10 SG Row Col Elev Inch           Ind     %TW ID/OD       Reason for 2R10 Tube Plugging 22 40 71 1C -0.24             CLT       35 22  41  26   2C    -0.13      CLT       11 22  41  39   7H    36.98 AVBwear        11 22 42   28 2C       -0.26     CLT       42                   >40%TW CLT @ 2C 22  42  31   2C     -0.24     CLT       12 22 42   33 2C       -0.17     CLT       33 22  42  35    2C    -0.15     CLT       27 22  42  60    2C    -0.11     CLT       26 22  42  63    3C    -0.09     CLT       62                   >40%TW CLT @ 3C 22  42  63    4C    -0.23     CLT       24                   >40%TW CLT @ 3C 22  43  31    2C    -0.26     CLT       27 22  43  32    2C    -0.24     CLT       27 22  43  33 2C       -0.24     CLT       33 22  44  44 1H       -0.01     SAI               OD 22  44  58 2C       -0.15     CLT       21 22  45  37 2C       -0.13     CLT        11 22  45  45    2C    -0.26     CLT        17 22 45   53    2C    -0.13     CLT       29 23 2     2    2C    -0.02     CLT        3 23 2    75                                              Preventive, U-bend data quality 23 2    91   TSH    -0.69     SAI               ID 23 3   55    1H     0.02     SAI               OD 23 3   69   TSH    -0.95     SAI                ID 23 3   94    2C     0.07     CLT        6 23 5    5    3H    -0.08     SAI               OD       >2V DOS and SAI-OD @ 3H 23 5   51   TSH    -2.00     SAI                ID 23 5   55   TSH    -2.00      SAI               ID 23 6   54    1H    -0.03      SAI              OD       >2V DOS and SAI-OD Q 1H 23  6  77 TSH      -1.68      SAI               ID 23  7   1 1C       -0.07     CLT        10 23  7  52 TSH      -1.22      SAI               ID 23  7  59 TSH      -1.35      SAI               ID 23  7  92 TSH      -0.76      SAI               ID 23  8   2    1C    -0.04     CLT        38 23  8  55    1H    -0.03      SAI              OD 23  8  93   TSH    -0.71      SAI               ID 23  9  63   TSH    -1.11      SAI               ID 23  9   93   2C    -0.11     CLT        24 23  10 92    2C    -0.13     CLT        30 23  10 93 3C        0.06     CLT        16 23  12  8 2H       -0.04      SAI              OD 23  12 48 TSH      -2.14      SAI               ID 23  12 92 2C       -0.04     CLT        26 23  12 93 2C        0.02     CLT        30
                                             -  13-

Enclosure PG&E Letter DCL-02-065 Table 2 Location and   Percent  Through-Wall   of Indications Identified During 2R1 0 SG Row Col Elev Inch             Ind     %TW ID/OD Reason for 2R10 Tube Plugging 23   14  24 TSH     -1.86       SAI                ID 23   14  91 IC       0.00       CLT        31 23   14  92 2C      -0.04       CLT        20 23   16  24 TSH     -1.34       SAI                ID 23   17  34 2H       0.01       SAI                OD 23   17  43   2H     0.04       SAl      I         OD 23   17  43   2H     0.01       SAI                OD 23   17 72    TSH -0.78         SAI                ID 23   18 48     1H -0.03          SAI               OD 23   18 50     1H -0.03          SAI               OD 23   18 50     1H -0.10          SAI               OD 23   18 50     1H -0.04          SAI               OD 23   19 41     7H 37.40 AVB wear           24 23   19  56    7H   50.75 AVBwear          19 23 19    71 TSH -1.94            SAI                ID 23 20   32 1H 0.02              SAI               OD 23 21    38 TSH -1.35           SAI                ID 23 21   78 3H -0.05             SAI       25       ID 23  21  83 TSH      -0.93       SAI                ID 23  22 30     7H   42.59    AVB wear      31 23  22 78     IH    -0.10       SAI       66       ID           SAI-ID >40%TW@ 1H 223   3   9   IC    -0.28      CLT         1 23  23 40     7H    27.15   AVB wear      25 23  23 40     7H    43.25   AVB wear       18 23  23 40     7H    60.59    AVB wear     22 23  23 40     7H    77.37    AVB wear      16 23  23  41    7H    44.08 AVB wear         17 23  23  41    7H    60.50    AVB wear      18 23  23  42    7H    31.40    AVBwear       19 23  23  42    7H    44.26    AVB wear      25 23  23  42    7H    60.52    AVB wear      32 23  23  43    7H    43.73    AVB wear      15 23  23   54   7H    44.37    AVB wear      20 23  23   54   7H    59.91    AVB wear      15 23  23   54   7H    76.03    AVB wear      12 23  23   64   7H    60.94 AVB wear         21 23  24    8     IC  -0.04       CLT        40                    CLT>40%TW@ 1C 23  24   16 1H       0.03        SAI               OD 23  24   26 2H       0.02        SAI               OD        >2V DOS and SAI-OD @ 2H 23  25   37 TSH     -1.43        SAI                ID 23  27   59 1H       0.02        SAI               OD        >2V DOS and SAI-OD @ 1 H 23   28  12 TSH      -2.02       SAI                ID 23   29  15 2C       -0.17      CLT         0 23   29  61 7H      51.53 AVB wear          20 Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R1 0 SG Row Col  Elev Inch        Ind    %TW ID/OD       Reason for 2R10 Tube Plugging 23  32 55  TSH -0.89        SAI              ID 23  33 16    3C -0.04       CLT      24 23  33 36    7H 59.36    AVB wear 35 23  33 36    7H 85.80    AVB wear 31 23  33 42    7H 85.80    AVB wear 19 23  33 67    7H 58.99    AVB wear 14 23  33 67    7H 86.10    AVB wear 21 23  34 51    7H 61.16    AVBwear 19 23  34 51    7H 89.50    AVB wear 28 23  34 54    7H 60.84    AVB wear 30 23  34 54    7H 88.48    AVB wear 38 23  34 58    7H 60.40    AVB wear 22 23  34 58    7H 88.43    AVB wear 16 23  36 19    IC -0.02       CLT      23 23  36 36    7H 63.94    AVB wear 24 23  36 36    7H 93.58    AVB wear 21 23  36 36    7H 123.12   AVB wear 22 23 36  38    7H 93.30    AVB wear 17 23 38  21   2C -0.17        CLT      40                   CLT>40%TW@2C 23 39  45    1H    0.12     SAI             OD 23 41  66   2C -0.04        CLT       4 23 42  31    IC -0.18       CLT      19 23 42  64   2C -0.10        CLT      11 23 42  65   2C -0.13        CLT       0 23 43  35    IC    0.13     CLT      38 23 43  65   2C -0.10        CLT      38 23 44  41   2C -0.17        CLT      28 23 44  42   3H -0.03        SAI             OD 23 45  37  TSH -1.66        SAI              ID 23 45  38  TSH -2.52        SCl              ID               SCI-ID    TSH 23 45  46   2C -0.27        CLT      28 23 45  56    1H    0.27     SAI      20      ID 23 45  56   2C -0.10        CLT       1 23 45  57   3C -0.11        CLT      30 23 45  59   3C -0.23        CLT      17 23 46  46   2C -0.22        CLT       0 23 46  48   2C -0.22        CLT      27 23 46  51   2C -0.21        CLT       8 24  2  10  TSH -1.34        SAI              ID 24  2  29  TSH -2.26        SAI              ID 24  2  29  TSH -4.37        SAI              ID 24  2  47   3H -0.02        SAI             0D 24  2  47   3H -0.01        SAI             OD 24  2  93   2C -0.16        CLT      4 Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R10 SG Row Col Elev Inch            Ind    %TW ID/OD Reason for 2R10 Tube Plugging 24 3       5 TSH -1.35          SAI               ID 24 3       12 TSH -2.21         SAI               ID 24    3    12 TSH     -2.58     SAl               ID 0.01     SAI              OD       >2V DOS and SAI-OD         IH 24    3    51 1H 24    3    93 2C      -0.09     CLT      36 24    4     2 1C       0.00     CLT      40                   >40%TWCLT @ 1C 24    4    35 TSH     -1.81     SAI               ID SAI              OD       >2VDOSandSAI-OD            IH 24    4    45 1H      -0.02 24    5    36 TSH     -1.91     SAI                ID 24    5    37 TSH     -3.78     SAI                ID 24    5    37 TSH     -4.13     SAI                ID
                      -0.12     SAI              OD       >2VDOSandSAI-OD             IH 24   5    48 1H 24   5    53 TSH      -1.79     SAI               ID 24   5    93 1C       -0.13    CLT      13
                       -0.14     SAI     51        ID        SAI-ID >40%TW        3H 24   6    27 3H 24    6   33 TSH      -2.58     SAI               ID 24    7    4 TSH      -1.18     SAI               ID 24    7    38 TSH     -4.27     SAI               ID 24    7    38 TSH     -6.89     SAI               ID 24    7    62 1H      -0.04     SAI              OD       >2VDOSandSAI-OD@H 24    8    22 2H      -0.08     SAI      41        ID       SAI-ID>40%TW @2H
                       -0.07     SAI              OD  D    >2VDOSand SAI-OD            1H 24    8    63 1H 24    8    69 1H       -0.04    SAI               OD 24   10    11 1H        0.00    SAI               OD 24   10    76 2H       -0.17    SAI               OD 24    10   92 2C        0.00    CLT       2 24   11   17 3H        0.00    SAI      42        ID        SAI-ID >40%TWQ 3H 24   12   17 3H        0.19    SAI      23        ID 24   13    4 TSH      -1.34     SAI               ID 24   13   40 TSH      -1.55     SAI                ID
                        -0.15     SAI              OD      >2V DOS and SAI-OD          1H 24   13   63 1H 24   13   66 2H       -0.01     SAI              OD 24   14    53 3H       0.05     SAI     22         ID 24   15    10 TSH      -0.86    SAI                ID 24   15    45 2H        0.01    SAI               OD 24   16    10 TSH      -2.00    SAI                ID 24   16    11 3H       -0.08    SAI      28        ID 24   16    42 1H       -0.09    SAI               OD 24   16    57 2H        0.04    SAI               OD     >2V DOS and SAI-OD a I1H 24    16   84  2H       0.07    SAI               OD 24   19 29    7H 26.04      AVBwear     15 24   19 29    7H 37.52      AVBwear     19 24   19 29    7H 62.28      AVB wear    11 419731   7H 1.61.36    AVB wear    23
                                                -   16  -

Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R1 0 SG  Row  Col  Elev Inch        Ind    %TW ID/OD       Reason for 2R10 Tube Plugging 24   19  84   1H     0.04     SAI             OD 24   19  84   2H -0.10        SAI             OD 24   19  84   2H -0.09        SAI             OD 24   19  84   2H     0.02     SAI             OD 24   19  88    1H   -0.01     SAI             OD 24   20 47   TSH -1.43        SAI              ID 24  20 83     1H 0.00        SAI             OD 24  21 45     1H 0.06        SAI             OD 24  22 7     2H -0.01        SAI             OD 24  22 30     7H 41.40 AVBwear        23 24  22 30     7H 42.06 AVB wear       23 24  22 30     7H 58.77 AVB wear        30 24  22 30     7H 73.93 AVB wear        16 24  22 47     2H 0.02         SAI            OD 24  22 47     2H    0.11      SAI            OD 24  23 52     7H 76.10 AVBwear         15 24  23 61     7H 43.17 AVBwear         21 24  23 61     7H 60.69 AVB wear        14 24  23  63    7H   61.01  AVBwear      29 24   23  70 7H     43.06 AVBwear       11 24   23 70 7H      75.13 AVB wear      14 24  24  26 TSH      -1.75     SAI             ID 24  24  29    7H   28.56  AVB wear     20 24  24  29    7H   63.49  AVB wear      8 24  24  29    7H    79.93 AVBwear      11 24  24  65    7H    25.92 AVB wear     22 24  24  65    7H   44.89  AVB wear     18 24  24   65   7H    62.50 AVB wear     22 24  24   73   2H     0.07     SAI             OD 24  24   73 2H       0.05     SAI             OD 24  24   84 1H      -0.09     SAI             OD        >2V DOS and SAI-OD @I H 24  24   87 1C      -0.15     CLT       2 24  25   64 TSH     -1.14     SAI              ID 24  25   67 7H      27.20  AVB  wear   21 24  25   67 7H      66.06 AVB wear     20 24  25   82 1H      -0.05     SAI             OD 24  26   45 TSH     -3.36     SAI              ID 24  27   69   2H     0.04     SAI             OD        >2V DOS and SAI-OD @ 2H 24  29   35   1H    -0.09      SAI            OD        >2VDOSandSAI-OD@IH 24 29 40      7H    30.12  AVB wear    22 24 29 40      7H    52.43  AVB wear    37 24 29 40      7H    75.30  AVB wear    26 24 29 40      7H    98.29  AVB wear    15 24 30 36      3H    -0.02      SAI            OD
                                            -  17-

Enclosure PG&E Letter DCL-02-065 Table 2 Location and Percent Through-Wall of Indications Identified During 2R10 SG Row Col  Elev Inch        Ind    %TW ID/OD       Reason for 2R10 Tube Plugging 24  30 81   2C 0.04         CLT       0 24  30 83   2C -0.02        CLT       0 24  31 31   1H -0.08        SAI             OD 24  31 31   2H -0.15        SAI             OD 24  31 45   1H     -0.08    SAI             OD        >2V DOS and SAI-OD @ IH 24  31 45  TSH     -1.78    SAI              ID       >2V DOS and SAI-OD @ 1 H 24  31 63   2H     -0.02    SAI             OD 24  31 65   7H     30.42 AVB wear    25 24  31 79    IC     0.02    CLT       0 24  31 80   1C      0.00    CLT      35 24  31 82   1C      0.17    CLT       0 24  31 82   2C     -0.02    CLT       0 24  32 16   1C     -0.22    CLT      30 24  33 48   7H     32.30 AVB wear    23 24  33 48   7H    111.43 AVBwear     17 24  33 50   7H     57.52 AVB wear    10 24  33 54   7H     31.76 AVBwear     18 24  33 54   7H    111.14 AVB wear    13 24  33 60   7H     58.22 AVB wear    36 24  34 43   3H      0.00    SAI             OD 24  34 43   3H     -0.22    SAI             OD 24  34 61   7H     32.78 AVB wear    16 24  34 61   7H     88.37 AVB wear    25 24  34 79    iC     0.04    CLT      25 24  35 28   1H     -0.07    SAI             OD 24  36 48 2H        0.12    SAI             OD        >2V DOS and SAI-OD @ 2H 24  37 37 3H       -0.12    SAI             OD          SAI-OD @ Wedge @ 3H 24  38 35   3H     -0.03    SAI             OD          SAI-OD   @ Wedge @ 3H 24 38 47    2H 0.06         SAI             OD        >2V DOS and SAI-OD @ 2H 24 38 60    2H -0.02        SAI             OD        >2V DOS and SAI-OD @ 2H 24 39 38    2H 0.00         SAI             OD          SAI-OD @ Wedge @ 2H 24 39 51    7H 35.41 AVB wear        20 24 39 51    7H 67.27 AVB wear        13 24 39 62    7H 100.86 AVB wear       19 24 40 30     1H -0.07       SAI             OD 24 41 33    2H -0.08        SAI             OD          SAI-OD @ Wedge @ 2H 24 42 41    2H 0.06         SAI             OD 24 42 48    2H 0.05         SAI             OD        >2V DOS and SAI-OD @ 2H 24 44 45    2H -0.13        SAI             OD 24 44  45   2H      0.02    SAI             OD
                                          }}