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{{#Wiki_filter:Table 2 Repairable Indication and Tube Status Report TubeDegradation2-12-22-32-4 Number of DIS @ <2v DNT               (Excludes known flaws)39456632182 DIS Overcall Rate100%100%100%100%100%
{{#Wiki_filter:Table 2 DIABLO CANYON UNIT 2 R13 Repairable Indication and Tube Status Report Tube                              Steam Generator Location                                                                                              Total Degradation                      2-1      2-2  2-3    2-4 Number of DIS @ <2v DNT 39        45  66      32        182 (Excludes known flaws)
# of Confirmed SAI-ID in Above DIS00000 Axial PWSCC (New Inds)224 Axial PWSCC (Repeat Inds)444553 DENTED TSP Wedge Region Axial ID/Axial OD 22 Circ PWSCC 11 Circ ODSCC1010 Mixed Mode Axial OD/Circ Mixed Mode Axial ID/Circ 22 Fail PWSCC ARC OA Burst Fail PWSCC ARC DOP >=40% TW 22 Repairable Tubes0140317 DOS > 2.0 V (Inds)2132632 DOS =< 2.0 V (Inds)52843431911632444 TSP ODSCC AONDB @ >5 V Dent 22 GL 95-05 ARC Wedge Region 22 Preventive Plugging <2v DOS 11 Repairable Tubes2332937 Axial PWSCC (New) 22 Axial PWSCC (Repeat)155202666 Axial PWSCC Failed W* Criteria123 Tubesheet Circ PWSCC @ TTS Circ ODSCC @ TTS112 Repairable Tubes11125 Circ PWSCC1113 Outermost Row with DegradationR7R7R8High Row U-bendsAVB Wear >=40%
DIS Overcall Rate                100%     100% 100%   100%       100%
11Cold Leg ThinningThinning >=40%
                              # of Confirmed SAI-ID in Above DIS            0        0    0        0        0 Axial PWSCC (New Inds)                           2            2        4 Axial PWSCC (Repeat Inds)                           44  4        5        53 DENTED TSP                             Wedge Region Axial ID/Axial OD                                           2        2 Circ PWSCC                                               1        1 Circ ODSCC                                10                      10 Mixed Mode Axial OD/Circ Mixed Mode Axial ID/Circ                         2                      2 Fail PWSCC ARC OA Burst Fail PWSCC ARC DOP >=40% TW                             2                      2 Repairable Tubes                    0        14  0        3        17 DOS > 2.0 V (Inds)                   2        1    3      26        32 DOS =< 2.0 V (Inds)                 528      434  319    1163      2444 TSP ODSCC                         AONDB @ >5 V Dent                               2                      2 GL 95-05 ARC                           Wedge Region                                             2        2 Preventive Plugging <2v DOS                                       1        1 Repairable Tubes                    2        3    3      29        37 Axial PWSCC (New)                                             2        2 Axial PWSCC (Repeat)                 15        5    20      26        66 Axial PWSCC Failed W* Criteria              1                      2        3 Tubesheet                       Circ PWSCC @ TTS Circ ODSCC @ TTS                                1    1                  2 Repairable Tubes                    1        1    1        2        5 Circ PWSCC                        1              1        1        3 U-bends Outermost Row with Degradation              R7            R7      R8 High Row U-bends                      AVB Wear >=40%                               1                      1 Cold Leg Thinning                      Thinning >=40%                               2                      2 PLP/FO Wear                            Indications Freespan                Axial ODSCC at Straight Leg Ding                       1                      1 Misc.                             Preventive Total                            Plugged Tubes                      4        22  5      35        66 Numbers reflect the number of tubes affected with degradation, unless (Inds) is noted.
22PLP/FO WearIndicationsFreespanAxial ODSCC at Straight Leg Ding 11Misc.Preventive Plugged Tubes42253566 Numbers reflect the number of tubes affected with degradation, unless (Inds) is noted.
5/2/2006 6:02 PM
DIABLO CANYON UNIT 2 R13 U-bends Steam Generator Total Location Total 5/2/2006 6:02 PM DegradationSGRowColLocation Bobbin Volts+Pt Volts Estimated Depth Estimated Length A VB Wea r2223537H + 60.811.91-40%TW-Cold Leg Thinning2242332C - 0.203.87-46%TW-Axial ODSCC @ Ding222351TSC + 39.840.8225%TW0.44 Circ PWSCC in Ubend248257H + 38-0.7966%TW (1)18.5 deg Axial PWSCC @ Dented TSP226311H - 0.33-1.3660%TW0.25" Circ PWSCC @ Dented TSP2411163H - 0.18-0.4479%TW (1)25.9 degCirc: 1H + 0.05-0.16 40%TW24.9 deg Axial: 1H -0.3 to -0.7-0.4748%TW0.13"Axial ODSCC @ TSP247783H - 0.104.162.89--
Circ ODSCC @ TSP2217294H - 0.08-0.5739%TW (1)25.4 deg Circ ODSCC @ Tubesheet222224TSH - 0.05-0.16TBDTBD Axial PWSCC @ Tubesheet (W*)21762TSH - 1.87-4.91TBD0.92 Note: Significance for SCC Indications determined by +Point Voltage, except for bobbin coil ARC, AVB Wear and CLT.
(1)  Estimated depth is at maximum +Point amplitude.


(2) Separation distance is 0.24", therefore defined as "interacting", per PWSCC ARC criteria.
Table 3 Most Significant Indications DCPP 2R13 (Preliminary Results)
DCPP 2R13 (Preliminary Results)
Bobbin            Estimated      Estimated Degradation                SG    Row      Col          Location                  +Pt Volts Volts                Depth        Length AVB Wear                                22      23    53          7H + 60.81        1.91        -      40%TW              -
Most Significant Indications Table 3Mixed Mode (ID Axial + Circ) (2)221030 AREVA Tube Integrity Engineering Daily Results: 5/2/2006 6:04 PM}}
Cold Leg Thinning                      22      42    33          2C - 0.20        3.87        -      46%TW              -
Axial ODSCC @ Ding                      22      23    51        TSC + 39.84                  0.82      25%TW            0.44 Circ PWSCC in Ubend                    24      8    25            7H + 38            -      0.79    66%TW (1)      18.5 deg Axial PWSCC @ Dented TSP                22      6    31          1H - 0.33          -      1.36      60%TW          0.25" Circ PWSCC @ Dented TSP                24      11    16          3H - 0.18          -      0.44    79%TW (1)      25.9 deg Circ: 1H + 0.05        -      0.16      40%TW          24.9 deg Mixed Mode (ID Axial + Circ) (2)    22      10    30 Axial: 1H -0.3 to -0.7    -      0.47      48%TW          0.13" Axial ODSCC @ TSP                      24      7    78          3H - 0.10        4.16      2.89        -              -
Circ ODSCC @ TSP                        22      17    29          4H - 0.08          -      0.57    39%TW (1)      25.4 deg Circ ODSCC @ Tubesheet                  22      22    24          TSH - 0.05          -      0.16        TBD            TBD Axial PWSCC @ Tubesheet (W*)            21      7    62          TSH - 1.87          -      4.91        TBD            0.92 Note: Significance for SCC Indications determined by +Point Voltage, except for bobbin coil ARC, AVB Wear and CLT.
(1) Estimated depth is at maximum +Point amplitude.
(2) Separation distance is 0.24", therefore defined as "interacting", per PWSCC ARC criteria.
AREVA Tube Integrity Engineering                                                                                   Daily Results: 5/2/2006 6:04 PM}}

Latest revision as of 15:45, 23 November 2019

SG Tube Inspection Summary, Table 2 & 3
ML062370008
Person / Time
Site: Diablo Canyon Pacific Gas & Electric icon.png
Issue date: 05/02/2006
From:
NRC/NRR/ADRO/DORL/LPLIV
To:
Wang, A., DORL/LPLIV, 415-1445
Shared Package
ML062370004 List:
References
Download: ML062370008 (2)
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Text

Table 2 DIABLO CANYON UNIT 2 R13 Repairable Indication and Tube Status Report Tube Steam Generator Location Total Degradation 2-1 2-2 2-3 2-4 Number of DIS @ <2v DNT 39 45 66 32 182 (Excludes known flaws)

DIS Overcall Rate 100% 100% 100% 100% 100%

  1. of Confirmed SAI-ID in Above DIS 0 0 0 0 0 Axial PWSCC (New Inds) 2 2 4 Axial PWSCC (Repeat Inds) 44 4 5 53 DENTED TSP Wedge Region Axial ID/Axial OD 2 2 Circ PWSCC 1 1 Circ ODSCC 10 10 Mixed Mode Axial OD/Circ Mixed Mode Axial ID/Circ 2 2 Fail PWSCC ARC OA Burst Fail PWSCC ARC DOP >=40% TW 2 2 Repairable Tubes 0 14 0 3 17 DOS > 2.0 V (Inds) 2 1 3 26 32 DOS =< 2.0 V (Inds) 528 434 319 1163 2444 TSP ODSCC AONDB @ >5 V Dent 2 2 GL 95-05 ARC Wedge Region 2 2 Preventive Plugging <2v DOS 1 1 Repairable Tubes 2 3 3 29 37 Axial PWSCC (New) 2 2 Axial PWSCC (Repeat) 15 5 20 26 66 Axial PWSCC Failed W* Criteria 1 2 3 Tubesheet Circ PWSCC @ TTS Circ ODSCC @ TTS 1 1 2 Repairable Tubes 1 1 1 2 5 Circ PWSCC 1 1 1 3 U-bends Outermost Row with Degradation R7 R7 R8 High Row U-bends AVB Wear >=40% 1 1 Cold Leg Thinning Thinning >=40% 2 2 PLP/FO Wear Indications Freespan Axial ODSCC at Straight Leg Ding 1 1 Misc. Preventive Total Plugged Tubes 4 22 5 35 66 Numbers reflect the number of tubes affected with degradation, unless (Inds) is noted.

5/2/2006 6:02 PM

Table 3 Most Significant Indications DCPP 2R13 (Preliminary Results)

Bobbin Estimated Estimated Degradation SG Row Col Location +Pt Volts Volts Depth Length AVB Wear 22 23 53 7H + 60.81 1.91 - 40%TW -

Cold Leg Thinning 22 42 33 2C - 0.20 3.87 - 46%TW -

Axial ODSCC @ Ding 22 23 51 TSC + 39.84 0.82 25%TW 0.44 Circ PWSCC in Ubend 24 8 25 7H + 38 - 0.79 66%TW (1) 18.5 deg Axial PWSCC @ Dented TSP 22 6 31 1H - 0.33 - 1.36 60%TW 0.25" Circ PWSCC @ Dented TSP 24 11 16 3H - 0.18 - 0.44 79%TW (1) 25.9 deg Circ: 1H + 0.05 - 0.16 40%TW 24.9 deg Mixed Mode (ID Axial + Circ) (2) 22 10 30 Axial: 1H -0.3 to -0.7 - 0.47 48%TW 0.13" Axial ODSCC @ TSP 24 7 78 3H - 0.10 4.16 2.89 - -

Circ ODSCC @ TSP 22 17 29 4H - 0.08 - 0.57 39%TW (1) 25.4 deg Circ ODSCC @ Tubesheet 22 22 24 TSH - 0.05 - 0.16 TBD TBD Axial PWSCC @ Tubesheet (W*) 21 7 62 TSH - 1.87 - 4.91 TBD 0.92 Note: Significance for SCC Indications determined by +Point Voltage, except for bobbin coil ARC, AVB Wear and CLT.

(1) Estimated depth is at maximum +Point amplitude.

(2) Separation distance is 0.24", therefore defined as "interacting", per PWSCC ARC criteria.

AREVA Tube Integrity Engineering Daily Results: 5/2/2006 6:04 PM

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