ML070680087

Vym 99/148, ASME Section XI Subsection IWE Report on Evaluation of 1998 Torus Inspections, 11/29/1999, Appendix B, Appendix C, Appendix D (Part 2)

ML070680087
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	11/29/1999
From:	- No Known Affiliation
To:	Office of Nuclear Reactor Regulation
References
Download: ML070680087 (31)

Text

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1998 IWE TORUS INSPECTION REPORT

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APPENDIX B BOTTOM TEST STRIPS BAYS 8 AND 16 PLOTS OF UT THICKNESS READINGS AND EVALUATION OF PLATE THICKNESS VAR IAT10N

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1998 IWE Torus Inspection Report Appendix C: Evaluation of Permenant Grid Locations

-Y Location UT Measured Acceptance Margin d

Margin Ave. Thickness

-2.

QA Identifier Thickness Criteria (inch) (percent) Circumferential (inch)

Note 1 (inch)

Note 2 Note 3 Note 4 Stress (inch)

Note 5 z

BAY1-A01 0.601 0.570 0.031 5.44 BAY1-A02 0.615 0.570 0.045 7.89 BAY1-A03 0.61 4 0.570 0.044 7.72 BAY1-A04 0.593 0.570 0.023 4.04 0.606 BAY1-A05 0.595 0.574 0.021 3.66 BAY1-A06 0.604 0.574 0.030 5.23 BAY 1-A07 0.607 0.574 0.033 5.75 BAY 1-A08 0.602 0.574 0.028 4.88 0.602 BAY1-A09 0.591 0.574 0.017 2.96 BAY1-A10 0.594 0.574 0.020 3.48 BAY 1-AI 1 0.595 0.574 0.021 3.66 BAY 1-AI 2 0.597 0.574 0.023 4.01 0.594 BAY1-A13 0.597 0.570 0.027 4.74 BAY1-A14 0.598 0.570 0.028 4.91 BAY1-AI 5 0.590 0.570 0.020 3.51 BAY 1-AI 6 0.594 0.570 0.024 4.21 0.595 BAY2-A01 0.577 0.570 0.007 1.23 BAY2-A02 0.622 0.570 0.052 9.12 BAY2-AO3 0.623 0.570 0.053 9.30 BAY2-AO4 0.595 0.570 0.025 4.39 0.604 BAY2-A05 0.583 0.574 0.009 1.57 BAY2-A06 0.625 0.574 0.051 8.89 BAY2-AO7 0.627 0.574 0.053 9.23 BAY2-AO8 0.594 0.574 0.020 3.48 0.607 BAY2-AO9 0.610 0.574 0.036 6.27 BAY2-A10 0.611 0.574 0.037 6.45 BAY2-AlI 0.596 0.574 0.022 3.83 BAY2-A12 0.599 0.574 0.025 4.36 0.604 BAY2-AI3 0.614 0.570 0.044 7.72 BAY2-AI4 0.613 0.570 0.043 7.54 BAY2-Al5 0.594 0.570 0.024 4.21 BAY2-Al6 0.597 0.570 0.027 4.74 0.605 BAY2-AI7 0.575 0.566 0.009 1.59 BAY2 A I 8 0.577 0.559 0.018 3.22 Page 1 of 9

1998 IWE Torus Inspection Report Appendix C: Evaluation of Permenant Grid Locations Location UT Measured Acceptance Margin Margin Ave. Thickness Identifier Thickness Criteria (inch) (percent) Circumferential (inch) (inch) Note 3 Note 4 Stress (inch)

Note 1 Note 2 Note 5 BAY3-A01 0.594 0.570 0.024 4.21 BAY3-A02 0.61 6 0.570 0.046 8.07 BAY3-A03 0.613 0.570 0.043 7.54 BAY3-A04 0.604 0.570 0.034 5.96 0.607 BAY3-A05 0.600 0.574 0.026 4.53 BAY3-AO6 0.625 0.574 0.051 8.89 BAY3-A07 0.621 0.574 0.047 8.19 BAY3-A08 0.608 0.574 0.034 5.92 0.614 BAY3-AO9 0.612 0.574 0.038 6.62 BAY3-A10 0.61 8 0.574 0.044 7.67 BAY3-All 0.600 0.574 0.026 4.53 BAY3-Al2 0.604 0.574 0.030 5.23 0.609 BAY3-Al3 0.608 0.570 0.038 6.67 BAY3-A14 0.614 0.570 0.044 7.72 BAY3-AI 5 0.600 0.570 0.030 5.26 BAY3-AI6 0.599 0.570 0.029 5.09 0.605 BAY4-A01 0.601 0.570 0.031 5.44 BAY4-A02 0.631 0.570 0.061 10.70 BAY4-AO3 0.634 0.570 0.064 11.23 BAY4-AO4 0.603 0.570 0.033 5.79 0.617 BAY4-AO5 0.607 0.574 0.033 5.75 BAY4-A06 0.630 0.574 0.056 9.76 BAY4-AO7 0.636 0.574 0.062 10.80 BAY4-AO8 0.601 0,574 0.027 4.70 0.619 BAY4-AO9 0.606 0.574 0.032 5.57 BAY4-A10 0.609 0.574 0.035 6.10 BAY4-All 0.574 0.574 0,000 0.00 BAY4-Al2 0.573' 0.574 -0.001 -0.17 0.591 BAY4-Al3 0.610 0.570 0.040 7.02 BAY4-AI4 0.613 0.570 0.043 7.54 BAY4-A15 0.576 0.570 0.006 1.05 BAY4-Al6 0.576 0.570 0.006 1.05 0.594 BAY4-Al7 0.576 0.566 0.010 1.77 BAY4-Al8 0.581 0.559 0.022 3.94 Page 2 of 9

1998 IWE Torus Inspection Report Appendix C: Evaluation of Permenant Grid Locations Location UT Measured Acceptance Margin Margin Ave. Thickness Identifier Thickness Criteria (inch) (percent) Circumferential (inch) (inch) Note 3 Note 4 Stress (inch)

Note 1 Note 2 Note 5 BAY5-A01 0.594 0.570 0.024 4.21 BAY5-A02 0.629 0.570 0.059 10.35 BAY5-AO3 0.634 0.570 0.064 11.23 BAY5-A04 0.592 0.570 0.022 3.86 0.61 2 BAY5-A05 0.592 0.574 0.01 8 3.14 BAY5-A06 0.631 0.574 0.057 9.93 BAY5-A07 0.632 0.574 0.058 10.10 BAY5-AO8 0.588 0.574 0.014 2.44 0.611 BAY5-AO9 0.596 0.574 0.022 3.83 BAY5-A10 0.597 0.574 0.023 4.01 BAYS-A11 0.599 0.574 0.025 4.36 BAY5-Al2 0.597 0.574 0.023 4.01 0.597 BAY5-A13 0.595 0.570 0.025 4.39 BAY5-Al4 0.597 0.570 0.027 4.74 BAY5-Al5 0.596 0.570 0.026 4.56 BAY5-A16 0.596 0.570 0.026 4.56 0.596 BAY6-A01 0.588 0.570 0.01 8 3.16 BAY6-AO2 0.612 0.570 0,042 7.37 BAY6-A03 0.61 1 0.570 0.041 7.1 9 BAY6-A04 0.594 0.570 0.024 4.21 0.601 BAY6-AO5 0.584 0.574 0.01 0 1.74 BAY6-AO6 0.61 7 0.574 0,043 7.49 BAY6-A07 0.617 0.574 0.043 7.49 BAY6-AO8 0.594 0.574 0.020 3.48 0.603 BAY6-A09 0.607 0.574 0.033 5.75 BAY6-A10 0.604 0.574 0.030 5.23 BAY6-A11 0.61 1 0.574 0.037 6.45 BAY6-A12 0.608 0.574 0.034 5.92 0.608 BAY6-Al3 0.601 0.570 0.031 5.44 BAY6-Al4 0.600 0.570 0.030 5.26 BAY6-A15 0.617 0.570 0.047 8.25 BAY6-A 16 0.613 0.570 0.043 7.54 0.608 Page 3 of 9

1998 IWE Torus Inspection Report Appendix C: Evaluation of Permenant Grid Locations Location UT Measured Acceptance Margin Margin Ave. Thickness Identifier Thickness Criteria (inch) (percent) Circumferential (inch) (inch) Note 3 Note 4 Stress (inch)

Note 1 Note2 . Note 5 BAY7-A01 0,578 0.570 0.008 1.40 BAY7-A02 0.622 0.570 0.052 9.12 BAY7-A03 0.627 0.570 0.057 10.00 BAY7-AO4 0.596 0.570 0.026 4.56 0.606 BAY7-A05 0.577 0.574 0.003 0.52 BAY7-AO6 0.61 9 0.574 0.045 7.84 BAY7-AO7 0.624 0.574 0.050 8.71 BAY7-AO8 0.599 0.574 0.025 4.36 0.605 BAY7-AO9 0.600 0.574 0.026 4.53 BAY7-AI 0 0.600 0.574 0.026 4.53 BAY7-A11 0.592 0.574 0.018 3.14 BAY7-Al2 0.591 0.574 0.017 2.96 0.596 BAY7-A13 0.598 0.570 0.028 4.91 BAY7-Al4 0.592 0.570 0.022 3.86 BAY7-AI 5 0.596 0.570 0.026 4.56 BAY7-Al6 0.597 0.570 0.027 4.74 0.596 BAY7-A17 0.581 0.566 0.015 2.65 BAY7-Al8 0.581 0.559 0.022 3.94 BAYB-A01 0.583 0.570 0.013 2.28 BAY8-A02 0.61 5 0.570 0.045 7.89 BAY8-AO3 0.614 0.570 0.044 7.72 BAY8-A04 0.606 0.570 0.036 6.32 0.605 BAY8-A05 0.586 0.574 0.012 2.09 BAY8-A06 0.609 0.574 0.035 6.10 BAY8-A07 0.613 0.574 0.039 6.79 BAY8-A08 0.607 0.574 0.033 5.75 0.604 BAY8-AO9 0.608 0.574 0.034 5.92 BAY8-A10 0.607 0.574 0.033 5.75 BAY8-Al1 0.605 0.574 0.031 5.40 BAY8-Al2 0.598 0.574 0.024 4.18 0.605 BAY8-A13 0.608 0.570 0.038 6.67 BAY8-Al4 0.607 0.570 0.037 6.49 BAY8-Al5 0.601 0.570 0.031 5.44 BAY8-A16 0.603 0.570 0.033 5.79 0.605 Page 4 of 9

1998 IWE Torus Inspection Report Appendix C: Evaluation of Permenant Grid Locations Location UT Measured Acceptance Margin Margin Ave. Thickness Identifier Thickness Criteria (inch) (percent) Circumferential (inch) (inch) Note 3 Note 4 Stress (inch)

Note 1 Note 2 Note 5 BAY9-A01 0.594 0.570 0.024 4.21 BAY9-AO2 0.610 0.570 0.040 7.02 BAY9-A03 0.609 0.570 0.039 6.84 BAY9-AO4 0.599 0.570 0.029 5.09 0.603 BAY9-AO5 0.590 0.574 0.01 6 2.79 BAY9-A06 0.606 0.574 0.032 5.57 BAY9-A07 0.601 0.574 0.027 4.70 BAY9-AO8 0.596 0.574 0.022 3.83 0.598 BAY9-A09 0.599 0.574 0.025 4.36 BAY9-A10 0.600 0.574 0.026 4.53 BAYS-A11 0.582 0.574 0.008 1.39 BAY9-AI2 0.593 0.574 0.019 3.31 , 0,594 BAY9-Al3 0.601 0.570 0.031 5.44 BAYS-A14 0.601 0.570 0.031 5.44 e* 0.570 0.023 4.04 BAYS-A15 0.593

! BAYS-A16 0.591 0.570 0.021 3.68 0.597 BAY10-A01 0.585 0.570 0.01 5 2.63 BAY1O-A02 0.629 0.570 0.059 10.35 BAY 10-A03 0.631 0.570 0.061 10.70 BAY10-A04 0.584 0.570 0.01 4 2.46 0.607 BAY 10-A05 0.586 0.574 0.012 2.09 BAY10-A06 0.628 0.574 0.054 9.41 BAY10-A07 0.629 0.574 0.055 9.58 BAY10-A08 0.583 0.574 0.009 1.57 0.607 BAY10-A09 0.598 0.574 0.024 4.1 8 BAY10-A10 0.597 0.574 0.023 4.01 BAY1O-A11 0.598 0.574 0,024 4.1 8 BAY1O-A12 0.596 0.574 0.022 3.83 0.597 BAY1O-AI 3 0.593 0.570 0.023 4.04 BAY1O-A14 0.592 0.570 0.022 3.86 BAY1O-A15 0.594 0.570 0.024 4.21 BAY1O-A16 0.595 0.570 0.025 4.39 0.594 BAY1O-A17 0.588 0.566 0.022 3.89 BAY1O-A18 0.589 0.559 0.030 5.37 Page 5 of 9

1998 IWE Torus Inspection Report Appendix C: Evaluation of Permenant Grid Locations Location UT Measured Acceptance Margin Margin Ave. Thickness Identifier Thickness Criteria (inch) (percent) Circumferential (inch) (inch) Note 3 Note 4 Stress (inch)

Note 1 Note 2 Note 5 BAY 11-A01 0.586 0.570 0.016 2.81 BAY 11-A02 0.618 0.570 0.048 8.42 BAY11-A03 0.617 0.570 0.047 8.25 BAY11-A04 0.594 0.570 0.024 4.21 0.604 BAY1I-A05 0.588 0.574 0.014 2.44 BAY11-A06 0.621 0.574 0.047 8.19 BAY11-A07 0.61 8 0.574 0.044 7.67 BAY11-A08 0.592 0.574 0.01 8 3.14 0.605 BAY11-A09 0.585 0.574 0.01 1 1.92 BAY11-A10 0.586 0.574 0.012 2.09 BAY11-A1 1 0.602 0.574 0.028 4.88 BAY11-A12 0.601 0.574 0.027 4.70 0.594 BAY11-A13 0.587 0.570 0.017 2.98 BAY11-A14 0.589 0.570 0.019 3.33 BAY11-A15 0.598 0.570 0.028 4.91 BAY11-A16 0.598 0.570 0.028 4.91 0.593 BAY12-A01 0.609 0.570 0.039 6.84 BAY12-A02 0.642 0.570 . 0.072 12.63 BAY12-A03 0.640 0.570 0.070 12.28 BAY12-A04 0.593 0.570 0.023 4.04 0.621 BAY12-A05 0.61 0 0.574 0,036 6.27 BAY12-A06 0.636 0.574 0.062 10.80 BAY12-A07 0.633 0.574 0.059 10.28 BAY12-A08 0.588 0.574 0.014 2.44 0.61 7 BAY12-A09 0.594 0.574 0.020 3.48 BAY12-A10 0.596 0.574 0.022 3.83 BAYl2-A11 0.61 8 0.574 0.044 7.67 BAY12-A12 0.61 0 0.574 0.036 6.27 0.605 BAY12-A13 0.595 0.570 0.025 4.39 BAY12-A14 0.596 0.570 0.026 4.56 BAY12-A15 0.612 0.570 0.042 7.37 BAY12-A16 0.607 0.570 0.037 6.49 0.603 Page 6 of 9

1998 IWE Torus inspection Report Appendix C: Evaluation of Permenant Grid Locations Location UT Measured Acceptance Margin Margin Ave. Thickness Identifier Thickness Criteria (inch) (percent) Circumferential (inch) (inch) Note 3 Note 4 Stress (inch)

Note 1 Note 2 Note 5 BAY13-A01 0.595 0.570 0.025 4.39 BAY13-A02 0.632 0.570 0.062 10.88 BAY 13-A03 0.633 0.570 0.063 11.05 BAY13-AO4 0.601 0.570 0.031 5.44 0.61 5 BAY13-A05 0.597 0.574 0.023 4.01 BAY13-A06 0.639 0.574 0.065 11.32 BAY13-A07 0.641 0.574 0.067 11.67 BAY13-A08 0.603 0.574 0.029 5.05 0.620 BAY13-A09 0.599 0.574 0.025 4.36 BAY13-A10 0.595 0.574 0.021 3.66 BAY13-A11 0.585 0.574 0.01 1 1.92 BAY1&A12 0.585 0.574 0.01 1 1.92 0.591 BAY13-Al3 0.599 0.570 0.029 5.09 BAY13-A14 0.596 0.570 0.026 4.56 BAY13-A15 0.586 0.570 0.01 6 2.81 BAY13-A16 0.585 0.570 0.015 2.63 0.592 BAY14-A01 0.591 0.570 0.021 3.68 BAY14-A02 0.626 0.570 0.056 9.82 BAY14-A03 0.625 0.570 0.055 9.65 BAY14-A04 0.590 0.570 0.020 3.51 0.608 BAY14-A05 0.573 0.574 -0.001 -0.17 BAY14-A06 0.613 0.574 0.039 6.79 BAY14-A07 0.614 0.574 0.040 6.97 BAY14-A08 0.596 0.574 0.022 3.83 0.599 BAY14-A09 0.597 0.574 0.023 4.01 BAY14-A10 0.598 0.574 0.024 4.18 BAY14-A11 0.590 0.574 0.016 2.79 BAY14-A12 0.595 0.574 0.021 3.66 0.595 BAY14-A13 0.594 0.570 0.024 4.21 BAY14-AI4 0.594 0.570 0.024 4.21 BAY14-A15 0.590 0.570 0.020 3.51 BAY14-A16 0.594 0.570 0.024 4.21 0.593 BAY14-A17 0.592 0.566 0.026 4.59 BAY14-Al8 0.593 0.559 0.034 6.08

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Page 7 of 9

1998 IWE Torus Inspection Report Appendix C: Evaluation of Permenant Grid Locations Location UT Measured Acceptance Margin Margin Ave. Thickness Identifier Thickness Criteria (inch) (percent) Circumferential (inch) (inch) Note 3 Note 4 Stress (inch)

Note 1 Note 2 Note 5 BAY15-AO1 0.585 0.570 0.015 2.63 BAY15-A02 0.604 0.570 0.034 5.96 BAY15-A03 0.605 0.570 0.035 6.14 BAY15-A04 0.597 0.570 0.027 4.74 0.598 BAY15-A05 0.589 0.574 0.01 5 2.61 BAY15-A06 0,609 0.574 0.035 6.1 0 BAY15-A07 0.610 0.574 0.036 6.27 BAY15-A08 0.599 0.574 0.025 4.36 0.602 BAY15-A09 0.582 0.574 0.008 1.39 BAY15-A10 0.582 0.574 0.008 1.39 BAY15-Al1 0.607 0.574 0.033 5.75 BAY15-Al2 0.606 0.574 0.032 5.57 0.594 BAY15-Al3 0.584 0.570 0.014 2.46 BAY15-A14 0.580 0.570 0.01 0 1.75 BAY15-A15 0.605 0.570 0.035 6.14 BAY15-A16 0.604 0.570 0.034 5.96 0.593 BAY15-Al7 0.587 0.566 0.021 3.71 BAY15-Al8 0.581 0.559 0.022 3.94 BAY16-A01 0.587 0,570 0.01 7 2.98 BAY16-A02 0.613 0.570 0.043 7.54 BAY16-A03 0.61 5 0.570 0.045 7.89 BAY16-A04 0.601 0.570 0.031 5.44 0.604 BAY16-A05 0.587 0.574 0.013 2.26 BAY16-A06 0.61 6 0.574 0.042 7.32 BAY16-A07 0.61 9 0.574 0.045 7.84 BAY16-A08 0.611 0.574 0.037 6.45 0.608 BAY16-A09 0.601 0.574 0.027 4.70 BAY16-A10 0.607 0.574 0.033 5.75 BAY16-Al1 0.613 0.574 0.039 6.79 BAY16-A12 0.61 0 0.574 0.036 6.27 0.608 BAY16-A13 0.597 0.570 0.027 4.74 BAY16-A14 0.602 0.570 0.032 5.61 BAY 16-A15 0.61 1 0.570 0.041 7.19 BAY16-A16 0.585 0.570 0.01 5 2.63 0.599 Maximum 0.642 0.072 12.632 0.621 Minimum 0.573 -0.001 -0.1 74 0.591 Page 8 of 9

1998 !WE Torus Inspection Report Appendix C: Evaluation of Permenant Grid Locations Location UT Measured Acceptance Margin Margin Ave. Thickness Identifier Thickness Criteria (inch) (percent) Circumferential (inch) (inch) Note 3 Note 4 Stress (inch)

Note 1 Note 2 Note 5 NOTES 1 After sandblasting thickness measurement.

2 General area corrosion acceptance criteria from VYC-1032, Revision 1.

3 = UT measurement - Acceptance Criteria 4 = % Over Acceptance Criteria 5 = ave. for Circ. Stress (measurments along horizontal line).

Page 9 of 9

I V.Y. 1998 ASME SECTION XI SUBSECTION IWE REPORT ON EVALUATION OF TORUS INSPECTIONS APPENDIX D: EVALUATION OF UT DATA FOR GROUP 3 LOCAL AREA INSPECTIONS

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Appendix IS1 Report No. Location Description inspection Data Screening Results / Comments A Statistics.

TAB No. (Thickness, Inches) 10 YA-UT-112-125 Bay 4: Bottom 8 discrete locations: Row 4A Max. = 0.644" All readings above bottom centerline Plate Thickness (Figure 2.5) Min. = 0.602" min. wall = 0.584" Under Baffle Ave. = 0.623" Plates. No engineering evaluation required.

YA-UT-112-126 Bay 15: 8 discrete locations at Row Max. = 0.599 All readings above bottom centerline Torus Bottom Plate 15A(Figure 2.5) Min. = 0.586 min. wall = 0.584" Thickness Under Ave. = 0.592" Baffle Plates. No engineering evaluation required.

8 discrete locations at Row Max. = 0.61 0" 15B(Figure 2.5) Min. = 0.596" Ave. = 0.61 3" 11 YA-UT-112-127 Bay 7: Local 8 discrete locations adjacent Max. = 0.595" Confirmatory readings performed during indications at to round indication 27" from Min. = 0.592" Torus coating efforts, indications were temporary opening. bottom of opening. Ave. = 0.594" weld repaired as required, see WPC W-NCR17. All readings above bottom centerline min. wall = 0.584".

YA-UT-112-129 11 discrete locations adjacent to gouge at top of Max. = 0.594" No engineering evaluation required.

opening. Min. = 0.589" Ave. = 0.591" 12 (3/31/98) -

Bay 1 Area 1: 3x8" strip of moderate M a . = 0.61 5" All readings above bottom centerline min. wall = 0.584" As-found Local corrosion located 6 from Min. = 0.606 Area UT bottom seam weld and lo" Ave. =0.610 Examination from bay 1611 ring girder. No engineering evaluation required.

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v V.Y. 1998 ASME SECTION XI SUBSECTION IWE REPORT ON EVALUATION OF TORUS INSPECTIONS APPENDIX D: EVALUATION OF UT DATA FOR GROUP 3 LOCAL AREA INSPECTIONS Appendix IS1 Report No. Location Description Inspection Data Screening Results / Comments A Statistics.

TAB No. (Thickness, Inches) 13 YA-UT-112-27 Bay2-Areal: Single pit ( was identified Max. = 0.609 All readings above bottom centerline As-found Local previously from under water Min. = 0.591 min. wall = 0.584 Area UT visual coating inspection Ave. =0.606 Examination 9/96). No engineering evaluation required.

6x6 grid located 11-6 toward Torus ID and 18 from mid bay seam weld.

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14 YA-UT-112-131 -

Bay 2 Area 2: 4 x 5 area of moderate M a . = 0.574 All readings above code minimum wall YA-UT-112-133 As-found Local corrosion and pitting Min. = 0.567 thickness at this location. See Table 3.1 Area UT previously marked as 93-07, Ave. = 0.571 Permanent grid measurements on the Examination located 20-10 from bottom same average 0.578 seam weld and 9 from bay 2/3 ring girder. No engineering evaluation required.

(6x6 square area, expanded to 12x12 area)

Post-Sandblast.

15 YA-UT-112-26 Bay 5 -Area 1: 9xI 2 area of numerous Max. = 0.602 Note: identified as Bay 5 - Area 2 on YA-UT-112-46 As-found Local small pits and minor Min. = 0.585 As-found Visual Examination (Appendix Area UT corrosion located 43 from Ave. = 0.596 A ,Tab 1)

Examination. bay 516 ring girder and 5 6 Bay 5 -Area 1: from bottom seam weld. All readings above bottom centerline Confirmatory (13 x 15 area 1 grids ) min. wall = 0.584.

Readings No engineering evaluation required.

16 YA-UT-112-25 -

Bay 5 Area 2: Areas of minor oxidation & Max. = 0.599 Identified as Bay 5 - Area 3 on As-found YA-UT-112-46 As-found Local degraded coating 2 6 from Min. = 0.586 Visual Examination (Appendix A ,Tab 1)

Area UT bay 4/5 ring girder and 145 Ave. = 0.596 Examination from bottom seam weld. All readings above bottom centerline Bay 5 - Area 2: (26x26 area 1 grids) min. wall = 0.584.

Confirmatory Readings No engineering evaluation required.

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V.Y. 1998 ASME SECTION XI SUBSECTION IWE REPORT ON EVALUATION OF TORUS INSPECTIONS APPENDIX D: EVALUATION OF UT DATA FOR GROUP 3 LOCAL AREA INSPECTIONS Appendix IS1 Report No. Location Description Inspection Data Screening Results / Comments A Statistics.

TAB No. (Thickness, Inches) 17 YA-UT-112-67 Bay 5 - Area 1 60x12 strip of moderate Max. = 0.644 Identified as Bay 1 - Area 1 on As-found YA-UT-112-68 (Inside) corrosion located 5 6 from Min. = 0.583 Visual Examination (Appendix A ,Tab As-found Local bay 516 ring girder along Ave. = 0.613 1)1UT readings from interior surface.

Area UT seam weld. (2 grids) 4 of 180 UT readings at 0.583 are Examination below code min. wall of 0.584 Lowest measured thickness is 99.8% of code min wall.

All readings above bottom acceptance criteria of 0.574. See Table 3.1.

No engineering evaluation required.

18 YA-UT-112-48 Bay 12 -Area 1: 6x6strip of moderate Max. = 0.595 All readings above bottom centerline As-found Local corrosion 21 from bay Min. = 0.590 min. wall = 0.584 Area UT 11/12 ring girder, and 8 8 Ave. = 0.592 Examination. from bottom seam weld. No engineering evaluation required.

Bay 12 - Area 2:

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19 YA-UT-112-24 24x12 area of minor Max. = 0.61 9 Minimum value of 0.570 is greater YA-UT-112-46 As-found Local corrosion located 6ft. from Min. = 0.570 than acceptance criteria from Table 3.1 YA-UT-112-47 Area UT bay 11/12 ring girder and Ave. = 0.595 for distance of 7 feet from bottom center Examination. approx. 9 0 from bottom of Torus. = 569. Locations of thinnest

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Bay 12 Area 2: seam weld. (1 grids) readings are oriented in the Confirmatory circumferential direction & may be due Readings (26DL+) to rolling of plates.

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Bay 12 Area 2:

Confirmatory No engineering evaluation required.

Readings (A-Scan) 20 (4/1/99) Bay 15-Area 1: 8 x 8 area of moderate M a . = 0.603 All readings above bottom centerline As-found Local corrosion. Located 14 from Min. = 0.597 min. wall = 0.584 Area UT bay 15/14 ring girder Ave. = 0.600 Examination approx. 19-6 from bottom No engineering evaluation required.

seam weld.

(area was previously marked 93-16)

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V.Y. 1998 ASME SECTION XI SUBSECTION IWE REPORT ON EVALUATION OF TORUS INSPECTIONS APPENDIX D: EVALUATION OF UT DATA FOR GROUP 3 LOCAL AREA INSPECTIONS Appendix Description Inspection Data Screening Results I Comments A Statistics.

TAB No. (Thickness, Inches) 21 (411/99) -

Bay 15 Area 2: 6 x 6 area of moderate Max. = 0.603 Minimum value of 0.543 is greater As-found Local corrosion. Located 6 from Min. = 0.543" than acceptance criteria from Table 3.1 Area UT bay 15/14 ring girder Ave. = 0.597" for distance of 19.0 feet from bottom Examination approx. 19'-10" from bottom center of Torus ( =.534"). Single low seam weld. reading is characterized as less than (area was previously diameter of transducer (.312). Adjacent marked 93-16) measurements are approx. 0.600 No engineering evaluation required.

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