Text

54-PQ-114-001, Technical Justification, Phased Array Ultrasonic Examination of Dry Storage Canister Lid Welds. Part 2 of 3
	ML16035A186
Person / Time
Site:	Monticello
Issue date:	01/30/2015
From:	Hacker M G, Key M W, Richards T; AREVA
To:	; Division of Spent Fuel Management, Office of Nuclear Reactor Regulation
Shared Package
ML16035A214	List: ML16035A184; ML16035A185; ML16035A186; ML16035A187;
References
	L-MT-16-003, TAC L25058 54-PQ-114-001
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A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001 5.4 Personnel Qualifications:

Personnel performing data analysis are recognized as an influential variable in the examination.

In order to assure predictable performance, data analysis personnel are certified to a Level II or Level Ill and are qualified for flaw detection and flaw sizing by performance demonstration in accordance with Reference 10.3.5.5 Examination Sensitivity:

Examination sensitivity is a parameter controlled by the examination procedure and developed from modeling of the flaw responses as described in Reference 10.2 and laboratory testing using the development mockup.During the feasibility study conducted to model flaw response from various postulated flaws, a 1 mm (0.039") side drilled hole was used as a reference.

Flaw response was compared to the reference response and determined to be comparable.

During the development using the flawed mockup and phased array transducers, a 1.6mm (.0625") side drilled hole was used. It was determined through the development work that the 1.6mm side drilled hole provides the necessary sensitivity to adequately detect the weld manufacturing flaws in the mockup. The technique used to set the sensitivity involves setting the response from the side drilled hole providing the highest amplitude for each focal depth used (beam angle set to 00) to approximately 80% full screen. Figure 5-44 shows the responses from the 1.6mm side drilled holes located at different depths in the reference block using the detection probe with a 0.5" focal depth.Figure 5-45 shows the responses from the 1.6mm side drilled holes located at different depths in the reference block using the detection probe with a 0.85" focal depth As observed from the responses shown in these figures, the two focal depths selected for the examination provide good sensitivity over the examination volume (0.34" to 1.25"). The flaw detection results using these parameters are included in Section 8 of this document.5.6 Transducer Frequency:

The sound field imaging and flaw response simulation performed as part of the feasibility study described in Reference 10.2, identified two transducer frequencies needed for the examination.

Due to the coarse grain structure of austenitic stainless steel welds, frequency and wavelength become important variables that must be carefully selected to provide the needed signal to noise ratio from flaw responses.

For this application, 3.5MHz was selected for flaw detection because it provided the needed penetration for the thicker OTCP lid weld while providing the necessary resolution to resolve the smaller flaw responses from grain noise. In addition, the lower frequency is more tolerant of flaw mis-orientation angles improving detection of poorly oriented flaws relative to the intercepting beam. Testing conducted on the development mockup confirm that the 3.5MHz transducer is capable of detecting the range of flaws included in the mockup in both the ITCP and OTCP lid welds.Because flaw dimensioning requires the highest resolution possible, given the grain size of the weld metal, a frequency of 5.0MHz was selected.

The 5.0MHz transducer was proven capable of sizing all of the flaws in both welds with very good accuracy.

These results are included in Section 8 of this document.

In cases where the 5.0MHZ transducer does not provide the necessary 4:1 signal to noise ratio to dimension the Page 41 of 115 A ARE VA Technical Justification SPhased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001 flaw, the 3.5MHz transducer should be used to improve the signal to noise ratio for dimensioning.

0O.045tn Figure 5-44 -Sensitivity Profile for 3.5MHz Probe @00 with 0.5" Focal Depth J, A A 4- 11 i A A is 4.0 0.6" 0.8" I1.0" 0.096"setI 1.2"!i.... IIIH I II II I Figure 5-45 -Sensitivity Profile for 3.5MHz Probe @00 with 0.85" Focal Depth Page 42 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid54-54-P-1 14-001 WeldsJ 54-PQ-1 14-001

6.0 DESCRIPTION

OF EXAMINATION TECHNIQUES The modeling process performed as part of the feasibility study (see Section 7) provided the basis for development of the examination techniques.

Technique refinements were made using the transducers on the development mockup to optimize the procedure.

This process was performed using the development mockup that contains a broad range of flaw types, dimensions, and locations distributed throughout the weld volume. Tests on the development mockup indicated that the 3.5 MHz transducer was best suited for flaw detection and the 5MHz transducer was best suited for flaw dimensioning.

The flaw detection and flaw sizing discussion presented here is relative to these two transducers and their intended function.

The examination techniques include two steps: flaw detection and flaw dimensioning.

The method for developing these processes is described in the following paragraphs.

Specific implementation of these steps is described in detail in the examination procedure (see Reference 10.6).6.1 Flaw Detection The proximity of the OTCP lid weld to the top of the canister and the chamfer at the OD of the canister limits the scanning surface for this weld. This is compensated for by selecting the uppermost transducer position that utilizes all of the transducer elements and selecting a range of beam angles that provides complete coverage of the weld volume. For this position, focal laws are developed to generate beam angles ranging from -30° to +50° with the positive beam steering toward the top of the canister.

This is a total range of 800. In order to provide even distribution of the energy field both forward and back of the beam center, a wedge angle of 50 is used. This places the natural refracted beam angle at --120 (longitudinal mode) which is the approximate center of the range of angles needed to provide coverage.Because the depth of the QTCP lid weld ranges from ~.34" to 1.2" from the OD of the canister more than one focal depth is required to achieve optimum sensitivity for flaw detection across this range. Using a reference block containing 1/1 6 th side drilled holes with depths at 0.2" intervals, focal laws were developed to provide high sensitivity throughout the weld thickness.

Two separate focal depths were determined to be effective; 0.5" and 0.85". Two channels are sued; one for each focal depth, both are executed simultaneously during the scan.Coverage for the ITCP weld is unobstructed but has a narrow aperture (fusion area) in the canister wall through which the examination must occur. This means that a large range of angles is not needed because coverage can be achieved with beams a few degrees either side of 0° that also has the highest energy concentration.

The optimum transducer position for this weld is approximately centered on the weld.Based on the parameters identified above it is clear that flaw detection can be accomplished using a single line scan for each weld by traveling parallel to the weld.Using the development mockup, scans were performed to validate this premise. It is recognized that the length of flaws such as tungsten inclusions could be quite short.Page 43 of 115 A AR E VA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001I This requires sampling along the scan to be small. Testing determined that a sample interval of 0.025" provides adequate data density across the length of the flaw to enable reliable detection.

Efficient execution of the detection scan involves consideration of the required parameters for both welds. Since UT parameters for the OTCP weld are the most conservative, they are used for both welds; this includes the full range of beam angles and dual channels for both focal depths. The most efficient data acquisition sequence is to scan both welds in the same scan sequence.

To accomplish this task, a scan pattern was developed that includes a single scan pass for the OTCP weld with a single index to the center of the ITCP weld to perform a single scan pass for that weld.Analysis of the detection data involves data imaging in various formats that include:* sectorial B-scan -sweeping of the full range of the beams on a cross-section view of the weld.* a side view B-scan -providing a section thickness image along the length of the scan.While other views are used, these are the primary views for flaw detection.

As the beam cursor is swept through the range of angles in the sectorial B-scan images of flaws, if present, will be observed in the side view B-scan. They will appear as localized coherent areas of high amplitude (greater than 4:1 signal to noise ratio) signals relative to the background noise levels. When identified the location of the flaws are recorded for subsequent scanning and dimensioning with the flaw sizing transducer (5MHz).Examples of responses from the weld manufacturing flaws in the development mockup are included in Section 8 of this document 6.2 Flaw Sizing When performing flaw sizing, the emphasis is on high resolution of the flaw area in order to provide the most accurate estimate of flaw size. Using the data recorded from the detection scan which includes the flaw depth, location, and end points a localized area is defined for scanning using the 5MHz transducer.

Scanning with the sizing transducer uses a raster scan with the scan direction perpendicular to the weld length and index direction parallel to the weld. Focal laws are applied to provide a range of angles from -30° to +450 with the positive beam direction toward the top of the canister.

A focal depth is programed based on the measured depth of the flaw from the detection data. The range of angles, combined with the scan line perpendicular to the flaw, allows for viewing the flaw with different angles from different positons on the canister surface. This provides the greatest flexibility for selecting the optimum flaw response for dimensioning.

Care must be taken to assure the flaw response is not saturated because the dimensions for flaw length and height are relative to the maximum response obtained from the flaw. If the flaw does not Page 44 of 115 A A R EVA Technical Justification I Phased Array Ultrasonic Examination of Dry Storage Canister Lid Welds 54-PQ-1 14-001&4-PO-1 14-nfl 54-PQ-14-00 I provide a response that has a signal to noise ratio of at least 4:1 the flaw shall be scanned and dimensioned using the 3.5MHz probe to improve the signal to noise ratio.Analysis of the sizing data involves data imaging in various formats that include:* sectorial B-scan -sweeping of the full range of the beams on a cross-section view of the weld.* a top view C-scan -to image the flaw for length and height measurements.

While other views are used, these are the primary views for flaw dimensioning.

As the beam cursor is swept through the range of angles in the sectorial B-scan and along the scan direction in the Top C-scan, the flaw response is maximized for measurement.

The horizontal and vertical echo dynamic displays are used for measurements in the Top C-scan window. The reference and measurement cursors are used to bound the flaw for display in the echo dynamic window. Length measurements are performed by setting a cursor in the horizontal echo dynamic display at the -6dB position.

The gain is adjusted to set the response to the -6dB cursor then increased 6dB. The flaw length is determined by the different in index position at the intersection points of the -6dB cursor with the flaw amplitude profile. The -6dB measurements represent the position at which the center of the beam is at the edge of the flaw. Flaw length measurements from the weld manufacturing flaws in the development mockup are included in Section 8 of this document.The measurements of flaw height are performed in the same manner except the vertical echo dynamic display is used and a -3dB threshold is used instead of the -6dB threshold.

Flaw height measurements from the weld manufacturing flaws in the development mockup are included in Section 8 of this document.Page 45 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001I Welds54-PQ-1 14-001

7.0 DESCRIPTION

OF MODELING Modeling of the DSC ITCP and OTCP lid weld configuration and ultrasonic parameters was performed as part of the initial feasibility study (Reference 10.2) for this project. The modeling was performed using the CIVATM software which is an industry recognized sound field imaging and flaw response simulation program. The modeling exercise provides a basis to perform probe design and technique development.

It is not the defining criteria for the process as this activity is performed during testing on mockups containing flaws of interest.

The development activity is discussed separately in Sections 6 and 8.Modeling to optimize the transducer design for the component configuration was performed to evaluate the array configuration, element arrangements, apertures, frequency, focusing, and beam angles. The modeling results indicated that a frequency of 3.5MHz was well suited for the OTCP weld and provided the sensitivity and resolution required for the added thickness of this weld. The optimum design for this weld includes a 2D, 10 x 6 array, with 10 elements on the primary axis and 6 elements on the secondary axis. This design is capable of steering the primary axis up to 550 and the secondary axis up to 250. The primary steering combined with the secondary axis focusing creates a highly focused beam with high sensitivity.

Images of the sound field with this design are shown in Figures 7-1 and 7-2.Figure 7-1 Sound Field Model for 3.5MHz Transducer

~.5" Focal Depth Page 46 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid Welds F 54-PQ114-001 54-PQ-1 14-001 q I I'0 o Figure 7-2 Sound Field Model for 3.5MHz Transducer

~.85" Focal Depth Page 47 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 WeldsI54-PQ-1 14-001 A similar design was selected for the ITOP lid weld except a frequency of 5MHz was selected because the beam does not have to travel through as much weld metal as with the OTCP lid weld. The model indicates beam steering up to 50 degrees is possible with this design.Because the frequency is higher for this transducer, the beam has a slightly smaller focal zone than the 3.5 MHz transducer.

Images of the sound field with this design are shown in Figure 7-3.1-2q U ~ ~ ~f~J .~ !~ U J9fr~e@~C.m.~*~.f I~dd ~ R~.jt (I?)1$1 Figure 7-3 Sound Field Model for 5MHz Transducer Modeling for flaw response included postulated near and far side fusion line lack of fusion flaws for both welds. A 1lmm side drilled hole was selected as the reference reflector in order to evaluate the relative responses from the selected flaws. The flaw simulation exercise showed that the transducer designs should be effective for the OTOP and ITOP lid welds.Results from the flaw response modeling is discussed in greater detail in the feasibility study listed in Reference 10.2 The modeling exercise provided the basis for transducer design and the fundamental approach for examination of the ITOP and OTCP lid welds. The flaw response modeling provided high confidence that the flaws of interest could be detected and dimensioned with the predicted transducers.

Further refinements were made during the technique development and are discussed in Section 6 of this document.Page 48 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001 8.0 RESULTS OF LABORATORY TESTING This section discusses the results of work performed to develop techniques for flaw detection and sizing using a representative mockup containing typical welding manufacturing flaws that have the potential to exist in field welds. The objective was to identify and optimize the techniques to the point where they could be specified in the examination procedure.

Ultimately, the procedure would be subjected to a demonstration on a "blind" mnockup to validate the process. Drawings of the mockup used for development are included in Appendix A.8.1 Flaw Detection:

Data was acquired from the DSC development mockup to quantify the accuracy of the techniques selected for flaw detection and length approximation in the ITCP and OTCP lid welds. The development mockup (sample no. 5575-1 -01) replicates the ITCP and OTCP weld configurations with the exception that the mockup is flat. (The actual canister has a diameter of 67.25".) The process used for data acquisition is described in AREVA Procedure 54-UT-I114-000 (and revision 001).Tables 8-1 and 8-2 compile the detection data results and length approximation measurements for each weld using the detection probe. The results indicate that all flaws in the mockup were successfully detected using the techniques described in the referenced procedure.

The intent of the flaw detection phase of the process is to identify weld manufacturing flaws and identify the location of the flaw for subsequent flaw sizing scans. Although length measurement values are provided for the 3.5 MHz data they are not the values intended for flaw length sizing. They just establish flaw boundaries from which the sizing scans are developed.

The flaw sizing techniques described in 8.2 are intended for flaw dimensioning.

The figures following Tables 8-1 and 8-2 include a cross-section of the flaws in the OTCP and ITCP welds at 2" intervals along the length of the block. The mockup contains one flaw in each weld at each 2" interval.

Below the cross section sketch are the flaw responses observed for reach flaw. Images include the Sector scan, A-scan, and Side B-scan with the flaws identified in each view. These images provide objective evidence of the detectability for each flaw.Page 49 of 115 A AR EVA Technical Justification Phase AraL ltaoicEaiationDofh S Dry Stoag C eanstereLd Legt4Atulenth Det 14-0012 2 4.18 0.614 4.03 4.30 0.270 0.257____

0.013 0.000 3 6.18 0.545 5.93 6.28 0.350 0.145 0.205 0.042 4 8.03 0.53 7.60 8.48 0.880 0.635 0.245 0.060 5 10.10 0.471 9.78 10.30 0.520 0.496 0.024 0.001 6 12.13 0.824 11.70 12.58 0.880 0.755 0.125 0.016 7 14.00 0.773 13.90 14.13 0.230 0.304 -0.074 0.005 8 16.05 1.105 15.80 16.30 0.500 0.300 0.200 0.040 9 18.03 1.127 17.83 18.25 0.420 0.310 0.110 0.012 10 20.05 0.885 19.88 20.25 0.370 0.302 0.068 0.005 11 22.08 0.851 21.90 22.23 0.330 0.291 0.039 0.002 v 0.019 Average: 0.101 0.019 SRMSE: 0.137 3.5 MHz Line scan Flaw Location Depth Start End Measured Length Actual Length Delta ErrorA2 12 2.10 0.534 1.45 3.00 1.55 1.247 0.303 0.092 13 4.13 0.534 3.45 4.80 1.35 0.998 0.352 0.1241 14 6.13 0.550 5.65 6.60 0.95 0.756 0.194 0.03E 15 8.10 0.737 7.80 8.25 0.45 0.238 0.212 0.045 16 10.03 5.560 9.63 10.45 0.82 0.488 0.332 0.11C 17 12.10 0.819 11.95 12.25 0.30 0.227 0.073 0.005 18 14.08 0.819 13.90 14.28 0.38 0.290 0.090 0.00E 19 16.05 0.797 15.78 16.35 0.57 0.500 0.070 0.005 20 18.05 0.622 17.98 18.10 0.12 0.153 -0.033 0.001 21 20.08 0.533 19.80 20.38 0.58 0.256 0.324 0.105 22 22.05 0.533 21.78 22.08 0.29 0.138 0.157 0.025 w 0.051 Average: 0.189 0.051 SRMSE: 0.225 Page 50 of 115 A AREVA Technical Justification P hased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001 It N tNuA JSiUF4.. .. ~ L-..Page 51 of 115 A AREVA Technical Justification IPhased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001 CLAW Z U IN 11iCLVS]UN SK:-90 I---0(']5 0.257" FLAW° ° ° i ...... :.....Ft /W 13.129.. .-L---J Page 52 of 115 A AREVA Technical Justification IPhased Array ultrasonic Examination of Dry Storage Canister Lid eds54"PQ-1 14-00154P_1-0 IF?SKEW- 90")-055). 132 FLAY 3 " o 1 4 5,---0"756'F ...... ._1 Page 53 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds54-PQ-1 14-001["LA'V 4 L [I-rOc.54 7 1 LAW I4 I Page 54 of 115 A AREVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid Welds 54PQ114-001 54-PQ-1 14-001 FLAXV 5 tJ-Y 0 ,048 o 4%6-I----rL V 0O488--[--4.030 Page 55 of 115 A AREVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid I54-PQ-1 14-001 WeldsI 54-PQ-1 14-001.5 1 Page 56 of 115 A AREVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid I54-PQ-1 14-001 WeldsI54-PQ-1 14-001I I [1Pr SKEW- 9u o .304-1-IT r ,A lK i Page 57 of 115 A AREVA Technical Justification

[Phased Array Ultrasonic Examination of Dry Storage Canister Lid °"54_PQ_1 14-001 FLAW 3 LWF pK.-90)095 05300 i : F~LAW 89 Page 58 of 115 A AREVA Technical Justificationray Ultrasonic Eamination of DryStoage CanisterU Lid, -P0-1 14-001 FLAW 9 SKFW- 9O'cx i ]--Page 59 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 WeldsI54-PQ-1 14-001 I FLAW iO SK[v- 9O" O3O2~ A~'lAY-Fo-0 5 6 m O.7Mh~~Page 60 of 115 A AR EVA Technical Justification IPhased Array ultrasonic Examination of Dry Storage Canister Lid I54-PQ-1 14-001 Welds54-PQ-1 14-001II I OF90'o.2 9 1-t-H-Page 61 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid I54-PQ-1 14-001 WeldsI54-PQ-1 14-001I 8.2 Flaw Dimensioning:

Flaw length and height sizing is performed using the 5.0 MHz transducer.

Each of the detected flaws identified in 8.1 have been dimensioned in the length (parallel to weld) and height (perpendicular to weld length) directions.

The process used for data acquisition is described in AREVA Procedure 54-UT-i114-000 (and revision 001), which was developed based on the work performed with the development mockup. The length of the flaw is measured at -6dB end points and the height is measured at -3dB levels. Flaw length and height measurements are presented in Tables 8-3 through 8-6.Tables 8-3 through 8-6 compile the results for length and height sizing measurements for each weld using the sizing probe. The results indicate that all flaws in the mockup were successfully sized using the techniques described in the referenced procedure.

The dimensions reported using the flaw sizing data are intended to be used for determining weld acceptance.

The figures following Tables 8-3 through 8-6 include a cross-section of the flaws in the OTCP and ITCP welds at 2" intervals along the length of the block. The mockup contains one flaw in each weld at each 2" interval.

Below the cross section sketch are images the flaw responses observed for reach flaw. The images are ordered sequentially by flaw number starting with the OTCP weld flaws (#1-11) and then the ITCP weld flaws (#12-22).

Images include the Sector scan, followed by three Top C-scan images with the flaws identified in each view. The page containing the three C-scan images includes an overview of a portion of the weld length that contains the flaw, an image showing the flaw length measurement at -6dB, and an image showing the flaw height measurement at -3dB where the profile intercepts the cursor position.

These images provide objective evidence of the dimensioning for each flaw.Page 62 of 115 A AR EVA Technical Justification IPhased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds54-PQ-1 14-001 5 MHz Raster Scan for Flaw Sizing Flaw Location Depth Start End Length -6dB Actual Length Delta ErrorA2 1 2.15 0.684 1.94 2.08 0.140 0.145 -0.005 0.000 2 4.18 0.614 3.94 4.14 0.204 0.257 -0.053 0.003 3 6.18 0.545 5.88 6.04 0.160 0.145 0.015 0.000 4 8.03 0.53 7.63 8.30 0.670 0.635 0.035 0.001 5 10.10 0.471 9.72 10.20 0.480 0.496 -0.016 0.000 6 12.13 0.824 11.57 12.31 0.740 0.755 -0.015 0.000 7 14.00 0.773 13.72 13.94 0.220 0.304 -0.084 0.007 8 16.05 1.105 15.77 16.05 0.280 0.300 -0.020 0.000 9 18.03 1.127 17.75 18.06 0.310 0.310 0.000 0.000 10 20.05 0.885 19.77 20.09 0.320 0.302 0.018 0.000 11 22.08 0.851 21.83 22.11 0.280 0.291 -0.010 0.000 Average: -0.0 12 001 0.001 SRMSE: 0.034 5 MHz Raster Scan for Flaw Sizing Flaw Height min Height max Height -3dB Actual Height Error ErrorA2 1 0.64 0.72 0.08 0.060 0.020 0.000 2 0.15 0.25 0.10 0.060 0.040 0.002 3 0.71 0.78 0.07 0.055 0.015 0.000 4 0.43 0.61 0.18 0.197 -0.017 0.000 5 0.30 0.36 0.06 0.071 -0.011 0.000 6 0.41 0.54 0.13 0.196 -0.066 0.004 7 0.44 0.51 0.07 0.053 0.017 0.000 8 0.10 0.21 0.11 0.095 0.015 0.000 9 0.34 0.44 0.10 0.085 0.015 0.000 10 0.39 0.49 0.10 0.095 0.005 0.000 11 0.40 0.54 0.14 0.083 0.057 0.003 I 0.001 Average: 0.008 0.001 IRMSE: 0.032 Page 63 of 115 A AR EVA Technical Justification IPhased Array Ultrasonic Examinationof Dry Storage Canister Lid wls54-PQ-11-06_P1 14-001 5 MHz Raster Scan for Flaw Sizing Flaw Location Depth Start End Length -6dB Actual Length Error ErrorA2 12 2.10 0.534 1.32 2.57 1.25 1.247 0.003 0.000 13 4.13 0.534 3.39 4.42 1.03 0.998 0.032 0.001 14 6.13 0.550 5.52 6.34 0.82 0.756 0.064 0.004 15 8.10 0.737 7.80 8.04 0.24 0.238 0.002 0.000 16 10.03 5.560 9.56 10.05 0.49 0.488 0.002 0.000 17 12.10 0.819 11.78 12.03 0.25 0.227 0.023 0.001 18 14.08 0.819 13.75 14.07 0.32 0.290 0.030 0.001 19 16.05 0.797 15.65 16.15 0.50 0.500 0.000 0.000 20 18.05 0.622 17.82 17.97 0.15 0.153 -0.003 0.000 21 20.08 0.533 19.85 20.04 0.19 0.256 -0.066 0.004 22 22.05 0.533 21.84 21.96 0.12 0.138 -0.018 0.000 Average: 0.006 0.00 1 SRMSE: 0.032 5 MHz Raster Scan for Flaw Sizing Flaw Height min Height max Height -3dB Actual Height Error ErrorA2 12 1.37 1.62 0.26 0.255 0.000 0.000 13 1.48 1.62 0.14 0.129 0.011 0.000]14 1.33 1.48 0.15 0.132 0.018 0.000 15 1.33 1.43 0.10 0.032 0.068 0.005 16 1.61 1.68 0.07 0.030 0.040 0.002 17 1.22 1.33 0.11 0.053 0.057 0.003 18 1.25 1.36 0.11 0.050 0.060 0.004 19 1.38 1.47 0.09 0.073 0.017 0.000 20 1.41 1.50 0.09 0.035 0.055 0.003 21 1.42 1.51 0.09 0.056 0.034 0.001 22 1.43 1.51 0.08 0.061 0.019 0.000 Average: 0.034 002 0.002 SRMSE: 0.041 Page 64 of 115 A A REVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 WeldsI54-PQ-1 14-001 FLt'P4 i I UNG~S t I Nt F 1.I[UN FLAW Page 65 of 115 A AR EVA Technical Justification SPhased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001 Page 66 of 115 A AREVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001I2_TUKGS 9EN [NLUI.060 FL~AW 13 129 Page 67 of 115 A AR EVA Technical Justification SPhased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001I Page 6 of 11 A AREVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid I54-PQ-1 14-001 WeldsI 54-PQ-1 14-001 fLIAW 3 IRP SKEW-30"-0.055-o. 32 Page 69 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 WeldsI54-PQ-1 14-001 Page 70 of 115 A AREVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001 Fl A'W 4 L [IF 90" FLAV# 4 FILAV 1.5 Page 71 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Eamination ofDySoaeCnse i e,0s- 1400 Page 72 of 115 A AREVA Technical Justification IPhased Array Ultrasonic Examination of Dry Storage Canister Lid Welds 54-PQ-1 14-001 AW Ai L fJF 0I 48'-0.077 FLAW 0.4&i- --I LAY 1&,.030 A-I Page 73 of 115 A A REVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid WeldsIl l54PQ114-001 54-PQ-1 14-001 Page 74 of 115 A AREVA Technical Justification SPhased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds/54-PQ-1 14-001 0.227-'-' I!LAV 17 Page 75 of 115 A AR EVA Technical Justification IPhased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001I Page 76 of 115 A AR EVA Technical Justification P hased Array Ultrasonic Examination of Dry Storage Canister Lid Welds 54PQ114-001 54-PQ-1 14-001 fLA~/ 2~K~iW- ~w O. 0 --,/Ft AV ?Page 77 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 WeldsI54-PQ-1 14-001 Page 78 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid I54-PQ-1 14-001 WeldsI54-PQ-1 14-001I FLAW LII Li AW o.50oo0:ll 2).0935 Page 79 of 115 A AR EVA Technical Justification P hased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001I U Page 80 of 115 A AR EVA Technical Justification Phased Array Ultrasonic Examination of Dry Storage Canister Lid 54-PQ-1 14-001 Welds 54-PQ-1 14-001 5.4 Personnel Qualifications: