ML17059B020
| ML17059B020 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 02/10/1995 |
| From: | GENERAL ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML17059B019 | List: |
| References | |
| UT-NMP-703V, UT-NMP-703V0, NUDOCS 9512220203 | |
| Download: ML17059B020 (30) | |
Text
4 GE Nuclear Energy PROCEDURE: UT-NMP-703VO REvlsloN No.: 0 TlTLE PROCEDURE FOR THE GERIS 2000 ULTRASONIC
. EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS ~
t PROJECT MANAGER GE NDE AND ADM T TIVE P OCEDURES:
PROJECT MANAGER:
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DATE: 0~~ - 3o /gq ~ 4a DATE: DATE: Z -~~ "5~
COMMENTS: This procedure is the site specific version developed from GE-UT-703, Version 0. The following changes from the parent version have been made to incorporate Customer comments:
Revised Para. 2.2 to reflect GE NE's current personnel certification procedure.
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No: UT-NMP-703VO Revision No.: 0 Page 1 of.14 GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS TABLE OF CONTENTS SECTION DESCRIPTION PAGE NO.
1.0 SCOPE
2.0 REFERENCES
3.0 PERSONNEL 4.0 EQUIPMENT 5.0 CALIBRATION 6.0 EXAMINATION 10 7.0 RECORDING 8.0 EVALUATION 12 9.0 REPORTING 12 FIGURE 1
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No: UT-NMP-703VO Revision No.: 0 Page 2 of 14 GE Nuclear Energy
Title:
PROCEDURE FQR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 1.0 SCOPE 1.1 This procedure defines the requirements for automated contact pulse-echo Ultrasonic Examination of Nozzle Inside Radius and bore regions using the GERIS 2000 ultrasonic examination system.
1.2 The techniques described herein are applicable to both clad and unclad inside radii and nozzle bores as depicted in Figure 1.
VESSEL NOZZLE 14I SAFE END 41 4A 3 21 2A lBI FIGURE 1 EXAMINATIONVOLUME NOTES: ASME Code Volume: Zones 1 and 2A NUREG 0619 Volume: Zones 1, 2A, 2B, 3, 4A, 4B and 5 1.3 The provisions permitted in ASME Section XI Paragraph IWA-2240 are the basis for this procedure. Articles 4 and 5 of ASME Section V are used as guidelines in the procedure development.
1.4 The objective of the automated UT examination described herein is the detection and recording of indications within nozzle inner radius and bore identified as Zone 1, 2A, 2B, 3, 4A, 4B and 5 in Figure 1. The examinations are performed from the exterior surfaces of the reactor pressure vessel or nozzle OD blend radius for Zone 1; the nozzle outer blend radius or nozzle for Zone 2A and the nozzle for Zones 2B, 3,4A, 4B; and the nozzle or safe end forging for Zone 5 ~
I' No: UT-NMP-703VO Revision No.: 0 Page 3 of 14 GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 1.5 The automated UT examination described herein has evolved from manual techniques which were the result of specialized development testing by General Electric Company (GE) and cooperating utilities using actual nozzle forgings including a full size nozzle and vessel plate mockup containing surface notches. The data obtained from these tests on the GE mockup and on BWR nozzles at operating plants have been considered in the preparation and verification of the adequacy of the techniques described herein.
2.0 REFERENCES
2.1 American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section V and XI 1983 Edition, Summer 1983 Addenda.
2.2 General Electric document 386HA480, "Certification of Nondestructive Test Personnel".
2.3 NUREG 0619 "BWR Feedwater Nozzle and Control Rod Drive Return Line Nozzle Cracking" 2.4 General Electric procedure GE-ADM-1002, "Procedure for Review Process and Analysis of Recorded Indications".
2.5 General Electric procedure GE-ADM-1005, "Procedure for Zero Reference and Data Recording for Non-destructive Examinations" 2.6 GE Test Procedure 508-1487, "Manual Nozzle Inner Radius UT Personnel Qualification".
2.7 General Electric procedure GE-UT-309, "Manual UT Planar Flaw Sizing of Nozzle Inner Radius and Bore Regions".
2.8 General Electric procedure GE-UT-311, "Procedure for Manual Ultrasonic Examination of Feedwater Nozzles Inner Radius and Bore".
2.9 General Electric Quality Assurance Manual, QAM-003, "Quality Assurance Manual for Inservice Inspection".
2.10 NEDE - 31735P Class 3, "BWROG Manual for Materials and Processes".
2.11 Alternate Method to the ASME Code Calibration Confirmation.
II No: UT-NMP-703VO Revision No.: 0 Page 4 of 14 GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 3.0 PERSONNEL 3 ~ 1 AII personnel assisting in performing the ultrasonic examination, calibration and-verification of calibration for the remote ultrasonic examination system shall be certified to at least Trainee. A Trainee or Level I individual shall not independently evaluate or accept the results of the nondestructive examination. A Trainee or Level I may only be allowed to participate in calibrations and examinations through equipment setup and data recording and only under the direct supervision of the responsible Level II. At least one person certified to a minimum of Level II shall be present during all calibrations and examinations. General Electric examination personnel shall be certified in accordance with paragraph 2.2 ~
3.2 To be classified as lead GERIS 2000 operators, personnel shall have completed a minimum of ten weeks of specialized training in addition to the training required by Paragraph 3.1 above. This training shall consist of a combination of laboratory and job site operation of the GERIS 2000 under the direction of a certified GERIS 2000 operator. Satisfactory completion of lead GERIS 2000 operator training shall be documented by evidence of a practical demonstration of proficiency and the required "on-the-job" training.
3.3 Any GERIS 2000 operator who has not operated the system for a period exceeding eighteen months is required to perform a proficiency demonstration prior to reassignment to GERIS 2000 work. A statement attesting to satisfactory completion of the demonstration shall be issued by GE Nuclear Energy, and shall become part of the employee's certification records.
3.4 All personnel placing tracks, positioning the automatic scanner, verifying transducer position, etc. need not be certified, but shall be trained in the performance of these duties to the satisfaction of the responsible Level III. This training shall be documented. Documentation shall include a demonstration of proficiency with the system being used.
3.5 When manual examination for verification is performed, the personnel shall be certified to at least Level II and shall be trained on a nozzle mockup with the techniques described in GE Examination Procedure GE-UT-311.
4.0 EQUIPMENT 4.1 Ultrasonic Equipment 4.1.1 The GERIS 2000 Data Acquisition System shall be used. The system shall be operated in the pulse-echo mode. The GERIS 2000 System is a computer controlled 16 channel multiplexed ultrasonic instrument. Each channel can be individually controlled through software e.g. . instructions for gate length and
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position, sound velocity, sample rate and exam area pulsing limits. Real time C-scan and A-scan displays are provided for system monitoring by the operator. These displays need not be monitored for the effective performance of the examination. The complete RF output for each channel used during an examination is recorded on optical disks for off-line analysis.
4p No: UT-NMP-703VO Revision No.: 0 Page 5 of 14 GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 4.2 Data Processing Unit=
4.2.1 The GERIS 2000 Data Analysis System, which consists of a HP-400/700 series computer, monitor, optical disk storage modules, and keyboard, performs automated extraction of peak reflectors. The analysis system provides the Data Analyst with access to the entire recorded A-scan waveform, B-scan and C-scan displays for further detailed analysis. This information is available in either linear or logarithmic displays. Preliminary evaluation of the recorded data is accomplished by analysis algorithms in the computer software. Final evaluation of the examination results is the responsibility of the Level III.
4.3 Search Units 4.3 ~ 1 Ceramic type search units having a nominal frequency of 1.0 to 2.25 MHz shall be used. Search units shall range from 0.375" to 1.5" in dimension.
Search units may be circular, elliptical, square, or rectangular. 1.0 MHz search units shall be used on clad ID surfaces and 2.0 to 2.25 MHz search units shall be used on unclad ID surfaces.
I 4.4 Ultrasonic Search Unit Wedges 4.4.1 The Zone 1 search unit package typically contains two (2) transducers for producing shear waves. The package assembly provides the ability to angulate the Zone 1 search units so that the sound beam intersects the Zone 1 inner radius section at the designed angle.
4.4.2 Zone 2A/2B examination from the nozzle OD blend radius is basically a continuation of the Zone 1 examination. The scanning is performed from the nozzle OD blend radius using shear waves. The Zone 1 examination area may also be examined from the OD blend radius where the wedges are contoured to conform to the nozzle OD blend radius surface.
4.4.3 The Zone 2B and 3 examinations scanned from the nozzle OD cylindrical surface are performed with transducer packages that are attached to the Safe-end scanner and provide the ability to angulate the sound within the material The Zone 2B and 3 wedges produce shear waves.
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4.4.4 The Zone 4A examinations scanned from the nozzle taper OD surface are performed with transducer packages that are attached to the Safe-end scanner and provide the ability to angulate the sound within the material.
The Zone 4A wedges produce shear waves.
4.4.5 The Zone 4B and 5 examinations scanned from the nozzle to safe end OD blend radius and the nozzle to safe end OD cylindrical surface are performed with transducer packages that are attached to the Safe-end scanner and provide the ability to angulate the sound within the material. The Zone 4B and 5 wedges produce shear waves; when the safe-end is bimetallic then refracted longitudinal waves should be used.
No: UT-NMP-703VO Revision No.: 0 Page 6 of 14 GE Nuclear Energy
Title:
PROCEDURE fOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 4.4.6 The extent of scanning with each of the above examination techniques is dependent upon the nozzle geometry.
4.5 Search Unit Cables 4.5.1 Search unit cables of a type compatible with the GERIS 2000 System shall be used. The length of the pre-amp umbilical cord (power/signal) from the UT console to the UT pre-amp box is a maximum of 1000 feet. The length of the signal cable from the UT preamp box to the transducer is a maximum of 150 ft.
4.6 Scanning Mechanisms 4.6.1 The magnetically attached nozzle scanner is a combination of three separate mechanisms:
4.6.1.1 A removable channel track surrounding the nozzle body or safe end.
4.6. 1.2 A magnetically attached motor-driven unit for transporting the scanner assembly.
4.6.1.3 A scanner assembly with ultrasonic transducers.
4.6.2 The scanner is held in the circular steel track by magnetic wheels which are guided in a machined channel. Motor power is furnished by DC drive motors attached to permanent magnetic wheels.
4.6.3 Small tabs extending from the track ID are butted up against the beveled surface of the nozzle body for the nozzle scanner. For the safe end scanner, the track is mounted on the nozzle safe-end. The positioning information for the scanner comes from a pendulum encoder. Azimuth orientation around the nozzle is given in degrees with 0'ocated at the 3 o'lock position, increasing in the clockwise direction, as viewed facing the vessel. The transducer assembly is moved by a ball screw coupled to a motor and a position encoder.
The transducer assembly provides passages for couplant and is held in contact by spring pressure 4.7 Calibration Blocks 4.7.1 Basic ASME Code Vessel calibration block is for Zones 1, 2A, 2B, 3, 4A. The safe-end calibration block is used for Zones 4B and 5. The appropriate thickness calibration block of the plant nozzles to be examined shall be supplied or approved by the Owner.
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No: UT-NMP-703VO Revision No.: 0 Page 7 of 14 GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RA'DIUS AND BORE REGIONS 4.7.2 The GE nozzle inner radius transfer block may be used in lieu of the ASME Code vessel calibration block. This block is a 6" thick section of ASTM 516 GR 70 low alloy carbon steel ~ This block has an EDM notch that is 0.125" deep by 0.010" wide and 1.0" long on the inner surface. This block was used in the qualification testing of the clad removed feedwater nozzle mockup.
This block may be used alone to set the UT sensitivity or the sensitivity of this notch may be referenced to the Owners applicable calibration block.
4.8 Couplant 4.8.1 Reactor Grade (demineralized/deionized) water shall be used as couplant for both calibration and examinations. The ultrasonic couplant to be used shall be in sufficient quantites to maintain adequate acoustic contact between the search unit and component, and shall be certified in accordance with paragraph 2.10. The demineralized or deionized water shall be supplied by the Owner.
- 5. 0 CALIBRATION 5.1 General Requirements for Calibration 5.1.1 Calibration for the examination shall include the complete UT system. Any change in search units, couplants, UT instruments, or any other components of the system shall be cause for a calibration check for the particular channel or channels involved. Exceptions to this requirement are: 1) a change in transducer wedges as permitted in paragraph 5.5.2, and 2) a change of cables as permitted in paragraph 5.5.1.1. Calibration for the examination shall be obtained on the basic calibration block applicable to the thickness of the material being examined. The temperature of the basic calibration block shall be within a 25'F of the component surface temperature. The calibration block used shall be heated or cooled as necessary to meet the 25' requirement. The identification of the temperature measuring device shall be entered on both the Calibration and Examination Data Sheets 5.1.2 Calibrations and the establishment of the DAC shall not be accomplished with the center line of the transducer housing closer than 1-1/2 inch (.075" for the safe-end) to any edge of the calibration block.
5.2 Instrument Calibration 5.2.1 Instrument linearity verifications shall be performed as part of each initial and final calibration, or every three months, whichever is less.
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No: UT-NMP-703VO Revision No.: 0 Page 8 of 14
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC GE Nuclear Energy EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 5.2.2 Obtain two signals from the reference block. Manipulate the search unit to set one signal to 80% a5% FSH, and the other signal to 40% 25% FSH.
Without moving the search unit, adjust the gain to set the highest signal to approximately 100% FSH. Read the amplitude of the smaller signal. These amplitudes and the amplitudes at each succeeding step will be stored with the linearity file for each calibration. Reduce the gain in 2 dB steps until the larger signal is equal to or less than 20% FSH. Read the amplitudes of both signals, and verify the amplitude of the smaller signal is 50% of the larger signal k5% FSH.
5 '.3 Amplitude Control Linearity Check.'btain a signal from any convenient reflector. Set this signal as near as possible to 80% FSH. Using only the screen gain control, the dB changes indicated below shall be made and the resultant amplitude compared with the allowable amplitude limits. Make the required changes with the initial signal set at 40% FSH and at 20% FSH. The system shall not be used if any signal exceeds the allowable limits.
Si nal Am litude Gain Control Limit Signal Amplitude Gain Limits
(% FSH) Change (% FSH) 80 -6dB 32-48 80 -12dB 16-24 40 + 6dB 64-96 20 + 12dB 64-96 5 3
~ Beam Rotation Angles 5.3.1 Specific refracted beam and rotation angles for each nozzle are determined by the nozzle design. The beam rotation angles are calculated for each nozzle and will be supplied for the examination by the responsible Level ill.
5.4 Material Velocity 5.4.1 The velocity for each mode of propagation must be entered. The nominal shear wave velocity is 0.128 in/psec and the nominal longitudinal wave velocity is 0.230 in/psec for SA-508, SA-533, or equivalent P3 material.
5.5 System Calibration 5.5.1 The ultrasonic system calibration shall be performed on the calibration block applicable to the nozzle to be examined. The system consists of the UT unit, the transducer cable, the transducer, and the couplant. Any change in the system, except as permitted by this: procedure, requires a calibration verification check. The temperature of the examination surface and calibration block surface shall be within ~ 25'.
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No: UT-NMP-703VO Revision No.: 0 Page 9 of 14 GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 5.5.1.1 For the purpose of calibrations, recalibrations, and calibration checks, separate cables between the UT transducer and UT preamplifier may be used provided the cabling has been shown to give similar UT responses (in both time and amplitude) to the cabling used to perform the examination. If a difference is found in either time or amplitude between the two sets of cables, resultant values between the two cables shall be recorded and documented. The examination cable shall be greater in signal response than the calibration cable.
5.5.2 Calibration Verification 5.5.2. 1 Calibration shall be verified at the start and finish of each series of examinations at intervals not to exceed twelve hours. Calibration may be verified on the calibration block, or by means of a simulator such as the IIW-2 block. Any type of block may be used as a simulator provided that it contains sufficient reflectors so that at least two points on the sweep can be observed without changing the sweep range and delay controls from the calibration settings. If a simulator is used, the response must be recorded at the time of initial calibration, for reference at the,.time of verification.
5.5.2.2 If the amplitude of any reflector in the calibration verification has decreased by more than 2 dB and less than 6 dB, the dB change shall be noted and all data since the last acceptable verification shall be corrected. If the amplitude of any reflector has decreased by more than 6 dB all data since the last acceptable verification shall be voided. The equipment shall be recalibrated and the voided areas re-examined. This is an alternative method as referenced in paragraph 2.11.
5.5.2.3 If the amplitude of any reflector in the calibration verification has increased by more than 2 dB, the dB change shall be noted and all data since the last acceptable verification shall be corrected for the increase.
5.5.2.4 If the Time-of-Flight (metal path) of any reflector in the verification has changed by more than 10% of the initial reading, all data since the last acceptable verification shall be marked void. The equipment shall be recalibrated and the voided areas re-examined.
5.5 ' Angle Beam Channel Time Delay Calibration. The angle beam time delay calibration shall be made using one of the following methods: (a) DSC type block; (b) IIW-2 block; and (c) the 1/4T and 1/2T holes in the applicable vessel calibration block. Place the angle beam search unit on the block, obtain a peaked signal from the first reflector, and note the transit time. Set the time delay start position so the zero time position is at the scan surface. The adjustment is correct when the time to the first reflector is equal to one-half the time to the second reflector, a 1 psec. This must be performed once each calibration for each angle beam channel.
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No: UT-NMP-703VO Revision No.: 0 Page 10 of 14 GE Nuclear Energy
Title:
PROCEDURE FQR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 5.5.4 Gate Settings 5.5.4.1 The A-gate should be set to start at 0 @sec. The A gate end shall be set at a minimum of 1.3T.
5.5.4.2 The B-gate should be set to start at the wedge delay and stop at the end of the A- gate.
5.5.4.3 The C-gate start should be set to exclude the surface noise. The C-gate end shall be set at a minimum of 1.3T.
5 ~ 5.4.4 The Analysis gate should be set the same as the C-gate in paragraph 5.5.4.3 5.5.5 Calibration for the examination shall be established on the Owners code calibration block (with the exception of paragraph 4.7.2) of the same approximate thickness as the nozzle to be examined. The 2% of T, ID surface notch shall be detected and recorded as a solitary reflector in the DAC curve.
I 5.5 5~ ~ 1 The sensitivity for Zone 1, from,the vessel plate, is the gain established in paragraph 5.5.5 and is the reference scanning gain.
5 '.5.2 The sensitivity for Zone 1, Zone 2A/2B (from the nozzle outer blend radius) is the same gain as established in paragraph 5.5.5 with a and is the reference scanning gain. After the sensitivity has 70'ransducer been established, the wedge that is designed for this exam shall be mounted on the calibrated transducer.
5.5.5.3 The sensitivity for Zone 2B (from the nozzle barrel) is the gain established in paragraph 5.5 5 with the wedge used for the examination
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and is the reference scanning gain.
5.5.5.4 The sensitivity for Zone 3 (from the nozzle barrel) and 4A (from the nozzle taper) is the gain established in paragraph 5 5 5 and is the
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reference scanning gain.
5.5.5.5 The sensitivity for Zone 4B and 5 is the gain established on the Owners safe end calibration block with a standard 45'shear wave wedge. The circumferential ID notch shall be detected and recorded as a solitary reflector in the DAC line.
5 ~ 5.5.6 The final evaluation sensitivity shall be 14dB above clad or surface noise 6.0 EXAMINATION 6.1 Prior to examination, the welds shall be marked and identified in accordance with the weld identification and marking plan.
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No: UT-NMP-703VO Revision No.: 0 Page 11 of 14 GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 6.2 All weld identification and other marking shall be the responsibility of the Owner.
6.3 The contact surface from which the examination is conducted must be clean and free of any weld spatter or other conditions which would interfere with free movement of the transducer or impair coupling to the material being examined.
Unacceptable surface conditions shall be reported to the Owner, as surface conditions and cleaning operations are not within the scope of this procedure 6.4 Automated Scanning 6.4.1 Mount the applicable scanner assemblies on the appropriate scanner vehicle.
Install the vehicle and scanner assembly on the appropriate track.
6.4.2 Mount the applicable search unit package in the appropriate scanner ass'embly and connect the cables from the preamplifier multiplex module to their respective transducers.
6.4.3 Connect the couplant lines.
6.4.4 Move the nozzle scanner to the start'position. Select the end point at which the scanner shall stop.
6.4.5 Reference software operational manual for proper scanner/recorder inputs.
Make necessary inputs.
6.4.6 Start couplant flow and observe the channels selected to verify that they are operational.
6.4.7 Select a scanner speed that corresponds to the examination method. These values shall not exceed six inches per second or that used for calibration which ever is less.
6.4.7.1 For Zone 1 (from the vessel surface), use a maximum scanner step size of .150" with an index spacing between scans that does not exceed 75% of the transducer element dimension.
6.4.7.2 For Zone 1, 2 and 3 (from the outer blend radius and/or nozzle barrel) use a scanner step size of .075" with an index spacing between scans that does not exceed 50% of the transducer element dimension.
6.4.7.3 For Zone 4 and 5 (from the nozzle taper and the cylindrical OD surface of the safe end) use a scanner step size of .075" with an index spacing between scans that does not exceed 50% of the transducer element dimension 6.4.8 Perform the required examinations in both the clockwise and counterclockwise directions.
6.4.9 Areas that have restricted scanning shall be documented on the Examination Data Sheet .
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No: UT-NMP-703VO Revision No.: 0 Page 12 of 14 GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 7.0 RECORDING 7.1 The entire RF waveform, which is contained within the A-gate, shall be recorded.
Establish sufficient A-gate parameters to contain the area of interest for the specified Zone examination.
7.2 For Zone 1 and 2A examination, the area of interest shall be the nozzle inside corner radius and 1/2" of base material as shown in Figure 1.
7.3 For Zones 2B, 3, 4A and 4B examinations, the areas of interest shall be the 1/2" of material at the nozzle bore as shown in Figure 1.
7.4 For Zone 5 examination, the area of interest shall be the 1/2" of material at the nozzle safe end as shown in Figure 1 ~
8.0 EVALUATION 8.1 Any indications, with the exception of cladding, exceeding 20% DAC shall be evaluated.
8.2 Criteria for Defining a Crack 8.2.1 A signal meeting the recording criteria detected from both the CW and CCW direction which can also be shown in the same location on a geometrical plot of the nozzle shall be called a crack.
8.2.2 Any indication detected from one direction with an amplitude greater than the 50% recording level requires further evaluation. This will consist of a re-analysis of the nozzle data collected from the opposite direction at a lower threshold. Any signal detected with a signal-to-noise ratio of 2 or greater, regardless of amplitude, will be recorded and geometric plots will be prepared to determine if the indication is located in the same area as the original indication. If found to be located in the same area, the indication shall be called a crack.
8.2.3 Further evaluation and sizing shall be required of all indications meeting the requirements of 8.2.1 and 8.2.2.
8.3 Indications from apparent cracking shall be reported to the Owner regardless of signal amplitude.
8.4 Relevant indications shall have a signal-to-noise ratio greater than 2 to 1.
8.5 All flaw indications evaluated to IWB-3512 shall be reported to the Owner within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of final sizing determination, or as required by Contract.
8.6 Preliminary evaluation of indications will be performed by GE.
8.7 Disposition of indications is the responsibility of the Owner.
No: UT-NMP-703VO Revision No.: 0 Page 13 of 14 GE Nuclear Energy
Title:
PROCEOURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 8.8 GERIS 2000 flaw depth sizing methods shall follow the principles of reference 2.7.
9.0 REPORTING 9.1 Examination reports and records are generated by the computer system after post processing and editing of the data. These examination records and reports will be turned over to the Owner after all necessary editing and post processing. Turnover shall be made in accordance with Contract requirements. A preliminary copy of all examination records shall be submitted to the customer prior to the original data leaving site.
9.2 Calibration Data Sheet: The system calibration information shall be recorded on the Calibration Data Sheet and shall include, as a minimum, the following information:
a) Calibration sheet identification, date and time of calibration b) Name(s) and ASNT Level(s) of examination personnel c) Examination procedure number and revision d) Basic calibration block identification e) Ultrasonic instrument identification and se/'ial number f) Beam angle in the material g) Couplant h) Search unit identification: serial number, frequency and size i) Reviewer's signature, ASNT Level and date j) Search unit cable type and length k) Times of initial calibration and subsequent and final calibration checks I) Calibration reflector(s) and the instrument setting amplitudes, and sweep positions used to establish primary reference sensitivity Thermometer serial number and calibration block temperature 9.3 Examination Data Sheet: All examinations shall be recorded on the Examination Data Sheet and shall include as a'minimum the following information:
'a) Data sheet identification, date and time of examinations b) Name(s) and ASNT Level(s) of examination personnel c) Examination procedure and revision d) Applicable calibration sheet identification e) Weld identification f) Scan identification, and scan limitations, if any g) Examination surface temperature and thermometer serial number h) Couplant and lot/batch number if applicable i) Special equipment used, if any
0 No: UT-NMP-703VO Revision No.: 0 Page 14 of 14 l GE Nuclear Energy
Title:
PROCEDURE FOR THE GERIS 2000 ULTRASONIC EXAMINATIONOF RPV NOZZLE INNER RADIUS AND BORE REGIONS 9.4 Additional Supporting Data:
9.4.1 The search unit RF waveform and frequency amplitude information records.
9.4.2 The portion of the examination volume that has not been effectively examined shall be estimated. This estimate may be documented on the Examination Data Sheet or as an attachment and shall consider:
a) Volumes shadowed by part geometry b) Volumes inaccessible to the transducer 9.4.3 Indication resolution sheets and plots showing the location of recorded indications.
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