ML20073T020
| ML20073T020 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 03/16/1983 |
| From: | Adamonis D, Le Febvre B, Vano J WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| To: | |
| Shared Package | |
| ML20073T010 | List: |
| References | |
| ISI-154, NUDOCS 8305100273 | |
| Download: ML20073T020 (75) | |
Text
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V Westinghouse Water Reactor + earsmi:eoive:n Electric Corporatlan Divislans se, me Pesturg9 Pennsylv2N3 l'230 EXAMINATION PROCEDURE: 151-154 DATED: OCTOBER 5, 1982 PLANT SITE: GENERAL UTILITY: GENERAL PROCEDURE TITLE:
PRESERVICE AND INSERVICE INSPECTION OF REACT,0R VESSELS REVISION O DATED: OCTOBER 5,1982 REVISION 1 DATED: MARCH 1.6, 1983 PREPARED BY: .,
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2 D. C. Adamonis, Level III
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REVIEWED BY: ,,
B. E lefebv d , Level III Inspection Service APPROVED BY:
J. A. Vano,' Manager g/ Inspection Service -
l i 8305100273 830506 PDR ADOCK 05000334 G PDR
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N167M/46M330330 -
" '"I'SI'-154 Rev. 'l
(_) INDEX 1.0 PURPOSE -
2.0 SCOPE 3.0 EQUIPMENT 4.0 PERSONNEL REQUIREMENTS 5.0 INSTRUMENT PERFORMANCE CHECKS 6.0 SYSTEM CALIBRATION 7.0 EXAMINATION REQUIREMENTS
(~'; 8.0 INTERPRETATION AND INVESTIGATION
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9.0 RECORDING REQUIREMENTS 10.0 EXAMINATION RECOROS
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" "I'S"I'-15'4 Rev. 1
' PRESERVICE AND INSERVICE INSPECTION OF REACTOR VESSELS 1.0 PURPOSE 1.1 This document describes the equipment, calibration sequence, examination techniques, and recording requirements for preservice and inservice inspection of a reactor vessel with the remotely operated inspection tool. All operations described herein are intended to satisfy volumetric examination requirements of Section XI of the ASME Boiler and Pressure Vessel Code. Procedure RV-ISI-01, " Reactor Vessel Examination Program Preparation and Documentation," is considered part of this procedure and should be used as applicable.
2.0 SCOPE (N 2.1 This document provides general requirements for straight and angle beam immersion ultrasonic examinations of pressure retaining carbon and low alloy steel welds, nozzle safe end welds, heat affected zones, spccified base material, and weld repairs to base material which exceed 10% of the nominal wall thickness in the reactor vessel beltline regions.
2.2 Specific calibration and examination requirements, i.e., areas selected for examination, extent of examination, search unit sizes, angles, calibration standards, and water path distances, are' defined in the plant specific Examination Program Plan.
3.0 EQUIPMENT 3.1 Examinations shall be performed using pulse-echo and/or transmit-receive techniques with immersion water path coupling using the equipment listed below.
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I'SI*154Rev.1 3.1.1 . Sonic Multichannel Time - Amplitude Ultrasonic System, consisting of the following modules and interconnects:
Pulser / Preamps Mark VI Mainframe /CRT Mark VI Receiver Mark VI Interface System Controller Hardcopy Controller Gate Monitor Two Tektronix 613 Stora'ge Scopes Data Display Tektronix 4613 Hardccpy Printer <
Power Suppliers Serial Data Link
. RG-174 Cable, 23 ft.
Four Tektronix 2213 Auxiliary Displays 1
3.1.2 - Westinghouse Computer System Model 2500 3.1.3 Westinghouse MK-1 Electronic Block Simulator (EBS) 3.1.4 Harisonic Transducers .
% :' 2.25 MHz, 1.50 inches diameter 2.25 MHz, 0.75 inches diameter 1.0 MHz, 1.50 inches diameter 1.0 MHz, 0.75 inches diameter ,
- 5.0 MHz, 0.50 inches x 1.00 inches rectangular l 3.1.5 Transducer . array plates and transducer mounting assemblies 1
3.1.6 Calibration tank and manipulator l .
3.1.7 Calibration block l
3.1.8 Mechanical Transfer Standard (MTS) 3.1.9 Spherical "Hcme" Target O
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N167M/46M330330 . * * "I'SI'-15'4 Rev. 1 n
V 3.2 dther transducers, calibration standards, and/or equipment may be used for special applications or where metallurgical. characteristics or geometry preclude effective use of the equipment described above. These parameters shall be defined in the Examination Program i Plan. ,
4.0 PERSONNEL REQUIREMENTS 4.1 Ultrasonic test operators performing activities per this procedure shall be qualified and certified Level II or Level III per W PA 10.1 or equivalent procedure based on SNT-TC-1A, as supplemented by the requirements of Section XI. Individuals qualified and certified Level I or Level I Trainees per W PA 10.1 or equivalent procedure as described above may perform these activities under direct
- supervision of a Level II or Level III. All recordable indications shall be evaluated by a Level II or Level III individual.
w 5.0 INSTRUMENT PERFORMANCE CHECKS 5.1 Instrument screen height linearity and amplitude control linearity shall be verified prior to the performance of any system calibra- ,
tions and at the beginning and end of the examination period or every three months, whichever is less. The same EBS signal l response (s) shall be used for the initial determination and subsequent field checks.
5.2 The ultrasonic instrument shal'1 be verified as having a linear vertical presentation within + 5% of the full screen height for at least 80% of the calibrated screen height in accordance with the following steps.
l l
5.2.1 Utilizing the EBS and any given channel of the Sonic
' System obtain two EBS pulses on the CRT. .
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N16 /46M830330 '"'SY"154 I Rey, 1 5.2.2 Adjust the EBS controls and the receiver gain control to set the first indication to 80?; full screen height (FSH) and the second indication at 40!; FSH.
5'.2.3 Without changing the EBS controls, adjust the receiver gain to sequentially set the larger indication from 100%
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to 10?; FSH in 10?? increments. Record the smaller indication amplitude at each setting. Estimate the readings to the nearest I?s FSH.
5.2.4 The reading must be 50?; of the larger amplitude, within 15?; FSH.
5.2.5 Record all data and instrument settings on the appropriate data sheet.
5.3 The accuracy of the amplitude contrpl of the ultrasonic system shall C be verified as being within 1 20?s of the nominal amplitude ratio over its useful range in accordance with the following steps.
- 5.3.1 Utilizing the EBS and any given channel of the Sonic System obtain an EBS pulse on the CRT.
5.3.2 Adjust the receiver gain to set the indication to 80?s l FSH. Record the receiver gain setting.
5.3.3 Decrease the receiver gain by 6dB a,d record the signal amplitude.
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5.3.4 Decrease the receiver gain again by 6dB and record the signal amplitude. Decrease the receiver gai.n by an ,
additional 6dB and record the signal amplitude.
5.3.5 Adjust the receiver gain to set the indication to 40?s FSH. Record the receiver gain setting.
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AN167M/46M830330 " "ISI'-154 Rev. 1 5.3.6 Increase th'e receiver gain by 6dB and record the signal amplitude.
5.3.7 Adjust the receiver gain to set the indication to 20%
FSH. Record the receiver gain setting.
5.3.8 Increase the receiver gain by 12dB and record the signal amplitude.
5.3.9 Adjust the receiver gain to set the indication to 10%
FSH. Record the receiver gain setting.
5.3.10 Increase the receiver gain by 18dB and record the signal amplitude.
5.3.11 Recorded readings must be within the following limits:
h*,h Indication Limits Indication Set at dB Control
% of FSH . Change % FSH 80% ,
-6dB 32 to 48%
80% -12dB 16 to 24%
80% -18dB 8 to 12%
40% +6dB 64 to 96%
20% +12dB 64 to 96%
l 10% +18dB 64 to 96%
5.3.12 Record all data and instrument settings on the appropriate data sheet. -
5.4 Verification of performance of instrument performance checks shall
, be documented. Documentation shall include the date, time, and the l
initials of the operator.
5.5 When specifically requested, a photographic record of the RF pulse waveform shall be abtained for each transducer, before and after each vessel examination.
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N167M/46M830331 -
"E'*154Rev.'l 6.0 SYSTEM CALIBRATION 6.1 Calibration Requirements - General '
System calibration shall be performed at the Westinghouse Waltz Mill Site.
P 6.1.1 Calibration shall include the compi te ultrasonic system using responses from reflectors in the basic calibration block (s). The ultrasonic system is defined as the ultrasonic instrument, cables, transducer, couplant, and any other apparatus, instrument or circuit between the instrument and the calibration block surface.
6.1.2 Basic calibration blocks used for calibration of the ultrasonic system shall be defined by the plarit, specific -
Examination Program Plan and shall meet the following p)'A sG requirements.
6.1.2.1 The material from which the block (s) are fabricated shall be from one of the following: .
(a) a nozzle dropout from the reactor vessel (b) a prolongation from the reactor vessel (c) material of the same general material spec-ification, product form, and heat treatment as one of the materials being joined.
6.1.2.2 Where the component material is clad, the block (s) shall be clad to the component clad nominal thickness. Deposition of the cladding, may be by an automatic or manual technique so long as the method represents, to the extent practical, the method used on the reactor vessel.
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N16 M/46M830331 ""'%Y"154Rev.1 6.1.2.3 The calibration block shall receive at least the minimum tempering temperature treatment required by the material specification and a post weld heat treatment of at least two hours.
6.1.3 The block (s) shall be placed in the calibration tank and carefully leveled and aligned. The zero degree index of the manipulator shall be defined.
6.1.4 Each calibration shall be performed from the calibration block surface, clad or unclad, corresponding to the surface of the component from which the examinz. tion will be performed. The calibration block, surface, referance reflectors, and scan directions used during calibration shall be defined on the calibration data sheets, If, for any reason, it is necessary to change any of the calibra-tion parameters from those recommended in the Examination Program Plan, the changes shall be documented and reasons for those changes shall be transmitted to the NSID Inspection Services coordinator.
6.1.5 During calibration the search unit centerline shall be at least 1-1/2 inches from the nearest side of the basic calibration block.
6.1.6 The water temperature for calibra sc shall be with'in 25 F of the water temperature dur % s ng. \
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6.1.7 Transducers shall be Tlibrated in fixtures which provide the angle of incidence specified in the examination Program Plan. Upon completion of the calibration sequence the~ transducer / fixture assembly shall be mounted on t he
' array plate at the specified location. The orientation of the transducer with respect to the fixture shall not be E?TE D
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- %f'-154Rev.1 7 4167M/46M830331 l changed. Bubbles shall not be present on the transducer face or the calibration block entry surface during the calibration sequence. -
6.1.8 A calibration data sheet packet shall be completed for each transducer / inspection channel' combination used to examine each volume required by the plant spec.ific Examination Program Plan. All data will be fully recorded such that the operating parameters can be verified in the field. Calibration and examination data' sheets are attached as Figures 1 through 5.
6.1.9 Measurements of beam spread shall be made for each transducer used during the inspection program. These measurements shall be performed per paragraph 6.11. These data will be included in the calibration data described in paragraph 6.1.8. ,
6:2 Calibration for Straight Beam Examination of Vertical and Circumferential Welds System calibration for each straight beam inspection channel /
transducer combination used for examination of vertical and circum-ferential welds, including safe end welds and the flange-to-upper shell weld from the sh' ell side, shall be performed as described below.
l l 6.2.1 Attach the transducer to the appropriate fixture for the l required incident angle and mount the assembly on the manipulator in the calibration tank.
6.2.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and
- adjust for the required waterpath.
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N167M/46M830330 " "I'SY"154 Rev. 1
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6.2.3 Adjust the instrument delay such that the lower left corner of the initial pulse starts at the.0'gradicule on the CRT.
6.2.3.1 Adjust the. instrument r'ange to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen. Record the transit time to the entry surface reflection.
6.2.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.
w 6.2.3.3 Determine the sound velocity and measure the water temperature. Record these values.
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y _ Round Trip Distance Travel Time 6.2.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at th'e 0 gradicule on the CRT.
6.2.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and block back surface reflection occupies 60?; to 90fo of the full sweep length.
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- N167M/46M830330 ISI'-154 Rev. 1 6.2.4.2 Record the transit time between the entry surface reflection and the back surface reflection.
6.2.4.3 Calculate the sound velocity in the calibration block and record this va'lue.
6.2.4.4 Adjust the selected gate controls to include all metal travel between the entry surface reflection and the back surface reflection.
6.2.5 Set the trace and gate baselines to zero percent of scale.
6.2.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 40% + ldB of full screen NO height. Mark the peak of the indication on the screen.
Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.
4 6.2.7 Without changing instrument settings move the transducer to obtain the maximum responses from the remaining calibration holes. Mark the peak of the indications on j the screen. Record the indication amplitudes and transit times from the water / steel interface to the indications.
6.2.8 Draw a line through the maximum response points on the CRT screen. The curve may be extrapolated at either end for a distance of one quarter the thickness of the calibration I block. This line represents the basic calibration distance , amplitude curve (DAC).
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N167M/46M830330 * '"I'SY*154 Rev. 1
'.2.9 6 Adjust the'EBS pulse train to follow the DAC. Record the EBS control settings.
6.2.10 The electronic DAC module function shall then be initiated.
6.2.10.1 Adjusttheelectro[iicDACcontrolssoallEBS pulses are nominally 40% FSH.
6.2.10.2 Adjust the gate threshold (alarm level) to 16%
FSH and set for positive trigger.
6.2.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector. The amplitude of each should be at 40% FSH i IdB. If not, review steps 6.2.1 through 6.2.10.3.
<> 6.2.10.4 Decrease the receiver gain by 6dB. Switch the system to the cycle mode and scan the transducer
. assembly over the calibration block at or greater than the specified examination speed.
The gate alarm shall actuate when the peak i
response from each hole is detected. If the alarm is not observed for one or more of the l holes, investigate to identify the test system parameter (s) (e.g. , alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.2.10.5 Increase the receiver gain by 6dB and record all
- pertinent calibration data on the calibration data sheets.
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N1 7M/46MS30330 " ' N *154 Rev. 1 7
i' .- 6.2.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length. Record the reflector '
identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide ' transit times representative of those for the primary reflectors in the basic calibration block where practical.
6.3 Calibration ~for Angle Beam Examination of Vertical and Circumferential Vessel Welds System calibration for each angle beam inspection channel / transducer combination used for examination'of vertical and circumferential vessel welds, including the flange-to-upper shell weld from the
. shell side, shall be performed as described below.
6.3.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank. .
6.3.2 Position the transducer to direct the sound beam toward the~ appropriate surface of the calibration block and adjust for the required waterpath.
6.3.3 Position the transducer to obtain a maximum response from the square notch on the opposite surface or the block corner and adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT. , ,
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titl67M/46M830330 ISI-154 Rev.'l 6.3.3.1 Adjust the instrument range to the maximum achievable sweep range where the' initial pulse and entry surface reflection are displayed on the CRT screen. Record the transit time to the entry surface reflection.
6.3.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.
6.3.3.3 Determine the sound velocity and measure the water temperature. Record these values.
y _ Round Trip Distance Travel Time 6.3.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.
i 6.3.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the notch response or the block corner response occupies 50?s to 80?; of the full sweep length.
6.3.4.2 Record the transit time between the entry j surface reflection and the notch response or block corner response.
6.3.4.3 Calculate the sound velocity in the calibration block and record this value.
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- *'"I'S"I'-154 Rev. 1 N167M/46M830330 6.3.4.4 Position the transducer to obtain the maximum response from the 3/4T hole after the beam has bounced from the opposite surface (5/8 node '
response) and adjust the selected gate controls to include all metal travel- between the entry surface reflection and this indication.
6.3.5 Set the trace and gate baselines to'zero percent of scale.
- 6. 3. 6- Position the transducer to obtain the max'imum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 80% + IdB of full screen height. Mark the peak of the indication on the screen.
Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the
- p. indication.
6.3.7 Without changing instrument settings move the transducer to obtain the maximum responses from the other calibration holes including the 5/8 node response from the 3/4T hole.
Mark the peaks of the indications on the screen. Record indication amplitudes and transit times from the water / steel interface to the indications. If the 5/8 node i response from the 3/4T hole is not readily discernable, the DAC curve amplitude point shall be determined by calculating the dB difference between the 1/2T and 3/4T l
reflector amplitudes, decreasing the 3/4 T reflector -
amplitude by two times that difference, and marking the l
l resulting amplitude at the point on the sweep that represents the transit time to the 5/8 node position.
l ,
6.3.8 Draw a line through the maximum response points on the CRT screen. The curve may be extrapolated at either end for a i E E sE E
October 5, 1982 15 74 $'e March 16, 1983
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e 1N167M/46M830330 I'SY"154Rev.1 distance of one quarter the thickness of the calibration block. This line represents the basic calibration distance amplitude curve (DAC).
6.3.9 Without changing the. instrument settings position the transducer to obtain a maximum response from the square notch on the opposite surface, if applicable. Record the indication amplitude and transit time from the water / steel interface to the indication.
6.3.10 Adjust the EBS pulse train to follow the DAC. Record the EBS control settings.
6.3.11 The electronic DAC module function shall then be initiated.
6.3.11.1 Adjust the electronic DAC controls so all EBS pulses at transit times from the entry surface V reflection to and including the response from the 1/4T. hole are nominally 80% FSH and those at transit times in excess of the 1/4T hole to the end of the gate are nominally 40% FSH.
6.3.11.2 Adjust the gate threshold (alarm level) to 16%
FSH and set for positive trigger.
6.3.11.3 Disable the EBS, scan the block, and obsdrve the responses from each applicable calibration reflector. The amplitude of the 1/4T hole shoulde be at 80% FSH 1 IdB and the amplitudes of the 1/2T, 3/4T, and 5/8 node response from the 3/4T hole should be at 40% FSH 2 IdB. If not, review steps 6.3.1 through 6.3.11.3.
6.3.11.4 Decrease the receiver gain by 6dB. Switch the system to the cycle mode and scan the transducer E$E a E October 5, 1982 M N d M, lE
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- '"IM'"154 Rev. I EN167M/46M830330 assembly over the calibration block at or greater than the specified examination speed.
The gate alarm shall actuate when the peak '
amplitude from each hole is detected. Decrease the receiver gain by an additional 8dB and once again scan over the block at or higher than the specified examination speed. The alarm should actuate when the peak amplitude from the 1/4T hole is detected. If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g.,
alarm count, repetition rate, alarm level, etc.)
which may require adjustment and make corrections, if necessary.
6.3.11.5 Increase the receiver gain by 14dB any record q) all pertinent calibration data on the i
kS calibration data sheets.
4 6.3.12 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length. Record the reflector i
identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.
6.4 Calibration for Examination of'the Flange-to-Upper Shell Weld From the Flange Seal Surface .
Complete coverage of the reactor vessel flange-to-upper shell weld from the seal surface typically requires interrogation by
, longitudinal waves at 0 and at one or two other angles. The sE
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N167M/46MS30330 **'"ISY"154Rev.1
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specific angles depen'd on the vessel flange dimensions and design
! and are defined in the plant specific Examination Pro ~ gram Plan.
System calibration for each inspection channel / transducer
! combination shall be performed as described below.
6.4.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank.
6.4.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and 1 adjust for the required waterpath.
I 6.4.3 Adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT.
. J 6.4.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse I and entry surface reflection are displayed on the CRT screen. Record the transit timc to the, entry surface reflection.
1 .
- 6.4.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be. moved to c'oincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time
- measurements can be made in this manner.
i
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t 6.4.3.3 Determine the sound velocity and measure the water temperature. Record these values.
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[ECME October 5, 1982 18 g,
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-e NUMBER & REV -
1N167M/46MS30330 15I-154 Rev. 1 nv y , Round Trip Distance Travel Time 6.4.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.
6.4.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and -
the reflection from the reference hole at the longest test metal distance occupies 60% to 90%
of the full sweep length.
6.4.4.2 Record the transit time between the entry
, surface reflection and the reflection from the-reference hole. '
i 6.4.4.3 Calculate the sound velocity in the calibration i
block and record this value.
6.4.4.4 Adjust the selected gate controls to include all -
, metal travel including the weld and specified 1
adjacent base material on the shell and flange sides of the weld.
6.4.5 Set the trace and gate baselines to zero percent of scale.
6.'4.6 Position the transducer to obtain the maximum response ,
from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 80% + idB of full screen .
height. Mark the peak of the indication on the screen.
Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.
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"'"I'Si""154Rev.1
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l 6.4.7 Without changing instrument settings move the transducer to obtain the maximum responses from the remaining
. calibration holes. Mark the peak of the indications on the screen. Record the indication amplitudes and transit times.from the water / steel interface to the indications.
4 6.4.8 Draw a line through the maximum response points on the CRT t -
screen. Thb curve may be extrapolated at either end for a distance of one quarter the thickness of the calibration block. This line represents the basic calibration distance amplitude curve (DAC).
6.4.9 Adjust the EBS pulse train to follow the DAC. Record the EBS control settings. '
6.4.10 The electronic DAC module function shall then be initiated.
h
! 6.4.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally 80% FSH.
6.4.10.2 Adjust the gate threshold (alarm level) to 16% ,
FSH and set for positive trigger.
6.4.10.3 Disable the EBS, scan the block, and observe the
- responses from each applicable calibration
! reflector. The amplitude of each should'be at l 80% FSH + IdB. If not, review steps 6.4.1 l through 6.4.10.3.
l
! 6.4.10.4 Decrease the receiver gain by 14dB. Switch the system to the cycle mode and scan the transducer l
l assembly over the calibration block at or I greater than the specified examinat. ion speed.
The gate alarm shall actuate when the peak response from each hole is detected. If the
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"'"I'Si'"154Rev.1 N167M/46M830330 alarm is not observed for one or more of the
! holes, investigate to identify the test system parameter (s) (e.g. , alarm count, repetition i rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.4.10.5 Increase the receiver gain by 14dB and' record j ,
all pertinent calibration' data on the calibration data sheets.
{ 6.4.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which i fall within the gated sweep length. Record the reflector '
identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit v times representative of those for the primary reflectors
! in the basic calibration block where practical.
f 6.5 Calibration for Examination of Nozzle-to-Shell Welds from the Nozzle
- Bore Complete coverage of nozzle-to-shell welds from the nozzle bore l typically requires interrogation by longitudinal waves at one angle normal to the weld and at one other angle to account for geometry.
The specific angles required depend on the nozzle dimensions and
! design and are defined in the Examination Program Plan. System calibration for each inspection channel / transducer combination shall f be performed as described below.
i i
6.5.1 Attach the transducer to the appropriate fixture for the I
required incident angle and mount the assembly to the manipulator in the calibration tank.
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N167M/46M830330 151-154 Rev. 1
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'.5.2 6 Position th'e transducer to direct the sound beam toward the appropriate surface of the calibration block and
- adjust for the required waterpath.
- 6. 5'. 3 Adjust the instrument delay such that-the lower left corner of the initial pulse starts at the 0 gradicule on the CRT.
6.5.3.1 Adjust the instrument range to the maximum 3 achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen. Record the transit time to the entry surface reflection.
6.5.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in
- units of time, the gate can be moved to coincide d with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.
j 6.5.3.3 Determine the scund velocity and measure the water temperature. Record these values.
i
.y _ Round Trip Distance Travel Time 6.5.4 Adjust the instrument delay such that the lower left
! corner of the entry surface reflection starts at the 0 gradicule on the CRT. *
'6.5.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and l
E E l
E October 5, 1982 22 c, 74 lE E March 16, 1983
N16 i/46M830330 '"IN'"154Rev.1 the reflection from the reference hole at the longest test metal distance occupies 60% to 90%
of the full sweep length.
6.5.4.2 Record the transit time between the entry surface reflection and the reflection from the reference hole.
6.5.4.3 Calculate the sound velocity in the calibration block and record this value.
6.5.4.4 Adjust the selected gate controls to include all metal travel which will include the entire nozzle, the weld, and specified adjacent base material on the shell side of the weld. Consult the Examination Program Plan to verify,that this gate length will. monitor the required
(\d'g examination volume.
6.5.5 Set the trace and gate baselines to zero percent of scale.
6.5.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set I the indication amplitude to 80% (+ idB) of full screen height. Mark the peak of the indication on the screen.
Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the
! indication.
6.5.7 Without changing instrument settings move the_ transducer I
! to obtain'the maximum responses from the remaining calibration holes. Mark the peak of the indications on lO i
I cwe October 5, 1982 f '$'e o ,,c, 8 cr A '
l
$$f NSID noysen , ,ey 1N167M/46M830330 ISI-154 Rev. 1
(8 xl the screen. Record the indication amplitudes and transit times from the water / steel interface to the indications.
6.5.8 Draw a line through the maximum response points on the CRT screen. The curve may-be extrapolated at either end for a distance of one quarter the thickness of the calibration block. This line represents the basic calibration distance amplitude curve (DAC).
6.5.9 Adjust the EBS pulse train to follow the DAC. Record the EBS control settings.
6.5.10 The electronic DAC module function shall then be initiated.
6.5.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally 80% FSH.
~
'*C 6.5.10.2 Adjust the gate threshold (alarm level) to 16%
FSH and set for positive trigger.
6.5.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration ,
reflector. The amplitude of each should be at 80% FSH + IdB. If not, review steps 6.5.1 through 6.5.10.3.
l 6.5.10.4 Decrease the receiver gain by 14dB. Switch the system to the cycle mode and scan the transducer --
assembly over the calibration block at or j greater than the specified examination speed.
The gate alarm shall actuate when the peak response from each hole is detected. If the alarm is not observed for one or more of the I (n) u/
holes, investigate to identify the test system parameter (s) (e.g. , alarm count, repetition E ECTWE 0 October 5, 1982 ,,3, 24 g, 74 "fd" o March 16, 1983
.~W NSID N167M/46MS30330 **'"I51'"154Rev.l'
, rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.5.10.5 Increase the receiver gain by 14dB and record all pertinent calibration data on the calibration data sheets.
i 6.5.11 Position the transducer to obtain th'e peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length. Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit i times representative of those for the primary reflectors in the basic calibration block where practical'. ,
D .
U 6.6 Calibration for Examination of Nozzle Radii cr.d Protrusions t
System calibration for each angle beam inspection channel / transducer combination used for nozzle radius and protrusion examination shall be performed as described below.
6.6.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank.
- 6.6.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath. <
! 6.6.3 Position the transducer to obtain a maximum response from
! the side drilled hole at the longest test metal distance O
\
V "E SEo
((EE Ctober 5, 1982 25 o, 74 o March 16, 1983
. W~ NSID
- '"IM'"154Rev.1 N167M/46M830330 and adjust 'the instrument delay such that the lower left corner of the initial pulse starts at the O'gradicule on the CRT.
J 6.6.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen. Record the transit time to the entry surface reflection.
l 6.6.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time h measurements can be made in this manner.
R 6.6.3.3 Determine the sound velocity and measure the L water temperature. Record these values.
y _ Round Trip Distance Travel Time l
l 6.6.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at th'e 0 gradicule on the CRT.
6.6.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the response from the reference hole at the longest test metal distance occupies 60fs to 90?s of the full sweep length.
"$EE October 5, 1982 26 74 RE]E March 16, 1983
, g,
416 4/46M830330 **'"Ihl'"154Rev.i 6.6.4.2 Record the transit time between the entry surface reflection and the side drilled hole response.
6.6.4.3 Calculate the sound velocity in the calibration block and record this value.
6.6.4.4 Adjust the selected gate controls to include all metal travel between the entry surface reflec-tion and the. response.from the specified side drilled hole at the longest test metal distance.
6.6.5 Set the trace and gate baselines to zero percent of scale.
- l 6.6.6 Position the transducer to obtain the maximum response fromthedrilledholewhichexhibitsthehighesi O amplitude. Adjust the preamplifier gain control to set the indication amplitude to 80's + idB of full screen height. Mark the peak of the indication on the screen.
Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the-indication.
f
- 6.6.7 Without changing instrument settings move the transducer to obtain the maximum responses from the other calibration
!. hole. Mark the peak of this indication on the screen.
Record the indication amplitude and transit time from the l
water /stee.1 interface to the indication.
6.6.8 Draw a line through the maximum response points on the CRT screen. The curve may be extended at either.end for a l
distance equivalent to one quarter the depth of the deepest hole. This line represents the basic calibration distance amplitude curve (DAC).
E((E E
October 5, 1982 ,,G, D g, M SE oA E '
.' W ~ NSIO N167M/46MS30330 * '"I'SY"154 Rev. 1 6.6.9 Adjust the'EBS pulse train to follow the DAC. Record the >
EBS control settings.
6 6.10 The electronic DAC module function shall then be initiated. ,
i 6.6.10.1 Adjust the electronic DAC controls so all EBS
,' pulses are nominally 80% FSH.
6.6.10.2 Adjust the gate threshold (alarm level) to 16% :
FSH and set for positive trigger.
6.6.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector. The amplitude of each should be 80%
FSH + IdB. If not, review steps 6.6.1 through 6.6.10.3.
p Y 6.6.10.4 Decrease the receiver gain by 14dB. Switch the system to the cycle mode and scan the transducer !
assembly over the calibration block at or :
greater than the specified examination speed.
- The gate alarm shall actuate when the peak response frem each hole is detected. If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.6.10.5 Increase the receiver gain by 14dB and record ,
all pertinent calibration data on the calibration data sheets.
) 6.6.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which "F[ECM o
October 5, 1952 28 c, N "((g" o
h6 M, MM
.N16 M/46M830330 *"'"I'SY"154Rev.1 fm
'(,) fall within the gated sweep length. Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.
6.7 Calibration for Angle Beam Examination of Noz;1e-to-Safe End Welds System calibration for each angle beam inspection channel / transducer combination used for safe end inspection shall be performed as described below. When the calibration block is a mockup of the bimetallic weld, calibration shall be_from the side of the weld, carbon steel or stainless steel, corresponding to the side of the weld from which the exa.cination will be performed. ,
C1
~
G 6.7.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly to the manipulator in the calibration tank.
6'7.2
. Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.
6.7.3 ' Position the transducer to obtain a maximum response from the side drilled hole at the longest test metal distance and adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT.
6.7.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse O
f[EE October 5, 1982 29 74 "QSED c
March 16, 1983
' W
~ NSID fn67M/46M830330 ***"I'Si'*154Rev.1 v' a'nd entry surface reflection are displayed on
~
the CRT screen. Record the transit time to the entry surface reflection.
6.7.3.2 Since the gate position controls of the ultrasonic system a,re calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.
l 6.7.3.3 Determine the sound velocity and measure the water temperature. Record these values, y _ Round Trip Distance Travel Time ON Q
6.7.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT. .
i 6.7.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the response from the side drilled hole at the longest test distance occupies 50's to 70% of the l full sweep length.
6.7.4.2 Record the transit time between the entry surface reflection and the response from the drilled hole at the longest test distance.
'6.7.4.3 Calculate the sound velocity in the. calibration block and record this value.
t
((EE October 5, 1982 30 g, 74 Sy'SEo g g March 16, 1983
.- -_ - . = .
i.
' NUMBER & REV
.N167M/46M830330 151-154 Rev. 1 O
- V 6.7.4.4 Adjust the selected gate controls to include all metal travel from the entry surface reflection to the equivalent of 1/4T past .the 3/4T hole as '
a minimum.
6:7.5 Set the trace and gate baselines to zero percent of scale.
6.7.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 40% + idB of full screen height. Mark the peak of the-indication on the screen.
Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.
6.7.7 Without changing instrumerit settings move the transducer 6 to obtain the maximum responses from the other calibration holes. Mark the peaks of these indications on the screen. Record the indication amplitudes and transit time I from the water / steel interface to the indications. .
6.7.8 Draw a line through the maximum response points on the CRT screen. The curve may be extrapolated at either end for a distance of one quarter the thickness of the calibration l block. This line represents the basic calibration distance amplitude curve (DAC).
! 6.7.9 Adjust the EBS pulse train to follow the DAC. Record the EBS control settings.
i
!O i
"Et i
E$E a g "E October 5, 1982 ,,G, M c, M o^T b 8
%&P NSID
~5N167M/46M830330 """'"1bY"154Rev.1
('~'T .
\_-) 6.7.10 The electronic DAC module function shall then be initiated.
6.7.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally 40% FSH.
6.7.10.2 Adjust the gate threshold (alarm level) value to 16% FSH and set for positive trigger.
6.7.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector. The amplitude of each should be 40%
FSH + idB. If not, review steps 6.7.1 through 6.7.10.3.
6.7.10.4 Decrease the receiver gain by 6dB. Switch the system to the cycle mode and scan the transducer assembly over the calibration block at or
{}.
'sGJ greater than the specified examination speed.
The gate alarm shall actuate when the peak response from each hole is detected. If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.7.10.5 Increase the receiver gain by 6dB and record all pertinent calibration data on the calibration data sheets.
6.7.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which
' fall within the gated sweep length. Record the reflector (n
q ;) identification, indication amplitude, and transit time to the indication from the initial pulse.
ECTAE
((7 October 5, 1982 ,,9 32 c, 74 AEQSEo g, March 16, 1983
,- 4167. /46M830330 ' .
I'SI'-154 Rev. 1
- j. Reflectors' selected for this step shall provide transit times representative of those for the primary reflectors l in the basic calibration block where practical.
1 6.8 Cal'ibration for Examination of Reactor _ Vessel Flange Ligaments System calibration for each straight ~ beam inspection channel /
transducer combination used for flange ligament inspection shall be performed as described below.
1 6.8.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly to the manipulator in the calibration tank.
6.8.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.
6.8.3 Adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT. .
6.8.3.1 Adjust the instrument range control to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen. Record the transit time to the entry surface reflection.
6.8.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.
E E o E October 5, 1982 ,,G, M Oy M "@"
o kd M, im L,_ _ _ _ _ . _ _ . . . _ . , _ _ _ _ . _ - - --
"~ - ~ '
' ~N NSID
- N167M/46M830330 * *'"I's"I'-l54 Rev. 1 6.8.3.3 D~termine e the sound velocity and measure the j water temperature. Record these values.
y Round Trip Distance Travel Time 6.8.4 Adjust the instrument delay such that the lower left corndr of the entry surface reflection starts at the 0 gradicule on the CRT.
6.8.4.1 Adjust the. instrument range such that metal j travel between the entry surface reflection and the reflection from the applicable reference hole at the longest test metal distance occupies 60?; to 90is of the full sweep length.
6.8.4.2 Record the transit time between the entry V surface reflection and the reflection from the reference hole.
4 6.8.4.3 Calculate the sound velocity in the calibration ,
block and record this value.
- 6.8.4.4 Adjust the selected gate controls to include all metal travel between the water / steel interface and the far limit of the inspection volume as j defined in the Examination Program Plan. This distance shall be the equivalent of one stud hole diameter, as a minimum.
4 i
- 6.8.5 Set the trace and gate baselines to zero percent of scale.
i i 6.8.6 Position the transducer to obtain the maximum. response frcm the side drilled hole which exhibits the highest j
amplitude. Adjust the preamplifier gain control to set E "E
"'[7E o October 5, 1982 ,,3, M c, M oA E '
%NP
' ~~ NSID """"
N167M/46M830330 I'SY"154Rev.1
)
(.,/ the indication amplitude to 40% (1 IdB) of full screen height. Mark the peak of the indication on the screen.
Record instrument settings, indication amplitude, and transit time from the entry surface reflection to the indication.
6.8.7 Without changing instrument settings move the transducer to obtain~the maximum responses fros, the remaining calibration holes. Mark the peak of the indications on the screen. Record the indication amplitudes and transit times from the water / steel interface to the indications.
6.8.8 Draw a line through the maximum response points on the CRT screen. The curve may be extrapolated at either end for a distance of one quarter the thickness of the calibration block. This line represents the basic calibrat{on
(~~' distance amplitude curve (DAC).
Qli. :
6.8.9 Adjust the EBS pulse train to follow the DAC. Record the EBS control settings.
6.8.10 The electronic DAC module function shall then be initiated.
6.8.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally 40% FSH.
l 6.8.10.2 Adjust the gate threshold (alarm level) value to 16% FSH and set for positive trigger.
6.8.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration .
reflector. The amplitude of each should be at 40% FSH 1 IdB. If not, review steps 6.8.1
(/m) through 6.8.10.3.
E E o E October 5, 1982 Og oT '
PAGE l -. _ _ _ _ - _ - _ _ -
N16 i/46MS30330 " "I'SY"154 Rev. 1 6.8.10.4 Decrease the receiver gain by 6dB. Switch the
- system to the cycle mode and scan'the transducer
! assembly over the calibration block at or greater than the specified examination speed.
The gate alarm shall actuate when the peak '
response from each hole is detected. If the q.
alarm is not observed for one or more of the
- holes, investigate to identify the test system l parameter (s) (e.g., alarm count, repetition
- rate, alarm level, etc.) which may require adjustment and make corrections, if'necessary.
6.8.10.5 Increase the receiver gain by 6dB,and record all '
! pertinent calibration data on the calibration data sheets.
6.8.11 Position the transducer to obtain the peak responses from d at least three cylindrical reflectors in the MTS which
. fall within the gated sweep length. Record the reflector 4 identification, indication amplitude, and transit time to the indication from the initial pulse.
1 Reflectors selected for this step shall provide. transit times representative of those for the primary reflectors j in the basic calibration block where practical.
! 6.9 Calibration for Full Node Angle Beam Examination of Vertical and Circumferential Vessel Welds g I
j System calibration for each inspection channel / transducer ccmbination used for full node angle beam examination of the volume of material near the vessel inside diameter shall be performed as l
i described'below. .
'O .
j (('gemt October 5, 1982 3 6 ', 74 $$ FED March 16, 1983
5A/
~~ NSID N167M/46M830330 """"'"Ihi'"154Rev.1
( 6.9.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank. '
f 6.9.2 Position the transducer to direct the sound toward the appropriate surface of the calibration block at the
- required waterpath. Record the transit time from the initial pulse to the entry surface reflection.
6.9.3 Position the transducer to obtain a maximum full node response from the square notch.on the entry surface of the block.
6.9.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0
[
- gradicule on the CRT. ,
, 8 o' 6.9.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the notch response occupies 50% to 80% of the full sweep iength.
6.9.4.2' Record the transit time between the entry surface reflection and the notch response.
6.9.4.3 Adjust the selected gate controls to include all metal travel between the 7/8 node and 1 1/8 node responses from the 1/4T hole.
6.9.5 Set the trace and gate baselines to zero percent of scale.
6.9.6 Adjust the preamplifier gain control to set the notch fu11 node response indication to 40% + ldB of full screen
() height. Mark the peak of the indication on the screen.
E E SE March 16, 1983 E
Octocer 5, 1982 ,
37 ,
74 "Eg o
- - - _ . . - . - . - - - - - _ - , . - . - - - --_ _ - _._ - - -_ - _= - - ___ - _
.' W NSID #
EN167M/46M830330 " '"I'51*-154 Rev. 1 Record instrument settings, indication amplitude, and transit time from the entry surface reflection to the indication.
6.9.7 Draw a horizontal line through the maximum response point
- on the CRT and extend it to include the entire gate length. This line represents the basic calibration distance amplitude curve (OAC).
- , 6.9.8 Adjust the EBS pulse train to follow the DAC. Record the L EBS control settings.
6.9.9 Adjust the gate threshold (alarm level) to 16% FSi and set for positive trigger.
4 4
.j 6.9.9.1 Disable the EBS, scan the block, and observe the
) . response from the notch. The amplitude should
.i be at 40% FSH + IdB. If not, review steps i 6.9.1 through 6.9.9.1.
y 6.9.9.2 Decrease the receiver gain by 6dB. Switch the.
system to the cycle mode and scan the transducer ,
, over the calibration block at or greater than
~
the examination speed. The gate alarm should
,, actuate when the peak response from the notch is detected. If the alarm is not observe'd for one or more of the holes, investigate to identify the test system parameter (s) (e.g. , alarm count, j repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.9.9.3 Increase the re:eiver gain by 6dB and record all l pertinent calibration data on the calibration
( data sheets.
l E
October 5,1982 38 g, M "Ee* h6 M, MM
{[7E ,,,, o
1 . .
N1 7./46M830330 * ""I'S"I'"154 Rev. 1 i
() 6.9.10 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length. Record the reflector '
identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide t'ransit times representative of those for the primary reflectors in the basic calibration block where practical.
6.10 Calibration for Near Surface Examinations System calibration for each inspection channel / transducer combination used for near surface examination of volumes of material near the vessel inside diameter shall be performed as described below. ,
'* / 6.10.1 Transducers used for these examinations shall be dual-element, transmit-receive, 2.25 MH'z units of the type Ultran WKSI-2.25 WRV, WPSI-2.25 WRV, or equivalent. The nominal waterpath shall be 6.0 inches and the nominal- _
incident angle shall be 12.5 unless otherwise specified.
6.10.2 Attach the transducer to the appropriate fixture for the l required incident angle and mount the assembly on the manipulator in the calibration tank.
4 6:10.3 Position the transducer to direct the sound beam toward the appropriate surface of the calibration. block at the required waterpath. Record the transit time from the initial pulse to the entry surface reflection.
4 l NOTE
() It may be necessary to increase the gain and/or use one search unit element in the pulse-echo mode to obtain a discernable entry surface reflection.
E'lTE o October 5, 1902 ,,gg 39 cr 74 lEAE SIC '
N167 /46M530330 _ " "I'SY'154 Rev. 1 6.10.4 Position th'e transducer to obtain a maximum response from the 1/8-inch diameter side drilled hole located 3/4-inch in depth from the entry surface.
6.10.5 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.
6.10.5.1 Adjust the instrument range such that metal travel between the entry surface reflection and the response from the 1/8" diameter side drilled hole at 3/4-inch depth occupies 50% to 75% of the full sweep range.
6.10.5.2 Record the transit time between the entry surface reflection and the hole response.
t O' N 6.10.5.3 Adjust the selected gate controls to include as a minimum all metal travel from the lower left corner of the entry surface reflection to at least 10 microseconds past the response from the ,
1/8-inch diameter hole at 3/4-inch depth.
6.10.6- Set the trace and gate baselines to zero percent of scale.
6.10.7 Adjust the preamplifier gain control to set the indication
- from the 1/8-inch diameter hole at 3/4-inch depth to 80%
+ ldB of full screen height. Mark the peak of the indication on the screen.
6.10.8 Without changing instrum'ent settings move the transducer -
to obtain maximum responses from the two remaining
' calibration' holes and the square notch on the. entry surface of the block.
E "E D E October 5, 1982 ,,g,
@ g, M oA E b 5
' ~W NSID
.N167M/46M830331 * ' h l'"154 Rev.,1 6.10.9 Record instrument settings, indication amplitudes (i.e.,
100% FSH + 6dB), and transit times from the water / steel interface (see Note Paragraph 6.10.5) to_the indications.
- 6.10.10 Draw a horizontal line through the response from the 3/4 inch deep hole on the CRT screen. The curve shall be extrapolated at either end to cover the entire. gate length as set in Paragraph 6.10.5.3. -
6.10.11 Adjust the EBS pulse train to follow the DAC. Record the EBS control settings.
6.10.12 Adjust the gate threshold (alarm level) to 40% FSH and set for positive trigger.
6.10.12.1 Disable the EBS, scan the block, and observe the
., response from the 1/8 inch diameter side drilled v._ hole at 3/4 inch depth. The amplitude should be at 80% FSH + IdB. If not, review steps 6.10.2 through 6.10.12.1.
6.10.12.2 Dec'rease the receiver gain by 6dB. Switch the system to the cycle mode and scan the transducer over the calibration block at or greater than the examination speed. The gate alarm shall actuate when the peak response from the 3/4 inch deep 1/8 inch diameter side drilled hole is detected. If the alarm is not observed, investigate to identify the test . system parameter (s) (e.g. , alarm count, repetition rate, etc.) which may require adjustment and make corrections, if necessary.
O EllE October 5, 1982 E
PAGE OF DA E '
4
'~ W NSID N167M/46M830331 **'31'"154Rev.1 6.10.12.3 Increase the receiver gain by 6 dB and record all pertinent calibration data on'the calibration data sheets.
, 6.10.13 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall with'in the gated sweep length. Record the reflector i
identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit
. times representative of the transducer focal distance, approximately nine inches in water.
6.11 Beam Sp.ead Measurements Beam spread measurements shall be made for each transducer used d during the inspection program. Data will be recorded on the appropriate calibration data sheet.
6.11.1 Establish the location of the scribe line on the reference ,
block as a zero reference point.
6.11.2 Position the transducer to obtain the maximum indication amplitude from the applicable calibration hole at the 4
nearest test distance in the appropriate. basic calibration block. Record the manipulatc,r carriage location with respect to the zero reference point and the transit time -
to the indication.
6.11.3 Move the transducer toward the reference hole until the indication amplitude drops to 50's of its peak amplitude.
Record the manipulator carriage location with. respect to the zero reference point and the transit time to the indication. Move the transducer toward the reference hole E E RE SEo 9 E Ctober 5, 1982 42 74 e March 16, 1983
NNP NSID
' ~~.N167M/46M330331 . "'"*'ISl154Rev.1
(~^; .
(,,,/ until the indication amplitude drops to 20% of its peak amplitude and record data defined above.
6.11.4 Move the transducer away from the reference hole until the
~
indication amplitude passes through maximum and again drops to 50% of its peak amplitude. Record the manipulator carriage location with respect to the zero reference point and the transit time to the indication.
Move the transducer away from the reference hole until the indication amplitude drops to 20% of its peak amplitude and record data defined above.
6.11.5 Repeat these measurements on the other applicable calibration holes.
6.12 Field System Calibration
'~ d; On site the system calibration shall be established and verified with the EBS per Paragraph 6.12.1 at the beginning and end of each scan routine, with any change of equipment, or every four hours, whichever is less. Calibration shall be established and verified on the MTS cylindrical reflector array per paragraph 6.12.2 at the beginning and end of each series of examinations.
6.12.1 Enable the EBS and observe the pulse train.
6.12.1.1 If any point on the DAC curve has decreased by 20% or 2dB of its original amplitude, calibration shall be re-established and all areas since the previous acceptable calibration or check reexamined.
'6.12.1.2 If any point on the DAC curve has increased by
('j 20% or 2dB of its original amplitude, E SED
[fECD'vE October 5, 1982 ,,
43 g,
74 g, March 16, 1983
.W llSID
- "T51'"154Rev.1 E N167M/46MS30331 v calibration shall be re-established and all reportable indications since the ' previous acceptable calibration or check reevaluated.
6.12.2 Disable the EBS function and position the transducer array such that it is directed toward the cylindrical reflector array mounted on the tool 0 leg. Each applicable transducer / inspection channel should be checked as follows:
6.12.2.1 Position the transducer to obtain t'he peak responses from each cylindrical reflector in the MTS array used during initial system calibration at the specified waterpaths. Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse in microseconds, p
k-$ 6.12.2.2 The recorded values should be compared to the data obtained during the initial calibration at Waltz Mill.
6.12.2.2.1 If the response from any reflector has decreased by 20!s or l
2dB of its original amplitude, calibration shall be reestab-l lished and all areas since the previous acceptable calibration
- or check reexamined.
6.12.2.2.2 If the response from any I reflector has increased by 20?; or 2dB of its original amplitude, calibration shall be. reestab-l ) lished and all reportable E E October 5, 1982 AE SEo E
44 g,
74 g E March 16, 1983
. - 16 M/46M830331 ,
- 'E'"154Rev.1 indications since the previous acceptable calibration or check reevaluated.
6.12.2.2.3 If the response from any reflector in the gated sweep length has moved on the sweep line more than 10% of the sweep reading, cor' rect the sweep range calibration and note the l correction in the examination record. If recordable reflectors are noted on the data sheets, those data sheets shall be voided, the new calibration shall ;
be recorded, and areas' relative
.f 3 to the voided data re-examined.
Y ,
6.12.3 Verification of the performance of calibration checks j shall be documented. Documentation shall include the date, time, and initials of the operator. See Figure 6. ,
l i l 6.13 Transducer RF Waveforms .
i When photographic records of transducer RF waveforms are required, they shall be collected as follows. These records.may be mad'e at I
the calibration facility or at the reactor site.
l 6.13.1 Position the transducer to obtain the peak response from one of the cylindrical reflectors in the MTS array.
6.13.2 Display the RF waveform on a calibrated oscilloscope.
6.13.3 Adjust the oscilloscope sweep controls to clearly display
\
the waveform.
T'V
((Te October 5, 1982 45 74 Ese March 16, 1983 g,
w NSID
' ~ N167M/46MS30331 "* mfd 54Rev.1 6.13.4 Adjust the oscilloscope veritical display so the amplitude of the response is two to four centimeters.
9 6.13.5 Photograph the displayed waveform and record all pertinent data on the Transducer RF Waveform Data Sheet, Figure 7.
6.13.6 Photographic records of transducer RF waveforms collected after reactor vessel examinations should be made using the same reflector, electronics, waterpath and instrument settings as used prior to the examination's when practical.
7.0 EXAMINATION REQUIREMENTS 7.1 The following activities shall have been completed prior to the performance of any in-field ultrasonic examination of a reactor vessel using the remotely operated inspection tool.
fR. .
d 7.1.1 The reactor vessel Examination Program Plan identifying specific plant inspection parameters such as search unit incident angles, calibration standards, water paths, scan lengths, scan locations, and scan increments shall have .
been prepared in accordance with WNSID Procedure RV-ISI-01.
7.1.2 The ultrasonic equipment shall have been calibrated for l
i all examinations required by the Examination Program Plan l and all data recorded in accordance with paragraph 6.0 of this procedure. .
7 1.3 The reactor vessel inspection tool shall have been
- assembled in the configuration on the arrangement drawing applicable to the specific vessel being examined as listed
~
in the Examination .hogram Plan.
l t
E D E October 5, 1982 AE '
PAGE CF
W
~ ' NSIO N167M/46M830330 "'"IM'"154Rev.1 7.1.4 Prior to placing the inspection tool on th'e reactor vessel, the following tests and checks shall be performed to demonstrate the tool is fully operational and to assure the tool can be safely set on the reactor vessel.
7.1.4.1 Establish "home" position and record all resolver readings and other relevant data.
Mechanically measure the distance from the face of transducer zero (TRO) or transducer twenty (TR20) to the spherical target and record this value.
7.1.4.2 Test to ensure that all drives are functional both in manual and computer control.
I 7.1.4.3 Visually verify that all appropriate hardware is properly secured by lockwire or other suitable means.
7.1.4.4 Check each transducer and associated pulser / amplifier channel by tapping on the face I of the transducer and observing the initial pulse.
l 7.1.4.5 Cavity water clarity shall be adequate to assure l visibility of the vessel flange, keyways, and/or l core barre'l seating surface.
7.1.4.6 Verify that no specimen capsules are installed where the inspection tool legs will seat.
7.1.5 The calibration settings of each transducer /instrumenta-tion system shall be checked using the data previously entered in the Electronic Block Simultor (ESS) with the Sonic system control settings as defined on the Calibra-tion Data Sheets for each examination to be performed.
"E March 16, 1983 j fdEE October 5, 1982 47 y
74 o E l_ _ - __ _. . _ __ . _ . _ _ ___ . .
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'~ W NSID "
til67M/46M830330 " '"I'S"I-154 Rev. 1 A
V 7.1.6 Once the inspection tool is set on the reactor vessel the tool home position shall be verified by monitoring the TRO or TR20 straight beam inspection channel and positioning -
the search unit to obtain a peaked response from the i
spherical target without changing waterpath from that set mechanically in 7.1.4.1. Contact 'the control room, obtain the refueling water temperature, and record this value.
If the temperature is not within + 25 F of that used during calibration, advise the control room to notify when temperature is within this range. Water temperature may j be measured directly with a thermometer.
7.1.7 Calculate the water velocity, record this value, and Il compare with that determined during system calibration.
, 7.1.8 Check the instrument calibration and system calibration.
7.2 PriortoinitiatingascanperthedxaminationProgramPlan,the l --
flange area shall be subject to preliminary scans while monitorf.ng the TRO or TR20 inspection channel to determine that the tool is properly centered, level, and that water paths (compensated for-
. difference in water velocity, if necessary) correspond with those used during calibration.
(
7.3 The ' area to be examined shall be subject to a preliminary scan while l monitoring the TRO inspection channel to determine the thickness of the examination area, if possible. Use this information to verify l
that all gates have been set properly. If gating adjustments are I
necessary at any time during the examination they shall be '
documented. See Figure 8.
7.4 Each area of the reactor vesse'l identified in the Examination Program Plan shall be scanned in accordance with the requirements of i
the Examination Program Plan. .
I E
E October 5, 1982 ,,gE 4 g, M "Eg" o hd 16,1E
W
' ~ NSID N167M/46M830330 **'"I$l'"154Rev.1 7.4.1 The computer "home" routine shall be used to determine the actual reference position for the nine axe.s of tool move-ment at least once each day. When a computer "home" is -
achieved, a peaked response from the spherical target should ba observed on the TRO or TR20 inspection channel and the axes resolver readings sha'll be noted and compared with those original values recorded per paragraph 7.1.4.1.
7.5 During scanning the following parameters shall be maintained unless otherwise specified in the Examination Program Plan'.
7.5.1 Scanning shall be conducted at the calibration sensitivity.
7.5.2 The rate of search unit movement shall be 5 inches per second maximum.
7.5.3 Scan increments shall be three quarter inches maximum for di 1-1/2 inch diameter transducers and three-eighth inches maximum for 3/4 inch diameter transducers.
7.5.4 The required examination volume for welds shall include the weld, both heat affected zones, and one-half the weld' thickness of adjacent base material on both sides of the
- weld.-
7.6 .The following paragraphs provide general scanning requirements for
- - each area of the reactor vessel. ~pecific requirements are provided in the Examination Program Plan.
7.6.1 Base Metal Examination When specified in th'e Examination Program Plan, the base metal through which angle beams will pass shall be completely scanned by straight beam to detect laminar reflectors where practical.
E EcmE October 5', 1982 ,,cg 49 ,
74 "y'sE g g March 16, 1983
N16 /46M830330 "I'S$"154Rev.l' 7.6.1.1 Sensitivity shall be established at a location free of indications by adjusting the first back surface reflection to 80*' FSH. .
7.6.1.2 Set the back wall gate to monitor the back surface reflection and alarm when the echo amplitude drops to 16% FSH.
7.6.1.3 Areas in the base metal containing laminar indications that cause either or both of the following shall be recorded, a) All areas where indications are equal to or exceed the amplitude of the remaining back reflection.
b) All areas that produce a continubus total A
Q loss of back reflection accompanied by a continuous indication in a singular plane.
7.6.1.4 Areas identified per paragraph 7.6.1.3 shall be
~
recorded on the data printout in terms of the transit time to the indication, peak indication amplitude, remaining backwall amplitude, location, and extent.
i 7.6.1.5 Areas identified per paragraph 7.6.1.3 a) shall j be investigated to determine if and to what i extent they interfere with angle beam examina- .
tions. Where the reflectors do interfere, the angle beam technique (s) shall be reviewed toward achieving'at least the minimum reauired coverage of the volume required to be examined, and modified to the extent necessary and practical O to accomplish this.
cme E$'e a October 5, 1982
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N167M/46M830330 "'"Ihl'-154Rev.1 7.6.1.6 Areas identified per paragraph 7.6.1.3 b) shall be investigated in terms of the. appropriate acceptance criteria for laminar reflectors.
7.6.1.7 Alternately, the base metal examination may.be conducted as an extension of straight beam examination in accordan~ce with paragraph 7.6.2.1 provided the sensitivity is at least that required in paragraph 7.6.1.1 and the gating and alarm requirements of paragraph 7.6.1.2 are employed.
7.6.2 ' Vertical and Circumferential Vessel Welds The extent of each reactor vessel vertical and/or circumferential weld identified in the Examination Program A. Plan shall be examined in accordance with the following requiroments where practical.
7.6.2.1 The entire weld, both heat affected zones, and specified adjacent base material are examined .
from the vessel ID by longitudinal waves at 0 .
l 7.6.2.2 The entire weld, both heat affected zones, and l specified adjacent base material are examined from the vessel ID by transverse waves at'two angles, th'e difference between which shall be at least 10 , in two opposite directions parallel --
to the weld and two opposite directions perpendicular to the weld. For purposes of j' minimum required coverage, adjacent base material need not be examined with both angle l beams in both directions. Any combination of two angle beams will satisfy this requirement.
"E E E
o TE October 5, 1982 ,,G, H g, M o^
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.W NSID
~
N167M/46M830330 * **'S$'-154 I Rev. 1 1
7.6.3 Reactor Vessel Flange-to-Upper Shell Weld The extent of the reactor vessel flange-to-upper shell weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.
7.6.3.1 The reactor vessel flange-to-upper shell weld, both heat affected zones, and specified adjacent base material are examined from the vessel flange seal surface using longitudinal waves at angles as defined in the Examination Program Plan.
7.6.3.2 When the core barrel is removed the flange-to-upper shell weld may be examined fromithe vessel-( 10 in accordance with Paragraph 7.6.2, except W angle beam scanning perpendicular to the weld will be' performed from the vessel shell side i
only.
7.6.4 Reactor Vessel Nozzle-to-Shell Welds The extent of each reactor vessel nozzle-to-shell weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical . -
7.6.4.1 The reactor vessel nozzle-to-shell weld, both heat affected zones, and specified adjacent base material are examined from the nozzle bore using longitudinal waves at angles as defined in the Examination Program Plan.
O ewe October 5, 1982 M Nd M, lE
'$'g a ,,G, g, M "',7 o
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N~ NSID N167M/46M830330 "'"I$2'"154Rev.1 p
V NOTE RHR flow should be off or reduced'to the extent possible during this examination. Water clarity shall be such that the nozzle opening is clearly visible from the operating deck.
7.6.5 Nozzle Radius and Protrusion The extent of each nozzle radius or protrusion identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.
7.6.5.1 The entire area defined by the Examination Program Plan is examined from the nozzle ID by transverse waves in both circumferential directions.
- NOTE RHR flow should be off or reduced to the extent possible during this examination. Water clarity shall be such that the nozzle opening is clearly visible from the operating deck.
7.6.6 Nozzle-to-Safe Ends Welds The extent of each reactor vessel nozzle-to-safe end weld i identified in the Examination Program Plan shall be
- examined in accordance with the following requirements where practical.
I 7.6.6.1 The entire weld, both heat affected zones, and
, specified adjacent base material are examined from the nozzle bore by longitudinal waves at 0 .
).
d "E
E D E October 5, 1982 ,,,,
9 g, M oA E '
. W NSIO muoegn o n'y.
AN167M/46M830330
- ISI-154 Rev. 1 7.6.6.2 The entire weld, both heat affected zones, and 4
specified adjacent base material are examined from the nozzle bore by angled. longitudinal waves in two directions parallel to the weld and two directions perpendicular to the weld.
NOTE RHR flow should be off or' reduced to the extent possible during,this examination. Water clarity shall be such that the nozzle opening is clearly visible from the operating deck.
7.6.7 Reactor Vessel Flange Ligaments The extent of the threaded ligaments in the reactor vessel flange identified in the Examination Program P1pn shall be
/] examined in accordance with the following requirements where practical.
7.6.7.1 The ligaments between threaded stud holes are examined from the top of the flange using longitudinal waves at 0 .
7.6.8 Full No'de Angle Beam Examination of Vertical and Circumferential Vessel Welds When full node angle beam examinations are specified, the extent of each reactor vessel vertical and/or circumfer-ential weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical . ,
(
v .
cme October 5, 1982 M cr E$'e o ,,G, M Ae '
N167 /46MS30330 **'DI'"154Rev.1 Q
,V 7.6.8.1 The volume of material including the weld, both heat affected zones, and specified adjacent base material within 1/8T of the vessel ID shall be examined in two directions parallel to the weld and two directions transverse to the weld.
7.6.9 -Near Surface Examinations of Vertical and Circumferential Vessel Welds When near surface examinations are specified, the extent of each reactor vessel vertical and circumferential weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.
7.6.9.1 The volume of material including the weld, both heat affected zones, and specified adjacent base C material within one inch of the vessel ID shall be examined in two directions parallel to the weld and two directions transverse to the weld.
8.0 INTERPRETATION AND INVESTIGATION 8.1 The Level II or Level III examiner shall interpret indications in accordance with criteria listed below such that he can assess their being valid or not valid.
8.1.1 The interpretation and investigation level is 50% of the l
primary reference DAC for:
8.1.1.1 All indications detected during straight beam examinations of vertical and circumferential welds.
l CTWE E
D TE October 5, 1982 ,,G,
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- - = - - - - . - -- - -
N16 /46M830330 "##'"IS $f154 Rev. 1
'N
, 8.1.1.2 Indications detected during angle beam examinations of vertical and circumferential i
welds at transit times representing 25 percent and greater of the vessel through wall thickness measured from the inner surface.
a 8.1.1.3 Indications detected during examinations of the flange-to-upper shell weld from the seal surface at locations representing 25 percent and greater of the vessel through-wall thic'kness measured from the inner surface.
, 8.1.1.4 Indications detected during examinations of nozzle-to-shell welds from nozzle bores at locations representing 25 percent and greater of the vessel through-wall thickness meaqured from the inner surface.
( d.').
8.1.1.5 All indications detected during straight and angle beam examinations of nozzle-to-safe end welds. .
8.1.1.6 All indications detected during examinations of reactor vessel flange ligaments.
8.1.1.7 All indications detected during full node angle beam examinations of vertical and circumferen-tial welds.
i 8.1.1.8 All indications detected during near surface examinations. .
8.1.2 The interpretation and investigation level is 20% of the
(') primary reference DAC for:
E ECDVE RE SEo October 5, 1982 ,
56 ,
74 March 16, 1983
4167M/46M830330 . "MI'#154 Rev. 1 8.1.2.1 Indications detected during angle beam examinations of vertical and circumferential welds at transit times which represent the inner 25 percent of the vessel through-wall thickness measured from the inner surface.
8.1.2.2 Indications detected during examinations of the flange-to-upper shell weld from the seal surface at locations which are within 25 percent of the
- vessel through-wall thickness measured from the inner surface.
8.1.2.3 Indications detected during examinations of nozzle-to-shell welds from nozzle bores at locations which are within 25 percent of the vessel through-wall thickness measured from the inner surface.
8.1.2.4 All indications detected during examinations of nozzle radii and protrusions.
8.2 Valid indications are the result of flaw reflectors such as cracks, l lack of penetration, lack of fusion, inclusions, slag and porosity.
All other indications are considered not valid, including those due to: scanning noise, grain structure, beam redirection, loss of interface gating, spurious noise from electrical sources, clad interface, straight beam back surface, mode conversion and geometric reflectors.
8.3 Valid indications meeting the criteria of paragraphs 8.1 and 8.2 shall be investigated by the examiner in terms of the rec.ording requirements-in paragraph 9.0.
O "E
EEE October 5, 1982 ,,G, U c, M oA E '
W NSID EN167M/46M830330 "'El'"154Rev.1 8.4 Other transducers, search units, frequencies, techniques, etc., may be used to aid interpretation and investigation.
~ 9.0 RECORDING REQUIREMENTS 9.1 All indications shall be identified as valid'or non-valid on the data printout. Valid indications having amplitudes which qual or exceed the appropriate interpretation and investigation level within the OD and ID boundaries of the area being examined shall be recorded per the additional requirements of Paragraph 9.4. Valid indications having amplitudes less than the appropriate interpretation and investigation level need only have peak amplitudes noted on the data printout.
9.2 The " Flaw Detect" data acquisition system provides the following information. ,
/K k 9.2.1 A digital readout defining the location of each of the nine axis of tool motion.
9.2.2 Identity of the inspection channel. .
9.2.3 The number of indications exceeding the primary reference level.
l l
9.2.4 A digital readout in microseconds of the transit time to the indication (s) referenced from the channel 0 interface position.
9.2.5 The indication amplitude (s) in percent of FSH.
9.3 For examinations of nozzle-to-shell welds from the nozzle bore, "A
scan data will be permanently recorded on videotape for review and interpretation in lieu of use of the " Flaw Detect" data acquisition ffEE October 5, 1982 58 74 lE E S
March 16, 1983
N1 /46M830331 **'h7'"154Rev.1 f
O) system. .The "A" scan recording system is diagrammed in Figure 9.
Operation of the system is described as follows:
4 9.3.1 Adjust the Sonic Mark VI delay and range controls such that the~ artificial interface marker, set at the transit time defined during system calibration, falls on the first major screen division (10*s of sweep length) and the end of -
the gate set, as a minimum, at the Tength defined during system calibration, falls on the ninth major screen division (90*; of sweep length)..
9.3.2 Calculate the Sonic Mark VI horizontal sweep calibration in usec/div at those sweep settings.
9.3.3 Establish an EBS pulse train to start at the sweep location. described for the artificial interface,and end at the sweep location described for the end of the gate.
, u 9.3.4 Calibrate the sweep of the auxiliary "A" scan oscilloscope as follows. Adjust the sweep delay and range controls of the auxiliary "A" scan oscilloscope until the EBS signals described in 9.3.3 are at identical sweep locations as on the Sonic Mark VI. After this adjustment is made, tape down the horizontal fine adjustment knob. The horizontal sweep calibration (usec/div) of the auxiliary "A" scan oscilloscope is then the same as that determined for the Sonic Mark VI in paragraph 9.3.2.
9.3.5 Calibrate the vertical scale of the auxiliary "A" scan oscilloscope as follows. Adjust the EBS attenuation controls to obtain a 100*; full screen height response for one EBS pulse on the Sonic Mark VI. View this same EBS pulse on the auxiliary "A" scan oscilloscope and adjust the vertical scale such that the amplitude is also 100's of se fdEE Oc.tober 5, 1982 59 g,
74 "fg o March 16, 1983
NAf
~~ NSID N167M/46M830331 ""*'$$7'"154Rev.1 7
(_) full screen height. After this adjustment is made, tape down the vertical fine adjustment knob.
9.3.6 Check the vertical linearity of the "A" scan oscilloscope per paragraph 5.2.
9.3.7 Field calibration checks with the EBS shall be. recorded at the beginning and end of each nozzle' examination.
- 9. 3. 8- The following information, as a minimum, shall be prominently displayed on the recording.
9.3.8.1 Plant identification.
9.3.8.2 Nozzle identification.
(; 9.3.8.3 Transducer / channel identification.
4 3
9.3.8.4 Artificial interface transit time and sweep
' position on the auxiliary display.
9.3.8.5 Gate delay and length. Specify the gate end sweep position on the auxiliary display.
9.3.8.6 Sweep calibration in usec/div.
9.3.9 "A" scan, tool position, and timing information shall be permanently recorded for scans of nozzle-to-shell welds -
from the nozzle bores performed per paragraph 7.6.4.
~
9.4 The felicwing additional information shall be generated and recorded on an indication data sheet, Figure 10, for each recordable indication using the inspection tool under manual (jog) control.
( ,) o rior to recording indications with a particular transducer /
E CTNE o October 5, 1982 DT '
PAGE OF A
N167M/46M830331 ~ "[S"[2154 Rev. 1
'i nspection channel, calibration and instrument linearity shall be verified. The indication recording sequence is illus~trated in Figure 11.
9.4.1 Maximum indication amplitude in percent of the DAC' calibration curve, search unit location as defined by the nine axis of tool motion, and transit time from the water /.
steel interface to the indication.
9.4.2 Jog the search unit toward the reflector. Where a 20% DAC interpretation and investigation level is specified, record the search unit location as defined by the nine axes of tool motion and transit time from the water / steel interface to the indication for positions where the indication amplitude drops to 100% DAC, half-maximum amplitude (for indications with peak amplitudes' exceeding '
q 100?s DAC), 50% DAC, and 20!; DAC. Where a 50% DAC
! interpretation and investigation level is specified, this information shall be recorded for the 100% DAC, half-maximum amplitude (for indications with peak amplitudes exceeding 100!4 DAC), and 50!; DAC positions only.
9.4.3 Jog the search unit away from the reflector. Where a 20%
DAC interpretation and investigation level is specified, record the search unit location as defined by the nine axes of tool motion and transit time from the water / steel j
interface to the indication for positions where the l indication amplitude drops to 100!; DAC, half-maximum amolitude (for indications with peak amplitues exceeding 100ff DAC), 50?! DAC,and 20!; DAC. Where a 50?; DAC interpretation and investigation level is specified, this l information shall be recorded for the 1007s DAC, half-maximum amplitude (for in,dications with peak. amplitudes exceeding 100is DAC), and 50?; DAC positions only.
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, o Dctober 5, 1982 ,,G, M g, N "fg" o h6 M,
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4 N167M/46M830330 "'"I$$'-154Rev.1 9.4.4 Jog the search unit back to the area of maximum anplitude and peak the indication. Where a 20% DAC interpretation and investigation level is specified, the length of the -
reflector shall be determined by scanning along the reflector's major dimension and recording search unit locations as defined by the nine axes of tool motion where the indication amplitude drops to 100%, 50%, and'20% of the OAC curve. Where a 50% OAC inte~rpretation and investigation level is specified, this information shall be recorded for the 100% and 50% DAC positions only.
9.5 Disassembly of the inspection tool shall not commence until all recordable indications have been evaluated by WNSID.
10.0 EXAMINATION RECORDS A The following information shall be provid,ed to document the examinations.
k[
10.1 The test procedure 10.2 Description of the test system 10.3 Calibration records 10.4 Identification and location of extent of areas examined 10.5 Record of all indications recorded n ,
10.6 Record of all evaluations of indications 10.7 Personnel certifications . .
E E SE E
October 5, 1982 62 c, 74 "I[E o March 16, 1983
W NSID
~
.t4167M/46M830331 **'37'"154Rev.;
Q'. 10.8 Dates and times of ex'aminations 10.9 Basic calibration block identification 10.10 Couplant 10.11 Surface condition and surfaces from which e'xaminations were performed.
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WESTINGHOUSE NUCLEAR SERVICE INTEGRATION DIVISION TRANSDUCER RF WAVEFORM DATA SHEET UTILITY PLANT O RE-INS,ECTIoM roST INSPECTIDN TRANSDUCERINFORMATION --
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