ML20080K713
| ML20080K713 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 05/19/1983 |
| From: | NUCLEAR ENERGY SERVICES, INC. |
| To: | |
| Shared Package | |
| ML20080K631 | List: |
| References | |
| 80A0467, 80A467, NUDOCS 8309290358 | |
| Download: ML20080K713 (26) | |
Text
,_
1 PROCEDURE NO. 80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 1
0F 26 o,
ULTRASONIC EXAMINATION PROCEDURES FOR CLOSURE HEAD AND FLANGE WELDS LONG ISLAND LIGHTING COMPANY SHOREHAM NUCLEAR POWER STATION UNIT l Prep'd by M
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Date C0HROLLED COPY l
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T NES
~7 Project Mgr.
r.
Date NES REV. NO.
DATE Mgr. ISI Level 111 Da te 1
0 8/4/77 NES
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b2 7-7 2
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ISI Pr M '. Level lli Date h
f}ograg
y_p3 7j 1
10/14/77 2
12/20/77 QA Mgr. [
Date 3
7/20/78 LILCO M. X. I*
- "!' 7 !' 7 bate 4
10/30/78 A
p 5
5/19/83 Date Copy No.
Assigned to;3
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NUCLEAR ENERGY SERVICES. ItiC.
8309290358 830915 DR ADOCK 05000 4
l PROCEDURE NO. 80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 2
0F 26 (continued on 2A)
RECORD OF REVISIONS Rev.
Prep'd No.
Date Description Reason by App'd by 1
10-15 p.1
- Add " Level lil" LILCO comments of' 10-14-77 NES LILCO Delete "St.W" HARTFORD comments of 10-10-77 W
l.2.2:
Delete "and/or g
r:'M[r
'#h7/'?
scan fixtures" 2.1 (6) : Delete entirely.
5.2.8:
Re-number as 5.2.5 t
5.2.8: "All examination weld / areas... so recorded" 5.4.2:
Delete entirely.
5.4.1:
Delete "5.4.1" 5.6.2: Change 1/64" to 1/32".
5.6.3: Delete entirely.
Re-number 5.6.4, 5 and 6.
6.1(1); Add "In compliance with Ref. 2. l(1)"
- 6. l (7) : Add " Thermometer" 6.2:
Delete (6),(7),
Re-number (8) (9)
(10) 8.1 (1) : Change "divisiens" to " positions"
- 8. l (2) : Spell out "FSH"
- 8. 3 (1) : Change " divisions" to " positions"
' O 11.1:
Add "The data sheets..... Code o
[ NUCLEAR ENERGY SERVICES. INC.
inspector."
7 PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 2A 0F 26 AV Rev.
Prep'd No.
Date Description Reason by' App'd by i
10-15 11.3.1: Delete reference LILCO comments of 10-14-77 NES LILCO to"S&W ESDCR HARTFORD comments of 10-10-77 A5210.4D" A) c 11.3.2: Change "S&W" to "LILC0" p.22, 23, 24: Add sign.
line for
" reviewer" 2
12-77 Pg. 22: delete"T/8" N
y 3 3
7-78 2.1 Clarify Code Useage LILCO and NRC comments 8.3 Change to " Full Vee" yp M5 4pps Figures-Change to " Full Vee"
.q/ @ty 4
10-73 8.3(1) Change to incorporate To meet Full Vee examination re-
- . f.
l' Full Vee Calibration.
quirements.
- /".U 3.3(2) Changed para. to read
" response from the 3/4T hole."
Revised procedure to reflect use of full Vee examination as well as 1/2 Vee exam-ination. (Section 8.3 and 3.4) 5 5-83 5.3.1 change to certify LILCO corments f
f that couplant not exceed g.ff-fj PPM halogens and 200 PPM sulfur.
See CRA 3324
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p NUCLEAR ENERGY SERVICES, INC.
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7-PROCEDURE NO. 80A0467
SUBJECT:
CLOSURE HEAD WELDS
(}
PAGE 3
0F
?6 ULTRASONIC EXAMINATION PROCEDURES FOR CLOSURE HEAD MERIDIONAL, CIRCUMFERENTI AL DOME AND FLANGE WELDS 1.0 SCOPE 1.1 Area of Examination This document covers the ultrasonic examination procedures for the Closure Head:
(1) Meridional welds.
(2) Circumferential dome weld.
1.2 Type of Examination
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1.2.1 Volumetric examination shall be performed using ultrasonic pulse echo nominal 45 angle beam shear wave and 0 straight beam techniques applied to the outside surfaces of the Closure Head.
1.2.2 The examination shall be performed manually using c,ontact search units (t ransduce rs),
di 1.3 Time of Examination These procedures shall govern the preservice examination and re-exanination__of repaired areas of the Closure Head as_ required by the ASME Boiler and Pressure Ltssel Code,Section XI.-
1.4 Weld Configuration 1.4.1 The Closure Head meridional, circumferential dome,and flange welds have a nominal thickness of 4-1/16".
(Minimum thick-ness of 3-3/16").
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1.4.2 Typical Closure Head weld configurations and nominal weld j
thicknesses are shown in Figures 1 and 2.
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NUCLEAR ENERGY SERVICES, INC.
s
PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 4
0F 2r, 1.5 Materials The Closure Head is constructed of low carbon steel.
2.0 REFERENCES
2.1 Reference Documents The following documents form a part of this examination procedure:
(1) ASME Boiler and Pressure Vessel Code,Section XI, b
191 Edition and the Summer of 1972 Addenda for examination coverage.
(2) ASME Boiler and Pressure Vessel Code, Section lil, 1971 Eoltion and the Sammer of 1972 Addenda.
(3) ASNT Recommended Practice, SNT-TC-1A, Supplement C, Third Edition (1971).
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(4) ConAm Procedure for Certifying Inspection Personnel, CUTP-1, Rev. 4, September. 1975 (5)
ConAm Procedure for Ultrasonic Instrument Linearity Verification, 25-PS-002, Rev. 2, November 1975 (6) ASME Boiler and Pressure Vessel Code,Section XI, A
1974 Edition for technique.
g 2.2 Applicable Drawings The following drawings are part of this procedure:
(1) CE Assembly Dwg. E-234-485 2.3 Operational Manuals The equipment operational manuals for the particular ultrasonic instruments used form a part of this procedure.
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NUCLEAR ENERGY SERVICES, INC.
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1 PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 5
0F 1 J
3.0 PROCEDURE CERTIFICATION The examination procedures described in this document comply with Section XI of the ASME Boiler and Pressure Vessel Code, 1971 Edition including Summer 1972 Addenda, except where examination coverage is limited by part geometry or access.
4.0 PERSONNEL CERTIFICATION 4.1 Personnel Certification Requirements 4.1.1 Each person performing ultrasonic examination governed by this procedure shall be certified in accordance with the References 2.1 (1), 2.1 (3), and 2.1 (4).
4.1.2 An examination crew shall consist of one or two members as needed. At least one member of each crew shall have a minimum qualification of Level 11 in accordance with the above referenced documents. The remaining member shall have a minimum qualification of Level 1.
O 62 eerse##ei a c re-4.2.1 Records of personnel qualification shall be. maintained by Examination Contractor.
4.2.2 A copy of the examiner's certification summary and a current eye test as required by SHT-TC-1A shall be filed with each permanent examination record, with a copy submitted to the plant owner or his agent, prior to performing examination per this procedure.
5.0 EXAMINATION REQUIREMENTS 5.1 Examination Frequency 5.1.1 The nominal examination frequency shall be 2.25 MHz for all straight beam and angle beam examinations.
5.1.2 During preservice examination, other pulse frequencies shall be used only if such variables as material attenu-ation, grain structure, etc., necessitate their use to achieve penetratFon or resolution. This information shall be recordec on the data sheets.
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PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 6 0F L q
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52 Examination Angles and Coverage 5.2.1 The intent of this procedure is to provide maximum examina-tion coverage to ensure weld integrity.
Each weld shall be scanned with minimum 25% overlap of the transducer width (diameter) for each scan pass.
5.2.2 The rate of search unit movement shall not exceed six (6)
Inches per second.
5.2.3 Each weld and the required volume (WRV) of metal for one-half (i) wall thickness (T) on each side of the weld shall be ultrasonically examined using 45 shear wave angle beam techniques applied in two directions perpendicular to the weld axis and in two directions parallel with the weld axis, on both sides of the weld, except where restricted by part geometry or access.
5.2.4 Straight beam techniques shall be applied, where part geometry permits, to a11 parent material through which the angle beams will pass during angle beam examinations.
In-f-
dications detected are to be recorded in accordance with Scction 10.1.1 of this procedure.
5.2.5 in addition, straight beam techniques shall be appIled to the weld and required volume where part geometry permits.
Indications shall be recorded in accordance with Section 10.1.2 of this procedure.
5.2.6 Other angles may be used if required for aid in evaluation of reflectors or to accommodate geometric restrictions and limited access. All Information shall be recorded on the data sheets.
5.2.7 Uhere examination surface, geometry.or other conditions (weld, contour, access, etc.) do not permit a meaningful ultrasonic examination to be performed, the examiner shall record the area of non-examination and the particular in-terfering condition in the space provided on the Calibration Data Sheet.
In addition, he shall make a sketch of the weld and adjacent conditions on the reverse side of the calibration data sheet (Figure 5).
5.2.8 Allexaminationweld/areasshallbeenteredinthespacehrovided
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on the Calibration Data Sheet.
If there are no recordable indica-A tions, it'shall be so recorded.
5.2.9 Coverage for the welds specified in Table 1 is shown in Figures I and 2.
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f PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 7
0F L a
5.3 Liquid Couplant 5.3.1 The ultrasonic couplant shall be suitable for use on nuclear plant material and certified not to exceed 50 PPM halogens 51 and 200 PPM sulfur.
l 5.3.2 The couplant shall be supplied in clean containers of suf-ficient quantity to perform the examination.
5.3.3 The couplant shall be applied manually with a brush or other suitable device.
5.3.4 Where required, the examiner shall be responsible for removing couplant from the examination surface at the conclusion of the examination.
5.4 Surface Preparation All examination surfaces should be clean and free of dirt,
!Ai weld spatter, etc., or any other condition which would interfere with the examination by impairing proper trans-fg mission of the sound beam, or by preventing free movement
(_)
of the search unit along the examination surface.
A 5.5 Weld identification Each weld shall be located and identified per the appropriate weld map located in the Program Plan Book.
5.6 Datum Point 5.6.1 The examiner shall verify that there has been marked, a reference datum point on each weld from which all examina-tion data and reported indications shall be referenced.
5.6.2 Datum points shall be marked by the use of low stress stamps or vibratooling and shall not be deeper than 1/32".
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NUCLEAR ENERGY SERWCES.NC
PROCEDURE NO.
80A0467
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SUBJECT:
CLOSURE HEAD WELDS FAGE 8 0F 1 1
5.6.3 Circumferential dome head welds and closure head to flange weld datum points shall be located on the weld centerline at vessel 0.
A 5.6. 4 Meridional weld datum points shall be -located on the weld centerline at the bottom end of each weld.
5.6. 5 Each weld datum point along with respective weld reference points and divisions shall be shown on each examination report.
6.0 EQUIPMENT REQUIREMENTS 6.1 Examination Contractor's Equipment The following test equipment or its equivalent shall be provided by the Examination Contractor (as a minimum) for examination of the Closure Head welds:
(1) Pulse Echo Ultrasonic Instrument. (in compliance with Ref. 2.l(l)) 8 O
(2) Wedge, 45, Refracted Shear Wave.
(3)
Search Uni ts,1/2", 3/4", or 1" Dia., 2.25 MHz, 0.
0 (4) Search Units, 1/2" x 1", 2.25 MHz.
(5) Couplant.
(6) Camera, (7) Thermometer.
A 6.2 Plant Owner's Equipment The Plant Owner or his Agent shall provide the following service facilities and equipment as required:
(1) Scaffolding.
(2) Water, Air,and Electricity.
(3) Temporary Lighting.
(4) Crane or Lifting Devices.
(5) Calibration Standard No. SNPS-4.
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r PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS N
PAGE 9
0F pg (d
A (6) Test Surface Preparation.(cleaning and finishing)
(7) Drawings of Each Examination Area.
(8) Post-Examination Cleanup of Test Area.
7.0 CAllBRATION REQUIREMENTS 7.1 Calibration Data Sheets Calibration Data Sheets shall be numbered 467-1, 467-2, 467-3, etc., at the time of calibration and shall be signed by the examiner (s) upon completion.
Figure 5 is an example of the Calibration Data Sheet to be used with this procedure.
7.2 Calibration Standards m
7.2.1 The calibration standard designated in Section 6.2 (5) shall be used for basic instrument calibration and for establishing reference sensitivity levels for examination of the specified welds. (See Figure 3).
7.2.2 The identity of the calibration standard used for performing calibration shall be recorded on each Calibration Data Sheet.
7.2.3 Calibration procedures for the examination shall be performed using the O D surface of the referenced standard.
7.2.4 The temperature of the calibration standard shall be wi thin 25 F of the component temperature. Calibration standard and component temperatures shall be recorded on the Calibra-tion Data Sheet.
7.3 Reference Sensitivity Level 7.3.1 The reference sensitivity level shall be the distance-amplitude curve initially obtained directly from the cali-bration standard and shall be the sensitivity level used for evaluating and recording all indications.
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7.3.2 During actual weld scanning, the reference sensitivty level shall be increased a minimum of 2X (6dB).
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PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 10 0F 1 7.4 Times of Calibration 7.4.1 Basic Instrument calibration shall be performed using the appropriate calibration standard, search units,and instrument-ation immediately prior to the examinatien of the Closure Head.
7.4.2 instrument vertical linearity checks shall be performed at the beginning of each day of examination in accordance with the procedure referenced in Section 2.1 (5), using an angle beam search unit applied to the code of ca11bration standard.
7.4.3 Examination system calibration checks shall be performed at least at the beginning and at the completion of each four (4) hour period of examination and/or at the change of examination personnel, equipment, search units, coupler shoes, etc., and at the completion of the examination of each similar series of welds in accordance with Sections 8.2 and 8.5 of this procedure.
7.5 Calibration Response O
751 Calibration response shall be checked at the primary reference sensitivity level.
7.5.2 Signal response obtained during calibration check shall be within plus or minus 20% of that established during basic system calibration.
7.5.3 If any point on the DAC curve has decreased by more than 20% of its amplitude, the examiner shall:
(1) Mark all weld data sheets void since previous calibration.
(2) Recalibrate examination system.
(3) Re-examine volded areas.
7 5.4 If any point on the DAC curve has increased by more than 20% of its amplitude, the examiner shall:
(1) Recalibrate examination system.
(2) Re-evaluate all indications recorded since the previous calibration at the corrected sensitivity level.
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PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 11 0F 26 7.5.5 If any point on the DAC curve has moved horizontally more than 5% of the sweep line from its original settings, the examiner shallt (1) Correct the sweep calibration and note it on the Calibration Data Sheet.
(2) Void any data sheets made since the previous call-bration which have recorded indications and re-examine those areas.
8.0 EXAMINATION SYSTEM CALIBRATION 8.1 Straight Beam Calibration Straiglet beam sweep calibration and distance-amplitude correction shall be performed as follows and as shown in Figure 4:
(1) Adjust the instrument sweep controls so that the signal responses from the 1/4T and 3/4T holes occur at tSe second (2nd) and sixth (6th) horizontal screen positions.
(2)
Position search unit to obtain maximum response from the hole which gives the highest amplitude signal.
Adjust sentitivity control to provide a signal amplitude of 80% of Full Screen Height (FSH) and mark location and amplitude on the CRT.
(3) Without changing sensitivity, position the search unit respectively on the remaining holes and mark signal amplitudes and locations on the CRT.
t (4) Plot a DAC curve by connecting the locations (marked on the CRT) wi th a continuous line extended to cover the full examination range as shown in Figure 4.
(5) This is the primary reference sensitivity.
Record all sensitivity control settings on the appropriate Calibration Data Sheet.
8.2 Straight Beam Calibration Check Straight beam calibration check as required by Section 7.4.3 shall be performed as follows:
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Procedure No.
30A0467
Subject:
CLOSURE HEAD WELDS (3
Page 12 of 26 m)
(1)
Adjust the sensitivity control settings to those recorded for the calibrated reference sensitivity. See Section 3.2(2).
(2)
Resposition search unit at each respective test Hole and observe muximum signal response amplitudes, and horizontal screen positions.
(3)
See Section 7.5 for signal response requirements during calibration c' heck.
3.3 Angle Beam Calibrati_on (Second Half of Vee Path)
Angle beam sweep calibration and Distance-Amplitude Correction should be performed as follows and as shown in Figure 4:
(1)
Adjust the instrument sweep controh so that the signal response g
from the 1/4 T and 13/4T holes occur at the first (1st) and seventh (7th) horizontal screen positions as shown in Figure
- 4. To verify sweep calibration, ensure that response from square notches appear near the fourth (4th) aad eighth (3th) d d
horizontal oositions respectively.
(2)
Position search unit to obtain r6aximum response from the 3/4T hole. Adjust sensitivity control'to provide a signal ampli-d p
tude of 80% of FSH and mark location and amplitude on CRT.
U (3)
Without changing sensitivity, position search unit respectively on the remaining angle beam calibration holes and mark signal amplitudes and locations on CRT.
(4)
Position search unit for mr.ximum response from the far surface notch and "X" mark the screen and data sheet to indicate amplitudes.
(5)
If the instrument is equipped with an electronic Distance-Amplitude Correctiondevice, the primary releence response shall be equalized at 80% of FSH over the distance range
-to be employec'in the examination.
(6)
Plot a Dittance-Amplitude Correction (DAC) curve by connecting
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the locations (marked on the CRT) with a continuous line extended to cover the full examination range as shown in Figure 4.
O NUCLEAR ENERGY SERVICES. INC.
Procedure No.
80A0467
Subject:
CLOSURE HEAD WELDS p'
Page 13 of 26 v
(7)
This is the primary reference sensitivity. Record all sen-sitivity control settings on the appropriate Calibration Data Sheet.
(8)
Report all data and instrument settings on the Calibration Data Sheets.
8.4 Angle Beam Calibration (First Half of Vee Path)
Angle beam sweep calibration and distance-amplitude correction should g
be performed as follows and as shown in Figure 4:
(1)
Adjust the instrument sweep controls so that the signal re-sponse from the 1/4T and 3/4T holes occur at the first (1st) and third (3rd) horizontal screen positions as shown in Figure
- 4. To verify sweep calibration, ensure that response from square notch appears near the fourth (4th) horizontal positions.
(2)
Position search unit to obtain maximum response from the hole which gives the highest amplitude signal. Adjust sensitivity control to provide a signal amplitude of 80% of FSH and mark location and amplitude on CRT.
(3)
Without changing sensitivity, position search unit respectively on the remaining angle beam calibration holes and mark signal amplitudes and locations on CRT.
(4)
Position search unit for maximum response from the far surface notch and "X" mark the screen and data sheet to indicate amplitude.
(5)
If the instrument is equipped with an electronic distance-amplitude correction device, the primary reference response shall be equalized at 30% of FSH over the distance range to be employed in the examination.
(6)
Plot a Distance-Amplitude Con.ccion (DAC) curve by connecting the locations (marked on tN Oft I with a continuous line extended to cover the ' W - xc ation range as shown in Figure 4.
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NUCLEAR ENERGY SERVICES, INC.
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Procedure No.
80A0467
Subject:
ci nstIRF HEAD WFI n9 Page in of 26 (7)
Tha is the primary reference sensitivity. Record all sen-sitivity control settings on the appropriate Calibration Data Sheet.
(8)
Report all data and lastrument settings on the Calibration Data Sheets.
8.5 Angle Beam Calibration Check Angle beam calibration check as required by Section 7.4.3 shall be per-formed as follows:
(1)
Adjust the sensitivity control settings to those recorded for the calibrated reference sensitivity. See Section 8.3 (2).
(2)
Reposition search unit at c,ch respective test hole and observe signal response amplitudes and Sorizontal screen positions.
(3)
See Section 7.5 for signal response requirements during cal-ibration check.
9.0 EXAMINATION PROCEDURES C
9.1 Examination of Base Material for Lamination 9.1.1 Straight beam examinations to detect laminar reflectors which might affect the interpretation of angle beam results shall be performed at a sensitivity level giving an initial back reflection signal amplitude of 80% FSH.
9.1.2 A rectilinear scan pattern shall be used.
9.1.3 For the location and the numbers of the welds refer to the Program Plan. Examination shall not be considered complete until all recordable indications have been evaluated.
9.2 Straight and Angle Beam Examination of WRV 9.2.1 Straight and angle beam examination of weld and required volume shall be performed at a scanning sensitivity level at least 2X (6dB) greater than the calibrated reference sensitivity level.
i OG NUCLEAR ENERGY SERVICES, INC.
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l
PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS i
PAGE 13 0F 2(,
b 9 2.2 For all examinations,a rectilinear scan pattern shall be used.
9 2.3 For angle beam examinations,the search unit shall be swivelled to ensure maximum coverage as it is moved I
i along a rectilinear scan pattern.
9.2.4 For the location and the numbers of the welds, refer to the Program Plan. Examination shall not be considered complete until all recordable indications have been evaluated.
10.0 EVALUATION CRITERIA 10.1 Recording of Indications 10.1.1 For straight beam examinations of base metal for lamin-ations, all areas giving indications equal to or greater l
than the remaining back reflection shall be recorded on the appropriate data sheet prior to angle beam examination of the weld and the required volume.
t (1) Each recorded area shall be identified as to distance from surface, length and position relative to the weld datum point.
1 (2) Recorded data shall be taken on each parallel scan pass at increments not to exceed that permitted by the 25% overlap of transducer element diameter (width).
10.1.2 For examinations of the WRV, all Indications showing a signal amplitude response equal to or greater than 50%
4 of the reference response shall be recorded on the appropriate data sheet at the time of weld examination.
Planar indications at or near the far surface shall be compared directly with the amplitude obtained from the notch.
(1) Each recorded indication shall be identified as to depth ( as a percent of thickness), distance from surface, length, signal amplitude,and location relative to the weld datum point.
O J _ _ __
PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 16 0F _26 I
4 V)
(2) Recorded data shall be taken on each parallel scan pass at increments not to exceed that per-mitted by the 25% overlap of transducer element i
diameter (width).
(3) The end points of recorded indications shall be determined by 50% DAC amplitude points.
10.1.3 Indications from all meridional welds shall be recorded in inches above the weld datum point and in inches i
clockwise (CW) or counter-clockwise (CCW) from the weld centerline when looking down upon the top of the closure head.
10.1.4 Indications from all circumferential dome and flange welds shall be recorded in inches above or below the weld centerline and in inches CW or CCW from the weld datum point when looking down upon the top of the closure head.
10.2 Evaluation of Indications 10.2.1 Evaluation of all indications shall be made at the reference sensitivity and in accordance with the require-ments of the ASME Boller and Pressure Vessel Code,Section XI, IS-300. All evaluations shall be performed by a Level 11 or Level Ill.
10.2.2 Results of this evaluation shall be reported to the Plant Owner or his Agent in accordance with the requirements of the ASME Boiler and Pressure Vessel Code,Section XI,15-600. Disposition of evaluation results shall be made in accordance with the Owner's Plant Procedures.
11.0 EXAMINATION RECORDS 11.1 Certification of Records
~
_The examiner sha11 complete and sign _all data sheets immediately upon the completion of each weld examina To_n. The~ data shebts may__
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be reviewed by the authorized Code inspector.
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PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 17 0F 2(,
11.2 Filing of Records The examiner shall be responsible for submitting to the Plant Owner or his Agent a completely documented set of examination records including certification of personnel l
qualifications with a current eye test report in accordance with SNT-TC-1A.
11.3 Procedure Corrections and Additions 11.3.1 All procedure corrections and/or additions required during the preservice examinations shall be made in accordance with requirements of NES QA Program Plan '# MES A
~~ 80A0448.
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11.3.2 The examiner will contact the LILCO represent-A ative on site to initiate all such changes. All changes shall be documented in the record of revisions section j
of this procedure.
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NUCLEAR ENERGY SERVCEE WeC.
PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE sg 0F os; O
13" i-
=
-13" g
g 21"
_ li'_1.
21" m
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.L 45
.i.45 0 WRV
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4-1/16" 00*
45 =7/
//
45 -
O WRV o
nomina 1 e
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O 3
LEGEND
.1 Perpendicular to Weld
= Parallel to Weld
- O Base Material
[ WRV Weld & Required Volume FIGURE 1 - ULTRASONIC EXAMINATION OF CLOSURE HEAD CIRCUMFERENTIAL AND MERIDIONAL DOME WELDS.
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PROCEDURE NO: 80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 19 0F J u.\\ l 'Y LEGEND o
- l. Perpendicular Scan
== Parallel Scan 45 L 13 g
- O Base Material
{ WRV Weld & Required Volume h'45o.
0 WRV 21" N
x s
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'x N t
in N
s x
,'s N
-s O
J~' 45 L
'N]
N Examine as far as
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45 =
geometry permits O WRV I
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FIGURE 2 - ULTRASONIC EXAMINATION OF CLOSURE HEAD FLANGE WELD.
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NUCLEAR ENERGY OERVICES, INC.
l
PROCEDURE NO.
80A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 1 0F y
nU Examination Surface
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O 4T T
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- iT 0
0
- 3/4T A
w c1 e
ll
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Calibration Holes (6)
Standard Block Hole Hole Notch No.
Thick.
hT iT 3/hr Dia.
Depth Depth SNPS-4 4-3/32" 1.02" 2.04" 3.06" 0.25" 3.00" 0.082" (2%T)
FIGURE 3 - ULTRASONIC CALIBRATION STANDARD SNPS-4 FOR CLOSURE HEAD WELDS o
NUCLEAR ENERGY SERVICES. INC.
Procedure No.
80A0467
Subject:
Closure Head Welds Page 21
_of 26 O
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N N N '<N xXp i
N 6
Ns s
s 4xxxo s
N '(X >M,,
Straight Beam Angle Beam Search Unit Positions Search Unit Positions Initial DAC Cur DAC Equalized Initial DAC C ve DAC Equaliz
~
[
Full Ve[.
)
. ' K --
1/2 Veek-
-- s q,.':
r, /s s'
's
's
'I
'N,\\
j
{N i
F.: ks
's, o\\
i
's (v]
f k
\\
f'
,h '. 'q$
ij-i s
i i.
i i
,E Ik,
\\
(b 2
4 6
$1 l'0)
(
2 3
4 S
6 7
3
'3 10 )
Step 1 - Adjust sweep controls so that indications from holes are located at the appropriate horizontal screen divisions.
Step 2 - Adjus,t sensitivity to provide 80% FSH indications using 1/4T or 3/4T hole,** mark position on screen.
Step 3 - Position search unit for maximum response from remaining holes ' mark position on screen.
Step 4 - Plot DAC by connecting points marked with line extended to cover entire examination range.
Step 5 - Use Distance-Amplitude Correction to electronically equalize amplitude respone at the specified reference level.
Step 6 - Record all sweep and sensitivity control settings on respective data sheets.
FIGURE 4. - REFERENCE SENSITIVITY AND DAC CALIBRATION PROCEDURES FOR ULTRASONIC EXAMINATION OF WELDS.
p/
- depending on transducer near field, either DAC shape can be expected
- use the 3/4T hole for full vee exam (see Section 8.3)use the 1/4T hole for 1/2 vee exam s_,
(see Section 8.4)
.4/ =,
NUCLEAR ENERGY SERVICES, INC.
22 of 26 Plant / Unit Data Sheet No.
Comp / System CALIBRATION DATA SHEET Procedure No.
Subject p.g (j
Rev/ Change No.
INSTRUMENT SETTINGS SEARCH UNIT Calibration Block No.
- 4fg/Model No.:
Scan Angle:
Mode:
Surface Serial No.
Fixturing (if any):
Block Temp
- F Comp. Temp
- F Sweep Length
- Style or Type No. :
DEPTH AMPL.
ATTEN.
oweep Delay -
Size & Shape :
Tnerr.
in.
s e
Pulse Length / Damping:
Frecaency Freq.:
Rep. Rate:
Serial No/ Brand:
Filter:
Video: Jack:
Measured Angle :
DEC/ Gate Switch:
Range:
Cable Type & Length:
dode Select:
Reject:
Couplant Brand:
Gain (coarse):
(fine):
Couplant Batch:
100g DAC PLOT INSTR. LINEARITY CAL.
1 l 2 3 l 4 l 5 90 I
Amplitude 80 70 High Low High Low f
60 SCAN AREA 50 1
5 0* WRV 40.
2 6
30
[-)
0* Mat'l I
I
'I 20 3
7 I
I go J.to Weld.
hip '.oi in,b.n n.-l,t n.. !n. ',,,innt 4
8 0 1 2 3 4 5 0 7 8 9 to AMPL. CONTROL LINEARITY Initial A dB Result RECORDABLE EXAMINATION INDICATION COMMENTS / REASON FOR 80
-6 WELD / AREA INCOMPLETED SCAN (S)
Yes No 80
-12 40
+6 20
+12 CALIBRATION CHECKS TIME Initial Cal.
Intermediate Intermediate Intermediate Final Cal.
b'4 ADDITIONAL SHEETS? (CHECK EOX)
EXA!!INERS 1 Date Level
'u.J Continuation!
Beam Plot 2
Date Level Supplements l None p 77g g
q'f P40CLE AR ENERGY SERVICES.INC.
j FIGURE 5 - CALIBRATION DATA SHEET E
l 23 of 26 8#""T ^
weld O(/
4 I
INDICATION REPORT SHEET l
UI STRAIGilT BEAM j
l Procedure No.
. -p-Datum O
Subject f
Weld No.
X A
Page of A
I Attached to Cal.
f Data Sheet No.
1 Notes:
W
~
Y (1) X-axis increments not to exceed f~
allowable scan increments.
b'? ri r. f D
[
(2) End points shall be :(a) 50% of DAC (6db) for WRV Straioht Beam exam, (b) equal to Remaining Back Re-y1 Election (RBR) for base material l
2" A
lamination exam.
I (3) This column for WRV Straight Beam Sectlan A-A exam only.
(4) This column for base material lam-ination exam only.
FORWAC.D BACK MAX (,)
(]
p)
(4)
Y G NAX (f)
(b)
INDI-(,
CATION SIDE OF D
X
% DAC RBR
% DAC MDFOT" ' "] POINT NO.
WELD (in T/8s)
( db)
% FSH
)
(gj d
l i
I COMMENTS EXAMINERS j
1.
Date Level O
[
't) r 2.
Date Level l
REVIEWER DATE A
l NUCLEAR ENERGY SERY:CES.WC.
i
24 of 26 hi SUPPLEMENT B V-Weld k
INDICATION REPORT SIIEET l
l
_L ANGLE BEAM l-T 1
Procedure No.
e
.-Datum 0 Subject I
Weld No.
X, A
A Page of o
.-. L Q- - - - -...
Attached to Cal.
1 i
Data Sheet No.
f py-
~
-l' l
J Notes:
e (1) X-axis increments not to exceed hn allowable scan increments
\\'
D {_,T _ [ __ y\\ \\
E D
D 1 2
{
(W A _'
(3) Data must be recorded from both
$_._ _____L
_ hr i
sides.
If indication cannot be HY17
(
found from the opposite side, so i
- Y2 ~
state.
Section A-A O
MAXIMUM INDICATION FORWARD (f)
BACK (b)
CALC.
DI-SIDE CATION OF(3)
X M
D G MAX Y@W UNM NC L
NO.
WELD (in)
?. DAC (T/8s)
(in) 7 y1 (in)
D Y? (in) in.
"T D
2 s
i f
COMMENTS EXAMINERS 1
Date Level (Oj 2
Date Level REVIEWER DATE A
e)
NUCLEAR ENERCY SEPVICES.l'ec.
25 of 26 SUPPLEMENT C m
Datum 0 t
i V
INDICATION REPORT SHEET
= ANGLE BEAM A
(1)
H X-l A
L-l 2
I 4
Procedure No.
.}
Subject
- g_
Weld No.
y Page of Weld Attached to Cal.
J
- U Data Sheet No.
q b
- -d Notes :
1 (1) Y-axis increments not to exceed b
f allowable scan increments g-Q QQ (2)
End points shall be 50% of DAC D 1
\\
\\ s 's 8
( 6db) s 211 ~ I' ~~ ~
[ ~ ~ ][ ~g _ _ _k_" " I D
(3) Data must be recorded from both g ~ ~ ~ - ~ ~s
(
sides.
If indication cannot be l -alX1 6) found from the opposite side, so a
state.
X F 2*
Section A-A (O
MAXIPIRI INDICATION FOREWARD (f)
BACK (b)
CALC.
,]
INDI-SIDE (1)
I CATION OF (3) y MAX 3 @ MAX X @ MAy ENDPOINT *I ENDPOIIC I2)
L NO.
WELD (in)
% DAC (T/8s)
(in)
D i X3_ (in)
D X
(in' in.
- .T 3
9 COMMENTS EXAMI1ERS 1.
Date Level O
2.
V Date Level REVIEWER DATE A
e
" NUCLEAR ENERGY SERVICES.INC.
PROCEDURE NO.
80_A0467
SUBJECT:
CLOSURE HEAD WELDS PAGE 26 0F 26 O
b TABLE 1 WELD IDENTIFICATION NUCLEAR COMPONENTS Weld No.
Description Reference Block Re fe rence Figures Notes 3-318 Closure Head Circumferential Veld SNPS-4 CE-E-234-485 (Figure 2) 1-318A Closure Head Meridional Weld 0
CE-E-234-485 (Figure 1) 1-3188 45 1-318C 90 1-318D 135 1-318E 180 1-318F 225 0
1-318G 270 1-318H 315 f
2-318 Closure Head to Y
Flange Weld CE-E-234-485 (Figure 3) o n
v NUCLEAR ENERGY SERVICES, INC.
LYj/
! L.!; : n e
STONE E. V!EOSTER ENGINEERING CORPORATION
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