ML20080K644

Rev 1 to Procedure 80A0471, Manual Ultrasonic Exam Procedures for Vessel Welds & Stabilizer Bracket Welds

ML20080K644
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	05/20/1983
From:	NUCLEAR ENERGY SERVICES, INC.
To:
Shared Package
ML20080K631	List: ML20080K628 ML20080K644 ML20080K655 ML20080K665 ML20080K713 ML20080K731 ML20080K735 ML20080K742
References
80A0471, 80A471, NUDOCS 8309290313
Download: ML20080K644 (31)

Text

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e PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 1 0F 31

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS g PAGE 2 0F _31 RECORD OF REVISIONS Rev. Prep'd No. Date Description Reason by App'd by NES LILCO 1 5/20/ 5.3.1 Change to read, Incorporate Field Changes g }q 83 ... be certified not to 1,2,and 3 (( j yj g 5 exceed 50 PPM halogens and 200 PPM sulfur.

Table I add RPV bottom head meridional welds.

Add Figure 1A Add Paragraph 1.1(5) RPV bottom head meridional welds (1-306 A,3,C,D,E,F and H).

Paragraph 6.2 add cal-ibration standard No.

SNPS 7 1/4 as item 7.

Figure 5 change the block thickness for standard No ,

SNPS 6 to read 6 5/32.

Figure 5 add standard No. SNPS 7 1/4.

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l PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 3 0F 31 1 N-]s l MANUAL ULTRASONIC EXAMINATION PROCEDURES FOR VESSEL WELDS AND STABILIZER BRACKET WELDS 1.0 SCOPE 1.1 Area of Examination This document covers the manual ultrasonic examination procedures for the following Reactor Pressure Vessel (RPV) welds.

(1) RPV Upper Shell Course Vertical Welds (1-308A, B, and C), above top of shield wall (EL. 618").

(2) RPV Lower Shell Course to Upper Torus Weld (6-307).

(3) RPV Upper Torus to Lower Torus Weld (4-306).

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(4) Stabilizer Bracket (4) to RPV Welds (4-324). A (5) RPV bottom head meridiunal welds (1-306A,B,C D,E,F and H). Ql 1.2 Type of Examinat i on 1.2.1 Volumetric examination shall be performed using ultrasonic pulse echo nominal 45 angle beam shear wave and 00 straight beam techniques applied to the outside surfaces of the RPV welds and 00 straight beam applied to the front surface of the Brackets.

1.2.2 The examination shall be performed manually using contact search units (transducers).

1.3 Time of Examination These procedures shall govern the preservice examination and re-examination of repaired areas of the RPV as required by the ASME Boiler and Pressure Vessel Code,Section XI.

1.4 Weld Configuration 1.4.1 The RPV Upper Shell Course Vertical Welds have a nominal thick-ness of 5-7/8" (minimum thickness 5-3/8").

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PROCEDURE NO. 80A0471~

SUBJECT:

MANUAL RPV WELDS  ;

^s PAGE 4 0F J (Q i 1.4.2 The RPV Lower Shell Course to Upper Torus Weld RPV, Bottom Head meridional welds, and the RPV Upper Torus to Lower Torus Weld have a nominal thickness of 4-1/16" (minimum thickness of 3-3/16") .

1.4.3 The RPV welds and Stabilizer Bracket weld configurations are shown in Figures 1 through 5.

1.5 Materials The RPV shells and stabilizer brackets are constructed of low carbon steel. The RPV is cladded with 5/16" stainless steel t adding on the ID surfaces.

2.0 REFERENCES

2.1 Reference Documents The following documents form a part of this examination procedure:

(1) A'3ME Boiler and Pressure Vessel Code,Section XI, 1971 Edition and the Summer of 1972 Addenda.

(2) ASME Boiler and Pressure Vessel Code, Section Ill, O' 1971 Edition and the Summer of 1972 Addenda.

(3) ASNT Recommended Practice, SNT-TC-1A, Supplement C, Third Edition (1971).

(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.

2.2 Applicable Drawings The following drawings are part of this procedure:

(1) CE Assembly Dwg. E-234-235 (2) CE Assembly Dwg. E-234-237 (3) CE Assembly Dwg. E-234-473 (4) CE Assembly Dwg. E-234-480 n

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SUBJECT:

MANUAL RPV WELDS

. PAGE 5 0F 31 i

2.3 Operational Manuals The equipment operational manuals for the particular ultrasonic instruments used form a part of this procedure.

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4 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.i 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 ll In accordance with the O- above referenced documents. The remaining member shall have

a minimum qualification of Level I.

4.2 Personnel Records 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 SNT-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 attenuation, grain structure, etc., necessitate their use to achieve penetration or reselution. This information shall be recorded on the

data sheets.

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 6 0F 31 ~

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5.2 Examination Angles and Coverage 5.2.1 The intent of this procedure is to provide maximum examination 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 Straight beam techniques shall be applied to the weld and required volume where part geometry permits. Indications shall be recorded in accordance with Section 10.1.2 of this procedure.

5.2.4 in addition, straight beam techniques shall be applied, where part geometry permits, to all parent material through which the angle beams will pass during angle beam examinations. Indica-tions detected are to be recorded in accordance with Section 10.1.1 of this procedure. (Not for Stabilizer Bracket Welds.)

5.2.5 Each weld and the required volume (WRV) of metal for one-half wall thickness (1/2T) on each side of the RPV welds shall be ultrasonically examined using 45 shear wave angle beam techniques applied in two directions perpendicular to the weld

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T axis and in two directiont parallel with the weld axis , on both sides of the weld, except where restricted by part geometry or access. (Not for Stabilizer Bracket Welds.)

5.2.6 Other angles may be used if required for aid in evaluation of reflectors or to accomodate geometric restrictions and limited access. All information shall be recorded on the data sheets.

5.2.7 Where 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 interfering condicion 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 9).

5.2.8 All examination welds shall be entered in the space provided on the Calibration Data Sheet. If there are no recordable indications, it shall be so recorded.

5.2.9 Coverage for the welds specified in Table 1 is shown in Figures 1 through 4.

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS m PAGE 7 0F 31__

53 Liquid Couplant 5 3.1 The ultrasonic couplant shall be suitable for use on nuclear plant material and be certified not to exceed 50 PPM halogens and 200 PDM sulfur.

5.3.2 The couplant shall be supplied in clean containers of suf-ficient quantity to perform the examination.

533 The couplant shall be applied manually with a brush or other suitable device.

5.3.4 Where reoutred, 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, weld spatter, etc., or any other condition which would interfere with the examination by impairing proper transmission of the sound beam, or by preventing free movement of the search unit along the examination t surface.

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, & reference datum point on each weld from which all examination 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 net be deeper than 1/32".

5.6.3 The RPV vertical weld datum point shall be at the highest point visible on the weld centerline.

5.6.4 The RPV circumferential weld datum point shall be at 0 orientation of the vessel at the weld centerline.

5.6.5 The datum point for the stabilizer bracket weld shall be the I center point of the frontal surface. i 5.6.6 Each weld datum point along with respective weld reference points e and divisions shall be shown on examination report.

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PROCEDURE NO. 80A0471

SUBJECT:

MANilAL RPV WELDS s PAGE 8 0F J1 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 RPV welds:

(1) Pulse Echo Ultrasonic Instrument (in compliance with Ref. 2.1 (1)).

(2) Wedge, 45 , Refracted Shear Wave.

(3) Search Units, 1/2", 3/4", or 1" Dia., 2.25 MHz, 0 .

(4) Search Units, 1/2" x 1", 2.25 MHz (5) Couplant (6) Camera (7) Thermometer 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 (6) Calibration Standard No. SNPS-6 (7) Calibration Standard No. SNPS - 7 1/4 b (8) Calibration Standard No. FL/LIG (9) Test Surface Preparation (cleaning and finishing)

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(10) Drawings of Each Examination Area (11) Post-Examination Cleanup of Test Area O

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!l PROCEDURE NO. 80A0471

$UBJECT: MANUAL RPV WELDS PAGE 9 0F li ,

7.0 CAllBRATION REQUIREMENTS 7.1 Calibration Data Sheets, Calibration Data Sheets shall be numbered 471-1, 471-2, 471-3, etc.,

at the time of calibration and shall be signed by the examiner (s) upon completion. Figure 9 is an example of the Calibration Data Sheet to be used with this procedure.

7.2 Calibration Standards 7.2.1 The calibration standard designated in Section 6.2.1 (5), (6),

and (7) shall be used for basic Instrument calibration and for establishing reference sensitivity levels for examination of the specified welds. (See Figures'5 and 6) 7.2.2 The identity of the calibration standard used for performing callbration shall be recorded on each Callbration Data Sheet'.

7 2.3 Calibration procedures for the examination shall be perfcrmed using the 0.D. surface of SNPS-4 and SNPS-6 and the top unciadded surface of FL/LIG.

() 7.2.4 The temperature of the calibration standard shall be within 250F of the component temperature. Calibration standard and component temperatures shall be recorded on the Calibration 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 evaluatir.g and recording all Indications.

7.3.2 During actual weld scanning, the reference sensitivity level shall be increased a minimum of 2X (6dB).

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 examination of the RPV welds.

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 10 0F _ 31 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 Calibration 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 exanination 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 8.3 and 8.5 of this procedure.

7.5 Calibration Response 7 5.1 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.

't (2) Recalibrate examination system.

(3) Re ,xamine voided areas.

7 5.4 If any point on the DAC curve has increased by more than 20%

of Its amplitude, the examiner shal1:

(1) Recalibrate examination system.

(2) Re-evaluate all Indications recorded since the previous calibration at the corrected sensitivity level.

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 shall:

(1) Correct the sweep calibration and note it on the Calibration Data Sheet.

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 11 0F 31 (2) Vold any data sheets made since the previous cali-bration which have recorded indications and re-examine those areas.

8.0 EXAMINATION SYSTEM CAllBRATION 8.1 Straight Beam Calibration for RPV Shell Welds Straight beam sweep calibration and distance-amplitude correction shall be performed as follows and as shown in Figure 7:

(1) Adjust the instrument sweep controls so that the signal responses from the 1/4T and 3/4T holes occur at the 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 sensitivity 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 O signal amplitudes and locations on the CRT.

(4) Plot a DAC curve by connecting the locations (marked on the CRT) with a continuous line extended to cover the full examination range as shown in Figure 7 (5) This is the primary reference sensitivity. Record all sensitivity control settings on the appropriate Calibration Data Sheet.

8.2 Straight Beam Calibration Ste.ilizer Bracket Welds Straight beam sweep calibration and distance-amplitude correction shall be performed as follows and as shown in Figure 8:

(1) Adjust the instrument sweep controls so that the signal response from holes C, D, and E are displayed

, on the sixth (6th), eighth (8th) and tenth (10th) horizontal screen 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 Full Screen Height (FSH) and mark location and amplitude on the CRT.

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PROCEDURE NO. 80A0471 i

SUBJECT:

MANUAL RPV WELDS PAGE 12 0F 31 L y (3) Without changing sensitivity, position the search

unit respectively on the remaining holes and mark signal amplitudes and locations on CRT.

(4) Plot a DAC curve by connecting the locations (marked on the CRT) with a continuous line extended to cover the full examination range as shown in Figure 8.

(5) This is the primary reference sensitivity. Record all sensitivity control settings on the appropriate

! Calibration Data Sheet.

3 8.3 Straight Beam Calibration Check Straight beam calibration check as required by Section 7.4.3 shall be performed as follows:

(1) Adjust the sensitivity control settings to those recorded for the calibrated reference sensitivity.

See Sections 8.1 (2) and 8.2. (2).

(2) Reposition search unit at each respective test hole and observe maximum signal response amplitudes, and 4

horizontal screen positions.

4 (3) See section 7.5 for signal response requirements during calibration check.

8.4 Angle Beam Calibration Angle beam sweep calibration and distance-amplitude correction should be performed as follows and as shown in Figure 7:

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(1) Adjust the instrument sweep controls so that the signal response from the 1/4T and 3/4T holes occur at the second (2nd) and sixth (6th) horizontal screen positions as shown in Figure 7 To verify sweep

calibration, insure that response from square notch

] cppears near the eighth (8th) 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 ampli-tude 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.

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PROCEDURE NO. 80A0471 2,

SUBJECT:

MANUAL RPV WELDS

,~ PAGE 13 0F 31 (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 corrective device, the primary reference response shall be equalized at 80% of FSH over the distance range to be employed in the'examina-tion.

(6) Plot a Distance Amplitude Correction (DAC) curve by connecting the locations (marked on the CRT) with a continuous line extended to cover the full examination range as shown in Figure 7 (7) This is the primary reference sensitivity. Record

all sensitivity control settings on the appropriate Calibration Data Sheet.

(8) Report all data and instrument settings on the Calibra-tion Data Sheets.

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8.5 Angle Beam Calibration Check

(} Angle beam calibration check as required by Section 7.4.3 shall be performed as follows:

(1) Adjust the sensitivity control settings to those recorded for the calibrated reference sensitivity.

See Section 8.4 (2).

(2) Reposition search unit at each respective test hole

and observe signal response amplitudes and horizontal screen positions.

(3) See Section 7.5 for signal response requirements during calibration check.

9.0 EXAMINATION PROCEDURES 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 levei givigg an initial-back reflection signal amplitude .of 80% 'FSH.

9.1.2 A rectilinear scan pattern shall be used." 3 1

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PROCEDURE NO. 80A0471 CUBJECT: MANUAL RPV WELDS PAGE 14 0F 31

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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.

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 ar it is moved along a retilinear 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 n

\/ 10.1 Recording of Indications 10.1.1 For straight beam examinations of the base metal for lam 8 nations, all areas giving indications equal to or greater 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.

(1) Each recorded area shall be identified as to distance from surface, length and position relative to the weld datum point.

(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% of the reference response shall be recorded on the appropriate data sheet at the time of weld examination. Planar indications at or near the 1 far surface shall be compared directly with the amplitude obtained i from the notch. i l

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l PPOCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS

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(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.

(2) Recorded data shall be taken on each parallel scan pass at increments not to exceed that permitted by the 25% overlap of transducer clement diameter (width).

(3) The end points of recorded indications shall be determined by 50% DAC amplitude points.

10.1.3 Indications from the RPV vertical weld shall be reported in inches below the datum point, and in inches CW or CCW from the centerline of the weld.

10.1.4 Indications from the RPV circumferential welds shall be recorded in inches (or degrees) CW or CCW from weld datum point, and in inches above or below the weld centerline.

10.1.5 Indications from the stabilizer bracket welds shall be reported in inches on the X, Y axis from the datum points.

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(-) 10.2 Evaluation of Indications 10.2.1 Evaluation of all indications shall be made at the reference sensitivity and in accordance with the requirements of the

, ASME Boiler and Pressure Vessel Code,Section XI, 1S-300.

All evaluations shall be performed by a Level ll or Level 111.

10.2.2 Results of this evaluation shall be reported to the Plant Owner or his Agent in accordance with the requirementr 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 EXAMINAil0N RECORDS 11.1 Certification of Records The examiner shall complete and sign all data sheets immediately upon the completion of each weld examination. The data sheets may be reviewed by the authorized Code Inspector, 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 qualifications with a current i) s eye test report in accordance with SNT-TC-1A.

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 16 0F 31 1

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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 #NES 80A0448.

11.3.2 The examiner will contact the LILCO representative on site to initiate all such changes. All changes shall be documented in the record of revisions sections of this procedure.

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS 3 PAGE 17 0F 31 (Q

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PROCEDURE NO. 80A0471

SUBJECT:

PMNUAL RPV WELDS ,

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 20 0F 31 4-1 LEGEND 1 Perpendicular to Weld

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 21 0F 31 O WRV 5/16" Cladding e -

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 22 0F 31

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Standard Block Hole Hole Notch No. Thickness 1/4T 1/2T 3/4T Diam. Depth Depth SNPS-4 4-3/32" 1.02" 2.04" 3.06" 0.25" 3.00" 0.082" SNPS-6 fr5/32" 1.54" 3.08" 4.62" 0.25" 3.uv 0.123" [r

, SNPS-7 1/4 Figure 5 - Ultrasonic Calibration Standards for RPV Shell Welds l

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 23 0F 31 7.5" 6" -

_ 4 . 5 ' ' __. .

8" 9/16" Cladding

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26"

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Figure 6 - Ultrasonic Calibration Standard FG/LIG for RPV Stabilizer Bracket.-

. Welds. ._.

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. NUCLEAR ENERGY SERVICE 11NC.

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS f- PAGE 24 0F 31 1

l i i 2 3 .

f f n n n ,

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IT 3 fi-  ;

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! l lt h Straight Beam Search l [ i  ; i Unit Positions 0 2 4 6 8 Typical DAC Curve Nk?

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Angie Beam Search Unit Positions i'l I l'

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,l ti 1 i i i I O 2 4 6 8 Typical DAC Curve Step 1 - Adjust sweep controls so that 1/4T and 3/4T holes are located respec-tively on the 2nd and 6th horizontal screen positions.

Step 2 - Adjust sensitivity to provide 80% FSH indication from hole giving maximum response. 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 on screen with line extended to cover entire examination range.

Step 5 - Record all sweep and sensitivity control settings on respective data sheets. j Step 6 - Position search unit for maximum response from far surface notch and "X" mark screen and data sheet to indicate amplitude.

FIGURE 7. REFERENCE SENSITIVITY AND DAC CALIBRATION PROCEDURES FOR ULTRASONIC EXAMINATION OF WELDS e NUCl. EAR ENERGY SERVICES, INC,

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PROCEDURE NO. 80A0471

SUBJECT:

MANUAL RPV WELDS PAGE 25 0F 31 1 2 3 m n n f l l l 3 6" O 1 i l g., I i O l I 10" 1 C

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6

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, j i i i 6 I h Stabilizer Bracket 0 2 4 6 8 10 Calibration Typical DAC Curve Step 1 - Adjust sweep controls so that the C, D and E holes are located respectively on the 6th, 8th and 10th horizontal screen positions.

Step 2 - Adjust sensitivity to provide 80% FSH indication from hole giving maximum response. 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 on screen with line extended to cover entire examination range.

Step 5 - Record all sweep and sensitivity control settings on respective data sheets.

Figure 8 - Reference Sensitivity and Dac Calibration Procedures for Ultrasonic Examination of RPV Stabilizer Bracket Welds.

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PAGE ?6 0F 31 Plant / Unit Data Sheet No.

Comp / System CALIBRATION DATA SHEET Procedure No.

Subject Rev/ Change No.

INSTRUMENT SETTINGS SEARCH UNIT Calibration Block No.

Mfg /Model No.: Scan Angle: Mode:

Surface Serial No.  : Fixturing (if any): Block Temp 'F Comp. Temp "F Sweep Length : Style or Type No. : .-

Sweep Delay : DEPTH AMPL. ATTEN.

Size & Shape : Tnnia . in.  % da Pulse Length / Damping Frequency  :

Freq.: Rep. Rate: Serial No/ Brand :

Filter: Video: Jack: Measured Angle :

DEC/ Gate Switch: Range: Cable Type & Length:

4cde Select: Reject: Couplant Brand:

Sain (coarse): (fine): Couplant Batch:

100*'- DAC PLOT INSTR. LINEARITY CAL. 1 2 3 I. 5 90 Amplitude I 80 70 lHighl Low ;High Low sc-

1. I ' I SCAN AREA l' i i e e i t i 1 l 5 3C.i O' WRV 40 1 + + .:. I 4 t - i .

2 6 l . , , , , 3 O l 30' O 7 O' Mat'y l 20 I

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3 j  ? 8 i itoWeldi go'i.. . + .....~ ' -..'... i.n i ...l....t....ini, 4 8 ~

0 1 2 :: 4 5 6 7 8 9 10 AMPL. CONTROL LINEARITY Initial l 4 dB Result EXAMINATION RECORDABLE COM2iENTS/ REASON FOR INDICATION 80 -6 I WELD / AREA .

INCOMPLETED SCAN (S) 80 -12 Yes l Mo 40 +6 l l

20 +12 CALIBRATION CHECKS TIME l

Initial Cal.

Intemediate Intermediate Intemediate Final Cal.

ADDITIONAL SHEETS? (CHECK BOX) EXAMINERS 1 Date Level Continuation Beam Plot 2 Date Level Supplements None REVIEUER d4

• NUCLEAR ENERGY SERVICE &lNC

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Figure 9 - Calibration Data Sheet

PAGE 27 0F 31

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Weld l" k

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g INDICATION REPORT SHEET

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_ l Datum Procedure No.

I- O Subject k Weld No.

A X A Page of I Attached to Cal.

f Data Sheet No.

-- ~ L Notes :

fY~ (1) X-axis increments not to exceed bn n n f allowable scan increments.

D

" (2) End points shall be :(a) 50% of DAC

" * { (6db) for WRV Straicht Beam exam,

, y (b) equal to Remaining Back Re-i t. flection (RBR) for base material

• - y2 lamination exam.

1 (3) This column for WRV Straight Beam Section A-A exam only.

(4) This column for base material lam-ination exam only.

FCEWARD BACK l*.AX (,) Y J *:AX INDI- (,) (4) (f) (b)

CATION SIDE OF D X  % CAO RBR  % CAC -"Opo n:TggcpoINT b NO. WELD (in T/8s) ( db)  % FSH , (g) y (g)

COMMENTS EXAMINERS

1. Date Level I

'v/

2. Date Level REVIEWER O Date

( PAJCLEAR ENERGY SERvtCES.INC,

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PAGE ?S OF 11 l SUPPLEMENT AA f-( INDICATION REPORT SHEET Q

STABILIZER BRACKET WELDS o a Procedure No.

Subject D Part No.

, Page of y Attached to Cal.

n Data Sheet No.

.._ X -

y Notes:

2 l y

/ N 1i

/  % (1) X-axis increments not to exceed O JL5::JR p allowable sesn increments.

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(2) End points shall be :

(6db) 50% of DAC

/

Datum .

Point i FORWARD BACK INDI- (t) max Y e MAX (f) (b)

CATION SIDE OF D X  % DAC  % DAC INDPOINTENCPOINT NO. DATIL1 (idb) y () y (z)

COMMENTS EXAMINERS

1. Date Level O

2. Datt Level REVIEWER g .__Date

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l-PAGE 20 0F 31 b

SUPPLEMENT B t'

i Weld k INDICATION REPORT SHEET l ,! .1. ANGLE BEAM 1**'%e  :

l-T. 7

--Datum 0 Procedure No.

Subject X i Weld No.

Aj A Page of Q- - ---------

Attached to Cal.

j i Data Sheet No.

1 Wy-4 i L _

I Notes:

e (1) X-axis increments not to exceed

{ hn , allowable scan increments D

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(2) End points shall be 50% of DAC

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T-i 2 I__ l L._ _ 4 f (3) Data must be recorded from both

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sides. If indication cannot be

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Section A-A

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Ck; q Ok3) X MAX D @ M Y S 'M ' OU' NO. WFLD (in)  % DAC (T/8s) (i ) D7 l fi (in),l D7 y7 (in) in. %T I I e

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COMMENTS EXN4INERS l_ Date Level 2 Date Level G)

REVIEWER Date Nic EAR ENERGY SERVICEilNC. .

PAGE 30 0F 31

= .

SUPPLEMENT C

, Datum O i

INDICATION REPORT SHEET

= ANGLE BEAM A (1) px A

{-l Procedure No.

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, Weld No.

Y Page of

" We Attached to Cal.

-1 f (ld Data Sheet No.

I I 'I k Notes :

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(1) Y-axis increments not to exceed b f allowable scan increments g-h Q \ QQ (2) End points shall be 50% of DAC D 1 s

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( 6db)

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___ _ (3) Data must be recorded from both j,- l s sides. If indication cannot be J'g~-~~~~ I lX1 6 found from the opposite side, so a state.

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Section A-A INDI- SIDE MA DS4 INDICATIC'! FO M ARD (f) l BACK (b) CALC.

I E 'Y CATION OF (3) y MAX D 3 Mf 5 C L NO. WELD (in)  % DAC (T/8s) l (in) lD i Xy (in)f D., X7 (in) in. %T l

COMMENTS EXAMINERS

1. Date Level I

l

2. Date Level REVIEWER Date 4

l metua rs=am:uversac

PROCFDURE NO. 80A0471 SUP;ECT: MANUAL RPV WELDS P/.GE 31 0F 31 V

TABLE 1 ,

WELD IDENTIFICATION Weld No. Description Reference Block Reference Figures Notes 1-308A RPV Upper Shell Course SNPS-6 1, 5 Only Portions 1-3088 Vertical Welds @ Az. above shield 1-308C 30 , 1500, 270 wall (RPV EL.

618")

6-307 RPV Lower Shell Course SNPS-4 2, 5 to Upper Torus Weld 4-306 RPV Upper Torus to Lower SNPS-4 3, 5 Torus Weld 4-324A RPV Stabilizer Bracket FG/LIG 4, 6 3 4-324B Welds @ Az. 45 ,

sJ 4-324C 135 , 225 , 315 4-324D 1-306A 1-306B RPV Bottom Head Meridional Welds SNPS-4 1A, 5 b 1-306C 1-306D 1-306E 1-306F 1-306G 1-306H

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O NUCLEAR ENERGY SERVICES, INC.

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