ML17139C769
| ML17139C769 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 11/01/1984 |
| From: | SOUTHWEST RESEARCH INSTITUTE |
| To: | |
| Shared Package | |
| ML17139C765 | List: |
| References | |
| TP-ISI-307, NUDOCS 8412270410 | |
| Download: ML17139C769 (27) | |
Text
.PRGCEOURE COVER SHEET PEHVSVLV~'~IA PG~ER a LIGHT CQ.
SUSQUEHANNA STER%
ELECTRIC STATION KWNUAL ULTRASONIC EXAMIVATION OF AUSTEVITIC
. TP-ISI-307 Revision 0
Page 1 oE 27 Effective Date
- Exp irati on Date Revised Exoirat..'on Date PROCEOURE TYPE:
PORC NON-PORC Alternate Review PORC M
G
'i0
(: 'pplicabie)
Prepared by Reviewed by Recomnended:
ectio Head/Manager Date Date Date Date
/) /it.cy
/0 /8 c54-Superintendent of P ant,
. 84i22704ia 84ggg9
..g I".-I ON AOOCN OOOOOOSZ PDR FORM AO-QA-101-1, Rev.
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'1 of 1
TP-ISI-307, Revision G,
Page 2 of 27 P.RQCKDURE DEVfA'YtON c
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2 Susquehanna, Unit 2 OPllATIQNPAGE NQ.:
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2 18 October 1984 peg g
PRQCZUREIREVISIQN NQ.
IEI Z
600-31/12 EVLNIINATIQNPERIQQ:
1984 SECTIQNISI AFFECT cD:
2,3,5,7 and 8
PRQCZIURE PAQds);
2,6, 18 and 23 QP 24 94LMINATtQNAREAISlAFFE~aD:
Manual ultrasonic examination of austenitic pressure piping welds T.:ES DrVlATZOH SUPERCZ)FS DEvLKTiON 1 MeaTIQN:
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mspec on oi Nuc'~=
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Changes made at the request of Pennsylvanis Power
& Light Company (PPGL)
APPROVED Nuclear Support SwRI FQRM~
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TP-ISI>>307, Revision 0, Page 3 of 27 Swar-NDT-600-31/12 Deviation 2 October 1984
'Page 2 of 2 Change 5.6 to read as follows:
~Cu
~an (1)
USP-grade glycerine or deionized water (with or without wetting agent) shall be used when performing ultrasonic calibrations and examinations in accordance with this procedure.
(2}
SP-abrade
"-lyc "'"e sha' be cert==ied for suLfur content and tots'alogens in accordance with ASTH SD-129 and AS'D-808 of Article 24,Section V.
Only ultrasonic couplants meeting PPGL requirements shall be used ae following "etals shall not be known sdd d const'tuents of the material:
silver> zinc, cadium, mercury, ga. '~, lad',
.ead,
Deionized water, when used, shall be supplied oy tae customer.
(3)
Other compounds, which in the opinion of the Level II or III examiner provide adequate ultrasonic coupling, may be used upon concurrence of the Prospect Manager responsible for the examination.
(4)
Couplant materials used for examination shall be the same as used for the calibration.
Change the first paragraph of 7.1.1 to read as follows:
Circumferential and longitudinal full-penetration butt welds with a nominal thickness of greater than 0.4 to 5.0 inches and a nominal. diameter of 4.0 inches or greater shall be examined from the outside surface of the pipe ~
Change the first paragraph of 7.1.2 to read as follows:
Pull-penetration butt welds of branch connections in pressure piping greater than 0.4 to 5.0 inches nominal thickness and a nominal diameter of 4.0 inches or greater shall be examined from the outside surface of the pipe.
Add the following as the fifth paragraph under Section 8:
The investigation of ultrasonic reflectors not readily attributable to geometry should be accomplished, but not limited to, taking profiles and additional thi.ckness measurements at the location of the indication, plotting the indication on a scale drawing, reviewing previous baseline data including that, of other NDE methods used or re-examination using different angles.
Title SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-K)T>>600-31 Revision 12 June 1984 Page 1 of 24 HANIIAL ULTRASONIC EXAiiXNATIONOP AUSTENITIC PRESSURE PIPING wELDS EFFECTIVITYANO APPROVAL Revision ot this Orooedure heeeme effectiv on 12 he etieotive eoneurrentiv.
Aoorovals Manager of CLA.
Oate
) 4V4LQ Oate Technical Review
~A Cogn' Oirector Gatel~
</~I The following information may be used for convenience.
Co letion of this portion is not mandatory.
Oeviation No.
Oate Effective Procedure Sectionts)
Affected Notes:
APPROVED Nuclear Support T'tt)@E'er s'-
Signature:
~rr~~ Pj ve PZI's'/'co.t SwRI FOrm QA<OAeO
TP-ISX-307, Revision 0, Page 5 of 27 SOUTHWEST R ES EAR CH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRZ-NDT-600-31 Revision 12 June 1984 Page 2 of 24 MANUAL ULTRASONIC EXAMINATXONOF AUSTENXTZC PRESSURE PXPING WELDS SwRX-NDT-600-31 1 ~
PURPOSE This procedure provides the technical information and detailed steps required to ensure a complete, accurate manual ultrasonic examination of similar or dissimilar metal welds and adjacent base material in clad or unclad austenitic pressure piping in accordance with the applicable ASME Boiler and Pressure Vessel Codes.
2 ~
SCOPE AND APPLICATION Pressure piping welds and the adjacent base material in the nominal thick-ness range of greater tI ~n 0.4.to..5.0 inches. ahtall be examined..
II r
Manual, contact, pulse-echo, shear-wave angle-beam, and longitudinal-wave straight-beam ultrasonic techniques shall be ut'lized for the exam'nat'on of welds and adjacent base material in extruded austenitic pressure piping.
Similar and dissimilar metal circumferential and longitudinal pipe welds and branch connection butt welds to be examined shall be as specified in the applicable SwRX Examination Plan.
3
~
APPLZCABLE DOCUMENTS (1)
ASME Boiler and Pressure Vessel
- Code,Section XI, 1980 Edition, with Addenda through Winter 1980, "Rules for Inservice Inspection of Nuclear Power Plant Components" (2)
APEAK Boiler and Pressure Vessel
- Code,Section V, 1980 Edition, with Addenda through Winter 1980, "Nondestructive Examination," with the exception of the following:
Figure T-546-1 of Article,5, Sect'on V, requires the basic cali-bration. block for the average weld thickness (t) up to and including 1 inch to be 3/4 inch or t.
Paragraph 5.3 of this procedure requires the basic calibration block. to be either t, no more than 25/ less than t, or closer in thickness to t than the 3/4-inch alternate thickness allowed by Article 5 for t up to and including 1 inch.
This will assure a more accurate calibration than the Article 5 basic. calibration block design allowed by Code.
SwRI Form QA 3-2
TP-ISI-307, Revision 0, Page 6 of 27 SOUTHWEST RES EAR CH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-600-31 Revision 12 June 1984 Page 3 of 24 (3)
SwRI Nuclear Quality Assurance Program Manual (NQAPM) 3 ~ 1 Calibration and Examination Records SwRI-NDTR Form No ~
Revision Date 17-18 17-19 17-25 17-37 17-89 17-90 7 31 75 12-1-83 7-10-80 2-18-80 8-19-80 8-19-80 4.
RESPONSIBILITY The Di"ector of the Department or Engineering Se"vices, Quality Assurance Systems and Engineering Division, shall be responsible for the preparation, review, approval, and control of this procedure'2)
The Project Manager shall be responsible for the implementation oi this procedure in accordance with the NQAPM specified in the appU, cable SwRI Project Plan.
(3)
The examiner shall be responsible for 'implementing the requirements of this procedure.
(4)
The Manager of the Support and Administration Section, Quality Assur-ance Systems and Engineering Division, shall be responsible for stor-age of records generated in accordance with this procedure.
5 PERSONNEL ArVD EOUIPMENT 5.1 Personnel Certification Persoaael performing ultrasonic examiaations shall be certified ia accordance with SwRI NQAP 11-1, "Special Process Control."
5.2 Reference Block Reference blocks used for screen distance calibration and veri-fication shall be of the same material as the production material; i.e., stain-less steel or carbon steel, and shall be oae of the following:
(1) SwRI Half-
SwRI Form QA 3-2
TP-ISI-307, Revision 0, Page 7 of 27 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-600-31 Revision 12 June 1984 Page 4 of 24 5.3 Basic Calibration Block for Circumferential Lon itudinal and Branch Pi e Connection Welds SideMrilled basic calibration hole reflectox's, in accordance with Section V of the ASME Boiler and Pressure Vessel Code, shall be placed in a 'olock manufactured from the same product form, and material specification and heat treatment as one oi the mater a~s oe ng.joined.
ihe ~libration coaxial shall be determined by the production piping matexial to which the search unit is applied.
The basfc calibration block thickness shall be determined by the ave age weld 1
ass
~x the gw
~g>>~ whi~h
~~e soa~r h u~'t 4s aooliad
>~8 Article 5,Section V.
When a basic calibration b1.ock oi the same thickness as t is not available and where t f.s 1 inch or less, the basic calibration block thickness shall be no more than 25K thfnner than t or shall be closer to t than the 3/4-inch thick alternate calioration olock allowed by Article 5.
Where the component material is clad, the block shall be clad by t¹ sa e weldin~ procedure as the production part.
Where the automatic method is impractical, deposf.tion of clad shall be by the manual method.
The surface finish of. the basic calibration block shall be repre-sentative of the surface finish of the piping.
Flat basic calibx'ation blocks or blocks of essentially the same curvature as the part to be examined may be used when contact surface curva-tures are greater than 20 inches in diameter.
A curved basic calfbration block shall be used to establish distance amplitude correction (DAC) curves for examinatf.ons on contact suxfaces in the range of curvature from 0.9 to 1.5 times the basic calibration block
- diameter, when contact sux'face curvature is 20 inches in diameter or Less.
The curvature of the main run pipe shall be used to establish the requirements for the basic calibration block curvature for the examination of branch connection welds.
Approved drawings of basic calibration blocks to be used in accordance with this procedure are contained in the applicable SwRI Examination Plan.
SwRI Form OA 3-2
TP-ISI-307, Revision 0, Page 8 of 27 SOUTHWEST R ES EAR CH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-600-3 1 Revision 12 June 1984 Page 5 of.24 5.4 Search Units Search units shall be selected from the following tables:
i )
A reraee
<field hickness Nominal Search Unit Size 2.0" 1.0"
~7 PH 3
OM or less to 3.0" to 4.0" to 5.0" 1/4." Round 3/8" Round 1/2" Round 3/4" to 1" Round (a)
The nominal straight-beam longitudinal-wave search utw.t rrequencj zoo austenwt c
p3 p3 ng enamel oe
.5
'.!Hz or 2.25 ':!Hz, and 2.25 2Hz for carbon steel.
Avera e Field Thickness.
Nominal Search Unit Size 1.0" or less'.4"'o2 0" 0.75" to 4.0" 2.0" to 5-0" 1/4" x 1/4", 1/4" Round 3/8" x 3/8", 3/8" Round 1/2" x 1/2", 1/2" Round 1/2" to 1", 3/4" Round NOTE The nominal angle-beam shear-wave search unit size for austenitic materials should be 3/8" round or 3/8" x 3/8" when thickness and curvature permit its usage.
(a)
The exit point of the sound beam and the actual refracted beam angle of shear~ave search units shall be determined on an IIW block.
The exit point shall be marked on the search unit wedge.
(b)
The nominal angle-beam shear-wave search unit fre-quency for examination of austenitic piping shall be 1.5 MKz ~
(c)
The nominal angle-beam shear-wave search unit frequency for the carbon steel side of dissimilar piping welds shall be 2.25 iMz.
, SwRI Form OA 3-2
TP-ISI-307, Revision 0, Page 9 of 27 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-600-3 1 Revision 12 June 1984 Page 6 of 24 (d)
Search unit wedges shall be fabricated to produce 45'2'efracted shear-wave when examining circum-
, ferential piping welds.
A, 60'2'efracted shear-wave shall be used only to augment the examination.
(e)
Por examination oi longitudinal piping welds or oranch connection welas, search unit dredges shall be fabricated to produce 45'2'efracted shear waves.
5.5 Ultrasonic Instrument The exa in" sha-use a
Son c
~TS
.Dr.
k I u " asonic ins" ument which shall be aligned and shall display a valid alignment calibration tag as required bv NQAP 10-1.
5.6
~Cou iant (1)
USP-grade glycerine or deionized water (with or without wettin~ agent) shall be used when performing ultrasonic calibrations and examinations in accordance with this procedure.
USP-grade glycerine shall be certified for sulfur content and total halogens in accordance with SD-129 and SD-808 of Article 24,Section V.
The residual amount of total sulfur or halogens shall not exceed 1X by weight.
Deion-ized water, when used, shall be supplied by the customer.
(3)
Couplant materials used for examinations shall be the same as used for the calibration.
5.7 Thermometer The thermometer to be used for measuring the calibration block and component temperatures shall be calibrated and certified and shall display a valid calibration tag as required by MQAP 10-1.
.. '6 ~
CALIMATIONiKTEOD 6.1 Instrument Linearit Ultrasonic instrument linearity shall be verified onsite as a
minimum within one day before and one day after examining all welds to be examined with an instrument during an outage or every three months, whichever.
is less, in accordance with Paragraphs 6.1.1 and 6.1.2.
Additionally, if a calibration verification'does not meet the requirements of 6.6.3 of this pro-
- cedure, an instrument linearity check must be performed prior to continuing SwRI Form QA3-2
TP-ISI-307, Revision 0, Page 10 of 27 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-600-31 Revision 12 June 1984 Page 7 of 24 examinations.
Data xequired shall be recorded on the SwRI Instrument Linearity Verification Record and the sheet number shall be referenced on each applicable SwRI Sonic Instrument Calibration Record.
I The setxin~ of the damping control shal'e recorded in 9":QRZ" on the Sw".
Instrument Linearity Verification Record.
The damping contxol shall be in the same position during linearity verificat'on, calibrations and examinations or a new linearity verification shall be performed.
6.'.1 Amplitude Linearit (1)
Position a sheax wave search unit on a calibration block to obtain indications from the 1/:.
and 3/4T holes.
(2)
Adjust the search unit position to give a 2:1 ratio between the two indications, with the larger indication (1/2T hole) set at 80X of full screen height (FSH) and the smaller indication (3/4T hole) at 40% of PSH.
(3)
Without moving the search unit, set the larger indication to 100X of FSH; record the amplitude of the smaller indica-tion, estimated to the nearest 1X of FSH.
(4)
Successively set the larger indication from lOOX to 20X of PSH in 10X increments (or 2 dB steps if a fine contxol is not available);
observe and record the smaller indication estimated to the nearest 1% of PSH at each setting.
The reading must be 50X of the larger amplitude within SX of FSH.
6.1.2 Am litude Control Linearit (2)
Position a shear~ave search unit on a calibration block to obtain maximum amplitude from the 1/2T hole.
Without moving the search unit, set the indication to the required percent of FSH and increase or decrease the dB as specified belo~.
The estimated signal shall be recorded to the nearest 1X of FSH and shall fall within the limits of the following table:
SwRl Fotm QA 3-2
TP-ISI-307, Revision 0, Page 11 of 27 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEOURE SwRI-HDT-600-31 Revisioa 12 June 1984 Page 8 of 24 Indication Set at X of FSH dB Control Chan e*
Indication Limits X of FSH 80X 80X 40%
20%
-6dB
-12dB
+6dB
+] adB 32 to 48X 16 to 24X 64 to 96X 64 to 96%
nus denotes decrease in ampl'tude; plus denotes increase.
'6. 2 Calibration
- ~mination.
The ultrasonic calibration shall be completed prior to the The REJECT control shall be maintained in the 0 position.
The FREQ Mz control shall be turned to 1 when a 1.5 NHz search unit is used and to 2 with a 2.25 Ki" searcn unit.
The instrument gaia controls shall not be changed once the pri>>
mary reference response has been established.
The centerline of the search unit shall be at least 1-1/2 inches from the nearest side of the block.
Rotating the beam into the corner formed by the hole and the side of the block may produce a higher amplitude at a longer beam path.
This beam path shall not be used for calibration.
The type aad length of the search unit cable shall be recorded on the SwRI Sonic Instrument Calibration Record, and all other information blocks on the form shall be filled in.
The nominal piping production material thickness shall be used to determine the correct calibration block and search units for-examinations with geometric restrictions such as piping ox components which may be thicker than the nominal pipe size, examinations limited to one side of the veld or vide veld crowns-The Level II or III examiner shall ensure that complete coverage of the examination area is obtained.
Additional calibratioa vee>>path positions and larger screen sizes vhich may be required to assure this covex'age shall be used for the examination fxom either side of the weld.
SwAI Farm QA 3-2
TP-ISI-307, Revision 0,
- Page, 12 of 27 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEOURE SwRI-NDT-600-3 1 Revision 12 June 1984 Page 9 of 24 6.2.1 Tem erature The temperature of the calibration block shall be within 25'F of the component temperature and shall be recorded on the SwRI Sonic Instrument Calibration Record for the initial calibration and each verification.
h surface temperature of the component to be examined shall be taken prior to performing an examination and shall be recorded on the appli-cable SwRI Examination Record.
6.3 Calibration fo" Circ&~ e ntial Butt fields o ~ 0 ~ L Serai't Beam D 'tance Cd..bracion
~ne screen distance chosen shali be'-he s<<ortest appl cable s'"
to include at least 1/4t beyond the th'ckest production material to which the search unit is applied-Observing back reflections from the applicable reference
- block, set up the required linear sound path distance along the screen baseLine.
6.3.2 An le-Beam Distance Calibration The screen distance chosen shall be the shortest applicable size to include at least 1/8 vee~ath past the anticipated examination range.
Observing radius echoes from the applicable reference block, set up the required linear sound path distance along the screen baseline-If a 60'hear-wave angle-beam is required to augment the exami-
- nation, and the same instrument is used for both 45'nd 60'xaminations, the screen distance calibration shall be conducted as follows:
(
(1)
The screen distance size shall be determined by the angle-beam search unit requiring the longer examination range.
(2)
(3)
Position the 45'earch unit on the appropriate reference block and record all required reference block entries on the appropriate SwRI Sonic Instrument Calibration Record.
Without changing the calibrated screen
- distance, repeat step (2) with the 60'earch unit.
(4)
No attempt shall be made to compensate for the delay dif-ference between 45'nd 60'creen distance calibrations.
This difference shall be considered when resolving indications.
SwAI Farm QA3-2
TP-ISI-307, Revision 0, Page.
13 of 27 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-HDT-600-3 1 Revision 12 June 1984 Page 10 of 24 6.3.3 Strai ht-Beam Distance Am litude Correction A DAC curve shall be established by utilizing'responses from the basic calibxation holes.
6.3.3.1 Production Material 1 Inch or Less in Thickness (1)
Position the straight-beam search unit to obtain maximum response from the 1/2T hole, and set this response to 80X MX of FSH.
(2)
Draw a stx'aight horizontal line on the instrument screen ho@ a Arrltlr'r ~ bert+
hh goH )ttr4 I
A'r pt J thO 4rtl'Id
~
I A l tip I o4 v kka
'l nominal thickness of the production material.
(3)
Signal amplitudes or indications recorded shall be refer-enced as a percentage of this line.
6.3.3.2 Production Material Greater Than 1 Inch in Thickness (1)
Position the straight-beam search unit to obtain maximum response from the calibration hole selected from the following, which produces the highest amplitude:
Hole 1/4T 1/2T (if present) 3/4T (2)
Set this response to 80X &5X of FSH and mark the amplitude on the screen.
The gain contxols shall not be adjusted once this primary reference response has been established.
(3)
Obtain. maximum response from the remaining calibration holes; mark and join all amplitude points with a smooth curved line that shall extend 1/4T beyond the last qualified calibration point.
6-3.4 An le-Beam Distance Am litude Correction If a curved block is used, DAC curves for the examination of circumferential welds shall be constructed by utilizing the responses from the holes oriented perpendiculax to the axis of the basic calibration block.
SwRI Form QA3-2
TP-ISI-307, Revision 0, Page l4 of 27 SOUTHWEST R ES EAR CH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-600-31 Revision 12 Zune 1984 Page 11 of 24 6-3.4.1 Material 1 Inch or Less in Thickness (1)
Position the 45'earch unit to obtain maximum response from the calibration hole and vee-path position, selected from the follo~ing, that produces the highest amplitude:
tvc'2 24 4n L OQ JetAons 1/2T 2/8, 5/8, 10/8 (2)
Set this response to 80% 05% of FSH and mark the amplitude the screen.
he ~ain con<<ro s she' not be ad-:usr:~d once this primary reference response has been estaolished.
(3)
Obtain maximum response from the remaining vee-path oosi-tions; mark and join all amplitude points with a smooth curved. line that shall not extend more than 1/8 vee-path beyond the last qualified calibration point.
(4)
L. a 60'hear-wave angle-beam is required to augment the examination,. repeat steps (1) through (3) using a 60'earch unit.
EXCEPTIONS If the configuration of the weld is such that the 45'earch unit sound-beam is not directed into the A-B-E-F intersect (as depicted in Figure 1),
a 14/8 vee-path calibration shall be accomplished with the 45'earch unit.
6.3.4.2 Material Greater Than l Inch to 3 Inches in Thickness (1)
Position the 45'earch unit to obtain maximum response from the calibration hole and the vee-path position, selected from the following, that produces the highest amplitude:
Hole Vee-Path Positions 1/4T 1/2T (ii present) 3/4T 7/8 2/8 3/8, 5/8 SwRI Form QA 3-2
TP-ISI-307, Revision 0, Page 15 of 27 SOUTHWEST RES EARCH INSTITUTE SwRI-NDT-600-31 Revision 12 June 1984 R
I NUCLEAR PROJECTS OPERATING PROCEDURE Page 12 of 24 (2)
Set this response to 80X MX of FSH and mark the amplitude on the screen The gain controls shall not be adjusted once this primary reference response has been established.
(3)
Obtain maximum response from the remaining vee-path posi-tions; mark and join all amplitude points with a smooth
" rved 'ne that shal'ot extend more than 1/8 vee-path beyond the last qualified calibration point.
(4)
If a 60'hear-wave angle-beam is required to augment the examination, repeat steps (1) through (3) using a
60'earch unit.
WCEPTION I" the configuration of the weld is such that a 45'earch unit beam is not directed into the A-8-E-F intersect (as shown in Figure 1),
a 13/8 vee-path calibration shall be accomplished with the 45'earch unit.
6.3.4.3
~hterial Greater ~aa 3 inches to " Inches ia.h=ckness (1)
Position the'5'earch unit to obtain maximum response from the calibration hole and the vee-path position, selected from the followiag, that produces the highest amplitude:
Hole 45'ee-Path Positions 1/4T 1/2T (if present) 3/4T 7/8 2/8 3/8, 5/8 (2)
Set this response to 80X ~5X of FSH and mark the amplitude on the screen.
The gain controls shall not be adjusted once this primary reference response has been established.
(3)
Obtain maximum response from the remaining vee-path posi-.
tions; mark and join all amplitude points with a smooth curved line that shall not extend more than 1/8 vee-path beyond the last qualified calibration point.
(4)
If a 60'hear-wave angle-beam is required to augment the examination, repeat steps (1) through (3) with a 60'earch unit utilizing the following vee-path positioas:
SwAI Form OA 3-2
~TP-ISI-307, Revision 0, Page 16 of 27 SOUTHWEST RESEARCH INSTITUTE SwRX-NDT-600-31 Revision 12 June 1984 R"
I NUCLEAR PROJECTS OPERATING PROCEDURE Page 13 of 24 Hole 60'ee-Path Positions 1/4T 1/2T (if present) 3/4T 6.3.4.4 Clad Pioing 1/8 2/8, 6/8 3/8, 5/8 (1)
Position the 45 search unit to obtain
~w.Zmum response from the calibration hole and the vee-path position, selected from the following, that produces the highest amplitude:
Hole Vee-Path Positions
/4m 1/2T (if present) 3/4T 1/8 2/8 3/8 (2)
Set this response to SG". ~5K o
."-SH and mark the amplitude on the screen.
The gain controls shall not be adjusted once this primary reference response has been established.
(3)
Obtain maximum response from the remaining vee-path posi-tions; mark and join all amplitude points with a smooth curved line that shall extend 1/8 vee-path beyond the last qualified calibration point-(4)
Zf a 60'hear~ave angle-beam is required to augment the examination, repeat steps (1) through (3) with a 60'earch unit.
6.4 6.4.1.
Calibration for Branch Connection and: Con itudinal Seam Velds Strai ht-Beam Distance Calibration The straight-beam distance calibration shall be the same as that described in Paragraph 6.3.1.
6-4-2 An le-Beam Distance Calibration The screen distance chosen shall be the shortest applicable size to include at least 1/8 vee-path past the anticipated examination range.
SwAI Farm QA 3-2
TP-ISI-307, Revision 0, Page 17 of 27 SOUTHWEST RESEARCH INSTITUTE SwRI-NDT-600-31 Revision 12 June 1984 e
R I
NUCLEAR PROJECTS OPERATING PROCEOURE Page 14 of 24 Observing'the radius echoes from the applicable reference
- block, obtain the required linear sound path distance along the screen baseline.
6.4.3 Strai ht-Beam Distance Am litude Correction The straight-beam distance amplitude correction shall be the same as that described in Paragraph 6.3.3.
6.4.4 An le-Beam Distance Amplitude Cor"ection If a curved block is utilized, DAC curves shall be constructed bv utilizing the responses from the basic calibrat'on holes oriented axially l
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(1)
Position the 45'earch unit to obtain maximum response from the calibration hole and vee-path position, selected from the following, that produces the highest amplitude:
Hole Vee>>Path Positions 1/2T 2/8, 6/8, 10/8 (2)
Set this response to 80X MX.of FSH and mark the amplitude on the screen.
The gain controls shall not be adjusted once this primary reference response has been established.
(3)
Obtain maximum response from th'e remaining vee-path posi-tions; mark and join all amplitude points with a smooth curved line that shall not extend more than 1/8 vee-path beyond the last qualified calibration point.
6.4.4.2 Material Greater Than 1 Inch to 5 Inches in Thickness (1)
Position the 45'earch unit to obtain maximum response from the calibration hole and the vee-path position, selected from the following, that produces the highest amplitude:
Hole Vee-Path Positions 1/4T 1/2T (if present) 3/4T 7/8 2/8 3/8, 5/8 SwRI Form QA 3-2
TP-ZSI-307, Revision 0, Page SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-600-3 1 Revision 12 June 1.984 Page 15 of 24
{2)
Set this response to 80X ~MX of FSH and ma'rk the amplitude on the screen.
The gain controls shall not be adjusted once this primary reference response has been established.
(3)
Obtain maximum response from the remaining vee-path posi-tions; mark and join all amplitude points with a smooth
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beyond the last qualified calibration point.
This calibx'at'on shall be the same as tha" described in Para-graph 6.3.4-4, steps (1) througn {3), using toe 45'earch un@,t on'y.
6-5 Secondar DAC Calibrations If all points on the DAC curve do not appear at 20X of FSH or
- greater, a secondary DAC curve shall be.constructed as follows:
(1)
All secondary DAC curves shall contain at least 2 points' (2)
The DAC point at 20X of FSH or greater, adjacent to a DAC point that falls below 20X of FSH, shall be brought to the px'imary refex'ence level and marked on the instrument screen.
The adjacent point(s), previously at less than 20X of FSH, shall be marked on the screen and all points connected with a smooth curved line.
The gain setting for this secondary DAC curve shall be recorded on the appro-priate SwRI Sonic Instrument Calibration Record.
EXCEPTIONS
%hen the first DAC point is the only point above 20X of FSH, the next highest point shall.be brought to the primary reference level and marked on the instru-ment screen.
The other points previously at less than 20X of FSH shall be marked on the screen and all points connected with a smooth curved line.
It shall not be necessary to construct a secondary DAC when the calibration consists of a 2/8, 6/8, and 10/8 vee-path.
SwAI Form QA 3-2
TP-ISI-307, Revision 0
Pa e
19 of 27 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI NDT-600-31 Revision 12 June 1984 Page 16 of 24 6.6'alibration Verification 6.6.1 Swee Ran e and DAC Curve Verification Sweep range calibration shall be verified on the appropriate reference block; and DAC curve calibration, if applicable, shall be verified on the appropriate basic calibration block:
(1)
Prior to a series of examinations (2)
With any substitution of the same type or length of search unit cable (3)
Wi.th any substitution utilizing the same type oi power source: e.g.,
a change of batteries (4)
At least every 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> during the examination (5)
At the completion of a series of examinations (6)
Whenever the validity of the calibration is in doubt 6 6-2 Verification of Calibration Reflectors at Scannin S eed The examiner shall verify the presence of the calibration reflector at scanning speed when required.
NOTE It is not necessary to assure that this check confirms the signal amplitude at 100X of reference level, but merely to demonstrate that the signal from the calibration reflectors are readily observable at scanning speed.
The following statement shall be documented on the SwRI Sonic Instrument Calibration Record and initialed:
6.6.3 "Calibration reflectors have been verified at scanning speed."
Calibration Chan es (1)
Perform the following if any point on the DAC curve has decreased more than 20X of FSH or 2 dB in amplitude, or any point on the sweep 1ine has moved more than 10X of the sweep division reading or 5X of full sweep whichever is greater:
SwRI Form QA 3-2
TP-ISI-307, Revision 0, Pape 20 of 27 SOUTHWEST RES EARCH INSTITUTE SwRI-NDT-600-31 Revision 12 June 1984 R+
l NUCLEAR PROJECTS OPERATING PROCEDURE Page 17 of 24 (a)
Void all examinations referring to the calibration in question and performed after the last valid calibration verification-(b)
Conduct a new calibration.
H (cj Reexamine the areas "or which examinations have been voided.
(2)
Perform the following if any point on the DAC curve has increased in amplitude more than 20K of FSH or 2 cS:
(a)
Correct the calibration.
(b)
Reexamine all indications recorded since the last valid calibration verification.
(c)
Enter proper values on a new SwRI Examination Record.
6.6.4 bration
Recalibration Substitution of any of the following shall be cause for recali-(1)
Search unit transducer or wedge (2)
Search unit cable type or length (3)
Ultrasonic instrument (4)
Examination personnel (5)
Couplant (6)
Change in type of power source; e.g.,
a change from alternating to direct current swRI Form QA 3-2
TP-ISI-307, Revt,sion 0, Page 21 of 27 SGUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRZ NDT-600-31 Revision 12 June 1984 Page 18 of 24 7 ~
EXAMZNATTON 7.1 Examination Areas 7.1.1 Circumferential and Lon itudinal Butt Welds in Pi in C'rcumferential and long'tudinal full-penetration butt welds with a nominal thickness of greatex than 0.4 to 5.0 inches shall be examined
'rom the outs'de sur ace of the pipe.
Scanning of the weld and base material shall be adequate to ensure complete coverage for 1/3t from the inside surface of the pipe as shown J~
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measured from the outside surface fusion line on each side of the weld.
Class 1 longitudinal welds shall be examined a'ong the entire length of the weld during the presexvice examination and for at least one pipe-diameter length or 12 inches, whichever is less, from the fusion line of the intersecting circumfex'ential weld during inservice examinations.
Class 2 longitudinal welds shall be examined for at least 2-1/2t length from the fusion line of the intexsecting circumferential weld during preservice and inservice examinations.
7.1.2 Butt Welds of Branch Connections Pull penetration butt welds of branch connections in pressure piping greater than 0.4 to 5.0 inches nominal thickness shall be examined from the outside surface of the pipe.
Scanning of the weld and base material shall be adequate to ensure complete coverage for 1/3t from the inside surface of the pipe.
The base material shall be examined for a distance of 1/4 inch measured from the outside surface fusion line on the main run pipe side of the weld.
7.2 Sux'face Condition The contact surfaces shall be free from weld spatter, roughness, or other conditions which interfere with free movement of the search unit or impair the transmission of ultrasound.,
SwRI Form QA 3-2
TP-ISI-307, Revision 0, Page 22 of 27 SOUTHWEST R ES EAR C H INSTITUTE NUCLEAR PROJECTS OPERATING PROCEOURE SwRI-NDT-600-3 1 Revision 12 June 1984 Page 19 of 24 7.3 Indication Len th Zero Reference (Lo) Location Areas to be examined in accordance with this procedure shall have an Lo marked in accordance with the applicable revision of SwRX Nuclear Projects Operating Procedure IX-FE-103.
7.4
~Scannin When practicable, scanning shall be performed at a minimum gain setting of 2 times the reference level sensitivity.
Instrument gain setting for scanning shall be determined on the b sic calibration block as follows ior each pri~mry reference level utilized:
(2)
With the insgrument at the primary reference level, manip-ulate the search unit on the basic calibration block to obtain a signal oi 40Ã of FSH from a cali'oration reflector (side-drilled hole).
Add 6 dB gain by utilizing the 6
dB switch (if present),
the fine gain control, or a combination of the fine and coarse gain.controls and choose any method that yields a signal response within +2 dB of 80K FSH.
(3)
This amplitude and method shall be recorded on the SwRI Sonic Instrument Calibration Record and shall be used during the valid calibration period for all scanning at 2
times thei reference level sensitivity.
Scanning overlap shall be a minimum of 2~Z of the search unit piezoelectric element dimension perpendicular to the direction of the scan-second.
The search unit movement rate shall not exceed 3 inches per 7.5 Thickness Measurements and Lamination Scan 7.5.1 Thickness Measurements Thickness measurements shall be taken at a minimum of three..
poi~g adjacent to Lo for longitudinal and circumferential welds (on the centerline of the weXcr and at one point in the base material on each side of the weld).
Thickness measurements shall be taken at a minimum of two points adjacent to Lo for branch connection welds (one on the base material of the main run pipe, and'one on the base material of the branch connection).
If these measurements cannot be taken adjacent to Lo, the location of the measure-ments shall be recorded on the appropriate SwRI Examination Record.
SwAI Form QA 3-2
TP-ISI-307, Revision 0, Page 23 of 27 SOUTHWEST RES EAR CH INSTITUTE SwRI~T-600-31 Revision 12 June 1984 R
~
I NUCLEAR PROJECTS OPERATING PROCEOURE, Page 20 of 24 Screen distance calibration for this examination shall be con-ducted in accordance with Paragraph 6.3.1.
These measurements shall be recorded on the appropriate SwRI Examination Record.
7.5.2 Base Material Lamination Scan Before the sr.".'.-"-beam o.xaminat'on, a..aminat'on scan sing longitudinal save shall be performed.
This scan shall cover as much as prac-tical of the area through which the angle-beam is later to be passed.
The lamination scan shall be conducted as follows:
(1)
Screen distance calibration for this examination shall be conducted in accordance
~ -h Paragraph 6-3.1.
(2)
Scanning sensitivity shall be as required to maintain the first back reflection at an amp'itude of between 50% and 90% of FSH..
(3)
To record an intermediate indication, a back reflection signal shall be obtained from an indication-iree area and the instrument gain control adjusted until this signal is at 75% KX of FSH; record the intermediate indication when its amplitude is equal to the remaining back reflection.
If total loss of back reflection accompanies the inter mediate
- echo, the area of total loss of back reflection shall be recorded on the appropriate SwRI Examination Record.
EXCEPTION A base material land.nation scan need not be conducted on components which have received a lamination scan during a previous examination and laminar reflectors were not recorded E
7.6 Examination of Circumferential and Lon itudinal Butt Welds in
~Pi ~in 7.6.1 An le-Beam Examination for Indications Parallel with the Weld Angle-beam examinations for circumferential welds shall be accom-plished using the required refracted shea~ave from both sides.of the weld.
For this'xamination, the sound-beam shall be directed perpendicularly into the weld to detect indications parallel with the weld.
Calibration for these exami-nations shall be in accordance with Paragraphs 6.3.2 and 6.3.4.
Angle-beam examinations for longitudinal welds shall be accom-plished using the required refracted shea~ave from both sides of the weld.
SwRI Form QA3-2
A
TP-ISI-307, Revision 0, Page 24 of 27
'OUTHWEST R ES EARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRX-HDT 600-31 Revision 12 June 1984 Page 21 of 24 For this examination, the sound-beam shall be directed perpendicularly into the weld to detect indicatioas parallel with the weld.
Calibration for this exami-nation shall be in accordance with Paragraphs 6.4.2 and 6.4.4.
7.6.2 Alternate Examination A shear-wave angle-beam examinat'cn shal'e conducted as required to assure complete coverage from both sides of the circumferential or longitudinal weld.
Any areas of the weld not receiving complete coverage from both sides shall be examined from one side of the weld with the required shear-wave(s) and a straight-beam longitudinal-wave applied to the surface of the weld crown "in the affected ar. as.
Calibrat'on for the longitudinal-wave search unit shall be in accordance with Paragraphs 6.3.1 and 6.3.3.
7.6.3 An le-Beam Fxamination for indications Perpendicular to the Weld A shear-wave angle-beam examination shall be conducted on each weld by placing the search unit on the weld with the sound beam directed into and parallel with the weld to detect indications perpendicular to the weld-The entire length and width of the weld shall be scanned with the search unit beam directed in this manner, once in a clockwise and once in a counterclock-wise direction.
For austenitic materials, the search unit shall then be placed on the base metal with the search unit sound beam directed tangentially into the weld at a 45'1.0'ngle.
The entire length of the veld and adjacent base material shall be scanned with the search unit beam directed in this manner on each accessible side of the weld.
The search unit shall then be turned 90'nd the scans repeated Calibration for these examinations shall be in accordance with Paragraphs 6.3.2 and 6.3.4 for circumferential welds, and Paragraphs 6.4.2 and 6.4.4 for longitudinal welds and branch pipe connection welds.
Geometric root ripple echoes occurring at the same metal path distance as flaws adjacent to the weld root are to be expected.
A flaw must be distinguished from root ripple by the greater echo amplitude of a flaw compared to the amplitude of the root ripple at the same location.
A flaw indication adjacent to the weld root tends to mask out several facets of the root ripple and travels along the baseline through the root ripple package.
7.6.4 An le-Beam Examination for Indications in Austenitic Base Material Per endicular to the Weld
':4 A shear-wave angle-beam examination shall be conducted on 1t of base material adjacent to each weld by placing the search unit on the base mate-rial with the
The base material within 1t of the weld shall be SwRI Foan QA3-2
TP-ZSI-307, Revision 0, Page 25 of 27 SOUTHWEST RESEARCH INSTITUTE SwRI-NDT-600-31 Revision 12 June 1984 NUCI.EAR PROJECTS OPERATING PROCEDURE Page 22 of 24 scanned with the search unit directed in this manner, once in a clockwise direc-tion and once in a counterclockwise direction.
Calibration for these examina-tions shall be in accordance with Paragraphs 6.3.2 and 6.3.4 for circumferen-tial welds, and Paragraphs 6.4.2 and 6.4.4 for longitudinal, welds and branch pipe connection welds.
F 7 Examination nf Butt Welds of Branch Connect'ons 7.7.1 Strai ht-Beam Examination of Welds A st aight-beam examination shall be per"ormed on the surface of the weld crown when possible.
Calibration for the straight-beam examination shall be in accordanc wi"h P agraphs 6.3.1 ~;.d 6.3.3.
An le-Beam Exam'nation for indications Paral al wi"h the
',gael '
shear-wave angle-beam ezamination shall be accomplished from the main run pipe side of the weld.
For this examination, the sound beam shall be directed perpendicularly into the weld to detect indications parallel with the weld.
Calibration for these examinations'hall be in accordance with Paragraphs 6.4.2 and 6.4.4.
7.7.3 An le-Beam Examination for Indications Per endicular to the Veld The angle-beam examination for indications perpendicular to the weld shall be the same as the examination described in Paragraphs 7.6.3 and 7.6.4.
7.8 Postexamination Cleanin Arrangements shall be made with the customer for postezamination removal of couplant materials.
8.
RECORDING CRITERIA Indications shall be recorded in accordance with the techniques outlined in the applicable revision of SwRI Nuclear Projects Operating Procedure IX-FE-117.
. Ultrasonic reflectors aroduring a resaonse areater thorn
~OX nf the rof~r-ence level shai>
na r~~orded on ~<<e appropriate SwRZ Ultrasonic ~zaminatxon zecorct and investigated.
" The end points of the indication as determined by 100%
DAC shall be recorded.
SwRI Form QA 3.2
TP-ZSZ-307, Revision 0, Page Zj f 27 SwRI-NDT-600-31 Revision 12 June 1984 Page 24 of 24