ML20070E193
| ML20070E193 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/30/1981 |
| From: | Sandra Walker SOUTHWEST RESEARCH INSTITUTE |
| To: | |
| Shared Package | |
| ML20067D329 | List: |
| References | |
| GL-81-04, GL-81-4, SWRI-NDT-600-3, NUDOCS 8212170094 | |
| Download: ML20070E193 (38) | |
Text
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A 9 SOUTHWEST RESEARCH INSTITUTE SwRI-NDT-600-3 NUCLEAR PROJECTS Revision 59 November 1981
- OPERATING PROCEDURE Page 1 of 38 l Tide MANUf. IETRASONIC ELufINATION OF PRESSURE PIZING LTI.DS I
EFFECUVITY AND AP9ROVAl.
Aewmon of mes procedure becarne effective on Ctnw rwisaans of me base docunwnt mov be effectae concurrentty.
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Acorove6s Wntten 3v Cate I fecamcas Review Care
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Ute *oalcung information mov be ussa for convemence. Cc7 st:en of tnis portion is .9at mandatory.
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SOUTHWEST RESEARCH INSTITUTE November 1981 A NUCLEAR PROJECTS CPERATING PROCEDURE Page 2 of 38 MANUAL ULTRASONIC EIAMINATION OF PRESSURE PIPING VEI.DS , _ _ _ _
SwRI-NDT-400-3 1.0 PURPOSE This procedure provides the technical information and detailed steps necessar/ to ensure a complete and accurate nanual ul:rasonic examination of pressure piping welds, and the adjar.ent base nacerial, in accordance with the applicable ASME Boiler and Pressure 7essel Codes.
2.0 SCOPE AND AP?t.ICATION Pressure piping welds and the adjacent base nacerial in the nominal thickness range of greater than 0.a to 5.0 inches shall be examined in accor-dance with this procedure.
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Manuel, contact, pulse echo, shear-wave angle-beam, and longitudinal-vave ~
straight-beam ultrasonic techniques shall be utilized for the examination of clad or unciad piping velds and adjacent base nacerial.
Welds to be er=m4ned shall be circumferential and longitudinal pipe velds and butt and fillet velds of support at:achments and branch pipe connect' ions as rpecified in the applicable SwRI Evamination Plan.
2.1 Aeolicable Docunents The following documents, as applicable, forn a part of this procedure:
(1) ASE 3 oiler and Pressure 7essel Code,Section II,1974 Edi: ion, with Addenda through Su=mer 1975, "lulas for Inserrice Inspection of Nuclear Power ?lant Components" (2) ASE 3 oiler and Pressure 7essel Code, Section 7, 1971 Edition, with Addenda through Su=mer 1975, "Nondestruc- )
tive Examination," with the exception of the following: 1 (a) Subparagraph T-533.1 of Article 5 to 3ec: ion 7 requires the basic calibration block for produe:1on material :hicknesses up to and including 1 inch to be 3/4 inch or ":." ?aragraph 5.3 of this proce-dure requires :he basic calibration block to be ei:her *:," so nore than 25* 1ess than ":," or
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i swr 1-NDT-600-3 l SOUTHWEST RESEARCH INSTITUTE Rev1, ion 59
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November 1981 NUCLEAR PROJECTS CPERATING PROCEDURE Page 3 of 38 closer in thickness to ^* oroduction material than the 3/4-inch alternate t. c.nass allowed by Arti-cle 5 for produe:1on mate. .a1 thicknesses up to and including 1 inch. This exception will assure a more accurate calibration than the Article 5 basic cali-bration block design allowed by Code.
(b) Subparagraph T-535.1 of Article 5 states that transfer (attenuation compensation) be accomplishsd between the production material and basic calibrs-tion block and a correction made for the dif fer-ence. Paragraph 7.5.1 of this procedure describes the method used to condue: at:enuation measure-ments. These attenuation sensurements shall be recorded and considered during analysis and evalua-tion of indications. No attempt shall be made by the examiner to compensate for o: served differences before or during the examinations.
(3) ASP.E Boiler and Pressure 7essel Code, See:1on II, 1974 Edi:ica vich Addenda :hrough Summer 1975 7elding and 3 razing Qualifications" (4) SwRI Nuclear Quali:7 Assurance Program Manual (NQAPM) 3.0 RIS?CNS!3ILI'"Y (1) The Director of :he Department of Engineering Services, Quali:7 Assurancs Systems and Engineering Division, shall be responsible for the preparatica, review, approval, and con:rol of this pro-cadure.
(2) The Project Manager shall be responsible for the implenentation of
- his procedure in accordance vi:h :he NQAPM specified in :he appli-cable SwRI Projac: Plan.
(3) The examiner shall be responsible for implementing the requirements of this procedure.
(4) The Manager of the Support and Administration See:1on of :he Qual-icy Assurance Systa=s and Enginsering Division. shall be respon-sible for storage of records generated in accordar.ca with :his procedure.
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SOUTHWEST RESEARCH INSTITUTE S al-set * * -3 Revision 59 November 1981 NUCLEAR PROJECTS OPERATING PROCEDURE 4.0 CODE AND p10CEDUltZ REOUI1"ET"S -
The requirements listad below shall be applied when performing annual .
ultrasonic = = 4 nations in accordance with this procedure. _
Raouirements Section .
1 (1) Weld types and configurations to be examined, 7.0 including thickness d*. mansions (2) Automatic defect alarm and recording 5.0 a equipment -
(3) Search unit vedges, shoes, or saddles 5.0 (4) ' Rotating, revolving, or scanning nachanisms ~ -
shall not be used - -
(5) Personnel certification 5.0 (6) ne examination surface or surfaces 7.0 (7) Surface finish 7.0 (8) Couplant 5.0 (9) Method used 2.0 ,
(10) Technique used 2.0 _ _,
(11) Calibration method and =eched of correlating 5.0, 6.0, indications with defects 3.0, 9.0 (12) Sennning 7.0 (13) Mode of transmission 2.0 (14) Type and size of search unit 5.0 (15) '~4 = tion frequency 5.0 (16) Examinations shall be performed on velds in -
their completed condition (17) Ultrasonic instr.: ment alig= ment 5.0 Swae co m os 3 2-
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NUC1.5AR PROJECTS OPERATING PROCEDURE - --
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g 5.0 PERSONNEL AND E0uu:u.a f 3.1 Personnel Carrification . . .;_ - -
l Personnel performing ensinations shall be certified in _ .
accordance with SWRI NQAP 11-1, "Special Process Control."
l 5.2 Reference 3 lock l Reference blocks used for screen distance calibration and verification shall be as follows:
(1) SvRI Ealf-Round (Sketch 1) _
(2) MS Type DC (Sketch 2) -- - - - - - - - - - - - - - - - ---- -
Ir4 (Skatets 3)
(3)
The ref erence block shall be of the sanPisTc~:ia erial-'as clier-~
production material; e.g., stainless steel or carbon steel.
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5.2.1
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Reference Block Selection Reference blocks shall be used as follows for screen distance-calibration: _ _ _ _ _ _ , _ _ _ _ _ . ___ ,
(1) Straight-Beas Screen 31ock Distance Block Tree Disension
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1.0*, 2.0" SwRI Ealf-Round, 1.0" l EJS Type DC, 0.5" or 1.0" l 1 72 . L.0" l 2.5", 5.0" SwRI Half-Round, 1.0"
$5 Type DC 1.0" Ir4 1.0" 10.0" IrJ 4.0" l t
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SOUTHWEST RESEARCH INSTITUTE - S$$ -'
November 1981 NUCLEAR PROJECTS CPERATING PROCEDURE Page 6 of 38 (2) Angle-Beam Screen Block Distance Block Tvee Dimension
- 2.0", 2.5", SwRI Half-Round 1.0" Radius 5.0" AWS Type DC 1.0" and 2.0" - - - . - . - -
Radii 10.0" SwRI Hal*-Round 1.0" Radius AWS Type DC 1.0" and 2.0" Radii Ir4 4.0" Radius 20.0" Ir4 4.0" Radius 5.3 3asic calibration Block for Circumferential, Longitudinal, Suecort Attachment, and 3 ranch Pice Connection Welds Side-drilled basic calibration hole reflectors, in accordanca_- -- - _ . . - .
vich Section 7 of the ASE 3 oiler and Pressure vessel Code, shall be placed in a block manufactured from material of the same or equivalent P number grouping as the production material as identified in Section II of the ASE Boiler and Pressure 7essel Code. P-=usbers F-1, P-3, P-4, and P-5 shall be considered equivalent for ene purposes of this examination. The calibration sacerisi shall be determined by the produe:1on piping =aterial to which the search uni:
1: pplied.
The basic calibration block thickness shall be determined by the :hickness of :he produe: ion piping material to which the search unit is l applied and Article 5 of Section 7. When a basic calibration block of the same thickness as the produe:1cn piping material is not available and where the
[ production piping material thickness is 1 inch or less, :he basic calibration j block thickness shall be no more :han 23I thinner :han the production material l thickness or shall be closer to the produe: ion sacerial thickness than the l 3/4-inch thick alternate calibration bicek allowed by Article 5.
Approved drawings of basic calibration blocks to be used in accordance with this procedure are in the applicable SwRI Examination Plan.
i 714e basic calibration blocks or blocks of essentially :he saca l curvature as the part to be examined may be used when contac: surf ace cur ra-tures are greater than 20 inches in diameter.
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Revision 59 November 1981
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NUCLEAR PROJECTS OPERATING PROCEDURE
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A single curved basic calibration block nay be used to estab- .
lish distance amplitude correction (DAC) curves for examinations on contact .' ! .~
surfaces in the range of curvature from 0.9 to 1.5 times the basic calibration' block diameter, when contact surface curvature is 20 inches in diameter or .
less.
The curvature of the nais run pipe shall be used to establish !.
the requirements for the basic calibration block curvature for the examination of support attachment and branch pipe connection velds. _
5.4 Search Units (1) The search unit size shall be selected according to the fallowing eable:
(a) Straight-Bean Nomin=1 ?roduction Material Thickness Nominal Search Unit Size -
l 2.0" or less 1/4" Round 1.0" to 3.0" 3/8" Round 2.0" to 4.0" 1/2" Round
. 3.0*'co 5.0" 3/4" or 1" Round.
(b) Angle-Beam Nominal Production M.aterial Thickness Nomical Ser.rch Unit Size 1.0" or less 1/4" x 1/4", 1/4" Round
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0.4" to 2.0" 3/8" x 3/8", 3/3" Round 0.75" eo 4.0" 1/2" x 1/2", 1/2" Round 2.0" to 5.0" 1/2" n 1", 3/4
- bund l (2) The exit point of the sound beam and the actual refracted l beam angle of shear-vave search units shall be decerni=ed on an I!7 block. The exit point shall be narked on the search unit wedge.
1 (3) The nominal search unit frequency for the enmination of carbon steel piping shall be 2.25 MHz.
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SOUTHWEST RESEARCH INSTITUTE swar-at-6*-3 Revision 59 November 1981 NUCLEAR PROJECTS OPERATING PROCEDURE
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- i. v (4) The nominal angle-beam shear-wave search unit frquency for = =4n= tion of austenitic piping shs11 be as follows: ----
Nominal Frecuency Search Unit Size
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2.25 Mz 1/4" Round, 1/4" x 1/4" 1.5 sz 3/8" Round, 3/8" x 3/8" 1.5 mz 1/2"'aound, 1/2" x 1/2" 1.5 MHz 3 /4" Round, 1/2 " x 1" (5) The nominal straight-beam longitudinal-wave search unit frequency for austenitic piping shall be 1.5 MHz or .
2.25 Ez.
(6) The longitudinal-wave search unit frequency for attenua-tion naasurements shall be 2.25 MHz to simulate a 1.5 sz shear mode, and a 5.0 MHz to simulata a 2.25 MHz shear mode.
(7) For m uination of circunferential piping velds, search unit wedges shall be fabricated to produce 45* 22* and 60* 2* refracted shear-waves.
(8) For, examination of longitudinal piping velds, support attachment velds, or branch pipe connection velds to piping, search unit wedges shall be fabricated to ;-educe. _
45* 2* refracted shear waves.
5.5 Ultrasonic Instrument The anminer shall select an appropriati ultrasonic instrument from the following:
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(1) Sonic F*S Mark I
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i (2) Sonic FTS Mark II (3) Sonic WA '.'. ark III i
i s.ae som CA 3 2*
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SOUTHWEST RESEARCH INSTITUTE 5 % 'n" ?9 November 1981 f NUCLEAR PROJECTS OPERATING PROCEDURE Page 9 of 38 11
$.6 Couplant (1) USP grade glycerine or deionized water (with or without wetting agent) shall be used when perforcing ultrasonic -
calibrations and examinations in accordance with this procedure.
(2) Couplant materials used for examinations shall be the same as those used for the calibration. -
(3) Light oil or other compounds, which in the opinion of the Project Manager provide adequate ultrasonic coupling, nay. - -
i be used upon concurrence of the section nanager respon-sible for the avsmination.
(4) All couplants other than deionized water shall be certi- - -
fled for sulfur concent and total halogans in accordance with ASW. D-129-M and ASTM D-808-63. Le residual amount of total sulfur or halogens shall not exceed 1* by weight. Deiotfixed water, when used, shall be supplied by the custcmer.
6.0 CALI3RA ION ME EOD ne complete ultrasonic ev=minatica system calibration shall be perforced prior to the examination. __
NO*ES The ~3L'ICT" control shall be naint sined in the "0" position during calibration and examination.
The nominal piping production caterial thickness shall be used to decernine the correct calibrar.on block and search units for the exauination of piping conponents which nay be thicker than the cominal pipe size and welded to the pipe. The Level II av=minar shall ensure that complete coverage of the thicker piping component is obtained. Additional calibration vee path positions and larger screen sizes nay be required to assure this coverage. The additional calibration vee path positions and larger screen size shall be used for the examination from the thicker component cud the nominal pipe side of the veld.
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SOUTHWEST RESEARCH INSTITUTE ' Tis 57' November 1981
[ NUCLEAR PROJECTS OPERATING PROCEDURE Page 10 of 38 11 The "FREQ MHz" control shall be turned to "1" when a 1.5 MHz search unit is used, "2" with a 2.25 MHz search unit, and; ,
with a 5.0 MHz search ur.it. --'
6.1 calibration for circumferential Butt W ids -
6.1.1 Straight-Beam Distance Calibration . .
The screen distance chosen shall be the shortest applicable size to include at least 1/4e beyond the thickest production sacerial to which the search unit is applied. - -
Observing back reflections from the applicable reference block, adjust the " MAT'L CAL," " RANGE," and " DELAY" controls to obtain the required linear sound path distance, displayed along the screen baseline.
Screen distance calibration shall be selected from the follow-ing sizes: 1.0", 2.0", 2.5", 5.0", and 10.0" .
6'1.2
. Angle-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.
Observing radius echoes from the applicable caference block, adjust the " MAT't CAL," "1ANGE,
- and "DELAT" controls to obtain the cequired linear sound path distance, displayed along the screen baseline.
W.a performing anMnations on unciad components, screen aiscances shall be selected frem the following sizes: 2.0", 2.5", 5.0", 10.0",
and 20.0".
When perforsing examinations on clad conponents from the unciad side, screen distances shall be selected from the following sizes: 2.0", 2.5",
5.0", and 10.0". Also, a 20.0" screen say be used with 60* examinatiers.
When a single instrument is used for both 45* and 60* exanina-tions, the screen distance calibration shall be conducted in the following sanner:
(1) The screen distance size shall be determined by the angle-beam search unit requiring the longer examination range.
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NUCLEAR PROJECTS CPERAy!NG PROCEDURE Page 11 of 28 (2) Posi: ion the 45* _2* search unit on the appropriate reference block and record all esference block entries as --
required, on the appropriace, "SwRI Sonie Inscrumerit-- ----
Calibracion Record.~
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(3) Position :he 60* 22* search uni: on che appropriace referenes block and, without changing :he "MAI'L CAL,"
" RANGE," or "DELA!" controls, :scord all reference block -
entries as required on the appropriate, ~~ swr.T Sonic . --
I:sc:ument Calibracion Recoed.~ - -- '- -
(4) No attempe shall be nade to compensate for any slight-delay difference observsd becseen 15
- _2* and 60* _2*
screen dis anca calibra: ions. This difference, if any, shall be considered when resolvi:g i: dica:icas.
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6 .1.3 S:: sight-Bean Distance Anoli:ude Correctica Distance-supli:ude correc:1cu shall be conducted by u:111:ing
, responses fr m the basic calibracion holes. _
6.1.3.1 ?redue:1on Macarial i lech or Less f.n "hickness (1) Position :he sc aigh: bean search uni: :s ebcal: -# =
response from the 1/;T hole.
(2) Adjus: inscrument gain :=ne:cis :o obeal: :he pri=ary reference response at an ameli:ude of SC: _.!: cf f211 screen height (75H).
D Oraw a se sigh: horizontal 11:e en the isst:4=en: scree:
ac the pri=ary referenes a=cli:ude :o extend a discance equal :o :he semical chickness of the pr:ductten = ace-rial.
(1) Sig=al moli:udes fer 1:dicacices scorded shall be referenced as a peresacage of this line.
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/ NUCI.E.AR PROJECTS OPERATING PROCEDURE Page 12 of 38 1l _
6.1.3.2 Production Material Greater Than 1 Inch in Thickness . _ . _ . - . . - . - - - - . .
(1) Position the straight beam search unit to obtain maximum- ' I response from the calibration hole producing the highest.
amplitude from the following: ~ ~ ' ~ ~~~- ~ ~
Hole
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1/4T 1/2T (if present) 3/4T (2) Adjust instrument gain controls to obtain the pri.sary reference response at 50% =52 of FSH and nark this amplitude on the screen. The gain controls shall not be adjusted once the pri=ary reference response has been established.
(3) Position the search unit to obtain naxi=um response from the remaining calibration holes and mark each amplitude on the screen.
(4) Join these points with a smooth curved line, the length ot' which shall extend 1/4t beyond the last qualified calibration point.
6.1.1 Angle-Beam Distance Amolitude Correction If a curvcd block is used, distance amplitude correction (DAC) curves for the amination of circumferential velds shall be constructed by utill:1ng the responses from the holes oriented perpendicularly to the axis of the basi: calibration block.
6.1.4.1 Unclad Material 1 Inch or Less in Thickness 45* and 60* DAC (1) Position 45* t2* search unit to obtain naxi=um response from the hole and vee path position producing the highesc __ _
amplitude fr:m the following:
Hole Vee-Path ?csiticus --. . . - - - - . - .
1/2; 2/8, 6/8, 10 /8 S AlForm QA 3 2
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November 1981 A' .
NUCLEAR PROJECTS OPERATING PROCEDURE Page 13 of 38 1l -
(2) Adjust instrument gain controls to obtain the primary reference response at 75: *5: of FSH and mark this -
amplitude on the screen. The gain controls shall not, be... , ._ . .
adjusted once the primary reference response has been ,
established. ,, ,
(3) Position the search unit to obtain maximum response from the remaining vee path positions and mark each amplitude , _ _, ,,,
on the screen. ..._ .
(4) Join these points with a smooth curved line, the length of which shall not extend more than 1/8 vee path beyond '
the last qualified calibration point.
, (5) Repeat steps (1) through (4) using a 60* 2* searth unit.
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, ..OTE ,
If the configuration of the veld is such that a combina-tion of a 45' t2' full vee path examination and a 60*~_2' 6/8 vee path examination covers the entire weld volume ~
from the side of the veld being examined, it will not be necessary to record indications detected beyond the 6/9 vee path with 60* t2' examination. - 2---- - - - '
EXCEPTIONS If the config.tration of the veld is such that the 60 * =2 '
search unit sound beam is not directed into the weld root on the straight pass, a 14/3 vee path calibration shall.
be accomplished with a 45* c2' search unit. Indications detected in the calibrated area shall be recorded.
If the configuration of the veld is such that a 45 ' 2*'
14/S vee path examination and a 60 * =2
- 10 /3 vee path.
examination fail to cover the entire veld volume, a'14/8 l ven path calibration shall be accomplished with bot.i a~
l- 45' t2* and a 60* =2' search unit and indications detected in the calibrated area shall be recorded.
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SOUTHWEST RES'EARCH INSTITUTE s u-*oT-6*-3 Revision 59 November 1981 NUCLEAR PROJECTS OPERATING PROCEDURE Page 14 of 38 km,n*
6.1.4.2 Unclad Material Greater Than 1 Inch 3ut Not over 3 Inches in Thickness - -- _ . - . . _2 45* and 60* DAC
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(1) Position the 45' *2* search unit to obtain sawfsum -
- response from the hole and the vee path position producing the highest amplitude from the following:
Hole 45' 7ee-Path Positions 1/4T 7/8, 9/8 3/4T 3/8, 5/8 (2) Adjust instrument gain controls to obtain the primary reference response at 75: c5: of FSH and nark this ampli -
tude on the screen. The gain controls shall not be adjusted once the primary reference response has been established.
(3) Position'the search unit to obtain naximum response from --
the remaining vee path positions and nark each amplitude on the screen.
(4) Join these points with a sacoch curved line, the length of which shall not estand note than 1/3 vee path beyond the last qualified calibration point.
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(3) Repeat steps (1) through (4) with a 60* t2' search unit utilizing the following vee path positions:
Hola 60* Vee-Path Positicas
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1/4T 7/8 3/4T 3/8, $/8 -
ZICIPTIONS If the configuration of'the weld is such that the 65* t2*
full vee path av=mination fails to cover the entire weld volume, a 9/8 vee path calibration shall be accomplished with the 60* 22* search unit.
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Revision 59 November 1981 h NUCLEAR PROJECTS OPERATING PROCEDURE - -~
,, *, Q Page 15 of 38 If the configuration of the weld is such that the 60* 2* _ . . _ , _ _ ,
search unit sound bqam is not directed into the weld ~7" root, a 13/8 vee path calibration shall be accomplished -
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with a 45
- 2* search unit. ~~~
6.1.4.3 Unclad Material Greater Than 3 Inches But Not over 5 Inches in .. .-
Thickness 45' and. 60* DAC
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(1) Position the 45 * =2* search unit to obtain saxinum ..
response from the hole and the vee path position produc- ,
ing the highese amplitude from the following:
Hole 45* Vee-Path Post:1ons .
1- . .
1/4T 7/8 3/4T 3/8, 3/8 -.
(2) Adjust instrunent gain control / to obtain the primary reference response at 75: t3: of 73'd and nark this
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amplitude on the screen. The gain controls shall not be adjusted once the primary reference response has been established.
(3) Position the search unit to obtain mavd- response from the remaining vee path positions and mark each amplitude on the screen.
(4) Join taese points with a smooth curved line, the length :
of which shall not ex:and note chan 1/3 vee path beyond the last qualified calibration point. :
(3) Repeat steps (1) through (4) with a 50* t2* search unit utilizing the following vee path positions:
1 ... :-
Hola 60* 7ee-Path Positions i 1/4T 1/8 I 3/4T 3/8, 5/8 !
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uv November 1981 NUCLEAR PROJECTS OPERATING PROCEDURE Page 16 of 38 6.1.4.4 Clad Material Greater Than 0.4 Inch But Not over 5 Inches in Thickness (Examined From Unclad Side) ;
45* and 60* DAC -
(1) Pnsition the 45* $2' search unit to obtain =r4==
response from the hole and the vee path position produc-ing the highest amplitude from the following: -
Hole 45* Vee-Path Positions -
1/4T 1/8 -
1/2T 2/8 _
3/4T 3/3 (2) Adjust instrument gain controls to obtain the primary _
reference response at 75* 5*. of FSH and mark this amplitude on the screen. The gain controls shall not be -
adjusted once the primary reference response has been established. ,
(3) Position the search unit to obtain u v4= = tesponse from the remaining vee path positions and mark each anrplitude on the screen.
(4) Join these points with a smooth curved line, the length of which shall extend 1/8 vee path beyond the last qualified calibration point.
(5) Repeat steps (1) through (4) with a 60* t2* search unit utilizing the following vee path positions:
Hole 60* Vee-Path Positions
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1/4r 1/8 1/2T 2/8 3/4T 3/8 6.2 Calibration for Sucoort Attachment, 3 ranch Pine Connection, and Locritudinal Seam Welds 6.2.1 Straight-Beam Distance Calibration The screen distance chosen shall be the shortest applicable ,
si:e that includes at least 1/a t beyond the chickest production acerial to l which the search unit is applied. l
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Obserring back reflections from the applicable reference block, '
adjust the " MAT'L CAL," "3ANGE," and " DELAY" controls to obtain the required linear sound path distance, displayed along the screen baseline. -
Screen distance calibration shall be selected from the following screen sizes: 1.0", 2.0", 2.5", 5.0", and 10.0" -
6.2.2 Angle-Beam Distance Calibration '
The screen distance chosen shall be the shortest applicable size to include at least 1/8 vee path past the anticipated namination range. -
Obserting back reflections from the applicable reference block, adjust the " MAT'L CAL," " RANGE," and " DELAY" controls to obtain the required linear sound path distance, displayed along :he screen baseline.
Screen distance calibration shall be selected from the fol-icving screen sizes: 1.0", 2.0 * , 2.5", 5.0" and 10.0" .
6.2.3 Straight-Beam Distance Amolitude Correction '
Distance amplitude correction shall be conducted by utill:ing 1 responses from :he basic calibration holes. ,
l 6.2.3.1 Production Material 1 !=ch or Less in Thickness 1
I (1) Position the straight-beam search unit :o obtain naximum
)
response from the 1/2T hole. '
(2) Adjust instrument gain controls to obtain :he primary reference response at an ampli:ude of 50* _5* FSE.
(3) Dras a straight hori: ental line on the instrunent screen at the primary reference ampli:ude :o extend a distancs equal to the nominal thickness of :he production nate-rid. -
(/* ) Signal ampli:udes for indicacions recorded shall be e referenced as a percentage of this line. !
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6.2.3.2 Production Material Greater Than 1 Inch in Thickness (1) Position the straight-beam search unit to obtain maximum * -
response from the calibration hole producing the highest ~ ~ -
amplitude from the following: " ~
Hole -~
1/4T - -
1/2T (if present) 3/4T -
(2) Adjust instrument gain controls to obtain the primary rderance response at 50: 5 of PSE and mark thi-I amplitude on the screen. ~he gain controls shall not 'be -
adjusted once the primary reference response has been '
established.
, (3) Position the search uni: to obtain urimum response fr7m
- he remaining calibration holes and mark each ampli:ude . . . - - . _ . - . . . _ _ _ _ _ _ _ _ . _ _
on the screen.
(4) Join -J:ese points with a smooth curved line, :he length of which shall extend 1/4T beyond the last qualified calibration point.
s 6.2.4 Angle-Beam Distance Amplitude Correction l If a curved block is utilized, DAC curves shall be constructed I by acilizing the responses from the basic calibration holes oriented axially l with the basic calibration block.
6.2.4.1 Unclad Material 1 Inch or Less is Thickness 45* DAC I (1) Position the 45* 1* search uni: to obtain w r4 um response from the hole and vee path posi:1on producing the highest amplitude from the following: _ . _ _ _
l Hole 7ee-?aph Positions 1
1/2T 2/8, 6 /8, 10 /8, 14/3 l
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SOUTHWEST RESEARCH INSTITlTTi- Revision 59 November 1981 NUCLEAR PROJECTS OPERATING PROCEDURE 2 age 19 of 38
-(2) Adfast instrument gain controls ~ to'obtain the primary ' ~ ~ ~ ' - - "
reference response at 75% 5% of FSH and nark this , _ ,
! amplitude on the screen. The gain controls shall not be- ..
adjusted once the primary reference response has been ..
( es tablished.
(3) Position the search unit to obtain maximum response from the remaining vee path positions and mark each amplitude -
on the screen.
(4) Join these points with a smooth curved line, the length of which shall not extend more than 1/8 vee path beycud -
the last qualified calibration point.
EXCEPM ON l If the configuration of the weld is such that coverage of~
- he entire wsid voluna is at:ained with a 10/3 vee path calabiscien, a 14/8 calibration is not required.
6.2.4.2 Unciad Nacerial "reater Than 1 Inch 3ut Not Over 3 Inches in
- Thickness 45' DAC l
(1) Posicion the 45* :r2' search uni: :o obtain nam 1=um responsd from the hole and' he vee path position pro-dt...ing t's highest a=pli:nde frem the following: -
L g 7ee-Path Positions l- s 1/47 7/8, 9/8 3/ar 3/8, 5/3, 11/8 (2) Adjust instru=ent gain control; to obtain the pri=ary -
reference :esponse at 75% .3% of TSH and mark this amplitude en :he screen. The gain controls shall not be adjusted once the primary reference response has been established.
(3) Position the search uni: to obtain =aximum response from the remaining vee path positions and mark each anpli:ude on the screen.
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$j NUCLEAR PROJECTS OPERATING PROCEDURE Page 20 of 38
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(4) Join these points with a smooth curved line, the length of which shall not estend more' thas 1/8 vee path beyond - - -
the last qualified calibration point. '7 7- -
EXCEPTION
If the configuration of the weld is such that coverage of the entire weld volume is attained with a 9/8 vee path calibration an 11/8 calibration is not required.
6.2.4.3 Unciad Material Greater Than 3 Inches 3ut Noe over 5 Inches in Thickness . _ . .
45* DAC _ _ .
'(1) Position the 45* 2* siarch unit to obcain maximum .. _- - - __u _u. _
f response from the hole and the vee path position pro-ducing the highest amplitude from the following:
1/4T 7/8, 9/8 3/4T 3/8, 5/8 (2) Adjust instrument gain controls to obtain the primary reference response at 75: 23:: TSH and nark this amplitude en the screen.' The gain controls shall not be adjusted once the primary reference response has been established.
(3) Position the search unit to obtain sazimum response from. __ . _ . _ _ _ - _ _
the remaining vee-rath positions and mark each amplitude _ __
on the screen.
(4) Join these points with a smooth curved line, the length of which shall not extend more than 1/8 vee path beyond the last qualified calibration point.
a e +-w_ * - - --- - - - - - - .-------i--w -- - ----
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SOUTHWEST RESEARCH INSTITUTE ~~ l"^iMdf' T
November 1981 NUCLEAR PROJECTS OPERATING PROCEDURE
) Page 21 of 38 6.2.4.4 Clad Material Greater Than 0.4 Inch Jut Not over 5 Inches in Thickness (Examined From Unciad Side) .
} 45* DAC (1) Position the 45* t2* search unit to obtain. maximum- .
, response from the hole and vee path position producing the highest aplitude from the following: - -
Hole 7ee-Path Positions 1/4T 1/8 1/2: 2/8 -
3/4T 3/8 (2) Adjust instrument gain controls to sbcain the primary reference response at 75: 5% of FS.I and mark this amplitude on the screen. The gain controls shall not be adjusted once the pri=ary reference response has been established. . .
(3) Position the search unit to obtain saximum responst from the remaining vee path positions and nark each amplitude on the screen.
~ -~ ~
(4) Join these points with a smooth curved line, the length -~ ~~
- of which shan extend 1/8 vee path beyond the last qualified calibration point.
6.3 Secondarv DAC Calibrations Each point on the DAC curve shall appear at a minimum of 20% of FSH or a secondary DAC curve shall be constructed as follows:
~
(1) Secondary DAC curves shall contain at least 2 points.
1
) (2) The DAC point at 2 lines or greater in amplitude and l adfacent to a DAC point that falls below 2 lines of ampli-l cude shall be brought to the primary refersace level by l manipulating the gain controls. This point shall be I
marked on the instrument screen. The adjacent point (s),
previously at less than 2 lines of amplitude, shall be sa:had on the screen. Each of the points shall be cotr-nected with a smooth curved line. Se gain setting for chia secondary DAC cur 7e shall be recorded cn the appro-priate SwRI Inst a: cent Calibration Record.
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SOUTHWEST RESEARCH INSTITUTE U"*1%7' November 1981
{ NUCLEAR PROJECTS OPERATING PROCEDURE Page 22 of 38 EXCEPTIONS When the first DAC point is the only point above 2 lines of amplitude, the next highest point shall be brought co . . _ _ _ _ _ . _ . _ . . _
the primary reference level. This point shall be marked on the instrument screen. The other points previously_ar _
less than 2 lines of amplitude shall be marked on the screen. Each of the points shall be connected with a -
smooth curved line. The gain setting for this secondary DAC curve shc11 be recorded on the appropriate SvRI Instrument Calibration Record.
When the 60* _2' calibration consists of only a 2/8, 6/S, 10/8 vee path and no indications are to be recorded past the 6/8 vee path, it shall not be necessary to construct a secondary DAC.
6.4 Calibration Verifiestion 6.4.1 Sween Range 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:
( '. ) At the start of a series of examinations (2) With any substitution of search unit cable l (3) With any substitution of power source (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 t.se finish of a series of examinations (6) At any tima when, in the opinion of the examiner, there is doubt as to the validity of the calibration 6.4.2 Calibration Changes i (1) Perform the following if any point on the DAC curve has decreased nore than 20% or 2 d3 in amplitude, or any point on the sweep line has noved nore than $2 of full screen width:
$wM Form CA 3 2 l
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SOUTHWEST RESEARCH INSTITUTE !""d% U -'
November 1981
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T, NUCLEAR PROJECTS OPERATING PROCEDURE Page 23 of 38 l u
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(a) Void all examinations referring to the calibration .
in question and performed af ter the last valid - -
calibration verification. u.,, .
(b) Conduct a new calibration.
(c) Regw==f ne the areas for which examinations have been . . _ ._ . . ,
voided.
(2) Perform the following if any point on the DAC curve has increased in amplitude more than 20% or 2 d3:
(a) Correct the calibration.
(b) Reexamine all indications recorded since the last valid calibration verification.
(c) Enter proper values on a cew SwRI exa=1 nation _
record.
6.4.3 Recalibration
. Substitution of any of the following shall be cause for recali-beation:
(1) Search unit (vedge/ transducer)
(2) Couplant
~
(3) Ultrasonic instrument (4) Examination personnel 6.5 Calibration Data Calibration data shall be recorded on the appropriate, "SwRI Sonic Inst:nment Calibration Record," and shall include but cot be limited to:
(1) Serial number of the basic calibration block used (2) Type and serial number of the referenes block used (3) Type and serial number of the ultrasonic instrunent (4) Type, si:e, beam angle, and serial number of the ultrasonic search unie l .. - - .
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SOUTHWEST RESEARCH INSTITUTE [""I Z?'
November 1981 NUCLEAR PROJECTS OPERATING PROCEDURE Page 24 of 38
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(5) Nominal search unit frequency .
(6) Couplant (which shall be the same type as used in th. -
actual examination) j (7) Signature and ultrasonic certification level of the ;
examiner conducting calibration - -
(8) Date calibracea j (9)
I Time of calibration and verification (s) - ' ' -
1 7.0 EIAMINATION ^ -
7.1 Examination Aresa 7.1.1 circumferential and tongitudinal 3ue: Welds in ?ining Circumferential and longitudinal butt velds with a nominal --- --
thickness of greater than 0.4 to 5.0 inches shall be examined from the out-l sido surface of the pipe. Base nacerial shall be examined for a distance of it '
f rom the fusion line on each side of the weld. '
Longitudinal welds shall be examined along the entire length of !
the veld during the preservice examination.
Longitudinal welds shall be examined for 12 inches from the fusion line of the intersecting circumferencial veld during insec rice examinations. ,
7.1.2 3ue: and ?illet 7 elds of Suceor: Attachments and 3 ranch Piee !
Connections ,
3utt and fillet velds of support attachments and branch pipe !
connections in pressure piping greater than 0.4 up to a naximum of 5.0 inches l nominal chickness shall be examined from the outside surface of the pipe. l
. - . - ---..--.-p 34se nacerial shs11 he examined for a distance of it from the fusion line on the pipe Jide of the veld.
7.2 surface condition The contact surf aces shall be free from veld spatter, rougn-ness, or other conditions which interfere with free novement of the search unit ;
or inpair the transmissica of ultrascund.
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SOUTHWEST RESEARCH INSTITUTE U "Is W '
November 1981 NUCLEAR PROJECTS OPERATING PROCEDURE Page 25 of 38~
7.3 Indication Length Zero Reference (Lo) Location
~
Areas to be examined in accordance with this procedure shsIl have an "Lo* marked in accordance with the applicable revision of SwRI Proces-dare II-FE-103. .
7.4 Scanning Parameters - -
When practicable, scanning shall be performed at a minimum gain: ;;
setting of 2 times the referenca level sensitivity.
~
Instrument gain setting for scanning shall be determined on the basic calibration block as follows for each primary reference level utilized:
(1) With the instrument at the pri=ary reference level, manip-ulate the search unit on the basic calibration block to obtain a signal frem a calibration reflector (side-drilled hole) of 40: FSH. -- ---
f (2) Add 6 dB of gain by adjusting the fine gain control only.
Observe the signal amplitude. _.
(3) Add 6 d3 of gain by adjusting a combination of both fine l and coarse gain controls. Observe the signal amolitude.
l (4) Add 6 d3 of gain by manipulating the 6 d3 switch, if present. Observe the signal amplitude.
(5) Choose the nethed above which yields a signal response closest to 80: FSH.
~ -- ~
(6) he =et..od chosen shall then be used during the valid l calibration period for all scanning at 2 times the_
reterence level sensitivity. -
The examinar shall ensure that the signal response of the method chosen is within n2 d3 of SO: FSH, and record this amplitude and nethod l on the "SwRI Sonic Instrument Calibration Record."
Instrument gain settings for scanning shall be recorded on the appropriate SwRI Examination Record.
7.4.1 Scanning I Scanning overlap shall be a 21 4-"" of 10% of the search unit j piezeelectric element dimensica perpendicular to the direction of scan. Scan-ning performed in a direction perpendicular to the weld shall be adequate to examine the weld and it of base material from the fusion line of the weld.
l -. - _.
s l Swat Form cA 3-2 ft l
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1 SOUTHWEST RESEARCH INSTITUTE '10'nT-'
November 1981 i NUCLEAR PROJECTS OPERATING PROCEDURE Page 26 of 38 The search unit movement rate for scanning shall not excesd .
6 inches per second. -
7.5 Lamination Scan. Attenuation and Thickner2 Measurements .
7.5.1 Longitudinal Attenuation Measurements A straight-beam search unit as described for attenua. ion maa-surements (Paragraph 5.4) shall be placed on the appropriate tasic calibration block. Obtain a backwall reflection, setting this signal between 50% and 90%
of TSH. Record the signal amplitude and instrument gain settings on the appropriate, "SvRI Sonic Instrument Calibration Record." Adjust the instrument gain controls to display the next backwall reflection at the same amplitude at which the preceding backwall reflection was recorded. Record the signal ampli-tude, instrument gain settings, and the d3 dif fersuca required to obtain the adjacent backwall reflections at an equal amplitude.
Place the straight-benft search unit on the examination surface and determine the d3 difference required to,obtain signals of equal height frem two adjacent backwall reflections. Record this d3 difference otr th"e appropri-ate SvRI Examination Record. The search unit for attenuation measurements shall be placed adjacent to Lo en the base seterial away leem the heat-af f ected
- ene (HAZ). If attenuation measurements cannot be taken adjacent to Lo, the location of the sessurements shall be recorded on the appropriate SwRI Examina-tion Record. Measurements shall be taken at least at the following locations:
(1) ?eo positions for circumferential velds, one on each side of the veld (2) ?eo positions for lengitudinal velds, one on each side of the veld (3) One position adjacent to La on the sain run pipe base sacerial for support attachment and branch connection velds NOTE Attenuatica amasurements shall not be conducted for longi-tudinal, support attach *4ent, or branch connection velds if sensurements have been conducted in the applicable piping base
(
material.
l No attempt shall be made to take attenuation =easurements on i clad piping.
S.As Form CA 2 2 l
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l SvRI-NDT-600 SOUTHWEST RESEARCH INSTITUTE Re,1sion 59 -
i November 1991 ,
1 NUCLEAR PROJECTS OPERATING PROCEDURE
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Page 27 of 38 l
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7.3.2 Base Material Lamination Scan -
l . .
( A lamination scan using straight-beam longitudinal-wave shall ,
u- r
! be performed before the angle-beam armaination. This examination shall cover as such as practical of the ares through which the angle-beam is later to be --
passed. Screen distance calibration for this examination shall be conducted in accordance with Paragraph 6.1.1 for circumferential velds and Paragraph 6.2.1 c; l for support attachment, branch connection, or longitudinal velds. Scanning I sensitivity shall be as required to maintain the first back reflection at an amplitude of between 50% and 90% of TSE.
t Intermediate echoes having an amplitude equal to or greater i chan 50% of the ini:ial back reflection and accompanied by a 50 loss of back reflection shall be recorded.
To record an intermediate indication, a back reflection signal shall be obtained from an indication free area and the instrustne gain control adjusted until this signal is at 75: 3% of FSH. Record the internediate indication when its amplitude is equal to 50% of the initial back reflection and accompaniad by a 50% loss of back reflection. If total loss of back relec-
- 1on accompanies the intermediate echo, the area of total loss of back reflec _ _ _
clon shr.11 be recorded on the appropriate SwRI Examination Record.
7.5.3 hickness Measurements In conjunction with the lamination scan, thickness seasurements shall be taken at a sinimum of three points adjacent to Lo for longitudinal and circumferential velds (en the centerline of the veld and at one point in the l
base sacerial on both sides of the veld). Thickness seasurements shall be taken at a minimum of two points adjacent te Lo for support attachment and ,
branch pipe connection velds (one on :he base material of the main run pipe, ,.
and one on the base sacerial of .he branch connection or support at:achmen:). -
If these sensurements cannot be taken adjacent to Lo, the location of the sensurements shall be recorded on the appropriaca SwRI Examination Record. __ __ _
l '
l Screen distance calibration for this examination shall be con-j due:ed in accordance with Paragraph 6.1.1 for circumferential velds and Para- ,
l graph 6.2.1 for suppor attachment, branch pipe connection, and longitudinal l velds. Measurements shall be taken by placing :he s::aight-beam search unit in i the appropriate position on :he examination surface and observing :he position i of the back wall reflection on the instrument screen. These naasure=ents shall l be recorded on the appropriata SwRI Examination Record.
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l SOUTHWEST RESEARCH INSTITUTE '%"o'n?'
November 1981 Page 28 of 38 q NUCLEAR PROJECTS OPERATING PROCEDURE l
1 7.6 Examination of Cireuaferentisi and Longitudinal Butt Welds in Pioins 7.6.1 Ansle-Bras Examination for Indications Parallel with the Weld Angle been examinations for circumferencial welds shall be accomplished using 45' *2' and 60* t2' refracted shear-vaves from both sides of
- the veld. For this examination, the sound-beam shall be directed perpendic-ularly into the veld to detect indications parallel with the weld. Calibration for these examinations shall be in accordance with Paragraphs 6.1.2 and 6.1.4 .
Angle basa anaf nations for longitudinal welds shall be accom-p11shed using a 45* 12' refracted shear wave from both sides of :he veld. For this examination, the sound-beam shall be directed perpendicularly into the veld to detect indications parallel with the veld. Calibration for this exami- t nacion shall be in accordance with ?aragraphs 6.2.2 and 6.2.1 7.6.2 Straight-Beam Weld Examinations A 45* =2* and 60* t2* angle-beam examination shall be conducted
~
as required :o assure complace coverage from both sides of :he circumferencial veld. Any areas of the veld not receiving complace coverage from both side's shall be examined f ca one side of :he veld, if possible, vi:h c 45* e2* and 60* 2* shear wave and a straight-beam applied to the surface of the veld crown in the affected areas. Calibration for the straight-beam search unit shall be in accordance with Paragraphs 6.1.1 and 6.1.3.
A 45* 2* angle-beam examination shall be conducted as required to assure complete coverage from both sides of the longitudinal veld. Any areas of the veld not receiving complete coverage from both sides shall be examined from one sfde of the veld, if possible, with a 45* _2* shear wave and a longi:udinal-vave applied :o the surface of :he veld crown in :he affected__ J areas. Calibration for :he longitudinal-vave search uni: shall be in accor-dance with Paragraphs 6.2.1 and 6.2.3.
7.6.3 Angle-Beam Examination for Indications Peryendicular to the -- --.._.
Weld - ------ - - - - -- - --
An angle-beam examination shall be conc'o::ed on each ve1~d'usiog- ~ ~ - -
~~~ --~
a 15* =2* shear wave. *his examination shall be condur.ced by placing the search unit on the veld vi:h the sound beam directed 'sto and parallel vi:h :he veld eo detect indications p.erpendicular to the veld. The search uni: shall then be turned 180* and the scan repeated. Calibra: ion for these examinations shall be in accordance vi:h Paragraphs 6.1.2 and 6.1.4 for circumferential welds, and ?aragraphs 6.2.2 and 6.2.4 for longitudinal welds.
Swal Perm Ca 3 :
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l SOUTHWEST RESEARCH INSTITUTE Revision 59 November 1981 t -D
,, , -] NUCl. EAR PROJECTS OPERATING PROCEDURE
_ Page 27 of 38 A-( _ _ . . _. . _ . _. _ . - - .
7.7 Examination of Butt and Fillet Velds of 3 ranch Pine Connectione .
l and Succort Attachments
. = :.
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=. .: = unr Kraminations from main run pipe side of clad pipirg, as specified in this procedure, shall be conducted ona.y on welda ~
~2 --
of " set in" type branch connections.
j 71=minations from main run pipe side of clad piping shall cot j be conducted on velded-en pipe supports or lugs.
j 7.7.1 Angle-Beam Examination fir Indications Parallel with the Veld An angle-beam aramf natiet. shall be accouplished using a 15' n2*
refracted shear-wave from the main run pipe side of the veld. For this examina -
tion the sound beam shall be directed perpendicularly into the veld to detect indications parallel with the weld. Calibration for these examinations shall --
be in accordance with Paragraphs 6.2.2 and 6.2.1 7.7.2 Straight-Beam Ermmination of Velds -
I A straight-beam examination shall be performed on the surface l of the veld crown when possible. Calibration for the straight-beam examina-t tien shall be in accordance with Paragraphs 6.2.1 and 6.2.3.
7.7.3 Angle-Beam E==sination for Indications Percendicular to the Weld An angle-beam examination shall be conducted on each veld using a 45* t2* shear-wave. This armninacion shall be condue:ed by placing the search unit on the veld with the sound beam direc:ed into and parallel wi:h the weld to detect indications perpendicular to the weld. The entire length of the ---.
weld shall be scanned with the search unit beam directed in -dis sanner. The search unit shall then be turned 180* and the scan repeated. Calibration for these av=minations shall be in accordance wi:h Paragraphs 6.2.2 and 6.2.1 7.8 Postexamination cleaning Arrangements shall be made with the customer for postexami- ,
natica removal of couplant sacerials. -
9.0 RECCRDING CRITIRIA _
i Indications beyond :he 6/8 vee path posi:1on shall :ot be recorded while condue:1ng 60* ====4n=tions calibrated in accordancs with Paragraph 6.1.1.1 when complete coverage of the veld volume is obesined with the 45
- search uni:
and :he 60* search unit sound beam is directed into the weld root on :he i straight pass. i ;
$.ae norm on.2 2
SOUTHWEST RESEARCH INSTITUTE U"*JE'n N -'
November 1981
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q NUCLEAR PROJECTS OPERATING PROCEDURE Page 30 of 38 Ultrasonic reflectors producing a response 50I or greater of the ref-erence level shall be recorded on the appropriate SwRI Examination Record.
Indications shall be recorded in accordance with the techniques outlined ~~
in the applicable revision of SvRI Procedure II-FE-117.
Indications producing a response 20% or greater of'the reference level and suspected by the examiner to be other than geometrical in nature shall be -
recorded and investigated by a Level II or Level III examiner to the extent-necessary to decer:mine the shape, identity, and location of the reflector. - - . - - . _ .
Inriications 100I or greater of the reference level sha'll'be investigated by a Level II or Level III examiner to the extent necessary to decernine the shape, identity, and location of the reflector.
Indications 20I or greater of the reference level investigated and found-- --
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to be other than geometrical in nature shall be reported to the custoner for evaluation.
~
Scanningelimitations shall be recorded. .
"- ~' ' ~ ~
9.0 EVALUATION -
Ivaluation of reportable indications shall be the responsibility of the --.
customer, or the customer's representative, and shall be conducted La accord- - - _ _ _
ance with ASME Boiler and Pressure 7essel Code,Section II, Article I'4A-3 COO. ~ ~ ~
The applicable year of the Code and Addenda shall be as. specified in Paragraph '~
2.1(1) of this procedure.
10.0 RECO E S The customer shall receive copies of documents generated in accordance with this procedure in the examination report.
~
Fernanent documents generated in accordance with this procedure sha 1 be stored and retained as a por. ion of the examination report. ~he examination report shall be stored by the Manager of the Support and A+mf 94 <tration Sec-tion, Quality Assurance Systems and Engineering Division, in the Data Storage Facility for the period specified by the contractual agreement with the customer.
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