ML17139C772
| ML17139C772 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 11/01/1984 |
| From: | SOUTHWEST RESEARCH INSTITUTE |
| To: | |
| Shared Package | |
| ML17139C765 | List: |
| References | |
| TP-ISI-309, NUDOCS 8412270412 | |
| Download: ML17139C772 (19) | |
Text
.PROCEDURE COVER SHEET P ENNSY LVANIA POWDER 6 LIGHT CO SUSqUEHANNA STEAi4l ELECTRIC STATION ANNUAL ULTRASONIC EXAMINATION OF AUSTENITIC THIN WALL PIPING FIELDS TP-ISI-309 Revision 0
Page 1 of 19 Effective Date
.Expiration pate Revl sed Exp ia ration Gate PROCEOURE TYPE:
PORC MON-PORC Alteraate Review ggiQC QTc'td (if appl'.c ble)
Prepared by I
t Reviewed by Recommended:
ection Hjaa/Manager
. c)7 Superintendent oi Plant Date
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.POR FORH Ap-gA-101-1, Rev. 2, Page 1 of 1
TP-ZS I-309 Revision 0
Pae PRQCEDURE DEVIATION DEVIATIONNO.
2 Susquehanna, Unit 2 OKVIATIQNPAGE NQ.:
OATE REQUESTED-'
2 18 October 1984 QF:
g PRQCKOUREIREVISION NQ.
ISI g
800-36i30 EVLMINATIONPERIOD:
1984 SECZIQNISI AFFECT cDL 2,3,5 and 8
PROCEDURE PAGESI:
2,5 and 15 gVAIINATIQNAREAISIA~sD; Manual ultrasonic examination of sustenitic thin wall piping welds THIS DEViATION SuPWCZDES DEVTCTION 1
QEvIATIQNr Itie reooeered tftat tne oererlreorHer cncnen oerovv in me aoove orocerrrNe! revision oe ceviereo from aa tcxlovve ruse exac:
wercfnq ~ooeecr. acciconel cnrrere rnev ce rreecit necrrcsery]r
~ge Sect~~
2 ta aad 'as
<<aJ 'ws '
CQ hagJ.e~eam shear~ve and st~ght~eam longituifaal-wave, annual, cantac",
puls~cha ult~onkc techniques shall be ema3.oyed far ~>> war'ili g <<~rd 8x Lm&at~~ ~ w~ a 'p~g c "~a ~t~
on a
ancL brszLcn caanec ~ buc waLds Sac'ning the adfacanc base mater&
w~
a 0. 1-ta 0.4-hch nam&LL thichxess range and with a nominal Wrete oi 4.0 aches or greater shall, be exmdnad as specMied Qx the appL'cable SwRX ~~at'on Plan.
Change (1) and the f~~c paragraph of (2) or Sec=~an 3 ta read as fa'ws:
(1) hZK. Sailer
- and, P essura Vessel
- Cade, Sec" on Z, 1980 "-rU.tmn, Wth
~ Addenda through %inter
- 1981, "Rules =ar Inservice Inspection or
!Iuclear Power P~~t Components" W
1k' Qk (2)
ASIDE BaW~er and P~suxe VesseL, Cade, Sec='on V,
1980 "-'d'" on, with Addenda though %later 1981, "Hondesz~c""ve "=raminatmn," WM the axceyc~ oi the fallawhxg:
'USTIRCATIQNr R~ aange ieneceaaey axs vrnecnie imaaecr to ecccrnoran IoIe acrrlrioner sneer it necamarylr C
cr Changes made at the r APPROVED Nuctear SUpporg
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Tltl.
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- /Uue~~~k Signature:
Date: f-'~
eauest of Pennsylvania Power
& Light Company SwRI FOR Ivl~
TP-ZSZ-309, Revision 0, Paae 3 of l9 SwRI-HDT 800-36/30 Deviation 2 October 1984 Page 2 of 2 Change 5-6 to read as follows:
~Cu ~n (l)
USP-grade glyce'rine or deionized water (with or without wetting agent) shall be used when performing ultrasonic calibrations and examinations in accordance with this procedure.
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ct halogens in accordance with AS'Qf SD-l29 and ASM SD-808 of Article 24,Section V.
Only ultrasonic couplants meeting PP&L requirements shall be used.
~~a follg.'n- = rais aha ot be
.cnc.vu added const tuents of t'"e material:
silver, zinc, cadium, mercury, gallium, indium> lead,
- cin, a senic,
- antimony, and bismuth-De'oui=ed vater, vhen used, shall be suppl'ed by th
- customer, Other compounds, which in the opinion of the Level XZ or ZZI examiner provide adequate ultrasonic coupling, may be used upon concurrence of he Project '.dna~sr responsible or the xamination.
(4)
Couplant materials used for lamination shall be the same as used for the calibration.
Add the following as the fourth paragraph under Section 8:
The investigation of ultrasonic reflectors uot readily attributable to geometry should be accomplished, but not limited to, taking profiles and additional thickness 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.
SOUTHWEST RESEARCH INSTITUTE NUCI.EAR P ROJ ECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revision 30 June 1984 Page 1 of 16 MANUAL ULTRASONIC EGQiINATION OF AUSTENITIC THIN MALL PIPING OLDS EFFECTIVITYANO APPROVAL Revision af this rtraaedure bereme effeative an 30 he effeative aancurrentiy, Aoorovals Date Technical Review Date 4LJ?i'd%)f~
Manager of CLA.
Date aant Director 7
rv The following information may be used for convenience.
Co letion of this portion is not mandatory.
I Deviation No.
Date Effective Procedure Section(s)
Affected Notes:
APPROVED Nuclear Support Date:
go Title.
Iirgy'- IUIfr'LEkA I Al/Ji Gi/ PO8 Signature:
TP-ISI-309, Revision 0, Page 5 of 19 SOVTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revision 30 June 1984 Page 2 of 16 MAKJAL ULTRASONIC EXAMLVATIONOF AUSTENITIC THIN WALL PIPING WELDS SwRI-NDT-800-3 6 1 ~
PURPOSE This procedure provides the technical information and detailed steps neces-sary to ensure a complete and accurate manual ultrasonic examination of welds and adjacent base material of austenitic thin wall piping in accordance with the applicable APEAK Boiler and Pressure Vessel Codes.
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- tact, pulse-echo u'trasonic techniques shall be employed for thin wall piping weld examinations-Thin wall piping circumferential, longitudinal, and branch connection butt welds including the adjacent base material in a 0.1-to.
0.4-inch ncminal thickness range shall be ezsminef as speclf e
in the appli-cable gwRZ Eaaminaticn Plan.
3 ~
APPLICABLE DOUJME'.NTS (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)
ASME Boiler and Pressure Vessel
- Code,Section V, 1980 Edition, with Addenda through Winter 1980, "Nondestructive Examination," with the exception of the following:
(a)
Figure T-546.1 of Article 5,Section V, requires the basic calibration block for the average weld thicknesses (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 25X less than t, or closer in thickness to the production material than the 3/4-inch alternate thick-ness allowed by Article 5 for production material thicknesses up to and, including 1 inch.
This exception will assure a more accurate calibration than the Article 5 basic calibration block design allowed by Code.
(3)
SwRI Nuclear Quality Assurance Program Mlanual (NQAPM)
SwAI Fofgn QA 3-2
TP-ISI-309, Revision 0, Page 6 of 19 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-3 6.
Revision 30 June 1984 Page 3 of 16 3.1 A licable Calibration and Examination Records SwRI NDTR Form No.
Revision Date 17-89 17-90 1I 17-19 17-18 17-37 8-1,9-80 8-19-80 7~10~80 12-1-83 7-31-75 2-18-80 4.
RESPONSIBILI~
The Director of the Department of Engineering Services, Quality Assurance Systems aad Eagineerin Division, shall be responsible for the preparation, rev'w, approve',
and control of this orocedure.
(2)
The Project Manager shall be responsible for the implementation of this procedure in accordance with the NQAPM in effect on the date this procedure is appr'oved.
(3)
The examiner shall be responsible for implementing the requirements of this procedure.
(4)
The Manager of the Support and Administration Section, Quality Assurance Systems and Engineering Division,'hall be responsible for storage of records generated in accordance with this procedure.
5.
PERSONNEL KtD E UIPMENT 5.1 Personnel Certification Personnel performing examinations in accordance with this procedure shall be certified in accordance with SwRI NQAP 11-1, "Special Process Control.
5.2 Reference Block Reference blocks used for. screen distance calibration and verifi-cation shall be of the same basic material as the production material, stain-less steel, and shall be one of the following (1)
SwRI Half-Round, or (2)
AWS Type DC.
SwRI Form QA 3-2
TP-ISI-309, Revision 0, Page 7 of 19 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revision 30 June 1984 Page 4 of 16 5.3 Basic Calibration Block Notches shall be 'placed in a block manufactured from material of the same specification, product form and heat treatment as one of the materials being joined.
Calibration reflectors shall be notches machined on the outside ann inside surzaces oz the oasic ca.- -r-t'on o oc.c.
.:.e notche sh 11 be 'n accordance with approved drawings of the basic calibration block contained in applicable SwRZ Examination Plan.
The basic calibration block thickness shall be determined by the thickness of: the production piping material to which the search unit is apoli d
and Article 5,Section V.
When a oasic calibration block oi the same thickness as the production piping material is not available, the basic calibration block thickness shall be closer to the production material thickness than the 3/4-inch thick alternate basic calibrat'on block allowed by Art'cle 5
~
Plat basic calibration 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 calibration block shall be used to establish dis-tance 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 diam-
'ter, when contact surface 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 pipe connection welds.
5.4 Search Units (1)
Search units shall be selected according to the following:
(a)
Strai ht-Beam Lon itudinal-'ave Nominal Search Unit Size 1/4" x 1/4" Aerotech (Diamond)
Gamma
- HSWS, 1/4" Round Dual Element (b)
An le-Beam Shear-Wave Nominal Production terial Thickness Nominal Search Unit Size 0.1" to 0.4" 0.2" to 0.4" 1/4" x 1/4", 1/4" Round 3/8" x 3/8", 3/8" Round SwRI Form QA 3-2
TP-ISI-309, Revision 0, Page 8 of 19 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-HDT-800-36 Revision 30 June 1984 Page 5 of 16 (2)
The exit point, of the sound beam and the actual refracted beam angle of shear-wave search units shall be determined on an IXV reference block.
The exit point shall be marked on the search unit wedge.
(3)
The nominal shear-wave search unit frequency shall be as "ol'ows:
.'tominal Preauenc Search Unit Size 2.25 aKz
- 1. = MHz 1/4" Round, '/'" x 1/4" 3/8" Round, 3/8" x 3/8" (4)
Search unit wedges shall be fabricated as required to pro-duce a 45'2'efracted shear-wave.
usher angles may be used to supplement the examination.
(5)
A. 1/4" round longitudinal-wave dual element search unit
'hall be used at a frequency of 2.25 MHz or 5.0 MHz.
An Aerotech (Diamond) 1/4" x 1/4" Gamma MSNS search unit shall be used only at a frequency of 5.0 MHz.
5.5 Ultrasonic Instrument The examiner shall use a Sonic PTS Mark I ultrasonic instrument.
Each instrument shall be aligned and shall display a valid alignment cali-bration tag as required by NQAP 10-1.
5.6
~Con lant (1)
USP-grade glycerine or deionized water (with or without wetting ageat) shall be used when performiag ultrasonic calibratioas aad examinations in accordance with this procedure.
(2)
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.
Deionized water, when used, shall be supplied by the customer.
(3)
Couplaat materials used for examination shall be the same, as used for the calibration.
SwRI Form QA3-2
TP-ISI-309, Revision 0, Page 9 of 19
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SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revision 30 June 1984 Page 6 of 16 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 NQAP 10-1.
6 ~
"A I3RATION iKTHOD 6.1 Instrument Linearit Ultrasonic instrument linearity shall be verified onsite as a
minimum within one day befoxe and one day after examining all welds to be examined with an snin Ours g
n 'utaga o
eve h aa o
is less, in accordance with Paragraphs 6.1.1 and 6.1.2.
Additionally, if a calibration verification do s not =eat "he " q '"=-
nts o'.3 ~" of this pr"-
- cedure, an instrument linearity check must be performed prior to continuing examinations.
Data required shall be recorded on the SwRI Instrument Lineax'ity Verification Record and the sheet number shall be referenced on each applicable SwRI Sonic Instrument Calibration Record.
NOTE The setting of the damping control shall be recorded on REMARKS on the SwRI Instrument Linearity Verification Record.
The damping control shall be in the same position during linearity verification, calibrations, and examinations or a new linearity verification shall be performed.
6.1.1 Am litude Linearit (1)
Position a shear>>wave search unit on a calibration block to obtain indications from the 1/2T and 3/4T holes (the cali-bration block for. amplitude linearity verification may not be the basic calibration block specified for calibrating distance amplitude correction curves in accordance with this procedure).
(2)
Ad+st the search unit position to give a 2:1 ratio between the two indications, with the larger indication (1/2T hole) set at 80% of full screen height (FSH) and the smaller indication (3/4T hole) set at 40X of FSH.
e (3)
Vithout moving the search unit, adjust the instrument sensi-tivity (gain) to set the larger indicat'on to 100X of FSH and record the amplitude of the smaller indication, esti-mated to the nearest 1X of FSH.
SwRI Fotm QA 3-2
TP-ISI-309, Revision 0, Page 10 of 19 SwRI-NDT-'00-36 Revision 30 June 1984 I
SOUTHWEST RESEARCH INSTITUTE R
I 'UCLEARPROJECTS OPERATING PROCEDURE Page 7 of 16 (4)
Successively set the larger indication from 100X to 20%%d of FSH in 10X increments (or 2 dB steps if a fine control is not available);
observe and record the smaller indication estimated to the nearest 1X of FSH at each setting.
The reading must be 50X of the larger amplitude within 5X of
.-FSH.
6.1.2 Ampler.tude Control Linearity (1)
Position a shear-wave search unit on a calibration block to obtain ~meum ampl'ude from the ll2T hole.
- 2)
~ e e'nlthaout movi;ag i.N scarer:h uni - ) set t e i1dicatio tv t required percent oz FSH and increase or decrease the dB as
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speci=iec e'cw..ne est=-"ted sig"a'hal ae zecor"ec to the nearest 1" oz FSH and shall za'1 within the limits oz the following table:
Indication Set at X oi FSH
- dB Control
~Chan e".
Indication Limits X of FSH 80X.
80X 40X 20X
-6dB
-12 dB
+6dB
+12 dB 32 to 48X 16 to 24X 64 to 96X 64 to 96X
~nus denotes decrease in amplitude; plus denotes increase.
6.2 Calibration tion.
The ultrasonic calibration shall be completed prior to the examina-The REJECT control shall be maintained in the 0 position during calibration and examination.
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 or components which may be thicker than the nominal 'pipe size, examinations limited to one side of the weld or wide weld crowns.
The Level II or III examiner shall ensure that complete coverage of the examination area is obtained.
Additional calibration vee-path positions and larger screen sizes which may be required to assure this coverage shall be used for the examination from either side of the weld.
e SwAI Form OA 3-2
TP-ISI-309, Revision 0, Page ll of 19 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revision 30 June 1984 Page 8 of 16 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 FREQ Mi z control shall be turned to 1 when a 1.5 NHz search unit is used, to 2 with a 2.25 ~ search unit, and to 5 with a 5.0 8Hz search unite The type and length of the search unit cable shall be recorded on the SwRI Sonic Instrument Calibration Record.
I I
be filled in.
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6.2.1 Temoerarure The temperature of the calibration block shall be within 25'P of the component temperature and shall be recorded on the SwRI Sonic Instrument Calibration Record'r the initial calibration and each ver'fication.
The surface temperature of the component to be examined shall be taken prior to performing an examination and shall be recorded on the appli-cable SwRX Examination Record.
6.3 Strai ht-Beam Distance Calibration (1)
The screen distance chosen shall be the shortest applicable size to'include at least 1/4t beyond the thickest production material to which the search unit is applied.
(2)
Attach a delay line shoe if a 1/4" x 1/4" Aerotech (Diamond)
Gamma iSWS search unit is used.
(3)
Position the straight-beam search unit on an appropriate reference block, observe the back reflections and set up the required linear sound path distance along the screen baseline.
6.4 An le-Beam Distance Calibration (1)
Select the shortest screen distance size that includes at least 1/8 vee-path beyond the'anticipated examination range.
(2)
Position the shear-wave search unit on an appropriate reference block, observe the radius echoes and set up the required linear sound path distance along the screen baseline.
SwRI Form OA3-2
TP-ISI-309, Revision 0, Page 12 of 19 SOUTHWEST RESEARCH INSTITUTE SwRI-NDT-800-36 Revision 30 June 1984 NUCLEAR PROJECTS OPERATING PROCEDURE Page 9 of 16 6.5 An le-Beam Distance Am litude Correction DAC curves shall be constructed from notches perpendicular to the axis of curved basic calibration blocks when examining circumferential welds.
DAC curves shall be constructed from the axial notches of curved basic cali-bration blocks for examinations of longitudinal welds and branch pipe connec-t'ons.
The DAC curve shall be constructed as follows:
Position the angle-beam search unit on the oasic calibration block to obtain maximum response from the vee-path position, selected fro the following, which produces the highest amplitude:
Vee-Path Positions
'/8, 8/8,
<2/8 (2)
Adjust instrument gain controls to obtain the primary reference response at 80X +5X of full screen height (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; 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 ~
6.6 Seconda DAC Calibration Each point on the DAC curve shall appear at a minimum of 20X FSH or a secondary DAC curve shall be constructed as follows:
(1)
Secondary DAC curves shall contain at lease 2 points.
(2)
The DAC point at the 8/8 vee-path position shall be brought to the primary reference level by manipulating the instru-ment gain controls.
This point shall be marked on the instrument screen.
The 12/8 vee-path position, previously at less than 20X of FSH, shall be marked on the screen and these points connected with a smooth curved line.
The instrument gain settings for this secondary DAC curve shall be recorded on the appropriate SwRI Sonic Instrument Calibration Record.
swRI Form QA3-2
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TP-ISI-309, Revision 0, Page 13 of 19 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revision 30 June 1984 Page 10 of 16 EXCEPTION When the 8/8 vee~ath position is set at the primary reference level, and the 12/8 vee-path position is belo~ 20X of FSH, a secondary DAC curve is not required.
6.7 Calibration Verification 6.7.1 Swee Ran e and DAC Curve Verification Sweep range calibrat"on shall be verified on
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the appropriate basic calibration block:
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(1)
AC the start of a ser'es o
examinations (2)
Substitution of search unit cable (3)
(4)
Substitution of power source 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 finish of a series of examinations (6)
Whenever the validity of the calibration.i5 in doubt 6-7.2 Verification of Calibration Reflectors at Scannin S eed The examiner shall verify the presence of the calibration reflector at scanning speed when required.
NOTE V
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:
"Calibration reflectors have been verified at scanning speed."
SwAI Farm OA 3-2
TP-ISI-309 Revision 0
Pa e 14 of 19 SOUTHWEST RESEARCH INSTITUTE SwRI-NDT-800-.36 Revision 30 June'1.984 R-
) P'UCLEAR PROJECTS OPERATING PROCEDURE Page 11 of 16 6.7.2 Calibration Chan es (1)
Perform the following if any point on the DEC curve has decreased more than 20X of PSH or 2 dB in amplitude, or if any point on the DAC curve has moved on the sweep line more than 5X of full sere n w'dth or 10X of the sweep division reading, "h'".."v"r 's g" (a)
Void all examinations referring to the calibration in question and performed after the last, valid calibra-tion verification.
(b)
Conduct a new cal'oration.
(c)
Reexamine 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 20X or 2 dB:
(a)
Correct the calibration.
(b)
Reexamine all indications recorded since the last valid calibration verification.
(c)
Enter proper values on a new SwRX Examination Record.
6.7.3 Recalibration tion:
Substitution of any of the following shall be cause for recalibra-(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
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TP-ISI-309, Revision 0, Page 15 of 19
. SOUTHWEST R ES EAR C H INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRX-NDT-800-36 Revision 30 June 1984 Page 12 of 16 7
EXAMINATION 7.1 Examination Areas 7.1.1 Lon itudinal and Circumferential Butt Welds -in-Pinin This procedure shall apply to ultrasonic examination from the out-side surface of pressure piping longitudinal and circumierential welds and adjacent base material 0.1-to 0.4-inch nominal thickness.
Scanning of the weld and base material shall be adequate to ensure complete coverage "or i3 c ircm "he inside suriace oi the pipe.
<<e base mate-rial shall be examined for a distance of 1 inch -as measured from the outside surface iusion line on each side oi the weld.
0 Class 1 longitudinal welds shall be examined along the entire length of the weld during the preservice examination and for at least one pipe-diameter length or 12 inches, whichever is less, from the fusion line of the intersecting circumferential weld during inservice examinations.
Class 2 longitudinal'elds shall be examined for at least 2-1/2t length from the fusion line of the intersecting circumferential weld during preservice and inservice examinations.
7.1.2 Branch Pi e Connection Butt Welds "Set in" type branch pipe connection butt welds in pressure piping of 0.1-to 0.4-inch nominal thickness dimensions shall be examined ultra-sonically as described herein.
Examination of "set in" type branch pipe connection butt welds shall be performed from the outside surface of the main run pipe.
Base material of the main run pipe shall be examined for a minimum distance of 1 inch from the weld fusion line.
7.2 Surface 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-7.3 Attenuation No attempt shall be made to determine differences in the acoustic properties between the basic calibration block and the production material which would result in an instrument gain change.
SwAI Form QA3-2
TP-ISI-309, Revision 0, Page 16 of 19 t
SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revision 30 June 1984 Page 13 of 16 7.4 Indication Len th Zero Reference (Lo) Location Areas to be examined in accordance with this procedure shall have a Lo marked in accordance with the applicable revision of SwRI Nuclear Projects Operating Procedure IX-FE-103.
7.5 Scanning i]hen practical, scanning shall be performed at a minimum gain setting five times the reference level sensitivity.
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~an pu Instrument gain setting for scanning shall be deterred on the
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search unit on the basic calibration block to signal of 20X FSH from a calibration reflector (2)
Add 14 dB of gain by util'zing the 14 dB switch (ii pre-sent),
the fine gain control, or a combination of the fine and coarse.gain controls and choose any method which yields a signal response within +2 dB of 100X 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 five times the reference level sensitivity.
Scanning overlap shall be a minimum of 10X of the search unit piezoelectric element dimension perpendicular to the direction of scan.
The search unit movement rate for scanning shall not exceed six inches per second.
7.5.1 Base Material Lamination Scan
)
Before the angle-beam examination, a lamination scan using longi-tudinal-wave shall be performed.
This scan shall cover as much as practical 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'hall be conducted in accordance with Paragraph 6.3.
W SwRI Farm QA 3-2
TP-ISI-309, Revision 0, Page 17 of 19 SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revisioa 30 June 1984 Page 14 of 16 (2)
Scanniag sensitivity shall be as required to maintain the first back reflection at an amplitude of between 50% and 90%
of FSH.
(3)
To record an intermediate indication, a back reflection sig-nal shall be obtained from an indication-free area aad the instrument gain control ad"'usted unt th's signal is at 75%
~5% of FSH; record the intermediate indicat'on when its amplitude is equal to the remaining back reflection.
Zf total loss of back reflection accompanies the intermediate
- echo, the area of tota1 loss of back ref'ect'on sh-11 be recorded on the appropriate SwRZ Examination R cord.
EXCEPTION A base material '"miaation scan need aot be conducted on components which have received a lamiaatioa scan during a previous examinatioa and laminar reflectors were aot recorded-7-5.2 Thickness Measurements Thickness measuremeats for circumferential and longitudinal welds shall be taken at a minimum of three points (on the centerline of the weld and at oae point in the base material on both sides of the weld).
Thickness mea-surements for branch pipe connections shall be taken at a minimum of two points (oae poiat in the base material on the main run pipe side of the veld and one point on the branch connection side of the weld).
These measurements shall be recorded on the appropriate SwRI Examination Record.
Screen distance calibration for this examination shall be conducted in accordance with Paragraph 6.3.
7.5.3 An le-Beam Examination for Xndications Parallel with the Weld A shear-wave angle-beam examination shall be accomplished from both sides of the circumferential or longitudinal we1d and from the main run pipe side of the weld for branch pipe connections.
The sound beam shall be directed perpendicularly into the veld to detect indications parallel with the
-weld.
The entire weld and base material for a distance of 1 inch from each side of the weld fusion line (1 inch of base material of the main run pipe for branch pipe connections) shall be examined-Calibration for these examinations shall be in accordance with Paragraphs, 6.4 and 6.5.
Other angles may be used as referenced ia Paragraph 5.4'wAI Form QA 3-2
TP-ISI-309, Revision 0, Page 18 of 19 SOUTHWEST RESEARCH INSTITUTE SwRI>>NDT-800-36 Revision 30 June 1984 NUCLEAR PROJECTS OPERATING PROCEDURE Page 15 of 16 7.5.4 An le-Beam Examination fox Indications Per endicular to the Weld A shear~ave angle-beam examination shall be conducted on the weld aad ad)acent base material by placing the search unit on the weld and base mate-rial surface with the sound beam directed into the weld and base material in an axial orientation with respect to the weld to detect indications perpendicular or transverse to the weld.
The entire length of the weld and base material for a distance of 1 inch from each side of the fusion line (1 inch of base material oz the main run pipe for branch pipe connections) shall be scanned wi,th the search unit directed in this manner.
The search unit shall then be turned 180'nd the scan repeated.
Calibration for this examination shall be in accordance with Paragraphs 6-4 and 6.5.
7.6 Postexamination Cleanin Arrangements shall be made with the customer
=or postezamiaation removal of couplant materials.
8 ~
RECORDING CRITERIA Indications shall be recorded in accordance with the techniques outlined in the applicable revision of SwRI Nuclear Pro]ects Operating Procedure XX-FE-117, except for the recording levels which shall conform to the following paragraph of this section Xndications producing a x'esponse 20K or greater of the reference level shall be recorded and investigated by a Level XX or a Level XXI exami.aer to the extent necessary to determine the shape, identity, arid 1ocation of the reflector.
All ultrasonic xeflectors (regardless of signal amplitude) not attribut-able to geometry shall be recorded and investigated by a Level II or a Level III examiner to determine the shape,* identity, and location of the reflector.
Examples of nongeometric reflectors (which may occur at any amplitude) are those that are slightly removed from the weld root and/or chamfer, mask the root iadicatioas, are transverse to the weld, or have linear dimensions with side braaches-Indications 20X or gx'eater of the refexence level attributable to geometry shall be recorded only once, even if the amplitude of the indication fluctuates above,and below the required recording amplitude along the weld.
These indi-cations shall be investigated by a Level XI or a Level IXI examiner to deter-mine the shape, identity, and location of the reflector.
If indications that have been recorded as geometry have been investigated and found to be aongeo-metric reflectors, the entire weld shall be reexamined aad all noageometric reflectors and other reflectors not previously recorded shall be recorded.
SwRI Farm QA3-2
TP-ISI-309, Revision 0, Pa e 19 of 19 "4
SOUTHWEST RESEARCH INSTITUTE NUCLEAR PROJECTS OPERATING PROCEDURE SwRI-NDT-800-36 Revision 30 June 1984 Page 16 of 16 Indications investigated and found to be other than geometrical in nature, regardless of the ampli,tude, shall be reported'to the customer for evaluation.
The end points of the indication as determined by 100X DAC shall be recorded.
Scanning limitations shall be recorded.
9-EVALUATION Evalu t'on of reportable indications shall be the responsibility of the
- customer, or the customer's epresentative, and shall be conducted in accor-Qaflce wltn 0 -" '1 '
afnQ reosuÃe v sue 'oue>>
ceca.ioa iI>> Ar
~A 30 4 ~
The applicable year and Addenda of the Code shall be as specified in Section 3
of this procedure.
10 ~
RECORDS The customer shall receive copies of documents generated in accordance with tnis procedure in the examination report.
Documents generated in accordance with this procedure shall be retained as a portion of the examination report.
The examination report shall be stored by the Manager of the Support and Administration Section, Quality Assurance Sys-tems and Engineering Division, in the Data Storage Facility for the period specified by the contractual agreement with the customer.
SwRl Fotm QA3-2