ML20062H027

Ultrasonic Examination Procedures for Closure Head & Flange Welds.

ML20062H027
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	10/30/1978
From:	LONG ISLAND LIGHTING CO.
To:
Shared Package
ML19274E499	List: ML19274E498 ML19274E500 ML19274E501 ML19274E502 ML20062H027
References
80A0467, 80A467, NUDOCS 7903290021
Download: ML20062H027 (26)

Text

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PROCEDURE NO. 80A0467 i

SUBJECT:

CLOSURE HEAD WELDS I PAGE 1 0F 26 ULTRASONIC EXAMINATION PROCEDURES ,

FOR CLOSURE HEAD AND FLANGE WELDS

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i LONG ISLAND LIGHTING COMPANY 1

, SHOREHAM NUCLEAR POWER STATION

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UNIT I b __

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P0QV Pt ep'd by M

\) Date NES -I2~77 Proj ect gr. o- Date y

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.N. DATE Mgd ISI Level lil S Date o 8/4/77 NES

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-7.b IM P 7 2 1 ISI Pro M . Level ill Date .S 1 10/14/77

'NES g g graY /

f-23-77 2 12/20/77 QA Mgr. Date

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3 7/20/78 LILCO -7. X. 6 to/nh r Date 4 10/30/73 l ,

, g Date 790329002l Cony No. ,, Assigned toh W M.J. Mulla rkev l -

. NUC1. EAR ENERGY SERVICES. IllC.

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3 PROCEDURE NO. 80A0467

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SUBJECT:

CLOSURE HEAD WELDS PAGE 2 0F 26

.1r (continued on 2A)

I RECORD OF REVISIONS J

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s Prep'd

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.j' Rev. -

No. Date Description Reason by . App'd by I 10-15 p.1  : Add "l'evel lil" LILCO comments of~ 10-14-77 NES LILCO Delete "S&W" HARTFORD comments of 10-10-77 Ii i

1.2.2: Delete "and/or Au f

v&(/ scln/"

W j scan fixtures"

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2.1 (6) : Delete entirely.

. 5.2.8: Re-number as 5.2.5 5.2.8: "All examination weld / areas ... so recorded" . ,

. 5.4.2: Delete entirely.

5.4.1: Delete "5.4.1" '

5.6.2: Change 1/64" to 3

1/32".

5.6.3:

{

(,) Delete entirely.

Re-number 5.6.4, -

! 5 and 6. .

6.1(1); Add "in compliance

• with Ref. 2.1(1\"

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6.1 (7) : Add " Thermometer" 4

6.2: Delete (6),(7), -

.I Re-number (8) (9) i' (10) i 1j 8. l (1) : Change " divisions'  !

to " positions"

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,, 8.l(2): Spell out "FSH"

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8.3 (1) : Change " divisions"

'1 to " positions" ,

11.1: Add "The data sheets..... Code o inspector."

/k NUCLEAR ENERGY SERVICES. IN r -- _ws -

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l PROCEDURE NO. 80A0467 j

SUBJECT:

CLOSURE HEAD VELDS

.i PAGE 2A 0F 26 i

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Prep'd -

l Rev.

Description Reason by' App'd by No. Date

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-i LILCO comments of 10-14-77 NES LILCO i 1 10-15 11.3.1: Delete reference

} to"S&tt E&DCR HARTFORD comments of. 10-10-77

! A5210.4D" MN t

' I 3 11.3.2: Change "S&W" to 8 . ) "LILC0" 1, x .'

p.22, 23, 24: Add sign.

line for  ;

" reviewer" i 2 12-77 Pg. 22: delete"T/8"

,fff; ,

3 7-78 2.1 Clarify Code Useage 8.3 Change to " Full Vee" LILCO and NRC cc:= ents g g, 7X$

sij;ps l Figures-Change to " Full Vee" i

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. Z/ M* 5 l r- 10-78 8.3(1) Change to incorporate To meet Full Vee examination re- V.f. P

1. g#7.

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()4 Full Vee Calibration. quirements. ,

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8.3(2) Changed' para. to read .

".. response fr.om the .

3/4T hole."

'l Revised procedure to reflect use of full Vee examination i as well as 1/2 Vee exam-1 ination. (Section 8.3 and 8.4) l l

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-_ HUCLEAR ENERGY SER'/ ICES. INC.

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PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS PAGE 3 0F 76

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ULTRASONIC EXAMINATION' PROCEDURES FOR CLOSURE HEAD q

fg HERIDIONAL, CIRCUMFERENTI AL DOME AND FLANGE WELDS Si

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1.0 SCOPE ,

-1 1.1 Area of Examination ,

1

This document covers the ultrasonic examination procedures 's i ".i -

for the Closure Head: i i,

' m-(1) Herldional welds. ~l

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(2) Ci rcumferential dome weld.

(3) Flange weld. l 1.2 Type of Examination 4 1.2.1 Volumetric examination shall be performed using ultrasonic j pulse echo nominal 45 angle beam shear wave and#0 straight i beam techniques applied to the outside surfaces of the Closure Head. l 1.2.2 The examination shall be performed manually using contact

, ') search units (transducers). _ , , , _ ,1, _ _ _l A l ( /

j 1.3 Time of Examination j These procedures shall govern the preservice examination and i c) re-examination, of, repaired areas of the Closure Head as required  ;

by the ASME Boiler and Pressure Vessel Code,Section XI. J 4

1.4 Weld Configuration I

1.4.1 The Closure Head meridional, circumferential dome,and flange welds have a nominal thickness of 4-1/16". (Minimum thick-ness of 3-3/16").

I1 1.4.2 Typical Closure Head weld configurations and nominal weld i

i thicknesses are shown in Figures 1 and 2.

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NUCLEAR ENERGY SERVICES. INC.

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I j PROCEDURE NO. 80A0!67

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SUBJECT:

CLOSURE HEAD WELDS PAGE 4 0F 2A 2 .

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{ 1.5 Materials 1

f; j The Closure Head is constructed of low carbon steel. -

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2.0 REFERENCES

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

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(1) ASME Boiler and Pressure Vessel Code,Section XI, b 1971 Edition and the Summer of 1972 Addenda for examination coverage.

(2) ASME Boiler and Pressure Vessel Code, Section 11I, 1971 Edition and the Summer of 1972 Addenda.

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

(4) ConAm Procedure for Certifying Inspection Personnel, CUTP-1, Rev. 4, September, 1975.

i (5) ConAm Procedure for Ultrasonic Instrument Linearity Verification, 25-PS-002, Rev. 2, November 1975.

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I i ) (6) ASME Boiler and Pressure Vessel Code,Section XI, A

- k l 1974 Edition for technique. I g

2.2 Applicable Drawings o

The following drawings are part of this procedure:

, '(1) CE Assembly Dwg. E-234'-485

'} .. .. I l 23 Operational Manuals The equipment operational manuals for the particular ultrasonic

} instruments used form a part of this procedure.

l NUCLEAR ENERGY SERVICES, INC.

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PROCEDURE NO. 80A0%7

SUBJECT:

CLOSURE HEAD WELDS

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.; 30 PROCEDURE CERTIFICATION i

j The examination procedures described in this document comply with i Section XI of the ASME Boiler and Pressure Vessel Code, 1971 Edition

! including Summer 1972 Addenda, except where examination coverage is -

3 limited by part geometry or access. .

t l 4.0 PERSONNEL CERTIFICATION

q'l 4.1 Personnel Certification Requirements m

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4.1.1 Each person performing ultrasonic examination governed by-j -

this procedure shall be certified in accordance with the References 2.1 (1), 2.1 (3), and 2.1 (4).

4.1.2 An examination crew shall consist of one or two members as needed. At least one member of each crew shall have a minimum qualification of Level 11 in accordance with the above referenced documents. The remaining member shall have a minimum qualification of Level I.

4.2 Personnel Records 4 4.2.1 Records of personnel qualification shall be maintained by l Examination Contractor.

4.2.2 A c;.,py of the examiner's certification summary and a current

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eye test as required by SNT-TC-1A shall be filed with each permanent examination record, with a copy submitted to the 4

plant owner or his agent, prior to performing' examination

' per this procedure. .

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ll 5.0 EXAMINATION REQUIREMENTS

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,! 51 Examination Frequency Ii 5.1.1 The nominal examination frequency shall be 2.25 MHz for ll

jl> all straight beam and angle beam examinations.

i 5 1.2 During preservice examination, other pulse frequencies

'! shall be used only if such variables as material attenu-

} ation, grain structure, etc., necessitate their use to

- achieve penetration or resolution. This information shall be recorded on the data sheets.

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PROCEDURE NO. 80A0467  ;

SUBJECT:

CLOSURE HEAD WELOS

,' PAGE 8 0F 2f, t j

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5. 6. 3 Circumferential dome head welds and closure head to flange weld datum points shall be located on the weld centerline f 3,

'i at vessel 0 .

5.6. 4 Meridional weld datum points shall be located on the weld i

' centerline at the bottom end of each weld.

' 1, 5.6. 5 Each weld datam point along with respective weld reference

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points and divisions shall be shown on each examination report. ,

6.0 EQUIPMENT REQUIREMEllTS

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6.1 Examination Contractor's Equipment f

The following test equipment or its equivalent shall be provided '

by the Examination Contractor (as a minimum) for examination of the Closure Head welds:

(1) Pulse Echo Ultrasonic Instrument. (in compliance with Ref. 2.1(1)) 8 (2) lledge, 45 , Refracted Shear \ lave.

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

(4) Search Units, 1/2" x 1", 2.25 MHz.

- (5) Couplant.

Camera, (7) Thermometer. 4 (6) j J

6.2 Plant Owner's Equipment _ ,

The, Plant Owner or his Agent shall provide the following service facilities and equipment as required:

(1) Scaffolding.

(2) Water, Air, and Electrici ty.

t (3) Temporary Lighting.

(4) Crane or Lifting Devices.

(5) Calibration Standard No. SNPS-4.

i ME AR E96EMY ME WGC, 1

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PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD UELOS 3 PAGE 6 0F 26 I

t 5.2 Examination Angles and Coverage 1

5 2.1 The Intent of this procedure is to previde maximum examina-j] tion coverage to ensure weld Integrity. Each weld shall be scanned with minimum 25% overlap of the transducer width -

(diameter) for each scan pass.

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5 2.2 The rate of search unit movement shall not exceed six (6)

Inches per second.

' 5.2 3 Each weld and the required volume (WRV) of metal for one-I half (i) wall thickness (T) on each side of the weld shall

'~' be ultrasonically examined using 45 shear wave angle beam

) techniques applied in two directions perpendicular to the i weld axis and in two directions parallel with the weld axis, on both sides of the weld, except where restricted by part geometry or access.

5 2.4 Straight beam techniques shall be applied, where part geometry permits, to all parent material through which the .

angle beams will pass during angle beam examinations. In-dications detected are to be recorded in accordance with Section 10.1.1 of this procedure.

525 in addition, straight beam techniques shall be applied to the weld and required volume where part geometry permits.

Indications shall be recorded in ac'cordance with Section

' 10.1.2 of this procedure.

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il 5.2.6 other angles may be used if required for aid in evaluation of reflectors or to accommodate geometric restrictions and j limite.d access. All information shall be recorded on,the data ,j sheets.

5.2.7 Uhere examination surface, geometry,or other conditions +

l (weld, contour, access, etc.) do not permit a meaningfu1~

l ultrasonic examination to be performed, the examiner shall-record the area of non-examination and the particular in-terfering condition in the space provided on the Calibration

'! Data Sheet. in addition, he shall make a sketch of the weld

' and adjacent conditions on the reverse side of the calibration ,

data sheet (Figure 5).

l 5 2.8 All examination weld / areas shall be entered in the space provided on the Calibra, tion Data Sheet. If there are no recordable indica- S

, tions, it shall be so recorded.

! 5.2.9 Coverage for the welds specified in Table 1 is shown in i Figures I and 2.

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PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS j

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j 5.3 Liquid couplant 5 3.1 The ultrasonic couplant shall be suitable for use on nuclear

! plant material and be certified to have less than 1% sulfur i and halogens by weight.

5.3 2 The couplant shall be supplied in clean containers of suf-I ficient quantity to perform the examination.

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

1 I 5.3.4 Where required, the examiner shall be responsible for removing

- -~3 j  ; couplant from the. examination surface at the conclusion of l

the examination.

5.4 Surface Preparation

$Allexaminationsurfacesshouldbecleanandfreeofdirt, Idi

' weld spatter, etc. , or any other condition which would

• interfere with the examination by impairing proper trans-mission of the sound beam, or by preventing free movement of the search unit along the examination surface.

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5.5 Weld Identification

/T Each weld shall be located and identified per the appropriate weld

) map located in the Program Plan Book.

5.6 Datum Point i 5.6.1 The examiner shall verify that there has been marked, a.

reference datum point on each weld from which all examina-tion data and reported indications shall be referenced.

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5.6.2 Datum points shall be marked by the use of low stress stamps or vibratooling and shall not be deeper than 1/32". ._ _ ,

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NUC(EAR ENERGY $ERVICES K

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SUBJECT:

CLOSURE HEAD WELDS e PAGE 9 0F 7g 1

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j (6) Test Surface Preparation.(cleaning and finishing)

.' (7) Drawings of Each Examination Area.

i- (8) Post-Examination Cleanup of Test Area.

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• 7.0 CAllBRATION REQUIREMENTS

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i j 71 Ca11bration Data Sheets 1

Calibration Data Sheets shall be numbered 467-1, 467-2, 467-3, etc., at the time of calibration and shall be signed by the examiner (s) upon completion. Figure 5 is an example of the Calibration Data Sheet to be used with this procedure.

7.2 Calibration Standards 7 2.1 The calibration standard designated in Section 6.2 (5) shall be used for basic instrument calibration and for establishing reference sensitivity levels for examination of the specified welds. (See Figure 3).

t l* 7.2.2 The Identity of the calibration standard used for performing calibration shall be recorded on each Calibration Data Sheet.

f ) 7.2.3 Calibration procedures for the examination shall be performed 4

using the O D surface of the referenced standard. .

7.2.4 The temperature of the calibration standard shall be within i 25 F of the component temperature. Calibration standard and component temperatures shall be recorded on the Calibra-l tion Data Sheet.

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7.3 Reference Sensitivity level i

l 7.3 1 The reference sensitivity level shall be the distance-

<; amplitude curve initially obtained directly from the cali-l bration standard and shall be the sensitivity level used for evaluating and recording all indications.

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

i NUCLE LR ENERGY SERvlCEilNC s + n v-n m

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• O PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELOS PAGE 10

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-4 7.4 Times of Calibration

'l 7.4.1 Basic instrument calibration shall be performed using the i

) appropriate calibration standard, search units,and instrument-I ation immediately prior to the examination of the Closure Head.

-l 1 Instrument vertical linearity checks shall be performed .

'i 7.4.2 1 at the beginning of each day of examination in accordance i

wi th the procedure referenced in Section 2.1 (5), using an

! angle beam search unit applied to the code of calibration s'tanda rd.

7.4.3 Examination system calibration' checks shall .be performed i

at least at the beginning and at the completion of each

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four (4) hour period of examination and/or at the change of examination personnel, equipment, search units, coupler j

shoes, etc., and at the completion of the examination of each similar series of welds in accordance with Sections 8.2 and 8.5 of this procedure.

75 Calibration Response 7 5.1 Calibration response shall be checked at the primary J reference sensitivity level.

752 signal response obtained during calibration check shall t

' be within plus or minus 20% of that established during basic system calibration.

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7.5.3 If any point on the DAC curve has decreased by more than (s ) 20% of its amplitude, the examiner shall:

! (1) Mark all weld data sheets void since previous calibration.

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! (2) Recalibrate examination system.

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. (3) Re-examine volded areas.

j 7.5.4 If any point on the DAC curve has increased by more than 20% of Its amplitude, the examiner shalI:  ;

l (1) Recalibrate examination system.

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! (2) Re-evaluate all indications recorded since the previous calibration at the corrected sensitivi ty level.

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, PROCEDURE NO._ 80A0467 i-

SUBJECT:

CLOSURE HEAD WELDS j PAGE 11 0F 26  ;

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,I l 755 if any point on the DAC curve has moved horizontally more

.; than 5% of the sweep line from its original settings, the examiner shall:

i (1) Correct the sweep calibration and note it on the -

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Calibration Data Sheet.

)' (2) Void any data sheets made since the previous cali-bration which have recorded indications and re-examine those areas.

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8.0 EXAMINATION SYSTEM CAllBRATION

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! 8.1 Straight Beam Calibration i

Straight beam sweep calibration and distance-amplitude correction shall be performed as follows and as shown in Figure 4:

(1) Adjust the instrument sweep controls so that the signal responses frcm the 1/4T and 3/4T holes occur at the second (2nd) and sixth (6th) horizontal screen positions.  !

A 4

Position search unit to obtain maximum response from

l (2) the hole which gives the highest amplitude signal.

Adjust sensitivity' control to provide a signal amplitude of 80% cf -Full Screen Height (FSH) and mar.k location 4 and amplitude on the CRT.

(3) Without changing sensitivity, position the search l unit respectively on the remaining holes and mark .

i signal amplitudes and locations on the CRT.

t (4) Plot a DAC curve by connecting the locations (marked on the CRT) with a continuous line extended to cover

! the full examination range as shown in Figure 4.

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

! Calibration Data Sheet.

8.2 Straight Beam Calibration Check 4

- Straight beam calibration check as required by Section 7.4.3

[

shall be performed as follows:

l PauCLE Aft ENERGV SEfMCEilNC

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l j Procedure No. 80A0467

Subject:

CLOSURE HEAD WELDS i Page 12 of 26

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(1) Adjust the sensitivity control settings to those recorded for 1 the calibrated reference sensitivity. See Section 8.2(2).

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! (2) Resposition search unit at each respective test Hole and observe maximum signal response amplitudes, and horizontal screen positions.

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

4 check. -

,q 8.3 Angle Beam Calibration (Second Half of Vee Path) i j Angle beam sweep calibration and Distance-Amplitude Correction should i be performed as follows and as shown in Figure 4:

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(1) Adjust the instrument sweep controls so that the sigr t response from the 1/4T and 13/4T holes occur at the first (ist, 7d g

l seventh (7th) horizontal screen positions as shown in Figure l 4. To verify sweep calibration, ensure that response from square notches appear near the fourth (4th) and eighth (8th) horizontal positions respectively.

d d (2) Position search unit to obtain maximum response from the '

3/4T hole. Adjust sensitivity control to provide a signal ampli-tude of 80% of FSH and mark location and amplitude on CRT.

d (3) Without changing sensitivity, position search unit respectively on the remaining angle beam calibration holes and mark signal amplitudes and locations on CRT.

(4) Position search unit for maximum response from the far surface notch and "X" mark the screen and data sheet to

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indicate amplitudes.

l (5) If the instrument is equipped with an electronic Distance- -

Amplitude Correctiondevice, the primary reference response shall be equalized at 80% of FSH over the distance range to be employed in the examination.

(6) Plot a Distance-Amplitude Correction (DAC) curve by connecting

! the locations (marked on the CRT) with a continuous line extended to cover the full examination range as shown in Figure 4.

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- $A e NUCLEAR ENERGY SERVICES. INC.

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Procedure No. 80A0067

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Subject:

CLOStJRE HEAD WELDS Page 13 of 26 1

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(7) This is the primary reference sensitivity. Record all sen-l- sitivity control settings en the appropriate Calibration '

Data Sheet. s c

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(8) Report all data and instrument settings on the Calibradon ,

j Data Sheets.

8.4 - Angle Beam Calibration (First Half of Vee Path) l Angle beam sweep calibration and distance-amplitude correction should g;

l I be performed as follows and as shown in Figure 4:

(1) Adjust the instrument sweep controls so that the signal re-

^l sponse from the 1/4T and 3/4T holes occur at the first (1st) l d and third (3rd) horizontal screen positions as shown in Figure l 4. To verify sweep calibration, ensure that response from square notch appears near the fourth (4th) horizontal positioas. ,

s s (2) Position search unit to obtain maximum response from the ,

hole which gives the highest amplitude signal. Adjust sensitivity control to provide a signal amplitude of 8096 of FSH and mark 3

location and amplitude on CRT.

(3) Without changing sensitivity, position search unit respe-tively g' on the remaining angle beam calibration holes and mark signal j amplitudes and locations on CRT.

(4) Position search unit for maximum response from the far surface

! notch and "X" mark the screen and data sheet to, indicate O -

/ amplitude. ,

(5) If the instrument is equipped with an electronic distance- -

amplitude correction device, the primary reference response i

shall be equalized at 80% of FSH over the distance range to be employed in the examination.

l-(6) Plot a Distance-Amplitude Correction (D AC) curve by connecting ll the locations (marked on the CRT) with a continuous line extended to cover the full examination range as shown in .

Figure 4. ,

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I t NUCLEAR ENERGY SER'VICES, INC.

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• Procedure No. 80A0467

Subject:

r*1 OSilR E HEAD WFf M Page in of 26 (7) This is the primary reference sensitivity. Record all sen-sitivity' control settings on the appropriate Calibration g Data Sheet.

~j Report a!! data and instrument settings on the Calibration (8) 4 j Data Sheets.

r, N 8.5 Angle Beam Calibrar;on Check

. Angle beam ch r'ation check as required by Section 7.4.3 shall be per-formed ces' fol;ows:

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'I; (1) Adjust the sensitivity control settings to those recorded for th3 cdibrated reference sensitivity. See Section 8.3 (2).

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(2) Reposition search unit at each respective test hole and observe

" signal response amplitudes and horizontal screen positions. -

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i (3) See Section 7.5 dor signal response requirements during cal-

, s-s iu- - ib, ration checkl, .

9.0 ' EXAMINATION PROCEDURES .

7,4 i 9.1 ' Examination of Base Material fo'r Lamination 9.1.1 Straight beam examinations to detect laminar reflectors which might

.v affect the interpremion of angle beam results shall be performed l N at aiensitivity level giving an initial back reflection signal amplitude of 8096 FSH.

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k 9.1.2 A rectilinear scan pattern shall be used.

9.1.3 For the location and the numb @ r: of the welds refer to the Program s

- Plan. Examination shall not be considered complete until all records;e ~

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indications have been evaluated.

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~2.2 Straight and Angle Beam Examination of WRV j

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,'9.2.l!' Straight and angle beam examination of weld and required volume j

- " thall be performed at a scanning sensitivity level at least 2X (6dB)

- areater than the calibrated reference sensitivity level.

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PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELOS PAGE 15 0F 26

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.] 9.2.2 For all examinations,a rectilinear scan pattern shall be i used.

v I 923 For angle beam examinations,the search unit shall be ,

c; swivelled to ensure maximum coverage as it is moved

!! along a rectilinear scan pattern.

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9.2.4 For the location and the numbers of the welds, refer to the Program Plan. Examination shall not be considered 4

complete until all recordable indications have been k

evaluated.

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f 10.0 EVALUATION CRITERI A 10.1 Recording of Indications 10.1.1 .For straight beam examinations of base metal for lamin-ations, all areas giving indications equal to or greater than the remaining;back reflection shall be recorded on .

the appropriate data sheet prior to angle beam examination of the weld and the requi red volume.

1 (1) Each recorded area shall be identified as to distance from surface, length and position i

relative to the weld datum point.

(2) Recorded data shall be taken on each parallel '

scan pass at increments not to exceed that f

l

( permitted by the 25% overlap of transducer element diameter (width).

10.1.2 For examinations of the VRV, all indications showing a

'! signal amplitude response equal to or greater than 50%

j of the reference response shall be recorded on the appropriate data sheet at the time of weld examination.

Planar indications at or near the far surface shall be I compared directly with the amplitude obtained from the "I notch.

I (1) Eachrecor)edindicationshallbeidentifiedas to depth ( as a percent of thickness), distance from surface, length, signal amplitude,and location lJ relative to the weld datum point.  ;

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NUCLEAR ENERCV SERVCEueC.

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PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS

! PAGE 16 0F 26 i

l 1 (2) Recorded data shall be taken on each parallel i scan pass at increments not to exceed that per-

-l mitted by the 25% overlap of transducer element

]  !

diameter (width).

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

10.1.3 Indications from all meridional welds shall be recorded in inches above the weld datum point and in inches clockwise (CW) or counter-clockwise (CCW) from the

/~~' t weld centerline when looking down upon the top of the

'... closure head.

10.1.4 Indications from all circumferential dome and flange welds shall be recorded in inches above 6r below the weld centerline and in inches CW or CCW from the weld datum point when looking down upon the top of the closure head.

10.2 Evaluation of Indications 10.2.1 Evaluation of all indications shall be made at the

, refgrence sensitivity and in accordance with the require-ments of the ASME Boiler and Pressure Vessel Code,Section XI,15-300. All evaluations shall be performed by a Level II or Level III.

3 li k _

,I 10.2.2 Results of this evaluation shall be reported to the Plant Owner or his Agent in accordance with the requirements of the ASME Boller and Pressure Vessel Code,Section XI, ,

!15-600. Disposition of evaluation results shall be made

in accordance with the Owner's Plant Procedures.

11.0 EXAMINATION RECORDS 11.1 Certifi ation of Records

,l The examiner shall complete and sign all data sheets immediately upon the completion of each weld examination. The data shests may' l th be reviewed by the authorized Code Inspector.

I  ;

,t ll I

e

sd NUCLEAR ENERGY SERVICES, lNC.

PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS l 1

PAGE 17 0F 26 l 1

I ,

f

',4

' 11.2 Filing of liecords The examiner shall be responsible for submitting to the

.] Plant Osner or his Agent a completely documented set of

j examination records including certification of personnel

,j j

qualifications with a current eye test report in accordance -

' with SNT-TC-1A.

~,

4 11.3 Procedure Corrections and Additions f

I

~

11.3 1 All procedure corrections and/or additions required during the preservice examinations shall be made in 6 accordance with requirements of NES QA Program Plan # HES~ '-

/~T '

80A0448.

. A 11.3 2 The examiner will contact the LILCO represent-ative on site to initiate all such changes. All changes shall be documented in the record of revisions section of this procedure.

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~ - - - - . - . . . _ _

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PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS

j. PAGE ag 0F  ? g, j

.1 4

l i "

- ;; ._; - 13" _

~

=

13" -- g g i _ 2i" _1" , 2t" l e l

((} , ]

[ .L 45

.L45 0 wRV ),* 4-1/16" 00* 45 = '

!/ '

0 WRV o nominal i I

- ~ J LEGEND

.1- Perpendicular to Weld

) ( == Parallel to Veld

• O Base Material I

[ WRV Veld & Required Volume -

1 j

1 FIGURE 1 - ULTRASONIC EXAMINATION OF CLOSURE HEAD CIRCUMFERENTIAL AND MERIDIONAL DOME WELDS.

1 4 '

O 71UCLEAR EtlERGY SERVICES, INC.

l .

f , PROCEDURE MO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS i PAGE 7t) 0F' ?(,

i e

Examination Surface _ _

1 ~

s, O O 4T f

T O O _ iT l

O O - 3/4T

( ,:

1 ....

2 t

bd ik  !! ll  !!

N Calibration Holes

/

(6)

( .,.) Standard Block Hole Hole Notch No. Thick. 4T iT 3/4T Dia. Depth Depth

! SNPS-4 4-3/32" 1.02" 2.04" 3 06" 0.25" 3.co" 0.082"

.1 (2%T) 4 1

l i l j i i

j FIGURE 3 - ULTRASONIC CAllBRATION STANDARD SNPS-4 FOR CLOSURE HEAD WELOS I

. NUCLEAR ENERGY SERVICES, INC.

! l' Procedure No. SOA0467 j

Subject:

Closure Head Welds

Page 21 of 26 1

1 i

k$i a 's 's h 's N N N 's bb 's u i 6 l

' Ns N sN sN N N sN4,',,b i I s s ss v ^

1 s s s.

NN \ N's/g,,,s33

\s \ << X t

U 1

6 s ' o ,

l 1

N \,y s's'N.yv X,c l I

Straight Beam Angle Beam ,

i Search Unit Positions Search Unit Positions Initial DAC Curve DAC Equalized

, [ s,_ initial DAC Curve DAC Equalized

.- / /

[ 's ---- -

) Full V - -

1/2 Ve -- - I

,q, ? : y - _ _ - - - - - - _ _ _ _ _ _ - - - - '

)

. _y r,, - s s  ; ,

!N 's sp ',,s

- 7

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's ss \ .

N -

s

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\ -

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f.  :! X

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f:;!:,1 ih:'

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(0 2 4 6 8 l'0 j ( 2 3 4 S '5 7 3 S 10 )

j f m t j ( '3tep 1- Adjust sweep controls so that indications from holes are located at the appropriate l! J

• horizontal screen divisions.

l Step 2 - Adjus,t sensitivity to provide 80% FSH indications using 1/4T or 3/4T hole,** mark l, position on screen. .

Step 3 - Position search unit for maximum response from remaining holes mark position on screen.

i Step 4 - Plot DAC by connecting points marked with line extended to cover entire examination range.

3 Step 5- Use Distance-Amplitude Correction to electronically equalize amplitude respone at

the specified reference level.

Ste'p 6 - Record all sweep and sens'itivity control settings on respective data sheets.

i

, FIGURE 4. - REFERENCE SENSITIVITY AND DAC CALIBRATION PROCEDURES FOR ULTRASONIC'

. EXAMINATION OF WELDS.

• depending on transducer near' field, either DAC shape can be expected

• • use the 3/4T hole for full vee exam (see Section 3.3)use the 1/4T hole for 1/2 vee exam (see Section S.4)

-  ; NUCLEAR ENERGY SERVICES, INC.

=.

i 22 of 26

• I f Data Shoct No.

Plant / Unit comp / System CALIBRATION DATA SHEET Procedure !!o.

Sub]cct Rev/ Change !!c.

I!1STRUMSNT SETTINGS SEARCH UNIT Calibration Block No.

1fg/Model No.: Scan Angle: Mode: Surface

^

Fixturing (if any): Block Temp *F serial No.

-j Comp. Temp *F j 3 weep Length : Style or Type No. :

1 DEPTH AMPL. ATTEN.

's sweep Delay  : Size & Shape : Tr)r'tr 'in . s de t

?ulse Length / Damping

Freq2ency  :

i 4

Trcq.: Rep. Rate: Serial No/ Brand:

Filter: ~ Video: Jack: I4easured Angle :

F.EC/ Gats Switch: Range: Cable Type & Length:

Jode Select: Reject: Couplant Brand:

r. J pain (coarse) : (fine): Couplant Batch:

.t I L .

{ wo, DAC PLOT ,

INSTR. LINEARITY CAL. ,

1 2 3 & l 5 Amplitude 8 7

High Low High Low 60 SCAN AREA 5

1 5 O' URV 4 0;-

+ -

6 2 30 I I O' Mat'l 2c 7 l

• 3 to lto Weld liin .in in, een n - an ni n.d.ne nn 4 8 0 1 2 3 4 5 G 7 3 9 10

. = to Uc k1 8

AMPL. CONTROL LINEARITY l

' RECORDABLE

/ ' " ', Initial 6 dB Result EXAMINATIOM COMMENTS / REASON FOR i INDICATION I (d 80 -6 UELD/ AREA Yes No INCOMPLETED SCAN (S)

. 80 -12 .

40 +6 20 +12 CALIBRATIO!' RIME Initial Cal.

,l Intermediate li I

Intermediate

. Intermediate Final Cal.

ADDITIONAL SilEETS? (CI!ECK EOX) EXA!!INERS 1 Date Level

'.ontinuatio Baam Plot 2 Date Level supplements l None O

, REVIEUCR ic.y~~~~ -- -. . - _

I - 23 of 26 e

SUPPLEMENT A f Wold 71 i+

4 INDICATION REPORT SHEET

_l (1) -- STRAIGHT BEAM

_ l

_ . _ ., . . . - - Datum Procedure No.

.]

O Subject

' Ueld No.

A

] A X Page of j

t

._. }.

._ d Attached to Cal.

Data Sheet No.

l e

$ Notes :

f' 4

Y~ (1) X-axis increments not to exceed

. allowable scan increments.

b'? n r? f

.} I f (2) End points shall be :(a) 50% of DAC

! D' *

(6db) for URV Straioht Beam exam,

' {"*')

i I (b) equal to Remaining Back Re-

& 1 flection (RBR) for base r aterial l ,

f. lamination exam.

2 '

A (3) This column for WRV Straight Beam I

exam only.

Section A-A (4) This column for base naterial lam-ination exam only. '

FORWAc.D BACK INDI- g,)

MAX (3) (4)

Y @ 11AX (f) (b)

SIDE OF D x  % DAC RDR  % DAC CNDPOIFTIT7 POINT CATION g-NO. WELD (in T/8s) ( db)  % FSH (a) )

i 4

4, sb f

I l

d

'I i

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}

f COtt4ENTS EXAMINERS l

1. Date Level I

i

2. Date Level l ,

i l REVIEWER DATE

'm L -- . . - - - - .

j ) nucuaat=racvstnrces+c.

4*

24 of 26 SUPPLEMENT B Ueld k INDICATION REPORT SHEET

! J. ANGLE BEAM l ,

N -

gy. Procedure No.

- - .~ - . --Datum 0 Subject Weld No.

' A Page of A. ' '

-, bg._~ _ . .

., Attached to Cal.

I Data Sheet No.

f**- Y -d f -

1.

L -

I Notes:

8 (1) X-axis increments not to exceed f allowable scan increments

hn N N N i

(2) End points shall be 50% of DAC

{

{D T Y b_. (W (3) Data must be recorded from both 92 1_[._ __ ____\ ___[L__ \ ___ .' , e sides. If indication cannot be i l*- Y1 k found from the opposite side, so W Y2 M state.

Section A-A

!%XIMUM INDICATION FORWARD (f) BACK (b) CALC.

ENDPOINT I*I ENDPOII:? III L X MAX D G MAX Y0 tux C N P)3 D1 y1 (in) D2 in. tT NO. WELD (in)  % DAC (T/8s) (in) Y'/ {in) 1 EXAMINERS CO:7.ENTS 1 Date Level 2 Date Level REVIEWER DATE A, .g r --- _ _ ,

jhtanacvsmouuc. _