ML19274E500

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Ultrasonic Examination Procedures for Closure Head & Flange Welds.
ML19274E500
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:
References
80A0467, 80A467, NUDOCS 7903290017
Download: ML19274E500 (26)
v • d • e


Text

'

4 PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS PAGE 1 0F 26 O

ULTRASONIC EXAMINATION PROCEDURES FOR CLOSURE HEAD AND FLANGE WELDS LONG ISLAND LIGHTING COMPANY SHOREHAM NUCLEAR POWER STATION UNIT I Prep'd by

) Data 3 #I-I2-77 Proj ec t)ig r. c. Date HES % ~ ' '

REV. ti0. DATE S

Mgr. ISt Level lII Date 0 8/4/77 NES Y '- *  ? ' 2 'A

'151 Progra it' f- Level 11I Date i

' ' h'!7 ne, j d ei M 4 7-zs-n 2 12/20/77 QA Mgr.

/ Date 3 7/20/78 LiLCO k Y S "' I' l' 7 l'I T bau 4 10/30/73 .

Date 79032900l] M;? ,

NUCLEAR ENEAGY SERVIC25. If 4C.

~

PROCEDURE fl0. 80A0467

SUBJECT:

CLOSURE HEAD WELDS PAGE 2A 0F 26 Rev. Prep'd No. Date Description Reason by' App'd by 1 10-15 11.3.1: Delete reference LILCO comments of 10-14-77 NES LILC0 to"S&W ESDCR HARTFORD comments of 10-10-77 -

A5210.40" Al @6 11.3.2: Change "S&W" to "LILC0" p.22, 23, 24: Add sign.

line for

" reviewer" 2 12-77 Pg. 22: delete"T/8" N fffg 3 7-78 2.1 Clarify Code Useage 8.3 Change to " Full Vee" LILCO and :mC co r.ents y g "X S i;pp8 Figures-Change to " Full Vee"

  • M >

4 10-75 8.3(1) Change to incorporate To meet Full Vee examination re- *0.f. h(E ' N.#

Full Vee Calibration. quirements.

S.3(2) Changed para. to read

".. response from the 3/4T hole."

Revised procedure to reflect use of full Vee examination as well as 1/2 Vee exam-ination. (Sectioa 3.3 and 8.4)

O jhM HUCLEAR ENERGY SER'/ ICES. INC.

Procedure No. 80A0467

Subject:

CLOSURE HEAD WELDS Page 12 of 26 (1) Adjust the sensitivity control settings to those recorded for the calibrated reference sensitivity. See Section S.2(2).

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

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

8.3 Angle Beam Calibration (Second Half of Vee Path)

Angle beam sweep calibration and Distance-Amplitude Correction should be performed as follows and as shown in Figure 4:

(1) Adjust the instrument sweep controls so that the signal response g from the 1/4T and 13/4T holes occur at the first (1st) and seventh (7th) horizontal screen positions as shown in Figure

4. To verify sweep calibration, ensure that response from square notches appear near the fourth (4th) and eighth (8th) d d horizontal positions respectively.

(2) Position search unit to obtain* maximum response from the 3/4T hole. Adjust sensitivity control to provide a signal ampli-tude of 30% of FSH and mark location and amplitude on CRT.

A (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 indicate amplitudes.

(5) If the instrument is equipped with an electronic Distance-Amplitude Corr 2ctiondevice, 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.

.O

_[*$ NUCLEAR ENERGY SErlVICES, INC.

Procedure No.. S E')'67 2

Subject:

CLOSURE HEAD WELDS

. Page 13 of _ 26 (7) This is the primary reference sensitivity. Record all sen-sitivity control settings on the appropriate Calibration Data Sheet.

(8) Report all data and instrument settings on the Calibration Data Sheets.

3.4 Angle Beam Calibration (First Half of Vee Path)

Angle beam sweep calibration and distance-amplitude correction should g be performed as follows and as shown in Figure 4:

(1) Adjust the instrument sweep controls so that the signal re-sponse from the 1/4T and 3/4T holes occur at the first (1st) and third (3rd) horizontal screen positions as shown in Figure

4. To verify sweep calibration, ensure that response from square notch appears near the fourth (4th) horizontal positions.

(2) Position search unit to obtain maximum response from the hole which gives the highest amplitude signal. Adjust sensitivity control to provide a signal amplitude of 80?6 of FSH and mark location and amplitude on CRT.

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

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

(5) If the instrument is equipped with an electronic distance-amplitude correction device, the primary reference response shall be equalized at 30o6 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.

NUCLEAR ENERGY SERVICES. INC.

P vCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS

. PAGE 1 0F 2 c; ULTRASONIC EXAMINATION PROCEDURES FOR CLOSURE HEAD AND FLANGE WELDS . .

LONG ISLAND LIGHTING COMPANY .

SHOREHAM NUCLEAR POWER STATION UNIT I Prep'd by _

J h Date 9 f1ES / ~I2-7[

__ Projectpgr. ^

_.__- Date

/

  • s IlE S ' ~ ' ' ! '

D * '/

f~b' i'l

. NO. DATE Mgr. ISI Level til Date 5

(

0 8/4/77 tlES

^

bN P-2 7- D

,ISI Progrc. Mp. Level 111 Date d HES $ f-23-77 2 12/20/77 QA Mgr. ,[ ,

Date 3 7'/20/78 LILCO M.X.I d ~ w 6 /n / 7 7 Date 4 10/30/78 -

Date O

,  ; 'PJCLEAR E;1EAGy SEnvic25, it;C.

'0URE NO. 80A0467

(

PR{dCT:

SUba CLOSURE HEAD WELDS PAGE 2A 0F 25 Rev. Prep'd .

No. Date Description Reason by' App'd by 1 10-15 11.3.1: Delete reference LILCO co ments of 10-14-77 NES LILCO to"SSW E6DCR HARTFORD comments of. 10-10-77 .

A5210.4D" Al ,

11.3.2: Change "SSV" to "LILC0" ,

p.22, 23, 24: Add sign.

line for

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

N_ tistu 3 7-78 2.1 Clarify Code Useage 8.3 Change to " Full Vee" LILCO cnd NRC cc=ents g g m gj.33 Figures-Chan;;c to " Full Vee" 4 10-75 8.3(1) Change to incorporate To meet Full Vee examination re-Full Vee Calibration. quirements.

t.f. k Y *M/40 3.3(2) Changed para. to read

".. response from the 3/4T hole."

Revised p~rocedure to reflect use of full Vee examination as well as 1/2 Vee exam-ination. (Section S.3 and 3.4)

O b;

fi. HUCLC.AR ENERGY SIRVICES, INC.

(

4. ~. ' . -

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Procedure No. 80A0467

Subject:

CLOSURE HEAD WELDS I

. Page 12 of 25 l

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

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

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

~

8.3 Angle Beam Calibration (Second Half of Vee Path) -

! Angle beam sweep calibration and Distance-Amplitude Correction should j be performed as follows and as shown in Figure 4:

l (1) Adjust the instrument sweep controls so that the signal response from the 1/4T and 13/4T holes occur at the first (1st) and g

seventh (7th) horizontal screen positions as shown in Figure

4. To verify sweep calibration, ensure that response from i square notches appear near the fourth (4th) and eighth (8th) d, d j horizontal positions respectively.

j (2) Position search unit to obtain maximum response from the i 3/4T hole. Adjust sensitivity control to provide a signal ampli-tude of 80% of FSH and mark location and amplitude on CRT.

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

! (4) Position search unit for maximum response from the far surf ace notch and "X" mark the screen and data sheet to indicate amplitudes.

I

! (5) If the instnment is equipped with an electronic Distance- ,

? Amplitude Correctiondevice, the primary reference response i shall be equalized at 30% of FSH over the distance range to be employed in the examination.

? (6) Plot a Distance-Amplitude Correction (DAC) curve by connecting l the locations (marked on the CRT) with a continuous line

, extended to cover the full examination range as shown in Figure 4. -

}

1

---[ HUcLEAR ENERGY SERVICES. INC. -

Procedure No. 80A047

Subject:

CLOSURE HEAD WELDS l Page an of x i (7) This is the primary reference sensitivity. Record all sen-  ;

sitivity control settings on the appropriate Calibration Data Sheet.

(8) Report all data and instrument settings on the Calibration Data Sheets.

8.4 Angle Beam Calibration (First Half of Vee Path) .

Angle beam sweep calibration and distance-amplitude correction should be performed as follows and us shown in Figure 4:

g (1) Adjust the instrument sweep controls so that the signal re- i sponse from the 1/4T and 3/4T holes occur at the first (1st) and third (3rd) horizontal screen positions as shown in Figure

4. To verify sweep calibration, ensure that response from square notch appears near the fourth (4th) hMzontal positions.

(2) Position search unit to obtain maximum response from the i hole which gives the highest amplitude signal. Adjust sensitivity I control to provide a signal amplitude of 80% of FSH and mark I location and amplitude on CRT.

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

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

notch and "X" mark the screen and data sheet to indicate f amplitude.

(5) If the instrument is equipped with an electronic distance-amplitude correction device, the primary reference response shall be equalized at 30?5 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. - -

l I ,

O I

HUCLEAR ENERGY SERVICES. INC.

PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD WELDS PAGE 13 0F 25 o

Gy (7) This is the primary reference sensitivity. Record Y y all sensitivity control settings on the appropriate Calibration Data Sheet.

(8) Re t all data and instrument settings on the Celibra-tion a Sheets.

8.4 Angle Beam Calibration eck_ .

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

(1) Adjust the sensitivity control attings to those recorded for the calibrated refere. e sensi tivi ty.

See Section 8.3 (2) .

(2) Reposition search unit at each respective te hole and observe signal response amplitudes and horiz tal screen positions.

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

(.

90 EXAMINATION PROCEDURES 91 Examination of Base tiaterial for Lamination 9.1.1 Straight beam examinations to detect laminar reflectors which might affect the interpretation of angle beam results shall be perforned at a sensitivity level giving an initial back reflection signal amplitude of 80% FSH.

9.1.2 A rectilinear scan pattern shall be used.

9.1.3 For the location and the numbers of the welds refer to the Program Plan. Examination shall not be considered complete until all recordable indications have been evaluated.

9.2 Straight and Angle Beam Examination of URY 9.2.1 Straight and angle beam examination of weld and required volume shall be performed at a scanning sensitivity level at least 2X (6dB) greater than the calibrated

- reference sensitivity level.

O j'_ MJCLEA:3 ENIMV SE*v.CES : .C.

PROCEDURE NO. 80A0467

SUBJECT:

CLOSURE HEAD VELDS PAGE 17 0F 25

_ _ go

=

13" ,

E

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// ID

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.L45 0 uRV ) .L45 J, 4-1/16" 0* 45 = // 0 WRV

  • nominal LEGEtlD

.}-. Perpendicular to Veld

== Parallel to Veld

  • O Base Material WRV Weld E. Required Volume

. FIGURE 1 - ULTRASONIC EXAM 1NAT10tl 0F CLOSURE HEAD C!RCUMFERENTI AL AND MERIDIONAL DOME WELDS.

O NUCLE /4.3 ENERGY SERVICES, INC.

  • PROCEDURE NO: 80A0467

SUBJECT:

CLOSURE HEAD VELDS PAGE 18 0F 25 gal S '

V .

LEGEND 0

0* _}_ Perpendicular Scan,

= Parallei Scan 45 .L {3 g

  • O Base Material WRV We1d r, Required Volume

<4 5 =

0 WRV 2i ,

N g gii N

s -

is B

'N N~ ~452. X \ y Examine as far as 45 = scometry permits

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O VRV I l  : I t

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'U FIGURE 2 - ULTRA 50:11C EXAMINATION OF CLOSURE HEAD FLANGE WELD.

O PIUCLEAR ENEROY SERVICES, IHC.

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

- - - - - ~ ~

PROCEDURE fl0. _80A0467

SUBJECT:

CLOSURE HEAD UELOS PAGE 3n 0F '_ x

~

Examination Surface -

t "

O O tT T O O - 1T O O - 3/4T e-.

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' q G ::  ::

lN  !! ll !! -

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Calibration Holes (6)

Standard Block Hole Hole I;otch t;o. Thick. hT iT 3/4T Dia. Depth Depth StPS-4 4-3/32" l.02" 2.04" 3.06" 0.25" 3.00" 0.082" (2%T)

J FIGURE 3 - ULTP.ASONIC CALIBRATION STANDARD StiPS-4 FOR CLOSURE HEAD WELDS..

O

Procedure No. 80A0067

Subject:

Closure Head Welds

. Page 20 of 25 I

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x x,x 'v y v' m <<?'X eo 'O vt v-Straight Beam Angle Beam ~

Search Unit Positions Search Unit Positions Initial DAC Curve DAC Equaliz

[ Full Ve --

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s-- ---- -

1/2 Vee -.!

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(b h! k 6 8 l'0 j (l 2 4 6 7 h 10 Step 1 - Adjust sweep controls so that indications from holes are located at the appropriate horizontal screen divisions.

Step 2 - Adjus,t sensitivity to provide 80% FSH indications using 1/4T or 3/4T hole,*

  • mark position on screen.

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

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

Step 5 - Use Distance-Amplitude Correction to electronically equalize amplitude respone at the specified reference level.

Step 6 '- Record all sweep and sensitivity control settings on respective data sheets.

FIGURE 4. - REFERENCE SENSITIVITY -AND DAC CALIBRATION PROCEDURES FOR ULTRASON!C EXA.\11 NATION OF WELDS.

"dep:nding on transducer near field, either DAC shape can be expected

" use the 3/4T bote for full vee exam (see Sectio 7 3.3)use the 1/4T hole for 1/2 vec exam (see 5:ction 8.4) o}

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