Text

Reactor Vessel Exam Program
	ML20076H285
Person / Time
Site:	Comanche Peak
Issue date:	05/09/1983
From:	Adamonis D, Efthymiou G, Rachel Johnson; TEXAS UTILITIES SERVICES, INC.
To:	;
Shared Package
ML20076H284	List: ML20076H285; TXX-3686, Forwards Westinghouse Procedure ISI-154, Preservice & Inservice Insp of Reactor Vessels & plant-specific Reactor Vessel Insp Program;
References
	PROC-830509, NUDOCS 8306160506
	Download: ML20076H285 (52)
	v • d • e

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4 ATTACHMENT 1 8306160506 830613 gDRADOCK 05000445 PDR

TEXAS UTILITIES SERVICES INCORPORATED Comanche Peak Unit 1 REACTOR VESSEL EXAMINATION PROGRAM May 9, 1983 clo PREPARED B p_ m -2 D. C. Adamonis Metallurgical & NDE Analysis APPROVED:

}-

'I "1

GE C. Efthymfou, Manager Inspection Service 2

R.M.Jdson, Coordinator Inspection Service FOR:

Texas Utilities Services Incorporated

n TEXAS UTILITIES SERVICES INCGRPORATED Comanche Peak Unit 1 Reactor Vessel Preservice Examination Program This examination program plan and procedures incorporated herein are in accordance with the 1980 Edi. tion of Section XI of the ASME Boiler and Pressu Vessel Code. The areas listed below shall be exam'ined to the maximum extent practical per this program plan utilizing the Westinghouse reactor vessel examination tool.

Vessel / Tool Interface Parameters (1) Tool zero leg to be aligned at vessel O' (keyway #2) for vessel weld examinations.

Tool zero leg to be aligned at vessel O' (keyway #2) and 180' (keyway #4) for examinations of vessel flange ligaments and for examinations of the vessel fl'ange-to-upper shell weld from the flange seal surface.

(2)

ClosureheadguidestudslocatedEtstudholepositions#12,#28,and

44 are not used. Stud holes located on 191.875" bolt circle diameter, numbered clockwise starting at #1 at 270' vessel axis.

(3) All dimensions are referenced from the top 'of the vessel flange and from 0* vessel axis.

Examination Requirements Examine 100% of the following areas of the Comanche Peak Unit'I reactor vessel to the maximum extent practical.

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--w..

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The intermediate-to-lower shell circumferential weld (weld #3) and longitudinal welds in the vessel intermediate shell course (welds #9, #10, and #11) and lower shell course (welds #12, #13, and #14) shall also be examined with the near surface examination fixture.

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EXAMINATIONAREAS-COMdNCHEPEAKUNITNO.1 IWB 2500-1 EXAMINATION ITEM CATEGORY DESCRIPTION W WELD ID

-W SKETCH TBX Bl.10 B-A Reactor Vessel Shell Welds Bl.ll B-A Upper-to-Intermediate Shell Weld 2

1-1100

., Located at 127.2" 0* to 360*

Bl.ll B-A Intermediate-to-Lower Shell Weld 3

1-1100 Located at 235.1" O' to 360' Bl.ll B-A Lower Shell-to-Lower Head Weld 4

1-1100 Located at 342.53" 0* to 360*

Bl.12 B-A Upper Shell Longitudinal Welds Length - 27.87" to 127.2" Located at 42' 6

1-1100 Located at 162*

7 1-1100 Located at 282*

8 1-1100 Bl.12 B-A Intermediate Shell Longitudinal Leng'th - 127.2" to 235.i" Located at O' 9

1-1100 Located at 120*

10 1-1100 Located at 240*

11 1-1100 Bl.12

' B-A Lower Shell Longitudinal Welds Length - 235.1" to 342.53" Located at 90*

12 1-1100 Located at 210' 13 1-1100 Located at 330*

14 1-1100

's 4

EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 1 IWB 2500-1 EXAMINATION W SKETCH ITEM CATEGORY DESCRIPTION W WELD ID TBX B1.20 B-A Bottom Head Welds Bl.21 B-A IMeridionalSection-to-Dollar 5

1-1100 Plate Weld l

(Inaccessible due to instrument nozzles) i Bl.22 B-A Meridional Welds Length - 342.53" to 371.80" (Balange inaccessible due to instrumentnozzles)

Located at O' 15 1-1100 Located at 90*

16 1-1100 located at 180*

17 1-1100 i

Located at 270*

18 1-1100 4

0 I

's EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 1 I

IWB 2500-1 EXAMINATION l

ITEM CATEGORY DESCRIPTION W WELD ID

-W SKETCH TBX Bl.20 B-A Bottom Head Welds I

Bl.21 B-A Meridional Section-to-Dollar 5

1-1100 Plate Weld (Inaccessibleduetoinstrument nozzles)

Bl.22 B-A Meridional Welds Length - 342.53" to 371.80" (Balange inaccessible due to instrumentnozzles)

Located at O' 15 1-1100 Located at 90*

16 1-1100 Located at 180' 17 1-1100 Located at 270*

18 1-1100 i.

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i EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 1 i

1 IWB 2500-1 EXAMINATION ITEM CATEGORY DESCRIPTION W WELD ID T8X W SKETCH Bl.30 B-A Flange-to-Upper Shell Weld 1.

1,1100 Located at 27.87" A.

Examine from vessel ID, reactor vessel shell side. 0* td 360*.

8.

Examine from flange seal surface.

e With tool at O' vessel axis:

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l 43.33' to 76.(i7' 163.33' to 156.67*

283.33' to 316.67*

e With tool at 180* vessel axis:

196.67* to 283.33' 316.67* to 43.33' 76.67* to 163.33*

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_ EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 1 l

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IWB 2500-1 EXAMINATION I

ITEM CATEGORY DESCRIPTION W WELD ID TBX W SKETCH B3.90 B-D

' Outlet Nozzle-to-Upper Sheld Welds Located at 85.5" i

22* nozzle 19 1-1100 158* nozzle 22 1-1100 202* nozzle 23 1-1100 338' nozzle 26 1-1100 4

B3.90 B-D-Inlet Nozzle-to-Upper Shell Welds J

e Located at 85.5" ;!

67* nozzle 20 1-1100-113' nozzle 21 1-1100 247' nozzle 24 1-1100

{

293* nozzle 25 1-1100 l

B3.100 B-D Nozzle Inside Radius Section Examine nozzle protrusion area o

for outlet ' nozzles 19, 22, 23, I

and 26 and inside radius section for inlet nozzles 20, 21, 24, and 25 i

3 EXAMINATION AREAS - COMANCHE FEAK UNIT NO. 1 l

4 IWB 2500-1 EXAMINATION W SKETCH ITEM CATEGORY DESCRIPTION

)l WELD 10 TBX B5.10 B-F Outlet Nozzle-to-Safe End and Safe End-to-Pipe Welds e Located 120.58" and 123.08" from vessel centerline.

rr 22* nozzle 27 l'1100 158* nozzle 30 1-1100 202* nozzle 31 1-1100 i

338' nozzle 34 1-1100 85.10 B-F Inlet Nozzle-to-Sgfh End and Safe End-to-Pipe Welds e Located 127.34" and 131.22" from

. vessel centerline.

4 l

67* nozzle 28 1-1100 1

113' nozzle 29 l-1100 247' nozzle 32 1-1100

{

293* nozzle 33 1-1100 1,

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EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 1.

IWB 2500-1 EXAMINATION ITEM CATEGORY DESCRIPTION W ID

-W' SKETCH TBX 86.40 8-G-1 Vessel Flange Ligaments e With tool at 0* vessel axis:

50' to 70*

40-43 1-1100 170* to 190*

22-25 1-1100 290* to 310*

4-7 1-1100 o With tool at 180* vessel axis:

196.67* to 283 33' 44-3 1-1100 5

316.67* to 43.b3*

8-21 1-1100 76.67 to 163.33*

26-39 l-1100 t

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PROGRAM REQUIREMENTS Procedures (1)

Westinghouse Procedure 15I-154, Revision 1, "Preservice and Inservice Inspection of Reactor Vessels", dated March 16, 1983 shall be used for automated examinations with the Westinghouse reactor vessel

-exam' nation tool.

i

_ Specific Operational Requirements The following criteria shall be input to the Sonic Mark VI Ultrasonic System for calibration and. vessel examination.

i (1) Pulse repetition rate - 250 Hz (minimum).

(2) Pulses / Channel - 3.

(3) Alarm Count - 3 (maximum).

(4)

All vessel weld examinations are performed with 2.25 MHz transducers.

(5)

Vessel flange ligament examinations are performed 'with a 5.0 MHz transduce (6)

Angle beam examinations of n' zzle-for-safe end welds are performed with 1.0 o

MHz transducers.

e Calibrations and examinations shall be performed utilizing search unit sizes refracted angles, and incident angles as defined in the.following tables.

Detailed parameters for the examination of each, individual weld or area, l

incl'uding the location of each scan with reference to the vessel axis and datums, the number of scan increments, and the incremental distances between scans are defined in the inspection program input data prepared in accordance with Westinghouse Procedure, RV-ISI-01, Revision 1.

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COMANCHE PEAK UNIT 1 l

10 YEAR PLATE CALIBRATION REQUIREMENTS 4

8 Transducer Incident Refracted Water Calibration Calibration i

Examination Area I.D.

Size Angle Angle Path Block Reflectors Surface (1) Vessel Flange-to-TR20 11"9 0*

0*L 15" RV-1 A, B, C A

Shell (#1)

TR21 11"9 19' 45*S 16" RV-1 D, E, F A

Shell Side)(From i

TR22 11"9 19' 45'S 16" RV-1 D E.F A

(2) Upper Shell Longi-TR23 li"9 19' 45*S 16" RV-1 D, E, F A

tudinal (#6, 78)

TR24 11"9 19' 45'S 16" RV-1 D. E, F A

TR25 11"9 23.5*

60*S 16.5" RV-1 D E.F A

TR26 11"9 23.5*

60*S 16.5" RV-1 D E,F A

TR27 11"9 23.5*

60*S 16.5" RV-1 D, E, F A

TR28 li"9 23.5*

60*S 16.5" RV-1 D, E, F A

(3) Upper-to-Interme-TR20 11"9 IO*

0*L 15" RV-2 A,8,C A

diate Shell (#2)

TR21 14"9 19' 45'S 16" RV-2 D, E, F A

TR22 li"9 19' 45'S 16" RV-2 D,E,F A

i (4) Lower Shell-to-TR23 11"O 19' 45'S 16" RV-2 D,E,F A

i Head (#4)-(From TR24 11"9 19' 45'S I l 16" RV-2 D, E, F A

i Shell Side)

TR25 11"9 23.5*

60*S 16.5" RV-2 D,E,F A

TR26 11"9 23.5*

60*S 16.5" RV-2 0, E, F A

j TR27 11"O 23.5*

60*S 16.5" RV-2 D,E,F

.A i

TR28 li"9 23.5*

60*S 16.5" RV-2 D, E, F A

(5) Intermediate Shell TR20 li"9 0*

0*L 15" RV-2 A, 8, C A

i Longitudinal (#9, TR21 11"9 19' 45*S 16" RV-2 D, E, F A

10,11)

TR22 11"9 19*

45*S 16" RV-2 D,E,F A

(6) Intermediate-to-TR23 11"9 19" 45'S 16" RV-2 D, E, F A

Lower Shell (#3)

TR24 11"9 19' 45"S 16" RV-2 D,E F A

4 TR25 li"9 23.5*

60*S 16.5" RV-2 D, E, F A

2' (7) Lower Shell Longi-TR26 11"9 23.5*

60*S 16.5" RV-2 D, E, F A

tudinal (#12, 13, TR27 11"9 23.5*

60*S 16.5" RV-2 D,E,F A

l 14)

TR28 11"9 23.5*

60*S 16.5" RV-2 D, E F A

l-l COMANCHE PEAK UNIT 1 i

10 YEAR PLATE a

l CALIBRATION REQUIREMENTS

! i

'i Transducer Incident Refracted Water Calibra tion Calibra tion Examination Area I.D.

Size Angle Angle Path Blocks Reflectors Surface j($) Lower Shell-to-

'TR20 11"0 0*

0*L 15" RV'-3 '

A,B,C A

1 i

<H2ad (#4) (From TR21 11"0 19' 45*S 16" RV-3 D E.F A

H2ad Side)

TR22 11"0 19" 45'S 16" RV-3 D, E, F A

! (9) Bottom Head TR23 ll"0 19' 45'S 16" RV-3 D,E,F A

i Meridional Welds TR24 11"0 19' 45'S 16" RV-3 D, E, F A

(#15,16,17,&

TR25 li"0 23.5*

60*S 16.5" RV-3 D, E, F A

4 18)

TR26 11"9 23.5*

60"S 16.5" RV-3 D E,F A.

j, TR27 11"0 23.5*.

60'S 16.5" RV-3

0. E, F A

TR28 11"0 23.5*

60*S 16.5" RV-3 D, E, F A

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COMANCHE PEAK UNIT 1 40 MONTH PLATE 3

CALIBRATION REQUIREMENTS S

Examination Transducer.

Incident Refracted Water Calibration Calibration Area I.D.

Size Angle Angle Path Block Reflectors Surface i.(1) Vessel Flange TR9 11"9 0*

0*L 11.5" RV-7 D,E,F C

to-Shell (#1)

TRIO,

11"9 3*

12*L 11.5" RV-7 D, E F C

14"9 1.5*

6*L 11.5" RV-7 D,E,F C

(from Seal TRll Surface)

TR12 li"9 4'

,16*L 11.5" RV-7 D,E,F C

l TR6 li"9

.l.5*

6*L 11.5" RV-7 D, E F C

t

('2) Vessel Flange LOO 1"x0.5" 0*

0*L 10.0" RV-5 C, B, D D

i Ligaments (1 to 54)

{'3)OutletNozzle-TRS 11"9 0*

0*L 11.0" RV-7 A, B, C A

l to-Shell Welds TR6 11"9 1.5*

6.0*L 11.0" RV-7 A

B, C A

(#19,22,23, 26) lI

! (4) Inlet Nozzle-to-TR6 li"9 1.5*

6*L 11.0" RV-7 A, B, C A

i Shall Welds (#20. TR13 11"9 5*

20*L 11.0" RV-7 A, B, C A

i 21,24,25)

TR14 11"9 19' 45'S 11.2" RV-7 A,B,C A

i

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(5) Outlet Nozzle Protrusions (#19, 22,23,26)

TR7 11"9 23.5*

60*

12.0" RV-1 JK A

(6) Inlet Nozzle TR8 11"9 23.5*

60*

12.0" RV-1 JK A

Radius (#20, 21, 24,25) 1

' [7) Outlet Nozzle-to-TRO 3/4"9 0'

0*L 4.25" RV-6 A,B,C A

i Safe End (#29, TR1 3/4"9 9.5*

41*L,

5.1" RV-6 A,B,C A

32,33,36)

TR2 3/4"9 9.5*

41*L 5.1" RV-6 A,B,C A

l8) Inlet Nozzle-to-TR3 3/4"9 9.5*

41*L 4.7" RV-6 A, B, C A

j Safe End (#30 TR4 3/4"9 9.5*

41*L-4.7" RV-6 A,B,C A

j 31,34,35) i

e s

e COMANCHE PEAK UNIT 1 NEAR SURFACE PLATE CALIBRATION REQUIREMENTS l

Transducer Incident Refracted Water Calibration Calibration Examination Area I.D.

Size Angle Angle Path Block Reflectors Surface 1

(1) Intermediate Shell Longitudinal (#9, 10, 11)

ADI 1" Dual

. 12.5*

60*L 6"

RV-1 G.H.J A

(2) Intermediate-to-AD2 1" Dual 12.5" 60*L 6"

RV-1 G, H,,J A.

)

Lower Shell (#3)

AD3 1" Dual 12.5*

60*L 6"

RV-1 G.H,J A

(3) Lower Shell AD4 1" Dual 12.5*

60*L 6"

RV-1 G,H J A

Longitudinal l

(#12,13,14) i 4

i 0

l

..<.--u TEXAS UTILITIES SERVICES

., Comanche Peak Nuclear Power Plant Unit #1 i

i

~

Preservice Examination Program All items listed below are to be examined, as indicated, in accordance with the i

requirements 4f. the 1980 Edition Section XI of the ASME Boiler and Pressure Vessel Code to the extent practical with the access provided and the limitations of com-ponent geometry, i

PROGRAM IWB-1500-1 EXAMINATION SKETCH ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE VOL SURF VIS REACTOR VESSEL Bl.10 Shell Welds 1

Bl.11 Circisnferential Welds 2,3 & 4 154 1-1100 Weld 4 206 2

Bl.12 Longitudinal Welds 6,7,8,9,10, 154 1-1100 11,12.13 & 14 Bl.20 Head Welds 1-1100 3

Bl.21 Circumferential Weld 5 47

('

1-1300 4

Bl.21 Circumferential Weld 2 47 1-1100 5

B1.22 Meridional Welds 15,16,17 & 18 154 1-1300-6 ~

Bl.22 Meridional Welds 3,4,5 & 6 47 1-1100 7

Bl.30 Flange to Vessel Weld 1 154 1-1300 8

Bl.40 Closure Head to Flange Weld 1 47 70 B1.50 Repair Welds 9

Bl.51 Beltline Region (1) 1-1100 1-1100 10 B3.90 Outlet nozzle to Vessel Welds 154 19,22,23 and 26 1-1100 11 B3.90 Inlet nozzle to Vessel Welds 154 20,21,24 and 25 12 B3.100 Outlet Nozzle Inside Radius Done in conjunction 1-1100 Section with B3.90

(

13 B3.100 Inlet Nozzle Inside Radius Done in conjunction 1.-1100 Section with B3.90 S

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PROGRAM IWB-1500-1 EXAMINATION SKETCH

("

ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE'

' REFERENCE VOL SURF VIS (2) 14 84.10 Partial Penetration Welds

~ '.11 Vessel Nozzles (2)

B4 15 (2) 16 B4.12 Control Rod Drive Nozzles (2) 17 B4.13 Instrumentation Nozzles 154 18 B5.10 Outlet Nozzle to Safe End Weld

/

11 1-4100 206 1(DM) 154 19 B5.10 t Nozzle to Sgfe End Weld

/

11 1-4200 206 154 1-4300 20 B5.10 Outlet Nozzle to Safe End Weld

/

11 206 1(DM) 154 1-4400 21 B5.10 Outlet Nozzle to Safe End Weld

/

11 206 g

1(DM) 4 154 1-4100 22 B5.10 Inlet Nozzle to Safe End Weld

/

11 206 14(DM)

{

154 1-4200 23 B5.10 Inlet Nozzle to Safe End Weld 7 06.))

14(DM) 154 1-4300 11 24 B5.10 Inlet Nozzle to Safe End Weld

/206 14(DM) 154 1-4400 25 B5.10 Inlet Nozzle to Safe End Weld

/

11 206 14(DM)

~

26 B6.10 Closure Head Nuts 1 thru 54

' 70 1-1400 27 B6.20 Closure Head Studs, in place (10) 1-1400 28 B6.30 Closure Head Studs (when 15 70 removed) 1 thru 54 1-1100 29 B6.40 Threads in Flange 1 thru 54 154 6

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..,.%.. =...,

,.,,.,,m_

m:.z

.n m ostretive Oniy TBX-1-1100

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REAC-OR VESSEL Flange Ligaments 1 thru 54 (Ref.1-1100A) l Nozzle to Vessel k

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([ Welds (Ref.1-1100A)

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T=11.8" 7

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(162*),

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l 16 8l l

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8 (240*)g y

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T=9.6"

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T=9.6" O

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.(330*)l

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L 3_

0*) (90*) \\

15 16 17 18 l'

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(180*f

.(270*

Welds 4,5,15,16,17 & 12 6.3"T SA533 Gr. A C1.1

---g-j--'-

Carbon Steel I

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e WESTINGHOUSE ELECTRIC CORPORATION 7 3X-l-1 IOOA ILLUSTRATIVE ONLY REACTOR;3(ESSEL NOZZLES TO VESSEL Loo) 4 i

~ Inlet tozzle l

. 1 4400 67*

Loop 3 Inlet Nozzle 99 113 1-4300 1,3. &,14(DM) 98 21 13 & 14(DM) 20

29 1-4400 19 1(DM) & 2 22

27 158' 22 Loop 3 Loop 4 Outlet Nozzle Outlet Nozzle 1-4300 1(DM) & 2 d

Y 180*

30 0'

26 "

338*

Loop 1 202*

Outlet Nozzle Loop 2 Outlet Nozzle 1-4100 e

1(m) & 2

/

1-4200

34 25 1(DM) & 2

31 Loop 2 l-4100 13 & 14(DM) 293*

270 247* Inlet Nozzle

33 Loop I Inlet Nozzle 1-4200 Flange Ligaments 13&14(DM)

32

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Reference for

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Remote Tool i

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Examinations l,

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ATTACHMENT 2 e

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e TEXAS UTILITIES SERVICES INCORPORATED Comanche Peak Unit 2 REACTOR VESSEL EXAMINATION PROGRAM May 6, 1983

=~ n h PREPARED D. C. Adamonis Metallurgical & NDE Analysis APPROVED:

h s

=

G.Y. Efthymfou, Manager C

Inspection Service 1

R. M. Joh on, Coordinator Inspect' n Service 8

l FOR:

Texas Utilities Services Incorporated O

c

i TEXAS UTILITIES SERVICES INCORPORATED Comanche Peak Unit 2 Reactor Vessel Preservice Examination Program This examination program plan and procedures incorporated herein are in accordance with the 1980 Edition of Section XI of the ASME Boiler and Pressure Vesset Code. The areas listed below shall be examined to the maximum extent practical per this program plan utilizing the Westinghouse reactor vessel examination tool.

Vessel / Tool Interface Parameters (1) Tool zero leg to be aligned at vessel O' (keyway #2) for vessel weld examinations. Tool zero leg to be aligned at vessel O' (keyway #2) and 180* (keyway #4) for examinations of vessel flange ligaments and for examinations of the vessel flange-to-upper shell weld from the flange seal surface.

(2) Closure head guide studs located at stud hole positions #12, #28, and

44 are not used. Stud holes located on 191.875" bolt circle diameter, numbered clockwise starting at #1 at 270' vessel axis.

(3) All dimensions are referenced from the top of the vessel flange and j

from 0* vessel axis.

Examination Requirements i

l Examine 100% of the following areas of the Comanche Peak Unit 2 reactor vessel to the maximum extent practical.

l l

-.4

~V The intermediate-to-lower shell circumferential weld (weld #3) and longitudinal welds in the vessel intermediate shell course (welds #9, #10, and #11) and lower shell course (welds #12, #13, and #14) shall also be examined with the near surface examination fixture.

G 9

9 C

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EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 2 ITEM CATEGORY DESCRIPTION W WELD ID

-W SKETCH IWB 2500-1 EXAMINATION TCX i

Bl.10 B-A Reactor Vessel Shell Welds Bl.ll B-A Upper-to-Intermediate. Shell Weld 2

1-1100 Located at 127.2" i

0' to 360*

}

Bl.11 B-A Intermediate-to-Lower Shell Weld 3

1-1100 Located at 235.1"-

0* to 360' Bl.11 B-A Lower Shell-to-Lower Head Weld 4

1-1100 Located at 342.53" 0' to 360 Bl.12 B-A Upper Shell Longitudinal, Welds l

Length - 27.87" to 127.2" i

Located at 56' 6

1-1100 Located at 176*

7 1-1100 Located at 296' 8

1-1100 Bl.12 B-A Intermediate Shell Longitudinal Welds l

Leng'th - 127.2" to 235.1" Located at O' 9

1-1100 Located'at 120' 10 1-1100 Located at 240 11 1-1100 Bl.12 B-A Lower Shell Longitudinal Welds Length - 235.1" to 342.53" Located at 90' 12 1-1100 Located at 210*

13 1-1100 Located at 330' 14 1-1100 l

)

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EXAMINATION AREAS - COMANCHE FEAK UNIT NO. 2 i

j IWB 2500-1 EXAMINATION

-W SKETCH ITEM CATEGORY DESCRIPTION W WELD ID TCX Bl.20 B-A Bottom Head Welds Bl.21 B-A Meridional Section-to-Dollar 5

1-1100 Plate Weld (Inaccessible due to instrument nozzles)

Bl.22 B-A Meridional Welds l

Length - 342.53" to 371.80" (Balance inaccessible due to instrument nozzles)

I Located at 0*

15 1-1100 Located at 90*

16 1-1100 Located at 180' 17 1-1100 Located at 270*

18 1-1100 1

i l

4

+

4

e EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 2 i

IWB 2500-1 EXAMINATION

-W SKETCH ITEM CATEGORY DESCRIPTION W WELD ID TCX Bl.30 B-A Flange-to-Upper Shell Weld 1

1-1100 Located at 27.87" A.

Examine from vessel'ID, reactor vessel shell side, 0* to 360*.

B.

Examine from flange seal surface.

e With tool at 0* vessel axis:

43.33' to 76.67*

163.33' to 196.67*

283.33' to 316.67*

e With tool at 180* vessel axis:

196.67* to 283.33' i

316.67" to 43.33*

76.67* to 163.33'

'I i

e

2 EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 2 8

IWB 2500-1 EXAMINATION W SKETCH ITEM CATEGORY DESCRIPTION W WELD ID

' TCX 1

B3.90 B-D Outlet Nozzle-to-Upper Sheld Welds Located at 85.5" I

22' nozzle 19 1-1100 158' nozzle 22 1-1100 202' nozzle 23 1-1100 338* nozzle 26 1-1100 B3.90 B-D Inlet Nozzle-to-Upper Shell Welds Located at 85.5" 67' nozzle 20 1-1100 113' nozzle 21 1-1100 i

247' nozzle 24 1-1100 l

293* nozzle 25 1-1100 B3.100 B-D Nozzle Inside RadiusSection I

e Examine nozzle protrusion area for outlet nozzles 19, 22, 23, l

and 26 and inside radius section i

for inlet nozzles 20, 21, 24, j

and 25 t

1 i

i'

EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 2 8

s IWB 2500-1 EXAMINATION W SKETCH ITEM CATEGORY DESCRIPTION W WELD ID

- TCX i

B5.10 B-F Outlet Nozzle-to-Safe End and I

Safe End-to-Pipe Welds 1

4 e Located 120.58" and 123.08"

~

i from vessel centerline.

22 nozzle 27 1-1100 158* nozzle 30 1-1100 202" nozzle 31 1-1100 i

338* nozzle 34 1-1100 85.10 B-F Inlet Nozzle-to-Safe End and Safe End-to-Pipe Welds e Located 127.34" and 131.22" from vessel centerline.

67* nozzle 28 1-1100 113* nozzle 29 l-1100 i

247' nozzle 32

'l-1100 1

293* nozzle 33 1-1100 i

E e

e

1 l

l i

EXAMINATION AREAS - COMANCHE PEAK UNIT NO. 2 l

-s IWB 2500-1 EXAMINATION

-W SKETCH DESCRIPTION W ID TCX-ITEM CATEGORY B6.40 B-G-1 Vessel Flange Ligaments e With tool at O' vessel axis:

50' to 70' 40-43 1-1100 170' to 190*

22-25 1-1100 290' to 310*

4-7 1-1100 o With tool at 180' vessel axis:

196.67* to 283.33' 44-3 1-1100 316.67' to 43.33*

8-21 1-1100 76.67 to 163.33*

26-39 l-1100 4

PROGRAM REQUIREMENTS Procedures (1) Westinghouse Procedure 151-154, Revision 1, "Preservice and Inservice Inspection of Reactor Vessels", dated March 16, 1983 shall be used for automated examinations with the Westinghouse reactor vessel examination tool.

Specific Operational Requirements The following criteria shall be input to the Sonic Mark VI Ultrasonic System for calibration and vessel examination.

~

(1) Pulse repetition rate - 250 Hz (minimum).

(2) Pulses / Channel - 3.

(3) Alarm Count - 3 (maximum).

l (4). All vessel weld examinations are performed with 2.25 MHz transducers.

(5) Vessel flange ligament examinations are performed with a 5.0 MHz transducer.

(6) Angle beam examinations of n'ozzle-for-safe end welds are performed with 1.0 MHz transducers.

Calibrations and examinations shall be performed utilizing search unit sizes refracted angles, and incident angles as defined in the following tables.

l Detailed parameters for the examination of each. individual weld or area, including the location of each scan with reference to the vessel axis and datums, the number of scan increments, and the incremental distances between scans are defined in the inspection program input data prepared in accordance with f

Westinghouse Procedure, RV-ISI-01, Revision 1.

1 COMANCHE PEAK UNIT 2 10 YEAR PLATE CALIBRATION REQUIREMENTS i

l Transducer Incident Refracted Water Calibration Calibration l

Examination Area I.D.

Size Angle Angle Path Block Reflectors Surface (1) Vessel Flange-to-TR20 11"0 0'

0'L 15" RV-1 A,B,C A

Shell (#1) (From TR21 li"0 19' 45'S 16" RV-1 D,E F A

i Shell Side)

TR22 l}"O 19' 45'S 16" RV-1 D, E, F A

t 19' 45'S 16" RV-1 D,E,F A

(2) Upper Shell Longi-TR23 11"0 tudinal (#6, 78)

TR24 11"0 19' 45'S 16" RV-1 D, E, F A

TR25 11"0 23.5' 60*S 16.5" RV-1 D,E,F A

TR26 11"O 23.5*

60*S 16.5" RV-1 D. E, F A

TR27 11"O 23.5' 60'S 16.5" RV-1 D, E, F A

TR28 11"O 23.5' 60'S 16.5" RV-1 D, E, F.

A (3) Upper-to-Interme-TR20 11"0 0'

OL 15" RV-2 A,B,C A

diate Shell (#2)

TR21 11"0 19*.

45'S 16" RV-2 D, E, F A

i TR22 li"0 19' 45*S 16" RV-2 D, E, F A

(4) Lower Shell-to-TR23 11"O 19' 45'S 16" RV-2 D,E,F A

Head (#4) (From TR24 11"0 19' 45 S 16" RV-2 D, E, F A

)

Shell Side)

TR25 11"0 23.5' 60*S 16.5" RV-2 D,E,F A

TR26 li"0 23.5' 60 S 16.5" RV-2 D, E, F A

j TR27 li"0 23.5*

60*S 16.5" RV-2 D, E, F A

TR28 16"O 23.5' 60*S 16.5" RV-2 D, E, F A

4 l

(5) Intermediate Shell TR20 11"O 0*

0*L 15" RV-2 A,B,C A

j Longitudinal (#9,

.TR21 li"0 10' 45'S 16" RV-2 D, E, F A

10,11)

TR22 li"0 19' 45*S 16" RV-2 D,' E, F A

{

(6) Intermediate-to-TR23 11"0 19' 45 S 16" RV-2 D, E, F A

Lower Shell (#3)

TR24 11"0 19' 45"S 16" RV-2 D,E,F A

TR25 11"0 23.5*

60*S 16.5" RV-2 D, E, F A

j (7) Lower Shell Longi-TR26 11"O 23.5' 60*S 16.5" RV-2 D, E, F A

tudinal (#12, 13, TR27 11"O 23.5' 60 S 16.5" RV-2 D,E,F A

14)

TR28 li"0 23.5*

60 S 16.5" RV-2 D,E,F A

i 4

4 COMANCHE PEAK UNIT 2 10 YEAR PLATE CALIBRATION REQUIREMENTS i

Transducer Incident Refracted Water Calibration Calibration Examination Area I.D.

Size Angle Angle Path Blocks Reflectors Surface (8) Lower Shell-to-TR20 11"0 0*

0L 15" RV-3 A,B,C A

Head (#4) (From TR21 11"0 19" 45*S 16" RV-3 D, E, F A

Head Side)

TR22 11"0 19*

45'S 16" RV-3 D, E, F A

(9) Bottom Head TR23 11"0 19' 45*S 16" RV-3 D,E,F A

Meridional Welds TR24 11"0 19*

45*S 16" RV-3 0, E, F A

(#15,16,17,&

TR25 11"0 23.5*

60*S 16.5" RV-3 D, E, F A

18)

TR26 li"0 23.5*

60*S 16.5" RV-3 D, E, F A

TR27 11"0 23.5*

60 S 16.5" RV-3 0, E, F A

TR28 11"0 23.5*

60*S 16.5" RV-3 D, E, F A

i 4

1 9

6 4

w

l

}

l

~

COMANCHE PEAK UNIT 2 1

40 MONTH PLATE CALIBRATION REQUIREMENTS 1

i j 3

Examination Transducer Incident Refracted Water Calibration Calibration i,

Area I.D.

Size Angle Angle Path Block Reflectors Surface t

i (1) Vessel Flange TR9 11"9 0*

0*L 11.5" RV-7 0, E, F C

j to-Shell (#1)

TRIO 11"9 1.5' 6*L 11.5" RV-7 D, E, F C

(from Seal TRll 11"9 3*

12"L 11.5" RV-7 D, E, F C

I Surface)

TR12 11"9 4'

16*L 11.5" RV-7 D, E, F C

TR6 11"9 1.5' 6*L 11.5" RV-7 D,E,F C

(2) Vessel Flange LOO 1"x0.5" O'

0* L' 10.0" RV-5 C,B,D D

~

Ligaments j

j (1 to 54) 4 l

(3) Outlet Nozzle-TRS 1}"9 0*

0*L 11.0" RV-7 A,B,C A

i to-Shell Welds TR6 li"9 1.5*

6.0*L 11.0" RV-7 A, B, C A

(#19,22,23, 26)

(4) Inlet Nozzle-to-TR6

~11"9 1.5' 6*L 11.0" RV-7 A,B,C A

Shell Welds (#20, TR13 11"9 5'

20*L 11.0" RV-7 A, B, C A

21,24,25)

TR14 11"9 19' 45'S 11.2" RV-7 A, B, C A

(5) Outlet Nozzle Protrusions (#19, 22,23,26)

TR7 li"9 23.5*

60*

12.0" RV-1 J, K A

l (6) Inlet Nozzle.

TR8 1}"9 23.5' 60' 12.0" RV-1 J, K A

Radius (#20, 21, 24,25) i (7) Outlet Nozzle-to-TRO 3/4"9 0*

0*L 4.25" RV-6 A, B, C A

l Safe End (#29, TR1 3/4"9 9.5' 41"L 5.1" RV-6 A,B,C A

32,33,36)

TR2 3/4"9 9.5*

41*L-5.1 "

RV-6 A,B,C A

l (8) Inlet Nozzle-to-TR3 3/4"9 9.5*

41*L 4.7" RV-6 A,B,C A

Safe End (#30 TR4 3/4"9 9.5' 41*L 4.7" RV-6 A,B,C A

I 31,34,35) i l

4 COMANCHE PEAK UNIT 2 NEAR SURFACE PLATE CALIBRATION REQUIREMENTS 4

i Transducer Incident Refracted Water Calibration Calibration l

Examination Area I.D.

Size Angle Angle Path Block Reflectors Surface

-j l

(1) Intermediate Shell e ~

Longitudinal (#9, i

10,11)

AD1 1" Dual 12.5*

60*L 6"

RV-1 G,H.J A

(2) Intermediate-to-AD2 1" Dual 12.5' 60 L 6"

RV-1 G,H,J A

Lower Shell (#3)

AD3 1" Dual 12.5" 60 L 6"

RV-1 G,H.J A

i (3) Lower Shell AD4 1" Dual 12.5' 60 L 6"

RV-1 G,H,J A

Longitudinal l

(#12,13,14) 4 t

c t

N- -- v TEXAS UTILITIES SERVICES Comanche Peak Nuclear Power Plant Unit #2 Preservice Examination Program All items listed below are to be examined, as indicated, in accordance with the requirements.of. the 1980 Edition Section XI of the ASME Boiler and Pressure Ves Code to the extent practical with the access provided and the limitations of com-ponent geometry.

EXAMINATICN SKETCH PROGRAM IWB-1500-1 PROCEDURE REFERENCE ITEM REFERENCE AREA TO BE EXAMINED VOL SURF VIS_

REACTOR VESSEL 1),1,10 Shell Welds 1-1100 1

Bl.11 Circumferential Welds 2,3 & 4 154 Weld 4 206 1-1100 2

Bl.12 Longitudinal Welds 6,7,8,9,10, 154 11,12.13 & 14 B1.20 Head Welds 1-1100 3

B1.21 Circumferential Weld 5 47 1-1300

(

Circtnferential Weld 2 47 4

Bl.21 1-1100 5

Bl.22 Meridional Welds 15,16,17 & 18 154 1-1300 6

Bl.22 Meridional Welds 3,4,5 & 6 47 1-1100 154 7

Bl.30 Flange to Vessel Weld 1 1-1300 Closure Head to Flange Weld 1 47

. 70 8

B1.40 B1.50 Repair Welds 1-1100 9-Bl.51

~ Beltline Region (1) 1-1100 Outlet nozzle to Vessel Welds 154 10 B3.90 19,22,23 and 26 l

1-1100 Inlet nozzle to Vessel Welds 154 11 B3.90 20,21,24 and 25 l

Done in conjunction 1-1100 12 B3.100 Outlet Nozzle Inside Radius with B3.90 Section Done in conjunction 1-1100 l

13 B3.100 Inlet Nozzle Inside Radius with 83.90 Section O

v

l PROGRAM IWB-1500-1 EXAMINATION SKETCH ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE 1

VOL SURF VIS (2) 14 B4.10 Partial Penetration Welds (2) 15 B4.11 Vessel Nozzles *

(2) 16 B4.12 Control Rod Drive Nozzles (2) 17 B4.13 Instrumentation Nozzles 154 18 B5.10 Outlet Nozzle to Safe End Weld

/

11 1-4100 i

206 1(DM)

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/

11 1-4200 154 206 I

1(DM) 154 20 B5.10 Outlet Nozzle to Safe End Weld

/

11 1-4300 206 1(DM) f 154 21 B5.10 Outlet Nozzle to Safe End Weld

/

11 1-4400 206 1(DM) 154 22 B5.10 Inlet Nozzle to Safe End Weld

/

11 1-4100 206 14(DM) k 23 B5.10 Inlet Nozzle to Safe End Weld

/

11 154 1-4200 206 14(DM) 154 24 B5.10 Inlet Nozzle to Safe End Weld

/

11 1-4300 206 14(DM)

~

154 1-4400 25 B5.10 Inlet Nozzle to Safe End Weld

/

11 14(DM)

(

26 B6.10 Closure Head Nuts 1 thru 54 1-1400 70 27 B6.20 Closure Head Studs, in place (10) 1-1400 28 B6.30 Closure Head Studs (when 15 70 removed) 1 thru 54 1-1100 29 B6.40 Threads in Flange 1 thru 54 154 9

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O Westinghouse Water Reactor wear Semce D'v5'on ElectricCorporation.,

Divisions so,2ns Pittsturgn Pennsylvania,15230 EXAMINATION PROCEDURE:

15I-154 DATED:

OCTOBER 5,1982 l

PLANT SITE:

GENERAL UTILITY:.

GENERAL PROCEDURE TITLE:

PRESERVICE AND INSERVICE INSPECTION OF REACTOR VESSELS REVISION O DATED:

OCTOBER 5,1982 REVISION 1 DATED:

MARCH 16,1983 l

PREPARED BY:

l D. C. Adamonis, Level III REVIEWED BY:

B. VLefebv4, Level III Inspection Service b

$g@

APPROVED BY:

J. A. Vano,' Manager Pf*h ()

Inspection Service

N1 7 46M830318-1 "S*"l54Rev.1 I

INDEX

,1.0 PURPOSE 2.0 SCOPE-3.0 EQUIPMENT 4.0 PERSONNEL REQUIREMENTS 5.0 INSTRWMENT PERFORMANCE CHECKS 6.0 SYSTEM CALIBRATION 7.0 EXAMINATION REQUIREMENTS 8.0 INTERPRETATION AND INVESTIGATION 9.0 RECORDING REQUIREMENTS 10.0 EXAMINATION RECORDS i

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N " October 5, 1982 1

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N167M/46M830318-2 NUMBEW & LEU ISI-154 Rev. 1 PRESERVICE AND INSERVICE INSPECTION OF REACTOR VESSELS 1.0 PURPOSE f

1.1 This document describes the equipment, calibration sequence, examination techniques, and recording requirements for preservice and inservice inspection of a reactor vessel with the remotely operated inspection tool.

All operations described herein are intended to satisfy volumetric examination requirements of Section XI of the ASME Boiler ar.d Pressure Vessel Code.

Procedure RV-ISI-01, " Reactor Vessel Examination Program Preparation and Documentation," is considered part of this procedure and should be used as applicable.

2.0 SCOPE 2.1 This document provides general requirements for staight and angle beam immersion ultrasonic examinations of pressure retaining carbon and low alloy steel welds, nozzle safe end welds, heat affected

~

zones, specified base material, and weld repairs to base material which exceed 10% of the nominal wall thickness in the reactor vessel beltline regions.

2.2 Specific calibration and examination requirements, i.e., areas selected for examination, extent of examination, search unit sizes, angles, calibration standards, and water path distances, are defined in the plant specific Examination Program Plan.

3.0 EQUIPMENT 3.1 Examinations shall be performed using pulse-echo and/or transmit-receive techniques with immersion water path coupling using the equipment listed below.

October 5, 1982 2

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N167M/46M830318-3 ISI-154 Rev. 1 3.1.1 Sonic Multichannel Time - Amplitude Ultrasonic System, 1

consisting of the following modules and interconnects:

4 -

Pulser / Preamps Mark VI Mainframe /CRT Mark VI Receiver Mark VI Interface System Controller Hardcopy Controller Gate Monitor Two Tektronix 613 Storage Scopes Data Display Tektronix 4613 Hardcopy Printer Power Suppliers Serial Data Link RG-174 Cable, 23 ft.

Four Tektronix 2213 Auxiliary Displays 3.1.2 Westinghouse Computer System Model 2500 3.1.3 Westinghouse MK-1 Electronic Block Simulator (EBS) 3.1.4 Harrisonic Transducers 2.25 MHz, 1.50 inches diameter 2.25 MHz, 0.75 inches diameter 1.0 MHz, 1.50 inches diameter 1.0 MHz, 0.75 inches diameter 3.1.5 Transducer array plates and transducer mounting assemblies 3.1.6 Calibration tank and manipulator 3.1.7 Calibration block 3.1.8 Mechanical Transfer Standard (MTS) 3.2 Other transducers, calibration standards, and/or equipment may be used for special applications or where metallurgical characteristics or geometry preclude effective use of the equipment described above. These parameters shall be defined in the Examination Program Plan.

E[r's"**

October 5, 1982 3

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I NUMBER & REV.

N167M/46M830318-4 ISI-154 Rev. 1 4.0 PERSONNEL REQUIREMENTS 4.1 Ultrasonic test operators performing activities per this procedure shall be quali.fied and certified Level II or Level III per y PA 10.1 or equivalent procedure based on SNT-TC-1A, Supplement C.

Individuals qualified and certified Level.I'or Level I Trainees per y PA 10.1 may perform these activities under direct supervision of a Level II or Level III. All recordable indications shall be evaluated by a Level II or Level III individual.

5.0 INSTRUMENT PERFORMANCE CHECKS 5.1 Instrument screen height linearity and amplitude control linearity shall be verified prior to the performance of any system calibra-tions and at the beginning and end of the examination period. The same EBS signal response (s) shall be used for the initial determination and subsequent field checks.

5.2 The ultrasonic instrument shall be verified as having a linear vertical presentation within + 5% of the full screen range for at least 80% of the calibrated screen height in accordance with the following steps.

5.2.1 Utilizing the EBS and any given channel of the Sonic l

System obtain two EBS pulses on the CRT.

5.2.2 Adjust the EBS controls and the receiver gain control to i

set the first indication to 80% full screen height (FSH) and the second indication at 40% FSH.

5.2.3 Without changing the EBS controls, adjust the receiver gain to sequentially set the larger indication from 100%

l l

to 20% FSH in 10% increments.

Record the smaller l

indication amplitude at each setting.

Estimate the readings to the nearest 1% FSH.

o[rs October 5, 1982 4

70 o,'[g

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I N167M/46M830318-5 NUMBER & CEU.

ISI-154 Rev. 1 5.2.4 The reading must be 50% of the larger amplitude, within 3 5% FSH.

5.2.5 Record all data and instrument settings on the appropriate data sheet.

5.3 The accuracy of the amplitude control of the ultrasonic system shall be verified as being within 1 20% of the nominal amplitude ratio over its useful range in accordance with the following steps.

5.3.1 Utilizing the EBS and any given channel of the Sonic System obtain an EBS pulse on the CRT.

5.3.2 Adjust the receiver gain to set the indication to 80%

FSH.

Record the receiver. gain setting.

5.3.3 Decrease the receiver gain by 6dB and record the signal amplitude.

5.3.4 Decrease the receiver gain again by 6dB and record the signal amplitude.

5.3.5 Adjust the receiver gain to set the indication to 40%

FSH.

Record the receiver gain setting.

5.3.6 Increase the receiver gain by 6dB and record the signal amplitude.

i 5.3.7 Adjust the receiver gain to set the indication to 20%

FSH.

Record the receiver gain setting.

5.3.8 Increase the receiver gain by 12dB and record the signal amplitude.

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5.3.9 Recorded readings must be within the following limits:

Indication Set at dB Control Indication Limits

% of FSH Change

% FSH 80%

-6dB 32 to 48%

80%

-12dB-16 to 24%

40%

+6dB 64 to 96%

20%

+12dB 64 to 96%

5.3.10 Record all data and instrument settings on the appropriate data sheet.

5.4 Verification of performance of the field system calibration checks shall be documented.

Documentation shall include the date, time, and the initials of the operator.

5.5 When specifically requested, a photographic record of the RF pulse waveform shall be obtained for each transducer, before and after each vessel examination.

6.0 SYSTEM CALIBRATION 6.1 Calibration Requirements - General System calibration shall be performed at the Westinghouse Waltz Mill Site.

6.1.1 Calibration shall include the complete ultrasonic system using responses from reflectors in the basic calibration block (s).

6.1.2 Basic calibration blocks used for calibration of the ultrasonic system shall be defined by the plant specific Examination Program Plan and shall meet the following requirements.

8 DA E October 5, 1982 b,c, 6

70

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I N167M/46M830318-7 NUMBEQ & EEE 1S1-154 Rev. 1 6.1.2.1 The material from which the block (s) are fabricated shall be from one of the following:

(a) a nozzle dropout from the reactor vessel (b) a prolongation from the reactor vessel (c) material of the same general material specification product form, and heat treat-ment as one of the materials being joined.

6.1.2.2 Where the component material is clad, the block (s) shall be clad to the component clad nominal thickness.

Deposition of the cladding may be by an automatic or manual technique so long as the method represents, to the extent practical, the method used on the reactor vessel.

6.1.2.3 The calibration block shall receive at least the minimum tempering temperature treatment required by the material specification and a post weld heat treatment of at least two hours.

6.1.3 The block (s) shall be placed in the calibration tank and carefully leveled and aligned.

The zero degree index of the manipulator shall be defined.

6.1.4 Each calibration shall be performed from the calibration block surface, cla'd or unclad, corresponding to the surface of the component from which the examination will be performed.

6.1.5 During calibration the search unit centerline shall be at least 1-1/2 inches from the nearest side of the basic calibration block.

$ "*" October 5, 1982 7

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.I NUMBEC) & LEV.

Ni67M/46M830318-8 151-154 Rev. 1 6.1.6 The water temperature for calibration shall be within 25 F of the water temperature during scanning.

6.1.7 Transducers shall be calibrated in fixtures which provide the angle of incidence specified in the examination Program Plan. Upon completion of the calibration sequence the transducer / fixture assembly shall be mounted on the array plate at the specified location.

The orientation of the transducer with respect to the fixture shall not be changed. Bubbles shall not be present on the transducer face or the calibration block entry surface during the calibration sequence.

6.1.8 A calibration data sheet packet shall be completed for each transducer / instrument setting combination used to examine each volume required by the plant specific Examination Program Plan. All data will be fully recorded such that the operating parameters can be verified in the field. Calibration and examination data sheets are attached as Figures 1 through 6.

6.1.9 Measurements of beam spread shall be made for each transducer used during the inspection program.

These measurements shall be performed per paragraph 6.11.

These data will be included in the calibration data described in paragraph 6.1.8.

6.2 Calibration for Straight Beam Examination of Vertical and Circumferential Welds System calibration for each straight beam inspection channel /

transducer combination used for examination of ve'rtical and circumferential welds, including safe end welds and the flange-to-upper shell weld from the shell side, shall be performed as described below.

E[TE October 5, 1982 3,oe 8

70 o!Ue March 16, 1983 8

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I NUMBER & REV N167M/46M830318-9 ISI-154 Rev. 1 6.2.1 Attach the transducer to the appropriate'fix'ture for the required incident angle and mount the assembly on the manipulator in the calibration tank.

s 6.2.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.

6.2.3 Adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule.on the CRT.

6.2.3.1 Adjust the instrument range to the maximun achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen.

Record the transit time to the entry surface reflection.

6.2.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner, i

6.2.3.3 Determine the sound velocity and measure the water temperature.

Record these val'es.

u y _ Round Trip Distance Travel Time L

6.2.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

l l

l o5E October 5, 1982 g,,,

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70 o4[g March 16, 1983 l

T.NSID ou, N167M/46M830318-10 ISI-154 Rev. 1 6.2.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and block back surface reflection occupies 60% to 90% of the full sweep length.

6.2.4.2 Record the transit time between the entry surface reflection and the back surface reflection.

6.2.4.3 Calculate the sound velocity in the calibration block and record this value.

6.2.4.4 Adjust the selected gate controls to include all metal travel between the entry surface reflection and the back surface reflection.

6.2.5 Set the trace and gate baselines to zero percent.of scale.

6.2.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamp 11fier gain control to set the indication amplitude to 40% + ldB of full screen height. Mark the peak of the indication on the screen.

Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.

l 6.2.7 Without changing instrument settings move the transducer to obtain the maximum responses from the remaining calibration holes. Mark the peak of the indications on the screen.

Record the indication amplitudes and transit I

times from the water / steel interface to the indications.

t l

E5'e* October 5, 1982 10 70 o[e March 16, 1983

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N167M/46M830318-11 1S1-154 Rev. 1 6.2.8 Draw a line through the maximum response' points on the CRT The curve m'ay be extrapolated at either end for a screen.

distance of one quarter the thickness of the calibration block. This line represents the basic calibration distance amplitude curve (DAC).

6.2.9 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

6.2.10 The electr.onic DAC module function shall then be initiated.

6.2.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally.40% FSH.

6.2.10.2 Adjust the gate threshold (alarm level) to 16%

FSH and set for positive trigger.

6.2.10.3 Disable the EBS, scan the block, and observe.the responses from each applicable calibration reflector. The amplitude of each should be at 40% FSH (+ 2dB).

If not, review steps 6.2.1 through 6.2.10.3.

l 1

l 6.2.10.4 Decrease the receiver gain by 6dB.

Switch the system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.

The gate alarm shall actuate when the peak response from each hole is detected.

If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.

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October 5, 1982 11 70 o $"

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N167M/46M830318-12 ISI-154 Rev. 1 6.2.10.5 Increase the receiver gain by 6dB and record all pertinent calibration data on the calibration data sheets.

6.2.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.

Reflectors selected for this -step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.

6.3 Calibration for Angle Beam Examination of Vertical and Circumferential Vessel Welds System calibration for each angle beam inspection channel / transducer combination used for examination of vertical and circumferential vessel welds, including the flange-to-upper shell weld from the shell. side, shall be performed as described below.

6.3.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator $c the calibraticn tank.

6.3.2 Posi+5t-

'h+ 'cansducer to direct the sound beam toward the ag.propriot0 surface of the calibration block and adjust for the required waterpath.

6.3.3 Position the transducer to obtain a maximum response from the square notch on the opposite surface or the block corner and adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT.

se 75's "**

October 5, 1982 12 70

"'[g March 16, 1983

NUMBER & REU.

N167M/46M830318-13 ISI-154 Rev. 1 6.3.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen.

Record the transit time to the entry surface reflection.

6.3.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.

6.3.3.3 Determine the sound velocity and measure the water temperature.

Record these values.

y _ Round Trip Distance Travel Time i

6.3.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

6.3.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the notch response or the block corner response occupies 50% to 80% of the full sweep length.

6.3.4.2 Record the transit time between the entry surface reflection and the notch response or block corner response.

6.3.4.3 Calculate the sound velocity in the calibration block and record this value.

7[E '"' October 5, 1982 13 70

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NUMBER & EEU.

N167M/46M830318-14 151-154 Rev. 1 6.3.4.4 Position the transducer to obtain the maximum response from the 3/4T hole after the beam has bounced from the opposite surface (5/8 node response) and adjust the selected gate controls to include all metal travel between the entry surface reflection and this indication.

6.3.5 Set the. trace and gate baselines to zero percent of scale.

6.3.5 Position the tran5ducer to obtain the maximum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 80% + ldB of full screen height.

Mark the peak of the indication on the screen.

Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.

6.3.7 Without changing instrument settings move the transducer to obtain the maximum responses from the other calibration holes including the 5/8 node response from the 3/4T hole.

Mark the peaks of the indications on the screen.

Record indication amplitudes and transit times from the water / steel interface to the indications.

If the 5/8 node response from the 3/4T hole is not readily discernable, the DAC curve amplitude point shall be determined by calculating the dB difference between the 1/2T and 3/4T reflector amplitudes, decreasing the 3/4 T reflector amplitude by two times that difference, and marking the resulting amplitude at the point on the sweep that represents the transit time to the 5/8 node position.

6.3.8 Draw a line through the maximum response points on the CRT screen. The curve may be extrapolated at either end for a 14 70

$'Uf' March 16, 1983 ES's October 5, 1982 3,c, o,

i 1

I NE Nuussa a aew N167M/46M830318-15 ISI-154 Rev. 1 distance of one quarter the thickness of the calibration block. This line represents the basic calibration distance amplitude curve (DAC).

6.3.9 Without changing the instrument settings position the transducer to obtain a maximum response from the square notch on the opposite surface, if applicable.

Record the indication amplitude and transit time from the water / steel interface to the indication.

6.3.10 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

6.3.11 The electronic DAC module function shall then be initiated.

6.3.11.1 Adjust the electronic DAC controls so all EBS pulses at transit times from the entry surface reflection to and including the response from the 1/4T hole are nominally 80% FSH and those at transit times in excess of the 1/4T hole to the end of the gate are nominally 40% FSH.

6.3.11.2 Adjust the gate threshold (alarm level) to 16%

l FSH and set for positive trigger.

l 6.3.11.3 Disable the EBS, scan the block, and observe the responses from each appl.icable calibration reflector.

The amplitude of the 1/4T hole should be at 80% FSH 1 2dB and the amplitudes of the 1/2T, 3/4T, and 5/8 node response from l

the 3/4T hole should be at 40% FSH 2 2dB.

If not, review steps 6.3.1 through 6.3.11.3.

6.3.11.4 Decrease the receiver gain by 6dB.

Switch the system to the cycle mode and scan the transducer E[E ""'

October 5, 1982 15 70

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N167M/46M830318-16 ISI-154 Rev. 1 assembly over the calibration block at or greater than the specified examination speed.

The gate alarm shall actuate when the peak amplitude from each hole is detected.

Decrease the receiver gain by an additional 8dB and once

.again scan over the block at or higher than the specified examination speed. The alarm should actuate when the peak amplitude from the 1/4T hole is detected.

If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g.,

alarm count, repetition rate, alarm level, etc.)

which may require adjustment and make corrections, if necessary.

6.3.11.5 Increase the receiver gain by 14dB and record all pertinent calibration data on the calibration data sheets.

6.3.12 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the in.itial pulse.

Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.

l i

6.4 Calibration for Examination of the Flange-to-Upper Shell Weld From the Flange Seal Surface i

Complete coverage of the reactor vessel flange-to-upper shell weld from the seal surface typically requires interrogation by longitudinal waves at 0 and at one or two other angles.

The EEs* October 5, 1982

,,,c, 16 70

"'[a March 16, 1983 se oy

NUM ER & REY.

167M/46M830318-17 ISI-154 Rev. 1 specific angles depend on the vessel flange dimensions and design and are defined in the plant specific Examination Program Plan.

System calibration for each inspection channel / transducer combination shall be performed as described below.

6.4.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank.

6.4.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.

6.4.3 Adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT.

6.4.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen.

Record the transit time to the entry surface reflection.

6.4.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel l

time in microseconds can be read directly from j

the digital display. All transit time measurements can be made in this manner.

6.4.3.3 Determine the sound velocity and measure the water temperature.

Record these values.

i

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[EE October 5, 1982 go, o,

RE SE 17 70 March 16, 1983

I EU suu en a 4.ev.

167M/46M830318-18 ISI-154 Rev. 1 y _ Round Trip Distance Travel Time 6.4.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

6.4.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the reflection from the reference hole at the

~

longest test metal distance occupies 60% to 90%

of the full sweep length.

6.4.4.2 Record the transit time between the entry surface reflection and the reflection from the reference hole.

6.4.4.3 Calculate the sound velocity in the calibration block and record this value.

6.4.4.4 Adjust the selected gate controls to include all metal travel including the weld and specified adjacent base material on the shell and flange sides of the weld.

l 6.4.5 Set the trace and gate baselines to zero percent of scale.

l 6.4.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest l

amplitude. Adjust the preamplifier gain control to set the indication amplitude to 80% + IdB of full screen height. Mark the peak of the indication on the screen.

Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.

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N167M/46M830318-19 151-154 Rev. 1 6.4.7 Without changing instrument settings move the transducer to obtain the maximum responses from the remaining calibration holes. Mark the peak of the indications on the screen.

Record the indication amplitudes and transit times from the water / steel interface to the indications.

6.4.8 Draw a line through the maximum response points on the CRT screen. The curve may be extrapolated at either end for a distance of one quarter the thickness of the calibration block. This line represents the basic calibration distance amplitude curve (DAC).

6.4.9 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

6.4.10 The electron'ic DAC module function shall then be initiated.

6.4.10.1 Adjust the electronic DAC controls so.all EBS pulses are nominally 80% FSH.

6.4.10.2 Adjust the gate threshold (alarm level) to 16%

FSH and set for positive trigger.

6.4.10.3 Disable the EBS, scan the block, and observe the l

responses from each applicable calibration reflector.

The amplitude of each should be at 80% FSH + 2dB.

If not, review steps 6.4.1 through 6.4.10.3.

6.4.10.4 Decrease the receiver gain by 14dB.

Switch the system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.

The gate alarm shall actuate when the peak response from each hole is detected.

If the

,,c, 19 70

"'[s March 16, 1983 se E['s" October 5, 1982 c,

T NSID suo,,,,,,y.

167M/46M830318-20 151-154 Rev. 1 alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.

6.4.10.5 Increase the receiver gain by 14dB and record all pertinent calibration data on the calibration data sheets.

6.4.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.

Reflectors selected for this step shall provide transit times representative of those for the primary r.eflectors in the basic calibration block where practical.

6.5 Calibration for Examination of Nozzle-to-Shell Welds from the Nozzle Bore Complete coverage of nozzle-to-shell welds from the nozzle bore typically requires interrogation by longitudinal waves at one angle normal to the we.1d and at one other angle to account for geometry.

The specific angles required depend on the nozzle dimensions and design and are defined in the Examination Program Plan.

System calibration for each inspection channel / transducer combination shall be performed as described below.

6.5.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly to the manipulator in the calibration ~ tank.

'7**'

October 5, 1982 20 70

"'[s" March 16, 1983 3,c, o,

%Af NSIO NUMBER & REV.

N167M/46M830318-21 1S1-154 Rev. 1 6.5.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.

6.5.3 Adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT.

6.5.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen.

Record the transit time to the entry surface reflection.

6.5.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and. travel time in microseconds can be read directly from the digital display. All transit time.

measurements can be made in this manner.

6.5.3.3 Determine the sound velocity and measure the water temperature.

Record these values, y _ Round Trip Distance Travel Time l

6.5.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

6.5.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and E2d "** October 5, 1982 21 70

"'Eg*'

March 16, 1983 p,c, o,

e..

I UIO suusen a nev.

167M/46M830318-22 ISI-154 Rev. I the reflection from the reference hole at the longest test metal distance occupies 60% to 90%

of the full sweep length.

6.5.4.2 Record the transit time between the entry surface reflection and the reflection from the reference hole.

6.5.4.3 Calculate the sound velocity in the calibration block and record this value.

6.5.4.4 Adjust the selected gate controls to include all metal travel which will include the entire nozzle, the weld, and specified adjacent base material on the shell side of the weld.

Consult the Examination Program Plan to verify that this gate length will monitor the required examination volume.

6.5.5 Set the trace and gate baselines to zero percent of scale.

6.5.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 80% (+ ldB) of full screen height. Mark the peak of the indication on the screen.

j Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.

6.5.7 Without changing instrument settings move the transducer to obtain the maximum responses from the remaining calibration holes. Mark the peak of the indications on E[rg October 5, 1982

,,oe 22 70 o$UE March 16, 1983 S

or

%AP NSID NUMBER & REV.

N167M/46M830318-23 1S1-154 Rev. 1 the screen.

Record the indication amplitudes and transit times from the water / steel interface to the indications.

6.5.8 Draw a line through the maximum response points on the CRT screen.

The curve may be extrapolated at either end for a distance of one quarter the thickness of the calibration block. This line represents the basic calibration distance amplitude curve (DAC).

6.5.9 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

6.5.10 The electronic DAC module function shall then be initiated.

6.5.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally 80% FSH.

6.5.10.2 Adjust the gate threshold (alarm level) to 16%

FSH and set for positive trigger.

6.5.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector.

The amplitude of each should be at 80% FSH + 2dB.

If not, review steps 6.5.1 through 6.5.10.3.

6.5.10.4 Decrease the receiver gain by 14dB.

Switch the system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.

The gate alarm shall actuate when the peak response from each hole is detected.

If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition E.'[e October 5, 1982 23 70

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March 16, 1983

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[

167M/46M830318-24 NUMBER & REV.

ISI-154 Rev. 1 rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.

6.5.10.5 Increase the receiver gain by 14dB and record all pertinent calibration data on the calibration data sheets.

6.5.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.

Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.

6.6 Calibration for Examination of Nozzle Radii and Protrusions System calibration for each angle beam inspection channel / transducer combination used for nozzle radius and protrusion examination shall be performed as described below.

6.6.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank.

6.6.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.

6.6.3 Position the transducer to obtain a maximum response from the side drilled hole at the longest test metal distance E$E October 5, 1982 24 70

@,sE March 16, 1983

,,,g g,

NUMBER & REV.

N167M/46M830318-25 15I-154 Rev. I and adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradict:le on the CRT.

6.6.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen.

Record the transit time to the entry surface reflection.

6.6.3.2 Since the gate position. controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.

6.6.3.3 Determine the sound velocity and measure the water temperature.

Record these values.

y _ Round Trip Distance j

Travel Time 6.6.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

6.6.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and l

the response from the reference hole at the longest test metal distance occupies 60% to 90%

of the full sweep length.

i t

(

l l

1 j

EEs" October 5, 1982 25 70 S'Es*

March 16, 1983

,4cE or 1

I IIII0 memev.

167M/46M830318-26 ISI-154 Rev. 1 6.6.4.2 Record the transit time between the entry surface reflection and the side drilled hole response.

6.6.4.3 Calculate the sound velocity in the calibration block and record this value.

6.6.4.4 Adjust the selected gate controls to include all metal travel between the entry surface reflec-tion and the response from the side drilled hole at the longest test metal distance.

6.6.5 Set the trace and gate baselines to zero percent of scale.

6.6.6 Position the transducer to obtain the maximum respor.se from the drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 80% + IdB of full screen height. Mark the peak of the indication on the screen.

Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.

6.6.7 Without changing instrument settings move the transducer to obtain the maximum responses from the other calibration hole. Mark the peak of this indication on the screen.

Record the indication amplitude and transit time from the water / steel interface to the indication.

i l

6.6.8 Draw a line through the maximum response points on the CRT screen.

The curve may be extended at either end for a distance equivalent to one quarter the depth of the deepest hole. This line represents the basic calibration distance amplitude curve (OAC).

l

$'[r's*"*'

October 5, 1982 26 70 lE March 16, 1983 SEo

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%Ar usig NUMBER 8 REV.

N167M/46M830318-27 151-154 Rev. 1 6.6.9 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

6.6.10 The electronic DAC module function shall then be initiated.

6.6.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally 80% FSH.

6.6.10.2 Adjust the gate threshold (alarn level) to 16%

FSH and set for positive trigger.

6.6.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector.

The amplitude of each should be 80%

FSH + 2dB.

If not, review steps 6.6.1 through 6.6.10.3.

6.6.10.4 Decrease the receiver gain by 14dB.

Switch the system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.

The gate alarm shall actuate when the peak re'ponse from each hole is detected.

If the s

alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which.may require adjustment and make corrections, if necessary.

6.6.10.5 Increase the receiver gain by 14dB and record all pertinent calibration data on the calibration data sheets.

6.6.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which

' E ""'

October 5, 1982 27 o

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NUMBER A REV.

N167M/46M830318-28 ISI-154 Rev. 1 fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.

Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.

6.7 Calibration for Angle Beam Examination of Nozzle-to-Safe End Welds System calibration for each angle beam inspection channel / transducer 4

combination used for safe end inspection shall be performed as described below. When the calibration block is a mockup of the bimetallic weld, calibration shall be from the side of the weld, carbon steel or stainless steel, corresponding to the side of the weld from which the examination will be performed.

6.7.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly to the manipulator in the calibration tank.

6.7.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.

6.7.3 Position the transducer to obtain a maximum response from the side drilled hole at the longest test metal distance l

and adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on l

the CRT.

l l

6.7.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse 7((e October 5, 1982 3,c, M

70

"$[E March 16, 1983 8'

o, o

W 18810 NUMBER & REV.

N167M/46M830318-29 ISI-154 Rev. 1 and entry surface reflection are displayed on the CRT screen.

Record the transit time to the entry surface reflection.

6.7.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.

6.7.3.3 Determine the sound velocity and measure the water temperature.

Record these values.

y _ Round Trip Distance Travel Time 6.7.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

l 6.7.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the response from the side drilled hole at the

(

longest test distance occupies 50% to 70% of the full sweep length.

l 6.7.4.2 Record the transit time between the entry l

surface reflection and the response from the drilled hole at the longest test distance.

I 6.7.4.3 Calculate the sound velocity in the calibration block and record this value.

l

'o47s

October 5, 1982 29 70 o Es" March 16, 1983 yo, c,

NUMBER 8 REV.

167M/46M830318-30 ISI-154 Rev. 1 6.7.4.4 Adjust the selected gate controls to include all metal travel from the entry surface reflection to the equivalent of 1/4T past the 3/4T hole as a minimum.

6.7.5 Set the trace and gate baselines to zero percent of scale.

6.7.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 40% + ldB of full screen height. Mark the peak of the indication on the screen.

Record instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.

6.7.7 Without changing instrument settings move the transducer to obtain the maximum responses from the other calibration holes. Mark the peaks of these indications on the screen.

Record the indication amplitudes and transit time from the water / steel interface to the indications.

6.7.8 Draw a line through the maximum response points on the CRT screen. The curve may be extrapolated at either end for a distance of one quarter the thickness of the calibration block.

This line represents the basic calibration distance amplitude curve (PAC).

6.7.9 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

$'r$ "' October 5, 1982 30 70 lE March 16, 1983

[

SEo g,c, g,

NUMBER & REV.

167M/46M830318-31 15I-154 Rev. 1 6.7.10 The electronic DAC module function shall then be initiated.

6.7.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally 40% FSH.

6.7.10.2 Adjust the gate threshold (alarm level) value to 16% FSH and set for positive trigger.

6.7.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector.

The amplitude of each should be 40%

FSH + 2dB.

If not, review steps 6.7.1 through 6.7.10.3.

6.7.10.4 Decrease the receiver gain by 6dB.

Switch the system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.

The gate alarm shall actuate when the peak l

response from each hole is detected.

If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make c~rrections, if necessary.

o i

l 6.7.10.5 Increase the receiver gain by 6dB and record all pertinent calibration data on the calibration data sheets.

6.7.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.

'2d "** October 5, 1982 31 70

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March 16, 1983 o

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167M/46M830318-32 ISI-154 Rev. 1 Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.

6.8 Calibration for Examination of Reactor Vessel Flange Ligaments System calibration for each straight beam inspection channel /

transducer combination used for flange ligament inspection shall be performed as described below.

6.8.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly to the manipulator in the calibration tank.

6.8.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.

6.8.3 Adjust the instrument delay such that the lower left corner of the initial pulse starts a't the 0 gradicule on the CRT.

6.8.3.1 Adjust the instrument range control to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen.

Record the transit time to the entry surface reflection.

6.8.3.2 Since the gate position controls of the ultrasonic system are cc.librated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel s

time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.

[$ "** October 5, 1982 32 70

"'[,*"

March 16, 1983 o

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o4

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au NUMBER & REV.

N167M/46M830318-33 ISI-154 Rev. 1 6.8.?.3 Determine the sound velocity and measure the water temperature.

Record these values.

y _ Round Trip Distance Travel Time 6.8.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

6.8.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the reflection from the applicable reference hole at the longest test metal distance occupies 60% to 90% of the full sweep length.

6.8.4.2 Record the transit time between the entry surface reflection and the' reflection from the reference hole.

6.8.4.3 Calculate the sound velocity in the calibration block and record this value.

6.8.4.4 Adjust the selected gate controls to include all metal travel between the water / steel interface and the far limit of the inspection volume as defined in the Examination Program Plan.

6.8.5 Set the trace and gate baselines to zero gercent of scale.

6.8.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest amplitude. Adjust the preamplifier gain control to set the indication amplitude to 40% (+ ldB) of full screen height.

Mark the peak of the indication on the screen.

se 33 70

"'[e March 16, 1983 Er's"*"

October 5, 1982 3,c, o,

NUMBER & REY.

~

N167M/46M830318-34 ISI-154 Rev. 1 Record instrument settings, indication amplitude, and transit time from the entry surface reflection to the indication.

6.8.7 Without changing instrument settings move the transducer to obtain the maximum responses from the remaining calibration. holes.

Mark the peak of the indications on the screen.

Record the indication amplitudes and transit times from the water / steel interface to the indications.

6.8.8 Draw a line through the maximum response points on the CRT screen. The curve may be extrapolated at either end for a distance of one quarter the thickness of the calibration block.

This line represents the basic calibration distance amplitude curve (DAC).

6.8.9 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

6.8.10 The electronic DAC module function shall then be initiated.

6.8.10.1 Adjust the electronic DAC controls so all EBS pulses are nominally 40% FSH.

6.8.10.2 Adjust the gate threshold (alarm level) value to 16% FSH and set for positive trigger.

6.8.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector. The amplitude of each should be at 40% FSH + 2dB.

If not, review steps 6.8.1 through 6.8.10.3.

6.8.10.4 Dicrease the receiver gain by 6dB.

Switch the system to the cycle mode and scan the transducer

((r'"'**

October 5,'1982

,,cc 34 70 oIEc' March 16, 1983 or

IE uuusen a nev.

N167M/46M830318-35 ISI-154 Rev. 1 assembly over the calibration block at or greater than the specified examination speed.

The gate alarm shall actuate when the peak response from each hole is detected.

If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.

6.8.10.5 Increase the receiver gain by 6dB and record all pertinent calibration data on the calibration data sheets.

6.8.11 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.

l l

l Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.

i 6.9 Calibration for Full Node Angle Beam Examination of Vertical and Circumferential Vessel Welds l

System calibration for each inspection channel / transducer combination used for full node angle beam examination of the volume l

of material near the vessel inside diameter shall be performed as 1

described below.

l

(('***

October 5, 1982 o,

35 70

"'[s*'

March 16, 1983

NUMBE.18 REV.

167M/46M830318-36 ISI-154 Rev. 1 6.9.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the

~

manipulator in the calibration tank.

6.9.2 Position the transducer to direct the sound toward the appropriate surface of the calibration block at the required waterpath.

Record the transit time from the initial pulse to the entry surface reflection.

6.9.3 Position the transducer to obtain a maximum full node response from the square notch on the entry surface of the block.

6.9.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

6.9.4.1 Adjust the instrument range such that metal travel between the entry surface refl'ection and the notch response occupies 50% to 80% of the full sweep length.

6.9.4.2 Record the transit time between the entry i

l surface reflection and the notch response.

6.9.4.3 Adjust the selected gate controls to include all metal travel between the 7/8 node and 1 1/8 node responses from the 1/4T hole.

6.9.5 Set the trace and gate baselines to zero percent of scale.

6.9.6 Adjust the preamplifier gain control to set the notch full node response indication to 40% + ldB of full screen height. Mark the peak of the indication on the screen.

o[r October 5, 1982 36 70 o E'se March 16, 1983

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e m

w

NUMBER & REV.

N167M/46M830318-37 ISI-154 Rev. 1 Rec'ord instrument settings, indication amplitude, and transit time from the entry surface reflection to the indication.

6.9.7 Draw a horizontal line through the maximum response point on the CRT and extend it to include the entire gate length.

This line represents the basic calibration distance amplitude curve (DAC).

6.9.8 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

6.9.9 Adjust the gate threshold (alarm level) to 16% FSH and set for positive trigger.

6.9.9.1 Disable the EBS, scan the block, and observe the response from the notch. The amplitude should be at 40% FSH (+ 2dB).

If not, review steps 6.9.1 through 6.9.9.1.

6.9.9.2 Decrease the receiver gain by 6dB.

Switch the system to the cycle mode and scan the transducer over the calibration block at or greater than the examination speed.

The gate alarm should actuate when the peak response from the notch is detected.

If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.

6.9.9.3 Increase the receiver gain by 6dB and record all pertinent calibration data on the calibratton data sheets.

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167M/46M830318-38 ISI-154 Rey, 1

-l 6.9.10 Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.

Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.

6.10 Salibration for Near Surface Examinations System calibration for each inspection channel / transducer combination used for near surface examination of volumes of material near the vessel inside diameter shall be performed as described below.

6.10.1 Transducers used for these examinations shall be dual -

element, transmit-receive, 2.25 MHz units of th'e type Ultran WKSI-2.25 WRV, WPSI-2.25 WRV, or equivalent.

The nominal waterpath shall be 6.0 inches and the nominal incident angle shall be 12.5' unless otherwise specified.

l 6.10.2 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank.

6.10.3 Position the transducer to direct the sound beam toward

~

the appropriate surface of the calibration block at the required waterpath.

Record the transit time from the initial pulse to the entry surface reflection.

NOTE It may be necessary to increase the gain and/or use one search unit element in the pulse-echo mode to obtain a discernable entry surface reflection.

~

[$'s ""' October 5, 1982

~,,os 38 or 70

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N1 7 /46M830318-39 "YEI-1E[Rev.1

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6.10.4 Position the transducer to obtain a maximum response from the 1/8-inch diameter side drilled hole located 3/4-inch in depth from the entry surface.

6.10.5 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.

6.10.5.1 Adjust the instrument range such that metal travel between the entry surface reflection and the response from the 1/8" diameter side drilled hole at 3/4-inch depth occupies 50% to 75% of the full sweep range.

6.10.5.2 Record the transit time between the entry surface reflection and the hole response.

6.10.5.3 Adjust the selected gate controls to include as a minimum all metal travel from the l' wer left.

o corner of the entry surface reflection to at least 10 microseconds past the response from the 1/8-inch diameter hole at 3/4-inch depth.

6.10.6 Set the trace and gate baselines to zero percent of scale.

6.10.7 Adjust the preamplifier gain control to set the indication from the 1/8-inch diameter hole at 3/4-inch depth to 80%

+ IdB of full screen height. Mark the peak of the indication on the screen.

6.10.8 Without changing instrument settings move the transducer to obtain maximum responses from the two remaining calibration holes and the square notch on the entry surface of the block.

$'[r's October 5, 1982 39 70

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6.10.9 Record instrument settings, indication amplitudes (i.e.,

100% FSH + 6dB), and transit times from the water / steel interface (see Note Paragraph 6.10.5) to the indications.

6.10.10 Draw a horizontal line through the response from the 3/4 inch deep hole on the CRT screen.

The curve shall be extrapolated at either end to cover the entire gate length as set in Paragraph 6.10.5.3.

6.10.11 Adjust the EBS pulse train to follow the DAC.

Record the EBS control settings.

6.10.12 Adjust the gate threshold (alarm level) to 40% FSH and set for positive trigger.

6.10.12.1 Disable the EBS, scan the block, and observe the response from the 1/8 inch diameter side drilled hole at 3/4 inch depth.

The amplitude should be at 80% FSH (+ 2dB).

If not, review steps 6.10.2 through 6.10.12.1.

6.10.12.2 Decrease the receiver gain by 6dB.

Switch the system to the cycle mode and scan the transducer over the calibration block at or greater than the examination speed. The gate alarm shall actuate when the peak response from the 3/4 inch deep 1/8 inch diameter side drilled hole is detected.

If the alarm is not observed, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, etc.) which may require adjustment and make corrections, if necessary.

6.10.12.3 Increase the receiver gain by 6 dB and record all pertinent calibration data on the calibration data sheets.

E[r'ef**' October 5, 1982 40 70 oI[e March 16, 1983 ss

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NUMSER & REV.

N167M/46M830318-41 ISI-154 Rev. 1 6.10.13 Position the transducer to obtain the peal responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.

Reflectors selected for this step shall provide transit tim'es representative of those for the primary reflectors in the basic calibration block where practical.

1 6.11 eeam Spread Measurements 1

Beam spread measurements shall be made for each transducer used during the inspection program. Data will be recorded on the appro-

}

priate caiibration data sheet.

6.11.1 Establish the location of the scribe line on the reference block as a zero reference point.

6.11.2 Position the transducer to obtain the maximum indication amplitude from the applicable calibration hole at the nearest test distance in the appropriate basic calibration block.

Record the manipulator carriage location with respect to the zero reference point and the transit time to the indication.

6.11.3 Move +% transducer toward the reference hole until the indication amp 1ftude drops to 50% of its peak amplitude.

Record the manipulator carriage location with respect to the zero reference point and the transit time to the indication. Move the transducer toward the reference hole until the indication amplitude drops to 20% of its peak amplitude and record data defined above.

j l

2 El acme October 5, 1982

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167M/46M830318-42 ISI-154 Rev. 1 6.11.4 Move the transducer away from the reference hole until the indication amplitude passes through maximum and again drops to 50% of its peak amplitude.

Record the manipulator carriage location with respect to the zero reference point and the transit time to the indication.

Move the transducer away from the reference hole until the indication amplitude drops to 20% of its peak amplitude and record data defined above.

6.11.5 Repeat these measurements on the other applicable calibration holes.

6.12 Field System Calibration On site the system calibration shall be established and verified with the EBS per Paragraph 6.12.1 at the beginning and end of each scan routine, with any change of equipment, or every four hours, whichever is less.

Calibration shall be established and verified' on the MTS cylindrical reflector array per paragraph 6.12.2 at the beginning and end of each series of examinations with a particular transducer array plate.

6.12.1 Enable the EBS and observe the pulse train.

l 6.12.1.1 If any point on the DAC curve has decreased by 20% or 2dB of its original amplitude, calibra-tion shall be re-established and all areas since the previous acceptable calibration or check reexamined.

6.12.1.2 If any point on the DAC curve has increased by 20% or 2dB of its original smplitude, calibra-l tion shall be re-established and all reportable indications since the previous acceptable calibration or check reevaluated.

E47e ""' October 5, 1982 g,c, 42 70 SS?s March 16, 1983 se o,

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NUMBER & REY.

N167M/46M830318-43 ISI-154 Rev. 1 6.12.2 Disable the EBS function and position the transducer array such that it is directed toward the cylindrical reflector array mounted on the tool 0* 1eg.

Each applicable transducer / inspection channel should be checked as follows:

6.12.2.1 Position the transducer to obtain the peak responses from each cylindrical reflector in the MTS array used during initial system calibration at the specified waterpaths.

Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse in microseconds.

6.12.2.2 The recorded values should be compared to the data obtained during the initial calibration at Waltz Mill.

6.12.2.2.1 If the response from any reflector has decreased by 20% or 2dB of its original amplitude, calibration shall be re-established and all areas since the previous acceptable calibra-tion or check reexamined.

6.12.2.2.2 If the response from any reflector has increased by 20% or 2dB of its original amplitude, calibration shall be re-established and all reportable indications since the previous acceptable calibration or check reevaluated.

5'E October 5,1982 -

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.43 70 March 16, 1983 R

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NUMBER & REV.

N167M/46M830318-44 ISI-154 Rev. 1 1

6.12.2.2.3 If the response from any reflector in the gated sweep length has moved on the sweep line more than 10% of the sweep reading, correct the sweep range calibration and note the correction in the examination record.

If recordable reflectors are noted on the data sheets, those data sheets shall be voided, the new calibration shall be recorded, and areas relative to the voided data re-examined.

6.12.3 Verification of the performance of calibration checks shall be documented.

Documentation shall include the date, time, and initials of the operator.

6.13 Transducer RF Waveforms When photographic records of transducer RF waveforms are required, they shall be collected as follows.

These records may be made at the calibration facility or at the reactor site.

6.13.1 Position the transducer to obtain the peak response from one of the cylindrical reflectors in the MTS array.

i j

6.13.2 Display the RF waveform on a calibrated oscilloscope.

i 6.13.3 Adjust the oscilloscope sweep controls to clearly display the waveform.

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N167M/46M830318-45 ISI-154 Rev. 1 6.13.4 Adjust the oscilloscope veritical display so the amplitude of the response is two to four centimeters.

6.13.5 Photograph the displayed waveform and record all pertinent data on the Transducer RF Waveform Data Sheet.

6.13.6 Photographic records of transducer RF waveforms collected after reactor vessel examinations should be made using the same reflector, electronics, waterpath and instrument settings as used prior to the examinations when practical.

7.0 EXAMINATION REQUIREMENTS 7.1 The following activities shall have been completed prior to the performance of any in-field ultrasonic examination of a reactor vessel using the remotely operated inspection tool.

7.1.1 The reactor vessel Examination Program Plan identifying.

specific plant inspection parameters such as search unit incident angles, calibration standards, water paths, scan lengths, scan locations, and scan increments shall have been prepared in accordance with WNSID Procedure RV-ISI-01.

7.1.2 The ultrasonic equipment shall have been calibrated for all examinations required by the Examination Program Plan and all data recorded in accordance with paragraph 6.0 of j

this procedure.

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l 7.1.3 The reactor vessel inspection tool shall have been assembled in the configuration on the arrangement drawing applicable to the specific vessel being examined as listed in the Examination Program Plan.

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N167M/46M830318-46 151-154 Rev. 1 7.1.4 Prior to placing the inspection tool on the reactor vessel, the following tests and checks shall be performed to demonstrate the tool is fully operational and to assure the tool can be safely set on the reactor vessel.

7.1.4.1 Establish "home" position and record all resolver readings and other relevant data.

Mechanically measure the distance from the face of transducer zero (TRO) to the sperical target and record this value.

7.1.4.2 Test to ensure that all drives are functional

'both in manual and computer control.

7.1.4.3 Visually verify that all appropriate hardware is properly secured by lockwire or other suitable means.

7.1.4.4 Check each transducer and associated pulser / amplifier channel by tapping on the face of the transducer and observing the initial pulse.

7.1.4.5 Cavity water clarity shall be adequate to assure visibility of the vessel flange, keyways, and core barrel seating surface.

7.1.4.6 Verify that no specimen capsules are installed where the inspection tool legs will seat.

7.1.5 The calibration settings of each transducer /instrumenta-tion system shall be checked using the data previously entered in the Electronic Block Simultor (EBS) with the Sonic system control settings as defined on the Calibra-tion Data Sheets for each examination to be performed.

EEE October 5, 1982 46 E SEo p,c, o, 70 o

March 16, 1983

4 NUMBER & REV.

N167M/46M830318-47 ISI-154 Rev. 1 7.1.6 Once the inspection tool is set on the reactor vessel the tool home position shall be verified by monitoring the TRO straight beam inspection channel and positioning the search unit to obtain a peaked response from the spherical target without changing waterpath from that set mechanically in 7.1.4.1.

Contact the control room, obtain the refueling water temperature, and record this value.

If the temperature.is not within + 25*F of that used during calibration, advise the control room to notify when temperature is within this range. Water temperature may be measured directly with a thermometer.

7.1.7 Calculate the water velocity, record this value, End compare with that determined during system calibration.

7.1.8 Check the instrument calibration and system calibration.

7.2 Prior to initiating a scan per the Examination Program Plan, the flange area shall be subject to preliminary scans while monitoring the TRO inspection channel to determine that the tool is properly centered, level, and that water paths (compensated for difference in water velocity, if necessary) correspond with those used during calibration.

7.3 The area to be examined shall be subject to a preliminary scan while l

monitoring the TRO inspection channel to determine the thickness of the examination area, if possible.

Use this information to verify that all gates have been set properly.

If gating adjustments are l

necessary at any time during the examination they shall be documented.

7.4 Each area of the reactor vessel identified in the Examination Program Plan shall be scanned in accordance with the requirements of l

the Examination Program Plan.

47-70

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167M/46M830318-48 ISI-154 Rev. 1 7.4.1 The computer "home" routine shall be used to determine the e

actual reference position for the nine axes of tool move-ment at least once each day. When a computer "home" is achieved, a peaked response from the spherical target should be observed on the TRO inspection channel and the axes resolver readings shall be recorded and compared with those original values recorded per paragraph 7.1.4.1.

7.5 During scanning the following parameters shall be maintained unless otherwise specified in the Examination Program Plan.

7.5.1 Scanning shall be conducted at the calibration sensitivity.

7.5.2 The rate of search unit movement shall be 5 inches per second maximum.

7.5.3 Scan increments shall be three quarter inches maximum for 1-1/2 inch diameter transducers and three-eighth inches maximum for 3/4 inch diameter transducers.

7.6 The following paragraphs provide general scanning requirements for each area of the reactor vessel.

Specific requirements are provided in the Examination Program Plan.

I 7.6.1 Base Metal Examination When specified in the Examination Program Plan, the base l

metal through which angle beams will pass shall be l

completely scanned by straight beam to detect laminar reflectors where practical.

l i

7.6.1.1 Sensitivity shall be established at a location free of indications by adjusting the first back surface reflection to 80% FSH.

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N167M/46M830318-49 ISI-154 Rev. 1 7.6.1.2 Set the back wall gate to monitor the back surface reflection and alarm when the echo amplitude drops to 16% FSH.

7.6.1.3 Areas in the base metal containing laminar indications that cause either or both of the following shall be recorded, a)

All areas where indications are equal to or exceed the amplitude of the remaining back

~

reflection.

b)

All areas that produce a continuous total loss of back reflection accompanied by a continuous indication in a singular plane.

7.6.1.4 Areas identified per paragraph 7.6.1.3 shall be recorded on the data printout in terms of the transit time to the indication, peak ' indication amplitude, remaining backwall amplitude, location,.and extent.

7.6.1.5 Areas identified per paragraph 7.6.1.3 a) shall be investigated to determine if and to what extent they interfere with angle beam examina-tions. Where the reflectors do interfere, the angle beam technique (s) shall'be reviewed toward achieving at least the minimum required coverage of the volume required to be examined, and modified to the extent necessary and practical to accomplish this.

7.6.1.6 Areas identified per paragraph 7.6.1.3 b) shall be investigated in terms of the appropriate acceptance criteria for laminar reflectors.

oEs "" October 5, 1982 o, 70 S'Ee

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V 7.6.1.7 Alternately, the base metal examination may be conducted as an extension of straight beam examination in accordance with paragraph 7.6,.2.1 provided the sensitivity is at least that required in paragraph 7.6.1.1 and the gating and alarm requirements of paragraph 7.6.1.2 are employed.

7.6.2 Vertical and Circumferential Vessel Welds The extent of each reactor vessel vertical and/or circumferential weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.

7.6.2.1 The entire weld, both heat affected zones, and 4

o specified adjacent base material are examined U

from the vessel ID by longitudinal waves at 0.

7.6.2.2 The entire weld, both heat affected zones, and specified adjacent base material are examined from the vessel ID by transverse waves at two angles, the difference between which shall be at least 10, in two directions parallel to the weld and two directions perpendicular to the weld.

For purposes of minimum required coverage, adjacent base material need not be examined with both angle beams in both directions. Any combination of two angle beams will satisfy this requirement.

7.6.3 Reactor Vessel Flange-to-Upper Shell Weld The extent of the reactor vessel flange-to-upper shell weld identified in the Examination Program Plan shall be st 50 70

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October 5, 1982

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N167M/46M830318-51 I51-154 Rev. 1 examined in accordance with the following requirements where practical.

o 7.6.3.1 The reactor vessel flange-to-upper shell weld, both heat affected zones, and specified adjacent base material are examined from the vessel flange seal surface using longitudinal waves at angles as defined in the Examination Program Plan.

7.6.3.2 When the core barrel is removed the flange-to-upper shell weld may be examined from the vessel ID in accordance with Paragraph 7.6.2, except angle beam scanning perpendicular to the weld will be performed from the vessel shell side only.

7.6.4 Reactor Vessel Nozzle-to-Shell Welds The extent of each reactor vessel nozzle-to-shell weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.

7.6.4.1 The reactor vessel nozzle-to-shell weld, both heat affected zones, and specified adjacent base material are examined from the nozzle bore using longitudinal waves at angles as defined in the Examination Program Plan.

NOTE RHR flow should be off or reduced to the extent possible during this examination. Water clarity shall be such that the nozzle opening is clearly visible from the operating deck.

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' October 5, 1982 51 o, 70 o4EE March 16, 1983

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N167M/46M830318-52 ISI-154 Rev. 1 j

7.6.5 Nozzle Radius and Protrusion The extent of each nozzle radius or protrusion identified

)

in the Examination Program Plan shall be examined in I

accordance with the following requirements where practical.

7.6.5.1 The entire area defined by the Examination Program Plan is examined from the nozzle ID by transverse waves in both circumferential directions.

NOTE RHR flow should be off or reduced to the extent possible during this examination. Water clarity shall be such that'the nozzle opening is clearly visible from the operating deck.

7.6.6 Nozzle-to-Safe Ends Welds The extent of each reactor vessel nozzle-to-safe end weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.

7.6.6.1 The entire weld, both heat affected zones, and specified adjacent base material are examined from'the nozzle bore by longitudinal waves at 0*.

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1 7.6.6.2 The entire weld, both heat affected zones, and specified adjacent base material are examined from the nozzle bore by angled longitudinal waves in two directions parallel to the weld and two directions perpendicular to the weld.

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N167M/46M830318-53 ISI-154 Rey, 1 NOTE RHR flow should be off or reduced to the extent possible during this examination. Water clarity shall be such that the nozzle opening is clearly visible from the operating deck.

7.6.7 Reactor Vessel Flange Ligaments The extent of the threaded ligaments in the reactor vessel flange identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.

7.6.7.1 The ligaments between threaded stud holes are examined from the top of the flange using longitudinal waves at 0*.

7.6.8 Full Node Angle Beam Examination of Vertical and Circumferential Vessel Welds When full node angle beam examinations are specified, the extent of each reactor vessel vertical and/or circumfer-ential weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.

i 7.6.8.1 The volume of material including the weld, both heat affected zones, and specified adjacent base material within 1/8T of the vessel ID shall be examined in two directions parallel to the weld and two directions transverse to the weld.

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N167M/46M830318-54 151-154 Rev. 1 C

7.6.9 Near Surface Examinations of Vertical and Circumferential Vessel Welds When near surface examinations are specified, the extent of each reactor vessel vertical and circumferential weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.

7.6.9.1 The volume of material including the weld, both heat affected zones, and specified adjacent base material within one inch of the vessel ID shall be examined in two directions parallel to the weld ano two directions transverse to the weld.

8.0 INTERPRETATION AND INVESTIGATION 8.1 The Level II or Level III examiner shall interpret indications iri accordance with criteria listed below such that he can assess their being valid or not valid.

8.1.1 The interpretation and investigation level is 50% of the primary reference OAC for:

8.1.1.1 All indications detected during straight beam l

examinations of vertical and circumferential welds.

I 8.1.1.2 Indications detected during angle beam examinations of vertical and circumferential welds at transit times representing 25 percent and greater of the vessel through-wall thickness measured from the inner surface.

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o N167M/46M830318-55 ISI-154 Rev. 1 8.1.1.3 Indications detected during examinations of the flange-to-upper shell weld from the seal surface at locations representing 25 percent and greater of the vessel through-wall thickness measured from the inner surface.

8.1.1.4 Indications detected during examinations of nozzle-to-shell welds from nozzle bores at locations representing 25 percent and greater of the vessel through-wall thickness measured from the inner surface.

8.1.1.5 All indications detected during straight and angle beam examinations of nozzle-to-safe end welds.

8.1.1.6 All indications detected during examinations of reactor vessel flange ligaments.

8.1.1.7 All indications detected during full node angle beam examinations of vertical and circumferen-tial welds.

8.1.1.8 All indications detected during near surface examinations.

l l

8.1.2 The interpretation and investigation level is 20% of the j

primary reference DAC for:

l 8.1.2.1 Indications detected during angle beam examinations of vertical and circumferential welds at transit times which represent the inner 25 percent of the vessel through-wall thickness measured from the inner surface.

I 1

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167M/46M830318-56 ISI-154 Rev. 1 8.1.2.2 Indications detected during examinations of the flange-to-upper shell weld from'the seal surface at locations which are within*25 percent of the vessel through-wall thickness measured from the inner surface.

8.1.2.3 Indications detected during examinations of nozzle-to-shell welds from nozzle bores at locations which are within 25 percent of the vessel through-wall thickness measured from the inner surface.

8.1.2.4 All indications detected during examinations of nozzle radii and protrusions.

8.2 Valid indications are the result of flaw reflectors such as cracks, lack of penetration, lack of fusion, inclusions, slag and porosity.

All other indications are considered not valid, including those due to:

scanning noise, grain structure, beam redirection, loss of interface gating, spurious noise from electrical sources, clad interface, straight beam back surface, mode conversion and geometric reflectors.

8.3 Valid indications meeting the criteria of paragraphs 8.1 and 8.2 shall be investigated by the examiner in terms of the recording requirements in paragraph 9.0.

8.4 Other transducers, search units, frequencies, techniques, etc., may be used to aid interpretation and investigation.

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N167M/46M830318-57 ISI-154 Rev. 1 9.0 RECORDING REQUIREMENTS 9.1 All indications shall be identified as valid or non-valid on the data printout.

Valid indications having amplitudes which equal or exceed the appropriate interpretation and investigation level within the OD and ID boundaries of the area being examined shall be recorded per the additional requirements of Paragraph 9.4.

Valid indications having amplitudes less than the appropriate interpretation and investigation level need only have peak amplitudes noted on the data printout.

9.2 The " Flaw Detect" data acquisition system provides the following information.

9.2.1 A digital readout defining the location of each of the nine axis of tool motion.

9.2.2 Identity of the inspection channel.

9.2.3 The number of indications exceeding the primary reference level.

9.2.4 A digital readout in microseconds of the transit time to the indication (s) referenced from the channel 0 interface position.

9.2.5 The indication amplitude (s) in percent of FSH.

9.3 For examinations of nozzle-to-shell welds from the nozzle bore, "A" scan data will be permanently recorded on videotape for review and interpretation in lieu of use of the " Flaw Detect" data acquisition system.

The "A" scan recording system is diagrammed in Figure 9.

Operation of the system is described as follows:

E

'IE ""' October 5, 1982 57-70 March 16, 1983 oA E

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N167M/46M830318-58 151-154 Rev. 1 9.3.1 Adjust the Sonic Mark VI delay and range controls such that the artificial interface marker, set at the sweep position defined during system calibration, falls on the first major screen division (10% of sweep length) and the end of the gate set, as a minimum, at the length defined during system calibration, falls on the ninth major screen division (90% of sweep length).

9.3.2 Calculate the Sonic Mark VI horizontal sweep calibration in usec/div at those sweep settings.

9.3.3 Establish an EBS pulse train to start and end at the sweep location described for the artificial interface and end at the sweep location described for the end of the gate.

9.3.4 Calibrate the sweep of the auxiliary 'A" scan oscilloscope as follows. Adjust the sweep delay and range controls of the auxiliary "A" scan oscilloscope until the EBS signals described in 9.3.3 are at identical sweep locations as on the Sonic Mark VI. After this adjustment is made, tape down the horizontal fine adjustment knob. The horizontal sweep calibration (usec/div) of the auxiliary "A" scan oscilloscope is then the same as that determined for the Sonic Mark VI in paragraph 9.3.2.

9.3.5

' Calibrate the vertical scale of the auxiliary "A" scan oscilloscope as follows. Adjust the EBS attenuation controls to obtain a 100% full screen height response for one EBS pulse on the Sonic Mark VI.

View this same EBS pulse on the auxiliary "A" scan oscilloscope and adjust the vertical scale such that the amplitude is also 100% of full screen height. After this adjustment is made, tape down the vertical fine adjustment knob.

5's "" October 5, 1982

,os 58 70

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March 16, 1983 8

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T 17 46M830318-59 YSI-15YRev.1 9.3.6 Check the vertical linearity of the "A" scan oscilloscope per paragraph 5.2.

9.3.7 Field calibration checks with the EBS shall be recorded at

.the beginning and end of each nozzle examination.

9.3.8 The following information, as a minimum, shall be prominently displayed on the recording.

9.3.8.1 Plant iden'tification.

9.3.8.2 Nozzle identification.

9.3.8.3 Transducer / channel identification.

9.3.8.4 Artificial interface transit time and sweep position on the auxiliary display, c

9.3.8.5 Gate delay and length.

Specify the g' ate end sweep position on the auxiliary display.

9.3.8.6 Sweep calibration in usec/div.

9.3.9 "A" scan, tool position, and timing information shall be permanently recorded for scans of nozzle-to-shell welds from the nozzle bores performed per paragraph 7.6.4.

9.4 On completion of scanning activity the following additional information shall be generated and recorded on a weld scan data j

sheet, Figure 7, for each recordable indication using the inspection tool under manual (jog) control. This sequence is illustrated in Figure 8.

9.4.1 Maximum indication amplitude in percent of the DAC calibration curve, search unit location as defined by the

((r's"* October 5, 1982 59 70 lEs '

March 16, 1983 S

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NUMBE4 & AEV.

167M/46M830318-60 ISI-154 Rev. I nine axis of tool motion, and transit time from the water /

steel interface to the indication.

9.4.2 Jog the search unit toward the reflector. Where a 20% DAC interpretation and investigation level is specified, record the search unit location as defined by the nine axes of tool motion and transit time from the water / steel interface to the indication for positions where the indication amplitude drops to 100%, 50%, and 20% of the DAC curve. Where a 50% DAC interpretation and investiga-tion level is spgcified, this information shall be recorded for the 100% and 50% DAC positions only.

9.4.3 Jog the search unit away from the reflector. Where a 20%

DAC interpretation and investigation level is specified, record the search unit location as defined by the nine axes of tool motion and tra'nsit time from the water / steel interface to the indication for positions where the indication amplitude drops to 100%, 50%, and 20% of the DAC curve. Where a 50% DAC interpretation and investiga-tion level is specified, this information shall be recorded for the 100% and 50% DAC positions only.

9.4.4 Jog the search unit back to the area of maximum amplitude and peak the indication. Where a 20% DAC interpretation and investigation level is specified, the length of the reflector shall be determined by scanning along the reflector's major dimension and recording search unit locations as defined by the nine axes of tool motion where the indication amplitude drops to 100%, 50%, and 20% of the DAC curve. Where a 50% DAC interpretation and investigation level is specified, this information shall be recorded for the 100% and 50% DAC positions only.

9.5 Disassembly of the inspection tool shall not commence until all recordable indications have been evaluated by WNSID.

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167M/46M830318-61 151-154 Rev. 1 10.0 EXAMINATION RECORDS The following information shall be provided to document the examinations.

10.1 The test procedure 10.2 Description of the test system 10.3 Calibration records 10.4 1dentification and location of extent of areas examined 10.5 Record of all indications recorded 10.6 Record of all evaluations of' indications 10.7 Personnel certifications 10.8 Dates and times of examinations 10.9 Calibration block identification 10.10 Couplant 10.11 Surface condition o2 ""' October 5, 1982 61 o, 70

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.ISI 154 Rev.1 WESTINGHOUSE NUCLEAR SERVICE INTEGRATION DIV!510N TRANSDUCER RF WAVEFORM DATA 5HEET UTILITY PLANT Orae->a$rEcTica OPOSTia$rECTrcu TRANSDUCER INFORMATION Manufacturer Frequency mz Actize Element Dimension Connector Type UHF Focal Type Serial Number TEST DATA Target Waterpath Refracted Angle _

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EFFECTIVE October 5, 1982 67 of 70 REVISED March 16, 1983 OATE PAGE DATE l

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E'[7,CSE October 5,1982

^ p og 69 of 70 l$$ED March 16,1983 E

NSD ISI 154 Rev. 1 m

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FIGURE 9 - TYPICAL.."A",S. COPE VIDE 0 RECORDING S,YSTEM i

October S, 1982 fE EFFECTIVE l

D PAGE l

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