ML12143A136

NDE Results for Steam Generator Hot Leg Nozzle Full Structural Weld Overlays. Part 2 of 2

ML12143A136
Person / Time
Site:	North Anna
Issue date:	05/08/2012
From:	Virginia Electric & Power Co (VEPCO)
To:	Office of Nuclear Reactor Regulation
References
12-326
Download: ML12143A136 (35)

Text

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Serial No.12-326 Docket No. 50-338 B Steam Generator Hot Leg Seal Weld Repair

V StructuralIntegrity Associates, Inc.

PHASED ARRAY ULTRASONIC EXAMINATION RECORD Examination Data Sheet No.: NAPS-SG-B-FSWOL (Informational)

Calibration Data Sheet No.: See Comments Section Date: 04/10/12 Time: 0915 through 1045 Plant: North Anna Unit: i Procedure No.: SI-UT-126 Revision: 3 Examination Scans Performed Yes No Component: DWG # 11715-WMKS-RC-E-1B.2 - Steam Generator B Inlet Nozzle FSWOL (1) Axial (Facing Downstream) 0 n-Component Configuration: Nozzle-to-Safe End Weld No.: Weld N-SE29IN-Summary N1.R1.15.004 (2) Axial (Facing Upstream) 0 E]

Weld Overlay Regions: Oveday, Overlaid Weld and Base Material (Outer 25%) Nozzle-to-Safe End (3) Circumferential (Clockwise Flow(1 )Z0 1]

Examination Surface: Surface of Weld Overlay Examination Angles (4) Circumferential (Counterclockwise (Z) 10J Weld Overlay Thickness: - 0.50 Inch Axial Circumferential Notes:

00 through 840 00 through 840 As viewed facing downstream Component Temperature: 70° F (2) Examination gain sens" was continuously adjusted to Examination Sensitivity: 51.0 dB 12) 51.0 dB (21 maintain 5% to 20% procedure specified baseline noise.

Purpose of Examinations:

1) To determine the detectability of the underlying axial flaws (previously leaking through-wall flaws).

2) To detect potential conditions in the DM weld repair region which may have resulted from welding process or from the underlying crack being drawn toward the deposited repair weld material during welding. This examination region is outlined in with red dashed lines below right.

3) To interrogate a selected region of the weld overlay material where porosity was detected during in-process PT examinations. This examination region is outlined in with blue dashed lines below right.

==

Conclusions:==

1) The two underlying axial flaws (previously leaking through-wall flaws) are detectable.

2) The repair weld region (over the axial flaws) contains neither detectable welding flaws, nor evidence that the underlying crack had been drawn outward by the deposited during repair welding.

3) The selected region of the weld overlay contains a limited amount of indications of porosity, as described in this report.

Applicable Calibration Data Sheet: NAPS SG-B WOL (Informational)

Examiner: Chad McDonald Level: II Date: 04/11/12 SI Review: John J. Hayden Level: III Date: 04/11/12 F V F Page 1 of 11

V Structural Integrity Associates, Inc.

Location of Weld RepairedExamination Region C"

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Page 2 of 11

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Location of Weld Overlay MaterialExamination Region 0

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V StructuralIntegrity Associates, Inc.

Scan I Axial Flaw #1 - Looking CW (Data acquired with front of wedge 13.0" from 900 Punch Mark)

Page 4 of 11

V StructuralIntegrity Associates, Inc.

Scan 2 Axial Flaw #1 - Looking CCW (Data acquired with front of wedge 14.0" from 900 Punch Mark)

SUnletdA-Scan Gr.l S:180A:0 Bem 49 R 48.00 S: 180.00 Main Gets PO 2 -1 83.1 1 .

1 Page 5 of 11

V StructuralIntegrity Associates, Inc.

Scan 3 Axial Flaw #1 - Looking CCW (Data acquired with front of wedge 14.0" from 900 Punch Mark) sector~iasan GO &S:180k0Beam 47 Ft 46.00 S. 160.00 Mak C 72 low I Is 11 IOO is b0 Page 6 of 11

V StructuralIntegrity Associates, Inc.

Scan 5 Axial Flaw #2 - Looking CW (Data acquired with front of wedge 14.25" from 900 Punch Mark)

Page 7 of 11

V StructuralIntegrity Associates, Inc.

Scan 6 Axial Flaw #2 - Looking CCW (Data acquired with front of wedge 15.25" from 900 Punch Mark)

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Page 8 of 11

V StructuralIntegrity Associates, Inc.

Scan 7 Axial Flaw #2 - Looking CCW (Data acquired with front of wedge 15.25" from 900 Punch Mark)

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V StructuralIntegrity Associates, Inc.

Weld Overlay Region @ TDC Porosity at 4.5" from TDC near Safe End edge of WOL sectorial scan Gr S:180A:O.Bam33 l R 32.00 S: 180.00 Main G 1.451*S Page 10 of 11

V StructuralIntegrity Associates, Inc.

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Page 11 of 11

Serial No.12-326 Docket No. 50-338 C Steam Generator.Hot Leg

i C Stmctural IntegrityAssociates PHASED ARRAY ULTRASONIC EXAMINATION RECORD Customer: Welding Services Inc. / Dominion Examination Data Sheet No.: NAPS-SG-C-FSWOL Calibration Data Sheet No.: See Comments Section Below

.Exam Start: I 04/15/12 -1100 I Exam Finish: 104/16/12 - 1350 Plant: I North Anna unit: 1 Procedure No.: SI-UT-149 Revision: 4 Examination Scans Performed Yes No Component: DWG # 11715-WMKS-RC-E-1C.2 - Steam Generator C Inlet Nozzle FSWOL (1) Axial (Facing Downstream) 0 El Component Configuration: Nozzle-to-Safe End Weld No: Weld N-SE29IN-Summary N1.R1.15.002 (2) Axial (Facing Upstream) 0 El Coverage: (See below for coverage details) Limitations: ISee Reported Conditions (3) Circumferential (Clockwise) 09 El Component Zero JX= TC, Y= +0.50" Up stream from 1Examination Surface: OD Surface (4) Circumferential (Counterclockwise) 0 El Datum Locations: Nozzle-to-Butter Interface DM Weld Width: 1.59" WOL Diameter: 42.2" WOL Temperature: 77°F Examination Angles & Scan Sensitivty Data File Names Axial 0" Axial 180' Circ 0" Circ 180" NAPS-SG-C-FSWOL- Axial Oak -3.6 to3.7 -2 to 35 NAPS-SG-C-FSWOL- Clrc Oak 2.6 to -5.2 -2 to 35 NAPS-SG-C-FSWOL- Axial Oak -3.6 to3.7 33 to 69 NAPS-SG-C-FSWOL- Circ Oak 2.6 to -5.2 33 to 68 NAPS-SG-C-FSWOL- Axial Osk -3.6 to3.7 68 to 102 NAPS-SG-C-FSWOL- CircOak 2.6 to -5.2 66 to 102 NAPS-SG-C-FSWOL- Axial Osk -3.6 to3.7 68 to 72 NAPS-SG-C-FSWOL- Circ Oak 2.6 to -5.2 100 to 138 NAPS-SG-C-FSWOL- Axial Osk -3.6 to3.7 100 to 136 NAPS-SG-C-FSWOL- Circ 180sk 2.7 to -5.3 -2 to 35 NAPS-SG-C-FSWOL- Axial I80sk 1.2to-8.1 -2 to 35 NAPS-SG-C-FSWOL- Circ 18Oak 2.7 to -5.3 33 to 68 NAPS-SG-C-FSWOL- Axial 180sk 1.2 to-6.1 33 to 69 NAPS-SG-C-FSWOL- Circ 180sk 2.7 to -5.3 66 to 102 NAPS-SG-C-FSWOL- Axial I80sk 1.2 to-6.1 66 to 102 NAPS-SG-C-FSWOL- Circ 180sk 2.7 to -5.3 100 to 136 NAPS-SG-C-FSWOL- Axial 180sk 1.2 to-6.1 102 to 136 Comments:

During the examinations, three (3) flaw indications were detected; two (2) Weld Overlay (WOL) planar flaws, one (1) WOL laminar flaw. One (1) of the two (2) planar flaws is located outside the WOL examination volume. All three (3) flaws are acceptable in accordance with ASME Section Xl, IWB-3514 and the additional requirements of Relief Request NI-14-CMP-001. See the IWB-3514 flaw characterization and evaluation on the following pages.

Examination Coverage:

Examinations achieved 90.0% coverage of the required volume of the Weld Overlay material examination volume for Laminar Flaws.

Examinations achieved 96.3% coverage of the required volume of the Weld Overlay material examination volume for Planar Flaws.

Examinations achieved 99.8% coverage of the required volume of the PSI - ISI examination volume.

Examinations achieved 100% coverage of the susceptible material within the examination PSI - ISI examination volume.

The applicable Calibration Data Sheets are listed below:

NAPS SGA / C - WOL - 0 AXIAL; NAPS SGA / C - WOL - 180 AXIAL NAPS SGA / C - WOL - 0 CIRC; NAPS SGA I C - WOL - 180 CIRC Analysis: Level: mr Date: O/SI DominionJ&JaA/ Date:

V Reviewer: Level: Date: ANII: Date:

Page I of 7

StructuralIntegrityAssociates PHASED ARRAY ULTRASONIC EXAMINATION RECORD Customer: Welding Services Inc. / Dominion Examination Data Sheet No.:INAPS-SG-C-FSWOL Examination Coverage Calculations ComponentlD: NAPS- SG- C Weld Overlay AcAcnrance Examinatidon Volume - LaminarFlaws Axial Toward Nozzle Total Area Covered Area Percent Weight Weighted Coverage 1184 1066 90.0 05 46 0 Axial TowardSafe End Total Area Covered Area Percent Weight Weighted Coverage 1184 1066 90,0 05 45.0 Circumferential CW I CCW N/A Total: 90.0 Weld Overlay Acceotance Examination Volume. PlanarFlaws Axial Toward Nozzle Total Area Covered Area Percent Weight Weighted Coverage 11.84 11.84 100,0 0.25 25.0 Axial TowardSafe End Total Area Covered Area Percent Weight Weighted Coverage 1184 1184 1000 0 25 25 0 Circumferential CW / CCW Total Area Covered Area Percent Weight Weighted Coverage 1184 1096 92 6 O5 46 3 Total: 96.3 PSI - ISI Examination Volume Axial Toward Nozzle Total Area Covered Area Percent Weight Weighted Coverage 673 6,68 99.3 0.25 24 8 Axial TowardSafe End Total Area Covered Area Percent Weight Weighted Cmerage 6 73 6 72 99 9 0 25 25 0 Circumferential CW I CCW Total Area Covered Area Percent Weight Weighted Coverage 6 73 6 73 100 05 50 Total: 99.8 Page 2 of 7

(CStructuralIntegrityAssociates PHASED ARRAY ULTRASONIC EXAMINATION RECORD xi Customer: Welding Services Inc. / Dominion Examination Data Sheet No.: NAPS-SG-C-FSWOL WOL Planar Flaw Comparison to Acceptance Standards Component ID: NAPS SG-C ASME Section X1(2004) Table IWB.3514.2 (PSI)

Raw Subsurface (S) Depth Depth Flaw Thnr. Upper (01)) Subsurface Code Flaw Flaw Flaw Flaw Flaw Oto Top O00toBottam Wall Component Acceptance Flaw Flaw Flaw Boundary Material Flaw Flow Allowable Only K%.l EFIII Lenatm ol Faan ofIFo Z TIhic*ness') Ihikne' a AAl at& pmxroimity I= Ad n14 nA~ I a eesb flnmEk 1 1.60 10.2 8.60 073 097 0.24 3.99 163 0.12 0.01 7.36 Subsurface Austenitlc 0.01 7,36% 823% 1 Acceplable (-2 to 35') Axial 1801 Sxew 2 69.8 70.2 0.40 1,28 1.48 0.20 3.99 1.63 0.10 0.2! 6.13 Subsurface Auslenltc 0.21 6A13% 8.90% 1 Acceptable (68 to72-) AXia0- Skew Note") D01WetoT, (nominal thickness)

Notel' Thickness appllcaole for flaw acceptance: Reliant upon the nominal WCL thickness above the DM wetel WOL Laminar Flaw Comparison to Acceptance Standards ASME Section Xl (2004) Table IWB-3514.3 Component ID; NAPS SG-C Relief Reaumt Accamanca Standarda Flaw Flaw Flaw Flaw Volume ASME Linear Laminar Obstructed t

Flaw Length") Length " Flaw Widthz Width(2) Flaw Flaw Flaw Obstructed WOL Code Dimension Area Volume fi. ioni End Lengtlh 2Wai Wn Width12 AreT1 a"~ hi jhyEa FieThknean Ljjnj, t12.22In. (19.43 In'l t155.2 In) Dnat.eFite 3 101 80 10460 280 -2 19 -184 035 098 1 53 004 1 63 Accent Accect Accept Accept (100' to 136" Axial 180')

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QA Total Total Flaw Flaw IE I Volume Note Ill The length axis of the laminar law is usually parallel to the direction of welding Note (2)The width axis of the laminar flaw is usually perpendicular to the direction of welding Width dimensions of laminar flaws are supplied for the above calculations are best-eflod estimates WOL Postulated Radial Flaw Obstructed by Laminar Flaws ASME Section Xl(2004) Table IWV 514.2 (PSI)

Flaw Subsurface (S) Depth Depth FlawThru. Upper (OD) Subsurface Code Flaw Flaw Flaw Flaw Flew 00 oTop ODtoBottom Well Component Acceptance Flaw Flaw Flaw Boundary Matelal Flaw Flaw Allowable Only NOj Star En Lenott of Flaw of Flaw 2a. sP Thicknkes M a al W Proximity imy aim 04% Y=sW Resu Date 3 1.60 10.2 8.60 1.53 1.E7 0.04 3.99 1.63 0.02 0.00 1.23 Su~surface Austenllic 0.00 1.23% 8.20% 1 Acceptaale 100 to 136' ioal180')

NoteW"D Weld T,(nominal thickness)

Note"n Thickness applicaole for flaw acceptance* Reliant upon the nominal WOL thcrn ass alote the Ot welb Data Analyst: 4 4 )Z Level: III Date: o/*//1 Dominion LIII: 4 4C. Date: 1k4 c~4~'z Page 3 of 7

SStructuralIntegrityAssociates Steam Generator - C: Flaw Table Planar Flaws Flaw Flaw Flow Flaw Depth JMQ to Depth to Bottmmf Flaw Thru.

No.2L Start Enjd_ Lenath Y position FlawMX Flaw Wall 2a Amplitude 1 160 102 860 1f25 to 212 0.73 0.97 0.24 2 69.8 702 040 2_16 1.28 148 02002%

Laminar Flaws Flaw Flaw Flaw Flaw Flaw Lengthll) Length Flaw Width Width Flaw Flaw No. Sr End Lenath S=rt End Width Death AmIlitd 3 101.80 104,60 280 -2.19 -184 035 13 52%

Page4 of 7

StructuralIntegrityAssociates PHASED ARRAY ULTRASONIC EXAMINATION RECORD I Customer:jWelding Services Inc. / Dominion SG - Charlie:Axial Scan (1800 Skew) lExamination Data Sheet No.: NAPS-SG-C-FSWOL WOL Planar Flaw #1 -2" to 35" +100 1800 Skew WOL Planar Flaw #1 -2" to 35" +100 1800 Skew

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StructuralIntegrityAssociates

~ SG - Charlie:Axial Scan (00 Skew)

WOL Planar Flaw #2 68" to 72" 00 Skew WOL Planar Flaw #2 68" to 72" 00 Skew i'

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AN Steamw GnraatorleNyAssociates Steam Generator C Inlet Nozzle Ultrasonic Examination Steam GeneratorC - Inlet Nozzle FSWOL - General Configuration 6.99" Safe End 5.36" 6.37" Side Reference 1.59" Punch Nozzle a Mark Side Reference Punch i-*---'-

. . Code Case N-740-2 Weld Overlay Examination Si

......... Volume Mark A-B-C-D Outer I 1.58"

'*51 I uMN Note: The interface C - DincWdes the bond and the hea-affected zone from the overlay. The HAZ extendu theAnto a -efentc weld.

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OuduralItegriy Assmcates SV Steam GeneratorC Inlet Nozzle UltrasonicExamination Steam GeneratorC - Inlet Nozzle FSWOL Weld Overlay Axial Acceptance Examintion Coverage Axial WOL La&mni Flaw I Exmk*ato Covemg a90.0%

Axal VWOL PlanarRaw Er-mbnon Coverye- 100%

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!U Scturul IategrityAssociates Steam GeneratorC Inlet Nozzle UltrasonicExamination Circumferetia WOL PlanarFlaw Steam GenratorC - Inlet Nozzle FSWOL - CircumferentielExamination Coverage Examkbftn Coverage. 0.3%

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Structural IntgdlyAssociates Steam GeneratorC Inlet Nozzle Ultrasonic Examination Steam GeneratorC - Inlet Nozzle FSWOL PSI / ISI Axial Examination Volume Coverage 2.40" L

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WBM 45" 5.47 HP WM60" 5.0UHP WOL (-10' . +101) 10. lntervals 50-100%WOL T n Axial 180 Skew WOL (25'-.75') Q 10" Intervals Pojecon 0.5" Detection / Length Sizhig 0.20r WUM 45" 5.47 HP Sizing Index Axis: 0.10 WSM 60 5.0, HP WOL (25'-45°) a 10' Intervals Proedion 0.5. Date Colection Axis:

Circ 0 Skew (CW) WBM 45' 6.29' HP All: 0.040' WB60 5.0 HP WOL (25"-AS') @ 10" Ierval Pmjecion 0.5.

Circ 180 Skew (CCW) WBM 45' 6.29W HP

_ _WBM60 5.0* HP