ML20138Q122

Weld Overlay Design & Analysis for Indications in Recirculation & RHR Sys

ML20138Q122
Person / Time
Site:	Peach Bottom
Issue date:	12/20/1985
From:	Branlund B, Chapman T, Marisa Herrera PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20138Q114	List: ML20138Q111 ML20138Q122
References
NUDOCS 8512270057
Download: ML20138Q122 (106)

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'- DOCKET No. 50-278 WELD OVERLAY DESIGN AND ANALYSIS s FOR INDICATIONS IN Tile RECIRCULATION -

- AND RESIDUAL llEAT REMOVAL SYSTEM

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DRF#137-0010 SASR 85-61 MDE-274-1285 WELD OVERLAY DESIGN AND ANALYSIS FOR THE INDICATIONS IN THE PEACH BOTTOM UNIT 3 RECIRCULATION AND RESIDUAL HEAT kEMOVAL SYSTEM Prepared by*A .h'~h w O B. J. Branlund, Engineer Structural Analysis Services Reviewed byr M.'L. He'rrera, Senior Engineer

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Structural Analysis Servicee Reviewed by: r r. >

T. L. Chipman, Consulting Engineer Plant Technology Approved by1 * ^'^ $ #

S. Ranganath,'4 tanager Structural Analysis Services Approved byt f 'Y _

/ A. E. Rogers, Manager

/ Applic1 tion Engineering Services

IMPORTANT NOTICE REGARDING THE CONTENTS OF THIS REPORT Please Read Carefully The only undertakings of General Electric Company respecting information in this document are contained in the contract between the Philadelphia Electric Company and General Electric Company, as identified in the purchase order for this report and nothing contained in this document shall be construed as char:ging the contract. The use of this information by anyone other than the customer or for any purpose other than that for which ,*t '- inrecded, is not authorized; and with respect to any unauthorize1 ust, Genttel '.lectric Company makes no representation or var: n,:;y, ep ! assumes no liability as to the completeness, accurac;,, et :sefu' ness of the information contained in this document.

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CONTENTS PAGE

1. ABSTRACT l-1

2. INTRODUCTION AND

SUMMARY

2-1

3. FRACTURE MECHANICS ANALYSIS 3-1

4. WELD OVERLAY DESIGN 4-1

5. VELD OVERLAY SHRINKAGE 5-1

6. CONCLUSIONS 6-1

7. REFERENCES 7-1 APPENDIX A Sumnary of Crack I Jication Sizing A-1 APPENDIX B Flaw Aralysis Results B-1 APPENDIX C Weld Overlay Designs C-1 APPENDIX D As-Built Shrinkage Stresses D-1 0

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TABLES Table Title Pjij gt 1 Recirculation and RHR Piping Weld 2-6 Indications Loop A 2 Recirculation and RHR Piping Weld 2-8 Indications Loop B 3 Recirculation and RHR Piping Weld 3-6 Indications Loop A - Assumptions for Analysis 4 Recirculation and RHR Piping Weld 3-8 Ir.dications Loop B - Assumptions for Analysis 5 Recirculation and RHR Piping Weld 3-10 Stresses - Loop A 6 Recirculation and RHR Piping Veld 3-11 Stresses - Loop B 7 Recirculation and RHR Piping Weld 4-5 Overlay Recommendations - Loop A 8 Recirculation and RHR Piping Weld 4-7 overlay Recorrendations - Loop B 9 Weld overlay Shrinkage Cases 5-3 0

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ILLUSTRATIONS Figure Title Fjyyt 1 Recirculation and RHR Piping Locp A 2-3 Discharge Side - Weld Identification 2 Recirculation and RHR Piping Loop A 2-4 Suction Side - Weld Identification 3 Recirculation and RHR Piping Loop B 2-5 Weld Identification 4 Crack Crowth Data 3-5 5 Large Diameter Pipe Residual Stress 3 12 6 Weld Overlay Design for 2-AS-7 4-8 7 Weld Overlay Design for 2-AS-2 4-9 8 Weld Overlay Design for 10-0-2 and 10-0-1B 4-10 9 Weld Overlay Design for 10-1B-11 4-11 10 Weld overlay Design for 2-BS-2 4-12 11 Weld overlay Design for 2-BS-8 4 13 12 Weld overlay Design for 2-BS-9 4-14 0

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1. ABSTRACT This report documents the technical basis for analyzing Intergranular Stress Corrosion Cracking indications found in the Peach Bottom Unit 3 pipe welds. Three analyses were completed:

e Fracture mechanics analysis of indications not requiring repair ,

e Design of weld overlays for indications that require repair r

e Determination of the effect of the weld overlay shrinkage on the system.

The analyses are in compliance with the requirements of the ASME Code Section XI and the NRC Ceneric Letter 84-11. The results verify that the fracture mechanics analysis and the weld overlay designs assure acceptable margina for at least 18 months of continued operation.

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2. INTRODUCTION AND

SUMMARY

2.1 Background

in 1983, 15 weld overlays were applied to Peach Bottom Unit 3 Recirculation and Residual Heat Removal (RHR) System piping welds. Ten of these were riser welds, the other five were 20" RHR suction line welds. At the same tiac many welds were treated with Induction Heating Stress Improvement (IHS1) to mitigate further cracking.

2.2 Inspection During the recent in-service inspection Intergranular Stress Corrosion Cracking (ICSCC) indications were found in 30 additional Recirculation and Residual Heat Removal System piping welds. Figures I through 3 show the locatione of the recent indications as well as the 1983 weld overlays.

2.3 Summary This report documents the technical basis for analyzing the indications (fracture mechanics), designing the veld overlays, and determining the shrinkage stress. Of the thirty welds with indications,

, eighteen required overlay repair and twelve were acceptable for continued operation without repair for at least 18 months. The remedial action taken and prior Ihat treatment history for each veld are shown in Tables 1 and 2.

I Fracture mechanien anal;'hes '*:termined acceptability without repair for many of these indications. These analyses evaluated the crack growth for one refueling cycle (18 months of operation). The analyses demonstrate compliance with the requirements of Ceneric Letter 84-11 as well as the newly developed acceptance criteria for flux weldments (Psferences I and 2).

2-1

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Weld overlay designs were provided and appited to those welds that were found to require repair. The weld oveit-lay designs provide full structural reinforcement, even with a postulated 360* through wall J crack. Therefore, uncertainty in flaw sizing does not influence the weld overlay design. These designs maintain the ASME Code safety margins, paragraph IWB-3642,Section XI (Reference 3), and are consistent with NRC positions (i.e. no credit for the first layer, l etc.).

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Shrinkage Stress analyses modeled the local axial shrinkage that  ;

l results f rom application of the weld overlay. This induced axial shrinkage will produce strennes throughout the piping system. Th<se stresses were added to the applied stresses used in the fracture mechanics analyses.

F l The three analyses are in compliance with the requiresents of the ASME Code {

Section XI and the NRC Ceneric Letter 84-11. The results verify that the

flaw acceptance analysis and the weld overlay designs assure acceptable margins for at least 18 months of continued operation.

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TABLE 1 RECIRCULATION AND RHR PIPING WELD INDICATIONS LOOP A Weld Identification Weld Type Pipe Size Disposition Treatment 2-AHJ-4 SS. Pipe # 12 Weld Overlay IHSI '83 SS. Safe End 10-0-1A SS. Pipe { 20 Weld Overlay IHSI '83 SS. Pipe 10-0-1B SS. Pipe 20 Weld overlay IHSI '83 SS. Pipe 10-0-02 SS. Pipe

• 20 Weld Overlay IHSI '83 SS. Elbow 10-0-03 SS. Elboy 20 Operate As-is IHSI '83 SS. Pipe 10-IA-4 SS. Pipe , 24 Operate As-is IHSI '83 SS. Elbow 10-IA-5 SS. Pipe 24 Operate As-is IHSI '83 Cast SS. Valve 10-IA-7 SS. Elboy 24 Operate As-is IHSI '83 SS. Pipe 2-AF-02 SS. Pip 28 Weld Overlay IHS1 '83 SS. Safe End.

! o l 2-AS-03 SS. Pipe . 28 Weld Overlay IHSI '83 SS. Elbow l 2-AS-04 SS. Elboy* 28 Weld Overlay IHSI '83 SS. Pipe 2-AS-07 55. Pipe , 28 kold Overlay IHSI '83 SS. Elbow

+ Side of Indication 2-6 i

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[_ Weld Identification Weld Type Pipe Size Disposition Treatment 2-AS-08 SS. Elbow

• 28 Operate As-is IHSI '83

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TABLE 2 RECIRCULATION AND RHR PIPING WELD INDICATIONS LOOP B WELD IDENTIFICATION WELD TYPE PIPE SIZE DISPOSITION TREATMENT 2-BHA-4 SS. Pipe # 12 Weld Overlay IHSI '83 SS. Safe End 2-BHB-4 SS. Pipe 12 Weld Overlay IHSI '83 SS. Safe End 2-BHC-4 SS. Pipe

• 12 Operate As-is IHSI '83 SS. Safe End 10-IB-3 SS. Elbow

• 24 Operate As-is No IHSI SS. Penet.

10-IB-4 SS. Pipe . 24 Weld Overlay IHSI '83 SS. Elbow 10-IB-6 SS. Pipc* 24 Operate As-is IHSI '83 Cast SS. Valve 10-IB-7 SS. Elbow 24 Operate As-is IHSI '83 SS. Pipe 10-1B-11 CS. Pipe . 24 Weld Overlay No IHSI SS. Elbow 2-BS-02 SS. Pipe 28 Weld Overlay IHSI '83 SS. Safe End.

O 2-BS-03 SS. Pipe , 28 Weld Overlay IHSI '83 SS. Elbow 2-BS-08 SS. Pipe

• 28 Weld Overlay No IHSI Cast SS. Valve

2-85-09 SS. Pipe 28 Weld Overlay IHSI '83 SS. Elbow 2-BD-ll SS. Pipe 28 Operate As-is No IHSI l Cast SS. Pipe 2-BD-12 SS. Pipe # 28 Operate As-is No IHSI Cast SS. Valve

+ Side of Indication 2-8

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3. FRACTURE MECHANICS ANALYSIS This section discusses the technical basis and results of the crack growth analyses. The discussion in this section is limited to the twelve welds with indications that were not repaired.

3.1 Method Crack growth analyses were performed to determine the depth of the cracks after 18 months of operation. The Buchalet-Bamford polynomial fit method (Reference 4) was used to calculate the stress intensity factors.

Crack growth was determined using the upper bound weld sensitized crack growth data shown in Figure 4 (Reference 5).

3.2 Assumptions The crack was conservatively assumed to have an initial depth equal to the maximum reported depth and length equal to the sum of the individual lengths.

A detailed summary of the composite crack indication sizing is shown in Appendix A. All sizing was performed by GE and most sizing was independently verified by Southwest Research Institute (SWRI). A summary of the sizing assumptions for these analyses is shown in Tables 3 and 4.

Where measured wall thickness was not available, the nominal thickness was used. This is conservative, since the as-built thickness is greater than the nominal thickness.

3.3 Stresses The applied stresses consisted of the original design stresses

( (pressure, thermal expansion, and dead weight) and weld overlay shrinkage stress, as shown in Tables 5 and 6. For the crack growth analysis these stresses were conservatively assumed to be membrane stresses. The design stresses were determined using the appropriate piping stress reports (References 6, 7, 8, and 9). Weld overlay shrinkage stresses were determined using a piping system finite element model, as discussed in Section 5 of this report.

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In addition, one of the following two residual stress distribution assumptions were applied:

Large diameter (>20 inches) pipe weld residual stress, as described in Reference 10, see Figure 5, applies to the large diameter pipes that are not treated with Induction Heating Stress Improvement (IHSI).

No credit was taken for the favorable compressive stresses in pipes that are IPSI treated. However, it was assumed that the pipe was free from the pipe weld residual stress after IHSI. The rationale for this conservative assumption is discussed in the following two paragraphs.

The IHSI treatment involves induction heating on the outer surface of the pipe while cooling the inside surface with flowing water. The effect is to create a high tensile stress on the inside surface where it is cold and compressive stress on the outside surface where it is hot.

As the pipe cools, the reversed loading produces a compressive stress on the inside surface. Tests and analyses have shown IHSI treatment to be

, effective in producing compressive residual stresses even if fairly deep (25-30%) flaws are present.

Even if the benefit of compressive IHSI stresses is not considered, the pir.sticity that occurs during this treatment will neutralize existing as welded stress distributions. Therefore, this analysis conservatively assumes no residual stress, which allows for the removal of the weld residual stress, but takes no credit for the beneficial IHSI residuci stresses.

Using these stresses, a crack growth evaluation was performed for each indication and compared to the following criteria.

3-2

3.4 criteria The first criterion is that the crack should not exceed the limit for net section collapse using a safety factor of 3.0.

The second criterion is that the crack should not exce2d 2/3 of the limits for depth and length provided in the ASME Code Section XI, Paragraph IVB-3640.

The last criterion is that the crack should not exceed the limit on allowable flaw size proposed for the ASME Code Section XI in Table IWB-3641-5. for a specific stress ratio. The stress ratio is calculated using the following equation.

Stress Ratio = M(P +P b + P,/2.77) / S ,

P, + Pb" Pressure, dead weight, and seismic stress; ksi P, = thermal expansion stress; ksi M = 1.08 S = 16.9 ksi e

3.5 Results .

Based on the evaluations, operation as-is is acceptable for the following twelve welds; the detailed results are contained in Appendix B

WELDS ACCEPTABLE FOR OPERATING AS-IS Loop A Loop B 10 0-03 2-BHC-4 10-IA-4 10-IB-3 10-IA-5 10-15-6 10-IA-7 10-IB-7 2-AS-8 2-BD-Il 2-AD-14 2-BD-12 3-3 I

4 As defined in the three criteria, the analyses demonstrate compliance i with the requirements of the NRC Generic Letter 84-11 as well as the newly developed acceptance criteria for flux weldsents.

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STRESS INTENSITY, K iksi G Figure 4 Crack Growth Data and Dispositon Cune 3-5

TABLE _ 3 RECIRCULATION AND RHR PIPING WELD INDICATIONS LOOP A-ASSUMPTIONS FOR ANALYSIS WELD WELD PTPE MEASURED CRACK CRACK

• CRACK **

IDENTIFICATION TYPE SIZE WALL THICKNESS. ORIENTATION DEPTH LENGTH TREATMENT-(in.) (in.) (%/in.) (in.)

+

2-AHJ-4 SS. Pipe 12 0.80 Circumferential 25/0.20 18 IHSI SS. Safe End 10-0-1A SS. Pipe + 20 0.84 Circumferential 30/0.252 7.25 IHSI SS. Pipe 0.82 Circumferential 25/0.205 3 10-0-1B SS. Pipe { 20 0.76 Circumferential 35/0.266 13 IHSI SS. Pipe 0.80 circumferential 25/0.200 15

& Axial u +

& 10-0-02 SS. Pipe 20 0.80 Circumferential 40/0.320- 63 IHSI SS. Elbow 10-0-03 SS. Elboy 20 0.84 Circumferential 25/0.210 16 IHSI SS. Pipe 10-IA-4 SS. Pipe . 24 1.20 Circumferential 10/0.120 1.25 IHSI SS. Elbow 10-IA-5 SS. Pipe 24 1.20 Circumferential 10/0,120 12 IHSI Cast SS. Valve 10-IA-7 SS. Elbov 24 1.15 circumferential 10/0.115 1.12 IHSI SS. Pipe +

• Maximum Crack Depth Reported

• • The Length Equals the Sum of the Individual Lengths of the Reported Indications

+ Side of Indication l

TABLE 3

• RECIRCULATION AND RHR PIPING WELD INDICATIONS LOOP A ASSUMPTIONS FOR ANALYSIS (Continued)

WELD WELD PIPE MEASURED CRACK CRACK

• CRACK ** TREATFENT IDENTIFICATION TYPE SIZE WALL THICKNESS ORIENTATION DEPTH LENGTH (in.) (in.) (%/in.) (in.)

+

2-AS-02 SS. Pipe 28 1.15 Circumferential 35/0.403 11 IHSI SS. Safe End. 1.25 Circumferential 35/0.438 39 2-AS-03 SS. Pipe

• 28 1.15 Circumferentfal 40/0.460 39 IHSI SS. Elbow 1.20 Circumferential 40/0.480 19 2-AS-04 SS. Elbow

• 28 1.25 Circumferential 45/0.562 40 IHSI SS. Pipe

• 1.125 Circumferential 40/0.450 12 2-AS-07 SS. Pipe , 28 1.30 Circumferential 35/0.455 52 IllSI

, SS. Elbow 2-AS-08 SS. Elbow 28 1.138*** Circumferential 21/0.239 36 IHSI Cast SS. Valve Peak 40/0.455 2-AS-10 SS. Pipe + 28 1.138*** Circumferential 40/0.455 53 IHS1 SS. Elbow

• Circumferential 35/0.398 66 2-AS-11 SS. Elbow

• 28 1.3 Circumferential 35/0.455 43 IHSI Cast SS. Pump Casing 2-AD-14 SS. Elbow + 28 1.45 Circumferential 20/0.29 6 IHSI Cast SS. Valve

• Maximum Crack Depth Reported

• • The Length Equals the Sum of the Individual Lengths of the Reported Indications

• • • Nominal Thickness

+ Side of Indication

TABLE 4 RECIRCITLATION AND RHR PIPING WELD INDICATIONS LOOP B ASSUMPTIONS FOR ANALYSIS WELD WELD PIPE MEASURED CRACK CRACK

• CRACK **

IDENTIFICATION TYPE SIZE WALL THICKNESS ORIENTATION DEPTH LENGTH TREATMENT (in.) (in.) (%/in.) (in.)

2-BHA-4 SS. Pipe 12 0.80 Circumferential 35/0.280 17 IHSI SS. Safe End 2-BHB-4 SS. Pipe 12 0.825 Circumferential 35/0,289 5 IHSI SS. Safe End

+

2-BHC-4 SS. Pipe 12 0.85 Circumferential 20/0,170 5 IHSI SS. Safe End u 10-IB-3 SS. Elbow 24 1.5 Circumferential 20/0.300 4 NO IHSI

$3 SS. Penet.

10-IB-4 SS. Pipe . 24 1.24 Circumferential 50/0.625 25.5 IHSI SS. Elbow 10-IB-6 SS. Pipe 24 1.25 Circumferential 10/0.125 6 IHSI Cast SS. Valve 10-IB-7 SS. Elbow* 24 1.20 Circumferential 10/0,120 4 IHSI SS. Pipe 10-IB-ll CS. Pipe . 24 1.50 circumferential 35/0.437 12 NO IHSI SS. Elbow

• Maximum Crack Depth Reported

• • The Length Equals the Sum of the Individual Lengths of the Reported Indications

+ Side of Indication

TABLE 4 RECIRCULATION AND RHR PIPING WFLD INDICATIONS LOOP B ASSUMPTIONS FOR ANALYSIS (Continued)

WELD WELD PIPE MEASURED CRACK CRACK

• CRACK **

IDENTIFICATION TYPE SIZE WALL THICKNESS ORTFNTATION DEPTH LENCTH TREATMENT (in.) (in.) (%/in.) (in.)

2-BS-02 SS. Pipe 28 1.20 circumferential 55/0.66 60.4 IHSI SS. Safe End. 1.25 Circumferential 70/0.875 47 2-BS-03 SS. Pipe + 28 1.I5 Axial & 40/0.460 37 IHSI Circumferential SS. Elbow

• 1.25 Circumferential 45/0.562 43 2-BS-08 SS. Pipe 28 1.138*** Circumfcrential 35/0.398 46 NO IHSI Cast SS. Valve

+

g 2-BS-09 SS. Pipe 28 1.15 Axial & 30/0.345 52 IHSI

& Circumferential SS. Elbow. 1.25 Circumferential 40/0.50 62 .IHSI 2-BD-Il SS. Pipe 28 1.30 circumferential 30/0.390 27 NO IHSI Cast SS. Pipe 2-BD-12 SS Pipe 28 1.138*** Circumferential 21/0.285 43 NO IHSI Cast SS. Valve Peak 30/0.341

• Maximum Crack Depth Reported

• • The Length Equals the Sum of the Individual Lengths of the Reported Indications

• • • Nominal Thickness

+ Side of Indication

TABLE I RECIRCULATION AND RHR PIPING WELD STRESSES LOOP A DESIGN DESIGN DESIGN DESIGN WELD PIPE MEASURED PRESSURE / THERMAL DEAD- SEISMIC SHRINKAGE IDENTIFICATION SIZE WALL THICKNESS STRESS EXPANSION WEIGHT STRESS STRESS (in.) .(in.) (ksi) STRESS STRESS (OBE) (ksi)

(ksi) (ksi) (ksi) 2-AHJ-4 12 0.80 1.3/5.20 8.20 2.20 0.8G -

10-0-1A 20 0.82 1.05/6.40 7.38 0.43 1.11 -

10-0-1B 20 0.76 1.05/6.90 7.90 0.46 1.19 -

10-0-02 20 0.80 1.05/6.56 6.80 0.40 1.10 -

10-0-03 20 0.84 1.05/6.25 5.60 0.30 0.80 2.0

$ 10-IA-4 24 1.20 1.3/6.50 9.30 0.20 0.80 0.0 10-IA-5 24 1.20 1.3/6.50 5.60 0.20 0.70 0.0 10-IA-7 24 1.15 1.3/6.80 10.70 0.20 0.90 0.0 2-AS-02 28 1.15 1.05/6.39 3.65 0.91 1.60 -

2-AS-03 28 1.15 1.05/6.39 2.90 1.22 1.19 -

2-AS-04 28 1.25 1.05/6.53 1.68 1,49 1.25 -

2-AS-07 28 1.30 1.05/5.65 0.80 0.70 0.60 -

2-AS-08 28 1.138* 1.05/6.46 1.00 0.43 1.28 0.1 2-AS-10 28 1.138* 1.05/6.46 0.72 0.61 1.60 -

2-AS-11 28 1.30 1.05/5.65 0.53 0.68 1.54 -

2-AD-14 28 1.45 1.3/6.28 0.88 0.70 0.85 0.70

• Nominal Thickness

TABLE 6 RECIRCl".ATION AND RHR PIPING-WELD STRESSES LOOP B WELD PIPE MEASURED PRESSURE / THERMAL DEAD- SEISMIC SHRINKAGE IDENTIFICATION SIZE WALL THICKNESS STRESS EXPANSTON WEICHT STRESS STRESS (in.) (in.) (ksi) STRESS STRESS (OBE) (ksi)

(ksi)' (ksi) (ksi) i 2-BHA-4 12 0.80 1.3/4.90 6.9 0.60 1.10 -

2-BHB-4 12 0.825 1.3/4.73 6.1 0.85 0.70 -

2-BHC-4 12 0.85 1.3/4.60 4.2 2.30 1.10 0.4 i

10-IB-3 24 1.5 1.3/5.20 6.7 0.07 1.09 1.7 10-IB-4 24 1.24 1.3/6.29 9.3 0.22 1.02 10-IB-6 24 1.25 1.3/6.24 5.1 0.40 0.60 2.7 I y 10-IB-7 24 1.20 1.3/6.50 10.4 0.17 0.50 4.2 10-1B-11 24 1.25 1.3/5.20 8.0 0.09 0.53 -

2-BS-02 28 1.20 1.05/6.12 1.25 0.44 0.79 -

, 2-BS-03 28 1.15 1.05/6.39 1.30 0.45 0.68 -

2-BS-08 28 1.138* 1.05/6.49 0.50 0.33 0,81 -

2-BS-09 28 1.15 1.05/7.91 0.56 0.37 1.34 -

l 1 i 2-BD-Il 28 1.3 1.3/7.00 0.59 0.27 1.04 1.3 2-BD-12 28 1.138* 1.3/8.00 0.71 0.27 0.77 1.0 4

• Nominal Thickness I

i 1

30 att STRESS (ksi) 0 00 + 30 O t9 0 0.25 -99 0 39 - 14.2 20 - 0 50 - 12 0 0 81 0 1.00 +81 5 10 -

f. +81 E

M 02 04 06 08 d 0 I I I I

[x att

-10 -

- 14 2

-20 ID OD CRACK DEPTH / WALL THICKNESS i 51062 8 l

l Figure 5 Large Diameter Pipe Axial Weld ResidualStress Distribution (22 in. to 28 in.)

G 3-12 l

4. WELD OVERLAY DESIGN 5 This section discusses the basis for the design of the weld overlay and the detailed geometric considerations.

4.1 Process The weld overlay designs consist of a continuous 360* band of weld metal applied to the outside surface of the pipe directly above the crack indication. The overlay weld metal is Type 308L stainless steel containing low carbon and high ferrite. It is deposited using an automatic gas tungsten are welding technique (GTAW) with water cooling the inside of the pipe. This process produces a very high quality, high toughness weld consisting of material resistant to Intergranular Stress Corrosion Cracking (IGSCC) while typically producing a compressive residual stress at the inside surface of the pipe and through a portion of the inner wall.

In accordance with the requirements of NRC Generic Letter 84-11, the overlay design thickness only includes material deposited after the first layer (or layers) that pass the liquid penetrant examination requirements. A second General Electric requirement for first layer ferrite measurement ir also applied to consider possible reduction of the weld deposit ferrite content and pick-up of carbon from the base 1

material. The ferrite content of the first layer is measured and must meet a minimun average of 8.0 Ferrite Number (FN) with no individual readings less than 5.0 FN. If the first layer fails to meet this requirement, additional layers are deposited until the required ferrite content is obtained.

This requirement, coupled with the use of 308L weld material, assures that the overlay first layer is highly resistant to IGSCC.

4.2 Assumptions Due to the conservative assumption of a through wall fully circumferential flaw, the weld overlay thickness is independent of flaw I size. Therefore, uncertainty in flaw sizing does not influence the weld overlay design.

4-1 i

The overlay is designed to provide full structural reinforcement while maintaining the ASME Code intended safety margins. This design has been termed the Type I full structural overlay. Also, no credit is taken for the beneficial compressive residual stress induced by the heat sink (water cooled) weld overlay process that would reduce crack growth through the thickness.

4.3 Methodology The methods for designing the thickness and width of the veld overlay are described in this section.

4.3.1 Thickness The minimum weld overlay thickness necessary to achieve full structural reinforcement is that thickness which provides the appropriate factor of safety against net section collapse of the adjacent material for a

. postulated 360' through wall crack. The depth at which net section collapse occurs is a function of the material flow stress, the overall wall thickness including the weld overlay, and the applied primary membrane and bending stresses. The primary membrane stress is produced by pressure, and the primary bending stress is the sun of the dead weight and seismic stresses. The stresses are summarized in Tables 3 and 4 for each weld.

0 i

Paragraph IWB-3642 of the ASME Code,Section XI can be used to determine the allowable overlay thickness using a safety factor of 3.0 on applied loading. Assuming that the indication is fully circumferential, the method described in Reference 11 can be used. In the reference report Equations (1) and (2) define a relationship between the applied loads, the flow stress, and the critical ctrek depth to pipe thickness ratio.

(1)

/3 = Tr ( 1 - a/t - P /dr'f )

2 - a/t (2)

P b

=

2 cf'f (2-a/t) sin /3 TI 4-2

= Material Flow Stress = 3 S where: ci'f m P = Primary Membrane Stress P = Primary Bending Stress b

a = Crack Depth (equal to pipe wall thickness) t = Total Thickness (pipe wall + weld overlay thickness)

An iteration scheme is performed using these equations until the minimum required weld overlay thickness is determined. A factor of safety of 3.0 is used in accordance with 1WB-3642. Since the weld overlay is composed of tough GTAW weld material, the criterion for flux weldments does not apply.

As discussed previously weld overlays do not include the first layer or layers that do not pass liquid penetrant examination or delta ferrite requirements. This is to consider any potential cracking defects that night propagate to the first layer, as well as possible dilution (reduction) of ferrite and increase in the carbon content in the first layer.

4.3.2 Vidth Unlike the thickness requirements for veld overlay designs, there are no O

specific requirements for the weld overlay widths. However, the overlay width must be sufficient to provide structural reinforcement and access for future overlay in-service inspection. As it became apparent that a large number of overlays would be required, the need to minimize system shrinkage stress was identified. Therefore, finite element analyses were performed to justify minimizing the width of the weld overlay.

This analysis showed that a minimum weld overlay width of [Rt (where R =

radius and t = vall thickness) provides the required structural reinforcement and overlay design margins. In addition, UT inspection

,during this outage of the 1983 20" RHR overlays confirmed that this narrower design could be successfully in-service examined should operation beyond one refueling cycle be desired. Accordingly, this design was implemented on all remaining overlays.

4-3

l i

4.4 Results The weld overlay designs are summarized in Tables 7 and 8; detailed results are contained in Appendix C. The typical wide and narrow designs are shown in Figures 6 and 7. Other representative designs are i shown in Figures 8 through 12.

The specific overlay design for each weld was based on consideration of such factors as:

o Weld crown geometry, o proximity to other welds, valves, and carbon steel pipes, and j 3

o ultrasonic testing requirements for future in-service inspection.

The slope of the overlay end was set to one-to-one (width-to-thickness) for geometric considerations and to reduce stress concentration effects.

Some earlier designs used a three-to-one slope, however, the one-to-one 4 slope is fully acceptable from a Code stress concentration and piping fatigue usage point of view. The one-to-one slope also provides greater straight length on the overlay outside diameter surface for UT angle beam examination.

O The weld overlay designs provide conservative safety margins for a typical Type I full structural overlay and are acceptable for at least 18 months of continued operation.

4 4-4

TABLE 7 RECIRCULATION AND RHR PIPING WELD OVERLAY RECOMMENDATIONS LOOP A WELD WELD - PIPE MEASURED CPACK OVERLAY DESIGN IDENTIFICATION TYPE SIZE WALL THICKNESS ORIENTATION THICKNESS * / WIDTH (in.) (in.) (in.) /(in.)

2-AHJ-4 SS. Pipe 12 0.80 Circumferential 0.25/5.0 SS. Safe End 10-0-1A SS. Pipe 20 0.84 Circumferential 0.26/3.5 SS. Pipe + 0.82 Circumferential 10-0-1B SS. Pipe 20 0.76 Circumferential 0.26/ Note SS. Pipe + 0.80 Circumferential & Axial ,

u 10-0-02 SS. Pipe

• 20 0.80 Circumferential 0.26/ Note 4, SS. Elbow (Note: Length was adjusted to consider proximity of welds 10-0-1B and 10-0-2 to each other.

The overlay length is continuous between the welds and extends 2.5 inches beyond the centerline of each weld).

2-AS-02 SS. Pipe 28 1.15 Circumferential 0.39/4.15 SS. Safe End+

2-AS-03 SS. Pipe 28 1.15 Circumferential 0.39/4.3 SS. Elbow + 1.20 Circumferential 2-AS-04 SS. Elbow

• 28 1.25 circumferential 0.39/4.8 SS. Pipe + 1.125 Circumferential 2-AS-07 SS. Pipe 28 1.30 Circumferential 0.36/4.5 SS. Elbow +

• Min Overlay Thickness After First Layer to Pass all required examinations.

+ Side of Indication.

TABLE 7 RECIRCULATION AND RHR PIPING WELD OVERLAY RECOMMENDATIONS LOOP A (Continued)

WELD WELD PIPE MEASURED CRACK OVERLAY DESIGN IDENTIFICATION TYPE SIZE WALL THICKNESS ORIENTATION THICKNESS * / WIDTH (in.) (in.) (in.) /(in.)

2-AS-10 SS. Pipe 28 1.138** Circumferential O.38/4.5 SS. Elbow + Circumferential 2-AS-Il SS. Elbow

• 28 1.30 Circunferential 0.39/3.5 Cast SS. Pump Casing

• Min Overlay Thickness After First Layer to Pass all required examinations 4, ** Nominal Thickness

+ Side of Indication e

TABLE 8 RECIRCULATION AND RHR PIPING WELD OVERLAY RECOMMENDATIONS LOOP R WELD WELD - PIPE MEASURED CRACK OVERLAY DESIGN i IDENTIFICATION TYPE SIZE WALL THTCKNESS ORIENTATION THICKNESS * / WIDTH (in.) (in.) (in.) /(in.)

i 2-BHA-4 SS. Pipe 12 0.80 Circumferential 0.21/5.0 SS. Safe End 2-BHB-4 SS. Pipe 12 0.825 Circumferential 0.21/5.0 SS. Safe End 10-IB-4 SS. Pipe . 24 1.24 Circumferential 0.37/6.0 SS. Elbow 10-IB-11 CS Pipe 24 1.5 Circumferential 0.35/3.0 SS. Elbow*

• 2-BS-02 SS. Pipe 28 1.20 circumferential 0.34/6.0 7 SS. Safe End. Circumferential 2-BS-03 SS. Pipc* 28 1.15 Axial & Circumferential 0.34/6.0 SS. Elbow. 1.25 Circumferential 2-BS-08 SS. Pipe

• 28 1.138** Circumferential 0.345/ Note Cast SS. Valve (Note: Length was adjusted to consider proximity to the valve.

The length is 3.0 inches on the pipe side and blended on the valve side) 2-BS-09 SS. Pipe

• 28 1.15 Axial & Circumferential 0.435/4.5 SS. Elbow, 1.25 Circumferential

• Min Overlay Thickness After First Layer to pass all required examinations

• • Nominal Thickness

+ Side of Indication

WELD Q

3 0* MIN _ _

3 0" MIN 0 36' MIN OVERLAY THICKNESS AFTER 3, FIRST LAYER g 1 MIN

'.___....... 1- 1 ,71 1 1 11 1 - 1 LOPE il OVERLAY FIRST LAYER WELD l

PIPE ELBOW CRACK INDICATION vosa e Figure 6 Wide Weld Overlay Design for Weld 2-AS-7 (Typical Wide Design) l l

l l

t l

4-S

~

WELD Q

415' MIN

_15" MIN FROM _ _15* MIN FROM _

' EDGE OF WELD ' I ' EDGE OF WELD CROWN '

CROWN 1 Y 1

I

__I __

.m-_

0 39 MIN OVERLAY THICKNESS OVERLAY FIRST LAYER WELD AFTER FIRST LAYER

• PIPE SAFE END CRACK INDICATION Stos? 1C Figure 7 Narrow Weld Overlay Design for Weld 2-AS-2 (TypicalNarrow Design)

S

+

4-9

s MIN SLOPE WELD WELD I OVERLAY F6RST LAYER k

~

2 5- MIN _

54-

\ _

2.5" MIN _

1 7. . _ _ _ _ _ _ z _ _- _ _ ....=.--____....___.._...)

--l _____ __T1 l WELD WELD 7 0 26* MIN OVERLAY f

) ELBOW io.o.2 PIPE 10-01 B THICKNESS AFTER I FIRST LAYER PIPE ;l CRACK INDICATIONS CRACK INDICATIONS 510e211 l 0 Figure 8 Weld Overlay Design for 10 0-2 and 10-0-1B l

I e

O 4-10

WELD Q

30* MIN _ OVERLAY FIRST LAYER MIN 1/4" 21/16~ *

• 0 35 MIN. OVERLAY THICKNESS FROM EDGE OF AFTER FIRST LAYER BUTTER y 3 y 1 MIN. SLOPE F f ,}

PIPE WELD ELBOW l CARBON STEEL STAINLESS STEEL

) I l i I

J CRACK INDICATION WELD BUTTER sios212 Figure 9 Weld Overlay Design for Weld 10-18-11 S

4-11

r WELD 4 3" MIN 15" MIN FROM 1.5* MIN FROM EDGE OF WELD EDGE OF WELD CROWN p CROWN 1

1 MIN. SLOPE

-......... ....-.=.____:_.... .....

0 345" MIN OVERLAY THICKNESS WELD

\ OVERLAY FIRST LAYER AFTER FIRST LAYER l

1

[

ySEE SEAL PLUG DRAWING SAFE END s

PART DF tutIGINAL VELD Di m m S SEAL PLUG l

\ l Y l

- . -/ _ _ _N. N. . . .

N f

1.375-Circular Seal Plug - (At Core Sample) 51082 13 Figure 10 Weld Overlay Design for Weld 2 BS-2 (Including Repair of Metallurgical Core Sample Hole) 4-12

WELD

, 9 30- MIN _

i 0 345" MIN OVERLAY THICKNESS AFTER FIRST LAYER MIN SLOPE u I

~

W .,

L /

f WELD PIPE VALVE f

1 \t CRACK INDICATION 61002 to Figure 11 Weld Overlay Design for Weld 2-BS 8 e

4-13

WELD E

4 5' MIN

l =

15" MIN FROM 1.5" MIN FROM EDGE OF WELO EDGE OF WELD 1

~ CROWN CROWN 1ll> p I

OVERLAY FIRST LAYER 1 MIN. SLOPE o

q l 0 435" MIN OVERLAY THICKNESS ELBOW WELD AFTER FIRST LAYER PIPE CRACK INDICATION Stos2 iS o

Figure 12 Weld Overlay Design for Weld 2-BS-9 r

I i

I e

4-14 l

i

5. WELD OVERLAY SHRINKAGE Shrinkage analyses were performed to simulate the local axial shrinkage that results from application of the weld overlay. This induced axial shrinkage will produce stresses through the piping system.

5.1 Method The analysis was performed using the piping analysis code, PISYS (Reference 12) and a finite element model of the Peach Bottom Unit 3 piping system. Four shrinkage analyses were performed during the course of the outage to determine the shrinkage stresses for joints known to require weld overlays. As additional welds were found to require overlay repair, shrinkage stresses were re-evaluated. These four cases are shown in Table 9 (see Figures 1 through 3 for veld locations).

5.2 Assumptions The weld overlay shrinkage values are based on measured shrinkages for completed weld overlays and assumed shrinkages for weld overlays not completed at the time of the analysis. The assumed shrinkages are based on mockup and field experience and are considered conservative.

Following the completion of the overlay welding, a shrin': age analysis of a the entire system was completed using measured shrinkages.

The shrinkage values and welds analyzed for each case are summarized in Table 9. The effective width in Table 9 is the distance along the pipe over which the shrinkage is applied in the model. This distance is typically about 1 inch beyond the ends of the overlay, and is consistent with the location where axial shrinkage measurements are made. The l stresses are summarized in Tables 3 and 4. The final as-built shrinkage

! stresses for the entire system are summarized in Appendix D.

l l

1^

l l 5-1 l

I

5.3 -Results Presently, there are no specific Code requirements regarding shrinkage stress. However, weld shrinkage stress is similar in nature to cold spring stress. These are acceptable since the stresses are well below the material yield strength. The weld shrinkage stress, which could be considered a sustained stress, requires special evaluation for crack indications that are recommended for operation as-is. Therefore, these stresses were added to the applied stresses used in the fracture mechanics analyses, i

O

! 5-2 i

4 i

i--

TABLE 9 WELD OVERLAY SHRINKAGE CASES Case 1: A shrinkage analysis of the Loop B 24" RHR with shrinkages on the following welds.

SHRINKAGE EFFECTIVE WIDTH WELD INCH INCH LOOP B 24" RHR 10-IB-3 0.375 4.0 10-IB-4 0.375 6.0 10-IB-6 0.375 6.0 10-IB-7 0.375 6.0 10-IB-11 0.020 6.0 Case 2: A shrinkage analysis of the Loop A 20" RHR with shrinkages on the following welds.

SHRINKAGE EFFECTIVE WIDTH WELD INCH INCH LOOP A 20" RHR 10-0-2 0.13* 6.0 10-0-1A 0.25 6.0 10-0-1B 0.25 6.0 10-0-5 0.33* 6.0 10-0-6 0.18* 6.0 10-0-7 0.19* 4.0 10-0-10 0.17* 4.0

10-0-15 0.15* 4.0 o

• As built shrinkage 5-3

TABLE 9 WELD OVERLAY SHRINKAGE CASES (Continued) r Case 3: A shrinkage analysis of the Loop A 20" RHR and 28" Line with shrinkages on the-following welds.

SHRINKAGE EFFECTIVE WIDTH WELD INCH INCH LOOP A

, 20" RHR 10-0-2 0.13* 6.0 10-0-1B 0.25 6.0 10-0-5 0.33* 6.0 10-0-6 0.18* 6.0 10-0 0.19* 4.0 10-0-10 0.17* 4.0 10-0-15 0.15* 4.0 28" Line 2-AS-2 0.19 8.0 2-AS-3 0.19 8.0 2-AS-4 0.19 8.0 2-AS-7 0.19 8.0 2-AS-8 0.19 8.0 2-AS-10 0.19 8.0

. 2-AD-14 0.19 8.0

-Case 4: A shrinkage analysis of the Loop B 28" Recirculation Line with shrinkages on the following welds.

SHRINKAGE EFFECTIVE WIDTH WELD INCH INCH o

3 2-BS-2 0.19 8.0 2-BS-3 0.19 8.0 2-BS-8 0.19 8.0 f

i

• As built shrinkage l

l I

5-4 l

l

6. CONCLUSIONS Where appropriate, fracture mechanics analyses and weld overlay designs were prepared for the indications in the Peach Bottom 3 recirculation and residual heat removal systems. A summary of the resolution for each weld is shown in Tables 1 and 2. Details of the flaw evaluation are shown in Appendix B. The weld overlay dimensions are summarized in Tables 7 and 8; detailed results are contained in Appendix C.

Of the 30 new crack indications reported during this outage the following dispositions have been applied:

e 12 welds are acceptable for operation without repair for at least 18 months, e 18 welds were repaired with a full structural overlay.

The analyses and overlay repair program are in compliance with the requifements of the ASME Code Section XI and the NRC Generic Letter 84-11. The analyses and repairs provide the technical justification for return to service of the piping system and operation for at least 18 months, a

4 e

P I- 4 a

l 6-1

7. REFERENCES

1. Letter to All Licensees of Operating Reactors, Applicants for Operating License, and Holders of Construction Permits for Boiling Water Reactors from United States Nuclear Regulatory Commission.

Inspections of BWR Stainless Steel Piping (Generic letter 84-11),

Nuclear Regulatory Commission Washington, D.C., April 19, 1984.

2. Letter to Task Group, R. Canble, S. Bush, and B.D. Liaw from Section XI Task Group on Piping Flaw Evaluation, Evaluation of Stainless Steel Flux Weldments: (a) Proposed Code Copy Modification to IWB-3640, (b) Technical Basis Document, March 29, 1985.

3. ASME Boiler and Pressure Vessel Code,Section XI, 1980 Edition, including Appendix X, " Acceptance Criteria for Flaws in Austenitic Piping," approved April 1983.

4. C. B. Buchalet and W. H. Bamford, " Stress Intensity Factor Solution for Continuous Surface Flaws in Reactor Pressure Vessels,"

Mechanics of Crack Growth ASTM STP 590, 1976.

5. R. M. Horn and S. Ranganath, " Determination of Crack Growth Rates in Sensitized Austenitic Piping,"

o Proceedings: Second Seminar on Countermeasures for Pipe Cracking in BWRs, Volume 1: Problem Resolution, EPRI, Palo Alto, CA, (EPRI NP-3684-SR), September, 1984, pp. 10-iii through 10-12.

6. B. Cheek, Peach Bottom Recirculation System Design Recirculation System Design Report, General Electric - Nuclear Energy Division, San Jose, CA, October 27, 1970, (22A2619). Used for Loop A Recirculation System.

7. Computer Analysis of the Loop A 20" RHR from Bechtel. ,

7-1

Y

• ',. t l '% ,y i

\

! 6 i 7. REFERENCES (Continued)

8. T. V. Pham, Peach Bottom Recirculation System Design Recirculation System Design Report Loop B, General Electric - Nuclear Energy

. Business Group, October 9, 1981, (22A6081).

4

9. Computer Analysis of the Loop B 20" RHR from Bechtel.

10. General Electric Company, The Growth and Stability of Stress Corrosion Cracks in Larg'e Diameter BWR Piping, Electric Power Research Institute, PalosAlto, CA, July 1982, (EPRI NP-2472 Volume 2).

11. Ranganath, S. and Mehta, H.S., " Engineering Methods for the Assessment of Ductile Fracture Margin in Nuclear Power Plant Piping," Ela'stic-Plastic Fracture: Second Symposium, Volume II Fracture Resistance Curves and Engir.eering Applications, ASTM STP-803, 1983, pp. 309-330.

12. PISYS05, GE Piping System Analysis Computer Program, NEDE-24077, April 1979.

I i i O

4 C

{+

t 6

4 7-2 s

A

APPENDIX A Summary of Crack Indication Sizing This appendix contains a detailed summary of the Peach Bottom Unit 3 crack indication sizing, i CONTENTS TABLE TITLE A.1 Recirculation and RHR Piping Weld Indications Loop A A.2- Recirculation and RHR Piping Weld Indications Loop B h

1 A-1 L.

TABLE A.1 Recirculation and RHR Piping Weld Indications Loop A Weld Type Pipe Measured Crack Indications Dispcsition Weld Ident. Size Wall Thk. Length / Depth (in. ) (in.) ( in. / */. . )

+ / 20-25 Weld Overlay 2-AHJ-4 SS. Pipe 12 0.80 0- 1 SS. Safe End . 4- 16 / 20-25 17 - 19 / 20-25 28 - 29 / 20-25 36 - 3B / 20-25

+

10-0-1A SS. Pipe 20 0.84 13 - 17 / 15 Weld Overlay 59.5 - 62.75/ 30 SS. Pipe 0.82 58 - 61 / 25 10-0-1B SS. Pipe 20 0.76 2- 4 / 35 Weld Overlay 10 - 11 / 15-25 12.5 - 13.5 / 15-25 25 - 26 / 15-25 46 - 48 / 15-25 52 - 58 / 15-25

+

SS. Pipe 0.80 23 - 28 / 15-25 43 - 44 / 15-25 52 - 61 / 15-25 10-0-02 SS. Pipe 20 0.80 360 / 5-40 Weld Overlay SS. Elbow o ___ _ _ _ _

10-0-03 SS. Elbow 20 0.84 0-2 / 25 Operate As-is SS. Pipe 14 - 19 / 20 39 - 42 / 22 58 - 64 / 25 10-IA-4 SS. Pipe , 24 1.20 0- 1.25 / 10 Operate As-is SS. Elbow

+

10-IA-5 SS. Pipe 24 1.20 0-2 / 5 Operate As-is Cast SS. Valve 22 - 24 / 10 56 - 64 / 5-10 l Side of Indication A-2 i

h ..

I TABLE A.1 Recirculation and RHR Piping Weld Indications Loop A (Continued)

W21d Weld Type Pipe Measured Crack Indications Disposition Ident. Size Wall Thk. Length / Depth (i n. ) (i n. ) ( in. /  %.)

10-IA-7 SS. Elbow 24 1.15 1.125-2.25 / 5-10 Operate As-is SS. Pipe

+

2-AS-02 SS. Pipe 28 1.15 0- 3 / 30-35 Overlay 75 - 80 / 30-35 86 - 89 / 30-35 SS. Safe End 1.25 6 - 20 / 30-35 28 - 32 / 30-35 63 - 80 / 30-35 85 - 89 / 30-35

-_ ---- =

+

2-AS-03 SS. Pipe 28 1.15 7 - 12 / 25 Overlay 18 - 19 / 30 36 - 40 / 30 47 - 62 / 35 70 - 83 / 35-40 88 - 89 / 20

+

SS. Elbow 1.20 2 - 10 / 40 75 - 86 / 40 2-AS-04 SS. Elbow 28 1.25 5- 13 / 40-45 Overlay

. 34 - 38 / 40 47 - 54 / 25 67 - 88 / 25-40 SS. Pipe 1.125 0 / 25 17 / 30 25 / 30 44 / 35 i 53 - 57 / 35 67 - 75 / 25-40 2-AS-07 SS. Pipe . 28 1.30 4 - 30 / 20-35 Overlay SS. Elbow 47 - 49 / 20 61 - 85 / 15-30

[ Side of Indication Nominal Thickness, Not Measured A-3

TABLE A.1 Recirculation and RHR Piping Weld Indications Loop A (Continued)

Wald Weld Type Pipe Measured Crack Indications Disposition Ident. Size Wall Thk. Length / Depth (in.) (in.) ( in. / */. )

2-AS-08 SS. Elbow 28 1.138 O-4 / 20 Operate As Is Cast SS. Valve 18 - 40 / 20-40 54 - 58 / 20-35 74 - 78 / 20 88 - 90 / 20 2-AS-10 SS. Pipe 28 1.138 11 - 16 / 20-25 Weld Overlay 22 - 40 / 15-40 46 - 55 / 30 58 - 72 / 30-35 77 - 84 / 30

+

SS. Elbow 0 - 50 / 20-35 54 - 58 / 20 62 / 20-30 67 / 20-30 70 / 20-30 76 - 88 / 15-35

=_ ___ - - - _ _ -__________

2-AS-11 SS. Elbow 28 1.30 0- 14 / 20 Weld Overlay Cast SS. Pump Casing 16 - 20 / 30 35 - 41 / 30 44 - 50 / 35 53 - 54 / 20

. 57 - 60 / 35 71 -

76 / 30 86 - 90 / 35 1 _ __________ _ _- ---_______ --

l +

L 2-AD-14 SS. Elbow 28 1.45 42 - 48 / 20 Operate As-is Cast SS. Valve l __ __-

+

, Side of Indication i Nominal Thickness, Not Measured l

l i

l A-4 l

l t

TABLE A.2 Recirculation and RHR Piping Weld Indications Loop B W21d Weld Type Pipe Measured Crack Indications Disposition Ident. Size Wall Thk. Length / Depth (in. ) (in. ) ( in. /  %.)

+ Weld Overlay 2-BHA-4 SS. Pipe 12 0.E0 0- 1 / 10-15 SS. Safe End 4- 7 / 10-15 21 - 29 / 5-10 33 - 40 / 10-35 2-BHB-4 SS. Pipe 12 0.825 8 - 11 / 18-20 Weld Overlay SS. Safe End 17 - 19 / 25-35

+

2-BHC-4 SS. Pipe 12 0.85 17 - 20 / 15-20 Operate As-is SS. Safe End 24 - 26 / 15-20 10-IB-3 SS. Elbow 24 1.5 57 - 59 / 18-20 Operate As-is SS. Penet. 69 - 71 / 15-20

_ .- . = _ _ - - - ---_________ ---

10-IB-4 24 1.24 16 - 25 / 40-50 Weld Overlay SS. Pipe .

SS. Elbow 25 - 26.5 / 20 26 - 28 / 35-40 28 - 36 /<20 36 - 40 /<20 47 - 48 / 20

• 5-10 Operate As-is 10-IB-6 SS. Pipe 24 1.25 34.5- 36 /

• Cast SS. Valve 62 - 66.5 / 5-10 24 1.20 9 - 13 / 10 Operate As-is 10-1B-7 SS. Elbow+

SS. Pipe 1

59 - 68 / 35 Weld Overlay

' 10-IB-11 CS. Pipe . 24 1.5 SS. Elbow

(- _____________________=_----

+

Side of Indication l

l l

A-5 l

1

TABLE A.2 Recirculation and RHR Piping Weld Indications Loop B (Continued)

Weld Type Pipe Measured Crack Indications Disposition WJ1 d Size Wall Thk. Length / Depth Ident.

(in.) (in.) ( in. /  %.)

+ / 35-40 Weld Overlay 2-BS-02 SS. Pipe 28 1.20 0 - 30 41 - 50 / 25-40 60 - 75 / 55 85 - 90 / 40 SS. Safe End+ 1.25 13 - 27 / 40-60 35 - 50 / 50-70 60 - 70 / 50-57 82 - 90 / 25

^

2-BS-03 SS. Pipe 28 1.15 0 - 25 / 20-40 Weld Overlay 63 - 65 / 15 73 - 75 / 15 82 - 90 / 10-15

+

SS. Elbow 1.25 0 - 32 / 25-45 70 - 73 / 25 77 - 80 / 30 85 - 90 / 25 2-BS-CB SS. Pipe 28 1.138 16 - 19 / 20 Weld Overlay Cast SS. Valve 22 - 31 / 15-30 43.5 '60.5 / 15-30

.' 63 - 70 / 15-30 72 - 79 / 15-20 81 -

85 / 15-35

• Weld Overlay 2-BS-09 SS. Pipe 28 1.15 4 - 27 / 10-30 28 / 20 40 - 45 / 20-25 52 - 54 / 10-25 59 - 67 / 10-25 73 - 83 / 10-25 85 - 89 / 10-30

+

SS. Elbow 1.25 3 - 16 / 10-30 18 - 44 / 10-30 47 - 50 / 10-25

- 57 - 58 / 10-25 67 - 86 / 10-40

, Side of Indication Nominal Thickness, Not Measured A-6

TABLE A.2 Recirculation and RHR Piping Weld Indications Loop B

! (Continued) 4 Wald Weld Type Pipe Measured Crack Indications Disposition Ident. Size Wall Thk. Length / Depth (in.) (i n. ) ( in. / */. . )

+ / 19-20 Operate As-is 2-BD-11 SS. Pipe 28 1.3 0- 2 Cast SS. Pipe 5- 6 / 15-20 9- 11 / 20-30 14 - 17 / 19-20 19 - 21 / 20-30 25 - 30 / 12-20 35 - 39 / 12 50 - 54 / 15-30 56 - 59 / 20-30 88 - 89 / 19-20 2-BD-12 SS. Pipc 28 1.138 3 - 11 / 20-30 Operate As-is Cast SS. Valve 16 - 17 / 25-30 22 - 25 / 20 35 - 41 / 5 46 - 60 / 20-25 63 - 68 / 20-30 75 - 81 / 20

+

Side of Indication

1. Nominal Thickness, Not Measured 4

f 4

I A-7 4

l l

APPENDIX B Flav Evaluation Results r

i This appendix contains the results of the Peach Bottom Unit 3 fracture mecharsics analyses for the flaws that were acceptable to operate as-is.

B.1 Stresses I

The applied stresses consisted of the pressure, thermal expansion, dead weight and shrinkage stress. In addition, one of the following two residual stress distribution assumptions were used:

} Large diameter (>20 inches) pipe weld residual stress applies to

! large diameter pipes that are not treated with Induction Heating Stress Improvement (IHSI).

I i No credit was taken for the favorable compressive stresses in pipes that are IHSI treated. However, it was assumed that the pipe was free from the pipe weld residual stress after IHSI.

i B.2 Assumptions The crack was conservatively assumed to have an initial depth equal to the maximum reported depth and length equal to the sum of the individual lent,th s . In addition welds 2-AS-8 and 2-BD-12 were analyzed using the 0

average depth since the measured maximum depths were highly localized peaks (or cusps) at separate locations.

l A crack growth evaluation was performed for each crack indication and i compared to the following criteria.

l i

t B-1 i

i i

i

- - . . . y -.-.-..m_--,-.--ym,-,,,,_,,,. ,,,,___,,,-..-.-.,____m--_----.-.__.-,,m,-_m,.,-.m.,_.-_.,-.,. -

m-., . - _ - . - - - -

B.3 Criteria The limits for each criterion are based on pressure and piping stresses calculated for each weld.

The first criterion was that the crack should not exceed the limit for net section collapse using a safety factor of 3.0.

The second criterion was that the crack should not exceed 2/3 of the limits for depth and length provided in the ASME Code Section XI, Paragraph IWB-3640.

The last criterion was that the crack should not exceed the limit on allowable flaw size, proposed for the ASME Code Section XI in Table IWB-3641-5, for a specific stress ratio.

B.4 Results Based on the evaluations, operation as-is is acceptable for the following twelve welds. As shown in these figures, the analyses demonstrate compliance with the requirements of the NRC Generic Letter 84-11 as well as the newly developed acceptance criteria for flux weldments.

4 B-2

1 1

CONTENTS FIGURE TITLE B.1 Flaw Acceptance Diagram for Weld 10-0-03 No Credit for IllSI B.2 Flaw Acceptance Diagram for Weld 10-1A-4 No Credit for IHSI Flaw Acceptance Diagram for Weld 10-1A-5 B.3 No Credit for IHSI Flaw Acceptance Diagram for Weld 10-1A-7 B.4 No Credit for IHSI B.5 Flaw Acceptance Diagram for Weld 2-AS-8 No Credit for IHSI - Assumitg Average Flaw Depth B.6 Flaw Acceptance Diagram for Weld 2-AS-8 No Credit for IHSI - Assuming Maximum Flav Depth B.7 Flaw Acceptance Diagram for Weld 2-AD-14 No Credit for IHSI B.8 Flaw Acceptance Diagram for Weld 2-BHC-4 No Credit for IHSI

^

B.9 Flaw Acceptance Diagram for Weld 10-1B-3 Large Diameter Pipe Residual Stress B.10 Flaw Acceptance Diagram for Weld 10-1B-6 No Credit for IHSI B.ll Flaw Acceptance Diagram for Weld 10-1B-7 o No Credit for IHSI B.12 Flaw Acceptance Diagram for Weld 2-BD-11 Large Diameter Pipe Residual Stress ,

. B.13 Flaw Acceptance Diagram for Weld 2-BD-12 Large Diameter Pipe Residual Stress Assuming Average Flaw Depth B.14 Flaw Acceptance Diagram for Weld 2-BD-12 Large Diameter Pipe Residual Stress Assuming Maximum Flaw Depth B-3

10 I i i i l l i i 09 - -

IWB-3642 08 - ALLOWABLE 2'3 CODE ALLOWABLE GENE AIC LETTE A 84-11

,. 07 -

AEOUI AE VE NT PAOPOSED CODE a

i a - - - - - -

,- , lLs'L'Is" -

o a  %

4 05 -

D \-_-________

9 y 04 - C AACK GAOWTH IN .

5 to MONiss Or OPERATION h NO C AEDIT FOR IH$l 03 - .

(b 02 - -

01 - -

I f f f I i i l i e

00 01 02 03 04 05 06 07 08 09 10 NON DivtN5 TON AL LENGTH - Lis2* n' A>

sat .e i

figure B 1 Flaw Acceptance Diagram for Weld 10 0-03 No Credit for IHSI I

l l

i e

O B-4

APPLIED STRESS FOR WELD 10-0-3 t!EMBRANE_ST,RE;S.S :

Pressure = 6.3 kai Thermal Expansion = 5.6 kai Dead Weight = 0.3 kai Shrinkage = 2.0 kai

' BENDING STRESS:

No Residual Stress e

l l

f j B-5 n

i i

1

10 e i i i i i i s 09 -

IWB-3642 08 _ 2/3 CODE ALLOWABLE ALLOWABLE -

GENERIC LETTER 8411 REQUIAEVENT g 07 Q

l PROPOSED CODE

{ 06 ---"="==g CRITERIA FOR w  % FLUX WELDS o  %

05 -

\

\ -- - ------

5 03 -

02  ;

CRACK GROWTH IN 18 MONTHS OF OPERATION 0t il NO CREDIT FOR IHSI t I I i i ft i l i 00 01 02 03 04 05 06 07 08 09 10 e

NON. DIMENSIONAL LENGTH - L/(2* e'R) siosi o Figure B 2 Flaw Acceptance Diagram for Weld 10 IA-4 No Credit for IHSI 0*b l

l i

APPLIED STRESS FOR WELD 10-IA-4 MEMBRANE _ STRESS:

Pressure = 6.5 ksi Thermal Expansion = 9.3 ksi Dead Weight = 0.2 kai Shrinkage = 0.0 ksi DENDING_ STRESS:

No Residual Stress O

B-7

10 i i i i i i i i 09 - -

IWB-3642 ALLOWABLE 08 - -

2/3 CODE ALLOWABLE GENERIC LETTER 8411 REQUIREMENT 07 - ,

t l PROPOSED CODE I 06 - - - - - - - _ - - CRITERIA FOR -

$ FLUX WELDS d  %

1. Os -

\___ _ _ _ _ _ -

z y 04 - -

5 03 - -

02 - -

'l CRACK GROWTH IN 18 MONTHS OF OPERATION 01 -

O NO CREDIT FOR IHSI -

1 1 1 i i i i l i e

00 01 02 03 04 0$ 06 07 08 09 to NON DIMENSIONAL LENGTH - L/(2* e'R; sioes to Figure B 3 Flaw Acceptance Diagram for Weld 10 IA 5 No Credit for IHSI e

T l B-8 i

l

[

APPLIED STRESS FOR WELD 10-IA-5 MEMBRANE STRESS:

Pressure = 6.5 ksi Thermal Expansion = 5.6 kai Dead Weight = 0.2 kai Shrinkage = 0.0 kai B.E_N_D_I NG_ STRESS :

No Residual Stress B-9

10 i i i e i i i i i 09 - -

IW3 3642 ALLOWABLE 08 -

2/3 CODE AL'.OWABLE -

GENERIC LETTER 8411 REQUIREMENT 07 -

t

) PROPOSED CODE CRITERIA FOA I 06 -- --

\g _

k FLUX WELDS 8  %

Y 5

05 -

\ -

M \

04 - -

e N___________.

8 2 03 - -

02 CRACK GROWTH AFTER .

18 MONTHS OF OPERATION NO CREDIT FOR IHSI O

1 1 I i i i i l 1 00 01 02 03 04 05 06 07 08 09 10 NON-DIMENSIONAL LENGTH - LI(2*r*R)

SiO6219 Figure B.4 Flaw Acceptance Diagram for Weld 10 IA-7 No Credit for IHSI O

B-10

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

i e

i

?

APPLIED STRESS FOR WELD 10-IA-7 I

tlEtlBftANE_ STRESS:

Pressure = 6.B-ksi

{

Thermal Expansion =10.7 ksi ,

[

. Dead Weight  := 0.2 ksi

Shrinkage = 0.0 kai i f~ "

BEN. DING _ STRESS:

i No Residual Stress  ;

e' i

I 4

4 k

i-I.

S t

5 0

4 5

2 t <

B-Il

10 i i i a s i i 09 - -

lWB 3642 ALLOWABLE 08 - 2'3 CODE ALLOWABLE _

GENERIC LETTE A 84-11 REOuiREMENT

, 07 - -

2 l PROPOSED CODE I og - . _ _____..- CRITERIA FOR _

E FLUX WELDS E \

f 9

05 -

\ ___ ___g E

y 04 - -

5 2

O z 03 -

CR ACK GROWTH IN 18 MONTHS OF OPERATION O2 -

NO CREDIT FOR lHSI

• 21% INITIAL FLAW DEPTH 01 - -

t i i f i i l l 1 00 01 02 03 04 05 06 07 08 09 to NON DIMENSIONAL LENGTH - Li(2* r*R) l S'002 20 Figure B 5 Flaw Acceptance Diagram for Weld 2 AS 8 l

i No Credit for IHSI Assuming Average flaw Depth l

l 1

I i

I e

I 1

B-12 i

I W-

10 i i i i i i i i  :

09 - -

IWB-3642 ALLOWABLE 08 - 2/3 CODE ALLOWABLE GENE AIC LETTER 8411 AEQUIREVENT r 07 - -

Q l PROPOSED CODE I 06 - = =======- CRITERIA FOR -

5 FLUX WELDS E o\

a 05 -

z CAACK GROWTH IN

$ 04 -

() 18 MONTHS OF -

5 OPERATION

$ i NO CREDIT FOA INSI 03 -

40% INITIAL FLAW DEPTH

~

02 - -

01 - -

1 i f i f I i i 1 00 01 02 03 04 05 06 07 08 09 10 NON DIMENSIONAL LENGTH - L/(2'v'R; Sios; t' Figu' B 6 Flaw Acceptance Diagram for hvid 2-AS 8 No Credit for IHSI-Assuming Maximum Flaw Depth O

B-13

APPLIED STRESS FOR WELD 2-AS-S (1EMBR_ANE,_STJESS:

Pressure = 6.5 kai Thermal Expansion = 1.0 kai Dead Weight = 0.4 kai Shrinkage = 0.1 kai SE_NDING_SI!iESS:

No Residual Stress a

l B.14

10 , , , , , , , , ,

09 - -

IWB 3642 AL BLE 08 -

2/3 CODE ALLOWABLE GENERIC LETTER 8411 AEQUIREMENT k 07 -

1 I PROPOSED CODE I 06 CRITERIA FOR -

d -=======-\ \ FLUX WELDS 05 -

g_ _ _ _ _ _ _ _ -

5 04 - -

03 - -

i ,

02 -

4 > CRACK GROWTH IN 18 MONTHS OF OPERATION M3 CR OIT FDR IHS1 01 -

1 I i i i i i l i 00 01 02 03 04 OS 06 07 08 09 to g

NON DIMENSIONAL LENGTH - LI(2* s'R) s.oes n figure B 7 flaw Acceptance Diagram for %Id 2AD 14 No Credit for IHSI

(

l * ,

n-15 l

APPLIED STRESS FOR WELD 2-AD-14 MEMBRANE _ STRESS:

Pressure = 6.3 kai Thermal Expansion = 0.9 kai Dead Weight = 0.7 kui Shrinkage = 0.7 ksi BENDING _ STRESS:

No Residual Stress O

B-16

10 , , , , , ,

i i ,

09 -

IWB-3642 ALLOWABLE 08 -

2/3 CODE ALLOWABLE -

GENE AIC LETTER 8411 g REQUIREMENT 4 07 -

I z PROPOSED CODE g 0. .--_____

_s graan;oa s a \

z 05 -

\_ - _ _ - - .;;

5 o4 -

03 -

n -

CRACK GROWTH IN 02 -

O to MONTHS OF OPERATION

• NO C AEDIT FOR IMSI 01 - -

t i i f f I I i i *

, 00 01 02 03 04 05 06 07 08 09 10 NON DIMENSIONAL LENGTH - LI(2* e*R)

$1042 23 figure 88 Flaw Acceptance Diagram for Wold 2 BHC 4 No Credit for IHSI O

B-17

~ - , - - . - - - . . -,

APPLIED STRESS FOR WELD 2-BHC-4 t'IEtlBR ANE_ST,RESS :

Pressure = 4.6 kai Thermal Expansion = 4.2 kai Dead Weight = 2.3 kai Shrinkage = 0.4 ksi kENDING_ STRESS:

No Residual Stress i

?

u B-18 i

1 l

t

10 i i s i s s i i 09 -

lWB-52 -

ALLOWABLE 08 - 2/3 CODE ALLOWABLE -

GENERIC LETTER 8411 REQUIREMENT 07 - -

PROPOSED CODE i CRITERIA FOR FLUX WELDS

{ 06 - -------

8 g

w 05 -

CRACK GROWTH IN \______ ..

18 MONTHS OF OPERATION

$ WITH LARGE DIAMETER PIPE y 04 _ WELD RESIDUAL STRESS -

5 03 - -

02 -qb -

01 1 I i i i e 1 i 1 00 01 02 03 04 05 06 07 08 09 10 NON. DIMENSIONAL LENGTH - L/(2','R) 65082 24 Figure B.9 Flaw Acceptance Diagram for Weld 10 IB 3 Large Diameter Pope Weld Residual Stress e

B-19

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

APPLIED STRESS FOR WELD 10-IS-3

!!.E!19.RANE_ST_RESS :

i- Pressure = 5.2 ksi

/ Thermal Expansion = 6.7 kai Dead Weight = 0.1 kai

. Shrinkage = 1.7 kai BENDING _ STRESS:

Large Diameter Pipe Weld Residual Stress i

• A, 4

b i

9 t

I .

i 1 J f

I" l

l 8 20 t'

/

f' l

l

's.

'.t' s c, b

i, 10 e i i i e i e s i 09 - -

'.*- IWB 3642 ALLOWABLE 08 - 2/3 CODE ALLOWABLE ~

GENERIC LETTER 84-11 i

REQUIREMENT g 07 -

2 06 - = == = PROPOSED CODE E =====\ CRITERIA FOR o \ FLUX WELDS

\

j s

5 04 -

5 2

O Z 03 - -

02 - -

' CRACK GROWTH IN 18 MONTHS OF OPERATION DIT FOR IHSI 01 - 4> _

o f f 8 1 1 I I I l 00 01 02 03' 04 05 06 07 08 09 10 NON-DIMENSIONAL LENGTH - LI(2* r*R)

S1082 25 Figure B.10 Flaw Acceptance Diagram for Weld 10-18-6 No Credit for IHS:

\

G B-21 1

r

APPLIED STRESS FOR WELD 10-IB-6 MEMBR ANE_S.T.RE SS :

Pressure = 6.2 ksi Thermal E::pansion = 5.1 ksi Dead Weight = 0.4 ksi Shrinkage = 2.7 ksi BENDING _ STRESS:

No Residual Stress 1

i

! B-22 l

10 i I I i i i i i 1 09 -

lWB 3642 ALLOWABLE 08 - 2/3 CODE ALLOWABLE _

GENERIC LETTER 8411 REQUIREMENT g 07 - -

2 PROPOSED CODE I CRITERIA FOR I 06 - " FLUX WELDS -

E

"""""A E! N

.2 y 05 -

N 9

M N

N 04 - ~ - ~ ~ ~ ~ ~ ~ ~ ~ ~-

5 il 03 -

CRACK GROWTH IN 18 MONTHS OF OPERATION 02 - NO CREDIT FOR IHSt -

01 - il -

t i i i f i 1 1 I 00 01 02 03 04 05 06 07 08 09 10 c

NON-DIMENSION AL LENGTH - L/(2* r*R) pos2 2e Figure B.11 Flaw Acceptance Diagram for Weld 10-18 7 No Credit for IHSI O

B-23

APPLIED STRESS FOR WELD 10-IB-7 ME.MBRANE_ STRESS:

Pressure = 6.5 ksi Thermal Expansion =10.4 ksi Dead Weight = 0.2 ksi Shrinkage = 4.2 ksi BENDING _STf<ESS:

No Residual Stress 4

B-24 -

10 i i i 6 6 I I I I 09 - -

IWB-3642 08 - ~

2/3 CODE ALLOWABLE GENERIC LETTER 8411 REQUIREMENT 07 - -

E I

( 06 --- ---

CA TER A OR

~

$ FLUX WELDS 05 -

a "

$ 04 -

CRACK GROWTH AFTER -

5 18 MONTHS OF OPERATION

$ WITH LARGE DIAMETER PIPE 2 03 - WELD RESIDUAL STRESS gp _

02 - -

01 -

1 l f i t t t t i g

00 01 02 03 04 05 06 07 08 09 10 NON-DIMENSIONAL LENGTH - L/(2*r*R) 9 082 s Figure B 12 Flaw Acceptance Diagram for Weld 2-BD-11 Large Diameter Pipe Weld Residual Stress O

e B-25

APPLIED STRESS FOR WELD 2-BD-11 met [BR.@NE_STJiESS.:

Pressure = 7fC ksi 1

Thermal Expansion = 0.6 ksi Dead Weight = 0.3 ksi Shrinkage = 1.3 ksi BENDING _ STRESS:

Large Diameter Pipe Weld Residual Stress O-B-26

l 10 i i a i i i i I 09 -

lWB-3642 08 -

ALLOWABLE -

2/3 CODE ALLOWABLE GENERIC LETTER 8411 g 07 - -

2 I PROPOSED CODE f 06 ----- CRITERIA FOR FLUX WELDS 05 - ------

O 04 - ~

h CRACK GROWTH AFTER i 18 MONTHS OF OPERATION

@ WITH LARGE DIAMETER PIPE 03 -

WELD RESIDUAL STRESS

~

28% INITIAL FLAW DEPTH 02 - II -

01 -

I t i i 1 I I I I o 00 01 02 03 04 0.5 06 07 08 09 1.0 NON. DIMENSIONAL LENGTH - Ll(2* 'R) 51062-6 Figure B.13 Flaw Acceptance Diagram for Weld 2-BD42 Large Diameter Pipe Weid Residual Stress Assuming Average Flaw Depth O

B-27

10 i i i i i i i 1 09 - -

IWB-3642 08 -

ALLOWABLE -

2/3 CODE ALLOWABLE GENERIC LETTER 84-11 REQUIREMENT _

t g PROPOSED CODE I 06 -------- CRITERIA FOR -

E

\ FLUX WELDS E

i 2

Os -

--______s il n 2 g 04 -

CRACK GROWTH AFTER 5 18 MONTHS OF OPERATION 2 WITH LARGE DIAMETER PIPE O 03 -

4 > WELD RESIDUAL STRESS -

30% INITIAL FLAW DEDTH 02 - -

01 - -

! t I t I f I l 00 01 02 03 04 05 06 07 08 09 10 NON-DIMENSIONAL LENGTH - LI(2* r*R) 51062 ?

Figure B 14 Flaw Acceptance Diagram for Weld 2-BD-12 Large Diameter Pipe Weld Residual Stress Assuming Maximum Flaw Depth O

B-28

APPLIED STRESS FOR WELD 2-BD-12 MEM_BR A.NE_ SIRE SS :

Pressure = B.O kai Thermal E>:pansi on = 0. 7 ksi

. Dead Weight = 0.3 ksi Shrinkage = 1.0 ksi B_END I NG_ST_RESS :

i Large Diameter Pipe Weld Residual Stress l

i B-29

APPENDIX C Weld Overlay Designs This appendix contains the details of the Peach Bottom Unit 3 veld overlay designs for the flaws that required repair.

C.1 Process The weld overlay designs consist of a continuous 360' band of weld metal applied to the outside surface of the pipe directly above the crack indication. The overlay weld metal is Type 308L stainless steel containing low carbon and high ferrite. This material is resistant to Intergranular Stress Corrosion Cracking (IGSCC).

C.2 Assumptions Due to the conservative assumption of a through wall fully circumferential flaw, the weld overlay thickness is independent of flaw size. Therefore, uncertainty in flaw sizing does not influence the weld overlay design.

The overlay is designed to provide full structural reinforcement while maintaining the ASME Code intended safety margins. This design has been termed the Type I full structural overlay. Also, no credit is taken for the beneficial compressive residual stress induced by the heat sink (water cooled) weld overlay process that would reduce crack growth through the thickness.

C.3 Results The specific overlay design for each weld was based on consideration of such factors as:

e Weld crown geometry, e proximity to other welds, valves, and carbon steel pipes, and e ultrasonic testing requirements for better in-service inspection.

C-1

In accot dance with the requirements of the NRC Ceneric Letter 84-11, the overlay design thickness includes material deposited after the first layer (or layers) that pass liquid penetrant examination requirements.

The weld overlay designs provide conservative safety margins for a typical Type I full structural overlay and are acceptable for at least 18 months of continued operation.

CONTENTS FIGURE TITLE C.1 Weld Overlay Design for 2-AHJ-4 C.2 Weld Overlay Design for 10-0-1A C.3 Weld Overlay Design for 10-0-1B C.4 Weld Overlay Design for 10-0-02 C.5 Weld Overlay Design for 2-AS-02 C.6 Weld Overlay Design for 2-AS-03 C.7 Weld Overlay Design for 2-AS-04 C.8 Weld Overlay Design for 2-AS-07 C.9 Weld Overlay Design for 2-AS-10 C.10 Weld Overlay Design for 2-AS-11 C.ll Weld overlay Design for 2-BRA-4 C.12 Weld Overlay Design for 2-BHB-4 C.13 Weld Overlay Design for 10-IB-4

.. C.14 Weld Overlay Design for 10-IB-11 C.15 Weld Overlay Design for 2-BS-02 C.16 Weld Overlay Design for 2-BS-03 C.17 Weld Overlay Design for 2-BS-08 C.18 Weld Overlay Design for 2-BS-09 C-2

• WELD ID: PB3 WELD 2-AHJ-4 *

• PIPE THICKNESS = 0.80 INCH *

• PIPE DIAMETER = 12.75 INCH *

• PRIMARY LOADS (STRESS): *

• PRESSURE = 5 18 KSI *

• DEAD WEIGHT = 2 20 KSI *

• SEISMIC = 0.80 KSI *

• PB (KSI) .2512B _EHIEB *

• ___I_ PM --------------

SM 3SM *

• WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g __________________________________________________________ g

• 0.245 0.766 4.118 2.297 15.147 0.380 0.380 *

• PRIMARY STRESS RATIOS (ADJUSTED): *

• PM/SM = 0.244 *

• (PMfPB)/SM = 0.380 *

• MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.245 INCH *

• MINIMUM REQUIRED WELD DVERLAY WIOTH = 2.3 INCH *

• t**S88888888888888*S***$$$$$5*888888***$$$$$***$***$***$**8******$**

C-3

$$$$$ttttttttttttttttttttttttttttttttttsststttttttttttttttttttttttttt 3

WELD ID: PB3 WELD 10-0-1A t t t t t

• PIPE THICKNESS = 0.92 INCH $

$ PIPE DIAMETER = 20.00 INCH $

• PRIMARY LOADS (STRESS):

• 8 PRESSURE = 6.40 KSI 3

$ DEAD WEIGHT = 0.43 KSI *

• SEISMIC = 1.11 KSI $

$ PB (KSI) _EMIEB _EdfEB *

• ___I_ PM --------------

SM 3SM $

• WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC) $

g __________________________________________________________ g 8 3 8 0.255 0.763 5.008 1.175 13.749 0.366 0.370 3 8 PRIMARY STRESS RATIOS (ADJUSTED): 8

• PM/SM = 0 296 8

$ (PMtPB)/SM = 0.366 8

. 8 8

• 8 8 MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.255 DEH $

$ MINIMUN REQUIRED WELD OVERLAY WIDTH = 2.9 INCH $

3 8

$$$$85$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$t$$$$$$$$$$$$$$$$$$$$$$$$$$$

C-4

1 888888888888888*****t*************************************************

• WELD ID: PB3 WELD 10-0-1B

• PIPE THICKNESS = 0.76 INCH

• PIPE DIAMETER = 20.00 INCH

• PRIMARY LOADS (STRESS):

= 6.91 KSI *

• PRESSURE DEAD WEIGHT = 0.46 KSI

• SEISMIC = 1 19 KSI PB (KSI) _EufEB _EdiEB

---

SH 3SM

• _..I_ PM (KSI) ACTUAL CALC (ACTUAL) (CALC)

• WOT T+WOT g g ___........__..__..__.....___....___......__________..____

• 0.391

• 0.255 0.749 5 304 1.235 14.533 0 387

• 8

• PRIMARY STRESS RATIOS (ADJUSTED):

• PM/SM = 0.314 (PMtPB)/SM = 0.387 *

• MINIMUM REQUIRED WELD OVERLAY THICKNESS = 0.255 INCH *

• MINIMUM REQUIRED WELD OVERLAY WIDTH

= 2.8 INCH 8

• $$$88$$$$$$$$$$$$$$$$$$$$t88888888tstsststttstattstt$$t8888888*tS***

C.5

$$$$$$ststttsststststtttttttttttttttttttssstststSttttttttttttttttttts

• 8

• WELD ID: PB3 WELD 10-0-02 *

• PIPE THICKNESS = 0 80 INCH *

• PIPE DIAMETER = 20.00 INCH t

• PRIMARY LOADS (STRESS): *

• PRESSURE = 6.56 KS! $

$ DEAD WEIGHT = 0.40 KSI

• 8 SEISMIC = 1.10 KS!

• s t t *

$ PB (KSI) _EBiEB _EBiEB *

• ___I_ PM --------------

SM 3SM

• 3 WOT T+WOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g ____._______ ______._____..._____________________...._____ g

• 0.255 0.758 5.103 1.137 14.001 0.369 0.377

• 1 *

• PRIMARY STRESS RATIOS (ADJUSTED): *

• PN/SM = 0 302 *

• (PMfPB)/SM = 0 369 *

• MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.255 INCH *

• MINIMUM REQUIRED WELD OVERLAY WIDTH = 2.8 INCH *

• $$$$$$$$$$$35$$$$$$$3t$$$$$$$$$tttttttttttttttttttttttttttttttttttts C_6

l

• tsttttttttttttsttttttttttttttttttttttttttttttttttt*tttttttttttttttts

• WELD ID: PB3 WELD 2-AS-2 3

$ t

• PIPE THICKNESS = 1.15 INCH *

• PIPE DIAMETER = 28.00 INCH t 5 PRIMARY LOADS (STRESS): *

• PRESSURE = 6.39 KSI *

• DEAD WEIGHT = 0.91 KSI t

• SEISMIC = 1.60 KSI *

• t

• PB (KSI) 2512B EdiEB *

$ -- I. PM - ======- --

SH 3SM *

• WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g ---------------------------------------------------------- g

• 0.390 0.747 4.906 1.874 15.464 0.401 0.402

• 8

• PRIMARY STRESS RATIOS (ADJUSTED): *

$ PM/SM = 0.290 8

• (PMfPB)/SM = 0.401 *

$ MINIMUM REQUIRED WELD OVERLAY THICKNESS = 0.390 INCH *

• MINIMUM REQUIRED WELD DVERLAY WIDTH = 4.0 INCH

• 8 *

$$$$tttttttttttttttttttttts*ttttttttttttttttttttttttttttttttt*tstttts C-7

$tttststsettttsstsetttttttttttttttttttttttttttttttttttttttttttstsstst 8 $

$ WELD ID: PB3 WELD 2-AS-3 *

• t t t t PIPE THICKNESS = 1.15 INCH t

• PIPE DIAMETER = 28.00 INCH t 8 8 8 PRIMARY LOADS (STRESS): $

$ PRESSURE = 6.39 KSI $

$ DEAD WEIGHT = 1.22 KSI $

$ SEISMIC = 1.19 KSI $

• t t PB (KSI) _EsiEB _EMIEB C

$ ___I_ PM ---------- -

SM 3SM $

$ WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• 3 __________________________________________________________ g 8 8 8 0.390 0.747 4.906 1.800 15.464 0.397 0.402 $

$ PRIMARY STRESS RATIOS (ADJUSTED): $

$ PM/SM = 0.290 $

$ (PMtPB)/SM = 0.397 $

$ MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.390 INCH $

$ MINIMUM REQUIRED WELD OVERLAY WIDTH = 4.0 INCH $

$$$$$$888888888888888$$$$$$$$58$$$$$$$$$$$$$$t588$$$$$$$$$$$$$$$$$$$$

C_8

• tstttttttsstststsstttttttttttttttttttttttttttttttttttttttttttttttttt t t t t t WELD ID: PB3 WELD 2-AS-4 $

3 PIPE THICKNESS = 1.13 INCH *

$ PIPE DIAMETER = 28.00 INCH *

• PRIMARY LOADS (STRESS): *

$ PRESSURE = 6.53 KSI t

• DEAD WEIGHT = 1.49 KSI $

• SEISMIC = 1.25 KSI $

$ PB (KSI) _EufEB _EMIEB $

$ ___I_ PM --------------

SM 3SM

• 3 WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• 3 ____________________________________,_____________________ g

• 0.400 0.738 4.957 2.021 16.220 0.413 0.418 $

• 3

$ PRIMARY STRESS RATIOS (ADJUSTED): *

$ PM/SM = 0.293 3

$ (PMtPB)/SM = 0.413 $

$ MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.400 INCH t 3 MINIMUM REQUIRED WELD OVERLAY WIDTH = 4.0 INCH $

C 8

$$$$$$$$$$$$$$$$$$$$$5t$$$$5$$$$$$$$t385$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

C-9

$$$tttttttttttttttttststtttttttttttttsstststttttttttttttttttttttttttt t t t t t WELD ID: PB3 WELD 2-AS-7 3 3 $

$ PIPE THICKNESS = 1.30 INCH t

• PIPE DIAMETER = 28.00 INCH t t t t PRIMARY LOADS (STRESS): $

• PRESSURE = 5.65 KSI *

• DEAD WEIGHT = 0.70 KSI

• 3 SEISMIC = 0.60 KSI

• t *

• t

• t t PP (KSI) _EdfEB _EHIEB 3

$ ___I. PM --------------

SM 3SM

• t WOT T+WOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g __________________________________- -_____________,__

g 3 3

• 0.355 0.785 4.554 1.021 12.425 0.330 0.335 t t t t 3 s PRIMARY STRESS RATIOS (ADJUSTED)I $

$ PM/SM = 0.269 8

$ (PMfPB)/SM = 0.330 $

• t t *

$ MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.355 INCH t

• MINIMUM REQUIRED WELD OVERLAY WIDTH = 4.3 INCH t t *

$$$$$$$$$$$$$$$$$$$$$$$$$$$381$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

C-10

$$$$$$$$$$8t$$$$$$$$$$$$$$$$$$$$$38t$$$$$$$$$$$$$$$$$$$$$$$$$tt$$$$$$ $

4 WELD ID: PB3 WELD 2-AS-10 PIPE THICKNESS = 1 14 INCH

• t t PIPE DIAMETER = 28.00 INCH t

t t PRIMARY LOADS (STRESS):

= 6.46 KSI t

• PRESSURE t DEAD WEIGHT = 0.61 KSI

= 1.60 KSI $

t SEISMIC PB (KSI) EMIEB EBiEB $

===- ------- SM 3SM t

$ -- I . PM (ACTUAL) (CALC) $

• WOT T+WOT (KSI) ACTUAL CALC g

g ----------------------------------------------------------

0.750 4.973 1.657 15.063 0.392 0.395

• 3 0.380 3 3

• 3

$ PRIMARY STRESS RATIOS (ADJUSTED):

= 0.294 8

$ PM/SN (PMtPB)/SM = 0.392

• 8 8 MINIMUM REQUIRED WELD OVERLAY THICKNESS = 0.380 INCH

• MINIMUM REQUIRED WELD DVERLAY WIDTH

= 4.0 INCH t t

t t

t tttttttttttttttsststststatttttttttttttttttttttsststStttttttttttttttts C-11

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

38888tt$$$$$$$$$t$$$$$$$$$$$$$$$tttttttttttttttttttttttttttttttttttts

• 8 8 WELD ID: PB3 WELD 2-AS-11 1

$ PIPE THICKNESS = 1.30 INCH *

• PIPE DIAMETER = 28.00 INCH *

• PRIMARY LOADS (STRESS): *

$ PRESSURE = 5.65 KSI 2

• DEAD WEIGHT = 0.68 KSI *

• SEISMIC = 1.54 KSI t

• t t PB (KSI) _EHiEB _EMIEB t

• ___I_ PM --------------

SM 3SM t

• WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g __________________________________________________________ g 8 *

• 0.390 0.769 4 470 1.708 14.142 0.366 0.367 8

$ PRIMARY STRESS RATIOS (ADJUSTED): *

• PM/SM = 0.265

• 8 (PMtPB)/SM = 0.366

• t *

• MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0 390 INCH *

• NINIMUM REQUIRED WELD DVERLAY WIOTH = 4.3 INCH t t *

$$$$$sttttttttsststststtttttstsstsstSttttttttttttttttttttttst*tttttts C-12

$$$$$$$$$$$$$$tt3888t$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$33888t$tstst*st t

• 8 8 8 WELD ID: PB3 WELD 2-BHA-4 *

• PIPE THICKNESS = 0.80 INCH 3 8 PIPE DIAMETER = 12.00 INCH $

• t t PRIMARY LOADS (STRESS): $

$ PRESSURE = 4.87 KSI $

• DEAD WEIGHT = 0 60 KSI C t SEISMIC = 1 10 KSI $

• PB (KSI) _EdiEB _EBIEB 3 3 ___I_ PM -------------- SH 3SM $

$ WOT T+WOT (KSI' ACTUAL CALC (ACTUAL) (CALC) t g _________________________.________________________________ g 8 3

$ 0.205 0.796 4.013 1.353 12.435 0.318 0.324 8

$ PRIMARY STRESS RATIOS (ADJUSTED): $

$ PM/SM = 0.237 8

• (PMfPB)/SM = 0.318 *

• MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.205 INCH t t MINIMUM REQUIRED WELD OVERLAY WIDTH = 2.2 INCH t t t t t

$$$$$$$$$$$$$$$$$$$$t88888888888t$$$$$$$$$$$$$$$$$$$$$$$$$$$$$tststtt C-13

$$$$$$$$$$$$$$$$$$$$388$t888t388tstttttttttttststtttttstsststststttts

$ WELD ID: PB3 WELD 2-BHB-4 8 8 8 8 $

8 PIPE THICKNESS = 0 82 INCH t t PIPE DIAMETER = 12 00 INCH $

5 8

• PRIMARY LOADS (STRESS): 5 8 PRESSURE = 4.73 KSI t t DEAD WEIGHT = 0.85 KSI $

$ SEISMIC = 0.70 KSI $

$ PP (KSI) .25f29 .EHIEB 3

$ __.I. PM --------------

SH 3SM $

$ WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC) 8 g ...___.________.._______..................._____..___..... t t t t 0.200 0.005 3.932 1.248 11.733 0.306 0.309 8 8 $

$ PRIMARY STRESS RATIOS (ADJUSTED): $

$ PM/SM = 0 233 8 8 (PMf?B)/SM = 0 306 8

. $ t t t 8 MINIMUM REQUIRED WELD OVERLAY THICKNESS = 0.200 INCH t t MINIMUM REQUIRED WELD DVERLAY WIDTH = 2.2 INCH $

$$stttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttsssts C-14

$$$$$tststtsststsstttttttttttttttttttttttttttttttt*tsttttttttttttttts 8 WELD ID: PB3 WELD 10-IB-4 *

• PIPE THICKNESS = 1 24 INCH *

• PIPE DIAMETER = 24.00 INCH *

• PRIMARY LOADS (STRESS): *

• PRESSURE = 6.29 KSI *

• DEAD WEIGHT = 0.22 KSI $

• SEISHIC = 1.02 KSI *

• PB (KSI) .EHAEB _EHiEP *

• .._I_ PM --------------

SM 3SM 8

• WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g _________._______________.... ......__...........__....... g

• 0.370 0.770 4.994 0.955 13.067 0.352 0.356 *

• PRIMARY STRESS RATIOS (ADJUSTED):

• 8 PM/SM = 0 296 *

• (PMtPB)/SM = 0.352 *

• MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.370 INCH *

• MINIMUM REQUIRED WELD OVERLAY WIOTH = 3.9 INCH *

• ttttttttttttttttttttttttttttttttttttttttttsstitttttttttttttttttttttt C-IS

$$$$$$$$$$$$t3838t$$$$$$$$388t$$$$tttttttttttttttttttttttttttttttttts t *

• t

• WELD ID: PB3 WELD 10-IB-11 *

$ PIPE THICKNESS = 1.50 INCH $

$ PIPE DIAMETER = 24.00 INCH $

• PRIMARY LOADS (STRESS): 5 8 PRESSURE = 5.20 KS! *

• DEAD WEIGHT = 0.07 KSI *

$ SEISMIC = 0.53 KSI *

• PB (KSI) _EBfCB _EBiEB *

• ___I_ PM -------------- SH 3SM

• 8 WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g __________________________________________________________ g

• 0.350 0.811 4.339 0.504 10.375 0.287 0.290

• 8

• t *

• PRIMARY STRESS RATIOS (ADJUSTED): *

$ PM/SM = 0.257 $

$ (PMtPB)/SM = 0.287

• 8 $

$ MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.350 INCH t

• MINIMUM REQUIRED WELD OVERLAY WIDTH = 4.2 INCH *

't 8 888$$$$$$$$$$$$$$$$$$$$$$8$$$$$$$$$$$38t8888$$$$$$$$$$$$$$$$$$$$$$$$$

C-16

388888888888888888888888888$$$88ttttststtttttttttttttttttstetttttttts

$ WELD ID: PB3 WELD 2-BS-2 *

• PIPE THICKNESS = 1.20 INCH *

• PIPE DIAMETER = 28.00 INCH $

$ PRIMARY LOADS (STRESS): $

• PRESSURE = 6.12 KSI *

• DEAD WEIGHT = 0.44 KSI *

• SEISMIC = 0.79 KSI 3 3 1

• PB (KSI) _EdiEB .25129 8 8 ___I_ PM --------------

SM 3SM *

$ WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g __________ ____.___.....__........._______________________ g

• 0.345 0.777 4.875 0.955 12.666 0.345 0.346 8

$ PRIMARY STRESS RATIOS (ADJUSTED): *

• PM/SM = 0.288 *

• (PMfPB)/SM = 0.345 *

$ MINIMUM REQUIRED WELD OVERLAY THICKNESS = 0.345 INCH *

• MINIMUM REQUIRED WELD OVERLAY WIDTH = 4.1 INCH *

• 3

• S8888888888888835ttttttttttttsttttttttttttttttttttttttttttttttttttts C-17 s

38888*stast**t8888888888****888********t8888******t********$$*88t****

• WELD ID: PB3 WELD 2-BS-3 *

• PIPE THICKNESS = 1.15 INCH *

• PIPE DIAMETER = 28.00 INCH *

• PRIMARY LOADS (STRESS): *

• PRESSURE = 6.39 KSI *

• DEAD WEIGHT = 0.45 hSI *

• SEISMIC = 0.68 KSI *

• PB (KSI) _EBiEP _EdlEB *

• ___I_ PM --------------

SH 3SM * .

• WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• g __________________________________________________________ g

• 8

• 0.340 0.772 5.053 0.872 12.799 0.351 0.352 *

• PRIMARY STRESS RATIOS (ADJUSTED): *

• PM/SM = 0.299 *

• (PMtPB)/SM = 0.351 *

• 8

• MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.340 INCH *

• MINIMUM REQUIRED WELD OVERLAY WIOTH = 4.0 INCH *

• $$$$$$$$$$$$$$$38888$$$t$$$$$*t88888*tt***$$$$$$$$$$$$$t*t*8*ttt*S*t C_18

=

9 L

, $$$8$$88888888835t888$$58888888888888$$$$$$$$$$$$$$t88888888$$$$$$$$$

t t t t t WELD ID: PB3 WELD 2-BS-8 8

$ PIPE THICKNESS = 1.14 INCH $

8 PIPE DIAMETER = 28.15 INCH t t 8 8 PRIMARY LOADS (STRESS): $

t PRESSURE = 6.49 KSI $

$ DEAD WEIGHT = 0.33 KSI $

• SEISMIC = 0.81 KSI $

$ PB (KSI) _EsiEB _EHiEB C 3 ___I. PM --===---- ----

SM 3SM $

$ WOT T+WOT (KSI) ACTUAL CALC (ACTUAL) (CALC) $

g __________________________________________________________ g 8 8 8 0.345 0.767 5.104 0.875 13.130 0.354 0.360 $

8 $

$ PRIMARY STRESS RATIOS (ADJUSTED): $

$ PM/SM = 0.302 $

$ (PMtPB)/SM = 0.354 8 o 8 8

$ MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.345 INCH $

$ MINIMUM REQUIRED WELD DVERLAY WIOTH = 4.0 INCH $

$ t

$$$$$$$$$$888$$$$$$$$$$$t8$$$$$$$$$$$$$$$$$$888888888$$$tt$$$$$$$$$$$

C-19

k y

$$$$$$$$t88t$$t58$$$$$$$$$$$$$$t3sttttttttttttttttttttttt*tttttt*tttt

• ~

s *

• WELD ID: PB3 WELD 2-BS-9

• 8 8

$ PIPE THICKNESS = 1.15 INCH t

• PIPE DIMETER = 28.00 INCH *

,I

• PRIMARY LOADS (STRESS): *

$ PRESSURE = 7.91 KSI *

$ DEAD WEIGHT = 0.37 KSI *

$ SEISMIC = 1.34 KSI

• 8

• 8 8 t PB (KSI) _EnfEB .2512B

• 8 , ___I_ PM --------------

SM 3SM $

• WOT TfWOT (KSI) ACTUAL CALC (ACTUAL) (CALC)

• p,,' __________________________________________________________ g

.R

• s' O.435 0.726 5.920 1.241 15.590 0.424 0.424 *

• PRIMARY STRESS RATIOS (ADJUSTED): *

(! ,

• PM/SM = 0.350 $

8 (PMiPB)/SM = 0.424 8

\ .* * '

• MINIMUM REQUIRED WELD DVERLAY THICKNESS = 0.435 INCH $

. ,

• MINIMUM REQUIRED WELD DVERLAY WIDTH = 4.0 INCH

• s * *

• $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$t88t$$$$$$$$$$$$$$$$$$$$$$$8*$$88888 C-20

APPENDIX D As-Built Shrinkage Stresses This appendix contains the results of the final as-built shrinkage -

analysis.

D.1 Method and Assumptions The' analysis was performed using the piping analysis code, PISYS. The weld overlay shrinkage values are based on the measured shrinkages shown in Table D.1.

D.2 Results (To be included when shrinkage analysis is completed)

'o f

D-1