ML20214J253

Rev 2 to Design Rept for Recirculation Sys Weld Overlay Repairs at Brunswick Steam Electric Plant,Unit 1

ML20214J253
Person / Time
Site:	Brunswick
Issue date:	05/20/1987
From:	Cofie N, Froehlich C, Kleinsmith M CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML20214J244	List: ML20214J242 ML20214J253
References
CPL040.0102, CPL40.0102, NUDOCS 8705270709
Download: ML20214J253 (51)

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{{#Wiki_filter:NUTECH CONTROLLED COPY XCP-40-102 Revision 2 May 1987 CPLO40.0102 I DESIGN REPORT FOR RECIRCULATION SYSTEM WELD OVERLAY REPAIRS AT BRUNSWICK STEAM ELECTRIC PLANT UNIT 1 I Prepared for: Carolina Power and Light Company I Prepared by: l NUTECH Engineers u San Jose, California l' Prepared by: Reviewed by: 41/e #rdt M g M. E. Kleinsmith N. G. Cofie, Ph.D. Consultant I Project Engineer Reviewed and Approved by: Issued by: A Yos[ida,P.E. 3 C. H. Froehlich, P.E. D. K. E Engineering nanager Project Manager Date: S/M//7 g p=m==;ir nutach

REVISION CONTROL SHEET TITLE: Design Report for Recirculation DOCUMENT FILE NUMSEM: CPLO40.0102 System Weld Overlay Repairs at Brunswick Steam Electric Plant Unit 1 I N. G. Cofie. PH.D./Princioal Consultant MN NAME/ TITLE NTIALS C. H. Froehlich. P.E./ Staff Encineer NAME/ TITLE NTIALS M. E. Kleinsmith/ Consultant I NNI NAME/ TITLE NTIALS NAME/ TITLE NTIALS A (S) CHECK OATE CHECM SY ATE EM8 %f/s-/y-s7 esc @+/s7 cwy M*/a7 1-v o Final Issue 1-15 0 l A.0 - 0 A.2 B.O - 0 B.3 C.0 - 0 C.3 i l D.0 - O D.2 I E.0 - 0 E.1 y V n [~ A1c/s-/v.g7 ^*c #v/s7 cads s/4/g N(7/ /fet Ns.c r/9/p c1dif Sh9/r7 General Revision 11, 2 1 h 7 - 14 1 17 1 E 0-E.2 1 I F.0,F.3 1 G.0-G.4 1 I f Y y NgWg.fy,g7 N6C S/$/Q cyg gpgg H.0-H.1 1 1 WdM*J&d? N4c 4"/a.o[g7 OME h I r n 11

I CERTIFICATION BY REGISTERED PROFESSIONAL ENGINEER I I hereby certify that this document and the calculations con-tained herein were prepared under my direct supervision, or reviewed by me, and to the best of my knowledge.are correct and complete. I further certify that, to the best of my knowledge design margins required by the original Code of Construction have not been reduced as a result of the repairs addressed herein. I am a duly Registered Professional Engi-neer under the laws of the State of California and am competent to review this document. I I Certified by: I l ?* b ti.3*ll Y C. H. Froehlich, P.E. 5[ 4 / I Registered Professional Engineer State of California Registration No. C-27862 5-20-87 Date: lI l I I XCP-40-102 iii Revision 2 l (.

TABLE OF CONTENTS Page LIST OF FIGURES V

1.0 INTRODUCTION

1 2.0 REPAIR DESCRIPTION 4 3.0 DESIGN AND EVALUATION CRITERIA 7 3.1 Weld Overlay Repair Design Criteria 7 3.2 Flawed Pipe Evaluation Criteria 8 4.0 EVALUATION METHODS AND RESULTS 11 4.1 Weld Overlay Repair Design 11 4.2 Flawed Pipe Evaluation 12 5.0

SUMMARY

AND CONCLUSIONS 15

6.0 REFERENCES

16 APPENDIX A - Brunswick Unit 1 Pipe Geometry and Flaw A.0 Characterization I APPENDIX B - Weld Overlay Repairs - Design vs. As-Built B.O Overlay Dimensions APPENDIX C - Criteria for Weld Overlay Repair Design C.0 APPENDIX D - Evaluation of Weld Overlay Repairs D.0 APPENDIX E - Weld Overlay Repair Flaw Evaluation E.0 APPENDIX F - Weld Overlay Axial Shrinkages and F.0 Shrinkage Stresses APPENDIX G - Criteria for Flawed Pipe Evaluation G.0 APPENDIX H - Evaluation of Flawed Welds H.0 I XCP-40-102 iv Revision 2

I LIST OF FIGURES 1 Figure Title Page 1.0-1 Conceptual Drawing of Recirculation System 3 - I 4.2-1 Brunswick Unit 1 Recirculation System Piping Model 14 I I I I I

I

I

.I I I I XCP-40-102 y Revision 2 .I nutash

i i

1.0 INTRODUCTION

I As a result of intergranular stress corrosion cracking (IGSCC) identified during various refueling outages, weld overlay repairs have been applied to 36 welds in the Recirculation System at Carolina Power and Light Company's Brunswick Steam Electric Plant Unit 1 (Brunswick 1). All but three of the weld overlay repairs were built-up or newly applied during the 1987 refueling outage. Four of the weld overlay repairs were newly applied and surface finished during the 1987 outage. Twenty-nine repairs were built-up and thirty-two were surface finished. A summary of IGSCC flaws detected in the Brunswick 1 recirculation system is contained in Appendix A. The acceptability of a weld overlay repair is based on its ability to restore the original design safety margin to the weld. When completed, all thirty-six weld over-lay repairs met the requirements of Generic Letter 84-11 (Reference 1) and draft NUREG-0313 (Reference 2). The surface finishing of the weld overlay repairs allowed for more accurate ultrasonic (UT) inspection. All weld overlay repairs were applied to type 304 stainless steel piping. Figure 1.0-1 shows the location of each repair. I I XCP-40-102 1 Revision 2 I nutash l

I In addition, one pipe weld (Weld No. 28-A8), which was justified for continued operation without repair in a previous outage (Reference 3), was re-inspected during J this outage. The results of the inspection showed that the flaw had not grown. The location of this weld is also shown in Figure 1.0-1. The purpose of this report is to demonstrate that the original design margins of safety for the flawed welds at Brunswick 1 have not been degraded by the presence of IGSCC flaw indications or repairs. In addition, it will be demonstrated that existing weld overlay repairs are adequately sized to meet anticipated changes in regulatory requirements in Reference 2. I I E I I I XCP-40-102 2 Revision 2

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I I 2.0 REPAIR DESCRIPTION I Weld overlay repairs at Brunswick 1 fall into three categories:

1) Weld overlays from previous outages that were built-up to References 1 and 2 design requirements;

2) new References 1 and 2 overlays applied during the 1987 outager und 3) weld overlays from previous outages that were surface finished only.

Four new overlay repairs were applied during the 1987 refueling outage. They are at the following locations: 1) 4A1 2) 4B10 3) 4B1 4) 22-AM3 I The thirty-six flawed weldments have been repaired by increasing the pipe wall thickness with weld metal deposited 360 degrees around and to either side of the existing weld. The weld-deposited band over the welds provides, as a minimum, a wall thickness equal to that necessary to meet the weld overlay repair design requirements of References 1 and 2. I Even though draft NUREG-0313 (Reference 2) allows credit for the first overlay layer if its delta ferrite is at least 8.0 FN, the more stringent requirement of Generic Letter 84-11 (Reference 1) which allows no credit for j XCP-40-102 4 l Revision 2 I nutach

I I the first layer, even for delta ferrite of at least 8.0 FN, was used in the design of the thirty-six weld over-lay repairs at Brunswick 1. A favorable compressive residual stress distribution results from overlay application, which will tend to inhibit further crack initiation or growth. The deposited weld metal is type 308L, which is resistant to IGSCC propagation. Appendix B presents design and as-built information for the overlay repairs applied to Brunswick 1. I All weld overlay repairs were inspected using non-destructive examination techniques. These techniques consisted of the following: 1) Surface examination of the first weld overlay layer over the original pipe surface by the liquid penetrant examination technique in accordance with ASME Section XI. 2) Delta ferrite measurement of the first layer over the original pipe surface using a Severn gauge. I 3) Surface examination of the completed weld overlay by the liquid penetrant examination technique in accordance with ASME Section XI. I XCP-40-102 5 Revision 2 ll nutggb

I 1 4) Volumetric examination of the completed weld over-i lay by the ultrasonic examination technique in accordance with ASME Section XI. ) I 5) Volumetric examination of the weld overlay to pipe bond and existing circumferential pipe weld by the ultrasonic examination technique in accordance with recommendations outlined in the EPRI interim report dated April 1985, " Examination of Weld Overlayed Pipe Joints" (Reference 4). I 1I 'I XCP-40-102 6 Revision 2 I nutach

I 3.0 DESIGN AND EVALUATION CRITERIA I 3.1 Weld Overlay Repair Design Criteria The following conservative criteria were used by NUTECH I to design the weld overlay repairs at Brunswick 1: I 1. An IGSCC-induced flaw was assumed to exist 100% through the original pipe wall. This flaw was assumed to be oriented either circumferentially and extend 360' or axially and extend a length of 1.5 times (per Reference 2) the pipe thickness. 2. A bounding fatigue-induced flaw growth of 0.010" into the overlay material was used based upon the NUTECH design report for recirculation safe end and elbow repairs at Monticello Nuclear Generating Plant (Reference 5). 3. The weld overlay repairs for circumferential cracks were designed for a combination of dead weight, internal pressure, and seismic stresses and com-pared to the net section collapse criteria of ASME Section XI (Reference 6) Table IWB-3641-1. Table IWB-3641-1 arbitrarily has a cut-off point at a stress ratio of 0.6; therefore NUTECH has developed l XCP-40-102 7 Revision 2 g nute_qb

an expanded version (Table C-1 in Appendix C) based upon Table IWB-3641-1 source equations shown in Figure C-1 of Appendix C. Stresses were obtained from Reference 7, and are reported in Tables D-1 and D-2 of Appendix D. Weld overlays designed to this criteria can be classified as " standard" overlays per Reference 2. 4. The design of the weld overlay repairs for axial flaws was based on a leak barrier criteria (Reference 8). Weld overlays over weldments with only axial flaws meeting this criteria can be classified as " designed" overlays per Reference 2. 3.2 Flawed Pipe Evaluation Criteria The following conservative criteria were used by NUTECH to evaluate unrepaired flawed weldments at Brunswick 1: I 1. The beginning-of-fuel cycle (evaluation period) bounding flaw size used in the analysis was the as-measured flaw depth by 360" circumferential length (conservative). XCP-40-102 8 Revision 2 nutggh

2. The prediction of end-of-fuel cycle (evaluation period) flaw size was based upon a conservative IGSCC growth correlation which closely agrees with the NRC curve presented in Figure G-1 of Appendix G from NUREG-0313, Appendix A (Reference 2) using a combination of dead weight, internal pressure, differential thermal expansion, and weld overlay shrinkage stresses (caused by weld overlay repair of other welds in the piping system). 3. The calculation of IGSCC flaw growth was based upon conservative post-IHSI butt weld through-wall residual stress distributions shown in Figures G-2 through G-4 of Appendix G from Reference 10. 4. The predicted end-of-fuel cycle (evaluation period) flaw size was compared to Table IWB-3641-5 (Reference 6) allowable flaw depth values for a combination of dead weight, internal pressure, seismic and differential thermal expansion / weld overlay shrinkage stresses. To assess the significance of weld overlay skrinkage stresses on unflawed IHSI-mitigated weldments, the above criteria were used to determine the stress intensity l factor at the tip of a hypothetical 10% through-wall x XCP-40-102 9 Revision 2 nutggb

360* flaw (a 10% flaw depth was chosen since that is a typical threshold depth for reportability). A negative i stress intensity factor would indicate no crack growth would take place. I I I I I I I I I I l I I =e-a-1o eevisie 2 I nutash

i' 4.0 EVALUATION METHODS AND RESULTS I 4.1 Weld Overlay Repair Design I Weld overlay repairs were designed based on the criteria presented in Section 3.1. This design thickness was compared with the as-built thickness less the first layer thickness (which had delta ferrite readings l greater than 7.5 FN), in accordance with Generic Letter 84-11 (Reference 1). Details of design and as-built overlay dimensions are found in Appendix B. As can be seen in Table B-1, the as-built dimensions for each of these weld overlays meet or exceed design dimensions. Table D-1 of Appendix D presents the design of the " standard" overlays. This table shows that the AS!!E Section XI IWB-3641-1 allowable flaw depth ratios exceed the design flaw depth ratios. Table D-2 presents the design of the overlays based upon the presence of only axial cracks. This table shows that the weld overlay repairs have overlay thicknesses exceeding the required values. 1 The ultrasonic examinations of the weld overlay repairs I described in Section 2.0 revealed laminar and planar flaw indications within the weld overlay repairs at five weld locations. These types of indications are XCP-40-102 11 Revision 2 nutg,gh

I addressed in the AS!!E Section XI Code (Reference 6). Appendix E contains a description of the indications for the various weld overlays and a comparison with ASME Section XI allowables. It can be seen that the indications fall within Code allowable sizes and, therefore, the effectiveness of the repairs is not degraded due to the presence of these indications. 4.2 Flawed Pipe Evaluation In order to perform a flawed pipe evaluatien, the effects of weld overlay repairs on the balance of a recirculation system must be quantified. The application of weld over-lay repairs imposes axial and radial shrinkage at weld locations. Axial shrinkage produces secondary stresses on the remainder of the piping system. The effects of the radial shrinkage are limited to the region adjacent to and directly underneath the weld overlay. I The effect of the axial weld shrinkage on the Recircula-tion System was evaluated using the NUTECH computer pro-gram PISTAR (Reference 9) and the piping model presented in Figure 4.2-1. The measured shrinkages due to all overlays applied this outage, as well as those due to I previously applied overlays, were imposed as boundary I I xce-e-m u Revision 2

I I conditions on this model. These shrinkages are listed in Table F-1 of Appendix F. The PISTAR program was used to elastically calculate stress due to weld shrinkage. Table F-2 gives the shrinkage stress for the unoverlayed welds in the recirculation system. I Flawed Weld No. 28-A8 was evaluated using the NUTECH NUTCRAK computer program (Reference 11) and the criteria presented in Section 3.2. Table H-1 of Appendix H presents the details of the evaluation and demonstrates that this weld meets the requirements of the ASME Section XI Code (Reference 6). Unflawed IHSI-mitigated weldments were evaluated for the effects of weld overlay repair shrinkage stress based on the criteria presented in Section 3.2. It was demon-strated that if a 10% through-wall by 360' crack were assumed to exist in the unflawed welds listed in Table F-2 of Appendix F, no crack growth would take place at any of these welds. I I I!I xCF-40-lo2 13 Revision 2 I nute_ch

I I m. I eW cF'" ~ I A .(~ .,% - 4 m 3 E = = <= bY I .K P. " s 2... l N._ _ _ M. n I af l -\\ 1. A-I I 5 Figure 4.2-1 I BRUNSWICK UNIT 1 RECIRCULATION SYSTEM PIPING MODEL XCP-40-102 Revision 2 14 lI nutggh l

I 5.0

SUMMARY

AND CONCLUSIONS I At the end of the 1987 refueling outage, thirty six (36) weld overlays had been applied to various welds in the Recirculation System of Brunswick 1. Twenty-nine (29) of these welds had overlays from previous outages that were built-up to " standard" requirements. Four new " standard" weld overlays were also applied. Three existing repairs were surface finished only. There was one flawed weld which did not require repair. The analyses presented in this report have demonstrated that: I 1. The overlay repaired welds have restored the safety margins inherent in the ASME Code and comply with the requirements of Generic Letter 84-11 (Reference

1) and draft NUREG-0313 (Reference 2).

I 2. The one flawed weld which did not require weld over-lay repair will not exceed the allowable flaw size of Reference 6 as modified by Reference 1 over at least the next 18 months. I 3. The stresses associated with the weld overlay axial shrinkage at unoverlayed locations are acceptable. XCP-40-102 15 Revision 2 I nutggh

I-I

6.0 REFERENCES

I 1) NRC Generic Letter 84-11, dated April 19, 1984, File No. CPLO40.0012. I 2) NUREG-0313, " Technical Report on Material Selection and Processing Guidelines for BWR Coolant Pressure Boundary Piping," Rev. 2 Draft, File No. CPLO40.0012. 3) NUTECH Report CPL-30-100, " Design Report for Recirculation System Weld Overlay Flaw Repairs and Flaw Analysis at Brunswick Steam Electric Plant Unit 1," Revision 2, File No. CPLO40.0012. 4) EPRI Interim Report, " Examination of Weld Overlayed Pipe Joints," dated April 1985, RP1570-2. 5) NUTECH Report NSP-81-105, Revision 2, " Design Report for Recirculation Safe End and Elbow Repairs, Monticello Nuclear Generating Plant," December 1982, File No. CPLO40.0012. 6) ASME Boiler and Pressure Vessel Code, Section XI, 1983 Edition with Addenda through Winter 1985. I XCP-40-102 16 Revision 2 g nutach

I I 7) Carolina Power & Light Company Design Basis Document (DBD) No. 85-20, BSEP Units 1 & 2, 4/10/87, File No. CPLO40.0012. I 8) NUTECH Document COM-76-001, " Weld Overlay Design Criteria for Axfal Cracks," Rev. O, File No. CPLO40.0012. I 9) NUTECH Computer Program PISTAR, File No. CASJO. SOFT.052.1.0.0.2, Version 3.3. I 10) EPRI Document No. NP-2662-LD, " Computational I Residual Stress Analysis for Induction Heating of Uelded BWR Pipes," December 1982. 11) NUTECH Computer Program NUTCRAK, Revision 2.0.2, December 1983, NUTECH File OASJO. SOFT.2.049.00. i I 'I I I I XCP-40-102 17 Revision 2

I I I I I I Appendix A BRUNSWICK UNIT 1 PIPE GEOMETRY AND FLAW CHARACTERIZATION 'I I I .I I I I I I I giit;' l nutgGb

I Table A-1 BRUNSWICK UNIT 1 PIPE GEOMETRY AND FLAW CHARACTERIZATION ISI Pipe Pipe Wall Weld No. Size Config.(a) Thickness Flaw I 4A1 4" P-WOL 0.337" (b) 4A10 4" P-WOL 0.337" (c) 4B1 4" P-WOL 0.337" (b) 4B10 4" P-WOL 0.337" (b) 12-AR-A2 12" P-E 0.66"

Axial, 0.4",

upstream 12-AR-A3 12" E-P 0.75" Circ., 1.75" x 35%, I upstream 12-AR-A4 12" P-PP 0.68" 1.6" x 19%, upstream 12-AR-B2 12" P-E 0.57" 2.0" x 20%, upstream 12-AR-B3 12" E-P 0.63"

Axial, 0.5", downstream 12-AR-B4 12" P-PP 0.68" 1.0" x 45%

12-AR-C2 12" P-E 0.77" Circ., 0.6" x 50%, downstream 12-AR-C3 12" E-P 0.68"

Axial, 0.4", downstream 12-AR-D2 12" P-E 0.65" Axial, 0.60", upstream 12-AR-D3 12" E-P 0.71" Axial, 0.375", downstream 12-AR-D4 12" P-PP 0.66" Circ., 2.0" x 35% upstream 12-AR-E2 12" P-E 0.57" Circ., through-wall (d)

I upstream 12-AR-E3 12" E-P 0.68"

Axial, 0.4", downstream 12-BR-F2 12" P-E 0.79" Axial, 0.75", downstream 12-BR-F4 12" P-PP 0.72" Circ., 0.5 x 23%, upstream Circ., 4.0 x 9%, upstream I

12-BR-G2 12" P-E 0.65" Circ., 1.125" x 25%, upstream 12-BR-G3 12" E-P 0.72"

Axial, 0.8",

upstream 12-BR-G4 12" P-PP 0.74"

Axial, 0.5",

upstream XCP-40-102 A.1 Revision 2 I nutggh

I Table A-1 (Concluded) I BRUNSWICK UNIT 1 PIPE GEOMETRY AND FLAW CHARACTERIZATION ISI Pipe Pipe Wall I Weld No. Size Config.(a) Thickness Flaw 12-BR-H2 12" P-E 0.75"

Axial, 0.4", downstream 12-BR-H3 12" E-P 0.65"

Axial, 0.5",

upstream 12-BR-H4 12" P-PP 0.57" Through-wall (e), downstream 12-BR-J2 12" P-E 0.67"

Axial, 0.6",

upstream 12-BR-J3 12" E-P 0.67" Circ., 4" x 60%, downstream 12-BR-K2 12" P-E 0.57" Axial If) 12-BR-K3 12" E-P 0.76" Axial, 0.75", upstream 12-BR-K4 12" P-PP 0. ~i 4 "

Axial, 0.4",

upstream 22-AM3 22" P-V 1.15" Circ., 3.7" x 30%, upstream 28-A4 28" E-P 1.295"

Axial, 0.6",

upstream I 28-A8 28" E-V 1.088" Circ., 2" x 20%, upstream 28-A14 28" V-E l'.520" Cire., 23" x 20%, downstream 28-A15 28" E-P 1.457" Axial, ll% Id), downstream 28-B4 28" E-P 1.292" Axial, 0.6" x 25%, upstream 28-B8 28" E-V 1.364" Circ., 3" x 30%, upstream NOTES: a) P = Pipe, WOL = Weldolet, E = Elbow, PP = Pup Piece, V = Valve b) No flaw detected but flaw assumed to be present based I on experience with similar weld joints. c) Leaking flaw, unable to size due to geometric I constraints. d) Length not determined. e) Crack orientation not determined. f) Crack size not determined. XCP-40-102 A.2 Revision 2 lI nutqqh l

I I ) l

I Appendix B i

WELD OVERLAY REPAIRS DESIGN VS. AS-BUILT OVERLAY DIMENSIONS I l I I I XCP-40-102 B.O t l Revision 2 !I nutsch

,r-I I 8 4$ UIN. C %" "' 'X l 6 l /A $$/A sr/) S ' & xsA i 5 ** i..a DETAIL B-1 DETAIL B-2 ) I I es* uus. I { l s ma e new DETAIL B-3 DETAIL B-4 I I l c-g f, _ .,x WAVfff///fMAi///f& j s m. DETAIL B-5 Figure B-1 WELD OVERLAY REPAIR DETAILS l XCP-40-102 B.1 m Revision 2 nutach

Table B-1 BRUNSWICK UNIT 1 WELD OVERIAY REPAIRS sbn Mansios Un.) hMR Mmmions Un.) ISI Detail I4) A+B Held No. Number t A B t 4A1 B-1 .130 1.0 (1) .220 1.762 4A10 B-1 .130 1.0 (1) .359 1.732 4B1 B-1 .130 1.0 (1) .287 1.906 4B10 B-1 .130 1.0 (1) .162 1.812 12-AR-A2 B-2 .240 2.25 2.25 .409 4.234 12-AR-A3 B-2 .270 2.25 2.25 .512 4.601 12-AR-A4 B-2 .260 2.0 (2) .380 2.960 12-AR-B2 B-2 .210 2.25 2.25 .314 4.521 12-AR-B3 B-2 .230 2.25 2.25 .385 4.671 12-AR-B4 B-2 .280 2.0 (2) .471 3.012 12-AR-C2 B-2 .270 2.25 2.25 .363 4.870 I 12-AR-C3 B-2 .240 2.25 2.25 527 4.442 12-AR-D2 B-2 .230 2.25 2.25 364 5.254 12-AR-D3 B-2 .250 2.25 2.25 398 4.697 12-AR-D4 B-2 .250 2.0 (2) 399 2.918 12-AR-E2 B-2 .210 2.25 2.25 355 6.248 12-AR-E3 B-2 .240 2.25 2.25 362 4.951 12-BR-F2 B-2 .280 2.25 2.25 312 5.726 12-BR-F4 B-2 .260 2.125 (2) 445 3.640 12-BR-G2 B-2 .230 2.25 2.25 393 5.108 I 12-BR-G3 B-2 .260 2.25 2.25 355 4.759 12-BR-G4 B-2 .320 2.125 (2) 449 2.598 12-BR-H2 B-2 .270 2.25 2.25 328 6.000 12-BR-H3 B-2 .230 2.25 2.25 326 5.445 12-BR-H4 B-2 .260 2.0 (2) 335 3.327 12-BR-J2 B-2 .240 2.25 2.25 408 5.436 I XCP-40-102 B.2 Revision 2 v,--- e- -c g- -r-n m ---~

Table B-1 BIUNSWICK UNIT 1 lELD OVER1AY REPAIRS (Concluded) I Design Dimensions (in.) As-Built Dimensions (in.) 737 y I4) Weld No. Ntznber t A B t A+B 12-BR-J3 B-2 .240 2.25 2.25 .322 5.948 12-BR-K2 B-2 .210 2.25 2.25 .363 5.551 12-BR-K3 B-2 .270 2.25 2.25 .310 5.782 12-BR-K4 B-2 .280 2.125 (2) .313 3.232 22-AM3 B-3 .390 4.0 (3) .783 6.424 28-A4 B-2 .380 3.875 3.875 .573 7.775 28-A14 B-4 .520 2.0 4.125 .710 5.775 28-A15 B-2 .125 3.0 3.0 .385 6.300 28-B4 B -2 .390 3.875 3.875 .554 7.819 28-B8 B-5 .410 3.875 N/A .641 7.500 I NOTES: (1) Overlay extends to weld-o-let with final surface of overlay blending snoothly into contour of weld-o-let. 3 (2) Toe of overlay remains minimum of 0.25" fran maxinum extent 3 of Inconel on the pup piece side. (3) Toe.of overlay blends smoothly into valve. (4) Exclusive of first layer thickness. I I I XCP-40-102 B.3 Revision 2 nutg.gh i

I I I I I l Appendix C i CRITERIA FOR WELD OVERLAY REPAIR DESIGN 1 i 1 lI I i XCP-40-102 C.0 Revision 2 gg . - -. - _. - - - -.... - _ _ - -. ~ _ _,. -.. -

I Table C-1 EXPANDED ALLOWABLE END-OF-EVALUATION PERIOD FLAW DEPTHIII-TO-THICKNESS RATIO FOR CIRCUMFERENTIAL FLAWS NORMAL OPERATING CONDITIONS I P,, Pb Ratio of Flaw Length, Ag, to Pipe Circumference (Note (3)] 0.5 [ Note (2)) 0.0 0.1 0.2 0.3 0.4 or More I 1.5 (4) (4) (4) (4) (4) (4) 1.4 0.75 0.40 0.21 0.15 (4 ) (4 ) l 1.3 0.75 0.75 0.39 0.27 0.22 0.19 1.2 0.75 0.75 0.56 0.40 0.32 0.27 1.1 0.75 0.75 0.73 0.51 0.42 0.34 I 1.0 0.75 0.75 0.75 0.63 0.51 0.41 0.9 0.75 0.75 0.75 0.73 0.59 0.47 0.8 0.75 0.75 0.75 0.75 0.68 0.53 0.7 0.75 0.75 0.75 0.75 0.75 0.58 I 0.6 0.75 0.75 0.75 0.75 0.75 0.63 0.5 (5) 0.75 0.75 0.75 0.75 0.75 0.68 0.4 (5) 0.75 0.75 0.75 0.75 0.75 0.73 0.36 (5) 0.75 0.75 0.75 0.75 0.75 0.75 I NOTES: (1) Flaw depth = a for a surface flaw n 2a for a subsurface flaw n t= nominal thickness Linear interpolation is permissable. (2) P, = primary membrane stress Pb = primary bending stress S = allowable design stress intensity (in accordance with Section III) (3) Circumference based on nominal pipe diameter. (4) IWB-3514.3 shall be used. (5) Derived using source equations. I I I I XCP-40-102 Revision 2 C.1 nutggh

I I For a + s < 1800 1 -a 8 6 8= (radians) 2 2.773 (SR) -0.5-((2 sin 8-{sina) 0 = For a + s > 18 08 s= (radians) 2p 2.773 (SR) -0.5-h(2-{} sin S = 0 g ..r.. I a = half-crack length (radians) S = neutral axis location angle (radians) a = flaw depth (inches) t = pipe thickness (inches) SR = stress ratio = Pm + Pb I Pm a primary membrane $ frees Pb = primary bending stress Se = allowable stress intensity (per ASME Section III Appendices) I I t I g A MA = Neutral Axis 3 = Mean Radius l Figure C-1 SOURCE EQUATIONS FOR ALLOWABLE END-OF-EVALUATION PERIOD FLAW DEPTH-TO-THICKNESS RATIOS FOR CIRCUMFERENTIAL FLAWS I XCP-40-102 C.2 Revision 2 I nutash _ _. _ _. _ _ _ _ _ _ _. _ _. _ _ _ _ _ _ _.. _ ~..,.

I Table C-2 DESIGN CRITERIA FOR AXIAL IGSCC (REFERENCE 8) I I NONDIMENSIONAL FLAW LENGTH STRESS %//TT RATIO 0.00 0.25 0.50 1.00 2.00 I s s 0.40 z 0.50 a 0.00 I 0.70 a - IWB-3640 0.80 = 0.90 z 0.96 I 1.00 s

• LEAK BARRIER ONLY REQUIRED ALL DEFINITIONS SAME AS IW84640 STRESS RATIO = PD /2 TSm I

P = MAXIMUM PRESSURE FOR NORMAL OPERATING CONDITIONS D = NOMINAL OUTSIDE DIAMETER OF THE PIPE T = NOMINAL THICKNESS q = ENDOF EVALUATION PERIOD FLAW LENGTH R = NOMINAL RADIUS OF THE PIPE I I lI !l XCP-40-102 u Revision 2 C.3 l l nutggh

I I I I I i Appendix D EVALUATION OF WELD OVERLAY REPAIRS I 'I

l l

i I ' I 'I 1I l I I l XCP-40-102 D.0 Revision 2 I

I i Table D-1 DESIGNED VERSUS ALLOWABLE PLAW-DEPTH RATIOS FOR " STANDARD" WELD OVERLAY REPAIRS I I ISI WaMrsuLL FRS-WOR IwB-3641-1 NEta 0.D. III Ty (2) yo(3) TI8I STRESS A(5) g(6) ALIAWABLE DESICNED j NO. (IN.) (IN.) (IN.) (IN.) (FSI) (IN.) (DECREE 8) FIAII SRII FORW FDRIU I 4A1 4.50 0.375 0.220 0.395 6663 0.303 360 1.0 0.25 0.75 0.65 4A10 4.50 0.323 0.359 0.684 7897 0.335 360 1.0 0.22 0.75 0.49 481 4.50 0.340 0.287 0.627 6630 0.350 360 1.0 0.21 0.75 0.56 4810 4.50 0.350 0.162 0.312 7988 0.360 See 1.0 0.32 0.75 0.70 B2-AA-A2 12.75 0.660 0.409 1.049 7749 0.670 360 1.0 0.28 0.75 0.63 I 12-AR-44 12-AA-A3 12.73 0.750 0.312 1.262 8493 0.760 360 1.0 0.30 0.75 0.60 12.75 0.680 0.300 1.060 8903 0.690 360 1.0 0.34 0.75 0.65 12-AR-52 12.75 0.870 0.314 0.884 7353 0.580 360 1.0 0.28 0.75 0.66 12-AR-B3 12.75 0.630 0.385 1.013 7973 0.640 360 1.0 0.29 0.75 0.63 12-AR-84 12.75 0.680 0.471 1.151 9779 0.690 360 1.0 0.34 0.75 0.50 12*AA-C2 12.75 0.770 0.363 1.133 7771 0.700 360 1.0 0.31 0.75 0.49 12-AR-C3 12.75 0.600 0.527 1.207 1604 0.690 360 1.0 0.25 0.75 0.37 12-AA-D2 12.75 0.650 0.364 1.014 6975 0.640 360 1.0 0.26 0.75 0.45 12-AR-D3 12.75 0.710 0.398 1.108 7258 0.720 360 1.0 0.27 0.75 0.45 12-AR-D4 12.73 0.460 0.399 1.039 9040 0.670 360 1.0 0.33 0.75 0.63 I 12-AR-E2 12.75 0.370 0.335 0.923 7267 0.580 340 1.0 0.26 0.75 0.63 12-AR-33 12.75 0.680 0.362 1.042 7501 0.690 360 1.0 0.29 0.75 0.66 12-BR-F2 12.73 0.790 0.312 1.102 8917 0.000 360 1.0 0.29 0.75 0.73 12-BR-F4 12.75 0.720 J.443 1.165 0655 0.730 340 1.0 0.32 0.75 0.63 12-BR-C2 12.75 0.650 0.393 1.043 7304 0.660 360 1.0 0.27 0.75 0.63 12-BR-43 12.75 0.720 0.355 1.075 7442 0.730 See 1.0 0.29 0.75 0.68 12-BR-44 12.73 0.740 0.449 1.189 10260 0.750 360 1.0 0.38 0.74 0.63 12-BR-E2 12.75 0.750 0.328 1.078 7754 0.760 360 1.0 0.32 0.75 0.71 12-BR-E3 12.75 0.650 0.326 0.976 7493 0.660 360 1.0 0.29 0.75 0.68 I 12-BR-E4 12.75 0.370 0.335 0.905 11077 0.580 360 1.0 0.41 0.72 0.64 12-BR-J2 12.73 0.670 0.408 1.078 7374 0.680 360 1.0 0.27 0.75 0.63 12-BR-J3 12.75 0.670 0.322 0.992 7398 0.680 360 1.0 0.30 0.75 0.69 12-BR-E2 12.75 0.370 0.363 0.933 7454 0.500 360 1.0 0.27 0.75 0.62 12-BR-E3 12.15 0.760 0.310 1.010 0205 0.770 340 1.0 0.34 0.75 0.72 I 22-AM3 12-BR-E4 12.73 0.740 0.313 1.053 8700 0.750 360 1.0 0.34 0.75 0.71 22.00 1.150 0.783 1.933 7773 1.160 360 1.0 0.27 0.75 0.60 28-A4 20.00 1.29S 0.573 1.868 7360 1.305 360 1.0 0.30 0.75 0.70 20-A14 20.00 1.520 0.710 2.230 9500 1.330 360 1.0 0.37 0.75 0.69 28-A15 20.00 1.457 m(103 m(183 m(183 m (183 m(103 mR(10) un(10) un(10) ,n(10) I 28-84 20-34 28.00 1.292 0.354 1.846 7492 1.302 360 1.0 0.31 0.75 0.71 20.00 1.364 0.641 2.003 8218 1.374 360 1.0 0.33 0.75 0.69 NOTES:

1. 0.D. m CUTSIDE DINSTRA 2.

TF = OR20ZIELL AS-BUILT FIFE m!.L TWICENESS 3. TO e TE*CENE88 0F OVERIAT t 4. T = TF + TO. S. A = EVAImTION FIAN DEPTE e M + F&TICUB CRACE GRDNTE OF.010*. 6. L = EVALUETICII FIAN LENCTE

7. FLR = FLAN LBIIOTE B&TIO S.

SR e STRESS RATIO I

10. Tars v51a uns NOT IVAI.UhTED FOR CIRCtatERENTIAL FIANS

9. FDR = FIAN DEPTE DATIO BEcAUsE IT CONtatus AXIAL FIANS ONLY I

XCP-40-102 D,1 l Rc-vision 2 nutggh

I I Table D-2 AS-BUILT VERSUS REQUIRED WELD OVERLAY THICKNESS FOR WELD OVERLAYS ASSUMING AXIAL FLAWS ONLY I Is! NcocNa!. INTERNAI. REocIRzD AS-acI1T WEID 0.D. III TP (2) PRESSURE AIII LIII APPI.IED TOI7I TOI7) No. (IN.) (IN.) (P3I) (IN.) (IN.) FLR(5) gg(6) ggy,g ggy,g 4A1 4.50 0.375 1005.0 0.385 0.563 0.612 0.356 0.125 0.220 4A10 4.50 0.323 1005.0 0.335 0.488 0.570 0.410 0.125 0.359 431 4.50 0.340 1005.0 0.350 0.510 0.583 0.392 0.123 0.287 4a10 4.50 0.350 1005.0 0.360 0.525 0.592 0.381 0.125 0.162 I 12-AR-A2 12.75 0.660 1005.0 0.670 0.990 0.483 0.573 0.125 0.409 12-AR-A3 12.75 0.750 1003.0 0.760 1.125 0.514 0.504 0.125 0.512 12-AR-A4 12.75 0.680 1005.0 0.690 1.020 0.490 0.556 0.125 0.380 12-AR-32 12.75 0.570 1003.0 0.580 0.855 0.449 0.663 0.125 0.314 12-AR-33 12.75 0.630 1005.0 0.640 0.945 0.472 0.600 0.125 0.385 12-AR-54 12.75 0.680 1005.0 0.690 1.020 0.490 0.536 0.125 0.471 12-AR-C2 12.75 0.770 1005.0 0.780 1.153 0.521 0.491 0.125 0.363 12-AR-C3 12.75 0.680 1005.0 0.690 1.020 0.490 0.536 0.125 0.527 12-AR-D2 12.75 0.650 1005.0 0.660 0.975 0.479 0.542 0.125 0.364 12-AR-D3 12.75 0.710 1003.0 0.720 1.065 0.501 0.532 0.125 0.398 12-ARQ4 12.73 0.660 1005.0 0.670 0.990 0.483 0.573 0.125 0.399 12-AR-E2 12.75 0.570 1005.0 0.500 0.855 0.449 0.663 0.125 0.355 12-AR-33 12.73 0.680 1005.0 0.690 1.020 0.490 0.556 0.125 0.362 12-BR-F2 12.75 0.790 1005.0 0.000 1.185 0.520 0.478 0.125 0.312 I 12-BR-F4 12.75 0.720 1005.0 0.730 1.080 0.504 0.523 0.123 0.445 12-BR-G2 12.75 0.650 1003.0 0.660 0.975 0.479 0.582 0.125 0.393 12-BR-C3 12.75 0.720 1005.0 0.730 1.080 0.504 0.525 0.125 0.355 12-BR-C4 12.75 0.740 1005.0 0.750 1.110 0.511 0.511 0.125 0.449 12-BR-E2 12.75 0.750 1005.0 0.760 1.123 0.314 0.504 0.125 0.328 12-BR-F3 12.75 0.650 1005.0 0.660 0.975 0.479 0.582 0.125 0.326 12-am-54 12.75 0.570 1005.0 0.580 0.855 0.449 0.643 0.125 0.335 12-BR-J2 12.75 0.670 1005.0 0.680 1.003 0.486 0.564 0.125 0.408 12-BR-J3 12.75 0.670 1005.0 0.680 1.003 0.446 0.564 0.125 0.322 12-BR-E2 12.75 0.570 1005.0 0.500 0.835 0.449 0.663 0.125 0.363 12-BR-K3 12.75 0.750 1005.0 0.770 1.140 0.518 0.497 0.125 0.310 12-BR-E4 12.75 0.740 1003.0 0.750 1.110 0.511 0.511 0.125 0.313 22-AM3 22.00 1.150 1005.0 1.160 1.725 0.485 0.567 0.125 0.783 28-A4 28.00 1.295 1003.0 1.303 1.943 0.456 0.641 0.125 0.573 I 28-114 28.00 1.520 1005.0 1.330 2.280 0.494 0.546 0.125 0.710 28-115 20.00 1.457 1005.0 1.467 2.186 0.484 0.570 0.123 0.385 28-34 20.00 1.292 1005.0 1.302 1.938 0.456 0.642 0.125 0.554 28-88 28.00 1.364 1005.0 1.374 2.046 0.468 0.609 0.125 0.641 I I NOTES:

1. 0.D. = CUTSIDE DIADSTER 2.

TP = ORIGINAL AS-SUILT PIPE WELL TEICENESS 3. & = IVALUETION FIAN DEPTE = TP + FATIGUE CRACE CR0erts CF 0.010' 4. L = EVALUkTION FIAN LENGTE = 1.5

• TP (PER REFERENCE 2)

5. FIA = FIAN LENGTE RATIO 6.

SR = APPLIED STPESS SATIO CALCUIATED FRitt F030 CIA PRESENTED IN ThBI2 C-2 FOOTtIOTES I 7. TO = TRICENESS CF OVERIAT I XCP-40-102 D.2 Revision 2 I nutach

i l I I Appendix E WELD OVERLAY REPAIR FLAW EVALUATION I I 'I I lI iI l I XCP-40-102 E.0 Revision 2 l g nutach

i Table E-1 LAMINAR FLAW EVALUATION Wall Laminar Laminar Allowable (2) ISI Thickness III Flaw Length Flaw Width Flaw Area Flaw Area Weld No. (inches) (inches) (inches) (sq. in.) (sq. in.) 12-AR-A3 1.341 21.0 0.l(3) 2.10 2.68 12-BR-G3 1.273 10.0 0.1 1.00 2.55 12-BR-K3 1.110 7.0 0.1(3) 0.10 2.22 28-A4 1.761 2.5 0.1 0.25 3.52 28-A14 2.330 36.0(4) 0.1 3.60 4.66 NOTES: (1) Hall Thickness = Pipe Wall Thickness + Overlay Thickness (include-ing first layer). (2) From Table IWB-3514-3 of Reference 6. (3) Assumed value. No width of flaw detected. (4) Includes length of planar indication evaluated in Table E-2. 1 XCP-40-102 E.1 Revision 2 gg

I Table E-2 PLANAR FLAW EVALUATION FOR WELD NO. 28-A14(1) i Wall Planar Planar Evaluation Thickness Flaw Length Flaw Depth Flaw Depth (inches) (inches) (inches) Ratio (3) 2.330 20 0.15 0.13 I Applied Flaw Allowable Stress Length Flaw De th Ratio (4) Ratio (5) RatioI ) 0.37 0.23 0.75 I Notes: 1. Flaw is completely contained within weld overlay I repair. 2. See Note 1 in Table E-1. 3. (Flaw depth divided by wall thickness) x 2. 4. From Table D-1. 5. Flaw length divided by pipe circumference. 6. From Table C-1. l l XCP-40-102 E.2 Revision 2

e e a s. I I Appendix F g usto ovsetix xxxis Se.1sxiceS xso SHRINKAGE STRESSES I I I I XCP-40-102 F.0 Revision 2 lI nutg_9h l

I Table F-1 I AXIAL SHRINKAGES AT REPAIR LOCATIONS ISI Weld No. Shrinkage (in.) 4A1 N/A I 4A10 N/A 4B1 N/A 4B10 N/A 12-AR-A2 .378 12-AR-A3 .272 12-AR-A4 .205 12-AR-B2 .352 12-AR-B3 .269 12-AR-B4 .234 12-AR-C2 .242 12-AR-C3 .223 12-AR-D2 .483 12-AR-D3 .204 12-AR-D4 .206 12-AR-E2 .483 12-AR-E3 .322 12-BR-F2 .264 12-BR-F4 .182 12-BR-G2 .310 12-BR-G3 .220 12-BR-G4 .114 12-BR-H2 .166 12-BR-H3 .275 12-BR-H4 .085 I XCP-40-102 F.1 l Revision 2 I nutac..h

I Table F-1 AXIAL SHRINKAGES AT REPAIR LOCATIONS (Concluded) I I ISI Weld No. Shrinkage (in.) 12-BR-J2 .244 12-BR-J3 .311 12-BR-K2 .306 12-BR-K3 .304 12-BR-K4 .532 I 22-AM3 .050 28-A4 .057 28-A14 .195 28-A15 .040 28-B4 .112 28-B8 .429 'I I I I I I XCP-40-102 F.2 Revision 2 i I nutac.h

I Table F-2 i I

SUMMARY

OF AXIAL SHRINKAGE STRESSES AT UNOVERLAYED WELDS ISI Shrinkage ISI Shrinkage Weld No. Stress (psi) Weld No. Stress (psi) 12-AR-Al 2003 12-BR-H1 3752 12-AR-B1 3208 12-BR-J1 770 I 12-AR-Cl 1479 12-BR-J4 718 12-AR-C4 3977 12-BR-K1 4884 12-AR-D1 4660 22-BM1 0 12-AR-El 3052 22-BM2 2935 12-AR-E4 3017 22-BM3 1833 22-AM1 2240 22-BM4 2366 I 22-AM2 1883 28-B2 440 22-AM4 2865 28-B3 475 22-AM5 2670 28-B5 428 I 22-AM6 0 28-B6 269 28-A2 195 28-B7 146 28-A3 188 28-B9 238 28-A5 399 28-B10 283 28-A6 438 28-Bil 305 28-A7 491 28-B12 315 I 28-A8 338 28-B13 322 28-A9 170 28-B14 358 28-A10 160 28-B15 352 28-All 254 28-B16 220 28-Al2 311 28-B17 652 28-A13 336 28-A16 658 28-A17 1300 12-BR-F1 2056 12-BR-F3 2354 12-BR-G1 3922 xce-40-102 F.3 nevision 2 nuta b

~ I I I I I Appendix G l I 1 CRITERIA FOR FLAWED PIPE EVALUATION I

I I

I I I lI l XCP-40-102 G.0 Revision 2 ,I "6 i --..e .,-w w e-4, --,-e . +,.,, ---o e ma. ~w-- + ,cy- -,,..,,.p-& ..w.,..w.w,w.mw9m.,,e

I I 104-I p vs K for intergranular Stress Corroom Cracking 150 x 104 2 K.141 l I I I I f5-I 104 .l I I I 3 x 104 I I I I I I I ' I 10 15 20 25 30 40 50 60 70 80 90 100 I K, (ksi 4 'I g m ue c-1 STRESS-CORROSION CRACK GROWTH RATE (Reference 2) XCP-40-102 g,y Revision 2 I nutach

I I I I M Po M Pa I OUTER SkJRFAC[06-300 -200 -soo 0 60 0 200 300 -300 -200 -s00 0 soo 200 300 06- ,,3 x ) WELDING \\ (15.2cm) / I / -- WELDING 15-05-1 +lHSI f f .._ l Q l l I / w u----.r d 8*" #0/ -10 - 0593 I in / 0 (I.Sical 1030cm) - h-E - R = S.375 m p#~ (13.65cm) f o3 02-_oS 02- -05 i e I C 5 0s-0 s-g L INNER SURFACE I 1 w -40 -20 0 20 40 -40 -20 0 20 40 RESIOUAL AXIAL STRESS, tai RESIOUAL CIRCUMFERENTIAL STRESS,hei I Figure G-2 PRE-AND POST-IHSI THROUGH-WALL I RESIDUAL STRESS DISTRIBUTION FOR 12" NPS PIPES (Reference 10) I I I I XCP-40-102 G.2 Revision 2 g nutash

i I l i (25 4cml hIOmed I y q WELD x _ d [ \\V [ -- WELD + 1HSI T' v: n=- F LOWING WAT ER I 0 843m(214 cm) R4 Om(20.3cm) y p, -300 200 -10 0 0 100 200 300 -300 200 -100 0 60 0 200 300 I e a e gi n e e a I' OUTER SURFACE g g g J ag N Wa \\ U.. I g w..., I -2 al I/ E - -6 / gg-.6 / z l EU '/ 5 o- / BE j I 4 -4 / / f I .2 f I .2 N .\\ -40 -20 0 20 40 -40 -20 0 20 40 RESIDUAL AXtAL STRESS, hel RESIDUAL CIRCUMFERENTAL STRESS, kel I Figure G-3 PRE-AND POST-IHSI THROUGH-WALL RESIDUAL STRESS DISTRIBUTION FOR 22" NPS PIPES (Reference 10) I I I XCP-40-102 G.3 Revision 2 I "" M

E I I M Ps M Pe -300 200 -e00 0 10 0 200 300 -300 -200 -100 0 100 200 300 400 g i 3 / I WELD .s 3 (35 6cm) g _3 j bl40md f 7 f' h -- WELD + 1HSI g 5 o J e I.0-I 10-a: FLOWIfe4 WATER l y -13in(3.3cm) M j E / - R al3.0in(33.02 cm) 6 E / / k / / / E ( [/ I @ OS-I g OS-1

g e

-1 -1 I s m 8 ?! I g N. INNER SURFACE l -60 -40 -20 0 20 40 -60 -40 -20 0 20 40 RESIDUAL AXIAL STRESS, kol RESIOUAL CIRCUMFERENTIAL STRESS, kol I Figure G-4 PRE-AND POST-IHSI THROUGH-WALL RESIDUAL STRESS DISTRIBUTION FOR 28" NPS PIPES (Reference 10) I I XCP-40-102 G.4 Revision 2

l l l l I i l Appendix H EVALUATION OF FLAWED WELDS 'I l 1 I I l l i l I me-o-m e.o Revision 2 l nutggh

Table H-1 I FLAWED PIPE EVALUATION FOR WELD NO. 28-A8 ~ Nominal Sustained O.D.II) t(2) a(3) Stress (5) (in.) (in.) (%) L(4) (psi) 28.0 1.088 20 360* 10,043 Predicted Applied IWB-3641-5 End-of-Cycle Flaw Stress Allowable Flaw Depth Ratio Ratio (6) Depth RatioI7) 0.20 0.60 0.60 Notes: I 1. O.D. = outside diameter 2. t = pipe wall thickness 3. a = beginning-of-cycle flaw depth 4. L = crack growth evaluation flaw length 5. Sustained stress = dead weight + internal pressure + thermal expansion + weld overlay shrinkage stresses 6. Applied stress ratio based upon S,= 16,950 psi for 304 stainless steel pipe and fittings at 550*F operating temperature 7. Allowable flaw depth based upon measured flaw length of 2" !'I XCP-40-102 H.1 Revision 2 g nu - - -}}