ML13051A197

San Onofre, Unit 2, Enclosure 6, LTR-SGDA-12-36, Rev. 3, Flow-Induced Vibration and Tube Wear Analysis of the San Onofre Nuclear Generating Station Unit 2 Replacement Steam Generators Supporting Restart. Cover Through Page 227 of 415

ML13051A197
Person / Time
Site:	San Onofre
Issue date:	02/15/2013
From:	Bell B A, Cullen W K, Hall J M, Langford P J, Norman T L, Pournaras T J, Prabhu P J, Thakkar J G Westinghouse
To:	Office of Nuclear Reactor Regulation
References
TAC ME9727 1814-AA086-M0238, Rev 0, LTR-SGDA-12-36, Rev 3
Download: ML13051A197 (228)

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ENCLOSURE 6WEC Non-Proprietary DocumentLTR-SGDA-12-36, Flow-Induced Vibration and Tube WearAnalysis of the San Onofre Nuclear Generating Station Unit 2Replacement Steam Generators Supporting Restart(Non-Proprietary)

Westinghouse Non-Proprietary Class 3Page 1 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013LTR-SGDA-12-36, Revision 3Flow-Induced Vibration and Tube Wear Analysis of theSan Onofre Nuclear Generating Station Unit 2Replacement Steam Generators Supporting RestartSupplie Statu sStamp~.181 4-AA086-M0238 I ýI'N/ANCE DCUKY-OML4TONL ouv fltP KWU MANUALMPS MAY PROCUWD l3Y OO AWSTATUS -A d" rie Iku *dIWV doaainmf OWd It cpmI muIm~g~in *dv -pii dm i r~eli &W , o :Idm 0u! OWmt~ DoAW sUNWT~ of d~Wr -.idW4**id 10,NOT AFPPROE -CaMu mid .mNeir~o mis. ?SrM i~rWe.0mwFebruary 15, 2013J. M. HallB. A. BellW. K. CullenT. L. NormanR J. PrabhuT. J. PournarasJ. G. ThakkarP. J. LangfordReviewed by:D. P. SiskaSCE DE(23) S REV. 3 07/11REFERENCES0123-XXIV-7.8.26SG Management ProgramsApproved by:N. D. Vitale, ManagerSG Design and AnalysisWestinghouse Electric Company LLC1000 Westinghouse DriveCranberry Township, PA 16066, USA© 2013 Westinghouse Electric Company LLCAll Rights Reserved1814-AA086-M0238, REV. 0Page 2 of 415 Page 2 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table of Contents1.0 Introduction ........................................................................................................................... 71.1 Steam Generator Design Configuration ..................................................................... 71.2 Degradation M odes Addressed ................................................................................... 81.3 Sum m ary of O peration and Inspection Plan ............................................................... 81.4 Description of Methodology ........................................................................................ 82.0 Sum m ary/Conclusions ................................................................................................... 122.1 FIV Results Sum m ary ............................................................................................... 122.1.1 O ut-of-Plane ........................................................................................................ 132.1.2 In-Plane ................................................................................................................... 132.2 W ear Analysis Sum m ary .......................................................................................... 132.2.1 Tube W ear Sum m ary .......................................................................................... 132.2.2 AVB W ear Potential ............................................................................................. 142.3 Potential for In-Plane Tube-to-Tube Contact and In-Plane Instability ....................... 142.4 M odification of Plugging Criteria Considering Unit 3 Data ........................................ 152.5 Sum m ary and Recom m endations ............................................................................ 163.0 ATHO S Analysis ................................................................................................................. 183.1 Analysis M ethods ...................................................................................................... 183.1.1 Description of Com puter Codes .......................................................................... 183.1.2 Discussion of Significant Assum ptions ................................................................. 203.1.3 Acceptance Criteria ............................................................................................ 213.1.4 Input ........................................................................................................................ 213.2 Power Levels ................................................................................................................. 313.3 Results Sum m ary ...................................................................................................... 313.4 Unit 3 O perating Conditions ..................................................................................... 463.5 References .................................................................................................................... 614.0 Flow-Induced Vibration Analysis ...................................................................................... 634.1 FIV Introduction ........................................................................................................ 634.2 M ethod .......................................................................................................................... 814.2.1 Fluidelastic Excitation .......................................................................................... 834.2.2 Flow Turbulence ................................................................................................. 864.2.3 Dam ping in the Straight Leg Region .................................................................. 874.2.4 Dam ping in the U-bend Region .......................................................................... 871814-AA086-M0238, REV. 0 Page 3 of 415 Page 3 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table of Contents (cont.)4.2.5 Flow-Induced Vibration Relevant Input Parameters ............................................ 884.2.6 Flow-Induced Vibration Model ............................................................................ 974.3 Typical Results ............................................................................................................ 1014.3.1 Out-of-Plane Results ............................................................................................. 1014.3.2 In-Plane Results .................................................................................................... 1014.3.3 Typical Mode Shapes ............................................................................................ 1384.4 Additional Considerations ........................................................................................... 1554.4.1 SG 2E088 versus SG 2E089 and Low versus High Column ................................. 1554.4.2 Effects of Different Mass on Tube Response ........................................................ 1664.4.3 Stabilization Using Two Cables ............................................................................. 1674.5 FIV versus Power Level Discussion ............................................................................ 1774.6 Unit 3 100% Power FIV Evaluation ............................................................................. 1794.7 References .................................................................................................................. 1835.0 SONGS Unit 2 Eddy Current Summary and Review ........................................................ 1855.1 AVB/TSP W ear ............................................................................................................ 1855.1.1 SG 2E088 .............................................................................................................. 1865.1.2 SG 2E089 .............................................................................................................. 1865.1.3 In-Plane W ear Indications (W ear Outside of AVB) ................................................ 1865.1.4 AVB Insertion Depths for Column 81 and Tube Denting at AVB Observations .... 1875.1.5 Estimate of the Number of Ineffective Supports .................................................... 1885.2 Tube-to-Tube W ear and Proximity Review ................................................................. 1885.2.1 Initial Tube-to-Tube Proxim ity Review ................................................................... 1885.2.2 Supplemental Proxim ity Review ............................................................................ 1895.2.3 Review of Field Reported Wear on R113 C81 and R111 C81 in Unit 2 SG 2E0891905.3 Tube Plugging Summary .................................................................................................. 1935.4 Sum mary of Unit 3 Eddy Current Review ......................................................................... 1935.4.1 Observations Related to AVB Symmetry Variance and Wear Scar Geometry ...... 1945.4.2 Observations Related to Tube Motions ................................................................. 1945.4.3 Observations of W ear at the Top TSP .................................................................. 1945.5 References .................................................................................................................. 1971814-AA086-M0238, REV. 0 Page 4 of 415 Page 4 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table of Contents (cont.)6.0 Critical Tubes .................................................................................................................... 2276.1 M ethod ........................................................................................................................ 2276.2 Tube Groups ............................................................................................................... 2286.3 Enveloping Tubes ....................................................................................................... 2447.0 W ear Analysis ................................................................................................................... 2487.1 General Methodology .................................................................................................. 2487.2 Wear Considerations -Fluidelastic Tube Excitation versus Turbulence .................... 2487.2.1 W estinghouse Test Program s ............................................................................... 2507.2.2 W estinghouse Design Basis .................................................................................. 2537.2.3 O perational History of "Plant B". ........................................................................... 2577.2.4 Application to SO NGS Steam Generators ............................................................ 2587.3 Tube W ear Projection Results ..................................................................................... 2617.3.1 Active Tubes .......................................................................................................... 2627.3.2 Plugged Tubes ...................................................................................................... 2637.3.3 R 11-113/C81 Tube/AVB W ear Results ............................................................... 2647.3.4 Potential for Increased Probability of IP M odes after W ear ................................... 2657.4 Potential for W ear on AVB Surfaces ........................................................................... 2667.4.1 Tube FIV Induced W ear ........................................................................................ 2667.4.2 AVB FIV Induced W ear Potential .......................................................................... 2667.5 Potential for Additional Tube-to-Tube Wear at R1 11/1 13C81 ................ 2677.6 Sum m ary ..................................................................................................................... 2707.7 References .................................................................................................................. 2718.0 Additional Considerations ................................................................................................. 3048.1 Evidence for Lack of In-Plane Instability in Unit 2 ....................................................... 3048.1.1 FIV Results ............................................................................................................ 3048.1.2 ECT Results .......................................................................................................... 3058.2 Upper Bundle Tube Proxim ity ..................................................................................... 3058.2.1 Potential M anufacturing Issues ............................................................................. 3058.2.2 Sum m ary Eddy Current Data -PSI / ISI ................................................................ 3088.2.3 Additional Considerations from Unit 3 ................................................................... 3098.2.4 Conclusions ........................................................................................................... 3091814-AA086-M0238, REV. 0 Page 5 of 415 Page 5 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table of Contents (cont.)8.3 Low Stability Ratio Tubes with Higher W ear ............................................................... 3098.4 W ear Projection Uncertainty ........................................................................................ 3109.0 Consideration of Unit 3 Tube Wear on Wear Model Applied in Unit 2 .............................. 3209.1 Unit 3 Critical Tube Selection for Model Validation ..................................................... 3209.2 Unit 3 Analysis ............................................................................................................. 3209.3 Plugging Criteria Development .................................................................................... 3229.3.1 Criterion 1 -Free Span Contact ................................................................................ 3229.3.2 Criterion 2 -W ear Outside AVB sites ........................................................................ 3229.3.3 Criterion 3 -Ineffective AVB Sites and In-Plane Motion ........................................... 3229.3.4 Criterion 4 -W ear at Top TSP Sites ......................................................................... 3239.3.5 Criterion 5 -AVB Sites and Wear Potential due to Out-of-Plane Motion .................. 3249.4 Application of the Criteria to the Unit 3 Tube Sample ................................................. 3259.5 Application to Unit 2 .................................................................................................... 32510.0 Recommendations Regarding Operation at Reduced Power Levels ................................ 34110.1 Additional Unit 2 Tube Plugging Due to Criterion 4 ..................................................... 34110.2 Tube W ear Criterion 5 ................................................................................................. 34110.3 Recommendations ...................................................................................................... 34210.4 References .................................................................................................................. 34 3Appendix A: Nomenclature ....................................................................................................... 344Appendix B Additional Proximity Analysis for Ri 11/1 13C81 .................................................... 349B-1 Introduction ................................................................................................................. 349B-2 Eddy Current Review .................................................................................................. 349B-2.1 Industry Freespan Wear Experience Without In-Plane Instability ......................... 349B-2.2 Causative Mechanism for Explanation of the Presence of Freespan Wear Without WearExtension from AVBs .......................................................................................................... 350B-2.3 Detection Condition Associated with Wear Extension from AVBs ........................ 352B-3 Temperature Pressure and FIV Effects ....................................................................... 353B-3.1 Tube Thermal Expansion ...................................................................................... 353B-3.2 Tube Movement at AVB 5 ..................................................................................... 354B-3.3 In-Plane Turbulent Displacement .......................................................................... 354B-4 Summary ..................................................................................................................... 355B-5 References .................................................................................................................. 3561814-AA086-M0238, REV. 0Page 6 of 415 Page 6 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table of Contents (cont.)Appendix C Effect of Installation of Split Cable Stabilizers in the Tube FIV Response ............ 372C-1 Introduction ................................................................................................................. 372C-2 Method ........................................................................................................................ 372C-2.1 FASTVIB ............................................................................................................... 372C-2.2 Stabilizer Properties .............................................................................................. 373C-3 Results ........................................................................................................................ 375C-4 Conclusions ................................................................................................................. 414C-5 References .................................................................................................................. 4141814-AA086-M0238, REV. 0Page 7 of 415 Page 7 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20131.0 IntroductionSan Onofre Nuclear Generating Station (SONGS) Unit 2 is a two-loop pressurized water reactor thatstarted commercial operation in 1983. The original steam generators (SGs), which were designed andbuilt by Combustion Engineering (CE), were replaced in 2010 after 16 fuel cycles. The replacementsteam generators (RSGs) were designed and fabricated by Mitsubishi Heavy Industries (MHI).The first in-service inspection (ISI) of the Unit 2 RSGs was performed in 2012. This inspectionidentified a large number of tube wear indications at various support locations both in the straight legsections and in the U-bend. Several tubes were plugged during the outage and cable stabilizers wereinstalled in many of the plugged tubes prior to plugging. This report describes the evaluation performedby Westinghouse to assess the tubes with wear indications in the U-bend for continued operation in thenext fuel cycle.This evaluation uses a semi-empirical method that has been used for the flow-induced vibration (FIV)analysis and design of the SGs. The analytical methodology was developed by Westinghouse basedon a very robust test program several decades ago and has been published in the open literature (seeReferences 7-1, and 7-6 through 7-10 in Section 7). The basic formulations have been well understoodand accepted by experts in the industry. The methodology in conjunction with relevant manufacturingcontrols has been applied successfully with outstanding results in SGs designed by Westinghouse overthe past three decades.1.1 Steam Generator Design ConfigurationEach RSG has 9727 U-tubes made of thermally treated Alloy 690 (SB-163, UNS N06690) with anoutside diameter of 0.75 inch and an average wall thickness of 0.043 inch (all dimensions are nominalunless otherwise noted). The tubes are arranged in a triangular pitch of 1.00 inch such that thedistance between adjacent tube rows is 0.50 inch and the distance between adjacent columns is0.866 inch. There are 142 rows and 177 columns. The ends of each tube are hydraulically expandedin the tubesheet which is 27.95 inches thick. The tubes are supported by seven tri-foiled broached tubesupport plates (TSPs) in the straight legs and up to twelve anti-vibration bar (AVB) contact locations inthe U-bend. The AVBs are intended to provide tube support in the U-bend thereby preventing tubedamage due to vibration. They have a width of 0.59 inch and a thickness of 0.114 inch and are madefrom SA-479, Type 405 stainless steel. The TSPs are made from SA-240, Type 405 stainless steel andhave a thickness of 1.38 inches. There are a total of 48 stay rods in the tube bundle arranged in twoapproximate circles around the center line of the SG. The stay rods are distributed equally between thehot leg and the cold leg sides, with each pair replacing a tube from the bundle and occupying 24 tubelocations.The tube bundle wrapper has an inside diameter (ID) of 159.96 inches and a thickness of 0.47 inch.The lower shell has an ID of 166.54 inches and a thickness of 4.06 inches and extends approximately288.7 inches above the top of the tubesheet. The shell transition cone has a height of approximately77.5 inches and is located at the approximate elevation of the U-bend region. The upper shell has anID of 253.81 inches and a nominal thickness of 5.16 inches. The total height of the SG isapproximately 785.6 inches.The steam drum within the upper shell contains 38 primary separator risers arranged in threeconcentric circles and a single-tier secondary separator consisting of eight parallel banks of demister1814-AA086-M0238, REV. 0Page 8 of 415 Page 8 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013vanes. The feedwater (FW) distribution ring surrounds the outermost ring of primary separator risersand is located close to the top of the transition cone. The FW distribution ring is connected to the FWnozzle located in the upper shell near its bottom. The steam nozzle is located in the center of theelliptical head at the top of the SG.1.2 Degradation Modes AddressedThe focus of the evaluation described in this report was the tube wear indications in the U-bend regionof the SG. These indications included tube wear at AVB locations and tube-to-tube wear in the U-bendfree span between the AVBs. In addition, the potential for in-plane vibration that can lead to tube-to-tube wear as observed in the Unit 3 SGs was addressed. Thus the degradation modes leading to theflaw indications included tube wear resulting from the interaction of the tubes with the AVBs and fromthe interaction of the tubes with one another. These are the only degradation mechanisms covered bythis analysis. Indications reported at the retainer bars or in other (than U-bend) regions of the SG arenot addressed in this report.1.3 Summary of Operation and Inspection PlanThe SG inspection at the end of Cycle 16 (2C16) was conducted in 2012. This was the first in-serviceinspection of the RSGs. The Unit 2 RSGs had accumulated an operating duration of 20.6 effective fullpower months (EFPM) during Cycle 16 operation.Southern California Edison (SCE) is planning to perform a mid-cycle inspection of the SGs afteroperating less than 6 months in the next fuel cycle (Cycle 17). Hence a conservative value of 6 EFPMwas used as the operating length until the next inspection. However, additional analysis was alsoperformed tht demonstrated acceptable operation for at least 18 months.1.4 Description of MethodologyThe methodology used to evaluate the steam generators at SONGS Unit 2 involves many steps. Thesesteps are outlined in Figure 1-1. The following discussions will describe the methodology used to showthat the SONGS Unit 2 steam generators will be acceptable for continued operation at a reduced powerlevel.The first step in the evaluation is to identify the 100% power operating conditions that the SONGS Unit2 steam generators were operated at during Cycle 16. These operating conditions are then input intoan ATHOS thermal-hydraulic evaluation of the steam generators. This analysis is described andsummarized in Section 3.0.The second step in the evaluation is to perform the flow-induced vibration (FIV) evaluation of theSONGS Unit 2 steam generators using the ATHOS thermal-hydraulic (TH) data for the 100% powerlevel condition. This evaluation is performed using the FASTVIB computer code which evaluates up to25 tube rows in a single evaluation. The FIV evaluation of the SONGS Unit 2 tube bundles is evaluatedfor a total of 79 different AVB support conditions in the U-bend region of the tube bundle. Thesesupport cases assume that the gap between the AVB and the tube is sufficiently large such that theAVB is assumed to be ineffective. The details of the FIV evaluation as well as a summary of results aredescribed in Section 4.0 of this report.1814-AA086-M0238, REV. 0Page 9 of 415 Page 9 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013In conjunction with the thermal-hydraulic analysis and the FIV analysis, a review of the bobbin coil andthe RPC eddy current data was performed. The review of this data is performed to determine AVBsupport locations that have indications of tube wear at the AVB location. The RPC data is specificallyinterrogated to determine if any tubes have low level wear that would not be detectable in the bobbincoil data. Wear at the AVB sites can be an indication of a gap larger than the design condition betweenthe tube and the AVB support. The eddy current wear data is then reviewed and tubes that have wearscars larger than 20% through-wall were selected as limiting tubes to be considered in the subsequentwear evaluations. The limiting tubes were then assigned a support case from the FIV evaluation tocorrelate the AVBs showing wear in the eddy current data, to ineffective supports in the FIV evaluation.The results of the eddy current data review are shown in Section 5.0 of this report. A discussion of thelimiting tubes considered in the wear evaluation, as well as the support condition assigned to thelimiting tube, is provided in Section 6.0.Using the limiting tubes identified from the eddy current data, a wear model was developed for eachlimiting tube. The wear model requires input such as the tube excitation ratio and the active modeshapes from the FIV evaluation. This data is obtained for each of the base support cases and alternatesupport cases for all of the limiting tubes from the FIV evaluation. The wear model was then tuned byassuming AVB support conditions to closely match the wear data obtained from the eddy currentinspection data obtained at the end of operating Cycle 16. The tuned wear model for the limiting tubescan be used to predict future wear for the next cycle at 100% power or at a reduced power level. Thedetails of the wear evaluations are provided in Section 7.0.In addition to the evaluation for the 100% power level, an evaluation was performed for several reducedpower levels with emphasis on the 80% and 70% power levels. These reduced power level evaluationsconsidered the effects of tubes that have already been plugged so that the evaluation considers thespecific operating condition of the tube bundles for the next operating cycle. An ATHOS thermal-hydraulic evaluation, as well as FASTVIB FIV evaluation for all 79 support cases, was performed for thereduced power level conditions. The thermal-hydraulic evaluation for the reduced power level isdocumented in Section 3.2 and the FIV evaluation at reduced power level is documented inSection 4.5. The FIV evaluation is then input into the wear model to determine the amount of predictedtube wear possible during the next cycle of operation at a reduced power level. This wear calculationwas necessary for several reasons. Any tubes exhibiting tube wear predictions that would exceed thetube performance criteria would be plugged for the next operating cycle. The wear calculation was alsoperformed to determine the likelihood of any changes that could affect the tubes' boundary or supportcondition over the next operating period.In addition to the tube wear evaluation, stability ratios for the limiting tubes were tabulated at thereduced power level. Any tubes that are expected to have an in-plane stability ratio above 1.0 at thereduced power level would then be recommended for removal from service. The wear projection forthe reduced power level is documented in Section 7.3 and a discussion of in-plane instability in Unit 2 isshown in Section 8.0.The eddy current data for the SONGS Unit 3 steam generators was also reviewed to determine if themuch more severe tube wear that was experienced in the Unit 3 steam generators could influence theapproach used in Unit 2. Tubes with tube-to-tube wear were evaluated, as well as neighboring tubesand other limiting tubes with large amounts of AVB wear. Tubes that were specifically of interest weretubes that have tube-to-tube wear and have AVB wear at a limited number of AVB locations. The1814-AA086-M0238, REV. 0Page 10 of 415 Page 10 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013review of the data can be found in Section 5.4. The ATHOS thermal-hydraulic evaluation wasperformed for the Unit 3 specific operating parameters and the 79 FASTVIB AVB support cases weregenerated. The results of the Unit 3 specific ATHOS evaluation can be found in Section 3.4 and theresults of the FASTVIB FIV evaluation can be found in Section 4.6. The limiting tubes were thenreviewed and in-plane stability ratios were tabulated to determine if all of the tubes that have tube-to-tube wear could be explained by an in-plane stability ratio above 1.0 or a neighboring tube that isunstable in-plane. Based on this review of the Unit 3 data, a set of criteria was developed to determineif any tube in Unit 2 should be plugged based on the observations from Unit 3. The review of the Unit 3data and the development of the plugging criteria are documented in Section 9.0 of this report.Section 10.0 contains recommendations for continued operation of the SONGS Unit 2 steamgenerators at a reduced power level.1814-AA086-M0238, REV. 0Page 11 of 415 Page 11 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013cFigure 1-1Methodology Outline1814-AA086-M0238, REV. 0Page 12 of 415 Page 12 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20132.0 SummarylConclusionsCalculations and analysis have been performed to evaluate the potential for additional unacceptabletube vibration and wear in the SONGS Unit 2 steam generators. The analysis considered variousaspects including:* Thermal-hydraulic analysis" Flow-induced vibration analysis considering past operation and future operation at various powerlevels* Analysis of available eddy current data collected using both bobbin and RPC* Wear projection analysis for future operation based upon prior wear and operating experience* Evaluation of tube wear observed in Unit 3 and modification of methods used to determineacceptability of the Unit 2 tubes left in serviceThe following is a summary of the results obtained as a result of this process. Additional detailregarding these and other aspects of the analysis performed in support of this work can be found in thebody of this document.The term 'W1uidelastic instability' or "unstable tubes'; is used in this report and relatesto movement in either the out-of-plane direction or the in-plane direction. When it isused in the discussion of movement in the out-of-plane direction, it should be notedthat the tube is not considered to be "unstable" in the classical sense, wheredisplacements can increase significantly with small increases in U-bend velocity. Thisclassical displacement cannot happen in the U-bend as the tubes would close thegaps between AVBs and prevent large displacements. Instead, calculation of theexcitation ratio (ER) in the out-of-plane direction is necessary and is an importantparameter that is used in calculating future tube wear. Calculating this value does notimply that the tube is experiencing large unbounded displacements. The use of theterms "effective" or "ineffective" in this report also have a specific limited meaningrelated to whether the tube/support intersection is acting as a pinned support with nogap or as an otherwise active support with gaps that allow gap-limited fluidelasticrattling within the clearance. This is different than terminology often used when usingnon-linear methodology to evaluate interactions within loose supports.2.1 FIV Results SummaryThe flow-induced vibration analysis (FIV) has been performed using the FLOVIB and FASTVIBcomputer codes using thermal-hydraulic data developed with the ATHOS computer code. Detailsregarding the actual FIV analysis can be found in Section 4.0 of this report. Section 3.0 contains detailsof the thermal-hydraulic analysis performed for the SONGS Unit 2 and Unit 3 SGs. Fluidelastic stabilityratios and excitation ratios were calculated for the in-plane and out-of-plane directions, respectively, forvarious boundary conditions. This was performed for various assumed power levels with results usedin subsequent analysis. The following is a summary of the pertinent results found during the FIVanalysis of Unit 2.1814-AA086-M0238, REV. 0Page 13 of 415 Page 13 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20132.1.1 Out-of-PlaneAnalysis indicates that if all AVBs were effective, or if one AVB was ineffective, all tubes would bestable with respect to out-of-plane fluidelastic tube excitation for the 100% power condition. Asindicated earlier, out-of-plane excitation ratios calculated for the U-bend that are greater than 1.0 arenot considered to be "unstable" in the classical sense. The only time where this would be considered toactually result in an unstable tube is if an excitation ratio greater than 1.0 was calculated for thecondition where all supports were active. If this were the case, then the tube would not have an AVB tocontact during vibration, and would hit neighboring tubes instead.In some cases [ ]8,c or more ineffective AVBs were necessary to create a condition where theexcitation ratio would be greater than 1.0. However, as has been observed during the recentinspection, there were multiple tubes found with larger than anticipated wear at the AVB support sites.This is an indication of ineffective AVBs which, when combined with certain secondary side fluidconditions, can result in tube wear. FIV analysis has been performed for many different possible AVBsupport configurations. A library of 78 possible configurations (79 including the base case: all AVBseffective) was developed where essentially all tubes in the SG were evaluated for the defined supportcondition. Using this library of ER results, coupled with eddy current defined support conditions, it waspossible to develop the inputs necessary to prepare estimates of future wear that could occur duringthe next cycle of operation.2.1.2 In-PlaneIn addition to the out-of-plane analysis, an analysis of the potential for in-plane instability was alsoperformed. Eddy current inspection results were used to define the support condition and the potentialfor in-plane instability determined for the limiting active tubes. The analysis determined that therewould not be any in-plane instability for any of these active tubes using the support conditions definedby eddy current. It was noted that at operation at 70% power, the in-plane instability value dropped byabout [ ]ac of the value at 100% power.2.2 Wear Analysis Summary2.2.1 Tube Wear SummaryWestinghouse testing and consistent design methodology supports the conclusion that tube/AVB wearthat could approach plugging margins within one operational cycle is caused by an amplitude or gap-limited ER mechanism within larger than expected clearances.. Section 7.2 provides a description ofthis mechanism and how it is incorporated into evaluation of tube/TSP wear. Application of the semi-empirical methodology to obtain observed wear patterns in the SONGS Unit 2 steam generatorsdemonstrates that subsequent operation at any part load levels at 80% or below will not lead tounacceptable tube wear during the next operating cycle before a planned interim ISI. Note that thismethodology uses the gap-limited ER mechanism to match the observed tube wear at the threeconsecutive AVBs having the limiting %TW wear depth at the end of the first cycle of operation. Theamount of work (workrate x time) required to produce the observed wear, and the observed depths ofwear, are essentially independent of the mechanism assumed to produce the starting point for theprojections made for different operating load levels. Projections of future wear from the actual existingconditions using the gap-limited mechanism should be conservative for other mechanisms that assumethe wear could have significant contributions from flow turbulence since excitation from the gap-limited1814-AA086-M0238, REV. 0Page 14 of 415 Page 14 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013ER mechanism increases with wear, whereas excitation due to turbulence does not1.2.2.2 A VB Wear PotentialThe methodology used to evaluate maximum tube/AVB wear potential simultaneously calculates theconformal wear in [ ]ax. Results documented in this report have used input wearcoefficients that maximize tube wear and minimize AVB wear. The reverse could be done, or any othercombination of relative wear could be prescribed. In typical design calculations based on experiencewith Westinghouse AVB material and processing history,IacOn the other hand, there is a potential that AVBs can vibrate and cause tube wear if long, unsupportedspans are created inside the bundle. The SCE root cause evaluation concluded there was noindication of AVBs vibrating and causing tube wear. However, there are several instances of AVBshaving 15 or more consecutive tubes in a column with wear indications, so additional review of allavailable ECT data including any RPC evidence was performed. Based on the additional evaluationdescribed in Section 7.4.2, AVBs are not likely responding in any kind of aerodynamically unstablemode, but they are likely vibrating as a response to flow turbulence in the regions having manyconsecutive intersections with significant tube wear. This provides additional sliding motions duringimpacting due to gap-limited ER excitation that exceeds levels included in the baseline shaker tests.However, the process of matching the observed wear as a starting point for projections as described inSection 7.2.4 would account for this potential by choosing a set of parameters that produced workratesrequired to produce the observed result.2.3 Potential for In-Plane Tube-to-Tube Contact and In-Plane InstabilityIndications of tube-to-tube wear were found on two tubes, Ri 1 1C81 and R1 13C81 in SG 2E089. Theindications on these tubes were located at the same free span location in the U-bend and wereconsidered to be a result of contact between these two tubes. This was the only tube pair that wasfound with this kind of indication in the Unit 2 steam generators. Initially there was consideration giventhat this tube-to-tube contact was a direct result of in-plane motion resulting from in-plane instability.However, the analysis that was performed and documented in Section 7.5 and Appendix B determinedthat the tube wear at this location was most likely a result of the close proximity of these two tubes.This proximity was initially believed to be initiated during assembly of the steam generator and mayhave been exacerbated during operation of the SG as a result of SG temperature and pressurechanges. Since there is only a limited amount of interference possible, the tubes would wear until thetubes are no longer in contact and will cease wearing. This condition is called 'wear arrest' and isapplicable to Tubes RI 11 C81 and R1 13C81 in SG 2E089. However, a more detailed review of theavailable eddy current data contained in Appendix B suggests that the tubes were initially in contact asa result of conditions associated with SG manufacturing and then became worn due to FIV. After aperiod of operation the tube became displaced, or skipped to a new location, and tube-to-tube wearNote that the rate of increasing wear depth still tends to decrease with continued operation as a result of thedepth-volume relationship and sharing of energy among all affected intersections.1814-AA086-M0238, REV. 0Page 15 of 415 Page 15 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013stopped. The skip has been identified through review of the available eddy current information and isdiscussed in detail in Appendix B.The review of the Unit 3 eddy current data was useful in that it helped establish criteria that woulddetermine if any additional tubes beyond those already plugged tubes should be removed from serviceto preclude the potential for vibration in the in-plane direction which could result in tube-to-tube contact.One feature that was noted for all of the tubes with free span wear in the Unit 3 tube sample was thepresence of wear at the top TSP. All tubes that had free span wear also had indications of top TSPwear, or were in contact with tubes that had top TSP wear. It is notable that neither of these two tubeshad this feature. Since this feature was not found, it would also support the conclusion that these tubeswere not moving in the in-plane direction.Additional analysis was performed to determine the potential for in-plane motion associated with fluid-elastic instability in any of the remaining active tubes. This is documented in Section 8.1 and Section7.3.4 of this report. Through analysis of the available eddy current data, it was determined that therewere no indications of in-plane motion in any of the tubes. This also included the tubes with tube-to-tube wear as discussed earlier. This conclusion was made by reviewing the wear scars at the AVBsupport locations and determining that there was no wear outside the location where the tube wassupported by the AVB. This is a clear indication that in-plane motion was not occurring; else therewould be indications of rubbing/wear at locations not covered by the AVB. Since the SGs will operateat reduced power levels during the next period of operation, and any potential for wear is reduced atlower power levels, the likelihood of any in-plane motion is greatly reduced. As an order of magnitude,calculations indicate that a reduction from 100% power to 70% power will reduce the in-plane stabilityratios by about one-half the values calculated at 100% power conditions.As a result of the above, it was concluded that significant tube-to-tube wear would not be projected tooccur during the next cycle of operation of Unit 2.2.4 Modification of Plugging Criteria Considering Unit 3 DataThe Unit 3 eddy current data was reviewed to determine if any additional information could be obtainedthat would allow definition of a more conservative approach that could be used to justify the remainingactive tubes in the Unit 2 steam generators. As a result of this process the following criteria weredeveloped:Criterion 1 -Free span tube-to-tube contact/wearCriterion 2 -Wear outside AVB sitesCriterion 3 -Ineffective AVB sites and in-plane motionCriterion 4 -Wear at top TSP in combination with wear at multiple AVBsCriterion 5 -Ineffective AVBs and OP wear potentialSpecific details describing the above criteria can be found in Section 9.0 of this report. With theexception of Criterion 4, the application of the above criteria for the Unit 2 tubes did not result inadditional tubes recommended for plugging. However, application of the more conservative criteriaresulted in the identification of additional tubes that would be recommended for plugging at variouspower levels. Table 2-1 provides a summary of the tubes.1814-AA086-M0238, REV. 0Page 16 of 415 Page 16 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20132.5 Summary and RecommendationsAnalysis has shown that the wear observed at the AVB locations in the SONGS Unit 2 steamgenerators were produced as a result of out-of-plane motion associated with the gap-limited ERmechanism. There were no indications of in-plane instability, even for the tubes found with tube-to-tubewear. All tube wear at AVB locations was found to be consistent with an out-of-plane mechanism.The wear analysis indicates that SCE can operate the SONGS Unit 2 steam generators withoutsignificant additional tube wear at power levels of at least 80% at the current plugging level. Theanalysis has determined that no tubes were found to be unstable in the in-plane direction. The gap-limited displacement ER mechanism will cause some of the tubes to experience additional wear overthe next period of operation. However, the amount of wear associated with that mechanism would bemanageable over that period of time with maximum additional wear on both active and plugged tubesexpected to be less than 1.5 mils. Note that operation of the steam generators with wear produced bythis mechanism is not uncommon in Westinghouse steam generators as long as the amount of wearthat could occur during operation is small (most often less than the ECT detection threshold).The amount of wear that has been experienced at the SONGS Unit 2 SGs during the prior operatingcycle is larger than what would normally be considered acceptable. As a result, certain actions havebeen taken by SCE to reduce the likelihood of a tube leakage event. This includes plugging andstabilizing certain tubes with large wear scars, including tubes with little or no wear in the affected zone.Westinghouse also recommends plugging up to 15 additional tubes as described in Table 2-1 as apreventive measure. In addition to these actions, Westinghouse recommends that SCE operate theSONGS Unit 2 SGs at a 70% power level for the next 6 month period. However, additional analysiswas also performed tht demonstrated acceptable operation for at least 18 months.1814-AA086-M0238, REV. 0Page 17 of 415 Page 17 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 2-1Tube Plugging RecommendationSteam Generator 2E088 Steam Generator 2E08980% Power 70% Power 80% Power 70% PowerRow Column Row Column Row Column Row Column113 81 135 93 80 68 80 68134 88 137 89 103 97 104 72135 91 104 72 132 94135 93 116 96137 89 120 96126 78132 94134 88134 92138 901814-AA086-M0238, REV. 0Page 18 of 415 Page 18 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20133.0 ATHOS AnalysisAn ATHOS model of the SONGS Unit 2, MHI SG Model 116TT-1, RSGs was developed to providethermal-hydraulic (TH) parameters using the Westinghouse version of the ATHOS code. TheWestinghouse version of the ATHOS code has modifications and upgrades described in Appendix B ofReference 3-1 and is the methodology used by Westinghouse for designing RSGs and SGs for newplants. The model is used to compute the three-dimensional (3-D) thermal-hydraulic parameters: voidfractions, quality, densities, and gap velocities for all tubes in the tube bundle. These parameters areused for flow-induced vibration (FIV) and wear evaluations of the Unit 2 RSGs to support theoperational assessment and restart efforts.a,b,c,e3.1 Analysis MethodsThe thermal-hydraulic analysis of the SONGS Unit 2 RSGs is performed using the ATHOS (Analysis ofthe Thermal Hydraulics of Steam Generators) code. ATHOS is a three-dimensional computational fluiddynamics (CFD) code for analyzing steam generator (SG) thermal-hydraulic performancecharacteristics (Reference 3-5). Westinghouse used the current version of the code, ATHOS60,Version 3.0, referred to as ATHOS in this report (References 3-6 through 3-8).ATHOS analysis of a SG involves the execution of a suite of codes consisting of the pre-processorsATHOGPP and PLATES, the ATHOS solver, and the post-processor VGUB. A brief overview of thesecodes follows.3.1.1 Description of Computer CodesATHOGPPThe pre-processor, ATHOGPP, calculates the geometric parameters required for the ATHOS thermal-hydraulic analysis. For each node the code computes: the secondary fluid volume, the flow areas inthe R, 0, and Z directions, the heat transfer and friction surface areas, the approach to device arearatios required to compute pressure drops through concentrated resistances (flow distribution and tubesupport plates, primary separator entrance, etc.), and the primary fluid flow partitioning factor. Theinput parameters include: grid distribution in R, 0, and Z directions, shell and shroud (wrapper)dimensions, tube layout and individual tube dimensions as well as the location (row and columnnumbers) of plugged tubes, inlet (feedwater) and primary separator locations and dimensions, as wellas the location of all internal devices (tube support plates, stay-cylinders, etc.). Geometry dataprocessed by ATHOGPP are then transferred via a binary file (TAPE20) to the PLATES code for furtherrefinement of the flow areas through the tube support plates.a,c,e1814-AA086-M0238, REV. 0Page 19 of 415 Page 19 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,ePLATES[]a,c,eATHOSThe ATHOS code module solves the governing conservation equations in conjunction with empiricalcorrelations and boundary conditions.a,c,e[a,b,c,eVGUBThe post-processor, VGUB, calculates tube gap velocity, density, and void fraction distributions alongthe steam generator tubes. These data are used in tube vibration and wear analyses. Local tube gap1814-AA086-M0238, REV. 0Page 20 of 415 Page 20 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013velocities are calculated from ATHOS cell velocities which are based on the porous media concept. Ingeneral, gap velocity components normal to the tube (cross flow) are used in flow-induced vibration andwear analyses since these components produce significantly greater tube vibration than componentsparallel to the tube (axial flow).a,c,e3.1.2 Discussion of Significant Assumptions1. Thermal-hydraulic conditions for ATHOS calculations are based on operating conditionsspecified in Reference 3-4.2. []a,c.e3.[I a,c,e4. [5.6.a,b,c,ea,b,c,eI a,c,e1814-AA086-M0238, REV. 0Page 21 of 415 Page 21 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20137.8.Ia,b,c,eI a,c,e3.1.3 Acceptance CriteriaThe ATHOS code calculations are acceptable if all of the following criteria are satisfied (References 3-5and 3-16). Note that if a criterion cannot be satisfied then sufficient justification is required.1. b,c,e2.a,b,c,e3. [I a,b,c,e4.[Ia,b,c,e3.1.4 InputSteam Generator GeometryThe ATHOS model covers the secondary side flow field inside the steam generator shell from the topsurface of the tubesheet to the lower deck plate and from the center of the wrapper-to-wrapper wall andthe downcomer annulus between the wrapper and the shell walls. The finite difference grid is based onthe cylindrical coordinate system. Design geometry and thermal-hydraulic symmetry is assumed withrespect to the diametrical plane perpendicular to the tube lane. Because of this assumption, theanalysis model consists of one-half of the steam generator, i.e., an 180'-sector encompassing one-halfof the hot leg side and one-half of the cold leg side.a,c,eThe ATHOS Geometry pre-processor also included the following inputs:1. General Geometrical Input Data2. Grid Specification Data1814-AA086-M0238, REV. 0Page 22 of 415 Page 22 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20133. Inlet/Outlet Port Data4. Shell and Shroud (Wrapper) Data5. Vertical Divider Plate and Impingement Plate Data6. Separator Deck Data7. Distribution Plate Data8. Tube Support Plate and Baffle (Wrapper) Data -Horizontal9. Tube Support Plate and Baffle (Wrapper) Data -Vertical10. Tube Bundle Data11. Primary Separator Lower Deck Plate Flow Areas12. Anti-Vibration Bar (AVB) Data13. Tube Plugging Dataa,b,c,eATHOS Thermal-Hydraulic ModuleATHOS inputs were prepared for the operating conditions specified in Reference 3-4.a,b,c,e1814-AA086-M0238, REV. 0Page 23 of 415 Page 23 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,c,e1814-AA086-M0238, REV. 0Page 24 of 415 Page 24 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-1SONGS Units 2 and 3 RSGs: R-0 Finite Difference GridIX Circumferential Grid Radial Grid (YV) at Radial Grid (YV)(XU) IY Tubesheet at Lower Deck a(Degrees) (inches) (inches)b,c,eI *4 4. 4-I -I

• 4-4 4

• I.-4 4

• 4-4 4

• I-4 4 4. 4.4 4 4. 4.I 4 4. I-__ _____ I __ I _____ _____-~ I & I1814-AA086-M0238, REV. 0Page 25 of 415 Page 25 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-2SONGS Units 2 and 3 RSGs: Axial Direction (Z) Finite Difference Grida,u,c,e1814-AA086-M0238, REV. 0Page 26 of 415 Page 26 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-3SONGS Unit 2 RSG 2E088 Tube Plugging List(Reference 3-3) a,b,e1814-AA086-M0238, REV. 0Page 27 of 415 Page 27 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-4SONGS Unit 2 RSG 2E089 Tube Plugging List(Reference 3-3) a,b,e1814-AA086-M0238, REV. 0Page 28 of 415 Page 28 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-5SONGS Unit 2 RSGs: Basic Operating Parameters(References 3-1 and 3-4)Parameter Value a,.... )b,et I

• I-* * -1814-AA086-M0238, REV. 0Page 29 of 415 Page 29 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,c,eFigure 3-1SONGS Units 2 and 3 RSGs: ATHOS Finite Difference Grid in the Horizontal (R-e) Plane1814-AA086-M0238, REV. 0Page 30 of 415 Page 30 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,bc,eFigure 3-2SONGS Units 2 and 3 RSGs: ATHOS Finite Difference Grid in the Vertical (R-0) Plane1814-AA086-M0238, REV. 0Page 31 of 415 Page 31 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20133.2 Power LevelsThe ATHOS family of codes, consisting of the pre-processors ATHOGPP and PLATES, the ATHOSthermal-hydraulic module, and the post-processor VGUB, were executed to determine the thermal-hydraulic characteristics of the SONGS Unit 2 RSGs for the operating conditions specified inReference 3-4. [a,b,c,e3.3 Results SummaryIa,b,c,e1814-AA086-M0238, REV. 0Page 32 of 415 Page 32 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,c,eLocal Flow Conditions along TubesVGUB (Reference 3-15) calculates the local flow conditions for all tubes in the bundle for input to thetube vibration and wear analysis to support the operational assessment of the Unit 2 RSGs. Local tubegap velocities are calculated from ATHOS cell velocities based on the cell porosity and thecharacteristic geometry of the tube array (pitch and diameter). Output from VGUB is written to a binary1814-AA086-M0238, REV. 0Page 33 of 415 Page 33 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013file (TAPE7) which contains local flow conditions for all tubes in the bundle. TAPE7 binary file is usedfor tube vibration and wear evaluations.a,b,c,e1814-AA086-M0238, REV. 0Page 34 of 415 Page 34 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-6Summary of ATHOS Convergence Parametersa,b,cII,IIi£00~iE~ii'.jII~'Iiiai~i'p0iii£I2'inI-jI~231814-AA086-M0238, REV. 0Page 35 of 415 Page 35 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-7Summary of ATHOS Convergence Parameters at 100% Power(Reference 3-1)Parameter Target Initial Run Restart 1 Restart 2 CommentValuesb,c11814-AA086-M0238, REV. 0Page 36 of 415 Page 36 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-SSummary of ATHOS Resultsji1814-AA086-M0238, REV. 0Page 37 of 415 Page 37 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 3-3SONGS RSG 2E089 Tube Row 141/Col. 89: Comparison of Gap Velocities at 50% Power1814-AA086-M0238, REV. 0Page 38 of 415 Page 38 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,b,cFigure 3-4SONGS RSG 2E089 Tube Row 141/Col. 89: Comparison of Gap Velocities at 60% Power1814-AA086-M0238, REV. 0Page 39 of 415 Page 39 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 3-5SONGS RSG 2E088 Tube Row 141/Col. 89: Comparison of Gap Velocities at 70% Power1814-AA086-M0238, REV. 0Page 40 of 415 Page 40 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 3-6SONGS RSG 2E089 Tube Row 1411Col. 89: Comparison of Gap Velocities at 70% Power1814-AA086-M0238, REV. 0Page 41 of 415 Page 41 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,b,cFigure 3-7SONGS RSG 2E089 Tube Row 141/Co1. 89: Comparison of Gap Velocities at 80% Power1814-AA086-M0238, REV. 0Page 42 of 415 Page 42 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 3-8SONGS RSG89 High Column ATHOS Results of Velocity, Void and Quality at 50% Power1814-AA086-M0238, REV. 0Page 43 of 415 Page 43 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,b,cFigure 3-9SONGS RSG89 High Column ATHOS Results of Velocity, Void and Quality at 60% Power1814-AA086-M0238, REV. 0Page 44 of 415 Page 44 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 abcFigure 3-10SONGS RSG89 High Column ATHOS Results of Velocity, Void and Quality at 70% Power1814-AA086-M0238, REV. 0Page 45 of 415 Page 45 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 abcFigure 3-11SONGS RSG89 High Column ATHOS Results of Velocity, Void and Quality at 80% Power1814-AA086-M0238, REV. 0Page 46 of 415 Page 46 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20133.4 Unit 3 Operating ConditionsIn this section, the ATHOS analysis of the Unit 3 RSGs at the representative operating conditions, fromReference 3-17, for the February 2011 through January 2012 operating period is compared with theATHOS analysis documented in Section 3.3. These additional evaluations were performed anddocumented in Reference 3-18 to demonstrate the applicability of Westinghouse methodology to themore severe conditions observed in Unit 3.a,b,c,e1814-AA086-M0238, REV. 0Page 47 of 415 Page 47 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,bc,eLocal Flow Conditions alona Tubes[Ia,b,c,e1814-AA086-M0238, REV. 0Page 48 of 415 Page 48 of 414LTR-SGDA-1 2-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-9Unit 3 RSGs: Primary and Secondary Fluid Parameters forFebruary 2011 through January 2012 Operating PeriodParaete RS3E88RSGE89 Design ConditionsParaete RS3EB8RSGE89(Reference 3-1)a,b,c__1-I-I_4 I4 I1814-AA086-M0238, REV. 0Page 49 of 415 Page 49 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-10Summary of ATHOS Convergence ParametersParameter Target Initial Restart I Restart 2 CommentValues Runb,cI1I i1814-AA086-M0238, REV. 0Page 50 of 415 Page 50 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 3-11Summary of ATHOS ResultsParameter Design Condtions Operating CondtionsI (Reference 3-1) Unit 3 Plant Dataa,b,ct* 4.4. 4.4.44. 4.4. 1.4. 4.4. 4.I. I.4. 4.4. 4.U. I1814-AA086-M0238, REV. 0Page 51 of 415 Page 51 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 3-12Secondary Quality Contours along the Plane of Symmetry (IX = 1 and 30)1814-AA086-M0238, REV. 0Page 52 of 415 Page 52 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 3-13Void Fraction Contours along the Plane of Symmetry (IX = I and 30)1814-AA086-M0238, REV. 0Page 53 of 415 Page 53 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 3-14Secondary Fluid Velocity Contours along the Plane of Symmetry (IX = 1 and 30)1814-AA086-M0238, REV. 0Page 54 of 415 Page 54 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 3-15Secondary Fluid Quality Contours above 7th Tube Support Plate (IZ=36)1814-AA086-M0238, REV. 0Page 55 of 415 Page 55 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 3-16Void Fraction Contours above 7th Tube Support Plate (IZ=36)1814-AA086-M0238, REV. 0Page 56 of 415 Page 56 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 3-17Secondary Fluid Quality Contours at the Plane of Maximum Quality (IZ=45)a,b,c1814-AA086-M0238, REV. 0Page 57 of 415 Page 57 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 3-18Void Fraction Contours at the Plane of Maximum Quality (IZ=45)a,b,c1814-AA086-M0238, REV. 0Page 58 of 415 Page 58 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,b,c)Figure 3-19Tube Row 141/Co1. 89: Comparison of Gap Velocities at Unit 3 and Design Conditions1814-AA086-M0238, REV. 0Page 59 of 415 Page 59 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,b,cFigure 3-20Tube Row 141/Col. 89: Comparison of Void Fractions at Unit 3 and Design Conditions1814-AA086-M0238, REV. 0Page 60 of 415 Page 60 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 abcFigure 3-21Tube Row 141/Co1. 89: Comparison of Fluid Mixture Densities at Unit 3 and Design Conditions1814-AA086-M0238, REV. 0Page 61 of 415 Page 61 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20133.5 References3-1. CN-SGMP-12-13, Revision 1, "Thermal-Hydraulic Analysis of the San Onofre NuclearGenerating Station Units 2 and 3 Replacement Steam Generators," September 2012.3-2. CN-SGMP-12-15, Revision 2, "Thermal-Hydraulic Analysis of the SONGS Unit 2 RSGs at PartLoad Conditions to Support Operational Assessment," September 2012.3-3. E-mail from David Calhoun (Southern California Edison) to Daniel Merkovsky (Westinghouse),Subject: "New SONGS Schedule Item for Westinghouse," May 22, 2012, (Included in AppendixA of Reference 3-2).3-4. MHI Report, L5-04GA567, Rev. 4, "San Onofre Nuclear Generating Station, Units 2 & 3Replacement Steam Generators Evaluation of Stability Ratio for Return to Service," July 21,2012.3-5. EPRI-NP-4604-CMM, "ATHOS3: A Computer Program for the Thermal-Hydraulic Analysis ofSteam Generators," July 1986.3-6. LTR-SGDA-08-148, "Software Release Letter for Modules of the ATHOS Family of Codes andExecutable Scripts: GPP60 Version 4.0, RUNATHOGPP Version 1.4, PLATES60 Version 3.0,and RUNPLATES Version 1.4," June 13, 2008.3-7. LTR-NCE-07-48, "Software Release Letter for ATHOS Codes and Scripts GPP60 Revision 3.0,RUNATHOGPP Version 1.3, ATHOS60 Version 3.0, and RUNATHOS Version 1.3," April 2,2007.3-8. LTR-SGDA-05-63, "Software Release Letter for Specific ATHOS Family Codes: SoftwareChanges Specification and Validation for Version 4.0 of Codes PLTATHOS and VGUB on HP-UX 11.0," March 24, 2005.3-9. LTR-NCE-08-1 1, Rev. 1, "User's Manual for the Newly Added Features to ATHOGPP Version3.0 and PLATES Version 2.0 Computer Codes," February 29, 2008.3-10. WNEP-9639, Rev. 1, "Modification and Qualification of ATHOGPP Code to Simulate AVBs forATHOS Analysis," October 20, 1996.3-11. CN-SGMP-12-12, Rev. 1, "Software Changes to ATHOGPP for Modeling of SONGS RSG Units2 and 3 Anti-vibration Bars," June, 2012.3-12. WNEP-9640, Rev. 1, "PLATES Code User's Manual (Feedring Design Version of PLATES),"October 20, 1996.3-13. MHI Report, L5-04GA510, Rev. 5, "San Onofre Nuclear Generating Station, Units 2 & 3Replacement Steam Generators Thermal and Hydraulic Parametric Calculations," November12, 2008.3-14. LTR-NCE-04-105, "User's Manual for the Version 4.0 of PLTATHOS and VGUB to Read SGModel Data at Execution Time," February 11, 2005.3-15. WNEP-9642, Rev. 1, "VGUB Code User's Manual STD-UM-87-00003090," October 1, 1996.3-16. LTR-NCE-08-26, Rev. 1, "Guideline on Convergence Parameters Affecting ATHOS3 Solution,"May 13, 2008.1814-AA086-M0238, REV. 0Page 62 of 415 Page 62 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20133-17. E-mail from Brian Sarno (Southern California Edison) to Damian A. Testa (Westinghouse),Subject: "SONGS Operating Conditions," March 16, 2012, (Included in Appendix A of Reference3-18).3-18. CN-SGMP-12-17, Revision 2, "Thermal-Hydraulic Analysis of the SONGS Unit 3 ReplacementSteam Generators for the February 2011 through January 2012 Operating Period," September2012.1814-AA086-M0238, REV. 0Page 63 of 415 Page 63 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.0 Flow-Induced Vibration Analysis4.1 FIV IntroductionFlow-induced vibration models of the SONGs MHI replacement steam generators weredeveloped to evaluate the effects of secondary side flow on the tubes. The FIV models includedthe 7 tube support plates along with the 6 anti-vibration bars, which provide support to the tubeat up to 12 locations. Figure 4-1 contains a representative sketch of the model used in theanalysis. Table 4-1 contains a listing of the various cases considered with respect to theboundary conditions at the AVB that were imposed on the model. Figure 4-2 contains thedescription of the AVB numbering system used in this analysis. The FIV analysis wasperformed with the FASTVIB and FLOVIB computer codes using thermal-hydraulic inputdeveloped using the ATHOS computer code. The post-processor that interpolates tube-specificgap velocities from the ATHOS volumetric output recognizes the actual boundary conditionsaround the periphery of the bundle, therefore gap velocities for tubes in Row 142 are not aslarge as for tubes in Row 141. This effect can be observed in the figures contained in Section4.3 where the outermost tubes have slightly lower tube excitation ratios than the neighboring in-board tube. FASTVIB calculates relevant FIV responses for all tubes in a given row, and as canbe observed in Section 4.3, multiple rows are considered. The result is a 'tubesheet' map ofresponses that help to identify regions that are more susceptible to FIV for a given supportcondition.There are several tasks to be completed with respect to the FIV evaluation. The first task is todevelop tube excitation information for power levels of 100%, 80%, 70%, 60% and 50%. Thenext task is to provide the input necessary to complete the wear evaluations for the tubes ofinterest specified in Section 6 of this report. In addition to these tasks, there was also acomparative study performed to determine the impact on the FIV response as a result ofplugging a tube and whether or not the plugged tube contained a stabilizer. Anothercomparison was performed to determine the difference between the 2E088 and 2E089 steamgenerators as well as low column tubes and the high column tubes (symmetry concerns).Tubes that were plugged in the steam generators were not symmetrical about the center columnof the tube bundle and the same tubes were not plugged in both steam generators. As a result,potentially different thermal-hydraulic conditions could exist. The purpose of this comparisonwas to determine the impact that non-uniform plugging has on the FIV evaluations.1814-AA086-M0238, REV. 0Page 64 of 415 Page 64 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1Possible AVB Support Cases with Adjacent Missing AVBsFASTVIB -FLOVIB Case DescriptionsAVB NumberAllCase0 0 Supported Group1 Rows 48 to 142 1 2 3 4 5 6 7 8 9 10 11 12Group 2 Rows 27to 47 1 2 3 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. noa 9 n.a n.a. 12AVB 1Case1 1 Missing Group1 Rows 48 to 142 X 2 3 4 5 6 7 8 9 10 11 12Group 2 Rows 27to47 X 2 3 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 X n.a n~a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 X n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 2Case2 1 Missing Group1 Rows 48 to 142 1 X 3 4 5 6 7 8 9 10 11 12Group 2 Rows 27to47 1 X 3 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 3Case3 1 Missing Group1 Rows 48 to 142 1 2 X 4 5 6 7 8 9 10 11 12Group 2 Rows 27to47 1 2 X 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 4Case4 1 Missing Group1 Rows 48 to 142 1 2 3 X 5 6 7 8 9 10 11 12Group 2 Rows 27to47 1 2 3 X 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n~a n.a. n.a 9 n.a n.a. 12AVB 5Case5 1 Missing GroupI Rows 48 to 142 1 2 3 4 X 6 7 8 9 10 11 12Group2 Rows 27to47 1 2 3 4 X n~a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 naa na n.a. n.a 9 n. n.a. 121814-AA086-M0238, REV. 0Page 65 of 415 Page 65 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 6Case6 1 Missing Group1 Rows 48 to 142 1 2 3 4 5 X 7 8 9 10 11 12Group2 Rows 27to47 1 2 3 4 5 n~a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n~a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 7Case7 1 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 X 8 9 10 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n~a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n~a n.a. n.a 9 n.a n.a. 12AVB 8Case8 1 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 X 9 10 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a na. X 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 9Case9 1 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 8 X 10 11 12Group2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 X 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n~a n.a. 12AVB 10Case 10 1 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 8 9 X 11 12Group2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 9 X 11 12Group 3 Rows 15to26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a nma n.a. n.a 9 n.a n.a. 12AVB 11Case 11 1 Missing Group1 Rows48to142 1 2 3 4 5 6 7 8 9 10 X 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 9 10 X 12Group 3 Rows 15to 26 1 n.a n.a 4 5 n.a n~a. 8 9 nma n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 121814-AA086-M0238, REV. 0Page 66 of 415 Page 66 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 12Case 12 1 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 8 9 10 11 XGroup2 Rows 27 to 47 1 2 3 4 5 n.a n.a. 8 9 10 11 XGroup 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. XGroup 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. XAVB 1, 2Case 13 2 Missing Group1 Rows 48 to 142 X X 3 4 5 6 7 8 9 10 11 12Group 2 Rows 27to47 X X 3 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 X n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1to 14 X n.a n.a 4 n.a na n.a. n.a 9 n.a n.a. 12AVB 2, 3Case 14 2 Missing Group1 Rows 48 to 142 1 X X 4 5 6 7 8 9 10 11 12Group 2 Rows 27to47 1 X X 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 3, 4Case 15 2 Missing Group1 Rows 48 to 142 1 2 X X 5 6 7 8 9 10 11 12Group 2 Rows 27to47 1 2 X X 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 4,5Case 16 2 Missing Group1 Rows 48 to 142 1 2 3 X X 6 7 8 9 10 11 12Group 2 Rows 27to47 1 2 3 X X n.a n.a. 8 9 10 11 12Group 3 Rows 15to26 1 n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 5, 6Case 17 2 Missing Group1 Rows48to142 1 2 3 4 X X 7 8 9 10 11 12Group 2 Rows 27 to47 1 2 3 4 X n.a n.a. 8 9 10 11 12Group 3 Rows 15to 26 1 n.a n.a 4 X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12I ________L......I _________ ________ __________I1814-AA086-M0238, REV. 0Page 67 of 415 Page 67 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 6, 7Case 18 2 Missing Group1 Rows 48 to 142 1 2 3 4 5 X X 8 9 10 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 7, 8Case 19 2 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 X X 9 10 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X 9 n.a n.a. 12Group 4 Rows 1to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 8, 9Case 20 2 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 X X 10 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X X 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 9, 10Case 21 2 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 8 X X 11 12Group2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 X X 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 10, 11Case 22 2 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 8 9 X X 12Group2 Rows27to47 1 2 3 4 5 n.a n.a. 8 9 X X 12Group 3 Rows 15to26 1 n.a n.a 4 5 n.a na. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 11, 12Case 23 2 Missing Group1 Rows48to142 1 2 3 4 5 6 7 8 9 10 X XGroup2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 9 10 X XGroup 3 Rows 15to26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. XGroup 4 Rows 1 to 14 1 n.a noa 4 n~a n.a n.a. n.a 9 n.a n.a. X1814-AA086-M0238, REV. 0Page 68 of 415 Page 68 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 1, 2, 3Case 24 3 Missing Group1 Rows 48 to 142 X X X 4 5 6 7 8 9 10 11 12Group 2 Rows 27to47 X X X 4 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15to26 X n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 X n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 2, 3, 4Case 25 3 Missing Group1 Rows48to142 1 X X X 5 6 7 8 9 10 11 12Group 2 Rows 27to47 1 X X X 5 na n.a. 8 9 10 11 12Group 3 Rows 15to26 1 n.a n.a X 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 3, 4, 5Case 26 3 Missing Group1 Rows 48 to 142 1 2 X X X 6 7 8 9 10 11 12Group2 Rows27to47 1 2 X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15to26 1 n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows Ito 14 1 n.a n.a X n~a n.a n.a. n.a 9 n.a n.a. 12AVB 4, 5, 6Case 27 3 Missing Group1 Rows 48 to 142 1 2 3 X X X 7 8 9 10 11 12Group 2 Rows27to47 1 2 3 X X n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n~a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. nma 9 n.a n.a. 12AVB 5, 6, 7Case 28 3 Missing Group I Rows 48 to 142 1 2 3 4 X X X 8 9 10 11 12Group 2 Rows 27to47 1 2 3 4 X n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 6, 7, 8Case 29 3 Missing Group1 Rows 48 to 142 1 2 3 4 5 X X X 9 10 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 121814-AA086-M0238, REV. 0Page 69 of 415 Page 69 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 7, 8, 9Case 30 3 Missing Group I Rows 48 to 142 1 2 3 4 5 6 X X X 10 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X X 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows ito 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a na. 12AVB 8, 9, 10Case 31 3 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 X X X 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X X X 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 9, 10,Case 32 3 11 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 8 X X X 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 X X X 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 10, 11,Case 33 3 12 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 8 9 X X XGroup 2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 9 X X XGroup 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 9 n.a n.a. XGroup 4 Rows 1 to 14 1 n~a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. XAVB 1, 2, 3,Case 34 4 4Missing Group1 Rows 48 to 142 X X X X 5 6 7 8 9 10 11 12Group 2 Rows 27to47 X X X X 5 n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 X n.a n.a X 5 n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 X n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 2, 3, 4,Case 35 4 5Missing Group1 Rows 48 to 142 1 X X X X 6 7 8 9 10 11 12Group 2 Rows 27 to 47 1 X X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 121814-AA086-M0238, REV. 0Page 70 of 415 Page 70 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 3, 4, 5,Case 36 4 6Missing Group1 Rows 48 to 142 1 2 X X X X 7 8 9 10 11 12Group2 Rows 27to47 1 2 X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a na. 12AVB 4, 5, 6,Case 37 4 7Missing Group1 Rows 48 to 142 1 2 3 X X X X 8 9 10 11 12Group 2 Rows 27 to47 1 2 3 X X n.a na. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 5, 6, 7,Case 38 4 8Missing Group1 Rows 48 to 142 1 2 3 4 X X X X 9 10 11 12Group 2 Rows 27to47 1 2 3 4 X n.a n.a. X 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 X n.a n.a. X 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a 9 n.a n.a. 12AVB 6, 7, 8,Case 39 4 9Missing Group1 Rows 48 to 142 1 2 3 4 5 X X X X 10 11 12Group2 Rows 27to47 1 2 3 4 5 n.a n.a. X X 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows 1to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 7, 8, 9,Case 40 4 10 Missing Group 1 Rows 48 to 142 1 2 3 4 5 6 X X X X 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X X X 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows i to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 8, 9,10, 11Case 41 4 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 7 X X X X 12Group2 Rows 27to47 1 2 3 4 5 n.a n.a. X X X X 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 121814-AA086-M0238, REV. 0Page 71 of 415 Page 71 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 9, 10,11, 12Case 42 4 Missing Group I Rows 48 to 142 1 2 3 4 5 6 7 8 X X X XGroup 2 Rows 27to47 1 2 3 4 5 n.a n.a. 8 X X X XGroup 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. 8 X n.a n.a. XGroup 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. XAVB 1, 2, 3,Case 43 5 4,5Missing Group1 Rows 48 to 142 X X X X X 6 7 8 9 10 11 12Group 2 Rows 27 to 47 X X X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 X n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 X n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 2, 3, 4,Case 44 5 5,6Missing Group1 Rows 48 to 142 1 X X X X X 7 8 9 10 11 12Group 2 Rows 27to47 1 X X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows ito 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 3, 4, 5,Case 45 5 6,7Missing Group1 Rows 48 to 142 1 2 X X X X X 8 9 10 11 12Group 2 Rows 27to47 1 2 X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 4, 5, 6,Case 46 5 7,8Missing Group1 Rows 48 to 142 1 2 3 X X X X X 9 10 11 12Group2 Rows 27to47 1 2 3 X X n.a n.a. X 9 10 11 12Group 3 Rows 15 to 26 1 a.a n.a X X n.a n.a. X 9 n.a n.a. 12Group 4 Rows 1to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 5, 6, 7,Case 47 5 8,9Missing Group1 Rows 48 to 142 1 2 3 4 X X X X X 10 11 12Group 2 Rows 27to47 1 2 3 4 X n.a n.a. X X 10 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 121814-AA086-M0238, REV. 0Page 72 of 415 Page 72 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 6, 7, 8,9,10Case 48 5 Missing Group1 Rows 48 to 142 1 2 3 4 5 X X X X X 11 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X X X 11 12Group 3 Rows 15to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 7, 8, 9,10, 11Case49 5 Missing Group I Rows 48to 142 1 2 3 4 5 6 X X X X X 12Group 2 Rows27to47 1 2 3 4 5 n.a n.a. X X X X 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 8, 9,10, 11, 12Case 50 5 Missing Group i Rows 48 to 142 1 2 3 4 5 6 7 X X X X XGroup 2 Rows27to47 1 2 3 4 5 n.a n.a. X X X X XGroup 3 Rows 15to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. XGroup 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. XAVB 1, 2, 3,4,5, 6Case 51 6 Missing Group1 Rows48to142 X X X X X X 7 8 9 10 11 12Group 2 Rows27to47 X X X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15to26 X n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 X n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 2, 3, 4,5,6,7Case 52 6 Missing Group1 Rows48to142 1 X X X X X X 8 9 10 11 12Group 2 Rows 27to47 1 X X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15to 26 1 n.a n.a X X n.a n.a. 8 9 n.a na. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 121814-AA086-M0238, REV. 0Page 73 of 415 Page 73 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 3, 4, 5,6,7,8Case 53 6 Missing Group1 Rows 48 to 142 1 2 X X X X X X 9 10 11 12Group 2 Rows 27to47 1 2 X X X n.a n.a. X 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 4, 5, 6,7,8,9Case 54 6 Missing Group1 Rows 48 to 142 1 2 3 X X X X X X 10 11 12Group 2 Rows 27to47 1 2 3 X X n.a n.a. X X 10 11 12Group 3 Rows 15 to 26 1 n.a n~a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 5, 6, 7,8,9,10Case 55 6 Missing Group 1 Rows 48 to 142 1 2 3 4 X X X X X X 11 12Group 2 Rows 27to47 1 2 3 4 X n.a n.a. X X X 11 12Group 3 Rows 15 to 26 1 n.a n.a 4 X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 6, 7, 8,9, 10, 11Case 56 6 Missing Group1 Rows 48 to 142 1 2 3 4 5 X X X X X X 12Group 2 Rows 27to47 1 2 3 4 5 n.a n.a. X X X X 12Group 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. 12AVB 7, 8, 9,10, 11, 12Case 57 6 Missing Group1 Rows 48 to 142 1 2 3 4 5 6 X X X X X XGroup2 Rows 27to47 1 2 3 4 5 n.a n.a. X X X X XGroup 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. XGroup 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. X1814-AA086-M0238, REV. 0Page 74 of 415 Page 74 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 1, 2, 3,4,5,6,7Case 58 7 Missing Group1 Rows 48 to 142 X X X X X X X 8 9 10 11 12Group 2 Rows 27to47 X X X X X n.a n.a. 8 9 10 11 12Group 3 Rows 15 to 26 X n.a n.a X X n.a n.a. 8 9 n.a n.a. 12Group 4 Rows 1 to 14 X n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 2, 3, 4,5,6,7,8Case 59 7 Missing Group1 Rows48to142 1 X X X X X X X 9 10 11 12Group 2 Rows 27to47 1 X X X X n.a n.a. X 9 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X 9 n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n~a. n.a 9 n.a n.a. 12AVB 3, 4, 5,6,7,8,9Case 60 7 Missing Group1 Rows48to142 1 2 X X X X X X X 10 11 12Group 2 Rows 27to47 1 2 X X X n.a n.a. X X 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X noa n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n~a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 4, 5, 6,7,8,9,10Case 61 7 Missing Group1 Rows 48 to 142 1 2 3 X X X X X X X 11 12Group 2 Rows27to47 1 2 3 X X n.a n.a. X X X 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n~a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 5, 6, 7,8,9,10,11Case 62 7 Missing Group1 Rows 48 to 142 1 2 3 4 X X X X X X X 12Group2 Rows 27to47 1 2 3 4 X n.a n.a. X X X X 12Group 3 Rows 15 to 26 1 n.a n.a 4 X n.a n.a. X X n.a n.a. 121 Group 4 Rows 1 to 14 1 n.a n.a 4 noa n.e n.e. n.e X n.a n.a. 121814-AA086-M0238, REV. 0Page 75 of 415 Page 75 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 6, 7, 8,9, 10, 11, 12Case 63 7 Missing Group1 Rows 48 to 142 1 2 3 4 5 X X X X X X XGroup 2 Rows 27to47 1 2 3 4 5 n.a n.a. X X X X XGroup 3 Rows 15 to 26 1 n.a n.a 4 5 n.a n.a. X X n.a n.a. XGroup 4 Rows 1 to 14 1 n.a n~a 4 n.a n.a n.a. n.a X n.a n.a. XAVB 1, 2, 3,4,5,6,7,8Case 64 8 Missing Group1 Rows 48 to 142 X X X X X X X X 9 10 11 12Group 2 Rows 27to47 X X X X X n.a n.a. X 9 10 11 12Group 3 Rows 15 to 26 X n.a n.a X X n.a n.a. X 9 n.a n.a. 12Group 4 Rows 1 to 14 X n.a n.a X n.a n.a n.a. n.a 9 n.a n.a. 12AVB 2, 3, 4,5,6,7,8,9Case 65 8 Missing Group I Rows 48 to 142 1 X X X X X X X X 10 11 12Group 2 Rows 27 to 47 1 X X X X n.a n.a. X X 10 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a na. 12AVB 3, 4, 5,6,7,8,9,10Case 66 8 Missing Group1 Rows 48 to 142 1 2 X X X X X X X X 11 12Group 2 Rows 27 to 47 1 2 X X X n.a n.a. X X X 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 4, 5, 6,7, 8, 9, 10,Case 67 8 11 Missing Group i Rows 48 to 142 1 2 3 X X X X X X X X 12Group 2 Rows 27 to 47 1 2 3 X X n.a n.a. X X X X 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a n.e. 121814-AA086-M0238, REV. 0Page 76 of 415 Page 76 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 5, 6, 7,8, 9, 10, 11,Case 68 8 12 Missing Group1 Rows 48 to 142 1 2 3 4 X X X X X X X XGroup2 Rows 27to47 1 2 3 4 X n.a n.a. X X X X XGroup 3 Rows 15 to 26 1 n.a n.a 4 X n.a n.a. X X n.a n.a. XGroup 4 Rows 1 to 14 1 n.a n.a 4 n.a n.a n.a. n.a X n.a n.a. XAVB 1, 2, 3,4,5,6,7,8,Case 69 9 9Missing Group1 Rows 48 to 142 X X X X X X X X X 10 11 12Group 2 Rows 27 to 47 X X X X X n.a n.a. X X 10 11 12Group 3 Rows 15 to 26 X n.a n.a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 X n.a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 2, 3, 4,5,6,7,8,9,Case 70 9 10 Missing Group1 Rows 48 to 142 1 X X X X X X X X X 11 12Group 2 Rows 27 to 47 1 X X X X n.a n.a. X X X 11 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 3, 4, 5,6,7,8,9,10, 11Case 71 9 Missing Group1 Rows 48 to 142 1 2 X X X X X X X X X 12Group 2 Rows 27 to 47 1 2 X X X n.a n.a. X X X X 12Group 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 4, 5, 6,7,8,9,10,11, 12Case 72 9 Missing Group1 Rows 48 to142 1 2 3 X X X X X X X X XGroup 2 Rows 27 to 47 1 2 3 X X n.a n.a. X X X X XGroup 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n.a n.a. XGroup 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a n.a. X1814-AA086-M0238, REV. 0Page 77 of 415 Page 77 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 1, 2, 3,4,5,6,7, 8,9,10Case 73 10 Missing Group1 Rows 48 to 142 X X X X X X X X X X 11 12Group 2 Rows 27 to 47 X X X X X n.a n.a. X X X 11 12Group 3 Rows 15 to 26 X n.a n.a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 X n~a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 2, 3, 4,5, 6, 7,8,9,10, 11Case 74 10 Missing Group1 Rows 48 to 142 1 X X X X X X X X X X 12Group 2 Rows 27 to 47 1 X X X X n~a n.a. X X X X 12Group 3 Rows 15 to 26 1 n.a n.a X X n~a n.a. X X n.a n.a. 12Group 4 Rows 1 to 14 1 n.a n.a X n~a n.a n.a. n.a X n.a n.a. 12AVB 3, 4, 5,6,7,8,9,10, 11, 12Case 75 10 Missing Group I Rows 48 to 142 1 2 X X X X X X X X X XGroup 2 Rows 27 to 47 1 2 X X X n.a n.a. X X X X XGroup 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n.a n.a. XGroup 4 Rows 1 to 14 1 n.a n.a X n.a n.a n.a. n.a X n.a n.a. XAVB 1, 2, 3,4,5,6,7,8,9, 10, 11Case 76 11 Missing Group1 Rows 48 to142 X X X X X X X X X X X 12Group 2 Rows 27 to 47 X X X X X n.a n.a. X X X X 12Group 3 Rows 15 to 26 X n.a n.a X X n.a n.a. X X n.a n.a. 12Group 4 Rows 1to 14 X n.a n.a X n.a n.a n.a. n.a X n.a n.a. 12AVB 2, 3, 4,5,6,7,8,9,10, 11, 12Case 77 11 Missing Group1 Rows 48 to 142 1 X X X X X X X X X X XGroup 2 Rows 27 to 47 1 X X X X n.a n.a. X X X X XGroup 3 Rows 15 to 26 1 n.a n.a X X n.a n.a. X X n.a n.a. XGroup 4 Rows 1 to 14 1 n~a n.a X n.a n.a n.a. n.a X n~a n.a. X1814-AA086-M0238, REV. 0Page 78 of 415 Page 78 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-1 (Continued)Possible AVB Support Cases with Adjacent Missing AVBsAVB 1 ALL-Case 78 12 Missing Group 1 Rows 48 to 142 X X X X X X X X X X X XGroup 2 Rows 27 to 47 X X X X X n.a n.a. X X X X XGroup 3 Rows 15 to 26 X n.a n.a X X n.a n.a. X X n.a na. XGroup 4 Rows 1 to 14 X n.a n.a X n.a n.a n.a. n.a X noa n.a. X1814-AA086-M0238, REV. 0Page 79 of 415 Page 79 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-1Representative FASTVIB / FLOVIB Tube Model1814-AA086-M0238, REV. 0Page 80 of 415 Page 80 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Top CenterHot Leg SideReference Drawing L5-04FU1 12Figure 4-2AVB Numbering1814-AA086-M0238, REV. 0Page 81 of 415 Page 81 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.2 MethodInitially, linear dynamic analyses to characterize the response of the entire tube bundle to flow-induced excitation are performed using FASTVIB. These analyses identify limiting locations forvarious support conditions and show how the tubes of interest relate to the total bundle responseas described in Section 4.3. FASTVIB incorporates the analytical approaches that were largelydefined by the work of H.J. Connors at the Westinghouse Research Laboratories (now Scienceand Technology Center). Verification and qualification of this methodology for steam generatorapplications includes not only the analytical comparisons in configuration control files, but alsomany comparisons with results from tests and operating steam generators. These includecomparisons with a 49-tube test model of the inlet region in water flow, a quarter-scale model ofthe U-bend tested in air, a .01 power scale Model F steam generator (MB-2), cantilever tube airflow tests, and operating Model 51 and Model F steam generators.FASTVIB uses an assembly of structural elements and lumped masses with up to six degrees offreedom per node in a formulation adapted from FLOVIB, one of the earliest finite elementprograms applied to FIV analysis. Natural frequencies and mode shapes of the elastic structureare determined by conventional eigenvalue/modal decomposition techniques. Tube response toboth flow turbulence and fluidelastic excitation is calculated consistent with the framework andempirical constants originally determined by H.J. Connors that has been applied for decades withconfirmatory field experience. Fluid density and gap velocity distributions obtained from VGUBpost-processing of ATHOS results are used along with structural properties of the tube andsupport configuration in these solutions. FASTVIB automates multiple solutions and storeslimiting parameters in a format that is very useful for screening and subsequent evaluation (suchas inputs to the wear evaluation described in Section 7.3). The entire set of ATHOSNGUBboundary conditions is accessed electronically to obtain boundary conditions for each column ineach tube row being evaluated. Every tube column in up to 25 tube rows can be evaluated withsignificant parameter results stored and reported for any region of interest for each run. Total tuberesponses to the external flow excitation are obtained during evaluation of the SONGS RSGs, butonly the response in the U-bend region of interest is retained to manage the size of output files.a,c,e1814-AA086-M0238, REV. 0Page 82 of 415 Page 82 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e1814-AA086-M0238, REV. 0Page 83 of 415 Page 83 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e4.2.1 Fluidelastic ExcitationFluidelastic tube vibration is potentially more severe than the always present background flowturbulence because it is a self-excited mechanism. That is, relatively large tube amplitudes canfeedback proportionally large driving forces if a tube excitation threshold is exceeded as aconsequence of fluid-coupled damping or stiffness interaction with tube velocity or displacement.This mechanism is the primary focus of this evaluation because no other flow-induced vibrationmechanism is capable of producing the kind of response observed in the highly turbulent, two-phase flow U-bend region of the SONGS steam generators. Tube support spacing incorporatedinto the design of the tube support system typically provides tube response frequencies such thatthe tube excitation threshold is not exceeded for anticipated secondary fluid flow conditions. Thisapproach provides margin against initiation of fluidelastic vibration for tubes that are effectivelysupported as designed for anticipated flow excitation levels.However, clearances between the tubes and supporting structure introduce the potential that anygiven tube support location may not be totally effective in restraining tube motion. Initiation offluidelastic tube response within available support clearances is possible if secondary flowconditions exceed the tube excitation threshold when no support or frictional constraint isassumed at a location with a gap around the tube as a consequence of the longer span initiallyafforded by the gap. This kind of gap-limited fluidelastic vibration is not as severe as the classicaltube excitation response between spans that are too long for the existing flow field. This is theresult of the constraint of the gap after the tube moves across the available gap when modulationoccurs as fluidelastically induced tube/support interaction momentarily increases damping andhigher modal frequencies in response to initiation of fluidelastic vibration within the gap. Thetemporary increase in damping and energy dissipation from the interaction then momentarilyreduces or eliminates the fluidelastic component of vibration, which in turn reduces tube/supportinteraction and some higher frequency response, thereby decreasing damping again.While the consequential tube/support interaction with intermittent impact/sliding conditions is notas severe as that for the classical fluidelastic tube excitation mechanism, it is much more severethan interaction induced by flow turbulence alone. This type of motion involves potential forsignificant tube wear and fatigue damage and is the mechanism treated by methodologydescribed in Section 7.1 with resulting tube/AVB wear described in Section 7.3.1814-AA086-M0238, REV. 0Page 84 of 415 Page 84 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e1814-AA086-M0238, REV. 0Page 85 of 415 Page 85 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013I a,c,e4.2.1.1 Tube Excitation Constant for Straight Leg RegionII a,c,e4.2.1.2[Tube Excitation Constant for U-bend RegionI a,c,e1814-AA086-M0238, REV. 0Ia,c,ePage 86 of 415 Page 86 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e4.2.2 Flow TurbulenceII a,c,eI1814-AA086-M0238, REV. 0Page 87 of 415 Page 87 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a.c,e4.2.3 Damping in the Straight Leg Region[I a,ce4.2.4 Damping in the U-bend Region[a Bc~e1814-AA086-M0238, REV. 0Page 88 of 415 Page 88 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e4.2.5 Flow-Induced Vibration Relevant Input Parameters4.2.5.1 Damping Values for FIV Evaluation[] a,c,eI1814-AA086-M0238, REV. 0Page 89 of 415 Page 89 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e1814-AA086-M0238, REV. 0Page 90 of 415 Page 90 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,ea,c,e1814-AA086-M0238, REV. 0Page 91 of 415 Page 91 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.2.5.2 Fluidelastic Tube Excitation Constant,[Ia,c,e1814-AA086-M0238, REV. 0Page 92 of 415 Page 92 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e4.2.5.3 Other Relevant Constants and ParametersII a,c,eI1814-AA086-M0238, REV. 0Page 93 of 415 Page 93 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eAll of the other FIV relevant input parameters as they pertain to the tube material anddimensions are also listed in Table 4-2 with their appropriate reference(s) noted.1814-AA086-M0238, REV. 0Page 94 of 415 Page 94 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-2FIV Relevant Input ParametersParameter Value Reference (s)Young's Modulus, psi 28.0x106 to 28.1x106 ASME CodePoisson's Ratio 0.32 ASME CodeTube Metal Density, lb/in3 0.2905 Reference 4-7Tube Axial Area, in2 0.09551 Table 4-3Tube Shear Area, in2 0.04775 0.5*Axial areaTube Flexural Inertia, in4 0.005989 Table 4-3Tube Torsional Inertia, in4r' 0.011979 c,e Table 4-3Strouhal Number, St Section 4.2.5.3Inside Diameter of Tube, in Table 4-3Outside Diameter of Tube, in Table 4-3Lift Coefficient, CL Section 4.2.5.3Axial Flow Turbulence Amplitude Constant, ClA Section 4.2.5.3Cross Flow Turbulence Amplitude Constant, C, Section 4.2.5.3Correlation Parameter Section 4.2.5.3Cross Flow Turbulence Velocity Power Constant, c Section 4.2.5.3Axial Flow Turbulence Velocity Power Constant, S, Section 4.2.5.3Damping Expression (Pinned Reference) Section 4.2.5.1Two-phase Damping (minimum o) Section 4.2.5.1Two-phase Damping (maximum S) Section 4.2.5.1Threshold Tube Excitation Constant, Beta Section 4.2.5.2Added Mass Coefficient, Cm Section 4.2.11814-AA086-M0238, REV. 0Page 95 of 415 Page 95 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-3Straight Leg Tube Damping in Liquid1814-AA086-M0238, REV. 0Page 96 of 415 Page 96 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-4Strouhal Numbers for Normal Triangular Arrays1814-AA086-M0238, REV. 0Page 97 of 415 Page 97 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.2.6 Flow-Induced Vibration ModelThe flow-induced vibration (FIV) model for each individual tube is generated from the SONGSUnits 2 and 3 RSGs' geometry information in Reference 4-15 and the ATHOS model informationin Reference 4-7. Figure 4-1 depicts the FIV model for a representative tube case. Theboundary conditions in the model include the tubesheet, the seven tube support plates (TSPs)above the tubesheet on both the hot and cold leg sides, and the twelve anti-vibration bars(AVBs), where applicable, in the U-bend region. The tubesheet provides a fixed condition forthe FIV model on the hot and cold leg sides of the tube. The TSPs limit the in-plane (X-direction) and out-of-plane (Y-direction) displacements in the vertical legs of the tube bundle. Inthe U-bend region, the AVBs provide restraint in the out-of-plane (Y-direction) displacement.Table 4-3 contains the tube section properties for the tubes in the SONGS RSG. Table 4-4depicts the straight leg lengths of the model for a representation of the tube rows of interest.This table also includes the radius of the U-bend for each of these tube rows. Table 4-5contains the vertical distances for the TSPs along with the respective node distances for theindividual straight leg nodes used in the ATHOS model. The vertical distances for Nodes 42,43, 73, and 74 vary, depending on the tube row of interest. Table 4-6 shows the angle locationsof the respective AVBs for a representation of the tube rows considered in the analysis.1814-AA086-M0238, REV. 0Page 98 of 415 Page 98 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-3Tube Section PropertiesTubeOD, Outer Diameter, mm (in.) 19.05 0.75ID, Inner Diameter, mm (in.) 16.87 0.664Tube Wall Thickness, mm (in.) 1.09 0.043Axial Area, cmA2 (inA2) 0.6162 0.09551Moment of Inertia cmA4 (inA4) 0.2493 0.005989Torsional Moment of Inertia, cmA4(inA4) 0.4986 0.011979Tube Pitch, mm (in.), Triangular 25.4 1.00Tube Material Alloy 690Table 4-4Straight Leg and Tube U-bend Radius DimensionsRow No Dist. "A" Straight Radius-Leg -In InchI 336.610 308.420. 5.770.14 336.610 308.420 12.27040 336.610 .. 308.420 25.27074 336.660 308.467 42.27080 336.800 308.609 45.270100 337.280 309.081 55.270120' 338.220 310.025 65.270135 339.230 311.036 72.770141 339.680 311.485 75.770142 339.760 311.560 76.2701814-AA086-M0238, REV. 0Page 99 of 415 Page 99 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-5TSP and Straight Leg Node DimensionsPlate Distances SONGS RSGPlate Plate Dist From DeltaLetter TTS Distance-TTS 0.000A TsP 1 42.815 42.815B TSP 2 86.476 43.661C TSP 3 130.140 43.664D TSP 4 173.800 43.660E TSP 5 217.460 43.660F TSP 6 261.120 43.660G TSP 7 304.780 43.660Node Coordinate System In FLOVIB:Plate Coord Hot Leg Cold Leg DeltaTTS 0.000 1 1153.750 2.. 114. 3.757.500 3 113 3.7511.250 4 112 3.7515.000 5 111 3.7521.954 6 110 6.9528.907 7 109 6.9535.861 8 108 6.95TSP 1 42.815 9 107 6.9550.092 10 106 7.2857.369 11 105 7.2864.646 12 104 7.2871.923 13 103 7.2879.199 14 102 7.28TSP 2 86.476 15 101 7.2895.209 16 100 8.73103.940 17 99 8.73112.670 18 98 8.73121.410 19 97 8.74TSP 3 130.140 20 96 8.73138.870 21 95 8.73147.600 22 94 8.73156.340 23 93 8.741165.070 24 92 8.73TSP 4 173.800 25 91 8.73182.530 26 90 8.73191.260 27 89 8.73200.000 28 88 8.74208.730 29 87 8.73TSP 5 217.460 30 86 8.73226.190 31 85 8.73234.930 32 84 8.74243.660 33 83 8.73252.390 34 82 8.73TSP 6 261.120 35 81 8.73268.400 36 80 7.28275.670 37 79 7.27282.950 38 78 7.28290.230 39 77 7.28297.510 40 76 7.28TSP 7 304.780 41 75 7.27306.600 42 74 1.82308.420 43 73 1.821814-AA086-M0238, REV. 0 Page 100 of 415 Page 100 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-6AVB Support LocationsRow Angular Location of AVBs- Degrees1 33.70 .146.3014 170852.45 .127.55 162.9240 14.39 45.47 54.04 75.00: 1 05.00 125.96 134.53 157.57 165.6174 1i3.30 43.14 54.61' 71.48ý 84.72 95.28 108.52 125.39 136.86 155.55 166.7080 13.03,24.50:42.78 54.57 71.07* 84.45 95.55 108.93 125.43 137.22 155.50 166.97100 12.3324.62 41.86.54.47 70.02ý 83.78 96.22 109.98 125.53 138.14 155.38 167.67120 11.45 24.35 40.91 54.17 69.12 83.25 96.75 110.88 125.83 139.09 155.65 168.55135 10*71 23.98 40.18 53.8668.52 82.91 -97.09 -111i8 '126.A14 139.82156.02 169.29141 10.42 23.82 39.91 53.73 68.30 82.79 97.21 111.70 126.27 140.09 156.18 169.58142 10.37 23.79: 39.86 53.71 68.26 82.77 97.23 111.74 126.29 140.14 156.21 169.631814-AA086-M0238, REV. 0Page 101 of 415 Page 101 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.3 Typical ResultsMaps showing calculated tube excitation ratios were generated for the missing AVB cases thatcorrespond to the cases found for the most limiting tubes with wear. The cases chosen wereCases 17, 28, 37, 38, 45, 46, 53, 54, and 60. Table 4-1 contains the description of the caseswith respect to AVB support.4.3.1 Out-of-Plane ResultsThe tube excitation maps were plotted for the out-of-plane direction for the 100% and 70%power conditions in Figures 4-5 through Figure 4-22. Table 4-7 summarizes the FASTVIB plotsfor the out-of-plane direction available in this section.4.3.2 In-Plane ResultsThe stability maps were plotted for the in-plane-plane direction for the 100% and 70% powerconditions in Figures 4-23 through Figure 4-40. Table 4-7 summarizes the FASTVIB plots forthe inplane direction available in this section. Note that there were many other casesconsidered in the FASTVIB analysis; however, the magnitude of the output precluded theinclusion of all the results in this report.Table 4-7FASTVIB Tube Excitation PlotsNumber of Figure Number forCase Power FiueNmrfoNo. Missing Level Out-of-Plane In-PlaneAVBs17 2 100% 4-5 4-2328 3 100% 4-6 4-2437 4 100% 4-7 4-2538 4 100% 4-8 4-2645 5 100% 4-9 4-2746 5 100% 4-10 4-2853 6 100% 4-11 4-2954 6 100% 4-12 4-3060 7 100% 4-13 4-3117 2 70% 4-14 4-3228 3 70% 4-15 4-3337 4 70% 4-16 4-3438 4 70% 4-17 4-3545 5 70% 4-18 4-3646 5 70% 4-19 4-3753 6 70% 4-20 4-3854 6 70% 4-21 4-3960 7 70% 4-22 4-40Table 4-1 contains a description of the FASTVIB cases listed above.1814-AA086-M0238, REV. 0Page 102 of 415 Page 102 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-5Out-of-Plane Tube Excitation Ratio Map -100% Power -2 AVBs Missing(Case 17)1814-AA086-M0238, REV. 0Page 103 of 415 Page 103 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-6Out-of-Plane Tube Excitation Ratio Map -100% Power -3 AVBs Missing(Case 28)1814-AA086-M0238, REV. 0Page 104 of 415 Page 104 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-7Out-of-Plane Tube Excitation Ratio Map -100% Power -4 AVBs Missing(Case 37)1814-AA086-M0238, REV. 0Page 105 of 415 Page 105 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-8Out-of-Plane Tube Excitation Ratio Map -100% Power -4 AVBs Missing(Case 38)1814-AA086-M0238, REV. 0Page 106 of 415 Page 106 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-9Out-of-Plane Tube Excitation Ratio Map -100% Power -5 AVBs Missing(Case 45)1814-AA086-M0238, REV. 0Page 107 of 415 Page 107 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-10Out-of-Plane Tube Excitation Ratio Map -100% Power -5 AVBs Missing(Case 46)1814-AA086-M0238, REV. 0Page 108 of 415 Page 108 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-11Out-of-Plane Tube Excitation Ratio Map -100% Power- 6 AVBs Missing(Case 53)1814-AA086-M0238, REV. 0Page 109 of 415 Page 109 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-12Out-of-Plane Tube Excitation Ratio Map -100% Power -6 AVBs Missing(Case 54)1814-AA086-M0238, REV. 0Page 110 of 415 Page 110 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-13Out-of-Plane Tube Excitation Ratio Map -100% Power -7 AVBs Missing(Case 60)1814-AA086-M0238, REV. 0Page 111 of 415 Page 111 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eOut-of-Plane Tube ExcitationFigure 4-14Ratio Map -70% Power -2 AVBs Missing(Case 17)1814-AA086-M0238, REV. 0Page 112 of 415 Page 112 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-15Out-of-Plane Tube Excitation Ratio Map -70% Power -3 AVBs Missing(Case 28)1814-AA086-M0238, REV. 0Page 113 of 415 Page 113 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-16Out-of-Plane Tube Excitation Ratio Map -70% Power -4 AVBs Missing(Case 37)1814-AA086-M0238, REV. 0Page 114 of 415 Page 114 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-17Out-of-Plane Tube Excitation Ratio Map -70% Power -4 AVBs Missing(Case 38)1814-AA086-M0238, REV. 0Page 115 of 415 Page 115 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-18Out-of-Plane Tube Excitation Ratio Map -70% Power -5 AVBs Missing(Case 45)1814-AA086-M0238, REV. 0Page 116 of 415 Page 116 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e7Figure 4-19Out-of-Plane Tube Excitation Ratio Map -70% Power -5 AVBs Missing(Case 46)1814-AA086-M0238, REV. 0Page 117 of 415 Page 117 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-20Out-of-Plane Tube Excitation Ratio Map -70% Power -Columns 1 through 89 -6 AVBsMissing(Case 53)1814-AA086-M0238, REV. 0Page 118 of 415 Page 118 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-21Out-of-Plane Tube Excitation Ratio Map -70% Power -Columns I through 89 -6 AVBsMissing(Case 54)1814-AA086-M0238, REV. 0Page 119 of 415 Page 119 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-22Out-of-Plane Tube Excitation Ratio Map -70% Power -Columns 1 through 89 -7 AVBsMissing(Case 60)1814-AA086-M0238, REV. 0Page 120 of 415 Page 120 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-23In-Plane Stability Ratio Map -100% Power -2 AVBs Missing(Case 17)1814-AA086-M0238, REV. 0Page 121 of 415 Page 121 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-24In-Plane Stability Ratio Map -100% Power -3 AVBs Missing(Case 28)1814-AA086-M0238, REV. 0Page 122 of 415 Page 122 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-25In-Plane Stability Ratio Map -100% Power -4 AVBs Missing(Case 37)1814-AA086-M0238, REV. 0Page 123 of 415 Page 123 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-26In-Plane Stability Ratio Map -100% Power- 4 AVBs Missing(Case 38)1814-AA086-M0238, REV. 0Page 124 of 415 Page 124 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,c,eFigure 4-27In-Plane Stability Ratio Map -100% Power -5 AVBs Missing(Case 45)1814-AA086-M0238, REV. 0Page 125 of 415 Page 125 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-28In-Plane Stability Ratio Map -100% Power -5 AVBs Missing(Case 46)1814-AA086-M0238, REV. 0Page 126 of 415 Page 126 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-29In-Plane Stability Ratio Map -100% Power -6 AVBs Missing(Case 53)1814-AA086-M0238, REV. 0Page 127 of 415 Page 127 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-30In-Plane Stability Ratio Map -100% Power -6 AVBs Missing(Case 54)1814-AA086-M0238, REV. 0Page 128 of 415 Page 128 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-31In-Plane Stability Ratio Map -100% Power -7 AVBs Missing(Case 60)1814-AA086-M0238, REV. 0Page 129 of 415 Page 129 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-32In-Plane Stability Ratio Map -70% Power -2 AVBs Missing(Case 17)1814-AA086-M0238, REV. 0Page 130 of 415 Page 130 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,c,eFigure 4-33In-Plane Stability Ratio Map -70% Power -3 AVBs Missing(Case 28)1814-AA086-M0238, REV. 0Page 131 of 415 Page 131 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,e7Figure 4-34In-Plane Stability Ratio Map -70% Power -4 AVBs Missing(Case 37)1814-AA086-M0238, REV. 0Page 132 of 415 Page 132 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-35In-Plane Stability Ratio Map -70% Power -4 AVBs Missing(Case 38)1814-AA086-M0238, REV. 0Page 133 of 415 Page 133 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-36In-Plane Stability Ratio Map -70% Power -5 AVBs Missing(Case 45)1814-AA086-M0238, REV. 0Page 134 of 415 Page 134 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-37In-Plane Stability Ratio Map -70% Power -5 AVBs Missing(Case 46)1814-AA086-M0238, REV. 0Page 135 of 415 Page 135 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-38In-Plane Stability Ratio Map -70% Power -6 AVBs Missing(Case 53)1814-AA086-M0238, REV. 0Page 136 of 415 Page 136 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-39In-Plane Stability Ratio Map -70% Power -6 AVBs Missing(Case 54)1814-AA086-M0238, REV. 0Page 137 of 415 Page 137 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-40In-Plane Stability Ratio Map -70% Power -7 AVBs Missing(Case 60)1814-AA086-M0238, REV. 0Page 138 of 415 Page 138 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.3.3 Typical Mode Shapes4.3.3.1 All A VB Supports EffectiveIn Task 1 (Reference 4-1), the FIV analysis addressed the condition where all of the supportsare effective (pinned) in both the U-bend and in the straight leg, i.e., Case 0. For the out-of-plane responses, a large number of the tubes have tube excitation ratio values of 0.00 in the U-bend region, but can range up to 0.39 for the higher tube row numbers. Figures 4-41 through 4-43 depict the out-of-plane mode shapes for representative tube locations R120 C80, R135 C85,and R141 C81, respectively. Note that the frequencies considered in Case 0 analyses rangedup to 300 Hz. With respect to the in-plane responses in the U-bend region for Case 0, no in-plane responses occur in this region for frequencies up to 200 Hz.4.3.3.2 Missing A VB SupportsIn Task 2, the FIV analysis addressed the conditions where one AVB support is ineffective. TheFIV analysis also evaluated two continuous ineffective AVBs and progressed in continuousincrements of two ineffective AVBs until in-plane fluidelastic instability is encountered. Both out-of-plane and in-plane responses are considered.For the out-of-plane responses, all of the tubes are stable for one AVB support missing.Figures 4-44 and 4-45 depict the out-of-plane mode shapes for the representative tube locationR120 C80 for Cases 3 and 4 where AVBs 3 and 4, respectively, are missing. Figure 4-46contains an out-of-plane mode shape for tube location R135 C85 for Case 5 with AVB 5missing.When two AVB supports are missing, tube excitation for out-of-plane responses begins at tubesabove Row 122. Figures 4-47 and 4-48 show the out-of-plane mode shapes for tube locationsR120C80 and R141C81 for Case 13 with AVBs 1 and 2 missing. Figure 4-49 depicts the out-of-plane mode shape for R135C85 for Case 14 with AVBs 2 and 3 missing. Similarly, Figure 4-50shows the out-of-plane mode shape for R141C81 for Case 15 with AVBs 3 and 4 missing.With more than two AVB supports missing, tube excitation for out-of-plane responses occurs fortubes above Row 80 with four AVBs missing, tubes above Row 49 with six AVBs missing, andtubes above Row 40 with eight AVBs missing. Figure 4-51 depicts the out-of-plane mode shapefor R120C80 for Case 34 with AVBs 1 through 4 missing. Figure 4-52 shows the out-of-planemode shape for R120 C80 for Case 51 with AVBs 1 through 6 missing. Similarly, Figure 4-53contains the out-of-plane mode shape for R120 C80 for Case 64 with AVBs 1 through 8missing.For the in-plane responses, all of the tubes are stable for one or two AVB supports missing.Only when more than two AVBs are missing does instability start to occur. Instability is presentin tubes above Row 110 with four AVBs missing, tubes above Row 105 with six AVBs missing,and tubes above Row 74 with eight AVBs missing. Figure 4-54 depicts the in-plane modeshape for R120 C80 for Case 34 with AVBs 1 through 4 missing. Figure 4-55 shows the in-plane mode shape for R120 C80 for Case 51 with AVBs 1 through 6 missing. Similarly,Figure 4-56 contains the in-plane mode shape for R120 C80 for Case 64 with AVBs 1 through 8missing.1814-AA086-M0238, REV. 0Page 139 of 415 Page 139 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-41Out-of-Plane Mode Shape Plot for R120 C80 -No AVBs Ineffective(Case 0)1814-AA086-M0238, REV. 0Page 140 of 415 Page 140 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-42Out-of-Plane Mode Shape Plot for R135 C85 -No AVBs Ineffective(Case 0)1814-AA086-M0238, REV. 0Page 141 of 415 Page 141 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-43Out-of-Plane Mode Shape Plot for R141 C81 -No AVBs Ineffective(Case 0)1814-AA086-M0238, REV. 0Page 142 of 415 Page 142 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-44Out-of-Plane Mode Shape Plot for R120 C80 -1 AVB Ineffective(Case 3)1814-AA086-M0238, REV. 0Page 143 of 415 Page 143 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-45Out-of-Plane Mode Shape Plot for R120 C80 -1 AVB Ineffective(Case 4)1814-AA086-M0238, REV. 0Page 144 of 415 Page 144 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-46Out-of-Plane Mode Shape Plot for R135 C85 -1 AVB Ineffective(Case 5)1814-AA086-M0238, REV. 0Page 145 of 415 Page 145 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-47Out-of-Plane Mode Shape Plot for R120 C80 -2 AVBs Ineffective(Case 13)1814-AA086-M0238, REV. 0Page 146 of 415 Page 146 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-48Out-of-Plane Mode Shape Plot for R141 C81 -2 AVBs Ineffective(Case 13)1814-AA086-M0238, REV. 0Page 147 of 415 Page 147 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-49Out-of-Plane Mode Shape Plot for R135 C85 -2 AVBs Ineffective(Case 14)1814-AA086-M0238, REV. 0Page 148 of 415 Page 148 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-50Out-of-Plane Mode Shape Plot for R141 C81 -2 AVBs Ineffective(Case 15)1814-AA086-M0238, REV. 0Page 149 of 415 Page 149 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-51Out-of-Plane Mode Shape Plot for R120 C80 -4 AVBs Ineffective(Case 34)1814-AA086-M0238, REV. 0Page 150 of 415 Page 150 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-52Out-of-Plane Mode Shape Plot for R120 C80 -6 AVBs Ineffective(Case 51)1814-AA086-M0238, REV. 0Page 151 of 415 Page 151 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-53Out-of-Plane Mode Shape Plot for R120 C80 -8 AVBs Ineffective(Case 64)1814-AA086-M0238, REV. 0Page 152 of 415 Page 152 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-54In-Plane Mode Shape Plot for R120 C80 -4 AVBs Ineffective(Case 34)1814-AA086-M0238, REV. 0Page 153 of 415 Page 153 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-55In-Plane Mode Shape Plot for R120 C80 -6 AVBs Ineffective(Case 51)1814-AA086-M0238, REV. 0Page 154 of 415 Page 154 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-56In-Plane Mode Shape Plot for R120 C80 -8 AVBs Ineffective(Case 64)1814-AA086-M0238, REV. 0Page 155 of 415 Page 155 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.4 Additional Considerations4.4.1 SG 2E088 versus SG 2E089 and Low versus High ColumnReview of the available operating data indicates that SG 2E088 and SG 2E089 operate at closebut slightly different thermal-hydraulic conditions. At the start of this analysis it was not clear ifthis was a significant effect or not, therefore a study was performed to determine if these smallchanges in operating conditions are meaningful. The study was performed by running ATHOSand FASTVIB for each SG and comparing results obtained for SG 2E088 and SG 2E089. If theresults were significantly different, then it would be necessary to address each SG separately.Note that this was not an anticipated outcome, but the following study clearly made adetermination that totally separate analysis for SG 2E088 and SG 2E089 was not necessary.The initial ATHOS runs were for SG 2E089. To determine if additional ATHOS and FASTVIBruns for the 2E088 steam generator were needed, the 70% power level was run for SG 2E088and compared to the SG 2E089 results. The goal of the comparison was to show that theresults between the two steam generators were similar enough such that the ATHOS andFASTVIB evaluations did not need to be performed for every power level for each steamgenerator. In addition, it was noted that tube plugging in the steam generators was notsymmetrical about the center column of the tube bundle. Both ATHOS and FASTVIB assumesymmetry about the center column as the SG is typically symmetric about this plane. Thereforetwo separate evaluations were needed, one for each side of the steam generator (low columnand high column). Although the intention was to evaluate both the low and high column tubesfor SG 2E089, a comparison was also made between the low and high column tubes todetermine the amount of difference associated with non-symmetrical tube plugging.Three limiting tubes were selected for a direct comparison with their respective FASTVIBmissing AVB cases. These tubes were R119 C89, which is the limiting active tube in SG2E089, R1 33 C91, which is the limiting plugged tube without a stabilizer in SG 2E088, and Ri 11C81, which is the limiting stabilized tube in SG 2E089. Note that the stabilizer case wasassumed to be the stabilizer surrounded by secondary water scenario. These cases were runwith the 70% power level ATHOS data for SGs 2E088 and 2E089 with both the low and highcolumn data.The tube excitation ratios for the three limiting tubes are shown in Table 4-8 for the out-of-planedirection and in Table 4-9 for the in-plane direction. These tables provide comparisons of tubeexcitation ratios for low column versus high column results for both SG 2E088 and SG 2E089.With these tables it is possible to make comparisons between the two SGs and also betweenthe high and low columns for both the in-plane and out-of-plane directions. The tube excitationmaps for Case 46 with active tubes are plotted in Figure 4-57 through Figure 4-64 forcomparative purposes for all of the tubes considered. Note that there are only very slightdifferences between each of the indicated cases.In conclusion, Table 4-8 and Table 4-9 show that the tube excitation ratios are essentially thesame with small changes in the hundredths place. This difference is insignificant for thepurposes of this evaluation. The tube excitation ratio maps in Figure 4-57 through Figure 4-64also show the same trend with the differences in stability ratio being small occurring in thehundredths place. The trend shown in Table 4-8, Table 4-9 and by comparing Figure 4-57through Figure 4-64, is typical of all of the cases run for SG 2E089 compared to the SG 2E088results as well as the low column versus high column results.1814-AA086-M0238, REV. 0Page 156 of 415 Page 156 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013It can be concluded that the differences in the steam generators resulting from the differences inplugging and operating conditions is insignificant. Therefore, it is not necessary to run separatecases for the 2E088 steam generator as well as for both the low and high column tubes.However, the ATHOS VGUB files have been generated and are available for the low and highcolumns for all power levels considered in SG 2E089. For the purposes of the evaluation, thelow and high column tubes will be treated separately since the ATHOS data is available.1814-AA086-M0238, REV. 0Page 157 of 415 Page 157 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-8Tube Excitation Ratio Comparison SG 2E088 vs. 2E089 Low and High Tube ColumnsOut-of-PlaneOut-of-Plane Tube Out-of-Plane TubeTube SG Tube Max FASTVIB Sec Excitation Ratio Excitation RatioTube/AVB SG 2E088 SG 2E089Wear Low High Low HighR/C No Description Found Case Mass Columns Columns Columns Columnsa,c,eLimiting Active TubeR119C89 89 in SG 89 28% 46 PrimaryR133C91 88 Limiting Plugged 35% 18 AirTube in SG 88 (1 of 2)R111C81 89 Tube with Tube to 18% 38 StabilizerTube Wear (2 of 2)Table 4-9Tube Excitation Ratio Comparison SG 2E088 vs. 2E089 Low and High Tube ColumnsIn-PlaneTube SG Tube Max In-Plane Excitation In-Plane ExcitationTube/AVB Ratio SG 2E088 Ratio SG 2E089R/C No Description Wear Low High Low HighFound Case Mass Columns Columns Columns Columnsa,c,eR119C89 89 Limiting Active 28% 46 PrimaryTube in SG 2E089Limiting PluggedR133C91 88 Tube in SG 2E088 35% 18 Air(1 of 2)R111C81 89 Tube with Tube-to- 18% 38 StabilizerTube Wear (2 of 2)1814-AA086-M0238, REV. 0Page 158 of 415 Page 158 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-57Case 46 Primary Water Density Tube Excitation Ratio Map for SG 2E088Low Column Out-of-Plane1814-AA086-M0238, REV. 0Page 159 of 415 Page 159 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-58Case 46 Primary Water Density Tube Excitation Ratio Map for SG 2E088High Column Out-of-Plane1814-AA086-M0238, REV. 0Page 160 of 415 Page 160 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,c,eFigure 4-59Case 46 Primary Water Density Tube Excitation Ratio Map for SG 2E089Low Column Out-of-Plane1814-AA086-M0238, REV. 0Page 161 of 415 Page 161 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013ac,eFigure 4-60Case 46 Primary Water Density Tube Excitation Ratio Map for SG 2E089High Column Out-of-Plane1814-AA086-M0238, REV. 0Page 162 of 415 Page 162 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-61Case 46 Primary Water Density Stability Map for SG 2E088 Low Column In-Plane1814-AA086-M0238, REV. 0Page 163 of 415-Page 163 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-62Case 46 Primary Water Density Stability Map for SG 2E088 High Column In-Plane1814-AA086-M0238, REV. 0Page 164 of 415 Page 164 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-63Case 46 Primary Water Density Stability Map for SG 2E089 Low Column In-Plane1814-AA086-M0238, REV. 0Page 165 of 415 Page 165 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-64Case 46 Primary Water Density Stability Map for SG 2E089 High Column In-PlaneL1814-AA086-M0238, REV. 0Page 166 of 415 Page 166 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.4.2 Effects of Different Mass on Tube ResponseA comparison was performed for tubes that have been plugged to determine the impact ofvarious materials that could be inside the tube on the FIV evaluation. Several conditions canexist inside a plugged tube. The tube can have air inside of it, if it is leak tight, or it can havewater in it if the tube has leaked. The tube plugs generally do not leak, so the water inside ofthe tube would be considered to come from the secondary side due to a compromised tube wall.The tube can also have a cable stabilizer installed inside of it to provide support for a damagedtube. The stabilizer may be surrounded by air or water depending on the condition of theindividual tube.For the purposes of this comparison, the damping correlation used when a stabilizer is installedin the tube is assumed to be the same as a tube without a stabilizer. The damping correlation isdependent on the natural frequency of the mode shape and will change with frequency;however, the constants in the correlation are assumed to be the same. The stabilizers add asignificant amount of mass to the tube which will impact the FIV evaluation and the tubeexcitation ratio of the tube. The FASTVIB comparison will focus on the effects of this additionalmass by addressing the revised effective density of the tube.FASTVIB Cases 38 and 55 were chosen to be a representative set to be used in thecomparison of the plugged tube inside conditions. Three tubes were chosen for thecomparison, R100 C88, R120 C88 and R130 C88. These tubes were chosen because theyrepresent a range in tube rows where the majority of the wear conditions exist. In addition, thecentermost column was chosen since the highest tube excitation ratios generally occur near thecenter column.a,c,eThe tube excitation ratios for the four plugged tube cases are compared against the tubeexcitation ratios for an active tube that has primary water inside of the tube. These values aretabulated in Table 4-11. Plots of tube excitation ratio versus power level for the various tubecases are plotted for the Row 130 Column 88 tube in Figure 4-65 through Figure 4-68. For aplugged tube without a stabilizer installed, the tube excitation ratio increases slightly compared1814-AA086-M0238, REV. 0Page 167 of 415 Page 167 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013to the tube excitation ratio for when the tube is active. It can also be seen that the added massof the stabilizer slightly reduces the tube excitation ratio compared to an active tube. This effectis the largest for the 100% power case and, as the power level decreases, all of the cases tendto converge.There are several competing terms in the calculation of the tube excitation ratio equations thatcontribute to the change in the tube excitation ratio with the addition of a stabilizer. These termsare the natural frequency, virtual mass, and the damping. []a.c.e It has been found that for small changes intube mass, the tube excitation ratio will increase because the natural frequency tends to controlthe change in tube excitation ratio. However, for a significant increase in mass, the increaseddamping and virtual mass increase more rapidly than the decrease in the natural frequencycausing a net decrease in the tube excitation ratio.In Reference 4-16, it is found that the AREVA cable stabilizers do not extend through the fulllength of the tube, from tubesheet to tubesheet. The stabilizer is only long enough to extend thelength of one straight leg and completely through the U-bend region of the tube. FASTVIB isnot currently able to address multiple density inputs for different parts of the tube so thestabilizer either needs to be assumed to run the full length of the tube or be neglected in theanalysis. It is determined that the primary water density for the active tube case is conservativefor tubes with stabilizers and that active tube results can be applied to plugged tubes withstabilizers. The tubes of interest for the wear evaluation all contain cable stabilizers andtherefore only one set of cases with primary water density need to be run for this evaluation.4.4.3 Stabilization Using Two CablesA method for stabilizing tubes in the SONGS steam generators is to install two shorter cablestabilizers instead of installing one long cable stabilizer. One stabilizer will be inserted into thehot leg of the tube and a second stabilizer will be inserted into the cold leg. The cablestabilizers in each leg will extend approximately 60 degrees into the U-bend region of the tubeon each side leaving the top center 60 degrees of the U-bend unstabilized. A schematic of thisstabilization method is shown in Figure 4-69. The purpose of installing stabilizers in this fashionis that this configuration is expected to add additional damping to the tube and thus furtherreduce the excitation ratio of the tube. It is expected that an additional [ ]b damping isachieved from this configuration. This section quantifies the benefits of the additional damping.1814-AA086-M0238, REV. 0Page 168 of 415 Page 168 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013From Section 4.2.4, a generic two-phase damping model that was developed for the design andevaluation of the U-bend region was developed that has the form:a,c,eSection 4.4.2 of this report shows that the difference in the added mass of the stabilizer does notgreatly change the stability ratio. This comparison only accounted for the changes associatedwith the added mass and no change to the damping correlation was made. It is also true that theaddition of mass from the two stabilizers that only extend into part of the U-bend region will alsohave a small impact on the overall excitation ratio of the tube. However, the change in dampingwill have a significant impact on the excitation ratio since it directly factors into the calculation ofthe critical velocity term in the excitation ratio. The decrease in excitation ratio is proportional tothe square root of the difference in damping.a,c,eIn conclusion, the general effect of the two cable stabilizer configuration shown in Figure 4-69 willreduce the excitation/stability ratio by approximately 7% mainly due to the additional [ bdamping introduced by the cable stabilizer configuration.1814-AA086-M0238, REV. 0Page 169 of 415 Page 169 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-10Stabilizer Effective Density CalculationTod 0.75 in Tube Outer DiameterTw 0.0429 in Tube Wall ThicknessPw 45.523 lb/ftA3 Water Density @ 550°FPw 0.026 lb/inA3 Water Density @ 5501FMs 0.46 lb/ft Stabilizer weight per lengthPs 0.286 lb/inA3 Stainless Steel DensityDitube 0.6642 in Tube Inner DiameterAi 0.3465 inA2 Tube Inside AreaAs 0.1340 inA2 Stabilizer AreaStabilizer With Watera,c,ePeff Water lb/inA3 Stabilizer Effective Density with Water SurroundingPeff Water lb/ftA3 Stabilizer Effective Density with Water SurroundingStabilizer With Aira,c,ePeff Air lb/inA3 Stabilizer Effective Density with Air SurroundingPeffAir I b/ftA3 Stabilizer Effective Density with Air Surrounding1814-AA086-M0238, REV. 0Page 170 of 415 Page 170 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-11Tube Excitation Ratios for Tube Inside Density Cases at Power LevelOut-of-Plane In-PlanePrimary Water Density Primary Water DensityCase 38 100% 80% 70% 60% Case 38 100% 80% 70% 60%Power Power Power Power.., Power Power Power Power c,eR100C88 I R100C88 FR120C88 R120C88R130C88 R130C88Case 55 100% 80% 70% 60%a,_, Case 55 100% 80% 70% 60%R100C88 R100C88R120C88 R120C88R130C88 R130C88Secondary Water Density Secondary Water DensityCase 38 100% 80% 70% 60%a,c, Case 38 100% 80% 70% 60% a ,eR100C88 R100C88 JR120C88 R120C88R130C88 R130C88Case 55 100% 80% 70% 60% Case 55 100% 80% 70% 60% a,-,eR100C88 R100C88R120C88 R120C88R130C88 R130C88Stabilizer and Water Stabilizer and WaterCase 38 100% 80% 70% 60%. Case 38 100% 80% 70% 60% , eR100C88 R100C88R120C88 R120C88R130C88 R130C88Case 55 100% 80% 70% 60%a -Case 55 100% 80% 70% 60% a,(,eR100C88 7 R100C88R120C88 R120C88R130C88 R130C887i1814-AA086-M0238, REV. 0Page 171 of 415 Page 171 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-11 (Continued)Tube Excitation Ratios for Tube Inside Density Cases at Power LevelStabilizer and Air Stabilizer and AirCase 38 100% 80% 70% 60%a,c, Case 38 100% 80% 70% 60% a, eR100C88 R100C88R120C88 R120C88R130C88 R130C88Case 55 100% 80% 70% 60%a,., Case 55 100% 80% 70% 60%R100C88 R100C88 _a___eR120C88 R120C88R130C88 R130C88Air Only Air OnlyCase 38 100% 80% 70% 60%a,c, Case 38 100% 80% 70% 60% a,,eR100C88 R100C88R120C88 R120C88R130C88 R130C88Case 55 100% 80% 70% 60%ac, Case 55 100% 80% 70% 60% a,c eR100C88 R100C88R120C88 R120C88R130C88 F R130C881814-AA086-M0238, REV. 0Page 172 of 415 Page 172 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 a,c,eFigure 4-65Case 38 Out-of-Plane Tube Inside DensityTube Excitation Ratio vs. Power Level Plot -R130 C881814-AA086-M0238, REV. 0Page 173 of 415 Page 173 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-66Case 38 In-Plane Tube Inside DensityTube Excitation Ratio vs. Power Level Plot -R130 C881814-AA086-M0238, REV. 0Page 174 of 415 Page 174 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,.c,eFigure 4-67Case 55 Out-of-Plane Tube Inside DensityTube Excitation Ratio vs. Power Level Plot -R130 C881814-AA086-M0238, REV. 0Page 175 of 415 Page 175 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c.,eFigure 4-68Case 55 In-Plane Tube Inside DensityTube Excitation Ratio vs. Power Level Plot -R130 C881814-AA086-M0238, REV. 0Page 176 of 415 Page 176 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 4-69Two Cable Stabilizer Configuration1814-AA086-M0238, REV. 0Page 177 of 415 Page 177 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.5 FIV versus Power Level DiscussionAs discussed in Section 4.2, the missing AVB cases in Table 4-1 were run at the 100%, 80%,70%, 60% and 50% power levels. These cases are used to develop a basis for reduced poweroperation using a tube excitation criterion. The current ECT tube wear data was used todetermine an appropriate missing AVB case and then the FASTVIB results were extracted forthe various power levels for that case. Note that these cases are based on the number ofconsecutive AVB wear sites. It is known that the actual number ineffective AVB supports maybe larger; however, this approach is used only for comparison purposes. A more detailedevaluation addressing missing AVB supports without wear indications can be found in Section 9of this report.Tube excitation ratios were extracted for all power levels for both the out-of-plane and the in-plane direction. The tube excitation ratios focused on tubes with high wear and with supportconditions defined by tube wear found near the AVB locations. A plot of the maximum tubeexcitation ratio for all tubes with significant wear versus power level is shown in Figure 4-70.Note that the out-of-plane tube excitation ratio values above 1.0 are gap-limited and are notunstable in the classical sense. The displacements in the U-bend are limited by the gapbetween the tube and the AVB support. The largest displacements generally occur at the AVBsupport so the out-of-plane vibration can be classified as a rattling of the tube. In-planeinstability or instability in the straight leg is not gap-limited such that the tube is free to displacein the empty space between the tubes.1814-AA086-M0238, REV. 0Page 178 of 415 Page 178 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,c,eFigure 4-70Maximum Out-of-Plane and In-Plane Tube Excitation Ratio vs. PowerTubes with Wear >20%Note: The active tube with the largest excitation ratio is Row 128 Column 92 in SteamGenerator 2E088. This plot corresponds to ineffective AVB Case 45.1814-AA086-M0238, REV. 0Page 179 of 415 Page 179 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.6 Unit 3 100% Power FIV EvaluationA separate FIV evaluation was performed for the 100% power condition at SONGS Unit 3. Theoperating parameters for the first operating cycle are slightly different from the design case so aseparate ATHOS evaluation was performed. Cases 0 through 78 were evaluated to obtain out-of-plane and in-plane tube excitation ratios to be used to evaluate the as-found condition inUnit 3. Since several of the tubes appear to have AVB wear at all 12 AVB locations, Case 78was plotted in Figure 4-71 for the out-of-plane direction and Figure 4-72 for the in-planedirection.An additional comparison was performed comparing the Unit 2 100% power design conditionsto the Unit 3 100% power first cycle operating conditions. This comparison uses the sametubes used to compare Steam Generators 2E088 and 2E089 in Section 4.4. The missing AVBcase for Tube R1 11C81 was updated to be Case 61 since more eddy current data has becomeavailable for this tube since the 2E088 versus 2E089 comparison was performed. Thiscomparison was performed in Table 4-12. The results show that the differences in the tubeexcitation ratios are small and occur in the second decimal place. Therefore it can beconcluded that the differences in the thermal-hydraulic conditions between Unit 2 and Unit 3 arenot an explanation as to why the wear is much worse in Unit 3 than it is in Unit 2.1814-AA086-M0238, REV. 0Page 180 of 415 Page 180 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-71Out-of-Plane Tube Excitation Ratio Map -100% Power -Unit 3 -12 AVBs Missing(Case 78)1814-AA086-M0238, REV. 0Page 181 of 415 Page 181 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013 aceFigure 4-72In-Plane Stability Ratio Map -100% Power -Unit 3 -12 AVBs Missing(Case 78)1814-AA086-M0238, REV. 0Page 182 of 415 Page 182 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 4-12Tube Excitation Ratio Comparison Unit 2 vs. Unit 3 -100 % Power ConditionsOut-of-Plane Tube In-PlaneExcitation Ratio Excitation RatioRJC Description Case 2E089 3E088 2E089 3E088a,c,eR1 19C89 Active Tube in SG 2E089 46R133C91 Plugged Tube in SG 2E088 18Ri 1 1081 Tube with Tube-to-Tube 61Wear SG 2E0891814-AA086-M0238, REV. 0Page 183 of 415 Page 183 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134.7 References4-1 Westinghouse Letter LTR-SGDA-12-24, "San Onofre Units 2 and 3 MHI RSG Flow-Induced Vibration Evaluation Customer Correspondence," May 21, 2012.4-2 M. J. Pettigrew, C. E. Taylor, and B. S. Kim, "Vibration of Tube Bundles in Two-PhaseCross-Flow: Part I-Hydrodynamic Mass and Damping," Transactions of the ASMEVol. 111, Nov. 1989, pp. 466-477.4-3 F. Axisa, M. Wullschleger, B. Villard, and C. E. Taylor, "Two-Phase Cross-Flow Damping,"ASME Publication PVP Vol. 133, Damping-1988, ASME PVP Conference, Pittsburgh,Pa., June 1988.4-4 Standards of Tubular Exchanger Manufacturers Association, Tubular ExchangerManufacturers Association, Inc., 7th Edition, New York, NY.4-5 M. J. Pettigrew, R. J. Rogers, and F. Axisa, "Damping of Multispan Heat ExchangerTubes: Part 2 In Liquids," ASME PVP Publication PVP Vol. 104, Chicago, IL, July 20-24,1986, pp. 89-98.4-6 M. J. Pettigrew and C. E. Taylor, "Damping of Heat Exchanger Tubes in Two-Phase Flow,"ASME 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise AD Vol. 53-2, Nov. 16-21, 1997, Dallas, TX pp. 407-418.4-7 Westinghouse Report No. CN-SGMP-12-13, "Thermal-Hydraulic Analysis of the SanOnofre Nuclear Generating Station Units 2 and 3 Replacement Steam Generators,"May 2012.4-8 H. J. Connors, "Flow-Induced Vibration and Wear of Steam Generator Tubes," NuclearTechnology Vol. 55, Nov. 1981, pp.311-331.4-9 H. J. Connors, "Fluidelastic Vibration of Tube Arrays Excited by Nonuniform Cross Flow,"Flow-Induced Vibration of Power Plant Components -PVP-41 edited by M. K. Au-Yang,The American Society of Mechanical Engineers, New York, pp.93-107, 1988.4-10 "N-1331 Instability of Tube Arrays in Cross Flow," Nonmandatory Appendix N, ASMEBoiler and Pressure Vessel Code Section III, "Rules for Construction of Nuclear PowerPlant Components," 1998 Edition, The American Society of Mechanical Engineers, NewYork.4-11 D. R. Polak and D. S. Weaver, "Vortex Shedding in Normal Triangular Tube Arrays," Flow-Induced Vibration 1994, The 1994 Pressure Vessels and Piping Conference, Minneapolis,Minnesota, ASME Pressure Vessels and Piping Division Report PVP-Vol. 273,pp. 145-156, June 19-23, 1994.4-12 A. Zukauskas and V. Katinas, "Flow Induced Vibration in Heat Exchanger Tube Banks,"Proceedings of the IUTAM-IAHR Symposium on Practical Experiences with Flow-InducedVibrations, Karlsruhe, Editors E. Naudascher and D. Rockwell, Springer-Verlag, Berlin,pp. 188-196, 1980.4-13 D. S. Weaver, J. A. Fitzpatrick, and M. EI-Kashlan, "Strouhal Numbers for Heat ExchangerTube Arrays in Cross Flow," ASME Journal of Pressure Vessel Technology, Vol. 109,pp 219-223.1814-AA086-M0238, REV. 0Page 184 of 415 Page 184 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20134-14 H. J. Connors, "Vortex Shedding Excitation and Vibration of Circular Cylinders," paperpresented at the ASME Pressure Vessels and Piping Technology Conference, PVP-52,San Francisco, CA, Aug. 14, 1980, pp. 47-73.4-15 San Onofre Nuclear Generating Station Units 2 and 3 Replacement Steam GeneratorsMHI Design Drawings:A. L5-04FU001, Rev. 6, "Component and Outline Drawing 1/3".B. L5-04FU051, Rev. 1, "Tube Bundle 1/3".C. L5-04FU052, Rev. 1, "Tube Bundle 2/3".D. L5-04FU053, Rev. 3, "Tube Bundle 3/3".E. L5-04FU101, Rev. 5, "Wrapper Assembly 1/5"F. L5-04FU107, Rev. 3, "Tube Support Plate Assembly 2/3".G. L5-04FU108, Rev. 3, "Tube Support Plate Assembly 3/3".H. L5-04FU112, Rev. 1, "Anti-Vibration Bar Assembly 2/9".I. L5-04FU118, Rev. 3, "Anti-Vibration Bar Assembly 8/9".4-16 MHI Design Document L5-04GA581, Rev. 1, "San Onofre Nuclear Generating Station,Units 2 & 3 Replacement Steam Generators, Damping Test Result for Stabilizer."1814-AA086-M0238, REV. 0Page 185 of 415 Page 185 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20135.0 SONGS Unit 2 Eddy Current Summary and Review5.1 AVB/TSP WearAn eddy current results file for each Unit 2 SG was received from SCE on June 15, 2012. Theoriginal files, in csv format, are captured in Reference 5-1. A brief summary of the tube wear atAVB and tube support plate (TSP) indications is provided in Table 5-1.Table 5-1Tube Wear at AVBs and Tube Support Plate IndicationsSG 2E088 SG 2E089Maximum wear depth: AVB 35%TW 29%TWNumber of AVB wear indications 1757 2591Number of tubes with AVB wear indications 534 727Maximum wear depth: TSP 17%TW 20%TWNumber of TSP wear indications 225 139Number of tubes with TSP wear indications 181 119Maximum wear depth: Freespan (1) N/A 14Number of freespan wear indications (1) N/A 2Number of tubes with freespan wear indications (1) N/A 2(1): Based on field analysisThe 2012 results files were used to define the limiting tubes for the FIV analysis.Table 5-2 provides the eddy current results for the limiting active (unplugged) tubes. Thenumeric input data of Table 5-2 is based on the field bobbin coil analysis; the values representthe percent through-wall (%TW) of the wear indications at these locations. Westinghouseperformed a review of the +Pt data for tubes identified as limiting tubes for the wear analysisbased on the field bobbin coil analysis. This analysis scrutinized the +Pt data for detection ofwear at all AVB intersections for the purpose of defining the number of potential ineffective AVBsupport locations. In general, there was good agreement between the field analysis results andWEC review results. However, this review identified additional indications not reported from thefield bobbin coil and +Pt analyses. Such indications have low signal strength and a signalcharacter which implies that reporting may be reduced simply to individual analyst judgment.Such signals, which were scrutinized for the purposes of developing input data for the flow-induced vibration analysis, may not normally be reported during typical field analyses and areconsidered to contain shallow (i.e., typically <10%TW) depths. Such indications also would notbe classified as "missed indications," which typically have a connotation of significant depth withpossible tube structural or leakage integrity considerations.1814-AA086-M0238, REV. 0Page 186 of 415 Page 186 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 5-2Limiting Tube Eddy Current Input DataRow/Col SG Status A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 All A1297/87 88 Active X 11 25 23 16 X X119/89 89 Active X X 5 6 17 28 5 X121/91 89 Active X X 12 15 28 23131/91 89 Active 8 21 X 6 X129/93 89 Active X X 15 22 6126/90 89 Active 1 _1_5 5 12 21 21 X 14 X113/81 89 Plugged X 16 5 5 X X X111/81 89 Plugged X 14 8 13 18 X 7X: Low level wear observed on +Pt data from WEC review5.1.1 SG 2E088While the number of AVB wear indications is significant, the reported maximum depth is similarto the results reported for another plant with RSGs of similar size (St. Lucie Unit 2). Theobservation of TSP wear at the uppermost TSPs is somewhat atypical. In particular, there are anumber of TSP wear indications in the region where AVB wear is reported. TSP wear wasreported at the other plant with RSGs of this size, but primarily at lower TSP elevations andconcentrated on the periphery of the tube bundle.5.1.2 SG 2E089While the number of AVB wear indications is significant, the reported maximum depth is similarto the results reported for another plant with RSGs of similar size (St. Lucie Unit 2). Theobservation of TSP wear at the uppermost TSPs is somewhat atypical. In particular, there are anumber of TSP wear indications in the region where AVB wear is reported. TSP wear wasreported at the other plant with RSGs of this size, but primarily at lower TSP elevations andconcentrated on the periphery of the tube bundle. A larger number of AVB wear indications andnumber of affected tubes were reported for SG 2E089 but the number of top TSP wearindications and number of affected tubes was larger in SG 2E088 (see Table 5-1). While thenumber of top TSP wear indications was largest in SG 2E088, SG 2E089 contains a greaterdensity of these indications with the region affected by tube-to-tube wear in the Unit 3 RSGs.5.1.3 In-Plane Wear Indications (Wear Outside of A VB)Westinghouse performed a supplemental review of selected eddy current data as part of thesupport effort for the FIV analysis. This review included an investigation of AVB geometry (e.g.,AVB symmetry variance at individual tube-AVB intersection locations) and AVB wear data usingthe available +Pt data for all SG 2E089 tubes with bobbin coil indicated depths of 20%TW orgreater, all other tubes in Columns 81 and 82 between Rows 120 and 110, and the identifiedlimiting tubes for the FIV analysis. The SG 2E088 review included the identified limiting tubesfor the FIV analysis, which includes both tubes with 35%TW indication depths. Both the hot andcold leg +Pt RPC data for these tubes were reviewed (if available). A total of 70 tubes in1814-AA086-M0238, REV. 0Page 187 of 415 Page 187 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013SG 2E089 encompassing 394 bobbin reported indications and 6 tubes in SG 2E088encompassing 41 bobbin reported indications were reviewed.This review concluded, or observed that:1. All wear at the AVBs was found to be contained within the width of the AVBs.2. For tubes with single-sided or both single- and double-sided AVB wear indications,the majority of single-sided AVB wear indications were found on one flank (side) ofthe tube.3. For tubes with the single-sided wear not on the same flank, the side orientation of theindications was grouped. That is, wear could be observed at AVB2 on one flank,with wear at AVB3, AVB4, AVB5, and AVB6 on the opposite flank.4. AVB symmetry variance (i.e., the variance in spatial elevation of a pair of AVBs for aparticular tube) at AVB6, AVB1, and AVB7 had the largest amount of variance asindicated by the 95th percentile variance value (0.32, 0.25, and 0.23 inch,respectively); the variance at all other AVBs was approximately equal.5. The most extreme AVB symmetry variance of 0.50 inch was not associated withwear at that AVB.The limiting AVB symmetry variance of 0.50 inch was reported on R100 C76 at AVB3 and avariance of 0.35 inch was reported at AVB4 on the same tube. Since the +Pt data for no othertubes in the vicinity of R100 C76 were reviewed, the +Pt data of R124 C76 and R76 C76(separated by the tube in question by 23 ptiches in each direction) was reviewed to determine ifthe alignment variance varied linearly over this span. If the symmetry variance was found to notvary linearly, it could be an indicator of deformed AVBs. On R124 C76, the variance at AVB3was 0.29 inch, at AVB4, 0.18 inch, on R76 C76 at AVB3, 0.53 inch, at AVB4, 0.42 inch. Thuswhile the amount of symmetry variance appears large, the trending over the range from Row124 to Row 76 appears to indicate that the AVBs are not deformed through their strongestsection.5.1.4 A VB Insertion Depths for Column 81 and Tube Denting at A VB ObservationsA total of 173 dented locations were reported in SG 2E089 based on the field analysis. Dentswere reported only at AVB2, AVB3, AVB7, AVB10, and AVB11. Denting patterns werereviewed to determine if any relationship between denting, suspected to be related to atypicalAVB twist conditions, could be observed for Column 81. In SG 2E089, denting at AVBs is notreported for Column 81. In Columns 80 and 82, dents are reported on the Row 32 tube at AVB2and AVB3 and AVB10 and AVB11 on R32 C82. However, nearly all columns from 22 to 160contain dents near the AVB2/3 or AVB10/11 bend region. Thus it is difficult to associate apotential for freespan tube wear, larger dent AVB wear, with the observed dent patterns.Additionally, the observance of dents concentrated in Rows 30, 31, and 32 would not beexpected to influence tube vibration performance resulting in the observed AVB wear patterns,which show that the majority of the AVB wear is located in higher row tubes. The dents arejudged too far removed from the wear locations to be of significance. In addition, the fieldreported dent voltages show a maximum of only 2.04 volts, which represents a relatively smallphysical dent size. At AVB7, the dent pattern is more sporadic; denting at AVB7 was notreported for Columns 72 through 93. A review of the bobbin coil data for a sampling of AVB2/31814-AA086-M0238, REV. 0Page 188 of 415 Page 188 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013field reported dent locations indicates that the dents are located on the outboard edge of eachAVB. That is, at AVB2, the dents are on the edge towards AVB1 and at AVB3, the dents are onthe edge towards AVB4, suggesting that the source of the dent signals is related to AVBflatness near the bend region.AVB insertion depths were investigated for AVB2/AVB3 and AVB1 0/AVB1 1 on Columns 80, 81,and 82. In accordance with the design drawing, the AVB insertion depth for these columnsshould be to Row 27. The Row 28 tubes had 10 distinct structure signals, with a return to nullbetween each structure signal (suggesting insertion depth of lower than Row 27). On Row 27(one tube reviewed), 10 AVBs were observed, and on Row 26 tubes, 8 AVBs were observed. Atotal of 6 AVBs were observed on a Row 25 tube. This suggests that for the gaps between tubeColumns 80/81 and 81/82, the AVB insertion may be slightly deeper than by design. AVBinsertion depth would only be expected to negatively affect performance if the insertion depthwas less than design.5.1.5 Estimate of the Number of Ineffective SupportsThe field eddy current results for the bobbin coil PCT calls and the +Pt coil WAR calls wascombined for each tube inspected with both coils. If wear at an AVB was considered to be anindicator of lack of support, the combined bobbin and +Pt RPC data would then provide themost accurate assessment of wear at all AVB locations. The Unit 3, SG 3E088 list of tubes withfreespan wear was considered for the Unit 2 SGs so that a direct comparison between the twounits could be performed. Cumulative probability distribution plots (histograms) of the frequencyof occurrence were plotted against the potential number of AVB wear sites, 1 through 12. Thisplot, provided on Figure 5-1, shows that there is a systematic difference in the number of wearsites per tube between the two units. The Unit 2 data are clearly normally distributed, whichwould be expected for typical SG assembly conditions. It is reasonable that some varianceabout the mean would be expected, and that this variance is normally distributed. On the otherhand, the Unit 3 distributions are clearly not normally distributed with substantially larger 50thand 95th percentile wear site per tube values. This could suggest that there is a systematicdifference in the support conditions between the two units. Note also that had Unit 3 operatedfor the entire planned period of 22 EFPMs, additional indications could have initiated, thusincreasing the mean value of the number of wear sites per tube.5.2 Tube-to-Tube Wear and Proximity Review5.2.1 Initial Tube-to-Tube Proximity ReviewWhen tube-to-tube wear was reported at Unit 2, a limited number of tubes (approximately 100)from the Unit 2 PSI were reviewed using bobbin coil methods developed by Westinghouse. Theintent of this review was to use laboratory eddy current data to determine proximity conditions.These methods were developed for another plant that uses the same size tubing as SONGS. Inaddition, the tubing was fabricated by Sumitomo, the manufacturer of the SONGS tubing, andthe laboratory tubing specimens used were from the archive tubing set for this plant. The initialUnit 2 proximity review focused on tubes in Columns 80, 81, and 82 in the area of the tube-to-tube wear with additional tubes examined in Columns 83 through 87, primarily in lower rowtubes to determine if the proximity condition was associated with the vertical straight legindexing.1814-AA086-M0238, REV. 0Page 189 of 415 Page 189 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Observable proximity was reported on R115 C81, R113 C81, and R111 C81, with the minimumtube-to-tube gap between R115 and R113 of 0.03 to 0.05 inch and between R113 and R1ll of0.11 inch. Proximity signals were also reported on R112 C82 and R110 C82. Numerousproximity reports were noted in Column 81, from Row 125 to Row 105; the location of theproximity reports on these tubes were all at the same approximate elevation, from about themiddle of the AVB9 to AVB10 span to just below AVB10. Based on the amplitude of thesesignals, the proximity ranged from [ ]a.bc inch. Similar proximity signals (in bothamplitude and location) were also reported in the same rows in Column 80. During theWestinghouse Engineering visit to the site in May 2012, those tubes with proximity signals in thePSI were reviewed in the ISI data and no proximity was noted. Discussion is provided belowwhich indicates that the results of this review of the ISI data cannot be used to make globaljudgments about the SG 2E089 proximity condition.5.2.2 Supplemental Proximity ReviewSCE provided Westinghouse the raw eddy current data for the PSI and ISI inspections. Acomplete proximity review of the SG 2E089 ISI bobbin data was performed. The results areprovided in Figure 5-2. A total of 475 proximity signals were reported from this review. Themajority of these proximity signals (60%) are located on the cold leg side of SG 2E089. The 25largest proximity signals (with regard to bobbin coil signal amplitude) were reviewed in the PSIdata. Proximity signals were present in the PSI for all 25 signals. Surprisingly, the ISI proximitysignal voltages were increased for most of these. This is contrary to proximity data for otherSGs in that when the SGs are oriented vertically, the proximity signals are either reducedcompared to the PSI, or cannot be observed in the ISI data. Figure 5-3 presents a plot of allproximity reports of 1 volt or greater (0.06 inch proximity gap or less) for SG 2E089. Note thatthe majority of these reports are on the cold leg side of the SG. Those tubes with reportedbobbin coil wear of 20%TW or greater are also plotted on Figures 5-2 and 5-3 to show therelation, if any, between these data sets. Based on these plots, there does not appear to be astrong relationship between proximity and deeper AVB wear depths. Figures 5-2 and 5-3include dent locations at AVBs. There appears to be a weak relationship between tube columnswith dents at AVBs and deeper AVB wear depths.The number of proximity reports for SG 2E089 was judged significant enough to warrant areview of the SG 2E089 PSI, SG 2E088 ISI, and SG 2E088 PSI data for all tubes in Rows 80and higher in Columns 50 through 110. Comparison of the SG 2E089 ISI and PSI proximityresults for Columns 50 through 110 shows that there are 363 proximity reports for the ISI and334 proximity reports for the PSI.When comparing the ISI and PSI proximity locations, a trend of "shifting" proximity wasobserved. That is, if proximity signals were observed in the PSI in a particular column in arange of rows, e.g., 92 to 98, the ISI showed proximity was not observed at the PSI tubelocations but in rows either above or below the PSI reporting in the same column. Thus,proximity signals were reported at the other inspection in, for example, Rows 88 and 90, or 100and 102. Another observation of the proximity review was that proximities could be observed ona set of tubes on one leg in the PSI, but on the same tubes on the opposite leg in the ISI. TheWEC Engineering review of SG 2E089 indicated that a number of larger voltage proximitiesfrom either the PSI or ISI did not have corresponding signals in the opposite inspection after theinitial data analysis. That is, a large proximity voltage was reported in the PSI but nocorresponding report was present in the ISI data analysis report. A total of 14 of these signals1814-AA086-M0238, REV. 0Page 190 of 415 Page 190 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013were reviewed again to ensure that the data analysis was correct; none had proximity signals inthe other inspection.The proximity review for the SG 2E088 ISI data indicates only 141 proximity reports inColumns 50 through 110, while the PSI data indicates 505 reports for those same columns. Asfor SG 2E089, the trend of shifting proximity, both within the same column and from leg to legwas also observed in SG 2E088. Figure 5-4 presents the plot of the SG 2E088 proximityreports based on the ISI data. Due to the limited number of proximity reports, the plottingscheme was based on the leg, opposed to individual AVB span regions, as was done for Figure5-2.The tube-to-tube proximity methods developed by Westinghouse are based on laboratory work.This effort also considered proximity detection capabilities of RPC (+Pt and pancake coil)probes. The +Pt probe has reduced proximity detection capabilities compared to the bobbinprobe; for tube-to-tube gaps of greater than about [ ]a,b,c inch, the +Pt coil failed to detect thetube proximity condition. Once the bobbin proximity results of the SG 2E089 ISI were available,those .tubes tested with the +Pt probe through the entire U-bend region were compared withthose tubes with bobbin proximity signals. The +Pt data for four tubes with greater than 1 voltbobbin proximity responses were reviewed; proximity was confirmed with the +Pt coil for alllocations. Thus, the +Pt results validate the bobbin results. Figure 5-5 provides a +Pt terrainplot of one of these locations. Based on the Westinghouse laboratory work, a +Pt signalamplitude of 0.56 volt (see Figure 5-5) represents a tube-to-tube proximity gap of [ ]a.bc inch;based on the bobbin coil proximity signal amplitude the tube-to-tube proximity gap is estimatedat [ ]a,b,c inch. Of the 475 ISI proximity signals reported, 39 exceeded the laboratory signalamplitude associated with single tube-to-tube contact. The source of these larger signals maybe the result of adjacent tubes in the inboard and outboard columns which happen to be in theproximity detection range.Numerous tubes were reported with "SSA" codes during the SG 2E089 ISI, which also includePRX codes in the results file UTIL1 field; thus, proximity conditions were reported during the IS.Hence, the proximity conditions were initially reported, but not studied at the level of detail ofthis report.5.2.3 Review of Field Reported Wear on R113 C81 and R111 C81 in Unit 2 SG 2E089The reported freespan wear on R113 C81 and Rlll C81 in SG 2E089 was not originallyreported from the bobbin coil analysis. The bobbin coil channel6 signal amplitude is only0.30 volt at 40 degrees phase.During the review of the AVB wear scars discussed above, it was observed that the signalresponse of the tube-to-tube wear reported on R113 C81 and R111 C81 did not exhibit a signalresponse expected of volumetric degradation. The phase angle response did not show theexpected rotation over the range of test frequencies at the middle of the axial flaw length. Thephase angles ranged from 55 to 41 degrees for the normal range of differential frequencies (400to 100 kHz), with little or no distortion of the lissajous. These phase angle responses are out ofthe flaw plane for outside diameter (OD) volumetric degradation. In addition, the phase angleresponse had little or no variance over the length of the flaw. Since the depth would beexpected to vary over the length of the flaw, a phase angle shift according to the local flawdepth would be expected. Figure 5-6 presents a multi-frequency plot for the signal on R1 131814-AA086-M0238, REV. 0Page 191 of 415 Page 191 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013C81. Figure 5-7 presents a terrain plot of the Ri 13 C81 signal at the center of the suspectedflaw.The R1 13 C81 and R1 11 C81 +Pt signals were compared with similar depth signals from Unit 3based on +Pt analysis. Tube location R107 C75 from SG 3E088 was reviewed. This tube hadtwo reported tube-to-tube wear signals on the hot leg side, one on the intrados and one on theextrados. Extension of the AVB4 wear scar into the freespan was also observed (due to in-plane tube motion). The signal response of this flaw (extended AVB wear flaw) rotates asexpected over the range of test frequencies; see Figure 5-8. One of the +Pt flaw signalsexhibited responses nearly identical to the AVB wear extension, the other exhibited responselike that on R113 C81 and Rill C81. Figure 5-9 presents a full scan line terrain plot of anelevation crossing of both of the freespan flaws. Note the difference in the two signal responsesdisplayed in the analysis window. Figure 5-10 shows that the signal similar to the signals onR113 C81 and R1ll C81 of SG 2E089 contains a wider, larger amplitude signal (0.36V) nearthe center of the indication. At this location there is no phase angle change or signal distortioncompared to the remainder of the signal. A typical wear signal is located along the sameazimuth as this non-typical signal just below the non-typical signal. Figure 5-11 shows theisolated response of the suspect signal on R107 C75.The +Pt eddy current data of ETSS 27902.2 was reviewed to compare the Ri13 C81 andR111 C81 signals against known flaws of shallow depth. The flaws of this ETSS are axiallyoriented volumetric degradation and the flaws were produced using a 1/8 inch diameter ball endmill. Thus, these flaws are the most representative industry data with regard to tube-to-tubewear. The data for shallow (5 to 15%TW) flaws of ETSS 27902.2 were reviewed. The signalresponses were typical for volumetric degradation. For the 5%TW flaw, the phase angle shiftbetween the 300 kHz differential and 100 kHz differential channels was 66 degrees, from 126 to60 degrees, while the 300 kHz voltage response was only 0.05 volt. For the 11 %TW flaw, thephase angle shift between the 300 kHz differential and 100 kHz differential channels was33 degrees, from 106 to 73 degrees, while the 300 kHz voltage response was only 0.17 volt.For the 15%TW flaw, the phase angle shift between the 300 kHz differential and the 100 kHzdifferential channels was 42 degrees, from 96 to 54 degrees, while the 300 kHz voltageresponse was 0.21 volt. Therefore, this comparison establishes that the +Pt signal responses ofR113 C81 and R1ll C81 are not similar to the +Pt coil responses of known, shallow, axiallyoriented degradation.Finally, a section of 0.75 inch OD x 0.043 inch wall thickness Alloy 690 archive tubing fromanother plant was modified to include an extended length, shallow (12%TW maximum) wearscar. The flaw was produced using a 0.75 inch diameter ball end mill. The flaw included a shortsection with uniform depth and end tapers cut at a 0.30 degree taper to runout at the tube ODsurface. The tube was eddy current tested using both bobbin and RPC probes. The RPCprobe used was a dual coil pancake/+Pt U-bend probe. The +Pt 300 kHz amplitude responsewas [ ]a,b,c degrees; the phase angle rotation was normal for OD volumetricdegradation. The pancake coil response was [ ]a,b,c degrees for the entrance leg.The bobbin coil channel6 amplitude was [ ]a.b,c degrees. Figure 5-12 and Figure 5-13 provide the +Pt responses for the laboratory simulation. Figure 5-14 and Figure 5-15 providethe pancake coil responses for the laboratory simulation. Figure 5-16 provides the bobbin coilchannel6 response for the laboratory simulation. Note there is a distinct entrance and exitsignal. Figure 5-17 presents the bobbin coil channel6 response for R1 11 C81. Note there is noexit signal, only a shift in the null point. Note that the bobbin coil channel6 response includes a1814-AA086-M0238, REV. 0Page 192 of 415 Page 192 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013similar signal between A06 and A07; review of the +Pt data at this location shows an NDD (NoDetectable Degradation) condition.Various attempts were made to simulate the +Pt response of approximately 40 degrees at 0.20volt in 300 kHz. These included; a 0.5 mil extended length dent produced by rolling anothertube against the test tube while applying a downward force, extended length surface scratches,and impact denting using a round bar oriented at a shallow angle to the test tube axis. Theimpact dent produced a somewhat similar response with a phase angle of approximately 15degrees; however, the phase rotation observed on R113 C81 and R1ll C81 could not bereproduced. RPC testing of small radius U-bends has shown that normal horizontal noiserotation of 15 to 25 degrees can be observed as the probe passes through from the straightsection through the U-bend. However, this phenomenon has never been studied in largerradius U-bends.In summary, the review of the R1 13C81 and R1 11 C81 freespan signals shows:1. Bobbin coil channel6 signal amplitudes have similar character, but of a lesser amplitudethan a long shallow tapered wear scar of similar (12%TW) depth,2. +Pt signal responses of R113 C81 and Rlll C81 are not similar to axially orientedvolumetric degradation of similar depths contained in ETSS 27902.2,3. Pancake coil amplitudes for long shallow tapered wear of similar depth as estimated forthese tubes are twice the +Pt amplitude, but the pancake coil data for R113 C81 andR1 11 C81 shows no evidence of degradation,4. The +Pt phase angle response of R113 C81 and Rlll C81 lies outside of the ODvolumetric flaw plane and does not rotate through the test frequencies as expected,5. The characteristic signal of these suspected flaws is not similar to freespan wear whichextends out of the AVBs (Unit 3 experience).It was theorized that if the +Pt signals on Ri 11 C81 and Ri 13 C81 in SG 2E089 were in factassociated with freespan volumetric degradation, that one possible explanation for the observedsignal characteristics was due to the signal combination of a ding (dent) signal and shallow flawsignal. The combination of these two signal responses could produce a resultant signal asobserved on these tubes.Based on these observations, SCE performed additional eddy current inspections of thesetubes using the Ghent-3/4 transmit-receive probe and ultrasonic testing (UT) methods. TheGhent-3/4 data suggests that the signal is most likely attributed to a combined ding-flawresponse. The UT effort also confirmed the presence of shallow OD volumetric degradation.Therefore, it can be concluded that the source of the +Pt signals on R1 11 C81 and R1 13 C81 inSG 2E089 are associated with very shallow depth freespan OD volumetric degradation, with ageometric influence such as a ding-like signal of extended length. It should be noted that thecharacteristics of these signals are markedly different from the majority of the freespan ODvolumetric degradation signals observed in the Unit 3 RSGs. Also, as the field +Pt signal depthsizing returned a depth of 14%TW, and this signal contains both ding and flaw components, thetrue. depth of the indications are likely <1 0%TW.1814-AA086-M0238, REV. 0Page 193 of 415 Page 193 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20135.3 Tube Plugging SummaryFiles provided by SCE identify tube plugging and stabilization. These files are reproduced inTable 5-3 for SG 2E088 and Table 5-4 for SG 2E089. The plugging and stabilization statusshown in Tables 5-3 and 5-4 were current as of June 2012. Due to ongoing SG recovery efforts,the plugging and stabilizing strategy are subject to change. The numbers shown in these tablesmay change prior to startup. Note that 5 additional tubes (2 in SG 2E088 and 3 in SG 2E089)were plugged as a result of the recently completed analysis. These tubes are identified inTable 9-6 under the columns labeled 70% power. Due to the small number of affected tubes,plugging these 5 additional tubes will have an insignificant impact on the SG thermal-hydraulicresponse or the FIV response of the tubes.A total of 205 tubes were plugged in SG 2E088, 125 of these had stabilizers of varying lengthinstalled.A total of 305 tubes were plugged in SG 2E088, 226 of these had stabilizers of varying lengthinstalled.5.4 Summary of Unit 3 Eddy Current ReviewA review of the Unit 3, SG 3E088 +Pt data for tubes with and without freespan wear wasconducted. The review concentrated on the AVB wear signals. As tube-to-tube wear wasalready known in SG 3E088, and extension of the wear outside of the AVBs was confirmedvisually, a review of this data to determine if extension of the wear scars was occurring isacademic. Instead the review concentrated on the direction of the wear extension (i.e., towardswhich AVB was the wear oriented). If the tube is experiencing in-plane displacement in thevicinity of AVB3, and the direction of the tube motion is towards AVB2, or towards the nexthighest row, wear at AVB3, which extends outside of the boundary of the AVB, would bedirected towards AVB4.The initial review was focused on those tubes with tube-to-tube wear and the fewest number ofAVBs with wear reported by the bobbin coil. These tubes would be expected to be the mostchallenging for simulation of in-plane displacement using the Westinghouse FIV models. Thesetubes are typically the lowest and highest row tubes in a column with tube-to-tube wear. Thesetubes were termed "boundary" tubes. It is possible that these tubes are stable with regard to in-plane displacement and that the observed wear is generated by the in-plane displacement of anadjacent tube. Thus, the review was extended to include adjacent (same column) tubes alsoreported with tube-to-tube wear. As it would be advantageous for refinement of the FIV model,selected columns of tubes were also reviewed beginning at row locations just outside of thetube-to-tube wear region, through this region, and just outside of the region at the opposite side.In other words, if tube-to-tube wear was reported in Column 78 on Rows 90 to 100, the reviewwould include tube locations R90 to R100 in C78, plus, R86 and R104 in Column 78. It wasjudged that this review would provide insight about the tube motions and thus vibration modeshapes.As with the Unit 2 review, all AVB intersections with observable wear were identified, if theintersection contained single- or double-sided wear, if the wear scars were flat (uniformly deepdepth profile) or tapered, if there was any AVB symmetry variance of adjacent AVBs, and if so,this variance was measured, All wear at an AVB intersection was reviewed to determine if thewear extended outside of the AVB edges, and if extended, the distance outside of the AVB that1814-AA086-M0238, REV. 0Page 194 of 415 Page 194 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013the wear scar extended, and the direction of the wear extension (towards which AVB). Thesummary of observed wear was provided to the analysts performing the FIV analysis forrefinement of the FIV model.Figure 5-18 presents a tubesheet map identifying those tubes included in this review; data for all12 AVBs was reviewed.5.4.1 Observations Related to A VB Symmetry Variance and Wear Scar GeometryCompared to Unit 2, the observations of AVB symmetry variance were not as prevalent in Unit3. The observation of tapered wear, suggestive of rotational twisted AVBs, was observed lessfrequently compared to Unit 2.The wear mode, either single- or double-sided, was also tracked and compiled. For the tubesreviewed, it was observed that those tubes with tube-to-tube wear had a much higher incidenceof double-sided AVB wear. For those SG 3E088 tubes with tube-to-tube wear that werereviewed, 57% of the AVB locations with wear exhibited double-sided wear. For thoseSG 3E088 tubes with tube-to-tube wear, 23% of the AVB locations with wear exhibited double-sided wear. For SG 2E089, 27% of the AVB locations with wear exhibited double-sided wear.5.4.2 Observations Related to Tube MotionsFor each tube reviewed, a "motion plot" was prepared which identifies the direction of the tubedisplacement. Note that the direction of the tube displacement is opposite to the direction of theAVB wear scar extension. These plots were used to help to define the tube vibration modeshapes. An example of these plots is provided on Figure 5-19. The general observationsregarding these plots was that for the boundary tubes, the displacement direction was onlytowards one side (leg) of the tube, and the number of AVB wear scars which extended from theAVB were fewer compared to tubes located more in the middle of the tube-to-tube wear region.With regard to the direction of the tube displacement, the boundary tubes which had extensionof the AVB wear scar outside of the AVB was strongly preferenced towards the increasing rowdirection, or towards the hot leg periphery. In the middle of the tube-to-tube wear region, thetubes showed a much greater propensity to experience a back-and-forth motion, or "framemotion." This back-and forth motion was observed at AVB3 through AVB10, with AVB5 throughAVB8 showing this phenomenon more frequently than other locations.5.4.3 Observations of Wear at the Top TSPWear characteristics at the uppermost TSPs were reviewed for a limited subset of tubes with thepurpose of attempting to show a distinguishing feature between the wear at this location for thetwo units. It was previously established that the magnitude (depth) of the uppermost TSPs inUnit 3 is significantly greater than Unit 2 (by about a factor of 3). However, if a distinguishingcharacteristic is present in both units, it could be an indicator of incipient susceptibility in Unit 2,at 100% power conditions.The +Pt data for the following locations was reviewed to attempt to identify uppermost TSP weartrends.1814-AA086-M0238, REV. 0Page 195 of 415 Page 195 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013SG2E088R109 C79R113 C8107H*07H*SG2E089R131 C57R112 C82R112 C84R90 C84R109 C85R117 C87R95 C9107H07C07C07H07H07H07H*SG3E088R112 C74R112 C74R102 C76R100 C78R100 C76R106 C78R106 C78R120 C78R120 C78R93 C85R93 C85R109 C85R103 C89R103 C89R93 C75R85 C8507C07H07H07C07H07C07H07C07H07C07H07H07C07H07H**07H***: Active tube**: Tube did not contain tube-to-tube wearThe TSP design is such that the extrados of the tube is coincident with a TSP contact land. The+Pt data was interrogated using the AVBs as a reference point to then identify the tubeextrados, as a contact land would always be centered between two AVBs. This contact landwas classified as the 0 degree position for this study. The other contact lands would then beoriented at 120 and 240 degrees. For this study, the contact lands will only be referred tosingularly as flanks. The TSP wear indictions were characterized by first recording the numberof lands with adjacent wear, if the deepest part of the wear was at the top or bottom edge of theTSP, if the wear was uniformly deep or tapered, and a relative wear length categorizedgenerally by the TSP thickness in 1/4 thickness increments (i.e., 1/4, Y2, % or 1.0 relative TSPthickness).SG 2E088For both tubes reviewed, the TSP wear was located at 07H, only the 0 degree land had wear,the deepest depth was at the bottom of the TSP, the profile was flat, and the length was 1/4 ofthe TSP thickness. The observation of flat wear may be an artifact of the shallow depth, or,could imply that the tube was wearing along the face of the chamfer.SG 2E089As the deepest reported TSP wear was only 20%TW, it would be expected that the developedwear lengths were less than the TSP thickness, especially since the large edge chamfer appliedto the TSP would not permit full length wear if the tubes were not experiencing some amount ofrotation at the top TSPs.Of the seven tubes reviewed, five had the deepest wear oriented at 0 degrees. For most, thedeepest depth occurred at the bottom edge of the TSP. For R109 C85, the deepest depthoccurred on a flank land and appeared to be coincident with the edge of the chamfer near the1814-AA086-M0238, REV. 0Page 196 of 415 Page 196 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013center of the TSP. The relative lengths were mostly reported at /2 of the TSP thickness, andmost exhibited a tapered profile. The only tube on which the deepest depth was reported at thetop edge of the TSP was R131 C57; the deepest wear depth was reported on a flank land. Ifwear was observed on more than one land, and the deepest depth was observed at the bottomedge of the TSP, the deepest depth of the wear on the other lands was observed at theopposite edge of the TSP.SG 3E088The deepest depths were overwhelmingly observed at the 0 degree land, and at the bottomedge of the TSP. Most of the wear exhibited a tapered profile, and many extended for the fullthickness of the TSP. Of the 16 locations reviewed, only 3 were found to have the deepestdepth on a flank land. These were R106 C78 at 07C, R103 C89 at 07C and R103 C89 at 07H.With the exception of the tubes which did not contain tube-to-tube wear, wear was observed on2 or 3 of the lands. The overwhelming observation that the deepest depth of wear was reportedat the edge of the TSP suggests one of two scenarios. Either some amount of TSP rotation isoccurring, which then causes the tube to interact with the edge of the TSP, thus overcoming theeffects of the chamfer applied to the top and bottom surfaces of the TSPs, or, the tube isexperiencing significant rotations.One interesting observation was made for the wear at 07H on R106 C78. Single-sided AVBwear was observed at AVB5. The deepest wear was observed on the 0 degree land. Of thetwo flank lands, one had a deeper depth than the other. The wear located on the deeper of thetwo flank lands was consistent with the side of the tube that experienced the wear at AVB5.Another observation was that the elevations of the edges of the wear scars were not coincidentwith the edges of the TSPs. Figures 5-20, 5-21, and 5-22 show this for R93 C85 of SG 3E088at the 07H location. Figure 5-20 provides the +Pt terrain plot of the lower edge of the TSP. Thecursor (white arrow) is located at the edge of the wear, notice that the cursor location is slightlybelow the TSP edge in the lower plot. The cursor position remains consistent throughout eachplot. Figure 5-21 provides the +Pt terrain plot of the upper edge of the TSP. The cursor (whitearrow) is located at the edge of the TSP, notice that the cursor location is slightly above theedge of the wear in the upper plot. Figure 5-22 provides the +Pt terrain plot of the TSP edgeshowing the vertical offset distance between the top edge of the TSP and edge of the wear.The +Pt scale was normalized to the TSP thickness, thus, the offset amount of 0.26 inch isjudged to be representative. Such a condition would be expected based on the difference inthermal expansion coefficients between the tube and tube support structure. Notice that thedeepest portion of the wear (shown by the amplitude of the wear signals) is located at the edgeof the wear length. This condition could then only be observed if the tube were experiencinglarge rotations as the edge chamfer applied to the TSP would have to be overcome by the tuberotation. The observation that the deepest wear was observed on the 0 degree land implies thatthere is a difference in depth on the flank lands. As one of the flank lands is not only deeper butlonger than the opposite flank land can imply that the the tube is experiencing both in-planedisplacement as well as out-of-plane displacement where the tube is preferentially deflected toone side. Figure 5-23 presents the motion plot of R93 C85. Note that the wear extension atAVB5 is in both directions.Table 5-5 provides a summary of the results of this review.1814-AA086-M0238, REV. 0Page 197 of 415 Page 197 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20135.5 References5-1 LTR-SGMP-12-41, "In-Service Eddy Current Inspection Results for SONGS 2 and 3Provided by SCE," July, 2012.1814-AA086-M0238, REV. 0Page 198 of 415 Page 198 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 5-3SG 2E088 Tube Plugging and Stabilization ListU2 NECP 800873488U2 NECP 800873488RSG 2E-088 Tube Plugging & Stabilizing Map/ListRSG 2E-088 Tube Plugging & Stabilizing Map/ListStabRow Col Plug Stab ReasonLe ngth108 34 Yes No Preventative -Retainer Bar111 35 Yes No Preventative- Retainer Bar110 36 Yes No Preventative -Retainer Bar112 36 Yes No Preventative -Retainer Bar111 37 Yes No Preventative -Retainer Bar113 37 Yes No Preventative -Retainer Bar112 38 Yes No Preventative -Retainer Bar114 38 Yes No Preventative -Retainer Bar113 39 Yes No Preventative -Retainer Bar115 39 Yes No Preventative -Retainer Bar114 40 Yes No Preventative- Retainer Bar116 40 Yes No Preventative -Retainer Bar115 41 Yes No Preventative -Retainer Bar117 41 Yes No Preventative -Retainer Bar116 42 Yes No Preventative -Retainer Bar118 42 Yes No Preventative -Retainer Bar117 43 Yes No Preventative -Retainer Bar119 43 Yes No Preventative -Retainer Bar118 44 Yes No Preventative -Retainer Bar120 44 Yes No Preventative -Retainer Bar119 45 Yes No Preventative -Retainer Bar122 46 Yes No Preventative -Retainer Bar121 47 Yes No Preventative -Retainer Bar123 47 Yes No Preventative -Retainer Bar122 48 Yes No Preventative -Retainer Bar123 49 Yes No Preventative -Retainer Bar124 50 Yes No Preventative -Retainer Bar126 50 Yes No Preventative -Retainer Bar125 51 Yes No Preventative -Retainer Bar127 51 Yes No Preventative -Retainer Bar126 52 Yes No Preventative -Retainer Bar128 52 Yes No Preventative -Retainer Bar127 53 Yes No Preventative -Retainer Bar129 53 Yes No Preventative -Retainer Bar128 54 Yes No Preventative -Retainer Bar130 54 Yes No Preventative- Retainer Bar129 55 Yes No Preventative- Retainer Bar131 55 Yes No Preventative- Retainer Bar131 57 Yes No Preventative- Retainer Bar131 121 Yes No Preventative- Retainer Bar129 123 Yes No Preventative- Retainer Bar131 123 Yes No Preventative- Retainer Bar128 124 Yes No Preventative- Retainer Bar130 124 Yes No Preventative -Retainer Bar127 125 Yes No Preventative -Retainer Bar129 125 Yes No Preventative -Retainer Bar126 126 Yes No Preventative- Retainer Bar128 126 Yes No Preventative -Retainer Bar125 127 Yes No Preventative -Retainer Bar127 127 Yes No I Preventative -Retainer BarRow Col Plug Stab Stab ReasonLength126 128 Yes No Preventative -Retainer Bar123 129 Yes No Preventative- Retainer Bar125 129 Yes No Preventative -Retainer Bar122 130 Yes No Preventative -Retainer Bar124 130 Yes No Preventative -Retainer Bar121 131 Yes No Preventative -Retainer Bar123 131 Yes No Preventative -Retainer Bar122 132 Yes No Preventative -Retainer Bar119 133 Yes No Preventative -Retainer Bar118 134 Yes No Preventative -Retainer Bar120 134 Yes No Preventative -Retainer Bar117 135 Yes No Preventative -Retainer Bar119 135 Yes No Preventative -Retainer Bar116 136 Yes No Preventative -Retainer Bar118 136 Yes No Preventative -Retainer Bar115 137 Yes No Preventative -Retainer Bar117 137 Yes No Preventative -Retainer Bar114 138 Yes No Preventative- Retainer Bar116 138 Yes No Preventative -Retainer Bar113 139 Yes No Preventative -Retainer Bar115 139 Yes No Preventative -Retainer Bar112 140 Yes No Preventative -Retainer Bar114 140 Yes No Preventative- Retainer Bar111 141 Yes No Preventative -Retainer Bar113 141 Yes No Preventative -Retainer Bar110 142 Yes No Preventative -Retainer Bar112 142 Yes No Preventative -Retainer Bar111 143 Yes No Preventative -Retainer Bar108 144 Yes No Preventative -Retainer Bar110 34 Yes Yes 668 Preventative -Retainer Bar109 35 Yes Yes 668 Preventative -Retainer Bar121 45 Yes Yes 668 Preventative -Retainer Bar120 46 Yes Yes 668 Preventative -Retainer Bar124 48 Yes Yes 668 35% < TWD125 49 Yes Yes 668 35%: <TWD130 56 Yes Yes 668 Preventative -Retainer Bar132 56 Yes Yes 668 Preventative -Retainer Bar121 81 Yes Yes 668 Preventative -FSW120 82 Yes Yes 668 Preventative -FSW105 83 Yes Yes 668 Preventative -FSW107 83 Yes Yes 668 Preventative -FSW98 84 Yes Yes 668 Wear at 6 Continuous AVBs104 84 Yes Yes 668 Preventative -FSW106 84 Yes Yes 668 Preventative -FSW108 84 Yes Yes 668 Preventative -FSW122 84 Yes Yes 668 Preventative -FSW97 85 Yes Yes 668 Preventative -FSW99 85 Yes Yes 668 Preventative -FSW103 85 Yes Yes 668 Preventative -FSW105 85 Yes Yes 668 Preventative -FSW124 11281 YesNoPreventative -Retainer Bar10785 I YesYes668Preventative -FSW1814-AA086-M0238, REV. 0Page 199 of 415 Page 199 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 5-3 (cont'd)SG 2E088 Tube Plugging and Stabilization ListU2 NECP 800873488U2 NECP 800873488RSG 2E-088 Tube Plueeine & Stabilizing Map/ListRSG 2E-088 Tube Pluming & Stabilizing Mah/ListStabRow Col Plug Stab ReasonLength115 85 Yes Yes 668 Preventative -FSW121 85 Yes Yes 668 Preventative- FSW123 85 Yes Yes 668 Preventative -FSW133 85 Yes Yes 668 Preventative -FSW98 86 Yes Yes 668 Preventative -FSW100 86 Yes Yes 668 Preventative -FSW102 86 Yes Yes 668 Preventative- FSW104 86 Yes Yes 668 Preventative- FSW106 86 Yes Yes 668 Preventative -FSW108 86 Yes Yes 668 Preventative -FSW112 86 Yes Yes 668 Preventative -FSW114 86 Yes Yes 668 Preventative -FSW116 86 Yes Yes 668 Preventative -FSW122 86 Yes Yes 668 Preventative -FSW124 86 Yes Yes 668 Preventative -FSW126 86 Yes Yes 668 Preventative -FSW101 87 Yes Yes 668 Preventative -FSW103 87 Yes Yes 668 Preventative -FSW105 87 Yes Yes 668 Preventative- FSW111 87 Yes Yes 668 Preventative -FSW113 87 Yes Yes 668 Preventative -FSW115 87 Yes Yes 668 Preventative- FSW121 87 Yes Yes 668 Preventative- FSW123 87 Yes Yes 668 Preventative -FSW125 87 Yes Yes 668 Preventative -FSW88 88 Yes Yes 668 Wear at 6 Continuous AVBs100 88 Yes Yes 668 Preventative -FSW102 88 Yes Yes 668 Preventative -FSW104 88 Yes Yes 668 Preventative -FSW106 88 Yes Yes 668 Preventative -FSW110 88 Yes Yes 668 Preventative -FSW112 88 Yes Yes 668 35%STWD114 88 Yes Yes 668 Preventative -FSW116 88 Yes Yes 668 Preventative -FSW118 88 Yes Yes 668 Preventative -FSW120 88 Yes Yes 668 Preventative -FSW122 88 Yes Yes 668 Preventative- FSW124 88 Yes Yes 668 Preventative -FSW95 89 Yes Yes 668 Preventative -FSW97 89 Yes Yes 668 Wearat 6ContinuousAVBs101 89 Yes Yes 668 Preventative -FSW103 89 Yes Yes 668 Preventative -FSW105 89 Yes Yes 668 Preventative -FSW107 89 Yes Yes 668 Preventative- FSW111 89 Yes Yes 668 Preventative -FSW113 89 Yes Yes 668 Preventative -FSW115 89 Yes Yes 668 Preventative -FSW117 89 Yes Yes 668 Preventative -FSW119 89 Yes Yes 668 Preventative -FSW121 89 Yes Yes 668 Preventative -FSW123 89 Yes Yes 668 Preventative -FSW127 89 Yes Yes 668 Preventative -FSWRow Col Plug Stab Stab Reason94 90 Yes Yes 668 Preventative -FSW100 90 Yes Yes 668 Preventative -FSW102 90 Yes Yes 668 Preventative -FSW104 90 Yes Yes 668 Preventative -FSW106 90 Yes Yes 668 Preventative- FSW108 90 Yes Yes 668 Wear at 6 Continuous AVBs110 90 Yes Yes 668 Preventative -FSW112 90 Yes Yes 668 Preventative -FSW114 90 Yes Yes 668 Preventative -FSW116 90 Yes Yes 668 Preventative -FSW95 91 Yes Yes 668 Preventative -FSW101 91 Yes Yes 668 Preventative -FSW103 91 Yes Yes 668 Preventative -FSW105 91 Yes Yes 668 Preventative -FSW107 91 Yes Yes 668 Preventative -FSW109 91 Yes Yes 668 Preventative -FSW111 91 Yes Yes 668 Preventative -FSW113 91 Yes Yes 668 Preventative -FSW115 91 Yes Yes 668 Preventative -FSW117 91 Yes Yes 668 Preventative -FSW133 91 Yes Yes 668 35%: -TWD98 92 Yes Yes 668 Preventative -FSW100 92 Yes Yes 668 Preventative -FSW102 92 Yes Yes 668 Preventative -FSW104 92 Yes Yes 668 Preventative -FSW106 92 Yes Yes 668 Preventative -FSW108 92 Yes Yes 668 Preventative -FSW110 92 Yes Yes 668 Preventative -FSW112 92 Yes Yes 668 Preventative -FSW114 92 Yes Yes 668 Preventative -FSW116 92 Yes Yes 668 Preventative -FSW118 92 Yes Yes 668 Preventative -FSW120 92 Yes Yes 668 30 < TWD < 35%124 92 Yes Yes 668 Wear at 6 Continuous AVBs136 92 Yes Yes 668 Preventative -FSW99 93 Yes Yes 668 Preventative -FSW101 93 Yes Yes 668 Preventative -FSW103 93 Yes Yes 668 Preventative -FSW107 93 Yes Yes 668 Preventative -FSW111 93 Yes Yes 668 Preventative -FSW117 93 Yes Yes 668 Preventative -FSW129 93 Yes Yes 668 Preventative -FSW94 94 Yes Yes 668 Preventative -FSW128 94 Yes Yes 668 30% < TWD < 35%134 94 Yes Yes 668 Wear at 6 Continuous AVBs130 122 Yes Yes 668 Preventative -Retainer Bar132 122 Yes Yes 668 Preventative -Retainer Bar120 132 Yes Yes 668 Preventative- RetainerBar121 133 Yes Yes 668 Preventative -Retainer Bar109 143 Yes Yes 668 Preventative -Retainer Bar110 144 Yes Yes 668 Preventative- Retainer Bar1814-AA086-M0238, REV. 0Page 200 of 415 Page 200 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 5-4SG 2E089 Tube Plugging and Stabilization ListU2 NECP 800873488 U2 NECP 800873488RSG 2E-089 Tube Plugging & Stabilizing Map/List RSG 2E-089 Tube Plugging & Stabilizing Map/ListStab StabRow Col Plug Stab Reason Row Col Plug Stab ReasonLength Length108 34 Yes No Preventative- Retainer Bar 126 128 Yes No Preventative- Retainer Bar111 35 Yes No Preventative -Retainer Bar 123 129 Yes No Preventative -Retainer Bar110 36 Yes No Preventative -Retainer Bar 125 129 Yes No Preventative -Retainer Bar112 36 Yes No Preventative -Retainer Bar 122 130 Yes No Preventative -Retainer Bar111 37 Yes No Preventative -Retainer Bar 124 130 Yes No Preventative -Retainer Bar113 37 Yes No Preventative -Retainer Bar 121 131 Yes No Preventative -Retainer Bar112 38 Yes No Preventative -Retainer Bar 123 131 Yes No Preventative -Retainer Bar114 38 Yes No Preventative -Retainer Bar 122 132 Yes No Preventative -Retainer Bar113 39 Yes No Preventative -Retainer Bar 118 134 Yes No Preventative -Retainer Bar115 39 Yes No Preventative -Retainer Bar 120 134 Yes No Preventative -Retainer Bar114 40 Yes No Preventative -Retainer Bar 117 135 Yes No Preventative -Retainer Bar116 40 Yes No Preventative -Retainer Bar 119 135 Yes No Preventative -Retainer Bar115 41 Yes No Preventative -Retainer Bar 116 136 Yes No Preventative -Retainer Bar117 41 Yes No Preventative -Retainer Bar 118 136 Yes No Preventative -Retainer Bar116 42 Yes No Preventative -Retainer Bar 115 137 Yes No Preventative -Retainer Bar118 42 Yes No Preventative -Retainer Bar 117 137 Yes No Preventative -Retainer Bar117 43 Yes No Preventative -Retainer Bar 114 138 Yes No Preventative -Retainer Bar119 43 Yes No Preventative -Retainer Bar 116 138 Yes No Preventative -Retainer Bar120 44 Yes No Preventative -Retainer Bar 113 139 Yes No Preventative -Retainer Bar119 45 Yes No Preventative -Retainer Bar 115 139 Yes No Preventative -Retainer Bar122 46 Yes No Preventative -Retainer Bar 112 140 Yes No Preventative -Retainer Bar121 47 Yes No Preventative -Retainer Bar 114 140 Yes No Preventative -Retainer Bar123 47 Yes No Preventative -Retainer Bar 111 141 Yes No Preventative -Retainer Bar122 48 Yes No Preventative -Retainer Bar 113 141 Yes No Preventative -Retainer Bar124 48 Yes No Preventative -Retainer Bar 110 142 Yes No Preventative -Retainer Bar123 49 Yes No Preventative -Retainer Bar 112 142 Yes No Preventative -Retainer Bar125 49 Yes No Preventative -Retainer Bar 111 143 Yes No Preventative -Retainer Bar124 50 Yes No Preventative -Retainer Bar 108 144 Yes No Preventative -Retainer Bar126 50 Yes No Preventative -Retainer Bar 110 34 Yes Yes 668 Preventative -Retainer Bar125 51 Yes No Preventative -Retainer Bar 109 35 Yes Yes 668 Preventative -Retainer Bar127 51 Yes No Preventative -Retainer Bar 118 44 Yes Yes 668 Preventative -Retainer Bar126 52 Yes No Preventative -Retainer Bar 121 45 Yes Yes 668 Preventative -Retainer Bar128 52 Yes No Preventative -Retainer Bar 120 46 Yes Yes 668 Preventative -Retainer Bar127 53 Yes No Preventative -Retainer Bar 130 56 Yes Yes 668 Preventative -Retainer Bar129 53 Yes No Preventative -Retainer Bar 132 56 Yes Yes 668 Preventative -Retainer Bar128 54 Yes No Preventative -Retainer Bar 98 76 Yes Yes 668 Wear at 6 Continuous AVBs130 54 Yes No Preventative -Retainer Bar 103 77 Yes Yes 668 Preventative -FSW129 55 Yes No Preventative -Retainer Bar 109 77 Yes Yes 668 Preventative -FSW131 55 Yes No Preventative -Retainer Bar 111 77 Yes Yes 668 Preventative -FSW131 57 Yes No Preventative -Retainer Bar 100 78 Yes Yes 668 Preventative -FSW131 121 Yes No Preventative -Retainer Bar 102 78 Yes Yes 668 Preventative -FSW129 123 Yes No Preventative -Retainer Bar 104 78 Yes Yes 668 Preventative -FSW131 123 Yes No Preventative -Retainer Bar 108 78 Yes Yes 668 Preventative -FSW128 124 Yes No Preventative -Retainer Bar 110 78 Yes Yes 668 Preventative -FSW130 124 Yes No Preventative -Retainer Bar 112 78 Yes Yes 668 Preventative -FSW127 125 Yes No Preventative- Retainer Bar 87 79 Yes Yes 668 Wearat 6ContinuousAVBs129 125 Yes No Preventative -Retainer Bar 97 79 Yes Yes 668 Preventative -FSW126 126 Yes No Preventative -Retainer Bar 99 79 Yes Yes 668 Preventative -FSW128 126 Yes No Preventative -Retainer Bar 101 79 Yes Yes 668 Preventative -FSW125 127 Yes No Preventative -Retainer Bar 111 79 Yes Yes 668 Preventative -FSW124 128 Yes No Preventative -Retainer Bar 92 80 Yes Yes 668 Preventative -FSW1814-AA086-M0238, REV. 0Page 201 of 415 Page 201 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 5-4 (cont'd)SG 2E089 Tube Plugging and Stabilization ListU2 NECP 800873488 U2 NECP 800873488RSG 2E-089 Tube Plugging & Stabilizing Map/List RSG 2E-089 Tube Plugging & Stabilizing Map/ListStab StabRow Col Plug Stab Reason Row Col Plug Stab ReasonLength Length94 80 Yes Yes 668 Preventative -FSW 109 83 Yes Yes 668 Preventative -FSW96 80 Yes Yes 668 Preventative -FSW 111 83 Yes Yes 668 Preventative -FSW98 80 Yes Yes 668 Preventative -FSW 113 83 Yes Yes 668 Preventative -FSW100 80 Yes Yes 668 Preventative -FSW 115 83 Yes Yes 668 Preventative -FSW102 80 Yes Yes 668 Preventative -FSW 117 83 Yes Yes 668 Preventative -FSW110 80 Yes Yes 668 Preventative -FSW 119 83 Yes Yes 668 Preventative -FSW112 80 Yes Yes 668 Preventative -FSW 121 83 Yes Yes 668 Preventative -FSW114 80 Yes Yes 668 Preventative -FSW 90 84 Yes Yes 668 Preventative -FSW91 81 Yes Yes 668 Preventative -FSW 92 84 Yes Yes 668 Preventative -FSW93 81 Yes Yes 668 Preventative -FSW 94 84 Yes Yes 668 Preventative -FSW95 81 Yes Yes 668 Preventative -FSW 96 84 Yes Yes 668 Preventative -FSW97 81 Yes Yes 668 Preventative -FSW 98 84 Yes Yes 668 Preventative -FSW99 81 Yes Yes 668 Preventative -FSW 100 84 Yes Yes 668 Preventative -FSW101 81 Yes Yes 668 Preventative -FSW 102 84 Yes Yes 668 Preventative -FSW103 81 Yes Yes 668 Preventative -FSW 104 84 Yes Yes 668 Preventative -FSW105 81 Yes Yes 668 Preventative -FSW 106 84 Yes Yes 668 Preventative -FSW107 81 Yes Yes 668 Preventative -FSW 108 84 Yes Yes 668 Preventative -FSW109 81 Yes Yes 668 Preventative -FSW 110 84 Yes Yes 668 Preventative -FSW111 81 Yes Yes 750 FSW 112 84 Yes Yes 668 Preventative -FSW113 81 Yes Yes 750 FSW 114 84 Yes Yes 668 Preventative -FSW115 81 Yes Yes 668 Preventative -FSW 116 84 Yes Yes 668 Preventative -FSW117 81 Yes Yes 668 Preventative -FSW 118 84 Yes Yes 668 Preventative -FSW119 81 Yes Yes 668 Preventative -FSW 120 84 Yes Yes 668 Preventative -FSW121 81 Yes Yes 668 Preventative -FSW 122 84 Yes Yes 668 Wear at 6 ContinuousAVBs90 82 Yes Yes 668 Preventative -FSW 126 84 Yes Yes 668 Preventative -FSW92 82 Yes Yes 668 Preventative -FSW 128 84 Yes Yes 668 Preventative -FSW94 82 Yes Yes 668 Preventative -FSW 132 84 Yes Yes 668 Preventative -FSW96 82 Yes Yes 668 Preventative -FSW 91 85 Yes Yes 668 Preventative -FSW98 82 Yes Yes 668 Preventative -FSW 93 85 Yes Yes 668 Preventative -FSW100 82 Yes Yes 668 Preventative -FSW 95 85 Yes Yes 668 Preventative -FSW102 82 Yes Yes 668 Preventative -FSW 97 85 Yes Yes 668 Preventative -FSW104 82 Yes Yes 668 Preventative -FSW 99 85 Yes Yes 668 Preventative -FSW106 82 Yes Yes 668 Preventative -FSW 101 85 Yes Yes 668 Preventative -FSW108 82 Yes Yes 668 Preventative -FSW 103 85 Yes Yes 668 Preventative -FSW110 82 Yes Yes 668 Preventative -FSW 105 85 Yes Yes 668 Preventative -FSW112 82 Yes Yes 668 Preventative -FSW 107 85 Yes Yes 668 Preventative -FSW114 82 Yes Yes 668 Preventative -FSW 109 85 Yes Yes 668 Preventative -FSW116 82 Yes Yes 668 Preventative -FSW Ill 85 Yes Yes 668 Preventative -FSW118 82 Yes Yes 668 Preventative -FSW 113 85 Yes Yes 668 Preventative -FSW120 82 Yes Yes 668 Preventative -FSW 115 85 Yes Yes 668 Preventative -FSW122 82 Yes Yes 668 Preventative -FSW 117 85 Yes Yes 668 Preventative -FSW89 83 Yes Yes 668 Wear at 6 Continuous AVBs 119 85 Yes Yes 668 Preventative -FSW91 83 Yes Yes 668 Preventative -FSW 121 85 Yes Yes 668 Preventative -FSW93 83 Yes Yes 668 Preventative -FSW 127 85 Yes Yes 668 Preventative -FSW95 83 Yes Yes 668 Preventative -FSW 88 86 Yes Yes 668 Preventative -FSW97 83 Yes Yes 668 Preventative -FSW 92 86 Yes Yes 668 Preventative -FSW99 83 Yes Yes 668 Preventative -FSW 94 86 Yes Yes 668 Preventative -FSW101 83 Yes Yes 668 Preventative -FSW 96 86 Yes Yes 668 Preventative -FSW103 83 Yes Yes 668 Preventative -FSW 98 86 Yes Yes 668 Preventative -FSW.0583 Yes Yes668Preventative -FSW10086 1 Yes I Yes668Preventative -FSW-~-~-4-4 4107 [.8 1Ye I Yes 66Preventative -FSW10286 1 Yes I Yes668Preventative -FSW1814-AA086-M0238, REV. 0Page 202 of 415 Page 202 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 5-4 (cont'd)SG 2E089 Tube Plugging and Stabilization ListU2 NECP 800873488 U2 NECP 800873488RSG 2E-089 Tube Plugging & Stabilizing Map/List RSG 2E-089 Tube Plugging & Stabilizing Map/ListStab StabRow Col Plug Stab Length Reason Row Col Plug Stab Length Reason104 86 Yes Yes 668 Preventative -FSW 121 89 Yes Yes 668 Wear at 6 Continuous AVBs106 86 Yes Yes 668 Preventative -FSW 131 89 Yes Yes 668 Preventative -FSW108 86 Yes Yes 668 Preventative -FSW 100 90 Yes Yes 668 Preventative -FSW110 86 Yes Yes 668 Preventative -FSW 102 90 Yes Yes 668 Preventative -FSW112 86 Yes Yes 668 Preventative -FSW 104 90 Yes Yes 668 Preventative -FSW114 86 Yes Yes 668 Preventative -FSW 106 90 Yes Yes 668 Preventative -FSW116 86 Yes Yes 668 Preventative -FSW 108 90 Yes Yes 668 Preventative -FSW118 86 Yes Yes 668 Preventative -FSW 110 90 Yes Yes 668 Preventative -FSW122 86 Yes Yes 668 Preventative -FSW 112 90 Yes Yes 668 Preventative -FSW130 86 Yes Yes 668 Preventative -FSW 114 90 Yes Yes 668 Preventative -FSW93 87 Yes Yes 668 Preventative -FSW 116 90 Yes Yes 668 Preventative -FSW95 87 Yes Yes 668 Preventative -FSW 118 90 Yes Yes 668 Preventative -FSW97 87 Yes Yes 668 Preventative -FSW 120 90 Yes Yes 668 Wear at 6 Continuous AVBs99 87 Yes Yes 668 Preventative -FSW 130 90 Yes Yes 668 Preventative -FSW101 87 Yes Yes 668 Preventative -FSW 132 90 Yes Yes 668 Preventative -FSW103 87 Yes Yes 668 Preventative -FSW 134 90 Yes Yes 668 Preventative -FSW105 87 Yes Yes 668 Preventative -FSW 99 91 Yes Yes 668 Preventative -FSW107 87 Yes Yes 668 Preventative -FSW 105 91 Yes Yes 668 Preventative -FSW109 87 Yes Yes 668 Preventative -FSW 107 91 Yes Yes 668 Preventative -FSW111 87 Yes Yes 668 Preventative -FSW 109 91 Yes Yes 668 Preventative -FSW113 87 Yes Yes 668 Preventative -FSW 113 91 Yes Yes 668 Preventative -FSW115 87 Yes Yes 668 Preventative -FSW 115 91 Yes Yes 668 Preventative -FSW117 87 Yes Yes 668 Preventative -FSW 117 91 Yes Yes 668 Preventative -FSW119 87 Yes Yes 668 Preventative -FSW 123 91 Yes Yes 668 Preventative -FSW129 87 Yes Yes 668 Preventative -FSW 98 92 Yes Yes 668 Preventative -FSW94 88 Yes Yes 668 Preventative -FSW 104 92 Yes Yes 668 Preventative -FSW96 88 Yes Yes 668 Preventative -FSW 108 92 Yes Yes 668 Preventative -FSW98 88 Yes Yes 668 Preventative -FSW 114 92 Yes Yes 668 Preventative -FSW100 88 Yes Yes 668 Preventative -FSW 116 92 Yes Yes 668 Preventative -FSW102 88 Yes Yes 668 Preventative -FSW 103 93 Yes Yes 668 Preventative -FSW104 88 Yes Yes 668 Preventative -FSW 115 93 Yes Yes 668 Preventative -FSW106 88 Yes Yes 668 Preventative -FSW 102 94 Yes Yes 668 Preventative -FSW108 88 Yes Yes 668 Preventative -FSW 114 94 Yes Yes 668 Preventative -FSW110 88 Yes Yes 668 Preventative -FSW 116 94 Yes Yes 668 Preventative -FSW112 88 Yes Yes 668 Preventative -FSW 103 95 Yes Yes 668 Preventative -FSW114 88 Yes Yes 668 Preventative -FSW 105 95 Yes Yes 668 Preventative -FSW116 88 Yes Yes 668 Preventative -FSW 107 95 Yes Yes 668 Preventative -FSW118 88 Yes Yes 668 Preventative -FSW 109 95 Yes Yes 668 Preventative -FSW138 88 Yes Yes 668 Preventative -FSW 115 95 Yes Yes 668 Preventative -FSW95 89 Yes Yes 668 Preventative -FSW 109 97 Yes Yes 668 Preventative -FSW97 89 Yes Yes 668 Preventative -FSW 110 98 Yes Yes 668 Preventative -FSW99 89 Yes Yes 668 Preventative -FSW 112 98 Yes Yes 668 Preventative -FSW101 89 Yes Yes 668 Preventative- FSW 130 122 Yes Yes 668 Preventative- Retainer Bar103 89 Yes Yes 668 Preventative -FSW 132 122 Yes Yes 668 Preventative -Retainer Bar105 89 Yes Yes 668 Preventative- FSW 127 127 Yes Yes 668 Preventative- Retainer Bar107 89 Yes Yes 668 Preventative -FSW 120 132 Yes Yes 668 35% 5 TWD109 89 Yes Yes 668 Preventative- FSW 119 133 Yes Yes 668 35%_sTWD111 89 Yes Yes 668 Preventative -FSW 121 133 Yes Yes 668 Preventative -Retainer Bar113 89 Yes Yes 668 Preventative- FSW 109 143 Yes Yes 668 Preventative -Retainer Bar115 89 Yes Yes 668 Preventative- FSW 110 144 Yes Yes 668 Preventative- RetainerBar117 89 Yes Yes 668 Preventative- FSW 11814-AA086-M0238, REV. 0Page 203 of 415 Page 203 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Table 5-5Summary of TSP Wear ReviewNumber RelativeLand Edge Length of Shapeof with with Deepest ofSG Row Col Locn Lands wt ih Deet owith Deepest Deepest Wear DeepestWith Wear Wear (to TSP WearWear thickness)2E088 109 79 07H 1 0 Bottom 1/4 Flat2E088 113 81 07H 1 0 Bottom 1/4 Flat2E089 131 57 07H 2 Flank Top 3/4 Tapered2E089 112 82 07C 2 0 Bottom 1/2 Tapered2E089 112 84 07C 1 0 Bottom 1/2 Tapered2E089 90 84 07H 2 0 Bottom 1/2 Tapered2E089 109 85 07H 3 Flank Middle 1/2 Flat2E089 117 87 07H 1 0 Bottom 1/4 Tapered2E089 95 91 07H 2 0 Bottom 1/2 Tapered3E088 112 74 07C 2 0 Bottom 1/2 Tapered3E088 112 74 07H 2 0 Bottom 1/4 Tapered3E088 102 76 07H 3 0 Bottom 3/4 Tapered3E088 100 78 07C 3 0 Bottom 1.0 Tapered3E088 100 78 07H 3 0 Bottom 1.0 Tapered3E088 106 78 07C 3 Flank Bottom 1.0 Tapered3E088 106 78 07H 3 0 Bottom 1.0 Tapered3E088 120 78 07C 2 0 Bottom 1.0 Tapered3E088 120 78 07H 3 0 Bottom 1.0 Tapered3E088 93 85 07C 3 0 Top 1.0 Flat3E088 93 85 07H 3 0 Bottom 1.0 Tapered3E088 109 85 07H 2 0 Bottom 1/2 Tapered3E088 103 89 07C 2 Flank Top 1/2 Tapered3E088 103 89 07H 2 Flank Middle 1/4 Tapered3E088 95 85 07H 1 0 Bottom 1/2 Tapered3E088 93 75 07H 1 0 Bottom 1/4 Tapered1814-AA086-M0238, REV. 0Page 204 of 415 0O0,CO00co)m0).9XPage 204 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Number of AVB Sites with Wear in Unit 3 SVI Tubes(Unit 2 Tubes at Same Locations Used for Comparison)Frequency 3-88 E Frequency 3-89 E Frequency 2-88 ý Frequency 2-89-in- Cumulative % 3-88 -B -Cumulative % 3-89 -e -Cumulative % 2-88 -Cumulative % 2-89504540353001510510.90.80.70.6 620.5 M0.4 '0.30.20.1001 2 3 4 5 6 7 8Bin: Number of AVB Wear Sites9 10 11 12Figure 5-1per Tube for the Freespan Wear Region of Interest: All SGsNumber of AVB Wear Sites Page 205 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013SG2-89 Tube-to-Tube Proximity using January 2012 Data-BaseTubes

• Stayrods

• B01,802 PRX A 803, B04 PRX BO5,806 PRX 0807,808 PRX A B09,B10 PRX c B1l, 812 PRX 0 20%TW or greater

• AVB Dent01501401301201101009080706050403020100-i0 10 20 30 40 50 6070 80 90 100 110 120 130 140 150 160 170 180ColumnFigure 5-2SG 2E089 Tube-to-Tube Proximity Map Based on 2012 Eddy Current Data Re-analysis Page 206 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013000 SGZ..89 Tube-to-Tube Proximity >1V using January 2C12 Data*BaseTAbes 014ot Leg #ColdLeg *Stayrods o20%TWo,-Greater0 15090 140M ~ 130 -- ----... .... .....C)oo 120 R -::: :: ::.... .. .....00 .B100 .. .. ... .. ... .. ..100............... ...... ... ...70.;o..-. -. ... ....... .. ..............:.. ........=..90 .B....................................... ... .. ... ...S- --°° --.. ... ... ...- --.. ....-... .-. .-° ,. .- .-. .-.-.- ..- ....-. .-, ° .° .. .. ...- ... .... ... .... ... ...I .. .. ... ... ... ... ...... .. .... ..... ... ... ... .o.. ... , ......... ... ... ........,.. ... ........ ....... ....,. ... ,. .o ..... .............,. ... ... ........ .Q. .* , , .o o = o o .o ..., ....., .., , o , o o o ..................o ., ,Of720 .oo ... ,o .oo...... ... ... .,.. .. ... ...... .% .o ... ooO ...o .oo ..l .... o .% .,o. .% .C0 ..... .... .. ... ...... ... ... ... .. .... .. ... .. .. ... ... ... ... ... .. .. ..... .. ...... ... ..o. % .. .* .° .. -.-.. -.... ... .oO... .., .ooo ...o.o .o -.. ... % ...o...% .... ..,.%...%.... -. -. -%.. .. -. .. %--- % ooo % %-4,Figue50-6004....................................................*.......*...*............................... ..........*.*..*..*..*..*..*.*..*.*..*.*.*........ .... ..................... .. .. ... .. ..CA X0 ... .... ..20 3 0 5 0 7 0 3 lC 10 10 10 4 5 6 7 8... .. .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ..C o.. ..um r. ..40 ~ ~ ~ ~ ~ ~ Fgr 5-3...............SG ~ .......... .....Tubeto-Tue.Prximit.MapBase.on.212.Edy.CurentData.e-anlysi;.... olt. roxim...Rport Co00200ODXMcc00,-hrnPage 207 of 414LTR-SGDA-1 2-36, Rev. 3 NP-AttachmentFebruary 15, 2013SG2-88 Tube-to-Tube Proximity using January 2012 Data-Base Tubes 0 Hot Leg PRX A Cold Leg PRX 0 20%TW and Greater* AV8 Dent1501401301201101009080070A A::::~:: .......:::.. ............... AA..... ............................::::.:.::.:.::: .:::: .::: .::-::-..... .. ....--:.-.:.-.:.--..:D _.............................. ..... .. -..... ...... ... .. ... .. .. ..... .... .. .. .................................... .......................... -.. .... ... ....... ..... ...................... ...... .. ........ ......................... -................................... ... ... ..... .. ............. ....... .................. ........................... ......... ............... ........ .... ... ... ......... ........ ........... ..... .. .. ....... ..............................................................................., , , * .........................................................................................................* * * * * * .............................................................................* ........................................................................................................................................................................................................................................................................* * * * * * , .............................................................................................................................................................................................................................................................................................................................* * , * , * ...........................................................................................* * * , * ................................................................................................................................................* , * , " .......................................................................................60. ..................... *.... o.. .............. ,....................... .......................S. ...... .- ..-. -.. -. ..... .. .........-. .......- .- ....-. .-.-.-.-.- .......... .- .......-.- .* *

• o... ... o.. ..* * ..o........ ... .... .. ..... .. ..........* * ........ .......... .. ....... ........ ........ ..4O. .......* .... ....*. ......... ..................*,- -. ...-.-.* ..- -.- -. , .* -..° -....,*- .° * --. ..* o .,- ...°- -° o- % --° .- -.. , .° ° .., .. .,-.°,* .-*,..* .,o.. , * -,- .°.- o-. .- -,- -°50 .- ...-... .....--... ... X. ,,.,. .- , ... .-. , .. .,..*.---...° ,.*-o..X- .- .,.X,.o * ......,.*.. * ..,-........... .. * .... .. ..... .. ..... ... .......... .. ......... ........ .. ...... .. ....... .... ..... .. ...... I ........... .. ... .. .. ..... .. ......... ... ........ ....... .. .......... .................................................................................................. ......... * ............ ... .... .. .. ... ......... ...... ... ..... .. .. ........ .. .................................................................................................. .. ....... * * ........... I ...... ..... .. ... ....... .......... .. ... .. .. .......... ...............................................................................................20100.......................................................................................................................................................................................................................................................................................................................................................................................................0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180ColumnFigure 5-4SG 2E088 Tube-to-Tube Proximity Map Based on 2012 Eddy Current Data Re-analysis co00000Page 208 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 5-5Field Proximity Signal Using +Pt Page 209 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15. 2013Figure 5-6+Pt Multi-Frequency Response for Suspected Freespan Wear on SG 2E089 Rl13 C81

-.x,Oo Page 210 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20130,0)0)CA)mIFigure 5-7+Pt Terrain Plot for Suspected Freespan Wear on SG 2E089 RI 11 C81 Page 211 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013i -4Figure 5-8Multi-Frequency +Pt Response for AVB Wear Extension on SG 3E088 R107 C75

-.O000,.90m0Page 212 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 5-9+Pt Full Scan Line Lissajous Plot and Terrain Plot for SG 3E088 R107 C75 0,0)000)90Page 213 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 5-10+Pt Terrain Plot for SG 3E088 R107 C75 0)L00CA)0,m90;UmC)Page 214 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 5-11Non-Typical +Pt Response on R107 C75 SG 3E088 Page 215 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 5-12+Pt Multi-Frequency Plot for Laboratory Simulation of Freespan Wear (12%TW)

Page 216 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 5-13+Pt Terrain Plot for Laboratory Simulation of Freespan Wear (12%TW)

Page 217 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 5-14Pancake Coil Response for Laboratory Simulation of Freespan Wear (12%TW)

Page 218 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013a,b,cFigure 5-15Pancake Coil Multi-Frequency Response for Laboratory Simulation of Freespan Wear (12%TW)

LPage 219 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 20130) JSUMEN !N1W VIE UO,,,LY5I5 0U6=09 JtsKjAilk PILtCS III t I no PM IMMOD Jam, I lII IItMI 1j" F tI: IFigure 5-16Bobbin Coil 300 and 150 kHz Absolute (Ch4 and Ch6) Response for Laboratory Simulation of Freespan Wear

-3000);0mO0Page 220 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 5-17Bobbin Coil Response for SG 2E089 RI II C81 Page 221 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013SG 3E088 Reviewed Tube LocationsTubes a +Pt Reviewed Tube 0 Freespan Wear Tube145135S "000115 .-" ._ ", ". ". " .o@oQ "..0 0 0*~ 0* ...* -, ..65 70 75 80 85 90 95 100ColumnFigure 5-18Plot of SG 3E088 Locations for which +Pt Data Review was Conducted Page 222 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013WVI30%TW/0/58a3Li91011\12260000 00 0 0n0100 00 00o~og0 000 06 00 0~ogO0000 00 009 0 00000G060 00 Q000U3 SG-88 Row: 98 Column: 78Figure 5-19Sample of Tube Motion Plot Page 223 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 5-20+Pt Terrain Plot of R93 C85 TSP 07H Bottom

-.1 Page 224 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013C)m0o'r W I 1A 1 ; ' 1-1 ,14Figure 5-21+Pt Terrain Plot of R93 C85 TSP 07H Top

-A0C)o0m0Page 225 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013Figure 5-22+Pt Terrain Plot of R93 C85 TSP 07H Vertical Offset between Wear Edge and TSP Edge 0,004%0m0Page 226 of 414LTR-SGDA-12-36, Rev. 3 NP-AttachmentFebruary 15, 2013SVI 20%TWSVI 46%TW678549310.T,,I- D w 0 A.- I,&21II,0001112Ic4WMU3 SG-88 Row: 93 Column: 85Figure 5-23Motion Plot of R93 C85