ML17166A497

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Teleconference, Meeting Material for Steam Generator Tube Inspection Tube Inspection Discussion During Palisades 2017(1R25) Outage (Preliminary Information)
ML17166A497
Person / Time
Site: Palisades Entergy icon.png
Issue date: 05/04/2017
From:
Entergy Nuclear Operations
To: Jennivine Rankin
Plant Licensing Branch III
Rankin J, NRR/DORL/LPL3, 415-1530
Shared Package
ML17160A181 List:
References
CAC MF9396
Download: ML17166A497 (22)
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STEAM GENERATOR TUBE INSPECTION DISCUSSION DURING PALISADES 2017 (1R25) OUTAGE (Preliminary Information)

Currently Palisades is ~ 93% through the base scope eddy current inspection and starting the special interest inspection scope as of 5/5/2017 at ~ 0430 hours0.00498 days <br />0.119 hours <br />7.109788e-4 weeks <br />1.63615e-4 months <br />

1. Discuss any trends in the amount of primary-to-secondary leakage observed during the recently completed cycle.

Refer to attached Primary to Secondary Leak Rate for Operational Cycle 25 Primary to Secondary Leak Rate graph. Leakage has been minimal all cycle.

2. Discuss whether any secondary side pressure tests were performed during the outage and the associated results.

No secondary side pressure tests are planned for the 2017 refueling outage (1R25).

3. Discuss any exceptions taken to the industry guidelines.

In cycle 22, Palisades submitted a deviation to the NRC: Technical Justification Supporting Deviation from the EPRI Appendix I ETSS for ODSCC Sizing Palisades will deviate from the needed requirement to use an approved Examination Technique Specification Sheet (ETSS) contained in The EPRI PWR Steam Generator Examination Guidelines - Revision 7, Section 6.2 for ODSCC sizing. Palisades will instead use a modified ETSS for ODSCC. The modified ETSS will be identical to the ETSS approved per Appendix I of the examination guidelines with the exception that only the sub-set of data from CE plants will be used instead of the combined fleet data set used in the approved ETSS.

A comprehensive review of axial ODSCC in Palisades steam generators shows that Appendix I28432 over sizes maximum depth values for axial ODSCC at Palisades.

There is a reasonable basis to submit a deviation request for maximum depth sizing of axial ODSCC indications at Palisades. The request is relatively modest since it uses the Combustion Engineering (CE) subset of the well vetted data of Appendix I28432. The regression slope and standard error of regression are retained. Only the intercept parameter is changed. This provides an across the board reduction of NDE maximum depth sizing of 11.23 %TW. This will lead to about a 1000 psi increase in calculated condition monitoring burst pressures and much better matching of projected and measured NDE maximum depths.

The deviation was implemented in the 2012 (1R22) refueling outage steam generator inspection for the remaining life of the existing Palisade steam generators.

4. For each steam generator, provide a description of the inspections performed including the areas examined and the probes used (e.g., dents/dings, sleeves, expansion-transition, U-bends with a rotating probe), the scope of the inspection (e.g., 100% of dents/dings greater than 5 volts and a 20% sample between 2 and 5 volts), and the expansion criteria.

1

Full length ECT bobbin coil examination of all in-service tubes (except row 1, 2, and 3 U-bends) in both SGs.

ECT +Point' coil examinations (both SGs):

  • 100% of rows 1, 2, and 3 U-bends.
  • 100 examination of in-service freespan ding (DNG) indications >5V between tubesheet hot (TSH) and tubesheet cold (TSC)
  • 100% of hot leg from TTS + 3.5-4 (depending on sludge height) to a minimum of 13.5 below the bottom of the expansion transition.
  • 100% of free span dings >5V between TSH and TSC.
  • 100% of >2V dents at egg crate, diagonal bar, and vertical strap intersections between TSH and TSC.
  • 25% of historical %TW calls at diagonal bars and vertical straps, selected from indications not inspected in 1R24
  • 100% of historical TRA(trackable anomaly) indications
  • The outer 3 peripheral tubes at the cold leg from TTS+4 to TTS-2 for detection of possible loose parts or wear signals.
  • The periphery region is defined to be the outer three (3) tubes exposed to the annulus, all tubes in rows 1 through 4, and the inner three (3) tubes around the stay cylinder region.
  • One tube around all tubes with foreign object signals as well as the affected tubes.
  • 100% of bobbin I-Code indications. I-Code indications include: Absolute Drift Indication (ADI), Dent or Ding with Indication (DDI), Differential Freespan Indication (DFI), Distorted Support Plate Indication (DSI), Distorted Tubesheet Indication (DTI), Loose Part Indication (LPI) and Non-Quantifiable Indication (NQI).

The expansion criteria for each degradation is attached to the back in tables 9-1 through 9-4.

5. For each area examined (e.g., tube supports, dent/dings, sleeves, etc), provide a summary of the number of indications identified to-date of each degradation mode (e.g., number of circumferential primary water stress corrosion cracking indications at the expansion transition). For the most significant indications in each area, provide an estimate of the severity of the indication (e.g., provide the voltage, depth, and length of the indication). In particular, address whether tube integrity (structural and accident induced leakage integrity) was maintained during the previous operating cycle. In addition, discuss whether any location exhibited a degradation mode that had not previously been observed at this location at this unit (e.g., observed circumferential primary water stress corrosion cracking at the expansion transition for the first time at this unit).

As of 5/4/2017 @ 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br /> Number Number Integrity SG Location Type Indications Tubes Acceptable A TSH Axial ODSCC 12 10 YES 2

A TSH Axial PWSCC 1 1 YES A TSH Circ PWSCC 0 0 N/A A TSH Circ ODSCC 3 3 YES A TSH Volumetric 0 0 N/A A TEC to TEH Wear > 40 1 1 YES B TSH Axial ODSCC 3 2 YES B TSH Axial PWSCC 0 0 N/A B TSH Circ PWSCC 0 0 N/A B TSH Circ ODSCC 0 0 N/A B TSH Volumetric 0 0 N/A B TEH to TEC Wear > 40 0 0 N/A A Tube Supports Axial ODSCC 0* 0* N/A A Freespan Axial ODSCC 0* 0* N/A B Tube Supports Axial ODSCC 0* 0* N/A B Freespan Axial ODSCC 9* 1* N/A Total 29 18

  • Some support/freespan indications have been identified but are not completely through the data resolution process as of this snapshot. Updated quantities may be presented verbally during the phone call.

SG A

  • Axial PWSCC within tubesheet. Indication parameters:

o Max voltage: 1.67 V o Length: 0.45 o Max depth: 100 %TW o SIPC and AILPC criteria satisfied 3

  • Circ ODSCC at TSH. Max indication parameters (not the same indication):

o Voltage: 0.97 V o Circumferential extent: 0.47 (72 degrees) o Depth: 79 %TW o PDA: 9.7 o SIPC and AILPC criteria satisfied

  • Tube support wear:

o Max depth: 46 %TW o SIPC and AILPC criteria satisfied

  • No foreign object wear flaws 4

SG B

  • Axial ODSCC in the Free Span o Max Voltage: 1.18 o Length: 0.65 o Max depth 70.5%

o Exceeded Screening for Burst

  • No foreign object wear flaws Both SGs - Support Structure Wear
  • Average growth rate is essentially zero
  • 95/50 growth rate is <3 %TW/EFPY Freespan There is one indication in SGB (Tube 62-101) that has an indication between the 04hot and 03hot support plates. It has a total length of ~ 12 inches with 9 indications. The second indication is the largest and exceeded the screening criteria for burst. It has been scheduled for in-situ testing. The details of the flaw are identified above for SGB.

U-Bends There are no U-bend repairable indications reported to date.

6. Describe repair/plugging plans.

5

Currently there are 15 potential tubes requiring tube plugging in SG E-50A and 3 potential tubes in SG E-50B.

All stress corrosion cracking (SCC) indications will be plugged. Any circumferential SCC indications near the top-of-tubesheet (TTS) will be stabilized and plugged. C* depth is applicable to the HL and CL All wear indications (at support structures) greater than or equal to 40%TW will be plugged.

7. Describe in-situ pressure test and tube pull plans and results (as applicable and if available).

Based on the available data to date, there is one tube that will be tested in SGB.

8. Discuss the following regarding loose parts:

What inspections are performed to detect loose parts?

The hot leg top of tube sheet (TTS) region is inspected with +Pt up to a nominal 4 inches, but not less than 3.5 inches and not less than the height of the sludge pile, above TTS. A similar inspection is performed for the cold leg TTS region 3 tubes deep along periphery and tube lane and 3 inches above the TTS. Foreign object search and retrieval (FOSAR) will be performed for the periphery, tube lane annulus, and stay cavity areas.

A description of any loose parts detected and their location within the SG As of 5/4/2017 at 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br />, the following are the number of potential loose parts identified with the plus point inspection:

E-50A 164 PLP Calls in 136 Tube Locations E-50B 105 PLP Calls in 90 Tube Locations The vast majority of the indications are historical. None have resulted in tube degradation.

If the loose parts were removed from the SG Anticipate FOSAR start on 5/6/2015.

Indications of tube damage associated with the loose parts 6

To date, ECT has not identified any wear associated with loose parts. Visual inspection may yet identify foreign object wear.

9. Discuss the scope and results of any secondary side inspection and maintenance activities (e.g., in-bundle visual inspections, feedring inspections, sludge lancing, assessment deposit loading, etc).

Sludge lancing was not performed.

10. Discuss any unexpected or unusual results.

Currently there are no unexpected or unusual results. There are no tubes that have failed the screening criteria requiring in-situ pressure testing

11. Provide the schedule for steam generator-related activities during the remainder of the current outage.

The base - scope bobbin and top of tube sheet inspections are nearly complete.

Special interest examinations are ongoing. U-bend examinations are pending.

Nominal SG schedule is as follows:

In-situ testing 5/6/17 Scheduled complete ECT 5/8/17 Scheduled complete repair 5/9/17 Scheduled SG closeout 5/10/17 Nozzle dam removal and manway installation complete 5/12/2017 7

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 The following is the primary to secondary leak trend for the last fuel cycle Note: Units in gallons per day

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Table 8-1: Eddy Current technique Table Degradation Probe EPRI Extended Demonstrated Applicability Detection? Sizing? POD Sizing Parameters Mechanism Type ETSS Applicability BOBBIN Depth = 0.94*NDE + 1.24 Sy,x Tube to Tube 13091.1 Bobbin Freespan tube-to-tube wear None Yes CMOA = 1.57 Wear Rev. 0 N = 40 R= 1.0 Freespan (excluding u-bend), POD: Log-Logistic I28413 Axial ODSCC Bobbin eggcrate, sludge pile, & broached None Yes No Slope = 4.296 Rev. 3 TSPs with or without dents 2Vpp Intercept = -5.679 24013.1 Axial ODSCC Bobbin Freespan including dings 5V None Yes No Rev. 2 Depth = 0.79*NDE + 12.85 Sy,x Foreign 27091.2 Foreign object wear Extended for I-Bobbin Yes CMOA = 13.49 Object Wear Rev. 1 (part not present); I-690 tubing 600 tubing N = 271 R= 0.8 Depth = 0.98*NDE + 2.89 Sy,x 96004.1 AVBs, TSPs, Support Wear Bobbin Dents <5V Yes CMOA = 4.19 Rev. 13 vertical and diagonal straps N = 76, R = 0.98 Depth = 0.27*NDE + 28.42 Sy,x 96005.2 Freespan in the presence of Pitting Bobbin Sludge Pile Yes CMOA = 13.36 Rev. 9 copper N = 62, R = 0.41 Axial ODSCC Depth = 0.9994*NDE + 0.4998 Sy,x = 11.856 I28424 N = 589, R = 0.88 Rev. 3 Depth: CMOA (detect); POD: Log-Logistic BED = 0.9941*NDE + 2.7324 TSP (with or without dents Axial ODSCC +Point' None Yes BED: CMOA Slope = 11.4155 Sy,x = 10.685

<=2vpp) and sludge pile I28431 Intercept = -17.7154 N = 589, R = 0.895 Rev. 2 BEL: CMOA (sizing) BEL = 0.6451*NDE + 0.0785 Sy,x = 0.106 N = 589, R = 0.723

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Degradation Probe EPRI Extended Demonstrated Applicability Detection? Sizing? POD Sizing Parameters Mechanism Type ETSS Applicability Depth = 1.0069*NDE + 0.3736 Sy,x = 12.329 I28425 N = 676, R = 0.862 Rev. 3 Depth: CMOA (detect) Freespan (excluding u-bend), POD: Log-Logistic BED = 0.972*NDE + 3.698 Axial ODSCC +Point' eggcrate, & broached TSPs with or None Yes BED: CMOA Slope = 6.7176 Sy,x = 12.153 I28432 without dents 2Vpp Intercept = -9.146 N = 676, R = 0.859 Rev.2 BEL: CMOA (sizing) BEL = 0.516*NDE + 0.208 Sy,x = 0.2 N = 676, R = 0.592 Depth =1.16*NDE -10.4 10411.1 Higher Row U-Axial ODSCC +Point' Low Row U-bends Yes CMOA Sy,x = 19.02 N=17, Rev. 0 bends R=0.69 PDA = 0.3*NDE +26.49 Sy,x =

18.14 PDA: Information N = 9 R = 0.36 21409.1 Support structures, freespan, Axial ODSCC +Point' U-bends Yes Rev. 7 sludge pile, & tubesheet crevice Length: Information Length = 1.14*NDE +0.03 Sy,x

= 0.21 N = 9 R = 0.94 Depth = 0.13*NDE + 74.55 Sy,x

= 14.44 Freespan dings &

Depth: Information N = 22, R = 0.13 22401.1 dented eggcrates, Axial ODSCC +Point' Dented TSPs Yes Rev. 4 diagonal bars and Length: CMOA Length = 0.74*NDE + 0.27 Sy,x vertical straps

= 0.27 N = 22, R = 0.62 Axial PWSCC Depth = 0.68*NDE + 14.45 Sy,x

= 12.44 N = 33, R= 0.64 Depth: CMOA PDA = 0.21*NDE + 28.77 Sy,x 20511.1 Axial PWSCC +Point' Expansion Transitions Tubesheet Yes PDA: Information = 7.95 Rev. 8 N = 32, R= 0.33 Length: CMOA Length =1.10*NDE - 0.01 Sy,x

= 0.13 N = 32, R= 0.87

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Degradation Probe EPRI Extended Demonstrated Applicability Detection? Sizing? POD Sizing Parameters Mechanism Type ETSS Applicability Depth = 0.90*NDE + 7.56 Sy,x

= 15.28 Depth: CMOA N = 46, R= 0.81 96703.1 Tubesheet, Axial PWSCC +Point' Dents/Dings Yes Rev. 17 Dented supports Length: CMOA Length =1.00*NDE + 0.13 Sy,x

= 0.28 N = 46, R= 0.91 Depth = 0.56*NDE + 19.06 Sy,x 96511.2 Higher Row U-Axial PWSCC +Point' Low Row U-bends Yes CMOA = 14.97 Rev. 16 bends N = 24, R= 0.66 Depth = 0.95*NDE - 5.61 Sy,x

+Point' 99997.2 Higher Row U-Axial PWSCC Low Row U-bends Yes CMOA = 10.50 High Freq Rev. 10 bends N = 24, R= 0.85 Circ ODSCC Depth = 0.13*NDE +60.10 Sy,x

= 24.50 N = 40, R= 0.14 Depth: Information 21410.1 U-bends, PDA = 1.02*NDE +21.84 Sy,x Circ ODSCC +Point' Rev. 6 Expansion Transitions freespan dings, Yes PDA: CMOA = 23.58 Note 4 dented supports N = 38 R = 0.47 Length: Not usable Length = 1.24*NDE +0.42 Sy,x

= 0.69 N = 38 R = 0.69 Length = 0.52*NDE + 0.03 Sy,x 22842.1 Freespan dings, Circ ODSCC +Point' Dented Supports Yes CMOA (Note 3) = 0.26 Rev. 4 u-bends N = 18, R= 0.75 Circ PWSCC U-bends, POD: Log-Logistic I11524 Circ PWSCC +Point' Expansion Transitions Dents/Dings, Yes No Slope = -20.522 Rev. 0 Tubesheet Intercept = 13.733

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Degradation Probe EPRI Extended Demonstrated Applicability Detection? Sizing? POD Sizing Parameters Mechanism Type ETSS Applicability Depth = 0.73*NDE + 8.16 Sy,x

19.27 N = 37, R= 0.53 PDA = 0.82*NDE + 2.83 Sy,x

20510.1 No (see Circ PWSCC +Point' Expansion Transitions U-bends CMOA 6.98 Rev. 7 I11524)

N = 37, R= 0.88 Length = 1.01*NDE + 0.16 Sy,x

= 0.26 N = 37, R= 0.89 96511.2 Circ PWSCC +Point' See Axial PWSCC section of this table Rev. 16 Depth = 0.84*NDE + 10.32 Sy,x

9.56 N = 16, R= 0.92 PDA = 1.01*NDE + 8.55 Sy,x

96701.1 Dents/Dings and No (see Circ PWSCC +Point' Expansion Transitions CMOA 7.53 Rev. 12 tubesheet I11524)

N = 16, R= 0.90 Length = 0.91*NDE + 0.22 Sy,x

= 0.15 N = 16, R= 0.97

+Point' 99997.2 Circ PWSCC See Axial PWSCC section of this table High Freq Rev. 10 Wear Depth = 1.04*NDE -0.91 Sy,x Tube to Tube 13901.1

+Point' Freespan tube-to-tube wear U-bends Yes CMOA = 1.50 Wear Rev. 1 N = 40 R= 1.0 Dented/non-dented Supports, Depth = 1.06*NDE + 0.13 Sy,x 10908.4 Wear +Point' AVBs Foreign object Yes CMOA = 3.78 Rev. 1 wear (part N = 49, R = 0.99 present)

Foreign +Point' 27901 Volumetric Foreign object wear (part not See latest revision of specific Object Wear or .115 through Freespan Wear Yes CMOA present) ETSS [10.b]

(Note 1) Pancake 27907 (part not present)

Pitting Depth = 1.02*NDE + 5.81 Sy,x 21998.1 Pitting +Point' Volumetric in freespan Sludge Pile Yes CMOA = 6.28 Rev. 4 N = 63, R= 0.94

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Degradation Probe EPRI Extended Demonstrated Applicability Detection? Sizing? POD Sizing Parameters Mechanism Type ETSS Applicability Specialty Probes PDA = 0.38*NDE +35.92 Sy,x

= 14.92 Both: CMOA N = 26 R = 0.42 Ghent 20407.1 Axial ODSCC Support structures & freespan None Yes (Note 2) Rev. 7 (PDA and Length Length = 0.33*NDE +0.36 Sy,x Only)

= 0.13 N = 26 R = 0.48 CMOA Length = 2.08*NDE -0.29 Sy,x Ghent 20508.1 Axial PWSCC Expansion Transitions None Yes = 0.15 (Note 2) Rev. 6 (Length Only) N = 32 R = 0.8 Ghent 20509.1 Axial PWSCC Dented support structures None Yes Not qualified (Note 2) Rev. 5 Depth = 0.55*NDE +35.18 Sy,x

= 24.02 N = 22 R = 0.52 Depth: CMOA Length = 1.81*NDE -0.07 Sy,x Ghent 20406.1 Top of tubesheet & expansion = 0.54 Circ ODSCC None Yes PDA: CMOA (Note 2) Rev. 7 transitions N = 22 R = 0.78 Length: CMOA PDA = 1.34*NDE +13.72 Sy,x

23.98 N = 22 R = 0.58 Depth = 0.9*NDE +1.91 Sy,x

13.43 N = 21 R = 0.79 Length = 0.8*NDE +0.34 Sy,x Ghent 20507.1 Circ PWSCC Expansion Transitions None Yes CMOA = 0.27 (Note 2) Rev. 6 N = 21 R = 0.79 PDA = 0.99*NDE +4.64 Sy,x =

6.37 N = 21 R = 0.87 Multiple ETSSs are available for depth sizing of foreign object wear, each depending on the shape of the wear scar and the coil being used. If foreign object wear (with no part present) is reported, an appropriate +Point' or pancake coil technique will be selected for performing CMOA.

The associated NDE uncertainties and CMOA limits will be documented in the CMOA report.

The Ghent probe will only be used if needed for clarification of the eddy current response or for additional sizing information associated with unusual or unexpected indications.

In lieu of the stated ETSS slope, a slope value of 1.0 will be conservatively assumed for integrity assessment.

The sizing performance of ETSS H-21410.1 with respect to circumferential depth profiling of ODSCC is described by EPRI TR-107197-P1, which utilized the same sizing methodology as ETSS H-21410.1. The performance parameters are as follows: Depth = 1.0*NDE, Sy,x = 13.8; PDA =

1.05*NDE - 0.011, Sy,x = 13.43

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Table 9-1: Inspection Scope Summary - Wear Damage E/P Location Probe / ETSS Scope Expansion / Comments Mech. D/S Bobbin / +Point all new wear, all wear 40%TW, all bobbin Wear Eggcrates E/D/S 100% bobbin except row 1-3 u-bends.

96004.1 I-codes DB/VS

+Point 10908.4 E/D/S 100% +Point row 1-3 u-bends.

+Point all eggcrate wear, and 25% of DB/VS wear not If SCC is coincident with significant DB/VS wear, then P(SCC)/ +Point /

previously inspected, in order to detect any SCC coincident +Point all DB/VS wear in the affected SG. In-situ testing D (see SCC sections) with wear. will be required per CDME-07-119 Bobbin / 100% bobbin except row 1-3 u-bends. Identifies coincident +Point all bobbin I-codes and all bobbin indications Dented VS/DB ( E/D 96004.1 wear and denting (see [3.e]) of coincident wear and denting 5Vpp)

+Point 10908.4 100% +Point row 1-3 u-bends, plus all bobbin indications of E/D/S coincident wear and denting. (see CDME-07-119)

Apply this technique to all VS/DB dents >5Vpp reported by Dented VS/DB (> +Point 10908.4 If wear cannot be sized (depth or voltage), then in-situ E/D/S bobbin probe to ensure detection and sizing 5Vpp) testing will be required of wear (see CDME-07-119)

Bobbin /

Tube to Tube E/D/S 100% bobbin except row 1-3 u-bends. +Point all new wear, +Point all bobbin I-Codes 13091.1 Contact Wear

+Point row 1-3 u-bends.

+Point 13901.1 E/D/S +Point highest eggcrate through the square bend for the tubes surrounding R99 C140 in SGB Bobbin / +Point all bounding tubes with loose part wear or loose Loose Part Wear E/D 100% bobbin and FOSAR both SGs.

27091.2 part indication or visually detected loose part

+Point 27901-27901 thru 27907 when loose part not present (CMOA)

E/D/S 27907 10908.4 when loose part present (CM) 10908.4

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Table 9-2: Inspection Scope Summary - Axial ODSCC/PWSCC Damage E/P Location Probe / ETSS Scope Expansion / Comments Mech. D/S Bobbin /

Axial E/D 100% bobbin except row 1-3 u-bends. +Point all bobbin I-Codes Non-dented and I28413 ODSCC 2Vpp Dented Eggcrates DB/VS E/D +Point /

+Point inspection of all bobbin I-Codes for ODSCC detection I28425 Freespan

+Point /

E/S +Point depth and length sizing of detected ODSCC I28432

+Point Row 1-

+Point /

3 U-bends P/D/S 100% +Point row 1-3 u-bends. +Point sizing of any low row indications.

10411.1 Bobbin /

Freespan Ding E/D 100% bobbin except row 1-3 u-bends. +Point all bobbin I-Codes 24013.1 5Vpp

+Point / +Point inspection of bobbin I-Codes at dinged freespan locations for E/D/S 22401.1 ODSCC detection, and length sizing of detected ODSCC.

Freespan Ding

>5Vpp E/D/S +Point / +Point inspection to detect and length size axial ODSCC at 22401.1 dinged and dented locations.

Dented >2Vpp Eggcrates DB/VS

+Point / +Point 100% H/L TTS +3 to 13.5 below the bottom of the expansion +Point 100% of region in affected SG; ensure 20%

Sludge Pile and E/D I28424 transition; +Point inspection of cold leg bobbin I-Codes inspected in the other SG Exp Transition

+Point / +Point inspection for depth and length sizing of detected Axial E/S I28431 ODSCC indications at the sludge pile and expansion transitions.

+Point / (MR)

Axial E/D/S 100% +Point Row 1-3 u-bends Row 1-3 U- 96511.2 If SCC is detected in row 3, then inspect all u-bends in row 4 PWSCC bends of the affected SG, and 20% of row 4 in the unaffected SG.

+Point / (HF)

E/D/S 99997.2 Dented Eggcrates P/D/S +Point / +Point all >2Vpp dents at structures and dings >5Vpp in If an indication is detected, then a scope expansion will be DB/VS 96703.1 freespan; +Point inspection of bobbin I-Codes determined based on the dent voltage and significance of the indication.

Dinged Freespan Tubesheet and +Point 100% H/L TTS +3 to 13.5 below the bottom of the

+Point / +Point 100% of region in affected SG; ensure 20%

Exp Transition E/D/S expansion transition; +Point 20511.1 inspected in the other SG inspection of cold leg bobbin I-Codes

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Table 9-3: Inspection Scope Summary - Circumferential ODSCC/PWSCC Damage E/P Location Probe / ETSS Scope Expansion / Comments Mech. D/S Row 1-3 U- +Point / 22842.1 & If SCC is detected in row 3, then inspect all u-bends in row 4 Circ ODSCC P/D/S 100% +Point row 1-3 u-bends bends 21410.1 of the affected SG, and 20% of row 4 in the unaffected SG Dented Eggcrates P/D/S +Point / 22842.1 &

+Point all >2Vpp dents at structures and dings >5Vpp If an indication is detected, then a scope expansion will be DB/VS 21410.1 in freespan; +Point inspection of bobbin I-Codes; determined based on the dent voltage and significance of the circumferential indication Dinged Freespan TTS and +Point 100% H/L TTS +3 to 13.5 below the bottom of the

+Point /

Expansion E/D/S expansion transition; +Point inspection of cold 21410.1 +Point 100% of region in affected SG; ensure 20%

Transition leg bobbin I-Codes inspected in the other SG Expansion +Point / EPRI TR-E/S Sizing of circumferential indications per EPRI TR-107197-P1 Transition 107197-P1

+Point (MR) /

Circ P/D 100% +Point row 1-3 u-bends Row 1-3 U- 96511.2 If SCC is detected in row 3, then inspect all u-bends in row 4 PWSCC bends of the affected SG, and 20% of row 4 in the unaffected SG

+Point (HF) /

P/D 99997.2 Dented +Point / +Point all >2Vpp dents at structures and dings >5Vpp in P/D If an indication is detected, then a scope expansion will be Eggcrates I11524 freespan; +Point inspection of bobbin I-Codes determined based on the dent voltage and significance of DB/VS. Dinged +Point /

P/S Sizing of circumferential PWSCC the circumferential indication Freespan 96701.1

+Point /

P/D 100% +Point row 1-3 u-bends Row 1-3 U- I11524 If SCC is detected in row 3, then inspect all u-bends in row 4 bends +Point / of the affected SG, and 20% of row 4 in the unaffected SG P/S Sizing of u-bend circumferential PWSCC 20510.1

+Point /

E/D +Point 100% H/L TTS +3 to 13.5 below the bottom of the TTS and Exp I11524 +Point 100% of region in affected SG; ensure 20%

expansion transition; +Point inspection of cold leg Transition +Point / inspected in the other SG E/D/S bobbin I-Codes 96701.1

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Table 9-4: Inspection Scope Summary - Pitting Damage E/P Location Probe / ETSS Scope Expansion / Comments Mech. D/S Bobbin /

Pitting Sludge Pile P/D 100% bobbin exam of the region +Point all bobbin I-Codes 96005.2

+Point /

P/S +Point sizing of detected pitting 21998.1

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