ML17160A181

Summary of Conference Call with Palisades Nuclear Plant Regarding the Spring 2017 Steam Generator Inspections

ML17160A181
Person / Time
Site:	Palisades
Issue date:	06/14/2017
From:	Jennivine Rankin Plant Licensing Branch III
To:	Entergy Nuclear Operations
Rankin J, NRR/DORL/LPL3, 415-1530
Shared Package
ML17166A504	List: ML17160A181
References
CAC MF9396
Download: ML17160A181 (26)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 14, 2017 Vice President, Operations Entergy Nuclear Operations, Inc.

Palisades Nuclear Plant 27780 Blue Star Memorial Highway Covert, Ml 49043-9530

SUMMARY

OF CONFERENCE CALL WITH PALISADES NUCLEAR PLANT REGARDING THE SPRING 2017 STEAM GENERATOR INSPECTIONS (CAC NO. MF9396)

Dear Sir or Madam:

On May 5, 2017, the U.S. Nuclear Regulatory Commission (NRC) staff participated in a conference call with representatives of Entergy Nuclear Operations, Inc. regarding the ongoing steam generator inspection activities at the Palisades Nuclear Plant.

A list of the conference call participants is contained in Enclosure 1. A list of discussion questions were discussed on the call and are attached to the enclosed conference call summary in Enclosure 2.

If you have any questions regarding this matter, I may be reached at 301-415-1530.

Sincerely,

~:::::anager Plant Licensing Branch Ill Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-255

Enclosure:

1. List of Participants

2. Conference Call Summary cc: Distribution via ListServ

LIST OF PARTICIPANTS MAY 5. 2017, CONFERENCE CALL WITH ENTERGY NUCLEAR OPERATIONS, INC.

PALISADES NUCLEAR PLANT SPRING 2017 STEAM GENERATOR INSPECTIONS NUCLEAR REGULATORY COMMISSION Andrew Johnson Paul Klein Jennie Rankin Mel Holmberg Edison Fernandez Eric Duncan ENTERGY NUCLEAR OPERATIONS, INC.

Dustin Daggett Kevin O'Connor Joe Jerz Jim Miksa Barb Dotson Dan Meatheany Jeff Hardy Steve Brown Enclosure 1

CONFERENCE CALL

SUMMARY

REGARDING PALISADES NUCLEAR PLANT SPRING 2017 STEAM GENERATOR INSPECTIONS DOCKET NO. 50-255 CAC NO. MF9396 On May 5, 2017, the U.S. Nuclear Regulatory Commission (NRC) staff participated in a conference call with representatives of Entergy Nuclear Operations, Inc. (the licensee) regarding the ongoing steam generator (SG) inspection activities at Palisades Nuclear Plant (Palisades). The licensee-provided attachment is included at the end of this conference call summary. The data in the attachment is preliminary.

Palisades has two Combustion Engineering Model 2530 replacement SGs. Each SG has 8,219 mill-annealed Alloy 600 tubes with an nominal outside diameter of 0. 750 inches and a nominal wall thickness of 0.042 inches. Stainless steel, lattice-type tube supports, diagonal straps, and vertical straps support the tubes at various locations. The tubes were expanded through the full depth of the tubesheet using an explosive process.

Undefined abbreviations used in the licensee-provided document (Attachment 1) include:

• % TW - Percent Through-Wall

• NRC - U.S. Nuclear Regulatory

• +Pt - Plus-point Commission

• AILPC -Accident Induced Leakage

• ODSCC - Outside Diameter Stress Performance Criteria Corrosion Cracking

• C* - C-star

• PDA- Percent Degraded Area

• Circ - Circumferential

• psi - pounds per square inch

• CL - Cold-Leg

• POD - Probability of Detection

• CM - Condition Monitoring

• PWSCC - Primary Water Stress

• CMOA - Condition Monitoring Corrosion Operational Assessment Cracking

• DB - Diagonal Bar

• 1R25 or RF25 - Unit 1 Refueling

• ECT - Eddy Current Testing Outage 25

• EFPY - Effective Full Power Year

• SAi - Single Axial Indication

• EPRI - Electric Power Research

• SCI - Single Circumferential Institute Indication

• GPO - Gallons Per Day

• SG - Steam Generator

• HF - High Frequency

• SGMP - Steam Generator Management

• HL- Hot-Leg Program

• IQDA - Independent Qualified Data

• SIPC - Structural Integrity Analyst Performance Criteria

• ISi - lnservice Inspection

• SVI - Single Volumetric Indication

• MR - Mid-Range

• TEC - Tube End Cold

• NIA - Not Applicable

• TEH - Tube End Hot

• NDE - Non Destructive Examination

• TR-Topical Report Enclosure 2

• TSPs - Tube Support Plates

• V-Volts

• TIS - Top-of-tubesheet

• Vpp - Volts Peak-to-Peak

• TW - Through Wall

• VS - Vertical Strap Information exchanged during the call and not included in the licensee-provided information is summarized below:

• At the time of the call, the licensee was approximately 94 to 95 percent complete with their base scope of eddy current inspections.

• The licensee stated that an ODSCC indication was found in the free span region of the tube located in row 62, column 101 of SG B. The indication was between the 03 and 04 tube support plates on the HL side of SG B. There was no indication of a tube ding at this location. The indication had a measured voltage of 1.18 volts and a maximum depth of 71 percent TW. The indication had a structural equivalent length of 0.65 inches, a structural equivalent depth of 63.5 percent TW, and required in-situ pressure testing to confirm structural integrity of the tube. This indication was one of nine indications that were aligned over a 12-inch length of the tube.

• A historical review of eddy current inspection data was ongoing at the time of the call, but the licensee noted that a preliminary review back to 2010 showed no change in the indication requiring in-situ testing.

• The licensee stated that the wear growth in both SGs was very small and only one tube (in SG A) was found with wear greater than 40 percent TW.

• The licensee noted that at the time of the call, there were 15 potential tubes to be plugged in SG A and 3 potential tubes to be plugged in SG B. The licensee noted they are using mechanical rolled plugs.

• The in-situ testing was scheduled for Saturday, May 6, 2017. After the in-situ testing, foreign object search and retrieval (FOSAR) of possible loose parts (PLPs) would commence. The PLPs noted during the current inspection were mostly low voltage and had "sludge-like" indications. None of the PLPs were noted at upper tube support structures.

• Other than the free span indication that required in-situ pressure testing, there were no unexpected or unusual results.

• After the call, the licensee notified the NRC that the in-situ pressure testing was conducted at 2 pm on May 6, 2017. Two-minute hold points were performed at pressures of 1600 psi, 3000 psi, 4000 psi, and 4600 psi. No evidence of leakage was observed at any of the hold points.

The NRC staff did not identify any issues that required follow-up action at this time.

Attachment 1 STEAM GENERATOR TUBE INSPECTION DISCUSSION DURING PALISADES 2017 (RF25) OUTAGE (Preliminary Information)

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 (1 R25).

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 P~lisades 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 128432 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 128432. The regression slope and standard error of regression are retained. Only the intercept parameter is changed. This provides an across the board reduction of NOE 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 NOE maximum depths.

The deviation was implemented in the 2012 (1 R22) 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, LI-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.

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 (ONG) 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 (DOI), Differential Freespan Indication (DFI), Distorted Support Plate Indication (OSI),

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 2

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 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 O* O* N/A A Freespan Axial ODSCC O* O* N/A B Tube Supports Axial ODSCC O* O* 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.

3

SGA

• Axial ODSCC at TSH

+Point Probe. ETSS 1-28431 60 60 00{) '.l2'3 100 Burst Equivalent length (Inches)

"' 225

• 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

• Gire 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 at TSH

-+Point Probe, ETSS 1-28431 so I ---Lm*

• Flaws 70 O'--~~~~~~~~~~~~~---'

000 075 '50 Burst Equivalent Length (Inches)

• 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 Frees pan 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.

5

6. Describe repair/plugging plans.

Currently there are 15 potential tubes requiring tube plugging in SG E-50A and 3 potential tubes in SG E-508.

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-508 105 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.

6

Indications of tube damage associated with the loose parts 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

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Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Table 8-1: Eddy Current technique Table Degradation

~~~~e EPRI Demonstrated Applicability ~~:nded Detection? Sizing? POD izing Parameters Mechanism ETSS licabilitv BOBBIN Depth= 0.94*NDE + 1.24 Sy,x rrube to Tube 13091.1 Bobbin Freespan tube-to-tube wear None Yes CMOA = 1.57 Wear Rev. O N = 40 R= 1.0 Freespan (excluding u-bend), POD: Log-Logistic 128413 Axial ODSCC Bobbin eggcrate, sludge pile, & broached None Yes No Slope = 4.296 Rev. 3 TSPs with or without dents S2Voo Intercept = -5.679 24013.1 lAxial ODSCC Bobbin Freespan including dings S5V 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); 1-690 tubing ~00 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 ~op per N = 62, R = 0.41 Axial ODSCC Depth = 0.9994*NDE + 0.4998 Sy,x = 11.856 128424 N = 589, R = 0.88 Rev. 3 Depth: CMOA (detect); POD: Log-Logistic BED= 0.9941*NDE + 2.7324

~SP (with or without dents Axial ODSCC +Point' None Yes BED: CMOA Slope = 11 .4155 Sy,x = 10.685

<=2vpp) and sludge pile 128431 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 1 R25 Inspection, Spring 2017 Degradation Probe EPRI Extended Demonstrated Applicability Detection? Sizing? POD Sizing Parameters Mechanism Tvoe ETSS ~pplicability Depth = 1.0069*NDE + 0.3736 Sy,x = 12.329 128425 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 128432 without dents S2Vpp 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. O bends R=0.69 PDA = 0.3*NDE +26.49 Sy,x =

18.14 PDA: Information N = 9 R = 0.36 121409.1 Support structures, freespan, Axial ODSCC +Point' Li-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 122401.1 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 120511.1 Axial PWSCC +Point' Expansion Transitions Tubesheet Yes PDA: Information = 7.95 Rev. 8 N = 32, R= 0.33 Length: CMOA Length =1.1 O*NDE - 0.01 Sy,x

= 0.13 N = 32, R= 0.87

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Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017 Table 8-1: Eddy Current technique Table

~~~:e ~~~nded Degradation EPRI Demonstrated Applicability etection? izing? POD izing Parameters Mechanism ETSS licabilitv BOBBIN Depth= 0.94*NDE + 1.24 Sy,x rrube 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 128413 Axial ODSCC Bobbin ~ggcrate, sludge pile, & broached None Yes No Slope = 4.296 Rev. 3

~SPs with or without dents S2Vpp Interceot = -5. 679 24013.1 Axial ODSCC Bobbin Freespan including dings S5V 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); 1-690 tubing KJOO 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 op per N = 62, R = 0.41 Axial ODSCC Depth = 0.9994*NDE + 0.4998 Sy,x=11.856 128424 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 128431 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 rrvpe ETSS APPlicabilitv Depth = 1.0069*NDE + 0.3736 Sy,x = 12.329 128425 N = 676, R = 0.862 Rev. 3 Depth: CMOA (detect) Freespan (excluding u-bend), POD: Log-Logistic BED = 0.972*NDE + 3.698 lAxial ODSCC +Point' eggcrate, & broached TSPs with or None Yes BED: CMOA Slope= 6.7176 Sy,x = 12.153 128432 !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-lAxial 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, lAxial 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 =1.1 O*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 l4oolicabilitv Depth = 0.90*NDE + 7.56 Sy,x

= 15.28 Depth: CMOA N = 46, R= 0.81 96703.1 rrubesheet,

~xial 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-

~xial 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 111524 Circ PWSCC +Point' Expansion Transitions Dents/Dings, Yes No Slope = -20.522 Rev. O 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 rrvpe ETSS APPiicabiiity 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 Gire PWSGG +Point' Expansion Transitions U-bends GMOA 6.98 Rev. 7 111524)

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

= 0.26 N = 37, R= 0.89 96511.2 GircPWSGG +Point' See "Axial PWSGG" 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 GircPWSGG +Point' Expansion Transitions GMOA 7.53 Rev. 12 ubesheet 111524)

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

= 0.15 N = 16, R= 0.97

+Point' 99997.2 Gire PWSGG See "Axial PWSGG" 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 GMOA = 1.50 Wear Rev. 1 N = 40 R= 1.0 Dented/non-dented Supports, Depth = f.06*NDE + 0.13 Sy,x 10908.4 Wear +Point' AVBs Foreign object Yes GMOA = 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 hrough Freespan Wear Yes GMOA present) ETSS (10.b]

(Note 1) Pancake ~7907 (part not present)

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

Steam Generator Degradation Assessment for Palisades 1R25 Inspection, Spring 2017

~~~~e ~~:nded Degradation EPRI Demonstrated Applicability Detection? izing? POD Sizing Parameters Mechanism ETSS licabilitv Specialty Probes PDA = 0.38*NDE +35.92 Sy,x

= 14.92 Both: CMOA N = 26 R = 0.42

!Ghent 20407.1 lA.xial ODSCC Support structures & freespan None Yes (Note2) 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 205081 Axial PWSCC Expansion Transitions None Yes = 0.15 (Note 2) Rev. 6 (Length Onlvl N = 32 R = 0.8 Ghent 20509.1 Axial PWSCC Dented support structures None Yes Not qualified (Note2) 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 120406.1 h"op of tubesheet & expansion = 0.54 CircODSCC None Yes PDA: CMOA (Note 2) Rev. 7 ransitions 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 lcirc PWSCC Expansion Transitions None Yes CMOA = 0.27 (Note2) 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 NOE 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-Pl, which utilized the same sizing methodology as ETSS H-21410.1. The performance parameters are as follows: Depth= l .O*NDE, Sy,x = 13.8; PDA =

1.05 *NOE - 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 I Comments Mech. D/S Bobbin I +Point all new wear, all wear <:40% TW, all bobbin

!Wear Egg crates E/D/S 100% bobbin except row 1-3 u-bends.

96004.1 I-codes DBNS

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

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

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

+Point 10908.4 100% +Point row 1-3 u-bends, plus all bobbin indications of E/D/S K;oincident 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) ,esting will be required of wear (see CDME-07-119) 1 Bobbin I 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 I +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 27901-127901 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 I Comments Mech. DIS Bobbin I Axial EID 100% bobbin except row 1-3 u-bends. +Point all bobbin I-Codes Non-dented and 128413 ODSCC 5 2Vpp Dented

+Point I Eggcrates DBNS EID +Point inspection of all bobbin I-Codes for ODSCC detection 128425 Freespan

+Point I E/S +Point depth and length sizing of detected ODSCC 128432

+Point Row 1-

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

10411.1 Bobbin I Freespan Ding E/D 100% bobbin except row 1-3 u-bends. +Point all bobbin I-Codes 24013.1 5 5Vpp

+Point I +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 I +Point inspection to detect and length size axial ODSCC at

~2401.1 dinged and dented locations.

Dented >2Vpp Eggcrates DBNS

+Point I +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 EID 128424 ransition; +Point inspection of cold leg bobbin I-Codes inspected in the other SG Exp Transition

+Point I +Point inspection for depth and length sizing of detected Axial E/S 128431 ODSCC indications at the sludge pile and expansion transitions.

+Point I (MR) fll.xial 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 Pf the affected SG, and 20% of row 4 in the unaffected SG.

+Point I (HF)

E/D/S 99997.2 Dented Eggcrates P/D/S +Point I +Point all >2Vpp dents at structures and dings >5Vpp in If an indication is detected, then a scope expansion will be DBNS 96703.1 '°reespan; +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 I +Point 100% of region in affected SG; ensure 20%

Exp Transition E/D/S ~xpansion transition; +Point 20511.1 inspected in the other SG inspection of cold leQ bobbin I-Codes 1

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 I Comments Mech. DIS Row 1-3 U- +Point I 22842.1 & If sec is detected in row 3, then inspect all u-bends in row 4 Gire ODSCC P/DIS 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 PIDIS +Point I 22842.1 &

+Point all >2Vpp dents at structures and dings >5Vpp If an indication is detected, then a scope expansion will be DBNS 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% HIL TIS +3" to 13.5" below the bottom of the

+Point I Expansion EIDIS expansion transition; +Point inspection of cold 21410.1 +Point 100% of region in affected SG; ensure 20%

Transition leQ bobbin I-Codes inspected in the other SG Expansion +Point I EPRI TR-EIS Sizing of circumferential indications per EPRI TR-107197-P1 Transition 107197-P1

+Point (MR) I Circ PID 100% +Point row 1-3 u-bends Row 1-3 U- 96511.2 If SCC is detected in row 3, then inspect all LI-bends in row 4 PWSCC of the affected SG, and 20% of row 4 in the unaffected SG bends +Point (HF) I PID

~9997.2 Dented +Point I +Point all >2Vpp dents at structures and dings >5Vpp in PID If an indication is detected, then a scope expansion will be Eggcrates 111524 'reespan; +Point inspection of bobbin I-Codes determined based on the dent voltage and significance of DBNS. Dinged +Point I PIS Sizing of circumferential PWSCC the circumferential indication Freespan 96701.1

+Point I PID 100% +Point row 1-3 u-bends Row 1-3 U- 111524 If sec is detected in row 3, then inspect all LI-bends in row 4 bends +Point I of the affected SG, and 20% of row 4 in the unaffected SG PIS Sizing of u-bend circumferential PWSCC 120510.1

+Point I EID +Point 100% HIL TIS +3" to 13. 5" below the bottom of the TIS and Exp 111524 +Point 100% of region in affected SG; ensure 20%

expansion transition; +Point inspection of cold leg Transition +Point I inspected in the other SG EIDIS 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 I Comments Mech. D/S Bobbin I Pitting Sludge Pile P/D 100% bobbin exam of the region +Point all bobbin I-Codes 96005.2

+Point I P/S +Point sizing of detected pitting

~1998.1

PKG ML17166A504 Summary ML17160A181 Attachment ML17166A497 *via memo OFFICE N RR/DORL/LPL3/PM N RR/DORL/LPL3/LA NRR/DE/ESGB/BC(A)*

NAME JRankin SRohrer AJohnson DATE 6/12/2017 6/12/2017 5/31/2017 OFFICE NRR/DORL/LPL3/BC NRR/DORL/LPL3/PM NAME DWrona JRankin DATE 6/13/2017 6/14/2017