Text

Unit 2 Cycle 13 (U2C13) 90-Day Steam Generator (S/G) Report for Voltage-Based Alternate Repair Criteria and W* Alternate Repair Criteria
	ML052340503
Person / Time
Site:	Sequoyah
Issue date:	08/15/2005
From:	Pace P; Tennessee Valley Authority
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	SG-SGDA-05-29
	Download: ML052340503 (122)
	v • d • e

Tennessee Valley Authority, Post Office Box 2000, Soddy-Daisy, Tennessee 37384-2000 August 15, 2005 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of ) Docket No. 50-328 Tennessee Valley Authority )

SEQUOYAH NUCLEAR PLANT (SQN) - UNIT 2 - UNIT 2 CYCLE 13 (U2C13) 90-DAY STEAM GENERATOR (S/G) REPORT FOR VOLTAGE-BASED ALTERNATE REPAIR CRITERIA AND W* ALTERNATE REPAIR CRITERIA In accordance with SQN Unit 2 License Condition 2.C.(8)(b), and NRC Generic Letter (GL) 95-05, , Section 6.b, TVA is providing the 90-day S/G report (Enclosure 1). The report contains results of voltage-based repair criteria that were applied during the U2C13 refueling outage S/G inspections (end of cycle 13 operation). The voltage-based repair criteria are for axial outside diameter stress corrosion cracking (ODSCC) at tube support plate intersections. The report contains a condition monitoring assessment that demonstrates that the GL 95-05 acceptance criteria are satisfied at the end of the Unit 2 operation cycle 13 and an operational assessment that demonstrates that the GL 95-05 acceptance criteria is expected to continue to be satisfied throughout Unit 2 cycle 14.

In accordance with SQN Unit 2 Technical Specification Surveillance Requirement 4.4.5.5.e, TVA is providing the 90-day S/G report associated with the application of W*

during the U2C13 refueling outage (Enclosure 2). The cumulative leak rates as calculated from W* and the GL 95-05 alternate repair criteria were within the SQN Unit 2 accident leakage limit (3.7 gallons per minute).

`xz30 Pled on wed pa4

U. S. Nuclear Regulatory Commission Page 2 August 15, 2005 This letter does not contain TVA commitments. If you have any questions, please call me at (423) 843-7170 or J. D. Smith at (423) 843-6672.

Sincerely, P. L. Pace Manager, Site Licensing and Industry Affairs Enclosures cc (Enclosures):

Mr. Douglas V. Pickett, Senior Project Manager U.S. Nuclear Regulatory Commission Mail Stop 08G-9a One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2739 I:License/Steam Generators/U2C13 90-Day SG Report

ENCLOSURE 1 TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT UNIT 2 STEAM GENERATOR REPORT VOLTAGE BASED ALTERNATE REPAIR CRITERIA UNIT 2 CYCLE 13 90-DAY REPORT

Westinghouse Non-Proprietary Class 3 SG-SGDA-05-29 August 2005 Revision 0 Condition Monitoring and Operational Assessment:

GL-95-05 Alternate Repair Criterion End of Cycle 13 90 Day Report Sequoyah Unit 2 Prepared for the Tennessee Valley Authority O) Westinghouse

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WESTINGHOUSE NON-PROPRIETARY CLASS 3 SG-SGDA-05-29 Revision 0 Tennessee Valley Authority Condition Monitoring and Operational Assessment:

GL-95-05 Alternate Repair Criterion End of Cycle 13 90 Day Report Sequoyah Unit 2 Author's Name Signature / Date For Pages Thomas P. Magee Official Record ElectronicallyApproved in EDMS All Verifier's Name Signature / Date For Pages David J. Ayres Official Record Electronically vroved in EDMS All Manager Name Signature I Date For Pages Earl P. Morgan Official Record ElectronicallyApproved in EDMS All This report has been prepared by Westinghouse Electric Company LLC and bears a Westinghouse Electric Company copyright notice. You are permitted to copy and redistribute all or portions of the report; however all copies made by you must include the copyright notice in all instances.

iii TABLE OF CONTENTS TABLE OF CONTENTS .................. iii LIST OF TABLES ................. iv LIST OF FIGURES .................. v Glossary of Acronyms ................... vi 1.0 Introduction .1-1 2.0 Summary and Conclusions .2-1 3.0 EOC-13 Inspection Results .3-1 3.1 Voltage Distributions at EOC-13 .3-1 3.2 Voltage Growth Rates for Cycle 13 .3-18 4.0 Analysis Methods and Data Base for ARC Correlations .4-1 4.1 Tube Material Properties .4-1 4.2 Burst Correlation .4-2 4.3 Leak Rate Correlation .4-3 4.4 Probability of Leak Correlation .4-4 4.5 NDE Uncertainties .4-4 4.6 Upper Voltage Repair Limit .4-5 4.7 Probe Wear .4-5 5.0 Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 .5-1 5.1 Analysis Approach .5-1 5.2 EOC-13 Burst Probabilities and Leak Rates .5-6 5.3 Comparison with Acceptance Criteria and Prediction .5-7 6.0 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 .6-1 6.1 Analysis Approach .6-1 6.2 POD .6-1 6.3 Voltage Growth Rates for Cycle 14 .6-2 6.4 Prediction of Voltage Distributions at EOC-14 .6-2 6.5 Prediction of Tube Leak Rates and Burst Probabilities at EOC-14 .6-9 6.6 Comparison with Acceptance Criteria .6-9 7.0 References .7-1 Appendix A ....... A-1 Table of Contents August 2005 SG-SGDA-05-29 Revision 0

iv LIST OF TABLES Table 3-1: Inspection Results for SG 1 EOC-13 .......................................................... 3-2 Table 3-2: Inspection Results for SG 2 EOC-13 .......................................................... 3-3 Table 3-3: Inspection Results for SG 3 EOC-13 .......................................................... 3-4 Table 3-4: Inspection Results for SG 4 EOC-13 .......................................................... 3-5 Table 3-5: Voltage Changes from EOC-12 to EOC-13, SG 1................................................... 3-19 Table 3-6: Voltage Changes from EOC-12 to EOC-13, SG 2 ................................................... 3-20 Table 3-7: Voltage Changes from EOC-12 to EOC-13, SG 3................................................... 3-21 Table 3-8: Voltage Changes from EOC-12 to EOC-13, SG 4 ................................................... 3-22 Table 3-9: Voltage Changes from EOC-12 to EOC-13, Bound of All SGs .............................. 3-23 Table 4-1: Effect of Database Changes on the 7/8" Tube Burst Pressure vs. Bobbin Amplitude Correlation .......................................................... 4-2 Table 4-2: Effect of Added Data on the 7/8" Tubes Leak Rate vs. Bobbin Amplitude Correlation (2560 psi)...................................................................................................... 4-3 Table 4-3: Effect of Additional Data on the 7/8" Tube Probability of Leak Correlation ............ 4-4 Table 5-1: Analysis Results for EOC-13 Voltage Distributions with NDE Uncertainty ............ 5-6 Table 5-2: Predicted Results .......................................................... 5-6 Table 6-1: BOC-14 Voltage Distributions .......................................................... 6-1 Table 6-2: EOC-14 Voltage Distributions .......................................................... 6-2 Table 6-3: EOC-14 Predicted Results .......................................................... 6-9 List of Tables August 2005 SG-SGDA-05-29 Revision 0

V LIST OF FIGURES Figure 3-1: Sequoyah-2 EOC-13 Voltage Distribution, SG 1..................................................... 3-6 Figure 3-2: Sequoyah-2 EOC-13 Voltage Distribution, SG 2 ..................................................... 3-7 Figure 3-3: Sequoyah-2 EOC-13 Voltage Distribution, SG 3..................................................... 3-8 Figure 3-4: Sequoyah-2 EOC-13 Voltage Distribution, SG 4 ..................................................... 3-9 Figure 3-5: Sequoyah-2 EOC-13 Repaired Indications, SG I................................................... 3-10 Figure 3-6: Sequoyah-2 EOC-13 Repaired Indications, SG 2 ................................................... 3-11 Figure 3-7: Sequoyah-2 EOC-13 Repaired Indications, SG 3................................................... 3-12 Figure 3-8: Sequoyah-2 EOC-13 Repaired Indications, SG 4 ................................................... 3-13 Figure 3-9: Sequoyah-2 EOC-13 Indications Returned to Service, SG 1................................. 3-14 Figure 3-10: Sequoyah-2 EOC-13 Indications Returned to Service, SG 2 ............................... 3-15 Figure 3-11: Sequoyah-2 EOC-13 Indications Returned to Service, SG 3 ............................... 3-16 Figure 3-12: Sequoyah-2 EOC-13 Indications Returned to Service, SG 4 ............................... 3-17 Figure 3-13: Sequoyah-2 Voltage Growth per Cycle 13 ........................................................... 3-24 Figure 3-14: Sequoyah-2 Voltage Growth Detail ........................................................... 3-25 Figure 3-15: Cycle 12 and Cycle 13 Bounding Growth Rates, per EFPY ................................ 3-26 Figure 3-16: Cycle 12 and Cycle 13 Bounding Growth Rates, per EFPY, Detail View ........... 3-27 Figure 3-17: Growth as a Function of BOC Voltage ........................................................... 3-28 Figure 4-1: Retest Voltage vs. First Test Voltage of Indications Originally Measured to be Greater than 1.5 Volts with Worn Probe ................................................ ........... 4-7 Figure 4-2: Retest Voltage vs. First Test Voltage of Indications Originally Measured to be Less than 1.5 Volts in Tubes Retested for Probe Wear .............................................. 4-8 Figure 5-1: Voltage Distribution with NDE Uncertainty, SG 1.................................................. 5-2 Figure 5-2: Voltage Distribution with NDE Uncertainty, SG 2 .................................................. 5-3 Figure 5-3: Voltage Distribution with NDE Uncertainty, SG 3 .................................................. 5-4 Figure 5-4: Voltage Distribution with NDE Uncertainty, SG 4 .................................................. 5-5 Figure 6-1: Predicted Voltage Distribution, SG I ........................................................... 6-5 Figure 6-2: Predicted Voltage Distribution, SG 2 ........................................................... 6-6 Figure 6-3: Predicted Voltage Distribution, SG 3........................................................... 6-7 Figure 6-4: Predicted Voltage Distribution, SG 4 ........................................................... 6-8 List of Figures August 2005 SG-SGDA-05-29 Revision 0

vi GLOSSARY OF ACRONYMS BOC - Beginning of operation cycle. The current inspection is just prior to BOC-14.

EOC - End of operation cycle. The current inspection is at EOC-13. The end of the next cycle is EOC-14.

NODP - Normal operating differential pressure.

MRPC - Motorized rotating pancake coil. Also refers to the Plus-Point coil.

ODSCC - Outside diameter stress corrosion cracking.

POD - Probability of detection. This value is set equal to 0.60 for the GL-95-05 predictive analysis for the condition of the steam generators at the end of the next cycle.

SG - Steam generator identifier. Specifically SG 1, SG 2, SG 3 and SG 4.

TSP - Tube support plate. The generic letter 95-05 alternate repair criterion applies to ODSCC in the tubes at the TSPs.

List of Figures August 2005 SG-SGDA-05-29 Revision 0

i-1

1.0 INTRODUCTION

Sequoyah Unit 2 completed its Cycle 13 of operation and subsequent steam generator tube inspection in May 2005. Axial ODSCC has been confirmed within the TSP regions of the steam generators and is a current degradation mechanism at Sequoyah Unit 2. The alternate repair criterion (ARC) defined in NRC Generic Letter 95-05 (Reference 1) is implemented at Sequoyah Unit 2. This report provides a condition monitoring assessment that demonstrates that the GL 05 acceptance criteria were satisfied at the end of operational Cycle 13 (EOC-13), and an operational assessment that demonstrates that the GL-95-05 acceptance criteria will continue to be satisfied throughout operational Cycle 14. A Sequoyah-2 specific voltage growth rate was used in the EOC-14 prediction.

The operation cycle just completed, Cycle 13, was 470.9 Effective Full Power Days (EFPD). The next cycle, Cycle 14 is estimated to be 545 EFPD (Reference 2).

Introduction August 2005 SG-SGDA-05-29 Revision 0

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Introduction August 2005 SG-SGDA-05-29 Revision 0

2-1 2.0

SUMMARY

AND CONCLUSIONS Bobbin voltage indications of ODSCC at the tube support plates were detected and measured in all four steam generators. Based on this voltage distribution, using the methodology of References I and 3, a Condition Monitoring evaluation including the computation of the probability of tube burst (POB) and the amount of leakage predicted for steam line break conditions at EOC-13 was performed. The acceptance criteria on POB and leakage are satisfied with significant margin.

The change in voltage from the previous inspection was determined by historical review for each indication detected. The apparent voltage growth rate during Cycle 13 was based on the historic review of 1847 DSI indications identified during the Sequoyah Unit 2 EOC-13 inspection. An operational assessment prediction of the POB and leakage at steam line break conditions at EOC-14 was performed using a site specific bounding growth rate. The results indicate that the acceptance criteria on POB and leakage at EOC-14 will be satisfied with acceptable margin.

Therefore the Reference 1 acceptance criteria will be satisfied throughout Cycle 14.

Summary and Conclusions August 2005 SG-SGDA-05-29 Revision 0

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Summary and Conclusions August 2005 SG-SGDA-05-29 Revision 0

3-1 3.0 EOC-13 INSPECTION RESULTS 3.1 VOLTAGE DISTRIBUTIONS AT EOC-13 Summaries of eddy current signal voltage distributions at the drilled support plates, for each steam generator, are shown in Table 3-1 through Table 3-4. Also shown are the number of indications in each voltage range detected at EOC-13 and the number of indications removed from service due to tube repairs for any reason. The number of indications that remain in service for Cycle 14 is the difference between the number of indications detected and the number of indications removed from service. No tubes were unplugged with the intent to return them to service after inspection.

Appendix A contains a listing of all DSI indications and their repair status. All DSI indications with an EOC-13 voltage greater to or equal to 2 volts were subject to Plus Point inspections, in accordance with Reference 1 requirements for 7/8-inch diameter tubing. Plugging repaired indications confirmed as being present by the Plus Point inspection.

The summary of all four-steam generators shows the following:

A total of 1847 TSP regions were identified as having ODSCC bobbin signal indications (DSIs) during the inspection. One additional TSP region was identified as having ODSCC by MRPC, but without a bobbin DSI.

As noted in Reference 4, Sequoyah-2 does not have intersections that are excluded from the voltage-based repair criteria (Section 1.b.1 of Reference 1). None of these 1847 indications were associated with a dent signal greater than 5 volts, copper deposits, or mixed residuals of sufficient magnitude to cause a 1.0 volt ODSCC indication to be missed or misread

Of the 1847.TSP regions, 3 had DSI indications above 2 volts.

All indication with voltages greater than or equal to 2 volts, were subjected to an inspection with a Plus Point probe. Indications that confirmed during the Plus Point inspection were removed from service by plugging.

All of the 3 TSP regions with indications above 2 volts were repaired by plugging. All of the tubes associated with these TSP regions were plugged because of MRPC-confirmed ODSCC at that particular support plate.

A total of 13 of the 1847 TSP regions were removed from service for reasons other than MRPC-confirmed ODSCC at the support plates Figure 3-1 through Figure 3-12 illustrates the voltage distribution in each steam generator. Figure 3-1 through Figure 3-4 show the detected voltage distribution compared to the predicted distribution which was developed in the previous 90-day report, Reference 5. Figure 3-5 through Figure 3-8 show the distribution of repaired indications, and Figure 3-9 through Figure 3-12 show the distribution of indications that remain in service for the next operating cycle.

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-2 Table 3-1: Inspection Results for SG 1 EOC-13 In-Service MRPC MRPC Number of Tested Not Returned Confirmed Voltage Indications MRPC But Not MRPC to or not Bin (see Note) Confirmed Confirmed Tested Plugged Service Tested 0.2 8 8 8 8 0.3 41 1 40 41 41 0.4 50 50 50 50 0.5 42 3 . 39 42 42 0.6 36 1 35 36 36 0.7 36 1 35 1 35 35 0.8 27 2 25 27 27 0.9 21 1 1 19 21 20 1 11 1 2 8 11 9 1.1 10 8 2 10 8 1.2 7 5 2 7 5 1.3 2 1 1 2 1 1.47 1 1 1 1 1.66 1 1 . 1 1 1.95 1 1 1 1 Total 294 27 8 259 1 293 285 Average voltage = 0.569 volts Note: This summary does not include the SG 1 H02 intersection of Row 4 Column 14. This intersection did not have a DSI call by Bobbin coil, but it did have a 0.25 Volt SAI call by MRPC. Because this intersection had a 2.51 Volt DNT call, a reliable estimation of the DSI voltage from the SAI voltage cannot be made. This tube was plugged.

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-3 Table 3-2: Inspection Results for SG 2 EOC-13 In-Service MRPC MRPC Tested Not Returned Confirmed Voltage Number of MRPC But Not MRPC to or not Bin Indications Confirmed Confirmed Tested Plugged Service Tested 0.2 13 2 11 13 13 0.3 32 2 30 32 32 0.4 54 1 53 1 53 53 0.5 58 5 1 52 1 57 56 0.6 31 1 30 31 30 0.7 37 5 1 31 37 36 0.8 30 1 29 1 29 29 0.9 16 2 14 1 15 15 1 12 1 11 1 11 11 1.1 7 7 1 6 6 1.2 5 5 5 5 1.3 6 6 6 6 1.39 1 1 1 1 1.57 1 1 _ _ _ _ _ _ _ _ 1 1 1.62 1 1 1 1 1.97 1 1 Total 305 41 3 261 7 298 295 Average voltage = 0.562 volts EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-4 Table 3-3: Inspection Results for SG 3 EOC-13 In-Service MRPC MRPC Tested Not Returned Confirmed Voltage Number of MRPC But Not MRPC to or not Bin Indications Confirmed Confirmed Tested Plugged Service Tested 0.2 9 9 9 9 0.3 36 36 1 35 35 0.4 41 1 40 41 41 0.5 59 1 58 1 58 57 0.6 46 7 2 37 46 44 0.7 55 2 1 52 55 54 0.8 44 2 2 40 1 43 42 0.9 24 4 1 19 24 23 1 23 3 5 15 23 18 1.1 19 17 2 19 17 1.2 17 14 3 17 14 1.3 13 13 _ _ 13 13 1.4 8 5 3 8 5 1.5 6 6 6 6 1.6 5 4 1 1 4 3 1.7 1 1 1 1 1.8 3 3 3 3 2.1 2 2 = 2 _

2.3 6 1 1 _ _ _ _ _ _ _ _ _ 1 _ _ _ _ _ _ _ _ _ _

Total 412 85 21 306 7 405 385 Average voltage = 0.694 volts EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-5 Table 3-4: Inspection Results for SG 4 EOC-13 In-Service MRPC MRPC Tested Not Returned Confirmed Voltage Number of MRPC But Not MRPC to or not Bin Indications Confirmed Confirmed Tested Plugged Service Tested 0.2 20 20 20 20 0.3 83 1 82 1 82 82 0.4 128 4 124 1 127 127 0.5 135 3 132 1 134 134 0.6 116 3 1 112 116 115 0.7 95 2 1 92 95 94 0.8 72 2 1 69 1 71 70 0.9 66 66 66 66 1 44 3 41 1 43 43 1.1 26 26 - 26 26 1.2 18 18 18 18 1.3 11 11 I_11 11 1.4 7 6 1 7 6 1.5 5 5 5 5 1.6 5 5 5 5 1.7 4 4 4 4 1.74 1 1 1 Total 836 94 4 738 6 830 826 Average voltage = 0.605 volts EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-6 60 50 II 0

40 0

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3-7 70 60 50 -

i 40 -

Predicted 0

Measured j 30-z 20 -

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_.__...* I ' Ir r T rI I I OI II _, I I II. I . -. I P ¢ t- 0e _ M I 0 0 C 0; 0 -4 - - -4 e- Cd e- en r- Xc 00 00 00 Voks Figure 3-2: Sequoyah-2 EOC-13 Voltage Distribution, SG 2 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-8 70 60 I

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'tr* t- _ C 0 cc en en r 'T t-06 0 esI e'i ef e c- ON en E ONC 0 - _ - o6 X Xc Voks Figure 3-3: Sequoyah-2 EOC-13 Voltage Distribution, SG 3 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-9 180 160 I

120 0

100 0

1 80 z

60 40 I

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t O O 0n of 4^ 00 xt ' 't en 1O a' om eq W 00 6 6 6 -_4 - -_lcc e- ei ei 0x Voks Figure 3-4: Sequoyah-2 EOC-13 Voltage Distribution, SG 4 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-10 5

4

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0 o CO 0 _ _ _ _1 _ _ _e _ _

Vohs Figure 3-5: Sequoyah-2 EOC-13 Repaired Indications, SG 1 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-11 C

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I I Figure 3-6: Sequoyah-2 EOC-13 Repaired Indications, SG 2 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

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0 0 0 0 0 0 00 - -4 ~zCliC Clca Ca Vols Figure 3-7: Sequoyah-2 EOC-13 Repaired Indications, SG 3 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

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I e 't k tF 00 Ch - - 't m %D r- 00 o o d d o 6 6 _ _4 _4 - _ - - _

Volts Figure 3-8: Sequoyah-2 EOC-13 Repaired Indications, SG 4 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-14 60 50 40 f.E

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4- 30 0

z 20 10 0 I I II I I I II I I e1 I 4 kn O 0X - - l en 't i O 00 OX 6 6 6 6 6 6 6 o - - -4 _ -_ -__

Voks Figure 3-9: Sequoyah-2 EOC-13 Indications Returned to Service, SG I cot; EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-15 60 1 1 I 1 I I I e'4 en I m O r x ot - -_O N M -t m O r- 0cx e 6 6 o o 6 6 6 _ - -- _ - - - _

Voks Figure 3-10: Sequoyah-2 EOC-13 Indications Returned to Service, SG 2 COo EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-16 70 60 b

50

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All Reiwmed to Servie 0

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3-17 160 140 120 -

a

'4-100-

Al Reurned to Service j, 80 -

Confinend or Not Tested 60-40-20 0-II 6;

e o5 6t 5

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6 ;

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11 Voks

. It 'r '. I-x 00 Figure 3-12: Sequoyah-2 EOC-13 Indications Returned to Service, SG 4 C0Q9 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-18 3.2 VOLTAGE GROWTH RATES FOR CYCLE 13 Voltage growth was determined by the difference between the EOC-13 and EOC-12 voltages for each indication. The EOC-12 voltages were determined by historical reviews of the prior cycle data base and were established using the same techniques as used to analyze the EOC-13 data.

The voltage change is for the 470.9 EFPD cycle length of Cycle 13. The voltage at EOC-12 is provided for indications detected at EOC-13 in Appendix A.

The procedure for computing the voltage change and binning the values is described in Reference 3. Negative voltage changes are included in the 0 change bin. For cases where an EOC-13 indication did not have a corresponding EOC-12 indication, that EOC-13 indication was not included in the growth rate determination. Voltage change distributions for each steam generator are included in Table 3-5 through Table 3-8. These tables also include the average percent change in voltage, obtained for each steam generator by dividing the average change in volts (from EOC-12 to EOC-13) by the average EOC-12 voltage. A bounding EOC-13 specific growth rate distribution was used as defined in Table 3-9. A comparison of the steam generator specific growth rates and the EOC-13 bounding growth rate is shown in Figure 3-13 and the tail end is shown in detail in Figure 3-14.

Figure 3-15 presents a comparison of the bounding growth rates from Cycle 12 with that from Cycle 13. The data has been normalized to a 1 EFPY basis (365.25 EFPD). Figure 3-16 provides a detailed view of the tail of the curve. From these figures it is clear that the growth rate in Cycle 12 bound those from Cycle 13, thus the Cycle 12 growth rate is used in the projections.

Figure 3-17 presents a plot of the voltale growth as a function of the BOC voltage. A regression line of the data is also included. The R value for the regression (0.025) indicates that growth is not dependent on BOC voltage.

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-19 Table 3-5: Voltage Changes from EOC-12 to EOC-13, SG I SG 1 Change Number of Cumulative in Volts Indications Distribution 0 99 0.344948 0.1 86 0.644599 0.2 48 0.811847 0.3 27 0.905923 0.4 14 0.954704 0.5 12 0.996516 0.6 1 1 Total 287 Average change = growth / EOC-12 volts = 12%

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-20 Table 3-6: Voltage Changes from EOC-12 to EOC-13, SG 2 SG2 Change Number of Cumulative in Volts Indications Distribution 0 134 0.442244 0.1 80 0.706271 0.2 46 0.858086 0.3 26 0.943894 0.4 9 0.973597 0.5 7 0.9967 0.6 0.9967 0.7 i 0.9967 0.8 0.9967 0.9 0.9967 1.2 0.9967 1.4 1 1 Total 303 Average change = growth / EOC-12 volts =5%

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-21 Table 3-7: Voltage Changes from EOC-12 to EOC-13, SG 3 SG3 Change Number of Cumulative in Volts Indications Distribution 0 99 0.256477 0.1 100 0.515544 0.2 89 0.746114 0.3 48 0.870466 0.4 28 0.943005 0.5 7 0.96114 0.6 6 0.976684 0.7 5 0.989637 0.8 2 0.994819 0.9 1 0.997409 1.2 0.997409 1.4 1 1 Total 386 Average change = growth / EOC-12 volts = 19%

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-22 Table 3-8: Voltage Changes from EOC-12 to EOC-13, SG 4 SG4 Change Number of Cumulative in Volts Indications Distribution 0 317 0.383313 0.1 281 0.723096 0.2 150 0.904474 0.3 46 0.960097 0.4 15 0.978235 0.5 8 0.987908 0.6 5 0.993954 0.7 2 0.996372 0.8 1 0.997582 0.9 1 0.998791 1.2 1 1 Total 827 Average change = growth / EOC-12 volts = 8%

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

I 3-23 Table 3-9: Voltage Changes from EOC-12 to EOC-13, Bound of All SGs Bounding Change Cumulative in Volts Distribution 0 0.256477 0.1 0.515544 0.2 0.746114 0.3 0.870466 0.4 0.943005 0.5 0.96114 0.6 0.976684 0.7 0.989637 0.8 0.994819 0.9 0.9967 1.2 0.9967 1.4 1 EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-24 0.9-0.8 0.7 0.6 0.4 0.3 - 2 0.2 - SG4

- >-Bou nd 0.1 0

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 Growth (Voks/EFPY)

Figure 3-13: Sequoyah-2 Voltage Growti per Cycle 13 cOg EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-25 1

0.99 0.98 U

0.97 0.96 0.95 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 Growth (Voks/EFPY)

Figure 3-14: Sequoyah-2 Voltage Growth Detail EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-26 0 1 2 3 4 5 6 Voks/EFPY Figure 3-15: Cycle 12 and Cycle 13 Bounding Growth Rates, per EFPY C- I EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-27 I

0 1 2 3 4 5 6 Voks/EFPY Figure 3-16: Cycle 12 and Cycle 13 Bounding Growth Rates, per EFPY, Detail View Can-?-

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

3-28 2

0 0

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 EOC- 12 Voks Figure 3-17: Growth as a Function of BOC Voltage C\)

EOC-13 Inspection Results August 2005 SG-SGDA-05-29 Revision 0

4-1 4.0 ANALYSIS METHODS AND DATA BASE FOR ARC CORRELATIONS A Monte Carlo based computer program was used to perform the calculations prescribed in GL 95-05 (Reference 1). The methodology for predicting the EOC voltage distribution and computing the probability of burst and leakage at accident conditions is based on the Westinghouse Topical Report, WCAP-14277, Revision I (Reference 3) supplemented by recent changes in the leakage computation process, discussed in Reference 9 as amended in Reference

10. The EOC voltage distribution, probability of burst and the leakage are computed using the Cyclesim3.1 program, Reference 11.

The predictions for EOC-13 recorded in Reference 5 used the tube burst and leakage correlations of Addendum 5 to EPRI Report NP-7480-L modified according to References 9 and 10. Both the condition monitoring assessment for EOC-13 and the operational assessment predicting the EOC-14 voltage distribution are performed using the Addendum 6 database (Reference 6). Since Sequoyah Unit 2 can take credit for PORV actuation, the condition monitoring and operational assessments are performed using the leakage correlation for 2405 psi (Reference 2). The specific parameters used in the correlations are provided in Sections 4.1 through 4.4.

4.1 TUBE MATERIAL PROPERTIES The tube material properties are provided in Table 4-1 of Reference 3 for 7/8-inch diameter tubes at 650'F. The parameters used in the analysis are the flow stress mean of 68.78 ksi and the flow stress standard deviation of 3.1725 ksi.

Analysis Methods and Data Base for ARC Correlations August 2005 SG-SGDA-05-29 Revision 0

4-2 4.2 BURST CORRELATION The burst pressure, Pb, is normalized to a material with a flow stress of 68.78 ksi, which is the mean of the 7/8-inch tube data appropriate for Sequoyah Unit 2. The correlation parameters are taken from Reference 6.

Table 4-1: Effect of Database Changes on the 7/8" Tube Burst Pressure vs. Bobbin Amplitude Correlation PB = ao + a, log(Volts)

Parameter Addendum 5 Addendum 6 New / Old Database Value Database Value Ratio Intercept, ao 7.4934 7.4801 0.998 Slope, a, -2.3775 -2.4002 1.010 Index of Deter., r2 79.19% 79.67% 1.006 Std. Deviation, rEaor 0.8861 0.8802 0.993 Mean of Log(kV0.2920 0.3111 SS of Log(V) 50.2333 51.6595 N (data pairs) 97 100 Str. Limit (2560 psi) ' 7.67V 7.51V 0.979 Str. Limit (2405 psi) 9.62V 9.40V 0.977 p Value for a1 (2) 1.88-1034 5.60.10-36 Reference af 68.78 ksi (3)

Notes: (1) Values reported correspond to applying a safety factor of 1.4 on the differential pressure associated with a postulated SLB event.

(2) Numerical values are reported only to demonstrate compliance with the requirement that the value be less than 0.05.

(3) This is the flow stress value to which all data were normalized prior to performing the regression analysis. This affects the coefficient and standard error values. The corresponding values for a flow stress of 75.0 ksi can be obtained from the above values by multiplying by 1.0904.

Analysis Methods and Data Base for ARC Correlations August 2005 SG-SGDA-05-29 Revision 0

4-3 4.3 LEAK RATE CORRELATION The leak rate correlation as a function of indication voltage is taken from Reference 6. The steam line break pressure is given as 2405 psi in Reference 2. Therefore the leak correlation for pressure of 2405 psi from Reference 6 is used for the leakage predictions.

The leak rate criterion is given in terms of gallons per minute condensed at room temperature.

Table 4-2: Effect of Added Data on the 7/8" Tubes Leak Rate vs. Bobbin Amplitude Correlation (2560 psi)

Q = 1 0[b+b 4 log(Volts)]

Parameter Addendum 5 Database Value 1 Addendum 6 l Database Value Effect Ratio SLB AP = 2560 psi Intercept, b3 -0.06910 -0.33476 4.84 Slope, b4 0.7170 0.95311 1.33 Index of Determination, r2 7.5% 12.4% 1.66 Residuals, q&,,,, (b5 ) 0.8108 0.8175 1.01 Mean of Log(Q) 0.7221 0.7014 SS of Log(Q) 19.1798 22.8754 :_._-

p Value for b4 7.6% 2.4% 0.32 SLB AP = 2405 psi Intercept, b3 -0.5348 -0.8039 1.50 Slope, b4 0.9699 1.2077 1.25 Index of Determination, r2 14.0% 20.0% 1.43 Residuals, Ocror (bs) 0.7728 0.7774 1.01 Mean of Log(Q) 0.5354 0.5090 SS of Log(Q) 18.7455 22.6667 p Value for b4 2.3% 0.5% 0.22 Common Data Data Pairs, N 29 32 Mean of Log(V) 1.1035 1.0871 SS of Log(V) 2.7841 3.1116 Analysis Methods and Data Base for ARC Correlations August 2005 SG-SGDA-05-29 Revision 0

4-4 4.4 PROBABILITY OF LEAK CORRELATION The probability of leak as a function of indication voltage is taken from Reference 6. In the Monte Carlo analysis leakage is quantified only if the indication is computed to be a leaker, based on the probability of leak correlation.

Table 4-3: Effect of Additional Data on the 7/8" Tube Probability of Leak Correlation Pr(Leak) = 1 +e-[bbi+blog(Vouts)J Addendum 5 Addendum 6 New / Old Parameter Database Value Database Value Ratio Logistic Intercept, bi -5.1017 -5.0407 0.988 Logistic Slope, b2 7.3483 7.5434 1.027 Intercept Variance, VI1 (2) 1.3742 1.3311 0.969 Covariance, V12 -1.7365 -1.7606 1.014 Slope Variance, V22 2.6428 2.7744 1.050 Number of Data, N 115 118 Deviance 30.21 32.37 1.072 Pearson SD 57.9% 61.1% 1.055 MSE 0.267 0.279 1.044 Notes: (1) The parameter estimates in this column were obtained from an analysis performed with the EdF data excluded from consideration.

(2) Parameters Vuare the elements of the covariance matrix of the coefficients, pi, of the regression equation.

4.5 NDE UNCERTAINTIES The NDE uncertainties applied for the EOC-13 and EOC-14 voltage projections are the same as used in the previous 90-day report, Reference 5, and described in Reference 3. The probe wear uncertainty has a standard deviation of 7% about a mean of zero and has a cutoff at 15% based on implementation of the probe wear standard. The analyst variability uncertainty has a standard deviation of 10.3% about a mean of zero with no cutoff. These NDE uncertainty distributions are used in the Monte Carlo analysis to predict the burst probabilities and accident leak rates at EOC-13, and EOC-14. The voltages reported were adjusted to account for differences between the laboratory standard and the standard used in the field.

Analysis Methods and Data Base for ARC Correlations August 2005 SG-SGDA-05-29 Revision 0

4-5 4.6 UPPER VOLTAGE REPAIR LIMIT The upper voltage repair limit is based on the structural limit in Table 4-1 of 7.51 volts for an accident pressure of 2560 psi. It must be reduced by considering the projected voltage growth during the next cycle and NDE uncertainty. The maximum average percentage growth rate for any steam generator is seen from Table 3-7 (SG 3) to be 19% for the 470.9 EFPD Cycle 13, which would project to 19% x (545/470.9) = 22% for the anticipated 545 EFPD Cycle 14.

According to Reference 1, the minimum growth adjustment is 30% per EFPY (44.8% per cycle for the anticipated 545 EFPD Cycle 14). Therefore the specific maximum growth value of 44.8%

and 20% for NDE uncertainty was used to estimate the voltage repair limit. This results in an upper voltage repair limit of 7.51 / (1 + 0.448 + 0.20) = 4.56 volts. No indications equal to or greater than this voltage were left in service.

4.7 PROBE WEAR An alternate probe wear criteria, approved by the NRC (Reference 8), was applied during the EOC-13 inspection. When a probe does not satisfy the 415% voltage variability criteria for wear, this alternate criteria requires that all tubes that have indications above 75% of the repair limit inspected since the last successful probe wear check be reinspected with a good probe. All probes that failed the wear check were immediately replaced with a new probe. In accordance with this alternate probe wear criteria, the whole tube was re-inspected with a good probe when any part of the tube exceeded 75% of the repair limit. As the repair limit for Sequoyah-2 is 2 volts, all tubes that contained worn probe indications above 1.5 volts were re-inspected with a new probe. In the cases where the original call made with the worn probe was greater than 1.5 volts, the signal amplitude obtained with the new probe was used in these analyses.

A total of 11 indications (in 11 tubes) with a bobbin DSI voltage above 1.5 volts were found in the calibration groups that failed the probe wear check (these indications were called as 'RPW'),

and the tubes containing those indications were reinspected with a new probe. Within 4 of these 11 tubes, there were 5 indications with a bobbin DSI voltage below 1.5 volts. These smaller indications retained their 'DSI' designation, and any detected retest signal was designated as

'PBC'.

There was only one false call made with a worn probe. In SG 3, Row 6 Column 48, the worn probe indicated the presence of a 0.44 volt DSI at the H03 support. The retest of that tube with a good probe did not identify an indication at that support. This false call was included in all subsequent analyses, including the burst and leak analyses.

One of the retested intersections had a detectable bobbin signal, but was reclassified, as a non-flaw indication. The HOI support region of tube Row 34 Column 30 in SG 3 was reclassified as a non-flaw 'DSS' call after the retest. This particular intersection was called a DSS in the EOC-12 inspection as well. This intersection was not considered a missed call, but rather a reinterpretted call, and is not included in the burst and leak analyses.

There were no new indications identified during a retest with a new probe, thus there is no evidence that a worn probe missed any indications.

Analysis Methods and Data Base for ARC Correlations August 2005 SG-SGDA-05-29 Revision 0

4-6 Figure 4-1 shows the worn probe voltages plotted against the new probe voltages for all four SGs. One indication had its voltage increase above the repair limit when reinspected with a good probe.

Figure 4-2 shows the voltage measured by the retest of the 4 indications that were less than 1.5 volts measured by the worn probe. The retest voltages closely match the worn probe voltages.

This figure shows that none of the indications measured to be less than 1.5 volts by the worn probe measured over the repair criterion of 2.0 volts on the retest, i.e., no pluggable tubes were missed due to probe wear considerations. This observation supports the criterion that says that these indications did not need retesting.

The indications found in the current inspection that were tested with a worn probe in the previous (2003) inspection were identified. Of the 302 indications found in the current inspection that were tested with a worn probe in the previous inspection, only one was 2 volts or greater (2.01 volts). This indicates that there is no significant effect of probe wear on the population of indications.

As required by Reference 8, the number of new indications detected in the present inspection in tubes that were inspected with a worn probe in the last inspection was also determined. Out of a total of 365 new indications reported in the current inspection, 81 were in tubes inspected with a worn probe during the last inspection. During a recent review of the data from the last inspection, an analyst was able to assign a voltage to all of these 81 indications, which indicates that tubes inspected with worn probes during the last inspection do not contain a disproportionately larger number of new indications. Thus, the requirements specified in Reference 8 for applying the alternate probe wear criteria are met.

Analysis Methods and Data Base for ARC Correlations August 2005 SG-SGDA-05-29 Revision 0

4-7 2.25 2

S 1.75

£ X 1.5 0

1.25 1-1 1.25 1.5 1.75 2 2.25 Volts, Or1a Test, Wom Probe (RPW)

Figure 4-1: Retest Voltage vs. First Test Voltage of Indications Originally Measured to be Greater than 1.5 Volts with Worn Probe Note: This figure does not include the results from tube R34C30, in SG3, at the H01 location. This location had a 1.71 volt original test (RPW) call. When retested with a good probe, it was called as a 1.54 volt DSS (not a DSI).

Analysis Methods and Data Base for ARC Correlations August 2005 SG-SGDA-05-29 Revision 0

4-8 1.5 1.25

& I m

44 0.75 0

> 0.5 0.25 0

0 0.25 0.5 0.75 1 1.25 1.5 Voks, Original Test; Wom Probe (DSI)

Figure 4-2: Retest Voltage vs. First Test Voltage of Indications Originally Measured to be Less than 1.5 Volts in Tubes Retested for Probe Wear Analysis Methods and Data Base for ARC Correlations August 2005 SG-SGDA-05-29 Revision 0

5-1 5.0 CONDITION MONITORING: TUBE LEAK RATE AND BURST PROBABILITIES AT EOC-13 5.1 ANALYSIS APPROACH The measured EOC-13 voltage distributions of Table 3-1 through Table 3-4 for each steam generator are used as the basis for the leak rate and burst probability predictions for EOC-13.

The voltage distributions developed for the computation of POB and leakage consider NDE uncertainty on the measured values, but consider no voltage growth. The resulting voltage distributions used for computation of the probability of burst and leakage are given in Figure 5-1 through Figure 5-4.

Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 August 2005 SG-SGDA-05-29 Revision 0

5-2 45-40 35

10 I.S 20 z

15 5

00000000 -n - - ON4.

-0 Volts Figure 5-1: Voltage Distribution with NDE Uncertainty, SG 1 Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 August 2005 SG-SGDA-05-29 Revision 0

5-3 60 so 40 0

I-

~30 z

20 10 0 ei 't In, r 00 Oq C ei eIn %q t-: c C -q en 0d 0 0 0 0 0 - . - - - 14 e'i e'i Volts Figure 5-2: Voltage Distribution with NDE Uncertainty, SG 2 Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 August 2005 SG-SGDA-05-29 Revision 0

54 60 -

50 40 -

0

.9 20 --

(a z 20 -

10 -

U II -

I N

I

'dt "

TI

'C I

t- 0 I

t o I

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I IIIIE=m .

I I

.O l-I I 00 I

a. N I I I Ne

£ f

M T

-t f

t" I fT C t-h f

0 Volts Figure 5-3: Voltage Distribution with NDE Uncertainty, SG 3 Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 August 2005 SG-SGDA-05-29 Revision 0

5-5 140 120 100 0

80 U I Cdd 0L.

I 60 z

40 20 0

4---

__=.-j______________

-II a - a - a -

II a - a -

I a*--,

I II -.

0 O mm eo en oO ' 't r- 00 0o I - d0 Ii 't} to 00 (K4 I%- a 6 000000006 6 - _ _ - - _

- -_ N r; Vols Figure 5-4: Voltage Distribution with NDE Uncertainty, SG 4 Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 August 2005 SG-SGDA-05-29 Revision 0

5-6 5.2 EOC-13 BURST PROBABILITIES AND LEAK RATES The Monte Carlo analysis results for each of the steam generators based on the measured voltage distribution at EOC-13 are shown in Table 5-1. The analysis program inputs and outputs are detailed in Reference 7. One-quarter-million Monte Carlo trials were performed for each steam generator. The leakage rate is the 95th percentile evaluated at 95% confidence. The burst probability is 95% confidence based on the number of trials.

Table 5-2 presents the predicted results from Reference 5. Since the Reference 5 analysis used Addendum 5 parameters, Table 5-1 includes the results using the Addendum 5 parameters as well.

Table 5-1: Analysis Results for EOC-13 Voltage Distributions with NDE Uncertainty 95/95 Using SLB Number of Maximum Parameters Burst Leak Monte Carlo Number of Volts from Probability Rate, SG Trials Indications Measured Addendum 95% conf. gpm 5 1.90 x 10' 0.0724 1 250,000 294 1.95 1__ 5 6 3.10x10~ 0.0390 5 3.10 x 10-5 0.0769 2 250,000 305 1.97______

6 2.52 x 10-5 0.0422 5 5.26 x 10-5 0.224 3 250,000 412 2.36 1s-5 6 8.76x10- 0.126 5 9.24 x 10- 0.285 4 250,000 836 1.74 4

.6 5.78 x 10 0.147 Table 5-2: Predicted Results 95/95 Using SLB Number of Maximum Parameters Burst Leak Monte Carlo Number of Volts from Probability Rate, SG Trials Indications Predicted Addendum 95% conf. m 1 250,000 410.7 8.6 5 1.52 x 10-3 0.546 2 250,000 416 8.7 5 1.41 x 10- 0.568 3 250,000 505.7 10.4 5 3.09x 10-3 0.985 4 250,000 1210.7 9.0 5 3.92 x 10-' 1.690 Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 August 2005 SG-SGDA.05-29 Revision 0

5-7 5.3 COMPARISON WITH ACCEPTANCE CRITERIA AND PREDICTION All steam generators are well below the burst acceptance criterion of 1.0 x 10.2, and the Sequoyah Unit 2 leakage criterion of 3.7 gpm per steam generator (Reference 2). The acceptance criteria on POB and leakage are satisfied with significant margin.

The predicted values of the probability of burst and leakage were conservative because they were based on a very conservative industry voltage growth rate in Reference 5. The number of indications and maximum voltages were conservatively predicted.

The total number of measured indications for each steam generator was less than the predicted total number of indications. As Figure 3-1 through Figure 34 shows, the quantity of the smaller voltage indications was underestimated but the quantity of larger voltage indications was overestimated. This is attributable to the 0.6 POD (for all indications, regardless of size) that was used to develop the predictions. The larger voltage indications have a greater impact on the leakage prediction values and the burst probability, thus the leakage and burst values were overestimated.

Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 August 2005 SG-SGDA-05-29 Revision 0

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Condition Monitoring: Tube Leak Rate and Burst Probabilities at EOC-13 August 2005 SG-SGDA-05-29 Revision 0

6-1

6.0 OPERATIONALASSESSMENT

TUBE LEAK RATE AND BURST PROBABILITIES AT EOC-14 6.1 ANALYSIS APPROACH The BOC-14 voltage distributions are developed, within the Cyclesim3.1 program, from the measured EOC-13 distribution by considering the POD and the indications that are removed from service. The EOC-14 voltage distribution is developed considering the NDE uncertainties and voltage growth during the cycle. The Cycle 12 growth rate was used in these projections, since it bound the Cycle 13 growth rate. The latest burst and leakage correlations, Reference 6, are used for the EOC-14 predictions. The burst probabilities and leak rates are computed using the computed EOC-14 voltage predictions to address the acceptance criteria at the end of the cycle.

6.2 POD The POD used is the NRC accepted value of 0.6 for all voltages (Reference 1). The beginning of Cycle 14 (BOC-14) voltage distributions are shown in Table 6-1.

Table 6-1: BOC-14 Voltage Distributions BOC-14 Volta e Distributions Volts SG 1 SG 2 SG3 SG 4 0.1 0 0 0 0 0.2 13.33 21.67 15 33.33 0.3 68.33 53.33 59 137.33 0.4 83.33 89 68.33 212.33 0.5 70 95.67 97.33 224 0.6 60 51.67 76.67 193.33 0.7 59 61.67 91.67 158.33 0.8 45 49 72.33 119 0.9 35 25.67 40 110 1 18.33 19 38.33 72.33 1.1 16.67 10.67 31.67 43.33 1.2 11.67 8.33 28.33 30 1.3 3.33 10 21.67 18.33 1.4 0 1.67 13.33 11.67 1.5 1.67 0 10 8.33 1.6 0 3.33 7.33 8.33 1.7 1.67 0 1.67 7.33 1.8 0 0 5 0 1.9 0 0 0 0 2 1.67 0.67 0 0 2.1 0 0 1.33 0 2.2 0 0 0 0 2.3 0 0 0 0 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

6-2 Table 6-1: BOC-14 Voltage Distributions BOC-14 Volta e Distributions Volts SG I SG 2 SG 3 SG 4 2.4 0 0 0.67 0 2.5 0 0 0 0 Total 489 501.3 679.7 1387.3 6.3 VOLTAGE GROWTH RATES FOR CYCLE 14 The Cycle 12 and Cycle 13 bounding voltage growth rates, shown in Figure 3-15 and Figure 3-16, indicate that the Cycle 12 growth rate is the more conservative. The Cycle 12 growth rate is used in these projections.

6.4 PREDICTION OF VOLTAGE DISTRIBUTIONS AT EOC-14 The prediction of the EOC-14 voltage distributions is based on the BOC-14 indications and the composite growth rate. The length of Cycle 14 is established at 545 effective full power days (EFPD), Reference 2. The EOC-14 predicted voltage distributions (using both the Cycle 12 and Cycle 13 growth rates) are shown in Table 6-2 and in Figure 6-1 through Figure 6-4. The voltage distributions predicted using both growth rates are similar, with the predictions using the Cycle 13 growth rates populated with somewhat greater frequency in the lower voltages and with higher tail-end voltages. The analysis inputs and outputs are detailed in Reference 7.

Table 6-2: EOC-14 Voltage Distributions EOC-14 Voltage Distributions Volts SG 1 SG 2 SG 3 SG 4 0.1 0.17 0.28 0.19 0.43 0.2 4.79 6.29 4.92 11.11 0.3 19.98 19.06 17.92 43.4 0.4 37.39 37.83 34.19 88.81 0.5 51.95 55.37 52.3 134.58 0.6 59.57 63.96 66.57 163.78 0.7 59.13 63.33 72.95 168.95 0.8 55.24 57.8 73.45 158.74 0.9 48.52 49.26 67.56 140.03 1 40.03 39.34 58.17 117.28 1.1 31.33 29.77 48.53 93.56 1.2 23.37 21.72 39.88 71.2 1.3 16.71 15.58 32.53 52.24 1.4 11.59 11.16 26.18 37.78 1.5 7.91 8.02 20.73 27.46 1.6 5.23 5.7 15.94 19.99 1.7 3.5 4.02 12.08 14.53 1.8 2.53 2.85 9 10.64 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

6-3 Table 6-2: EOC-14 Voltage Distributions EOC-14 Voltage Distributions Volts SG1 SG2 SG3 SG4 1.9 1.88 2.12 6.56 7.7 2 1.4 1.5 4.69 5.45 2.1 1.07 1.06 3.31 3.8 2.2 0.95 0.83 2.45 2.79 2.3 0.83 0.73 1.82 2.2 2.4 0.65 0.61 1.39 1.73 2.5 0.48 0.44 1.06 1.3 2.6 0.36 0.32 0.83 0.96 2.7 0.27 0.24 0.63 0.7 2.8 0.19 0.17 0.45 0.52 2.9 0.13 0.11 0.32 0.37 3 0.08 0.07 0.24 0.25 3.1 0.06 0.05 0.17 0.17 3.2 0.03 0.03 0.13 0.11 3.3 0.02 0.02 0.09 0.07 3.4 0.01 0.01 0.06 0.05 3.5 0.01 0.01 0.04 0.03 3.6 0 0.01 0.03 0.02 3.7 0 0 0.02 0.01 3.8 0 0 0.01 0.01 3.9 0 0 0.01 0 4 0 0 0 0 4.1 0 0 0 0 4.2 0 0 0 0 4.3 0 0 0 0 4.4 0 0 0 0 4.5 0 0 0 0 4.6 0 0 0 0 4.7 0 0 0 0 4.8 0 0 0 0 4.9 0 0 0 0 5 0 0 0 0 5.1 0 0 0 0 5.2 0 0 0 0 5.3 0 0 0 0 5.4 0 0 0 0 5.5 0 0 0 0 5.6 0 0 0 0 5.7 0 0 0 0 5.8 0 0 0 0 5.9 0 0 0 0 6 0 0 0 0 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

64 Table 6-2: EOC-14 Voltage Distributions EOC-14 Voltage Distributions Volts SGI SG2 SG3 SG4 6.1 0 0 0 0 6.2 0 0 0 0 6.3 0 0 0 0 6.4 0 0 0 0 6.5 0 0 0 0 6.6 0 0 0 0 6.7 0 0 0 0 6.8 0 0 0 0 6.9 0 0 0 0 7 0 0 0 0 7.1 0 0 0 0 7.2 0 0 0 0 7.3 0 0 0 0 7.4 0 0 0 0 7.5 0 0 0 0 7.6 0 0 0 0 7.7 0 0 0 0 7.8 0 0 0 0 7.9 0 0 0 0 8 0 0 0 0 8.1 0 0 0 0 8.2 0 0 0 0 8.3 0 0 0 0 8.4 0 0 0 0 8.5 0 0 0 0 8.6 0 0 0 0 8.7 0.05 0.07 0.06 0.13 8.8 0.21 0.18 0.18 0.44 8.9 0.26 0.28 0.24 0.67 9 0.09 0.13 0.29 0.71 9.1 0 0 0.28 0.63 9.2 0.7 0.7 0.2 0.52 9.3 0 0 0 0.41 9.4 0 0 0 0.07 9.5 0.3 0.3 0.7 0 9.6 0 0 0 0.7 9.7 0 0 0 0 9.8 0 0 0.3 0.3 9.9 0 0 0 0 Total 489 501.3 679.7 1387.3 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

6-5 80 70 60 2 50 0

U 40 S.

z 30 20 10 0 A I I lLa 1 lTT% II I I I iI I I VI . I I i r I v TT T aITI TT T T1I TI [TTT I I I II I I I TT IT I rT I I T1 I T I I T I. r I I I IrT I~ I IT I I I tn N en t - 't 0% n tr - tn 0% e r - In 0% M r O f WI a en r- t Volts Figure 6-1: Predicted Voltage Distribution, SG 1 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

6-6 80 70 60 20 50

4. 0 z 30 20 Ll'll.

111 10 4-11 1 11IIIfff gild 11111.

0 _v I-I4 11111hl".-ini RE I Inl I

U I

H._, aHnH

H, E I flUwH f.. ,-, . . .-

_; C 0 e ro 't O F t% in CS e - tf CS - _ CS 0en Ven t-s _: _; Cl Cl Cl r' st4 tA vi % %6 .10 tZ t- 0 00 00 X; 08C Vols Figure 6-2: Predicted Voltage Distribution, SG 2 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

6-7 80 70 60 2 50 4

0 40 Z30 20 10 0

_ mn 0% r -e a " 0%

n eI t -

In m 0% M r.

to - It 0% M -_

_r Ch t-O O O _- -4 4 4 e> el; el; St At 4 In a \D \D \ t-: t-: 00 00 00 0;(h Vohs Figure 6-3: Predicted Voltage Distribution, SG 3 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

6-8 180 160 140 120 0

100 Id-10 80 z

60 40 20 0

en 0o M t- -

1111111I IIIII m oM M e- - qn ON en K- -_

jl 0m o r- - t_ 0m en t-

0) o _; _: Cft- a c ts Volt Figure 6-4: Predicted Voltage Distribution, SG 4 Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

6-9 6.5 PREDICTION OF TUBE LEAK RATES AND BURST PROBABILITIES AT EOC-14 The Monte Carlo analysis results for predicted EOC-14 voltage distributions are shown in Table 6-3. One-quarter-million Monte Carlo trials were performed for each steam generator in this operational assessment. The Cycle 12 growth rate was used for these predictions. The leakage rate is the 95th percentile evaluated at 95% confidence. The burst probability is 95% confidence based on the number of trials. The analysis program inputs and outputs are detailed in Reference 7.

Table 6-3: EOC-14 Predicted Results Burst Probability 95/95 SLB Number of Monte Number of Maximum 95% Leak Rate SG Carlo Trials Indications Volts* Confidence gpEm) 1 250,000 489.0 9.5 2.20 X I0--' 0.519 2 250,000 501.3 9.5 2.47 X I0O- 0.530 3 250,000 679.7 9.8 3.41 X I0O- 0.874 4 250,000 1387.3 9.8 6.51 X I0O3 1.47

Voltage where tail is accumulated to 0.3 indications 6.6 COMPARISON WITH ACCEPTANCE CRITERIA All steam generators are below the burst acceptance criterion of 1.0 x 10.2, and the Sequoyah Unit 2 leakage criterion of 3.7 gpm (Reference 2).

Operational Assessment: Tube Leak Rate and Burst Probabilities at EOC-14 August 2005 SG-SGDA-05-29 Revision 0

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7-1

7.0 REFERENCES

1. NRC Generic Letter 95-05, "Voltage-Based Repair Criteria for Westinghouse Steam Generator Tubes Affected by Outside Diameter Stress Corrosion Cracking," USNRC Office of Nuclear Reactor Regulation, August 3, 1995.

2. TVA Letter, H.R. Rogers to M.H. Cothron, "Sequoyah Nuclear Plant -U2C13 Steam Generator Tube Integrity Inspection," B38 050506 802, May 6, 2005.

3. WCAP-14277, Revision 1, "SLB Leak Rate and Tube Burst Probability Analysis Methods for ODSCC at TSP Intersections," Westinghouse Nuclear Services Division, December 1996.

4. WCAP-13990, "Sequoyah Units 1 and 2 Steam Generator Tube Plugging Criteria for Indications at Tube Support Plates," May 1994 - Section 4.1 - Refers to WCAP-12871, "J.M.

Farley Units 1 and 2 SG Tube Plugging Criteria for ODSCC at Tube Support Plates,"

Revision 2, February 1992.

5. Westinghouse Report SG-SGDA-03-55, Rev.0, "Condition Monitoring and Operational Assessment: GL 95-05 Alternate Repair Criterion End of Cycle 12, 90 Day Report, Sequoyah Unit 2," February 2004.

6. EPRI Report NP-7480-L, Addendum 6, 2004 Database Update, "Steam Generator Tubing Outside Diameter Stress Corrosion Cracking at Tube Support Plates Database for Alternate Repair Limits," October 2004.

7. Westinghouse Calculation CN-CDME-05-19, Rev. 0, "Sequoyah Unit 2 EOC 13 GL 95-05 Analyses," August 2005.

8. Letter from B.W. Sheron, Nuclear Regulatory Commission, to A. Marion, Nuclear Energy Research Institute, February 9, 1996.

9. Letter from A. Marion, Nuclear Energy Research Institute, to B. Sheron, Nuclear Regulatory Commission, "Refining the Leak Rate Sampling Methodology for ODSCC ARC Applications (Generic Letter 95-05)," March 15, 2002.

10. Letter from W. Bateman, Nuclear Regulatory Commission, to A. Marion, Nuclear Energy Research Institute, "Refining the Leak Rate Sampling Methodology for Generic Letter 95-05 Voltage-Based Alternate Repair Criteria Application," March 27, 2002.

11. Westinghouse Letter LTR-SGDA-03-204, "Instructions for Running the Computer Code Cyclesim3.1 ," R. Keating, Westinghouse Nuclear Services Division, August 30, 2003.

References August 2005 SG-SGDA-05-29 Revision 0

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A-i Appendix A Indication List Sequoyah Unit 2 GL-95-05 End of Cycle 13 Sorted by EOC-13 Voltage Steam Generator 1)

Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts("

3 16 DSI H02 1.95 1.6 28 43 DSI H02 1.66 1.68 29 52 DSI H02 1.47 1.05 32 68 DSI H1-01 1.3 1.21 41 37 DSI H02 1.23 0.97 9 92 DSI 1101 1.16 1.04 17 33 DSI H02 1.16 1.1 35 42 DSI H02 1.16 0.82 35 22 DSI H03 1.14 0.96 12 3 DSI H05 1.11 DSS 19 45 DSI H02 1.11 0.62 27 52 DSI 1101 1.11 1.49 22 48 DSI 1101 1.1 1.17 45 51 DSI H02 1.1 1.1 23 7 DSI H1101 1.09 0.89 37 61 DSI H02 1.08 1.12 39 46 DSI H01 1.08 0.81 24 21 DSI H02 1.07 0.69 5 46 DSI H1-01 1.03 0.63 6 19 DSI H03 1.02 0.55 15 31 DSI 1101 1.01 0.96 32 74 DSI H03 1.01 0.71 6 2 DSI H02 1 0.86 25 38 DSI H02 0.99 0.94 4 6 DSI H02 0.98 0.67 44 45 DSI H02 0.98 0.61 3 46 DSI HO 0.97 0.74 3 70 DSI H04 0.97 1.03 10 3 DSI H06 0.97 DSS 15 18 DSI H01 0.96 0.95 27 48 DSI H02 0.95 1.11 40 25 DSI H02 0.92 0.48 19 51 DSI 1101 0.91 0.83 8 3 DSI H02 0.9 0.64 22 25 DSI H01 0.9 0.62 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-2 Steam Generator 1(3)

Row Col Ind Elev Plugged"') EOC-13 Volts EOC-12 Volts()

9 25 DSI H02 0.89 0.42 9 30 DSI H02 0.89 0.54 9 34 DSI H04 0.89 0.34 26 64 DSI HO1 0.89 0.57 30 82 DSI H02 0.89 0.9 3 15 DSI H05 0.87 0.75 25 42 DSI H02 0.87 0.46 13 9 DSI HO1 0.84 0.57 17 4 DSI HO1 0.84 0.53 32 42 DSI H02 0.84 0.42 40 25 DSI 1101 0.84 0.48 17 4 DSI H03 0.83 0.78 5 26 DSI H02 0.82 0.35 11 58 DSI H02 0.82 0.92 14 5 DSI HO1 0.82 0.33 28 45 DSI H02 0.82 0.98 40 24 DSI H02 0.82 0.71 8 12 DSI 1101 0.81 0.84 33 50 DSI H02 0.81 0.9 8 3 DSI H03 0.8 0.39 3 25 DSI H02 0.78 0.83 4 15 DSI HO1 0.78 0.53 5 32 DSI HO1 0.78 0.54 5 54 DSI H03 0.78 0.64 6 21 DSI HO1 0.78 0.69 6 91 DSI H02 0.78 0.91 10 37 DSI HO1 0.78 0.34 28 28 DSI H04 0.78 0.48 35 22 DSI HO1 0.78 0.57 35 23 DSI HO1 0.78 0.74 20 65 DSI H02 0.77 0.92 35 17 DSI H02 0.77 0.71 35 30 DSI HO1 0.77 0.7 11 3 DSI H06 0.76 DSS 14 5 DSI H02 0.76 0.8 18 89 DSI H05 0.76 0.54 22 9 DSI HO1 0.76 0.4 32 53 DSI HO1 0.76 0.54 37 40 DSI HO1 0.76 0.5 12 46 DSI H02 0.75 0.74 21 8 DSI H10 0.74 0.75 46 41 DSI H03 0.74 0.58 19 66 DSI HO1 0.73 0.72 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-3 Steam Generator 1)

Row Col Ind Elev lPlugged(') EOC-13 Volts EOC-12 Volts(,)

42 40 DSI H02 0.73 0.66 16 29 DSI H02 0.72 0.91 28 12 DSI HO 0.72 0.47 3 34 DSI HO 0.7 0.6 24 34 DSI H01 0.7 0.69 38 63 DSI H02 0.7 0.69 10 34 DSI 1101 0.69 0.46 40 25 DSI H04 0.69 0.35 4 7 DSI 1101 0.68 0.63 11 93 DSI H02 0.68 0.42 21 8 DSI H02 0.68 0.82 32 59 DSIT H03 0.68 0.46 42 49 DSI H02 0.68 0.42 9 43 DSI H03 0.67 0.55 32 53 DSI H03 0.67 0.54 35 33 DSI H02 0.67 0.38 6 4 DSI HO 0.66 0.53 6 26 DSI 1101 0.66 0.31 17 20 DSI 1101 0.66 0.61 45 47 DSI H04 0.66 0.79 25 37 DSI 1101 0.65 0.53 29 56 DSI H03 0.65 0.47 2 8 DSI H02 0.64 0.44 32 42 DSI H01 0.64 0.71 32 73 DSI H02 0.63 0.62 36 62 DSI H02 0.63 0.69 40 26 DSI H04 0.63 0.57 38 65 DSI H04 0.62 0.77 40 51 DSI H03 0.62 0.89 9 39 DSI H01 0.61 0.84 10 36 DSI HO Y 0.61 0.44 10 77 DSI HO 0.61 0.46 10 77 DSI H02 0.61 0.45 10 77 DSI H04 0.61 1.31 24 29 DSI 1101 0.61 0.76 28 10 DSI H02 0.61 0.43 28 50 DSI H02 0.61 0.45 30 41 DSI H02 0.61 0.74 44 50 DSI H02 0.61 0.35 3 46 DSI H02 0.6 0.15 3 52 DSI 101 0.6 0.53 18 57 DSI H01 0.6 0.28 28 77 DSI 102 0.59 0.47 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-4 Steam Generator 1(3)

Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts 2 32 44 DSI H04 l 0.59 0.39 36 62 DSI H03 0.59 0.53 10 75 DSI H02 0.58 0.48 10 75 DSI H06 0.58 0.54 21 78 DSI H02 0.58 0.57 24 29 DSI H02 0.58 0.64 30 82 DSI HO1 0.58 0.5 32 48 DSI H02 0.58 0.5 36 35 DSI H04 0.58 0.47 44 42 DSI H02 0.58 0.67 3 16 DSI HO1 0.57 0.52 24 17 DSI H02 0.57 0.64 35 32 DSI HO 0.57 0.34 39 30 DSI H05 0.57 0.3 16 86 DSI H04 0.56 0.54 24 46 DSI HO 0.56 0.81 26 30 DSI H02 0.56 0.49 40 24 DSI HO 0.56 0.48 45 39 DSI HO 0.56 0.59 25 25 DSI HO 0.55 0.39 28 11 DSI H01 0.55 0.27 21 7 DSI HO 0.54 0.57 22 28 DSI H01 0.54 0.5 22 33 DSI H02 0.54 0.57 24 21 DSI HO H01 0.54 0.56 25 8 DSI H01 0.54 0.43 4 11 DSI H01 0.53 0.42 27 48 DSI HO1 0.53 0.48 22 19 DSI H01 0.52 0.22 31 19 DSI H03 0.52 0.55 2 12 DSI H02 0.51 0.44 28 46 DSI H02 0.51 0.5 2 10 DSI H01 0.5 0.42 12 3 DSI H06 0.5 DSS 5 7 DSI H02 0.49 0.52 5 33 DSI H01 0.49 0.35 23 11 DSI H02 0.49 0.59 15 5 DSI H02 0.48 0.27 17 4 DSI H06 0.48 0.43 17 16 DSI H01 0.48 0.36 17 24 DSI H01 0.48 0.69 22 11 DSI H03 0.48 0.35 23 20 DSI H02 0.48 0.42 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-5 Steam Generator 1(3)

Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Voltsz) 30 24 DSI H06 0.48 0.46 27 31 DSI H03 0.47 0.55 35 19 DSI H03 0.47 0.42 35 30 DSI H02 0.47 0.62 38 46 DSI H04 0.47 0.36 4 9 DSI H03 _ 0.46 0.4 5 35 DSI HO1 0.46 0.65 9 28 DSI H04 0.46 0.51 24 60 DSI HO1 0.46 0.82 6 15 DSI H02 0.45 0.32 33 75 DSI H05 0.45 0.54 37 61 DSI H03 0.45 0.29 45 37 DSI H02 0.45 0.67 3 47 DSI H02 _ 0.44 0.27 21 83 DSI H02 0.44 0.34 40 26 DSI HOS 0.44 0.42 44 40 DSI H02 0.44 0.58 3 27 DSI HO1 0.43 0.34 5 72 DSI H02 0.43 0.53 5 80 DSI H02 0.43 0.39 13 62 DSI H05 0.43 0.37 20 9 DSI H02 0.43 0.21 28 31 DSI H02 0.43 0.43 5 26 DSI HO1 0.42 0.23 11 4 DSI H06 0.42 0.35 27 18 DSI H02 0.42 0.24 35 21 DSI H02 0.42 0.47 45 47 DSI H02 0.42 0.38 45 49 DSI H02 0.42 0.9 4 78 DSI H02 0.41 0.29 24 22 DSI HO1 0.41 0.38 11 61 DSI H02 0.4 0.62 18 8 DSI H02 0.4 0.57 31 64 DSI H03 0.4 0.36 34 28 DSI HO1 0.4 0.34 28 16 DSI HO1 0.39 0.32 35 47 DSI H02 0.39 0.37 5 13 DSI H02 0.38 0.22 19 45 DSI HO1 0.38 0.58 25 77 DSI H02 0.38 0.42 35 33 DSI H03 0.38 0.45 5 11 DSI HO1 0.37 0.33 5 43 DSI H02 0.37 0.42 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-6 Steam Generator 1(3)

Row Col Ind Elev Plugged"') EOC-13 Volts EOC-12 Volts~z) 6 2 DSI H03 0.37 0.74 16 30 DSI HO1 0.37 0.25 29 50 DSI H02 0.37 0.26 38 65 DSI H02 0.37 0.41 40 27 DSI H02 0.37 0.25 11 3 DSI H05 0.36 DSS 20 67 DSI HO1 0.36 0.3 33 72 DSI H02 0.36 0.41 38 24 DSI H02 0.36 0.26 3 42 DSI H01 0.35 0.23 14 4 DSI H01 0.35 0.33 23 9 DSI H02 0.35 0.23 33 67 DSI H04 0.35 0.5 17 4 DSI H04 0.34 0.31 19 8 DSI H02 0.34 0.64 3 47 DSI HO1 0.33 0.33 6 54 DSI H02 0.33 0.53 21 73 DSI HOI 0.33 0.44 35 21 DSI H01 0.33 0.36 36 54 DSI H02 0.33 0.3 37 32 DSI H05 0.33 0.31 38 64 DSI H03 0.33 0.5 6 27 DSI H02 0.32 0.13 19 8 DSI H05 0.32 0.44 20 32 DSI H01 0.32 0.17 25 32 DSI HO1 0.32 0.19 27 16 DSI H02 0.32 0.25 33 27 DSI H04 0.32 0.5 36 42 DSI H02 0.32 0.29 39 27 DSI H04 0.32 0.31 42 40 DSI H07 0.32 0.25 5 7 DSI HO1 0.31 0.24 6 9 DSI H01 0.31 0.12 6 24 DSI H01 0.31 0.26 6 29 DSI H01 0.31 0.27 6 45 DSI HO1 0.31 0.31 12 3 DSI HO1 0.31 0.44 12 5 DSI H06 0.31 DSS 3 20 DSI H02 0.3 0.28 12 6 DSI H04 0.3 0.35 19 77 DSI H03 0.3 0.35 22 21 DSI HOI 0.3 0.46 40 26 DSI HO1 0.3 0.26 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-7 Steam Generator 1)

Row Col Ind Elev Plugged"') EOC-13 Volts EOC-12 Volts) 8 33 DSI HO1 0.29 0.23 34 30 DSI H03 0.29 0.31 35 30 DSI H03 0.29 0.5 36 47 DSI H02 0.29 0.27 5 50 DSI H02 0.28 0.17 6 35 DSI HO1 0.28 0.17 9 32 DSI HO1 0.28 0.25 22 46 DSI H04 0.28 0.45 24 9 DSI HO1 0.28 0.32 30 62 DSI H02 0.28 0.39 35 21 DSI H04 . 0.28 0.23 35 32 DSI H03 0.28 0.17 5 51 DSI HO1 0.27 INR 19 74 DSI H02 0.27 0.28 23 32 DSI H04 . 0.27 0.26 27 24 DSI H02 0.27 0.28 33 42 DSI H02 0.27 0.2 22 10 DSI H02 0.26 0.59 27 18 DSI HOI 0.26 0.18 35 22 DSI H02 0.26 0.35 13 62 DSI H06 0.25 0.32 17 4 DSI H02 0.25 0.22 24 15 DSI H01 0.25. 0.19 25 14 DSI H02 0.25 0.15 31 33 DSI H02 0.25 0.24 42 40 DSI HOI 0.25 0.28 17 82 DSI H05 0.24 0.28 26 20 DSI H02 . 0.24 0.26 28 26 DSI H02 0.24 0.29 8 21 DSI H04 0.23 0.26 12 44 DSI H02 0.23 0.18 22 31 DSI H01 0.23 0.22 23 9 DSI HOI 0.23 0.24 38 51 DSI H02 0.23 0.33 28 27 DSI H02 0.21 0.42 28 28 DSI H06 0.21 0.21 6 38 DSI H01 0.2 0.14 17 21 DSI H02 0.19 0.16 20 58 DSI 1101 0.19 0.38 15 14 DSI H03 0.18 0.11 22 68 DSI H02 0.18 0.21 18 82 DSI H02 0.16 0.24 28 79 DSI HO 0.16 0.29 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-8 Steam Generator V)

Row I Col Ind I Elev I Plugged(') l EOC-13 Volts I EOC-12 Volts(Z) 37 160 1DSI IH05 I10.14 10.62 (1) All indications greater than or equal to 2 volts at EOC-13 were subject to a Plus Point inspection. All DSI indications greater than 2 volts, confirmed by Plus Point inspection, were repaired by plugging.

(2) Indications without an EOC-12 Volts value were not used in the determination of growth rate.

DSS = Distorted Support Signal. Doesn't meet calling criteria for a DSI.

INR = Indication Not Reportable.

(3) The table for SG I does not include Row 4 Column 14 at the H02 elevation. This TSP intersection did not have a DSI indication at EOC-13, but it did have a 0.25 Volt SAI by MRPC. A reliable estimation of the DSI voltage cannot be made due to this intersection having a 2.51 Volt DNT call. Row 4 Column 14 was plugged. This intersection did not have a reportable DSI or SAI call at the EOC-12 inspection, but did have a 2.59 Volt DNT call.

Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-9 Steam Generator 2 Row Col Ind Elev Plugged"') EOC-13 Volts EOC-12 Volts1 2z 33 25 DSI H02 y 1.97 0.57 30 74 DSI H02 1.62 1.38 3 42 DSI H02 1.57 1.57 44 52 DSI H02 1.39 1.22 27 68 DSI HO1 1.28 0.88 3 61 DSI H02 1.24 1.33 15 89 DSI HOl 1.23 1.25 30 54 DSI HO1 1.23 1.17 30 68 DSI H02 1.23 DSS 33 31 DSI H02 1.22 0.82 23 49 DSI HO1 1.2 1.42 38 45 DSI H02 1.15 0.78 11 65 DSI H02 1.13 1.11 24 37 DSI H04 1.12 1.18 41 41 DSI H04 1.12 INR 26 59 DSI HOI 1.07 0.59 32 20 DSI HO1 1.07 1.15 2 58 DSI H02 1.06 1.36 30 81 DSI HOl 1.05 0.82 41 43 DSI H02 1.04 0.65 36 71 DSI HOl 1.03 1.09 14 48 DSI H02 y 1.01 0.96 8 92 DSI HOl y 1 0.93 38 49 DSI H02 0.99 0.69 27 84 DSI HOI 0.97 0.93 3 76 DSI H02 0.95 0.49 2 45 DSI H02 0.94 0.94 8 44 DSI HO1 0.94 1.01 31 70 DSI HO1 0.94 1.26 32 20 DSI H02 0.94 0.86 37 20 DSI HO1 0.94 0.75 3 37 DSI H02 0.93 1.19 30 55 DSI HO1 0.93 1.15 2 82 DSI H04 0.92 0.7 11 63 DSI H02 0.9 0.42 27 53 DSI H02 0.9 0.68 41 50 DSI H02 0.9 0.5 9 33 DSI HO1 0.89 0.91 15 49 DSI H02 0.89 0.42 19 69 DSI HO1 0.89 0.74 24 43 DSI H02 0.89 0.81 42 61 DSI HO1 0.89 0.49 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-10 Steam Generator 2 Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts(7 29 16 DSI HO1 0.88 0.73 4 56 DSI H02 0.86 1.01 2 85 DSI HO1 0.85 0.8 14 48 DSI HO y 0.84 0.98 24 87 DSI HO1 0.84 0.71 36 42 DSI H02 0.82 0.74 30 81 DSI H04 _ 0.81 0.59 30 83 DSI HO1 0.81 0.74 15 36 DSI HO1 0.79 0.67 15 54 DSI H02 y 0.78 0.73 28 17 DSI H02 0.78 0.58 2 76 DSI H02 0.77 .0.61 4 26 DSI H02 0.77 0.89 10 4 DSI H02 0.77 0.48 27 84 DSI H02 0.77 0.65 2 94 DSI H02 0.76 0.33 30 79 DSI H02 0.76 0.56 38 45 DSI H03 0.76 0.55 41 55 DSI H03 0.75 0.59 5 93 DSI HO1 0.74 0.26 7 44 DSI HO1 0.73 1.05 12 44 DSI H02 0.73 0.6 18 56 DSI H02 0.73 0.61 22 58 DSI HOl 0.73 0.55 32 61 DSI H02 0.73 0.72 36 75 DSI H02 0.73 0.81 2 58 DSI HOI 0.72 0.75 4 54 DSI H02 0.72 0.59 8 38 DSI H02 0.72 0.48 11 88 DSI H02 0.72 0.46 25 56 DSI H03 0.72 0.7 39 55 DSI H02 0.72 0.73 6 39 DSI H02 0.71 0.23 14 84 DSI HO1 0.71 0.82 23 44 DSI HO1 0.71 0.69 30 22 DSI H02 0.71 1.16 32 17 DSI H05 0.71 1.11 41 54 DSI H02 0.71 0.51 20 58 DSI HO1 0.7 0.56 24 37 DSI H02 0.7 0.77 8 51 DSI H01 0.69 0.51 20 56 DSI H02 0.69 0.71 31 67 DSI H02 0.69 0.6 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-11 Steam Generator 2 Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 VoltS(7) 43 52 DSI HO1 0.69 0.43 2 87 DSI HO1 0.68 0.72 21 61 DSI HO1 0.68 0.35 2 73 DSI H02 0.67 0.54 6 38 DSI H02 0.67 0.84 7 4 DSI H02 0.67 0.88 40 40 DSI H03 0.67 0.72 2 43 DSI H02 0.66 0.66 2 83 DSI H101 0.66 0.62 2 85 DSI H02 0.66 0.55 5 94 DSI HO 0.66 0.6 7 4 DSI HO1 0.66 0.35 3 72 DSI HO 0.65 0.42 4 36 DSI HO1 0.65 1.16 23 85 DSI H02 0.65 0.49 29 21 DSI H02 0.65 0.41 45 51 DSI H02 0.65 0.81 2 88 DSI HO1 0.64 0.56 4 27 DSI H02 0.64 0.42 7 43 DSI H02 0.64 0.8 41 43 DSI H03 0.64 0.58 45 52 DSI H02 0.64 0.59 31 47 DSI H02 0.63 0.63 43 38 DSI H02 0.63 0.65 2 73 DSI HOl 0.62 0.47 20 43 DSI H05 0.62 0.64 24 60 DSI H02 0.62 0.74 2 14 DSI H02 0.61 0.53 2 37 DSI H02 0.61 0.21 4 61 DSI H04 0.61 0.35 8 61 DSI H02 0.61 0.48 29 16 DSI H02 0.61 0.83 4 50 DSI HOI 0.6 0.65 4 94 DSI H02 0.6 0.36 11 21 DSI HO1 0.6 0.65 29 67 DSI HO1 0.6 0.78 43 43 DSI H02 0.6 0.39 8 51 DSI H02 0.59 0.45 28 79 DSI H02 0.59 0.65 43 44 DSI H03 0.59 0.4 5 65 DSI HO1 0.58 0.45 6 68 DSI H06 0.58 0.39 8 45 DSI H02 0.58 0.38 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-12 Steam Generator 2 Row Col Ind Elev Plugged"') EOC-13 Volts EOC-12 Volts(z) 41 50 DSI HO1 0.58 0.62 42 37 DSI H05 0.58 0.43 4 92 DSI H05 0.57 0.94 8 47 DSI H02 0.57 0.34 36 74 DSI H02 0.57 0.82 6 1 DSI H02 0.56 0.37 17 41 DSI HOI 0.55 0.39 23 55 DSI HO1 0.55 0.29 30 77 DSI H02 0.55 0.53 6 84 DSI H02 0.54 0.5 18 22 DSI HOI 0.54 0.7 31 48 DSI HO1 0.54 0.42 31 66 DSI H02 0.54 0.5 20 49 DSI H02 0.52 0.28 36 64 DSI HO1 0.52 1.05 4 64 DSI HO1_ 0.51 0.49 6 94 DSI HO1 0.51 0.45 11 57 DSI HO1 0.51 0.35 23 22 DSI H02 0.51 0.63 41 54 DSI H03 0.51 0.39 28 66 DSI H03 0.5 0.44 29 20 DSI H02 0.5 0.82 31 74 DSI H02 0.5 0.6 2 50 DSI H02 0.49 0.53 5 92 DSI HO 0.49 0.5 6 16 DSI H02 0.49 0.26 8 11 DSI H02 0.49 0.19 12 6 DSI H02 0.49 0.59 45 54 DSI H02 0.49 0.44 2 84 DSI HO 0.48 0.41 2 88 DSI H03 0.48 0.59 20 52 DSI HO 0.48 0.48 28 69 DSI H02 0.48 0.59 30 16 DSI H02 0.48 0.68 41 69 DSI HO1 0.48 0.32 42 50 DSI H02 0.48 0.37 45 39 DSI H04 0.48 0.26 6 40 DSI HOI 0.47 0.54 9 72 DSI H02 0.47 0.37 12 90 DSI H02 0.47 0.33 22 69 DSI H1101 0.47 0.38 27 68 DSI H02 0.47 0.45 32 23 DSI H02 0.47 0.35 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-13 Steam Generator 2 Row Col Ind Elev Plugged') EOC-13 Volts EOC-12 Volts(2) 39 58 DSI H04 0.47 0.61 39 62 DSI H02 0.47 0.31 2 55 DSI H02 0.46 0.6 25 72 DSI H02 0.46 0.51 35 45 DSI H02 _ 0.46 0.41 3 72 DSI H03 0.45 0.68 20 62 DSI HOI 0.45 0.38 39 25 DSI H01 0.45 0.23 20 49 DSI H101 0.44 0.37 23 44 DSI H05 0.44 0.35 24 38 DSI H02 0.44 0.42 30 19 DSI H04 0.44 0.15 37 55 DSI H02 0.44 0.5 3 49 DSI H102 0.43 0.54 13 68 DSI HOI 0.43 0.89 20 10 DSI H03 0.43 0.18 26 59 DSI H02 0.43 0.33 33 25 DSI HO Y 0.43 0.47 4 92 DSI H03 0.42 0.73 8 90 DSI H02 0.42 0.3 16 48 DSI H05 0.42 0.29 20 57 DSI H01 0.42 0.41 23 17 DSI H02 0.42 0.58 24 87 DSI H04 0.42 0.3 31 70 DSI H02 0.42 1.14 38 25 DSI H02 0.42 0.39 38 33 DSI H03 0.42 0.32 3 5 DSI H02 0.41 0.42 8 70 DSI H03 0.41 0.34 8 91 DSI 1101 0.41 0.42 9 57 DSI H02 0.41 0.66 15 32 DSI H04 0.41 0.53 19 22 DSI H02 0.41 0.29 35 44 DSI H02 0.41 0.33 40 29 DSI H02 0.41 0.45 25 22 DSI H02 0.4 0.46 38 59 DSI H02 0.4 0.36 40 37 DSI H02 0.4 0.33 9 48 DSI H02 0.39 0.63 15 87 DSI H02 0.39 0.3 21 64 DSI 1101 0.39 0.29 30 82 DSI H02 0.39 0.66 31 67 DSI H03 0.39 0.25 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-14 Steam Generator 2 Row Col Ind Elev Plugged't)' EOC-13 Volts EOC-12 Volts~z) 42 43 DSI H03 0.39 0.37 10 31 DSI H04 0.38 0.42 10 89 DSI H02 0.38 0.52 12 59 DSI H02 0.38 0.35 14 90 DSI HO 0.38 0.35 19 22 DSI HO 0.38 0.52 22 37 DSI H05 0.38 0.3 39 59 DSI H02 0.38 0.41 31 38 DSI H04 0.37 0.36 33 25 DSI H04 y 0.37 0.41 7 21 DSI HO 0.36 0.34 20 22 DSI H03 0.36 0.27 41 54 DSI HO 0.36 0.36 3 5 DSI H04 0.35 0.24 20 44 DSI H02 0.35 0.31 31 25 DSI H02 0.35 0.55 37 66 DSI HO 0.35 0.32 38 53 DSI H02 0.35 0.25 7 13 DSI H02 0.34 0.35 16 33 DSI H03 0.34 0.42 26 59 DSI H03 0.34 0.28 30 17 DSI H02 0.34 0.92 41 39 DSI H02 0.34 0.26 2 48 DSI HO 0.33 0.37 3 30 DSI H02 0.33 0.46 19 63 DSI H02 0.33 0.36 25 9 DSI H07 0.33 0.29 30 55 DSI H05 0.33 0.39 40 60 DSI H02 0.33 0.52 43 50 DSI H02 0.33 0.33 2 49 DSI H02 0.32 0.35 2 85 DSI H04 0.32 0.22 13 21 DSI H02 0.32 0.39 21 87 DSI HO1 0.32 0.37 22 34 DSI HO1 0.32 0.47 31 39 DSI H02 0.32 0.28 40 57 DSI H02 0.32 0.39 43 47 DSI H02 0.32 0.23 44 39 DSI H02 _ 0.32 0.29 5 59 DSI H02 0.31 0.32 8 60 DSI H_01 _ 0.31 0.39 12 59 DSI HO1 0.31 0.29 17 49 DSI HO1 0.31 0.26 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-15

__ Steam Generator 2 Row Col Ind Elev PlggedL EOC-13 Volts EOC-12 Voltst2 )

30 70 DSI HO 0.31 0.31 32 63 DSI HO 0.31 0.24 41 67 DSI HO 0.31 0.48 8 13 DSI H02 0.3 0.26 37 26 DSI H02 0.3 0.18 2 42 DSI HO 0.29 0.31 2 90 DSI HO 0.29 0.36 6 57 DSI H02 0.29 0.36 2 22 DSI H02 0.28 0.33 7 27 DSI HO 0.28 0.29 7 72 DSI HO 0.28 0.65 36 42 DSI HO 0.28 0.29 40 48 DSI H05 0.28 0.29 39 31 DSI H02 0.27 0.36 43 43 DSI H03 0.27 0.21 2 49 DSI HO1 0.26 0.48 38 28 DSI H02 0.26 0.32 38 74 DSI H04 0.26 0.26 39 25 DSI H02 0.26 0.28 40 31 DSI H02 0.26 0.16 45 39 DSI H03 0.26 0.24 2 77 DSI HO 0.25 0.32 6 13 DSI H04 0.25 0.31 43 49 DSI H02 0.25 0.31 14 18 DSI H02 0.24 0.18 29 17 DSI H02 0.24 0.42 43 53 DSI H04 0.24 0.59 9 69 DSI H02 0.23 0.22 20 33 DSI H04 0.23 0.23 21 20 DSI H02 0.23 0.13 29 61 DSI H03 0.23 0.31 29 79 DSI HO1 0.23 0.19 39 40 DSI H02 0.23 0.27 18 14 DSI H02 0.22 0.41 8 42 DSI H02 0.21 0.71 2 55 DSI HOI 0.2 0.7 30 20 DSI HOI 0.2 0.18 43 52 DSI H02 0.2 0.19 23 72 DSI H02 0.19 0.25 43 52 DSI H03 0.18 0.17 9 50 DSI H04 0.17 0.26 29 45 DSI H02 0.17 0.09 32 26 DSI HO1 0.17 0.23 Appendix A August 2005 SG-SGDA.05-29 Revision 0

A-16

_ _ Steam Generator 2 Row Col Ind Elev Plugged') EOC-13 Volts EOC-12 Volts""

41 37 DSI H04 0.17 0.15 35 42 DSI H02 0.16 0.26 4 22 DSI H02 0.14 0.68 8 34 DSI H03 0.14 0.22 11 25 DSI H02 0.13 0.26 (1) All indications greater than or equal to 2 volts at EOC-13 were subject to a Plus Point inspection. All DSI indications greater than 2 volts, confirmed by Plus Point inspection, were repaired by plugging.

(2) Indications without an EOC-12 Volts value were not used in the determination of growth rate.

DSS = Distorted Support Signal. Doesn't meet calling criteria for a DSI.

INR = Indication Not Reportable.

Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-17 Steam Generator 3 Row Col Ind Elev Plu ged11 ) EOC-13 Volts EOC-12 Volts""

9 2 DSI H01 Y 2.36 1.04 24 24 DSI HOI y 2.07 1.25 6 48 DSI H101 2.01 1.6 38 58 DSI H02 1.78 1.24 24 16 DSI H01 1.76 1.48 38 22 DSI HO1 1.73 1.18 32 23 DSI HO0 1.64 1.39 3 11 DSI HOI y 1.58 0.8 20 29 DSI 1H01 1.58 1.42 3 10 DSI H01 1.54 1.42 25 8 DSI H01 1.54 0.84 44 59 DSI H02 1.51 1.44 20 32 DSI H01 1.49 1.63 34 22 DSI H01 1A8 1.16 36 24 DSI H01 1.47 1.35 21 24 DSI H01 1.45 1.15 31 28 DSI H01 1.43 0.88 14 39 DSI H01 1.41 1.23 34 26 DSI H01 1.4 1.27 7 72 DSI H02 1.39 0.78 25 26 DSI H02 1.38 1.06 27 16 DSI H02 1.38 DNR 5 1 DSI H02 1.33 1.21 11 36 DSI H01 1.33 1.16 25 18 DSI H01 1.32 0.86 20 47 DSI H01 1.31 1.21 31 76 DSI H01 1.3 0.71 11 17 DSI H02 1.29 1.14 44 58 DSI H01 1.29 1.13 9 51 DSI HO1 1.27 1.06 20 26 DSI H02 1.27 0.98 24 29 DSI HO 1.27 1.09 30 50 DSI H01 1.27 1.03 44 33 DSI 101 1.26 1.44 7 93 DSI H02 1.25 1.07 26 35 DSI H01 1.25 0.9 34 72 DSI H02 1.24 0.9 14 4 DSI H01 1.22 0.88 15 3 DSI H01 1.22 1.23 9 48 DSI H01 1.2 1.57 11 37 DSI H01 1.2 0.83 21 20 DSI H02 1.2 0.92 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-18 Steam Generator 3 Row Col Ind Elev Plugged') EOC-13 Volts EOC-12 Volts(")

22 .52 DSI HO 1.2 0.89 30 23 DSI H01 1.2 1.15 27 30 DSI H02 1.18 1.02 13 36 DSI HO 1.17 0.77 24 35 DSI HO 1.17 0.6 20 31 DSI H01 1.16 1.12 39 26 DSI H02 1.16 0.95 6 38 *DSI HO1 1.14 1.13 27 16 DSI H01 1.14 0.79 27 26 DSI H02 1.14 1.26 3 29 DSI H01 1.13 0.83 23 13 DSI H01 1.13 0.67 3 5 DSI HO1 1.12 0.91 28 26 DSI HOl 1.12 0.78 9 5 DSI HO1 1.1 0.84 22 26 DSI H02 1.1 1.2 23 30 DSI H01 1.1 0.7 18 38 DSI HO1 1.09 0.9 24 12 DSI IH01_ 1.08 0.79 26 28 DSI H01 1.06 1.18 6 10 DSI HO1 1.05 1.06 9 8 DSI H01 1.05 0.85 26 9 DSI H01 1.05 0.66 2 35 DSI H01 1.04 0.77 30 46 DSI H02 1.04 0.75 35 21 DSI H01 1.04 0.8 21 81 DSI H02 1.03 0.85 26 14 DSI H01 1.03 0.72 32 33 DSI H02 1.03 0.64 35 58 DSI 1H02 1.03 1.34 8 69 DSI H01 1.02 0.9 20 28 DSI H01 1.02 1.22 20 30 DSI H01 1.02 0.99 15 30 DSI H01 1 DSS 26 16 DSI H02 1 0.38 1 84 DSI H03 0.99 DSS 20 12 DSI H01 . 0.99 0.82 34 27 DSI H03 0.99 0.8 35 47 DSI H04 0.99 0.26 5 1 DSI H01 0.98 0.97 7 70 DSI H01 0.98 0.9 29 14 DSI H01 0.97 0.71 44 52 DSI H02 0.97 1.08 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-19

_ _Steam Generator 3 Row Col Ind Elev Plugged&') EOC-13 Volts EOC-12 Volts~ 2) 7 14 DSI HO1 0.96 0.84 20 39 DSI HO1 0.96 1 9 11 DSI HO1 0.95 0.56 20 19 DSI HO1 0.95 0.94 24 19 DSI HO 0.95 0.76 26 22 DSI H04 0.95 0.86 26 23 DSI HO 0.95 0.3 27 15 DSI HO 0.93 0.85 31 32 DSI H02 0.93 1.03 7 1 DSI H02 0.92 0.83 7 92 DSI H03 0.92 0.85 22 28 DSI H02 0.92 1.08 7 24 DSI H02 0.91 0.73 5 10 DSI HO1 0.9 0.92 5 22 DSI HO1 0.9 0.92 10 14 DSI HO1 0.9 0.59 19 10 DSI HO1 0.9 0.79 5 4 DSI HO1 0.89 0.7 7 71 DSI HOl 0.88 0.61 17 6 DSI H02 0.88 0.6 24 16 DSI H02 0.88 1.02 24 12 DSI H02 0.87 0.58 36 33 DSI H03 0.87 1.08 4 25 DSI H02 0.86 0.83 36 38 DSI H02 0.85 0.6 43 44 DSI H04 0.85 0.29 15 6 DSI HO1 0.84 0.93 19 13 DSI HO1 0.84 0.81 9 21 DSI H02 0.83 0.64 13 3 DSI HO1 0.83 0.62 26 20 DSI H02 0.83 INR 36 31 DSI H05 0.83 0.87 4 60 DSI H02 0.82 0.63 12 35 DSI HO1 0.82 0.47 37 28 DSI H02 0.82 0.51 13 3 DSI H02 0.81 0.37 14 39 DSI H03 0.81 0.7 17 47 DSI HO1 0.8 1.06 24 21 DSI HOS 0.8 0.78 24 23 DSI H03 0.8 0.82 4 55 DSI H02 0.79 0.45 9 14 DSI HO1 0.79 0.64 15 15 DSI HO1 0.79 0.59 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-20 Steam Generator 3 Row Col Ind Elev Plueged") EOC-13 Volts EOC-12 Voltslz) 16 4 DSI HO1 _ _ 0.79 0.78 17 39 DSI H02 0.79 0.18 18 18 DSI H01 0.79 0.8 22 7 DSI HO 0.79 INR 22 38 DSI H01 0.79 INR 28 84 DSI HO1 0.79 0.5 32 42 DSI H02 0.79 0.7 40 24 DSI H03 0.79 0.66 9 23 DSI H03 0.78 0.77 33 49 DSI H02 0.77 0.53 13 53 DSI H01 0.76 0.35 27 35 DSI H01 0.76 0.88 9 15 DSI H03 0.75 0.74 26 29 DSI HOl 0.75 0.35 16 41 DSI HO1 0.74 0.63 18 35 DSI H01 0.74 0.88 38 25 DSI H03 0.74 0.63 4 51 DSI H01 0.73 0.66 14 20 DSI H02 0.73 0.46 16 4 DSI H02 0.73 0.67 20 35 DSI H03 0.73 0.63 30 46 DSI 1 H03 0.73 INR 34 25 DSI H01 0.73 0.33 3 2 DSI H03 0.72 0.71 6 1 DSI H01 0.72 0.61 7 60 DSI H01 0.72 0.51 12 35 DSI H02 0.72 DSS 24 24 DSI H02 _ _0.72 0.46 24 25 DSI H01 0.72 0.49 26 24 DSI H01 0.72 0.24 27 63 DSI H02 0.72 0.42 31 14 DSI H03 0.72 0.61 33 49 DSI H03 0.72 0.82 5 5 DSI H02 0.71 0.7 7 71 DSI H02 0.71 0.68 9 7 DSI H01 0.71 0.52 9 16 DSI H01 0.71 0.66 40 24 DSI H02 0.71 0.53 16 54 DSI 1H01 0.7 0.68 27 36 DSI H02 0.7 0.55 38 40 DSI H03 0.7 0.6 6 37 DSI H02 0.69 0.57 13 29 DSI H02 0.69 0.76 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-21 Steam Generator 3 Row Col lnd Elev Plugged')l EOC-13 Volts EOC-12 Volts,,,

27 24 DSI H02 0.69 0.76 40 41 DSI H03 0.69 0.34 8 22 DSI H03 0.68 0.89 19 22 DSI H02 0.68 0.65 32 78 DSI HO1 0.68 0.53 35 47 DSI H03 0.68 0.51 40 69 DSI H02 0.68 0.37 41 68 DSI H02 0.68 0.59 34 19 DSI 1H02 0.67 0.73 9 41 DSI HO1 0.66 0.68 11 6 DSI H01 0.66 0.43 12 35 DSI H03 0.66 0.54 17 22 DSI H01 0.66 0.68 20 80 DSI H03 0.66 0.77 22 68 DSI H02 0.66 0.31 6 38 DSI H03 0.65 0.31 15 6 DSI H02 _ 0.65 0.51 16 22 DSI H01 0.65 0.54 20 35 DSI H01 0.65 INR 39 26 DSI H03 0.65 0.62 2 39 DSI H02 0.64 0.61 3 1 DSI H01 0.64 0.49 3 5 DSI H05 0.64 0.44 5 17 DSI 1H02 0.64 0.42 7 56 DSI H01 0.64 0.37 27 63 DSI H03 0.64 0.62 31 76 DSI H02 0.64 0.5 33 25 DSI H04 0.64 0.57 34 28 DSI H04 0.64 0.4 34 61 DSI H04 0.64 INR 36 53 DSI H03 0.64 0.39 46 52 DSI H01 0.64 0.72 7 64 DSI H01 0.63 0.53 9 50 DSI H01 0.63 0.77 14 18 DSI H01 0.63 0.9 15 33 DSI H03 0.63 0.41 22 61 DSI H03 0.63 INR 23 14 DSI H03 0.63 0.67 32 25 DSI H02 0.63 0.43 2 79 DSI H01 0.62 0.48 9 20 DSI H02 0.62 0.46 5 4 DSI H03 0.61 0.46 5 12 DSI H01 0.61 0.67 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-22

_ Steam Generator 3 Row Col Ind Elev Plumged"I) EOC-13 Volts EOC-12 Volts,2 )

8 28 DSI HO1 0.61 0.6 8 63 DSI HO1 0.61 0.6 15 16 DSI HO1 0.61 0.36 15 18 DSI H02 0.61 0.4 19 22 DSI HOl 0.61 0.7 33 36 DSI H03 0.61 0.31 33 40 DSI HO1 0.61 INR 17 53 DSI H01 0.6 INR 32 57 DSI H03 0.6 0.53 2 31 DSI H03 0.59 0.58 32 77 DSI HOI 0.59 0.4 38 36 DSI H02 0.59 0.68 3 51 DSI H02 0.58 0.71 7 93 DSI HOI 0.58 0.44 8 18 DSI H03 0.58 0.56 8 52 DSI H01 0.58 0.42 14 52 DSI HO1 0.58 0.29 31 26 DSI H02 0.58 INR 34 61 DSI HO1 0.58 INR 8 18 DSI H05 0.57 0.69 9 13 DSI H02 0.57 0.55 25 72 DSI H02 0.57 0.14 41 30 DSI HO1 0.57 0.44 1 76 DSI H03 0.56 0.62 2 25 DS9 H03 0.56 0.36 12 22 DSI H02 0.56 0.5 15 3 DSI H02 0.56 0.64 8 24 DSI H03 0.55 0.52 13 54 DSI HO1 0.55 0.43 15 29 DSI H02 0.55 0.96 20 6 DSI HO1 0.55 0.2 22 21 DSI H01 0.55 0.41 37 68 DSI H02 0.55 0.55 42 63 DSI HO1 0.55 INR 8 63 DSI H02 0.54 0.5 9 48 DSI H02 0.54 0.44 10 5 DSI HO1 0.54 0.41 11 16 DSI H03 0.54 0.46 31 20 DSI H01 0.54 0.39 34 36 DSI H03 0.54 0.45 3 2 DSI H01 0.53 0.32 3 34 DSI H01 0.53 0.67 17 12 DSI H01 0.53 0.35 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-23

_ _ Steam Generator 3 Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts""

4 26 DSI HOI 0.52 0.54 7 94 DSI H03 _ 0.52 0.41 18 21 DSI HO1 0.52 0.51 21 84 DSI H04 0.52 0.26 27 79 DSI H06 0.52 0.22 30 42 DSI H02 0.52 0.47 2 73 DSI H02 0.51 0.37 7 29 DSI HO1 0.51 0.37 26 25 DSI H02 0.51 0.47 37 26 DSI H02 0.51 0.38 7 25 DSI H02 0.5 0.49 38 42 DSI H03 0.5 INR 8 15 DSI H02 0.49 0.17 9 4 DSI HOl 0.49 0.5 9 12 DSI HO1 0.49 0.63 13 10 DSI H02 0.49 0.54 32 21 DSI HOI 0.49 0.32 33 70 DSI H02 0.49 0.37 37 31 DSI H03 0.49 0.66 38 58 DSI H03 0.49 0.77 39 68 DSI H04 0.49 0.62 2 16 DSI HO1 0.48 0.5 8 51 DSI HO1 0.48 0.43 8 59 DSI HO1 0.48 0.4 8 64 DSI HO1 0.48 0.44 27 18 DSI HOI 0.48 0.26 27 68 DSI H02 0.48 0.36 30 42 DSI H03 0.48 0.4 38 25 DSI HO1 0.48 0.44 39 26 DSI HO1 0.48 0.4 7 61 DSI HO1 0.47 0.43 7 93 DSI H03 0.47 0.31 24 10 DSI HO _ 0.47 0.38 7 25 DSI H01 0.46 0.44 20 88 DSI HO1 0.46 0.6 25 24 DSI H02 0.46 0.23 25 35 DSI HO1 0.46 0.35 34 51 DSI H02 0.46 0.7 7 91 DSI H02 0.45 0.6 8 70 DSI H03 0.45 0.3 26 17 DSI H02 0.45 0.43 6 48 DSI H03 _ _0.44 0.48 20 85 DSI H03 0.44 0.14 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-24

_ Steam Generator 3 Row Col Ind Elev Plugged(l) EOC-13 Volts EOC-12 VoltS(Z) 24 21 DSI H03 0.44 0.49 25 24 DSI H01 0.44 0.26 27 26 DSI HO1 0.44 INR 31 26 DSI H03 0.44 0.41 33 27 DSI HO1 0.44 0.68 33 36 DSI H02 0.44 0.33 33 45 DSI H02 0.44 0.4 38 58 DSI H05 0.44 0.1 9 52 DSI HO1 0.43 0.5 13 7 DSI HO1 0.43 0.39 25 14 DSI H04 0.43 0.56 32 54 DSI H02 0.43 MNR 37 42 DSI H03 0.43 INR 42 33 DSI H01 0.43 0.15 43 59 DSI HO 0.43 0.46 3 94 DSI H02 0.42 0.22 6 79 DSI H02 0.42 0.43 16 24 DSI HO 0.42 0.76 17 13 DSI HO1 0.42 0.29 32 20 DSI HO 0.42 0.3 4 34 DSI H01 0.41 0.32 7 71 DSI H03 0.41 0.45 8 50 DSI HO1 0.41 0.34 16 5 DSI H04 0.41 0.34 30 18 DSI HO1 0.41 0.21 36 68 DSI H02 OA1 0.16 3 1 DSI H02 0.4 0.33 11 5 DSI H03 0.4 0.1 13 29 DSI HO1 0.4 0.67 15 37 DSI HO1 0.4 0.27 27 18 DSI H03 0.4 0.33 30 21 DSI HO1 0.4 0.27 32 34 DSI H02 0.4 0.46 36 40 DSI H04 0.4 0.29 15 39 DSI HO1 0.39 0.32 35 58 DSI H05 0.39 0.37 38 46 DSI H02 0.39 0.36 7 72 DSI H01 0.38 0.55 13 44 DSI H02 0.38 0.35 26 22 DSI H06 0.38 0.13 28 14 DSI H01 0.38 INR 37 66 DSI H04 0.38 0.2 14 6 DSI1H03 0.37 0.23 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-25 Steam Generator 3 Row Col Ind Elev Plugged) EOC-13 Volts EOC-12 Volts()

23 22 DSI H01 0.37 0.5 26 22 DSI H05 0.37 0.34 4 39 DSI HO 0.36 0.34 27 67 DSI H02 0.36 0.23 21 15 DSI H02 0.35 0.29 34 25 DSI H04 0.35 0.36 35 24 DSI H03 0.35 0.34 14 14 DSI HO 0.34 0.42 23 60 DSI H02 0.34 0.34 33 44 DSI HO0 0.34 0.27 33 67 DSI H04 0.34 0.15 7 14 DSI H02 0.33 0.38 13 9 DSI H01 0.33 0.29 21 88 DSI HO1 0.33 0.36 31 65 DSI H02 0.33 0.94 41 30 DSI H03 0.33 0.27 9 6 DSI HO1 0.32 0.61 12 27 DSI H01 0.32 0.25 26 30 DSI H02 0.32 0.22 40 62 DSI H03 0.32 0.14 41 36 DSI H04 0.32 0.33 6 40 DSI H05 0.31 0.36 7 73 DSI H02 0.31 0.26 34 60 DSI H04 0.31 0.26 4 46 DSI H01 0.3 0.38 8 57 DSI H04 0.3 0.29 14 18 DSI H04 0.3 INR 18 37 DSI H02 0.3 0.14 18 89 DSI H01 0.3 0.34 23 44 DSI H01 0.3 0.65 32 48 DSI H02 0.3 INR 41 33 DSI H02 0.3 0.24 7 58 DSI H02 0.29 0.17 17 87 DSI H01 0.29 0.25 35 27 DSI H01 0.29 0.28 4 50 DSI H01 0.28 INR 5 4 DSI H02 0.28 0.14 21 41 DSI H01 0.28 0.14 11 16 DSI H06 0.27 0.17 36 42 DSI H04 0.27 INR 36 48 DSI H02 0.27 0.27 37 67 DSI H02 0.27 0.31 7 92 DSI 1101 0.26 0.22 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-26 Steam Generator 3 Row Col Ind Elev Plugged"') EOC-13 Volts EOC-12 Volts~z 13 17 DSI H02 0.26 0.27 13 5 DSI H03 0.25 0.16 14 41 DSI H02 0.25 0.21 18 45 DSI H03 0.25 0.73 20 79 DSI H02 0.25 0.05 27 68 DSI H05 0.25 0.28 34 19 DSI H03 0.25 0.36 43 50 DSI H04 0.25 0.34 9 2 DSI H03 y 0.24 INR 21 81 DSI H03 0.24 0.2 3 94 DSI H04 0.23 0.15 6 11 DSI H01 0.23 0.19 17 20 DSI H01 0.23 0.29 2 38 DSI H02 0.22 0.17 14 11 DSI H03 0.22 0.12 26 12 DSI H01 0.22 0.18 6 50 DSI H01 0.21 0.18 42 43 DSI H04 0.2 0.07 8 70 DSI H05 0.18 0.19 38 58 DSI H04 0.18 0.21 23 26 DSI H02 0.17 0.26 34 72 DSI H01 0.17 0.17 20 80 DSI H06 0.16 0.34 26 29 DSI H03 0.16 0.37 7 42 DSI H04 0.15 0.24 3 49 DSI H02 0.11 0.12 (1) All indications greater than or equal to 2 volts at EOC-13 were subject to a Plus Point inspection. All DSI indications greater than 2 volts, confirmed by Plus Point inspection, were repaired by plugging.

(2) Indications without an EOC-12 Volts value were not used in the determination of growth rate.

DSS = Distorted Support Signal. Doesn't meet calling criteria for a DSI.

INR = Indication Not Reportable.

Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-27 Steam Generator 4 Row Col Ind Elev Plugged')l EOC-13 Volts EOC-12 Volts(;)

8 3 DSI H02 y 1.74 1.03 7 48 DSI H01 1.67 1.65 8 37 DSI H01 1.64 1.59 20 40 DSI H01 1.64 1.01 22 70 DSI HO1 1.63 1.36 15 49 DSI H03 1.57 0.37 22 33 DSI H02 1.57 1.42 27 73 DSI H02 1.57 1.58 23 54 DSI HO1 1.54 1.44 20 69 DSI HO1 1.53 1.43 8 60 DSI H01 1.49 1.33 8 85 DSI H02 1.47 1.23 12 43 DSI H01 1.43 1 27 71 DSI H01 1.42 1.49 8 92 DSI HO1 1.41 1.41 2 76 DSI HO1 1.39 1.37 14 22 DSI HO1 1.39 1.06 9 38 DSI HO1 1.35 1.23 1 85 DSI H01 1.34 1.36 15 52 DSI H01 l 1.34 1.14 25 42 DSI HO1 1.31 0.91 26 68 DSI HOI 1.31 1.29 17 87 DSI HO1 1.3 0.97 28 67 DSI HO1 1.28 1.31 8 92 DSI H02 1.25 1.16 9 46 DSI HO1 1.24 0.88 20 48 DSI HOI 1.24 1.11 2 67 DSI HO1 1.23 1.12 13 48 DSI H01 1.23 1.18 14 57 DSI HO1 1.23 1.22 23 63 DSI HOI 1.23 1.05 9 35 DSI H01 1.21 1.26 25 40 DSI H01 1.21 1 4 82 DSI H101 1.2 1 9 42 DSI H01 1.2 1.19 12 32 DSI HO1 1.2 1.12 31 58 DSI H03 1.2 0.95 12 83 DSI HO1 1.19 1.21 8 34 DSI HO1 1.18 1.19 22 47 DSI H02 1.18 1.07 5 80 DSI H101 1.16 1.11 17 82 DSI H01 1.16 0.78 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-28 Steam Generator 4 Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts72 T 20 46 DSI H02 1.16 0.89 4 90 DSI H01 1.15 1.06 7 55 DSI HO1 1.15 0.94 5 42 DSI HOI 1.14 1.02 20 34 DSI H02 1.14 0.73 20 60 DSI HOI 1.14 1.04 2 55 DSI HO1 1.12 1.09 5 28 DSI HO1 1.12 1.15 5 89 DSI HO1 1.11 0.83 32 67 DSI H02 1.1 1.08 3 71 DSI HO1 1.07 0.81 8 59 DSI HO1 1.07 0.91 12 44 DSI HO1 1.07 0.9 28 65 DSI H01 1.06 0.78 29 30 DSI H02 1.06 0.25 15 53 DSI HO1 1.05 0.91 28 35 DSI H02 1.05 0.48 6 88 DSI H01 1.04 0.96 8 52 DSI H01 1.04 0.89 23 87 DSI HO1 1.04 0.79 4 94 DSI HO1 1.03 1.07 5 34 DSI HO1 1.03 0.81 9 48 DSI H01 1.03 0.83 12 24 DSI H01 1.03 1 17 26 DSI H02 1.03 1 5 39 DSI H01 1.02 1.03 9 57 DSI HO1 1.02 1.02 19 51 DSI HO1 1.02 0.87 23 73 DSI H02 1.02 0.92 25 53 DSI H01 1.02 0.96 26 73 DSI H02 1.02 0.83 6 74 DSI 1101 1.01 0.83 15 48 DSI H101 1.01 0.46 17 21 DSI HOI 1.01 0.35 20 70 DSI H02 1.01 0.91 8 41 DSI H01 1 0.73 27 63 DSI H02 1 0.65 14 92 DSI HO1 0.99 1.2 20 25 DSI H01 0.99 1.04 28 71 DSI H01 0.99 1.01 12 62 DSI H01 0.98 0.66 12 76 DSI HOI 0.98 1.14 13 53 DSI HO1 0.98 0.89 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-29 Steam Generator 4 Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts(2 1 18 14 DSI H02 l 0.98 0.46 23 70 DSI l H01 l 0.98 1.1 25 41 DSI H1101 0.98 0.92 27 15 DSI H02 0.98 0.82 5 71 DSI 1101 0.97 0.83 9 22 DSI H02 0.97 1.07 20 39 DSI 1101 _ 0.97 0.9 2 74 DSI H02 0.96 0.7 3 18 DSI H02 _ 0.96 0.9 8 89 DSI H101 0.96 0.96 12 2 DSI H02 0.96 1.11 28 74 DSI H03 0.96 0.83 4 40 DSI HO1 0.95 0.83 4 89 DSI H03 0.95 0.83 8 83 DSI H1101 0.95 0.81 9 30 DSI 1101 0.95 0.88 19 84 DSI 1101 0.95 0.94 22 59 DSI H1101 0.95 0.87 26 33 DSI H02 0.95 0.81 4 92 DSI H03 0.94 0.79 5 91 DSI- HO 0.94 0.88 29 47 DSI 1101 0.94 0.44 31 71 DSI H01 0.94 0.92 36 62 DSI H02 0.94 0.86 7 58 DSI HO 0.93 0.8 14 77 DSI H01 0.93 0.95 32 62 DSI H01 0.93 0.65 8 32 DSI H01 y 0.92 1.03 9 2 DSI H02 0.92 0.86 10 12 DSI H02 0.92 0.74 22 41 DSI HO 0.92 0.89 23 64 DSI H01 0.92 0.86 27 69 DSI HO 0.92 0.9 27 76 DSI H01 0.92 DSS 3 43 DSI 1101 0.91 0.74 4 86 DSI H03 0.91 0.78 27 45 DSI HO1 0.9 0.58 2 53 DSI H02 . 0.89 0.61 7 59 DSI H01 0.89 0.75 20 50 DSI HO1 0.89 0.79 27 77 DSI H03 0.89 0.96 31 71 DSI H02 0.89 0.74 32 66 DSI H03 0.89 0.3 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-30 Steam Generator 4 Row Col Ind Elev Plugged('y EOC-13 Volts EOC-12 Volts(7) 8 71 DSI HOI 0.88 0.64 8 80 DSI H01 0.88 0.9 12 85 DSI H01 0.88 0.36 23 75 DSI H01 0.88 0.78 5 30 DSI HO1 0.87 0.74 5 38 DSI HOI 0.87 0.8 12 21 DSI H01 0.87 1.12 18 58 DSI HO1 0.87 0.85 20 32 DSI HO1 0.87 0.38 27 75 DSI HOI _ 0.87 1.15 27 75 DSI H02 0.87 0.78 27 77 DSI HO1 0.87 0.81 28 77 DSI HO1 0.87 0.8 29 48 DSI H01 0.87 0.64 32 69 DSI HO _ 0.87 0.87 9 21 DSI H02 0.86 0.83 12 41 DSI H01 0.86 0.7 20 59 DSI H01 0.86 0.88 26 35 DSI HO __ 0.86 0.72 27 82 DSI H03 0.86 0.85 28 72 DSI H02 0.86 0.83 4 23 DSI HO 0.85 0.8 5 83 DSI HO 0.85 0.41 8 17 DSI H02 0.85 0.98 12 18 DSI H02 0.85 0.73 20 47 DSI H02 0.85 0.39 25 60 DSI HOI 0.85 0.76 27 63 DSI H01 0.85 0.71 28 82 DSI H02 0.85 0.75 38 72 DSI H02 0.85 0.78 6 80 DSI HOI 0.84 0.86 9 44 DSI HO 0.84 0.92 13 47 DSI H01 _ 0.84 0.69 14 88 DSI HOI 0.84 0.68 23 66 DSI H01 0.84 0.76 23 69 DSI H02 0.84 0.77 23 86 DSI HO1 0.84 0.61 26 14 DSI H02 0.84 0.93 3 25 DSI H02 0.83 0.69 4 90 DSI H02 0.83 0.85 9 53 DSI HO1 0.83 0.75 13 42 DSI H01 0.83 0.89 14 90 DSI HO1 0.83 0.93 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-31 Steam Generator 4 Row Col Ind Elev Pluggedt') EOC-13 Volts EOC-12 Volts(2) 17 56 DSI HO 0.83 0.7 28 48 DSI H01l 0.83 0.71 28 75 DSI H02 0.83 0.78 29 18 DSI H07 0.83 0.85 4 87 DSI H03 0.82 0.5 5 35 DSI HO1 0.82 0.61 13 49 DSI H01 0.82 0.62 21 48 DSI H02 0.82 0.7 27 46 DSI H01 0.82 0.57 31 71 DSI H03 0.82 0.54 5 47 DSI HO 0.81 0.68 9 89 DSI H02 0.81 0.71 10 35 DSI H01 0.81 0.73 12 33 DSI H04 0.81 0.38 20 51 DSI HO 0.81 0.77 23 60 DSI H01 0.81 0.75 6 87 DSI H02 0.8 0.69 17 27 DSI HO 0.8 0.62 27 84 DSI H02 0.8 0.87 5 74 DSI H01 0.79 0.7 8 48 DSI HO 0.79 0.76 27 78 DSI H02 0.79 0.95 2 86 DSI H02 0.78 0.57 3 89 DSI H02 0.78 0.54 6 23 DSI H02 0.78 0.76 8 73 DSI H03 0.78 0.6 9 24 DSI H01 0.78 0.73 13 34 DSI HO 0.78 0.78 2 9 DSI H03 0.77 DSS 6 90 DSI HO 0.77 0.91 6 91 DSI HO1 0.77 0.72 8 50 DSI H01 0.77 0.5 8 89 DSI H02 0.77 0.45 9 43 DSI H01 0.77 0.79 12 71 DSI H10 0.77 0.73 16 80 DSI H03 0.77 0.5 20 57 DSI H01 0.77 0.47 23 65 DSI H02 0.77 0.86 28 75 DSI H01 0.77 0.95 28 78 DSI H01 0.77 0.68 31 72 DSI H02 0.77 0.7 32 70 DSI H02 0.77 0.71 5 93 DSI H01 0.76 0.75 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-32 Steam Generator 4 Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts(2) 8 36 DSI H01 0.76 0.49 12 61 DSI H01 0.76 0.64 15 54 DSI H01 0.76 0.75 18 57 DSI HO 0.76 0.93 20 64 DSI HO 0.76 0.49 25 80 DSI H02 0.76 0.72 27 79 DSI H02 0.76 0.73 28 81 DSI H03 0.76 0.64 32 62 DSI H02 0.76 0.69 8 78 DSI HO1 0.75 0.7 8 80 DSI H02 0.75 0.52 12 21 DSI H02 0.75 0.74 12 36 DSI HOI 0.75 0.56 12 37 DSI H02 0.75 INR 13 41 DSI H03 0.75 0.55 15 49 DSI H01 0.75 0.35 21 45 DSI H01 0.75 0.6 23 69 DSI H01 0.75 0.91 2 15 DSI H03 0.74 0.73 2 25 DSI HOl 0.74 0.63 6 81 DSI H02 0.74 0.29 12 63 DSI H01 0.74 0.72 14 83 DSI H01 0.74 0.54 14 89 DSI H01 0.74 0.95 16 91 DSI H01 0.74 0.56 25 83 DSI H01 0.74 0.75 27 65 DSI H01 0.74 0.53 28 72 DSI H01 0.74 0.85 32 75 DSI H04 0.74 0.5 4 87 DSI H01 0.73 0.75 6 75 DSI H01 0.73 0.6 6 90 DSI H04 0.73 0.69 14 59 DSI H01 0.73 0.49 21 51 DSI H01 0.73 0.41 4 78 DSI H01 0.72 0.71 17 57 DSI H01 0.72 0.53 27 74 DSI H01 0.72 0.81 32 64 DSI H02 _ 0.72 0.69 8 3 DSI H03 y 0.71 0.71 8 27 DSI H03 0.71 0.99 9 70 DSI H01 0.71 0.57 18 61 DSI H01 0.71 0.86 20 68 DSI H01 0.71 0.59 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-33 Steam Generator 4 Row Col Ind Elev Plugged"1 EOC-13 Volts EOC-12 Volts(2) 26 69 DSI HO 0.71 0.77 28 68 DSI HO1 0.71 0.76 3 90 DSI HO 0.7 DSS 9 19 DSI H02 0.7 0_53 13 50 DSI H03 0.7 0 56 22 65 DSI HO 0.7 0_73 26 14 DSI H03 0.7 0.59 26 19 DSI H02 0.7 0_73 26 36 DSI HO1 0.7 0_67 36 65 DSI HO1 0.7 0.55 2 38 DSI H03 0.69 0.66 8 42 DSI HO1 0.69 0.65 8 90 DSI H02 0.69 0.49 13 45 DSI HOl 0.69 0.66 20 63 DSI HO 0.69 0.91 22 46 DSI HO 0.69 0.5 22 59 DSI H02 0.69 0.72 27 74 DSI H02 0.69 0.64 4 90 DSI H03 0.68 0.31 7 46 DSI HOI 0.68 0.49 8 81 DSI HO1 0.68 0.49 9 63 DSI HO1 0.68 0.54 19 71 DSI HO1 0.68 0.73 23 72 DSI HO1 0.68 0.66 23 74 DSI HO1 0.68 0.71 31 72 DSI HO1 0.68 0.67 34 65 DSI HO1 0.68 0.42 39 49 DSI H02 0.68 0.69 2 53 DSI HO1 0.67 0.71 3 88 DSI HO1 0.67 0.6 6 66 DSI HO1 0.67 0.73 8 31 DSI HOI 0.67 0.81 12 35 DSI HO1 0.67 0.46 12 82 DSI HO1 0.67 0.66 20 52 DSI HO1 0.67 0.88 20 64 DSI H02 0.67 0.48 23 71 DSI H02 0.67 0.66 24 46 DSI HO1 0.67 0.57 25 43 DSI. HO1 0.67 0.74 27 77 DSI H02 0.67 0.67 27 81 DSI H03 0.67 0.6 33 51 DSI H02 0.67 0.5 39 70 DSI H03. 0.67 0.62 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-34 Steam Generator 4 Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts(2 )

6 18 DSI H03 0.66 0.59 12 40 DSI H01 0.66 0.65 12 75 DSI HOI 0.66 0.74 15 51 DSI H01 0.66 0.89 18 59 DSI HO1 0.66 0.4 20 34 DSI HO1 0.66 0.28 20 46 DSI H01 0.66 0.75 20 54 DSI HO 0.66 0.75 22 68 DSI H01 0.66 0.66 23 71 DSI HO1 0.66 0.69 27 80 DSI H03 0.66 0.69 28 66 DSI H02 0.66 0.58 29 51 DSI HOI 0.66 0.66 32 66 DSI HO 0.66 0.57 34 50 DSI H03 0.66 0.73 4 47 DSI H02 0.65 0.49 4 82 DSI H02 0.65 0.48 6 76 DSI H01 0.65 0.49 8 78 DSI H03 0.65 0.53 12 23 DSI HO 0.65 0.6 14 90 DSI H02 0.65 0.5 15 64 DSI HO 0.65 0.53 18 21 DSI HO 0.65 0.52 20 58 DSI H01 0.65 0.48 32 77 DSI H04 0.65 0.5 6 72 DSI HO 0.64 0.71 8 25 DSI HO 0.64 0.62 8 27 DSI HO 0.64 0.65 13 15 DSI H02 0.64 0.52 13 44 DSI H01 0.64 0.64 17 62 DSI H01 0.64 0.41 20 31 DSI HO 0.64 0.57 3 25 DSI H01 0.63 0.73 5 43 DSI HO 0.63 0.64 9 33 DSI H01 0.63 0.39 14 22 DSI H02 0.63 0.52 14 88 DSI H03 0.63 0.67 17 29 DSI H01 0.63 0.25 20 26 DSI H02 0.63 0.92 27 83 DSI H03 0.63 0.52 33 67 DSI H02 0.63 0.34 4 74 DSI H03 0.62 0.5 5 33 DSI H101 0.62 0.7 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-35 Steam Generator 4 Row Col Ind Elev Plugged"') EOC-13 Volts EOC-12 Volts(2 )

9 37 DSI HO 0.62 0.65 9 73 DSI H01 0.62 0.37 10 52 DSI HO 0.62 0.44 23 45 DSI 1101 0.62 0.43 40 57 DSI HO 0.62 0.46 3 92 DSI H01 0.61 0.49 8 29 DSI HO1 0.61 0.53 12 10 DSI H03 0.61 0.45 17 80 DSI 1101 0.61 0.32 28 45 DSI HO _ 0.61 0.45 31 76 DSI H03 0.61 0.59 8 55 DSI H01 0.6 0.53 14 75 DSI H02 0.6 0.53 14 79 DSI H02 0.6 0.51 17 91 DSI 1101 0.6 0.5 21 87 DSI HO1 0.6 0.84 27 65 DSI H02 0.6 0.6 27 82 DSI H05 0.6 0.51 28 81 DSI H02 0.6 0.55 31 72 DSI H03 0.6 0.52 2 72 DSI H02 0.59 0.6 5 92 DSI 1101 0.59 0.67 8 89 DSI H03 0.59 0.5 9 46 DSI H03 0.59 0.45 11 75 DSI H02 0.59 0.71 12 59 DSI 1101 0.59 0.42 18 46 DSI 1101 0.59 1.04 20 44 DSI H03 0.59 0.69 23 70 DSI H02 0.59 0.45 25 51 DSI 1101 0.59 0.51 29 43 DSI 1101 0.59 0.69 36 64 DSI H02 0.59 0.61 3 25 DSI H03 0.58 0.5 5 82 DSI 1101 0.58 DSS 6 84 DSI 1101 0.58 0.55 6 90 DSI H02 0.58 0.4 7 56 DSI 1101 0.58 0.54 9 47 DSI H01 0.58 0.53 12 24 DSI H02 0.58 0.83 12 74 DSI 1101 0.58 0.62 13 54 DSI H01 0.58 0.43 17 13 DSI H02 0.58 0.54 22 46 DSI 1H03- 0.58 0.64 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-36 Steam Generator 4 Row Col Ind Elev Plugged(') EOC-13 Volts EOC-12 Volts(z) 25 58 DSI HOl 0.58 0.62 28 24 DSI H04 0.58 0.59 28 66 DSI H03 0.58 0.65 31 55 DSI H02 0.58 0.57 34 25 DSI H02 0.58 0.98 35 73 DSI H02 0.58 0.46 41 52 DSI H02 0.58 0.3 2 74 DSI HO 0.57 0.64 5 63 DSI HO 0.57 0.44 8 12 DSI H03 0.57 0.53 8 27 DSI H02 0.57 0.5 9 37 DSI H02 0.57 0.5 13 46 DSI H01 0.57 0.43 17 21 DSI H04 0.57 0.58 26 65 DSI H02 0.57 0.91 34 58 DSI H02 0.57 0.54 2 38 DSI H02 0.56 0.55 8 67 DSI H03 0.56 0.43 8 85 DSI H01 0.56 0.88 13 52 DSI H01 0.56 0.49 18 67 DSI H01 0.56 0.7 20 12 DSI H02 0.56 0.57 20 44 DSI H02 0.56 0.59 22 8 DSI H02 0.56 0.55 27 73 DSI H03 0.56 0.43 29 38 DSI H01 0.56 0.37 4 25 DSI H01 0.55 0.61 5 78 DSI H02 0.55 0.4 5 79 DSI H01 0.55 0.36 6 91 DSI H02 0.55 0.44 8 86 DSI H01 0.55 0.58 9 61 DSI H01 0.55 0.46 13 33 DSI H01 0.55 0.4 17 61 DSI H01 0.55 0.61 22 46 DSI H02 0.55 0.61 24 52 DSI H02 0.55 0.65 29 19 DSI H06 ; 0.55 0.78 29 50 DSI H01 0.55 0.44 30 21 DSI H02 0.55 0.41 34 65 DSI H02 0.55 0.49 39 64 DSI H02 0.55 0.4 5 26 DSI H01 0.54 0.64 10 3 DSI H02 0.54 0.64 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-37 Steam Generator 4 Row Col Ind Elev Pluggedt') EOC-13 Volts EOC-12 Voltsg-12 38 DSI H05 0.54 0.36 13 77 DSI HO1 0.54 0.5 19 63 DSI HO1 0.54 0.8 28 74 DSI H05 0.54 0.43 28 80 DSI H03 0.54 0.54 32 68 DSI H02 0.54 0.61 6 2 DSI H02 0.53 0.57 6 24 DSI HO 0.53 0.61 6 90 DSI H03 0.53 0.59 8 38 DSI HO1 0.53 0.47 8 84 DSI H02 0.53 0.48 12 81 DSI HOI 0.53 0.81 22 25 DSI H03 0.53 0.68 23 68 DSI HO1 0.53 0.56 27 67 DSI H02 0.53 0.61 28 73 DSI HO1 0.53 0.75 34 64 DSI H02 0.53 0.57 34 66 DSI HO1 0.53 0.37 2 15 DSI H02 0.52 0.49 2 57 DSI HO1 0.52 0.55 4 12 DSI H02 0.52 0.62 4 77 DSI HO1 0.52 0.36 4 93 DSI H02 0.52 0.33 8 28 DSI HO1 0.52 0.53 8 56 DSI HO1 0.52 0.57 9 29 DSI HO1 0.52 0.47 19 77 DSI H02 0.52 0.47 27 72 DSI H03 0.52 0.57 32 67 DSI H03 0.52 0.48 35 38 DSI H03 0.52 0.52 4 84 DSI H02 0.51 0.63 6 32 DSI H02 0.51 0.28 6 78 DSI HO1 0.51 0.42 6 92 DSI HO1 0.51 0.33 7 57 DSI HO1 0.51 0.28 9 39 DSI HO1 0.51 0.61 11 68 DSI H07 0.51 0.42 12 39 DSI H06 0.51 0.36 13 82 DSI H02 0.51 0.65 21 48 DSI HO1 0.51 0.54 31 40 DSI H02 0.51 0.35 4 14 DSI H06 0.5 0.51 6 28 DSI HO1 0.5 0.6 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-38 Steam Generator 4 Row Col Ind Elev Plugged~') EOC-13 Volts EOC-12 Volts-2 T 10 42 DSI HO1 0.5 0.36 13 29 DSI H02 0.5 0.43 15 50 DSI HOI 0.5 0.93 17 58 DSI HO1 0.5 0.51 17 72 DSI HO1 0.5 0.37 18 50 DSI HO1 0.5 0.59 28 64 DSI H02 0.5 0.48 28 79 DSI H03 0.5 0.49 36 24 DSI H04 0.5 0.48 36 57 DSI H02 0.5 0.39 45 51 DSI H04 0.5 0.52 4 28 DSI HO1 0.49 0.39 6 25 DSI H02 0.49 0.37 6 73 DSI HO1 0.49 0.41 8 92 DSI H04 0.49 0.36 9 11 DSI HO1 0.49 0.54 9 18 DSI H02 0.49 0.58 11 84 DSI H04 0.49 0.64 12 31 DSI H03 0.49 0.47 13 47 DSI H04 0.49 0.36 15 67 DSI HOI 0.49 0.57 21 89 DSI HO1 0.49 0.3 23 67 DSI H02 0.49 0.51 27 75 DSI H03 0.49 0.41 31 39 DSI HO1 0.49 0.47 36 68 DSI H02 0.49 0.32 39 42 DSI H03 0.49 0.57 8 35 DSI HO1 0.48 0.4 9 48 DSI H03 0.48 0.63 11 42 DSI HO1 0.48 0.39 15 62 DSI HO1 0.48 0.38 17 55 DSI HOI 0.48 0.43 20 29 DSI H04 0.48 0.22 23 61 DSI H02 0.48 0.48 26 62 DSI HO1 0.48 0.44 27 66 DSI H02 0.48 0.47 28 72 DSI H03 0.48 0.41 35 66 DSI H02 0.48 0.65 2 75 DSI HO 0.47 0.42 6 68 DSI HO1 0.47 0.34 8 40 DSI HO1 0.47 0.42 10 31 DSI HO1 0.47 0.34 12 74 DSI H02 0.47 0.22 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-39 Steam Generator 4 Row Col Ind Elev Plugged') EOC-13 Volts EOC-12 Volts(2 20 55 DSI H02 0.47 0.51 26 71 DSI HO _ 0.47 0.47 28 20 DSI HO1 0.47 0.45 28 62 DSI H02 0.47 0.43 28 63 DSI HO1_ 0.47 0.55 28 68 DSI H05 0.47 0.47 38 21 DSI HO _ 0.47 0.5 38 30 DSI H02 0.47 0.35 41 52 DSI HO 0.47 0.38 3 16 DSI H02 0.46 0.37 4 19 DSI H02 0.46 0.51 9 23 DSI HO 0.46 0.37 20 47 DSI H03 0.46 0.49 20 61 DSI HO 0.46 0.48 22 18 DSI H02 0.46 0.42 22 25 DSI H02 0.46 0.39 23 66 DSI H02 0.46 0.45 25 85 DSI HO 0.46 0.59 27 72 DSI H02 0.46 0.51 31 58 DSI H02 0.46 0.3 32 71 DSI H03 0.46 0.36 37 63 DSI HO 0.46 0.54 38 34 DSI H02 0.46 0.37 39 27 DSI H03 0.46 0.48 4 8 DSI H06 0.45 0.41 6 45 DSI HO 0.45 0.39 15 4 DSI H02 0.45 0.4 19 42 DSI HO 0.45 0.31 25 50 DSI HO y 0.45 0.28 27 78 DSI HO0 0.45 0.48 27 80 DSI H02 0.45 0.43 28 28 DSI H04 0.45 0.26 32 39 DSI HO1 0.45 0.35 37 72 DSI HO1 0.45 0.51 42 38 DSI H02 0.45 0.61 3 18 DSI HO1 0.44 0.27 4 90 DSI H06 0.44 0.41 5 76 DSI HO1 0.44 0.35 8 31 DSI H03 0.44 0.36 8 33 DSI HOI 0.44 0.51 10 20 DSI H02 0.44 0.44 12 27 DSI HO1 0.44 0.39 20 25 DSI H02 0.44 0.48 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-40 Steam Generator 4 Row Col Elev Plugged(" ld EOC-13 Volts EOC-12 Volts(")

23 56 DSI H02 0.44 0.36 26 19 DSI H03 0.44 0.42 26 64 DSI HO1 0.44 0.46 30 25 DSI H02 0.44 0.31 32 74 DSI HO1 0.44 0.7 34 47 DSI HO1 0.44 0.45 2 54 DSI H05 0.43 0.44 2 90 DSI HO1 0.43 0.49 17 31 DSI H04 0.43 0.51 18 36 DSI H03 0.43 0.39 21 15 DSI H06 0.43 0.38 26 27 DSI H03 0.43 0.37 32 64 DSI HO1 0.43 0.58 33 68 DSI HO1 0.43 0.5 34 68 DSI H02 0.43 0.39 8 30 DSI HO1 0.42 0.54 9 25 DSI HO1 0.42 0.38 9 74 DSI H04 0.42 0.34 12 36 DSI H02 0.42 0.32 14 81 DSI H02 0.42 0.37 15 63 DSI HO1 0.42 0.31 16 43 DSI HO1 0.42 0.26 18 32 DSI H03 0.42 0.46 20 46 DSI H03 0.42 0.48 28 70 DSI H02 0.42 0.4 32 44 DSI H04 0.42 0.56 32 70 DSI HO1 0.42 0.73 32 70 DSI H04 0.42 0.35 36 56 DSI H02 0.42 0.48 36 60 DSI H02 0.42 0.47 2 14 DSI H03 0.41 0.37 2 94 DSI HO1 0.41 0.4 5 44 DSI HO1 0.41 0.4 8 12 DSI HO1 0.41 0.53 8 39 DSI HO1 0.41 0.58 9 12 DSI HO1 0.41 0.36 12 39 DSI HO1 0.41 0.41 14 60 DSI HOI 0.41 0.31 15 65 DSI HO1 0.41 0.51 16 35 DSI HO1 0.41 0.34 16 83 DSI H101 0.41 0.72 20 46 DSI H06 0.41 0.41 28 48 DSI H03 0.41 0.49 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-41 Steam Generator 4 Row Col Ind Elev Plugged("' EOC-13 Volts EOC-12 Volts 32 65 DSI H02 0.41 0.35 32 71 DSI HO1 0.41 0.29 36 52 DSI H02 0.41 0.28 39 50 DSI H02 0.41 0.37 4 27 DSI HO 0.4 0.4 6 30 DSI H01 0.4 0.52 9 34 DSI H01 0.4 0.38 18 16 DSI H05 0.4 0.44 18 40 DSI H01 0.4 0.36 18 64 DSI H1-01 0.4 0.43 20 31 DSI H03 0.4 0.37 27 20 DSI H01 0.4 0.28 28 70 DSI HO 0.4 0.37 30 81 DSI H02 0.4 0.32 31 54 DSI HO 0.4 0.48 32 20 DSI H02 0.4 0.3 38 24 DSI H03 0.4 0.45 39 37 DSI H03 0.4 0.42 2 84 DSI HO 0.39 0.34 12 38 DSI H101 0.39 0.41 13 46 DSI H03 0.39 0.27 18 33 DSI H05 0.39 0.48.

26 20 DSI H02 0.39 0.48 28 81 DSI H05 0.39 0.4 29 27 DSI H02 _ 0.39 0.41 29 57 DSI HO1 0.39 0.24 34 24 DSI H04 0.39 0.34 38 32 DSI H02 0.39 0.38 40 67 DSI Hl-01 0.39 0.36 3 88 DSI H02 0.38 0.45 4 41 DSI H1101 0.38 0.38 5 75 DSI H03 _ 0.38 0.31 12 26 DSI HO1 0.38 0.3 17 56 DSI H02 0.38 0.3 18 48 DSI H01 0.38 0.34 19 43 DSI H02 0.38 0.4 19 53 DSI H04 0.38 0.26 23 44 DSI H03 0.38 0.37 25 22 DSI H02 0.38 0.4 27 18 DSI H02 0.38 0.36 29 35 DSI HO 0.38 0.34 34 70 DSI H03 0.38 0.41 36 72 DSI H1_01 0.38 0.36 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-42 Steam Generator 4 Row Col Ind Elev Plugged"') EOC-13 Volts EOC-12 Volts~z) 39 41 DSI H03 0.38 0.28 5 46 DSI HO 0.37 0.39 6 87 DSI H03 0.37 0.22 19 76 DSI H02 0.37 0.35 20 47 DSI HOI 0.37 0.4 20 65 DSI HO 0.37 0.55 22 24 DSI H03 0.37 0.32 27 83 DSI H04 0.37 0.2 28 40 DSI H02 0.37 0.39 28 68 DSI H02 0.37 0.43 34 59 DSI H02 0.37 0.18 38 26 DSI H02 0.37 0.42 9 50 DSI HO1 0.36 0.33 13 39 DSI H02 0.36 0.36 13 43 DSI H03 0.36 0.65 16 45 DSI HO1 0.36 0.37 18 21 DSI H02 0.36 0.47 20 62 DSI HO1 0.36 0.36 26 20 DSI H04 0.36 0.24 26 27 DSI H06 _ 0.36 0.34 26 29 DSI H02 0.36 0.27 26 31 DSI H03 0.36 0.37 27 62 DSI HO1 0.36 0.57 28 47 DSI H02 0.36 0.31 32 65 DSI HO1 0.36 0.35 34 69 DSI H02 0.36 0.22 36 57 DSI H03 0.36 0.43 36 59 DSI HO1 0.36 0.31 2 56 DSI H03 0.35 0.42 4 78 DSI H02 0.35 0.28 4 91 DSI HO1 0.35 0.25 9 28 DSI H02 0.35 0.36 12 59 DSI H05 0.35 0.36 14 85 DSI HO 0.35 0.32 19 90 DSI H02 0.35 0.3 21 12 DSI HO 0.35 0.34 28 81 DSI HO 0.35 0.37 34 72 DSI HOI 0.35 0.37 7 18 DSI H02 0.34 0.53 8 39 DSI H03 0.34 0.29 8 93 DSI H03 0.34 0.34 13 44 DSI H02 0.34 0.31 13 51 DSI HO1 0.34 0.24 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-43 Steam Generator 4 Row Col Ind Elev Plugged'l) EOC-13 Volts EOC-12 Volts(2) 17 30 DSI H01 0.34 0.23 19 87 DSI H03 0.34 0.33 20 42 DSI HO y 0.34 0.4 20 53 DSI H03 0.34 0.39 27 55 DSI H01 0.34 0.27 27 76 DSI H05 0.34 0.24 28 78 DSI H02 0.34 0.28 31 59 DSI H07 0.34 0.36 34 30 DSI H02 _0.34 0.54 36 65 DSI H02 0.34 0.18 2 92 DSI H01 0.33 0.39 5 1 DSI H02 0.33 0.29 8 4 DSI H02 0.33 0.35 12 41 DSI H03 0.33 0.41 13 68 DSI H02 0.33 0.39 13 70 DSI H01 0.33 0.3 15 48 DSI H03 0.33 INR 15 66 DSI H01 0.33 0.28 17 58 DSI H03 0.33 0.39 19 35 DSI H01 0.33 0.62 27 22 DSI H04 0.33 0.3 29 59 DSI H06 0.33 0.52 30 18 DSI H02 0.33 0.36 5 1 DSI H05 0.32 0.3 6 94 DSI H03 0.32 0.28 12 15 DSI H04 0.32 0.36 13 62 DSI H01 0.32 0.22 18 38 DSI H03 0.32 0.4 18 51 DSI H05 0.32 0.3 20 20 DSI H04 0.32 0.26 24 62 DSI H02 0.32 0.25 25 60 DSI H02 0.32 0.36 27 65 DSI H03 0.32 0.4 30 54 DSI H01 0.32 0.29 32 63 DSI H02 0.32 0.68 34 78 DSI H03 0.32 0.08 8 45 DSI H01 0.31 0.38 15 63 DSI H05 0.31 0.21 20 49 DSI H01 0.31 0.28 26 85 DSI H101 0.31 0.32 28 63 DSI H02 0.31 0.44 29 14 DSI 1101 ___ 0.31 0.32 32 63 DSI 1H04 0.31 0.37 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-44 Steam Generator 4 Row Col Ind Elev PluggedM') EOC-13 Volts EOC-12 Volts 35 35 DSI H02 0.31 0.26 36 48 DSI H02 0.31 0.53 39 42 DSI H04 0.31 0.3 3 34 DSI H02 0.3 0.29 4 22 DSI H02 0.3 0.34 5 91 DSI H03 0.3 0.23 9 10 DSI H02 0.3 0.31 9 47 DSI H03 0.3 0.36 15 50 DSI H02 0.3 0.53 15 61 DSI HO1 0.3 0.36 20 56 DSI HO ; 0.3 0.39 22 23 DSI H02 0.3 0.22 25 67 DSI H04 0.3 0.39 26 31 DSI H06 0.3 0.31 28 76 DSI H02 0.3 0.4 29 56 DSI H02 0.3 0.35 35 62 DSI H02 0.3 0.37 8 8 DSI H02 0.29 0.26 18 15 DSI H04 0.29 0.18 18 24 DSI H02 0.29 0.28 18 41 DSI H01 0.29 0.33 21 44 DSI HO1 0.29 0.26 23 73 DSI H06 0.29 0.3 27 66 DSI H04 0.29 0.29 28 77 DSI H02 0.29 0.33 29 27 DSI H07 0.29 0.21 35 69 DSI H01 0.29 0.25 36 54 DSI H04 0.29 0.27 6 39 DSI H02 0.28 0.24 20 39 DSI H03 0.28 0.29 26 47 DSI H03 0.28 0.27 27 53 DSI HO1 0.28 0.34 29 63 DSI 101 H 0.28 0.33 32 70 DSI H03 0.28 0.27 35 33 DSI H03 0.28 0.26 35 46 DSI H06 0.28 0.36 36 47 DSI H01 0.28 0.29 40 29 DSI H03 0.28 0.35 18 40 DSI H05 0.27 0.21 26 21 DSI H03 0.27 0.33 28 74 DSI H02 0.27 0.28 31 40 DSI H04 0.27 0.17 38 26 DSI H04 0.27 0.23 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-45

_______ Steam Generator 4 _ _ _ _ _ _ _ _ _

Row Col Ind Elev Plugged"' EOC-13 Volts EOC-12 VoltS(2 38 38 DSI H04 0.27 0.32 38 74 DSI H03 0.27 0.61 7 64 DSI HOI 0.26 0.29 9 36 DSI HO1 0.26 0.2 14 77 DSI H02 0.26 0.39 17 75 DSI HO1 0.26 0.29 18 42 DSI H04 0.26 0.26 25 53 DSI H02 0.26 0.19 32 49 DSI HO1 0.26 0.41 8 3 DSI H04 y 0.25 0.26 20 19 DSI H02 0.25 0.42 20 40 DSI H05 0.25 0.25 23 40 DSI HO1 0.25 0.18 29 28 DSI H02 0.25 0.29 37 65 DSI H02 0.25 INR 8 44 DSI H02 0.24 0.28 9 31 DSI HO 0.24 0.32 9 83 DSI HO1 0.24 0.3 11 69 DSI H04 0.24 0.31 18 15 DSI H03 0.24 0.25 18 69 DSI H02 0.24 0.39 26 72 DSI HO1 0.24 0.36 34 65 DSI H03 0.24 INR 35 65 DSI H03 0.24 0.16 17 9 DSI H02 0.23 0.12 18 11 DSI H04 0.23 0.19 22 17 DSI H06 0.23 0.38 22 70 DSI H02 0.23 0.46 28 76 DSI HO1 0.23 0.27 29 46 DSI H02 0.23 0.22 30 28 DSI H04 0.23 0.13 34 43 DSI HO1 0.23 0.32 39 66 DSI HO1 0.23 0.33 3 19 DSI H02 0.22 0.32 3 71 DSI H02 0.22 0.18 13 36 DSI H02 0.22 0.16 20 66 DSI H02 0.22 0.28 25 47 DSI H05 0.22 0.44 32 65 DSI H03 0.22 0.18 43 65 DSI HO1 0.22 0.32 5 1 DSI HO1 0.21 0.26 20 59 DSI H04 0.21 0.2 36 26 DSI H04 0.21 0.2 Appendix A August 2005 SG-SGDA-05-29 Revision 0

A-46 Steam Generator 4 Row Col Ind Elev Plugged')l EOC-13 Volts EOC-12 Volts(2 )

8 47 DSI HO1 0.2 0.19 15 69 DSI HO1 0.2 0.2 33 54 DSI HO1 0.2 0.28 7 33 DSI H03 0.19 0.17 22 41 DSI H04 0.19 0.11 36 67 DSI H06 0.19 0.15 37 62 DSI H04 0.19 0.31 5 37 DSI HO 0.18 0.31 28 24 DSI H06 0.18 0.16 38 74 DSI H04 0.18 0.13 12 26 DSI H02 0.17 0.3 27 63 DSI H03 0.17 1NR 11 69 .DSI H03 0.16 0.31 20 69 DSI H02 0.16 0.14 27 76 DSI H02 0.16 0.29 28 63 DSI H03 0.16 0.17 27 84 DSI HO1 0.15 0.26 18 15 DSI H02 0.13 0.17 27 74 DSI H03 0.13 0.17 5 87 DSI H04 0.12 0.11 (1) All indications greater than or equal to 2 volts at EOC-13 were subject to a Plus Point inspection. All DSI indications greater than 2 volts, confirmed by Plus Point inspection, were repaired by plugging.

(2) Indications without an EOC-12 Volts value were not used in the determination of growth rate.

DSS = Distorted Support Signal. Doesn't meet calling criteria for a DSI.

INR = Indication Not Reportable.

Appendix A August 2005 SG-SGDA-05-29 Revision 0

ENCLOSURE 2 TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT UNIT 2 STEAM GENERATOR W* ALTERNATE REPAIR CRITERIA UNIT 2 CYCLE 13 90-DAY REPORT

SQN Unit 2 Cycle 13 W*(Star) 90 Day Report

Calculated Main Steam Line Break Primary to Secondary Leakage Table 1 Leakage (gpm at MSLB) l Condition Monitoring SG1 SG2 SG3 SG4 ARC GL 95-05 Leakage 0.039 0.042 0.126 0.147 W* 0"-8" Leakage 0.050 0.130 0.020 0.208 W* 8"-12" Leakage 0.168 0.168 0.168 0.168 W* >12" Leakage 0.299 0.291 0.295 0.295 Total Leakage 0.556 0.631 0.609 0.818 Postulated Operational Assessment Worst SG (gpm)

ARC GL 95-05 Leakage 1.470 WV* 0"-8" Leakage 0.272 W* 8"-12" Leakage 0.187 W* >12" Leakage 0.298 Total Leakage 2.227 During the determination of the Postulated Main Steam Line Break (MSLB) primary to secondary leakage, all indications at the top of tubesheet were evaluated for W* leakage. All OD indications were either above the top-of-tubesheet and or above the associated Bottom of the Wextex Transition (BWT) and therefore not included.

All indications of Primary Water Stress Corrosion Cracking (PWSCC) at the top-of-tubesheet were included in the Condition Monitoring We leakage evaluation regardless of whether or not they were above the BWT. The location of upper crack tip was subtracted for the location of the BWT and then this value had the NDE uncertainty subtracted. If the value was negative, it was then assumed to be zero.

The Condition Monitoring assumed leakage was determined for each SG. To determine the Condition Monitoring leakage assumed in the 0" to 8" below the BWT region for each of the SGs, the indications were binned into the following bins; 0 to 1, I to 2, 2 to 3, and 3 to 4, etc. The leakage value for each of the bins was obtained from WCAP-14797, Rev 2, Figure 6.4-3. The quantity of indications in each bin was multiplied by the greatest leakage value for the bin (i.e., the 1 to 2 inch bin was multiplied by the 1 inch below the BWT leakage value from the Figure 6.4-3). The leakage value for the bins was summed to obtain the total in the 0" to 8 below the top of tubesheet region. To determine the Condition Monitoring assumed leakage in the 8 inch to 12 inch below the HTS region, the total historical count of indications 0 inches to 8 inches below the TTS from all four SGs plus the number of detected indications 0 inches to 8 inches below the TTS for all four SGs for the present outage were combined and 25% of this total was applied to each of the four SGs to determine the assumed quantity of indications in the 8 inches to 12 inches below the TTS region. This assumed quantity of indications was multiplied by 0.0045 gpm to obtain the 8 inches to 12 inches below the TTS leakage. To determine the Condition Monitoring assumed leakage in the greater than 12 inch below the HTS region, the quantity of tubes in service in the specific SG was used. This quantity of tubes was multiplied by 0.00009 gpm to obtain the W* leakage for the greater than 12 inch below the HTS region for each SG.

Operational Assessment assumed leakage was determined for a faulted SG. To determine the Operational Assessment assumed leakage in the 0' to 8" below the TTS region, an assumed quantity of undetected

indications was determined by utilizing the largest quantity over all four SG of indications in each of the bins (0 to 1", 1"to 2", 2" to 3", and 3" to 4", etc) and dividing that greatest bin quantity by 0.6 (assumed POD) and subtracting the quantity of tubes plugged. The leakage value for each of the bins was obtained from WCAP-14797, Rev 2, Figure 6.4-3. The quantity of indications in each bin was multiplied by the greatest leakage value for the bin (i.e., the I to 2 inch bin was multiplied by the 1 inch below the BWT leakage value from the Figure 6.4-3). The leakage value for the bins was summed to obtain the total in the 0" to 8 below the top of tubesheet region. To determine the Operational Assessment assumed leakage in the 8 inch to 12 inch below the HTS region, the total historical count of indications 0 inches to 8 inches below the TTS from all four SGs plus the number of projected indications 0 inches to 8 inches below the TTS for all four SGs for the upcoming fuel cycle was combined and 25% of this total determined the assumed quantity of indications in the 8 inches to 12 inches below the TTS region for the faulted SG. This assumed quantity of indications was multiplied by 0.0045 gpm to obtain the 8 inches to 12 inches below the TTS leakage. To determine the Operational Assessment assumed leakage in the greater than 12 inch below the HTS region, the quantity of tubes in service in the least plugged SG was used. This quantity of tubes was multiplied by 0.00009 gpm to obtain the W* leakage for the greater than 12 inch below the HTS region for the faulted SG.

W* Indications Table 2 Degradation SG Row Col Location BWT MV MD AD PDA Length Mechanism 2 5 18 HTS-2.17 HTS-0.17 0.27 26 13.92 0.13 PWSCC HTS AXIAL 2 6 71 HTS-0.86 HTS-0.74 0.32 80 49.25 0.12 PWSCC HTS AXIAL 2 19 21 HTS-3.35 HTS-0.47 0.35 78 38.77 0.13 PWSCC HTS AXIAL 3 26 41 HTS-1.73 HTS-0.35 0.19 65 39.53 0.16 PWSCC HTS AXIAL 4 1 49 HTS-1.07 HTS-0.41 0.43 67 43.53 0.30 PWSCC HTS AXIAL 4 1 51 HTS-4.66 HTS-0.44 0.73 44 27.04 0.24 PWSCC HTS AXIAL 4 1 55 HTS-0.64 HTS-0.24 0.46 48 26.41 0.34 PWSCC HTS AXIAL 4 1 55 HTS-0.41 HTS-0.24 0.26 13 10.00 _ 0.13 PWSCC HTS AXIAL 4 35 22 HTS-1.23 HTS-0.45 0.80 83 45.53 0.16 PWSCC HTS AXIAL 1 27 10 HTS-0.91 HTS-0.28 0.94 28 1.09 24.50 PWSCC HTS CIRC 2 16 34 HTS-0.15 HTS-0.32 0.24 78 4.05 25.10 PWSCC HTS CIRC Notes Length for axial indications is in inches and for circumferential indications is in degrees.

MV is Max Volts, MD is Max Depth, AD is Average Depth, and PDA is Percent Degraded Area W* Inspection Assessment W* Alternate Repair Criteria requires an assessment be performed to determine whether the results of the inspection were consistent with the expectations. These expectations are with respect to the number of flaws and flaw severity. The quantity of flaws found in the 4" to 8" regions below the top of the tubesheet is expected to be less than 25% of the total number of flaws. Table 2 is a listing of the indications subject to the W* assessment. Also, an assessment is required to be performed for whether W* identified newly initiated severe indications of cracking and if so include their potential leakage rate in the assessment.

Twenty-five W* region indications were predicted to be discovered during the U2C13 inspection. A total of eleven indications were detected in the W* region. Of the eleven indications only one (SG4 RI C51) is located in the 4" to 8" region below the top of the tubesheet. One of eleven indications is approximately 9 percent of the total number of indications detected. Therefore, less than 25% of the total quantity of indications is in the 4" to 8" region below the top-of-tubesheet (However, for the purpose of calculating a conservative leakage value, this indication was placed in the 3 to 4 inch bin due to the location of the associated BWT and the subtraction of NDE uncertainty). TVA predicts that 17 W* region indications will be detected during the next inspection (U2C14).

As an assessment of the severity of the flaws, the axial indications will be assessed and then the circumferential indications. The largest axial average depth detected U2C13 was less than 50% average depth. The largest axial depth growth rate was 19.5%/EFPY. This growth rate is less than the 90gh percentile growth rate for SQN Unit I and 2 PWSCC HTS Axial indications. The greatest Max-Depth was reported byNDE as 83%. Therefore none of the indications are assumed to be through-wall. The greatest axial length detected U2C13 was 0.34 inches. When compared to the recent Unit 1 or 2 inspections none of these values are considered severe. Also, only nine PWSCC HTS Axial indications were detected this outage when compared to eleven PWSCC HTS Axial indications U2C12 and compared to twenty PWSCC HTS Axial indications the U2C1 1 inspection. The PWSCC HTS Circumferential indications detected U2C13 were both within an inch of the top-of-tubesheet. The percent degraded area growth was less than the 81st percentile growth when compared to the SQN Unit 1 and 2 growth information. The quantity of circumferential indications (two) detected U2C13 is less than the four circumferential indications detected U2C12 and the six circumferential indications detected U2C1 1.

In addition to the above, the greatest Max-Volts for PWSCC HTS Axial indications was 0.80 volts and the greatest Max-Volts for PWSCC HTS Circumferential indications was 0.94 volts.. The EPRI Steam Generator In-Situ Pressure Test Guidelines, Rev 2, Table 4-1, states that the Voltage Threshold for PWSCC Axial at Explosive Expansion Transitions is 2.50 volts and the Voltage Threshold for PWSCC HTS Circumferential at Explosive Expansion is 1.25 volts. The Voltage Threshold is a value below which there is approximately a 90% probability of no leakage. Therefore, based on voltage amplitude there is at least a 90% probability that none of the eleven indications would leak during a Main Steam Line Break Accident.

SQN Unit 2 eddy current examinations of the hot leg top-of-tubesheet had a minimum depth of 8 inches below the top-of-tubesheet. The vendors examined a greater extent (typically one or two inches) in order to ensure the minimum 8 inches was achieved. Analysts would have identified indications in the data even if the indications were greater than 8 inches below the top-of-tubesheet. None were identified. Because none were identified, TVA believes that this provide some assurance that the methodology for predicting the quantity of indications in the 8" to 12" below the top-of-tubesheet is conservative.

Based on the preceding information, none of the top-of tubesheet indications were categorized as severe and therefore no changes were made to include additional leakage in the leakage model for W*.

Based on the above, it is concluded that the severity of flaws and quantities of flaws are consistent with the expectations for indications within the W* distance.

The SQN Unit 2 primary to secondary leakage limit during the postulated MSLB accident is 3.7 gpm. The Table 1 leakage value is below this limit and therefore acceptable.

v t e Letter Sequence Request
TAC:MC8118, (Approved, Closed)
Initiation Request, Request Acceptance... Administration Questions 13 January 2006 Answers 22 February 2006 Results Approval Other:
MONTHYEAR2006-01-13 [Table View]

ML052340503

Text

1.0 INTRODUCTION

SUMMARY

6.0 OPERATIONALASSESSMENT

7.0 REFERENCES

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