Text

Steam Generator Inspection Reports - Fall 2018 Refueling Outage
	ML19035A607
Person / Time
Site:	Beaver Valley
Issue date:	01/31/2019
From:	Bologna R; FirstEnergy Nuclear Operating Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	L-19-034
	Download: ML19035A607 (91)
	v • d • e

January 31, 2019 FENOC' FirstEnergy Nuclear Operating Corrpany Richard D. Bologna Site Vice President L-19-034 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001

SUBJECT:

Beaver Valley Power Station, Unit No. 2 Docket No. 50-412, License No. NPF-73 Steam Generator Inspection Reports - Fall 2018 Refueling Outage Beaver Valley Power Station P.O. Box 4 Shippingport, PA 15077 724-682-5234 Fax: 724-643-8069 In accordance with Beaver Valley Power Station, Unit No. 2 Technical Specifications 5.6.6.2.2 and 5.6.6.2.4, FirstEnergy Nuclear Operating Company hereby submits two reports containing steam generator inspection results. The enclosed reports provide information required by the technical specifications that were obtained during the fall 2018 refueling outage inspections. No steam generator tube intersections were removed during the inspections, and therefore, metallurgical examinations were not performed.

There are no regulatory commitments contained in this submittal. If there are any questions or if additional information is required, please contact Mr. Phil H. Lashley, Acting Manager - Nuclear Licensing and Regulatory Affairs, at 330-315-6808.

Enclosures:

A.

Beaver Valley Unit 2 End-of-Cycle 20 Analysis and Prediction for End-of-Cycle 21 Voltage-Based Repair Criteria 90-Day Report, Revision 0 B.

Unit #2 - 2R20 Steam Generator F* (F Star) Report cc:

NRC Region I Administrator NRC Resident Inspector NRC Project Manager Director BRP/DEP Site BRP/DEP Representative

Enclosure A L-19-034 Beaver Valley Unit 2 End-of-Cycle 20 Analysis and Prediction for End-of-Cycle 21 Voltage-Based Repair Criteria 90-Day Report, Revision 0 (77 Pages Follow)

SG-SGMP-18-24 Revision 0 Westinghouse Non-Proprietary Class 3 Beaver Valley Unit 2 End-of-Cycle 20 Analysis and Prediction for End-of-Cycle 21 Voltage-Based Repair Criteria 90-Day Report

@Westinghouse January 2019

WESTINGHOUSE NON-PROPRIETARY CLASS 3 SG-SGMP-18-24 Revision 0 Beaver Valley Unit *2 End-of-Cycle 20 Analysis and Prediction for End-of-Cycle 21 Voltage-Based Repair Criteria 90-Day Report Bradley T. Carpenter*, Principal Engineer Component Design and Management Programs January 2019 Reviewer: Thomas P. Magee*, Principal Engineer Component Engineering and Chemistry Operations Approved: Michael E. Bradley*, Manager Component Design and Management Programs Owner Accepted: ~_____;-=----~.....-l!i~--¥tiJC~~--=-O f / 1-:,,/ lal't G. A

cal Services Engineering Owner Accepted:

at-llJ _._ \\ /r7 / 1-0 I q S. Hovanec, Manager, T~ervices Engineering fJ.. £-ful - I-le.rel'"""

~ 5. Uo~t\\<tG-

Electronically approved records are authenticated in the Electronic Document Management System.

Westinghouse Non-Proprietary Class 3 ii SG-SGMP-18-24 January 2019 Revision 0 RECORD OF REVISIONS Revision Date Description 0

See EDMS Original

iii SG-SGMP-18-24 January 2019 Revision 0 TABLE OF CONTENTS RECORD OF REVISIONS............................................................................................................ ii TABLE OF CONTENTS............................................................................................................... iii LIST OF TABLES......................................................................................................................... iv LIST OF FIGURES.........................................................................................................................v 1

INTRODUCTION............................................................................................................ 1-1 2

SUMMARY

AND CONCLUSIONS................................................................................ 2-1 3

2R20 INSPECTION RESULTS AND VOLTAGE GROWTH RATES............................. 3-1 3.1 2R20 Inspection Results............................................................................................. 3-1 3.2 Voltage Growth Rates................................................................................................. 3-4 3.3 Probe Wear Criteria..................................................................................................... 3-4 3.4 NDE Uncertainties...................................................................................................... 3-5 4

DATABASE APPLIED FOR LEAK AND BURST CORRELATIONS........................... 4-1 4.1 Tube Material Properties............................................................................................ 4-1 4.2 Burst Correlation......................................................................................................... 4-1 4.3 Leak Rate Correlation................................................................................................. 4-1 4.4 Probability of Leak Correlation.................................................................................. 4-1 4.5 NDE Uncertainties...................................................................................................... 4-1 4.6 Upper Voltage Repair Limit....................................................................................... 4-1 5

SLB ANALYSIS METHODS........................................................................................... 5-1 6

BOBBIN VOLTAGE DISTRIBUTIONS......................................................................... 6-1 6.1 Calculation of Voltage Distributions.......................................................................... 6-1 6.2 Probability of Detection (POD).................................................................................. 6-2 6.3 Limiting Growth Rate Distribution............................................................................ 6-2 6.4 Cycle Operating Period.............................................................................................. 6-2 6.5 Projected EOC-21 Voltage Distribution..................................................................... 6-2 7

SLB LEAK RATE AND TUBE BURST PROBABILITY ANALYSES........................... 7-1 7.1 2R20 Condition Monitoring Leak Rate and Tube Burst Probability........................ 7-1 7.2 Cycle 21 Operational Assessment Leak Rate and Tube Burst Probability.............. 7-1 8

REFERENCES................................................................................................................. 8-1 APPENDIX A............................................................................................................................. A-1

iv SG-SGMP-18-24 January 2019 Revision 0 LIST OF TABLES Table 3-1 2R20 RPC Examinations due to Bobbin Calls.................................................... 3-2 Table 3-2 2R20 DSI Voltage Distribution for SG-A............................................................ 3-5 Table 3-3 2R20 DSI Voltage Distribution for SG-B............................................................ 3-6 Table 3-4 2R20 DSI Voltage Distribution for SG-C............................................................ 3-7 Table 3-5 Indication Distribution as Function of Tube Support Plate................................. 3-8 Table 3-6 Voltage Growth Cumulative Distribution............................................................ 3-9 Table 3-7 Growth Rate as a Function of BOC Voltage Range........................................... 3-10 Table 3-8 Indications with the Largest Growth in Cycle 20.............................................. 3-11 Table 4-1 7/8-Inch Tube Burst Pressure vs. Bobbin Amplitude Correlation....................... 4-3 Table 4-2 Tube Leak Rate vs. Bobbin Amplitude Correlation Parameters.......................... 4-4 Table 4-3 7/8-Inch Tube Probability of Leak Correlation Parameters................................. 4-5 Table 6-1 Predicted Voltage Distribution at EOC-21.......................................................... 6-3 Table 7-1 Condition Monitoring Leak and Burst Results for 2R20..................................... 7-2 Table 7-2 Operational Assessment Leak and Burst Results for EOC-21 (POD = 0.6)........ 7-2 Table A-1 SG-A 2R20 DSI Indications................................................................................ A-1 Table A-2 SG-B 2R20 DSI Indications.............................................................................. A-10 Table A-3 SG-C 2R20 DSI Indications.............................................................................. A-22

v SG-SGMP-18-24 January 2019 Revision 0 LIST OF FIGURES Figure 3-1 Voltage Distribution in SG A (Measured vs. Predicted).................................... 3-12 Figure 3-2 Voltage Distribution in SG B (Measured vs. Predicted).................................... 3-13 Figure 3-3 Voltage Distribution in SG C (Measured vs. Predicted).................................... 3-14 Figure 3-4 Number of Measured Bobbin DSI as a Function of TSP................................... 3-15 Figure 3-5 Voltage Growth / EFPY in SG-A during Cycle 20............................................ 3-16 Figure 3-6 Voltage Growth / EFPY in SG-B during Cycle 20............................................ 3-17 Figure 3-7 Voltage Growth / EFPY in SG-C during Cycle 20............................................ 3-18 Figure 3-8 Upper 5% of Growth/EFPY for SG-A............................................................... 3-19 Figure 3-9 Upper 5% of Growth/EFPY for SG-B............................................................... 3-20 Figure 3-10 Upper 5% of Growth/EFPY for SG-C............................................................... 3-21 Figure 3-11 Cycle 20 Voltage Growth vs. BOC Voltage....................................................... 3-22 Figure 6-1 SG-A Predicted Voltage Distribution at EOC-21................................................. 6-4 Figure 6-2 SG-B Predicted Voltage Distribution at EOC-21................................................. 6-5 Figure 6-3 SG-C Predicted Voltage Distribution at EOC-21................................................. 6-6

1-1 SG-SGMP-18-24 January 2019 Revision 0 1

INTRODUCTION This report provides a summary of the Beaver Valley Unit 2 steam generator (SG) bobbin and

+POINT'1 probe inspections at tube support plate (TSP) intersections from the fall 2018, 2R20 outage, together with postulated Steam Line Break (SLB) leak rate and tube burst probability analyses. The 2R20 outage represents the fifth application of the Generic Letter (GL) 95-05 (Reference 1) voltage based repair criteria, and implementation of its requirements, to the Beaver Valley Unit 2 Model 51M SGs. The criteria were implemented during the 2R16 outage. Information required by the GL 95-05 is provided in this report, including steam line break (SLB) leak rates and tube burst probabilities calculated using the end-of-cycle (EOC) conditions for the recently completed Cycle 20, representing a condition monitoring (CM) assessment of bobbin coil signal amplitudes for observed possible indications. In addition, a projection of EOC-20 bobbin coil voltage distributions, as well as the associated SG tube leak rates and burst probabilities through EOC-21 conditions is provided.

The condition monitoring analysis at End-of-Cycle 20 (EOC-20) was carried out using the actual bobbin coil voltage distributions measured during the 2R20 outage. These results show that the 2R20 condition monitoring leak rates and conditional burst probabilities for all three SGs are well within their respective allowable limits. A comparison with the projections made in the previous 90-Day Report at the 2R19 outage (Reference 2) shows that the predictions were conservative. These evaluations utilized the Westinghouse generic methodology that uses Monte Carlo analysis techniques (Reference 3).

The Operational Assessment (OA) analysis was performed to project leak rates and tube burst probabilities for postulated SLB conditions at the end of the upcoming cycle (EOC-21) based on the 2.0 volt repair criteria for 7/8-inch diameter tubes. These analyses utilized bobbin voltage distributions measured during the recent (2R20) inspection and a growth rate distribution bounding the last two inspections (2R19 and 2R20). Leak and burst analyses for the operational assessment were performed using the Reference 4 default value primary-to-secondary pressure differential of 2560 psi. The Cycle 21 operational assessment predicts that SG-B will be the limiting SG for projected leakage. With a Cycle 21 period of operation estimated at 525 effective full power days (EFPD), the limiting EOC-21 maximum leak rate for SG-B is projected to be 0.166 gpm (room temperature), which is well below the allowable limit of 2.2 gpm for the faulted SG. The corresponding maximum tube burst probability for the limiting SG (SG-C) of 2.43 x 10-5 is well below the GL 95-05 limit of 1.0 x 10-2. Thus, the GL 95-05 requirements are predicted to be satisfied at the EOC-21.

1 +POINT is a trademark or registered trademark of Zetec, Inc. Other names may be trademarks of their respective owners.

2-1 SG-SGMP-18-24 January 2019 Revision 0 2

SUMMARY

AND CONCLUSIONS A total of 1161 distorted support indications (DSI) in all three SGs combined were reported during the Beaver Valley Power Station Unit 2 (BVPS2) 2R20 bobbin coil inspection. Per GL 95-05, only those DSI signals with a bobbin coil signal amplitude of 2.0 volts or greater are required to be inspected using a +POINT (or equivalent) probe. All DSI signals reported during 2R20 were less than 2.0 volts, so no indications were required to be tested with the +POINT probe. However, some indications were tested with the +POINT probe to confirm the minimal bobbin coil voltage growth condition. These indications were confirmed as axial outside diameter stress corrosion cracking (ODSCC) using the +POINT probe during the 2R16 inspection and have been inspected with a

+POINT probe at each successive outage. In addition, in response to a prior Nuclear Regulatory Commission (NRC) question all DSIs greater than one volt were inspected with a +POINT probe.

The maximum bobbin coil voltage indication in all three SGs was 1.46 volts on R5 C28 at the 04H tube support plate in SG-A.

SLB leak rate and tube burst probability analyses were performed using the actual 2R20 bobbin voltage distributions (condition monitoring analysis) as well as the projected EOC-21 bobbin voltage distributions (operational assessment). The SLB leak rates from the condition monitoring analysis show significant margins relative to the faulted SG allowable limit of 2.2 gpm (room temperature), Reference 11. The corresponding condition monitoring tube burst probability values are well below the allowable limit of 1.0 x 10-2.

At 2R20, the largest SLB leak rate in the condition monitoring analysis is calculated for SG-B, with a magnitude of 0.0587 gpm, which is well below the allowable SLB leakage limit of 2.2 gpm in the faulted SG. All leak rate values quoted are equivalent volumetric rates at room temperature. The limiting conditional tube burst probability from the condition monitoring analysis, 1.5710-5 calculated for SG-C, is well below the NRC reporting guideline of 1.0 x 10-2. Thus, the condition monitoring results are well within the allowable limit/reporting guideline.

SLB leak rate and tube burst probability projections at the EOC-21 conditions were performed using the latest alternate repair criteria (ARC) database available for 7/8-inch outside diameter (OD) tubing (Addendum 7 update), which is documented in Reference 4. Leak and burst analyses for the Cycle 21 operational assessment were performed using the Reference 4 default primary-to-secondary pressure differential of 2560 psi. SG-B is predicted to be the limiting SG for leakage while SC-C is predicted to be the limited SG for probability of burst. For a projected Cycle 21 duration of 525 EFPD, the EOC-20 leak rate projected for SG-B using the GL 95-05 constant probability of detection (POD) of 0.6 is 0.166 gpm (at room temperature), which is less than the current limit of 2.2 gpm in the faulted SG. This leak rate projection utilized the leak rate calculation methodology of References 5 and 6. The limiting EOC-20 burst probability of 2.43 10-5 is calculated for SG-C and is well below the allowable limit of 1.0 x 10-2. Therefore, all acceptance criteria of Reference 1 will be satisfied throughout Cycle 21.

3-1 SG-SGMP-18-24 January 2019 Revision 0 3

2R20 INSPECTION RESULTS AND VOLTAGE GROWTH RATES 3.1 2R20 Inspection Results For outages prior to 2R16, the alternate repair criterion per GL 95-05 had been approved for BVPS2, but was not implemented. FirstEnergy Nuclear Operating Company (FENOC) had not implemented the criterion due to the small number of bobbin indications at TSP intersections which were confirmed to contain axial outside diameter stress corrosion cracking (ODSCC) using a +POINT probe. The criterion was implemented at 2R16 due to an increase in the number of distorted support plate indications (DSIs) confirmed to contain axial ODSCC from +POINT probe examination. It should be noted, for 2R16 and prior outages, the bobbin probe analysis utilized the guidance and requirements of GL 95-05. Since the initial 2R16 (and prior outages) inspection plan did not assume that GL 95-05 would be implemented, all bobbin coil DSIs were inspected using a +POINT probe. Note that under GL 95-05, only DSI signals with a 400/100 mix (hereafter referred to simply as the mix channel) signal amplitude of greater than 2.0 volts are required to be inspected using a +POINT probe.

In accordance with the guidance provided by GL 95-05, the 2R20 inspection of the Beaver Valley Unit 2 SGs consisted of a 100% eddy current (EC) bobbin probe full length examination of the tube bundles in all three SGs. All hot and cold leg TSP intersections were inspected using 0.720 inch diameter bobbin probes, with the exception of those hot leg TSP intersections in Rows 3 and 4 which contain SG tube sleeves at the hot leg top-of-tubesheet (TTS). In these two tubes, a 0.630 inch diameter wide groove bobbin probe was used for DSI detection. If a DSI was observed using the 0.630 inch wide groove bobbin probe and the DSI could not be re-examined with a qualified rotating coil technique, the tube was to be plugged or repaired per the Beaver Valley Unit 2 SG Examination Guidelines (Reference 13). During the 2R20 outage, two DSI indications were observed with the 0.630 inch wide groove probe; both in SG-B, at R4 C36 04H and R4 C48 03H. Both of these tube-to-TSP intersections were re-examined with a +POINT probe. The DSI at R4C48 03H was characterized as no defect found (NDF) after being inspected with a +POINT probe, while the DSI at R4C36 04H was confirmed to be a single axial indication (SAI) with a +POINT voltage of 0.14V. GL 95-05 states that smaller or larger diameter probes can be used to inspect tubes when it is impractical to utilize a nominal-size probe provided that the probes and procedures have been demonstrated to give an equivalent voltage response and detection capability when compared to the nominal (in this case 0.720 inch) probe. Probe equivalency testing between the nominal 0.720 inch probe and 0.640 inch wide-groove probe has been performed and it was demonstrated that the wide-groove probe met the equivalency requirements of Appendix H of the EPRI PWR Examination Guidelines (Reference 14). Due to thicker walled sleeves at Beaver Valley Unit 2, an electrically similar 0.630 inch wide-groove probe was used in place of the 0.640 inch probe. Other plants have used multiple wide-groove bobbin proves with similar difference in probe size where equivalent detection performance was documented. Therefore, the 0.630 inch probe provides similar detection capabilities of the 0.640 inch probe.

To assess depth growth, the 2R19 DSIs with +POINT probe confirmation were also inspected at 2R20, even though none were required to be inspected with a +POINT probe due to the low bobbin amplitudes. This inspection showed little or no change in the +POINT probe signal

3-2 SG-SGMP-18-24 January 2019 Revision 0 character, thus implying little or no depth growth of the indication. The largest +POINT probe signal amplitude in the 300 kHz channel from the confirmed DSI indications is only 0.44 volts (SG-A at R31 C74 02H), which represents a depth of 64% through-wall (TW) using the sizing protocol of Electric Power Research Institute (EPRI) Examination Technique Specification Sheet (ETSS) ETSS I28431. This particular indication was reported at 0.31 volts by +POINT probe during 2R19, which represents a 59% TW depth per ETSS I28431. Long term trending of the Unit 2 DSI population has shown a limited growth potential. For Cycles 10 through 20, the mean DSI voltage growth has been essentially zero. Additionally, the +POINT probe amplitudes for DSI signals confirmed as axial ODSCC have been much less than 1.0 volt, suggesting that a shallow depth of penetration exists. This in turn suggests the DSI voltage growth will remain minimal and not move to "extreme" over the next operating cycle. Thus, it can be concluded that the character of DSI indications reported to date has been associated with a depth of penetration well below 100% TW.

In addition, the EOC-20 eddy current inspection plan included 100% +POINT probe inspection of all hot leg and cold leg dents >5 volts (as measured from the bobbin probe), since GL 95-05 alternate repair criterion (ARC) does not apply to these tube-to-TSP intersections. The 2R20 eddy current inspection plan also included 100% +POINT probe inspection of dents with indication (DNI) due to this being a primary water stress corrosion cracking (PWSCC) concern and 25% of support plate residuals (SPR) due to this being an ODSCC concern. The DNI call can be generated by manual analysis or by using a tertiary auto analysis. As can be seen in Table 3-1, 1358 total DNI indications were tested using a rotating pancake coil (RPC) probe. No new instances of PWSCC or ODSCC were detected as a result of these tests. One tube location in SG-C (R13 C65 05H) has a historical SAI and DSI indication, with a bobbin DNI signal (1.72V) being newly identified during the 2R20 inspection.

SPRs are defined as bobbin coil signals which do not contain flaw-like components but have a signal amplitude of >1.5 volts and phase angles >55 degrees. Axial ODSCC indications were not reported in these populations based on the +POINT probe analysis. No axial PWSCC or circumferential stress corrosion cracking (SCC) was reported at any TSP intersection. The

+POINT probe inspection program for dents, DNIs, and SPRs was extensive. The following table provides the number of +POINT probe exams performed at TSP intersections as a result of these program requirements during 2R20.

Table 3-1 2R20 RPC Examinations due to Bobbin Calls SG

>5V Dents DNI SPR Total RPC Tested Total RPC Tested A

14 771 771 325 149 B

34 120 120 164 54 C

12 467 467 226 79

3-3 SG-SGMP-18-24 January 2019 Revision 0 The requirements of the GL 95-05 methodology in Section 1.b of Reference 1 are all satisfied.

Tube intersections with the flow distribution baffle are excluded from this GL 95-05 analysis.

There are no other excluded tube support plate intersections (Reference 7). None of the indications included in this analysis were detected in dents >5.0 volts, as measured by bobbin.

All SPR indications >2V were tested with the +POINT probe so that no ODSCC indications

>1.0 volt would be missed or misread. No copper signal interference was detected.

Table 3-2, Table 3-3 and Table 3-4 present the 2R20 bobbin voltage data for the TSP intersections in the three SGs with distorted support indications (DSIs). A total of 1161 TSP locations had DSI indications in all three SGs combined, of which only 22 indications had amplitudes greater than 1.0 volt and no indications were greater than 1.5 volts. For the analyses, the DSI indications are binned in 0.1 volt intervals where the numeric value of the bin represents the upper range of the bin. Therefore, the 1.0 volt bin contains DSI voltages from 0.91 to 1.00 volt. No DSI voltage exceeded the GL 95-05 lower voltage repair limit of 2.0 volts. For 2R20, all DSIs with a voltage amplitude greater than or equal to 1.0 volt were automatically tested using +POINT probe, which exceeds the requirement by GL 95-05 to test all DSIs with a voltage amplitude greater than or equal to 2.0 volts. Comparing the inspection results from 2R19 to 2R20, the following observations were made:

There were 74 new DSI indications in 2R20 o 36 in SG-A o 14 in SG-B o 24 in SG-C There were eleven new SAI/MAI indications confirmed by +POINT probe in 2R20, with the largest of these being recorded at 0.25V.

o Six (6) in SG-A o One (1) in SG-B o Four (4) in SG-C Table 3-2, Table 3-3 and Table 3-4 tabulate the number of field bobbin indications, the number of those indications that were +POINT probe RPC inspected, the number of +POINT probe RPC confirmed indications, and the number of indications removed from service. No tubes were deplugged in the current inspection with the intent of returning the tubes to service after inspection in accordance with the alternate repair criteria. The distribution of 2R20 indications is also shown in Figure 3-1, Figure 3-2, and Figure 3-3 for SG-A, SG-B, and SG-C, respectively.

The distribution of 2R20 indications as a function of support plate location is summarized in Table 3-5 and shown in Figure 3-4. The data show a strong predisposition of ODSCC to occur in the first few hot leg TSPs although the mechanism extended to higher TSPs. Only 23 indications were detected on the cold leg side; three of these exceeded 0.5 volt, but do not exceed 0.75 volt.

This distribution is consistent with that observed at other plants and is commonly attributed to the temperature dependence of ODSCC.

Appendix A provides a listing of all DSIs reported at the BVPS 2R20 outage in the form of tables (Table A-1, Table A-2, and Table A-3), whether axial ODSCC was confirmed (SAI/MAI in Comment column), whether the tube containing the indication(s) was plugged (Comment

3-4 SG-SGMP-18-24 January 2019 Revision 0 column), and whether the indication was tested and no defect was found (NDF in Comment column).

3.2 Voltage Growth Rates For projection of leak rates and tube burst probabilities at EOC-21, voltage growth rates were developed from the 2R19 and 2R20 inspection bobbin data. Growth is determined when the same indication can be identified in two successive inspections. Since there can be new indications in one outage, the number of indications for which a growth can be defined is less than the number of indications detected. Table 3-5 shows a distribution of growth as a function of TSP number.

Table 3-6 shows the frequency and cumulative probability distribution of growth as a function of voltage change in each BVPS2 steam generator during Cycle 20 on a per EFPY basis. The difference in the total number of DSIs between these two tables is due to new DSIs.

The average bobbin coil voltage growth rates for each SG during Cycle 20 are given in Table 3-7. The average growth rates over the entire voltage range are negative indicating essentially no overall voltage growth. The Cycle 20 growth rates on an EFPY basis for each SG are shown in Figure 3-5, Figure 3-6 and Figure 3-7. A general observation is that the cumulative growth observed during 2R20 is slightly less than that during 2R19 to varying degrees in each SG.

The growth figures also include curves which bound the growth observed during both Cycle 19 and Cycle 20 in SGs A, B and C, respectively, and the bounding growth curve was used in the OA.

Figure 3-8, Figure 3-9 and Figure 3-10 provide a magnified view of the upper 5% tail of the growth curves for SG-A, SG-B and SG-C, respectively.

Table 3-8 lists the top 15 indications based on Cycle 20 growth rate in descending order. The average growth rates over the entire voltage range for Cycle 20 are negative indicating essentially no voltage growth, but Table 3-8 shows that in cases of positive growth rates, that Cycle 20 had only modest growth. The growth during Cycle 20 for all indications was under 1.0 volts, with only five indications greater than 0.5 volts.

To determine if BVPS2 growth rates exhibited a potential dependency on the BOC voltage, the growth rate data for Cycle 20 was plotted against BOC voltage, and the resulting plot is shown in Figure 3-11. The Cycle 20 growth data do not show any tendency to increase with the BOC voltage; if at all, the growth seems to decrease with increasing BOC voltage. Therefore, growth can be assumed independent of voltage in the Monte Carlo analysis for the operational assessment.

3.3 Probe Wear Criteria The probe wear criteria approved by the NRC (Reference 8) was applied during the 2R20 inspection. When a probe does not pass the 15% wear limit, this alternate criteria requires that only tubes with indications above 75% of the repair limit inspected since the last successful probe wear check be re-inspected with a good probe. As the repair limit for Beaver Valley Unit 2 is 2 volts, all tubes containing indications for which the worn probe voltage is above 1.5 volts are to be inspected with a new probe. Since no indications had amplitudes over 1.5 volts, no tubes were retested due to the probe wear criteria being exceeded.

3-5 SG-SGMP-18-24 January 2019 Revision 0 3.4 NDE Uncertainties The NDE uncertainties applied for the Cycle 20 voltage distributions in the Monte Carlo analyses for leak rate and burst probabilities are the same as those in the NRC Generic Letter 95-05 (Reference 1). The probe wear uncertainty has a standard deviation of 7.0% about a mean of zero and has a cut-off at 15% based on implementation of the probe wear standard. If the random sample of probe wear selected during the Monte Carlo simulations exceeds 15%, sampling of the probe wear distribution is continued until a value less than 15% is picked. The analyst variability uncertainty has a standard deviation of 10.3% about a mean of zero with no cut-off. These nondestructive examination (NDE) uncertainty distributions are included in the Monte Carlo analyses for SLB leak rates and tube burst probabilities based on the 2R20 actual voltage distributions as well as for the EOC-21 projections.

Table 3-2 2R20 DSI Voltage Distribution for SG-A Voltage Bin Number of Indications

+POINT Probe Confirmed

+POINT Probe Tested But Not Confirmed Not

+POINT Probe Tested Plugged Returned to Service 0.1 20 0

0 20 0

20 0.2 95 4

0 91 0

95 0.3 96 6

2 88 0

96 0.4 67 4

0 63 0

67 0.5 26 2

1 23 0

26 0.6 18 2

0 16 0

18 0.7 7

0 0

7 0

7 0.8 7

1 0

6 0

7 0.9 5

0 0

5 0

5 1

3 0

0 3

1.1 1

0 1

0 0

1 1.2 2

2 0

0 0

2 1.3 0

0 0

0 1.4 0

0 0

0 1.5 1

0 1

0 0

1 Total 348 21 5

322 0

348 Average voltage = 0.310 volts

3-6 SG-SGMP-18-24 January 2019 Revision 0 Table 3-3 2R20 DSI Voltage Distribution for SG-B Voltage Bin Number of Indications

+POINT Probe Confirmed

+POINT Probe Tested But Not Confirmed Not

+POINT Probe Tested Plugged Returned to Service 0.1 18 0

0 18 0

18 0.2 104 4

0 100 0

104 0.3 115 5

0 110 1

114 0.4 69 2

0 67 0

69 0.5 59 4

0 55 0

59 0.6 36 1

0 35 0

36 0.7 15 2

1 12 0

15 0.8 11 0

1 10 0

11 0.9 7

0 0

7 0

7 1

0 6

0 7

1.1 4

1 3

0 0

4 1.2 1

0 1

0 0

1 1.3 2

0 2

0 0

2 1.4 1

0 1

0 0

1 Total 449 20 9

420 1

448 Average voltage = 0.348 volts

3-7 SG-SGMP-18-24 January 2019 Revision 0 Table 3-4 2R20 DSI Voltage Distribution for SG-C Voltage Bin Number of Indications

+POINT Probe Confirmed

+POINT Probe Tested But Not Confirmed Not

+POINT Probe Tested Plugged Returned to Service 0.1 13 0

0 13 0

13 0.2 68 2

0 66 0

68 0.3 90 5

1 84 0

90 0.4 62 4

0 58 0

62 0.5 56 3

4 49 0

56 0.6 29 4

1 24 0

29 0.7 25 2

3 20 0

25 0.8 7

0 0

7 0

7 0.9 4

2 0

4 1

3 0

1 2

0 3

1.1 1

0 1

0 0

1 1.2 1

0 1

0 0

1 1.3 3

0 3

0 0

3 1.4 1

1 0

0 0

1 1.5 1

0 1

0 0

1 Total 364 23 16 325 0

364 Average voltage = 0.372 volts

3-8 SG-SGMP-18-24 January 2019 Revision 0 Table 3-5 Indication Distribution as Function of Tube Support Plate SG-A SG-B TSP Number of Indications Max. Volts Average Volts Largest

Growth, Volts Average

Growth, Volts TSP Number of Indications Max. Volts Average Volts Largest

Growth, Volts Average

Growth, Volts 02H 126 1.18 0.312 0.51

-0.042 02H 180 1.4 0.377 0.59

-0.036 03H 90 1.04 0.343 0.86

-0.043 03H 135 1.04 0.367 0.55

-0.030 04H 46 1.46 0.296 0.19

-0.05 04H 61 1.07 0.298 0.28

-0.016 05H 46 0.83 0.316 0.11

-0.048 05H 38 0.75 0.272 0.06

-0.061 06H 13 0.51 0.235 0.07 0.007 06H 7

0.61 0.319 0.24

-0.013 07H 5

0.72 0.364 0.01

-0.064 07H 11 0.61 0.285 0.02

-0.033 08H 12 0.43 0.239 0.14

-0.059 08H 7

0.51 0.21 0.03

-0.026 03C 0

03C 1

0.24 0.24

-0.01

-0.01 04C 0

04C 1

0.12 0.12 0

0 05C 2

0.22 0.2 n/a n/a 05C 1

0.24 0.24 0

0 06C 3

0.24 0.167

-0.07

-0.075 06C 3

0.55 0.357 0.15

-0.02 07C 1

0.22 0.22 n/a n/a 07C 2

0.54 0.515

-0.03

-0.1 08C 4

0.24 0.138

-0.02

-0.07 08C 2

0.41 0.315 0.08 0.05 Total 348 Total 449 SG-C Composite TSP Number of Indications Max. Volts Average Volts Largest

Growth, Volts Average

Growth, Volts TSP Number of Indications Max. Volts Average Volts Largest

Growth, Volts Average

Growth, Volts 02H 137 1.33 0.429 0.42

-0.025 02H 443 1.4 0.375 0.59

-0.034 03H 105 1.22 0.392 0.39

-0.016 03H 330 1.22 0.368 0.86

-0.029 04H 52 1.44 0.293 0.85 0.023 04H 159 1.46 0.296 0.85

-0.014 05H 32 0.77 0.297 0.25

-0.071 05H 116 0.83 0.296 0.25

-0.059 06H 17 0.4 0.227 0.08

-0.034 06H 37 0.61 0.247 0.24

-0.017 07H 10 0.51 0.297 0.1

-0.024 07H 26 0.72 0.305 0.1

-0.038 08H 8

0.85 0.316 0.09

-0.041 08H 27 0.85 0.254 0.14

-0.043 03C 0

03C 1

0.24 0.24

-0.01

-0.01 04C 0

04C 1

0.12 0.12 0

0 05C 1

0.51 0.51

-0.04

-0.04 05C 4

0.51 0.288 0

-0.02 06C 0

06C 6

0.55 0.262 0.15

-0.042 07C 1

0.34 0.34 n/a n/a 07C 4

0.54 0.398

-0.03

-0.1 08C 1

0.43 0.43 n/a n/a 08C 7

0.43 0.23 0.08

-0.022 Total 364 Total 1161

3-9 SG-SGMP-18-24 January 2019 Revision 0 Table 3-6 Voltage Growth Cumulative Distribution SG-A SG-B SG-C Composite Voltage Change:

EOC-20 minus EOC-19 per EFPY Number of Indications Cumulative Probability Distribution Number of Indications Cumulative Probability Distribution Number of Indications Cumulative Probability Distribution Number of Indications Cumulative Probability Distribution

-0.79<V-0.7 1

0.003205 0

0 2

0.005882 3

0.00276

-0.69<V-0.6 1

0.00641 1

0.002299 1

0.008824 3

0.00552

-0.59<V-0.5 3

0.016026 0

0.002299 5

0.023529 8

0.012879

-0.49<V-0.4 5

0.032051 2

0.006897 5

0.038235 12 0.023919

-0.39<V-0.3 7

0.054487 6

0.02069 8

0.061765 21 0.043238

-0.29<V-0.2 12 0.092949 14 0.052874 6

0.079412 32 0.070837

-0.19<V-0.1 39 0.217949 63 0.197701 39 0.194118 141 0.202392

-0.09 <V0.0 151 0.701923 213 0.687356 116 0.535294 480 0.643974 0.01<V0.1 75 0.942308 112 0.944828 122 0.894118 309 0.927323 0.11<V0.2 11 0.977564 15 0.97931 22 0.958824 48 0.972401 0.21<V0.3 2

0.983974 7

0.995402 8

0.982353 17 0.98804 0.31<V0.4 1

0.987179 0

0.995402 3

0.991176 4

0.99172 0.41<V0.5 2

0.99359 0

0.995402 2

0.997059 4

0.9954 0.51<V0.6 1

0.996795 2

1.0 0

0.997059 3

0.99816 0.61<V0.7 1

1.0 0

0 0.997059 0

0.99816 0.71<V0.8 0

0 0

0.997059 0

0.99816 0.81<V0.9 0

0 1

1.0 2

1.0 Number of Indications with Growth 312 435 340 1087

3-10 SG-SGMP-18-24 January 2019 Revision 0 Table 3-7 Growth Rate as a Function of BOC Voltage Range Voltage Range Number of Indications for Growth Average BOC Voltage Average Voltage Cycle 20 Growth Average Voltage Growth per EFPY Composite Entire Range 1087 0.380

-0.032

-0.023 Vboc<0.75 1004 0.333

-0.020

-0.015 Vboc>0.75 83 0.950

-0.176

-0.128 SG-A Entire Range 312 0.363

-0.044

-0.032 Vboc<0.75 292 0.321

-0.029

-0.021 Vboc>0.75 20 0.970

-0.265

-0.192 SG-B Entire Range 435 0.382

-0.032

-0.024 Vboc<0.75 403 0.337

-0.027

-0.020 Vboc>0.75 32 0.950

-0.095

-0.069 SG-C Entire Range 340 0.394

-0.021

-0.015 Vboc<0.75 309 0.339

-0.003

-0.002 Vboc>0.75 31 0.937

-0.204

-0.148

3-11 SG-SGMP-18-24 January 2019 Revision 0 Table 3-8 Indications with the Largest Growth in Cycle 20 SG Row Column TSP No.

EOC-19 Volts EOC-20 Volts C20 Growth Volts

+POINT Probe Tested SG-A 15 74 03H 0.18 1.04 0.86 Yes (NDF)

SG-C 15 5

04H 0.59 1.44 0.85 Yes (NDF)

SG-B 9

80 02H 0.36 0.95 0.59 No SG-B 4

48 03H 0.17 0.72 0.55 Yes (NDF)

SG-A 9

57 02H 0.23 0.74 0.51 No SG-A 4

50 03H 0.22 0.7 0.48 No SG-A 6

35 02H 0.72 1.14 0.42 Yes (SAI)

SG-C 22 20 02H 0.27 0.69 0.42 No SG-C 17 48 02H 0.58 1.0 0.42 Yes (NDF)

SG-C 10 72 03H 0.12 0.51 0.39 No SG-C 20 76 03H 0.82 1.17 0.35 Yes (NDF)

SG-C 24 48 03H 0.88 1.22 0.34 Yes (NDF)

SG-A 35 45 02H 0.48 0.8 0.32 No

3-12 SG-SGMP-18-24 January 2019 Revision 0 Figure 3-1 Voltage Distribution in SG A (Measured vs. Predicted) 0 20 40 60 80 100 120 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 Predictedvs.MeasuredVoltageDistributioninSGA 2R20Measured 2R20Predicted

3-13 SG-SGMP-18-24 January 2019 Revision 0 Figure 3-2 Voltage Distribution in SG B (Measured vs. Predicted) 0 20 40 60 80 100 120 140 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 Predictedvs.MeasuredVoltageDistributioninSGB 2R20Measured 2R20Predicted

3-14 SG-SGMP-18-24 January 2019 Revision 0 Figure 3-3 Voltage Distribution in SG C (Measured vs. Predicted) 0 20 40 60 80 100 120 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Predictedvs.MeasuredVoltageDistributioninSGC 2R20Measured 2R20Predicted

200 180 160

"' S 140

-~ 120 "0

C ;: 100 0...

80 cu

.Cl E 60

, z 40 20 0

I I 11

Number of Indications by TSP Number I

I I' I I I I II I I : I I I I I I 02H 03H 04H 0SH 06H 07H 08H 03C 04C 0SC 06C 07C 08C TSP Number Figure 3-4 Number of Measured Bobbin DSI as a Function of TSP SG-SGMP-18-24 3-15 SGA SG B SG C January 2019 Revision 0

3-16 OSI Voltage Growth/EFPY Curve for SG A 0.6

.4- ---------

-1

-0.S 0

0.5 1

2R20 Cumulative Distribution 2R19 Cumulative Distribution 2R20 Bounding Growth Curve Figure 3-5 Voltage Growth / EFPY in SG-A during Cycle 20 SG-SGMP-18-24 January 2019 Revision 0

3-17 OSI Voltage Growth/EFPV Curve for SG B

:::2~----------

2R20 Cumulative Distribution

,6-r-----------

2R19 Cumulative Distribution 2R20 Bounding Growth curve

-0.6

-0.4

-0.2 0

0.2 0.4 0.6 Figure 3-6 Voltage Growth / EFPY in SG-B during Cycle 20 SG-SGMP-18-24 January 2019 Revision 0

-0.8

-0.6 SG-SGMP-18-24 3-18 DSI Voltage Growth/EFPY Curve for SG C 2R19 Cumulative Distribution 2R20 Cumulative Distribution 2R20 Bounding Growth Curve

-0.4

-0.2 0

0.2 0.4 0.6 0.8 Figure 3-7 Voltage Growth / EFPY in SG-C during Cycle 20 January 2019 Revision 0

0 0.1 SG-SGMP-18-24 3-19 Upper 5% of Growth/EFPY for SG A 2R19 Cumulative Growth 2R20 Cumulative Growth 2R20 Bounding Growth Curve 0.2 0.3 0.4 0.5 0.6 0.7 Figure 3-8 Upper 5% of Growth/EFPY for SG-A January 2019 Revision 0

0 0.1 SG-SGMP-18-24 3-20 Upper 5% of Growth/EFPV for SG B 2R19 Cumulative Growth 2R20 Cumulative Growth 2R20 Bounding Growth Curve 0.2 0.3 0.4 0.5 Figure 3-9 Upper 5% of Growth/EFPY for SG-B January 2019 Revision 0

1.01 1

0.99 0.98 0.97 0.96 0.95 0.94 0

SG-SGMP-18-24 3-21 Upper 5% of Growth/EFPY for SG C 2R19 Cumulative Distribution 2R20 Cumulative Distribution 2R20 Bounding Curve 0.2 0.4 0.6 0.8 Figure 3-10 Upper 5% of Growth/EFPY for SG-C January 2019 Revision 0

3-22 SG-SGMP-18-24 January 2019 Revision 0 Figure 3-11 Cycle 20 Voltage Growth vs. BOC Voltage R²=0.1751 1

0.8 0.6 0.4 0.2 0

0.2 0.4 0.6 0.8 1

0 0.2 0.4 0.6 0.8 1

1.2 1.4 1.6 GrowthinVolts BOCVolts Cycle20Growthvs.BOCVolts SGAIndications SGBIndications SGCIndications Trendline

4-1 SG-SGMP-18-24 January 2019 Revision 0 4

DATABASE APPLIED FOR LEAK AND BURST CORRELATIONS 4.1 Tube Material Properties The tube material properties are provided in Table 6-4 of Reference 4 for 7/8-inch diameter tubes. The normalized mean flow stress (sum of yield and ultimate strengths divided by 2) used in the analysis is 68.78 ksi.

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 Westinghouse 7/8-inch tube data. The actual material property values for Beaver Valley Unit 2 are slightly higher than the average of all Westinghouse data. The correlation parameters shown in Table 4-1 are taken from Reference 4.

4.3 Leak Rate Correlation The steam line break pressure to be applied is 2560 psi unless a lower pressure can be justified.

Therefore, the leak correlation for pressure of 2560 psi from Reference 4 is used for the leakage predictions. The parameters are shown in Table 4-2. The leak rate criterion is given in terms of gallons per minute as condensed liquid at room temperature.

4.4 Probability of Leak Correlation The probability of leak as a function of indication voltage is taken from Reference 4. The parameters are shown in Table 4-3. 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.

4.5 NDE Uncertainties The NDE uncertainties applied for the EOC-20 and EOC-21 voltage projections are described in Reference 1. The probe wear uncertainty has a standard deviation of 7% about a mean of zero and has a cut-off 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 cut-off.

These NDE uncertainty distributions are used in the Monte Carlo analysis to predict the burst probabilities and accident leak rates at EOC-20 and EOC-21. The voltages reported were adjusted to account for differences between the laboratory standard and the standard used in the field.

4.6 Upper Voltage Repair Limit Per Table 5.4-20 of Reference 12, the BVPS2 Updated Final Safety Analysis Report (UFSAR),

the pressurizer safety relief valves have a nominal setting of 2485 psig, or the Reactor Coolant System (RCS) design pressure. Applying a 3% allowance for accumulation per Section 2 of to GL 95-05, the applicable SLB conditions pressure differential across the SG tubes is then 2560 psig, which is the traditional pressure differential used for prior GL 95-05

4-2 SG-SGMP-18-24 January 2019 Revision 0 analyses. The upper voltage repair limit of 4.60 volts is based on the structural limit in Table 4-1 for a pressure differential of 2560 psi with a safety factor of 1.4 applied to the differential pressure. The upper voltage repair limit considers the projected voltage growth during the next cycle and NDE uncertainty. The maximum average percentage growth rate as a percentage of BOC voltage values for any steam generator is seen from Table 3-6 to be very small. According to Reference 1, the minimum growth adjustment is 30% per EFPY (43.2% per cycle for the bounding 525 EFPD Cycle 20). Therefore, the specific maximum growth value of 43.2% and 20% for NDE uncertainty was used to estimate the upper voltage repair limit. This results in an upper voltage repair limit of 7.51 / (1 + 0.432 + 0.20) = 4.60 volts. No indications greater than this voltage were left in service; the largest DSI voltage reported at 2R20 was 1.46 volts.

The analysis takes no credit for power operated relief valve (PORV) actuation even though the PORVs, block valves, and associated testing programs have been shown to satisfy the requirements of GL 90-06, as indicated in the NRC Safety Evaluation Report dated May 15, 1995. Crediting the PORVs would effectively increase the upper voltage repair limit by limiting the maximum pressure differential during a postulated SLB event and would reduce the calculated SLB conditions by limiting the maximum pressure differential.

Considering the inspection history of the BVPS2 SGs, it is unlikely that a bobbin coil DSI voltage of >4.5 volts will be observed within the BVPS2 SGs.

4-3 SG-SGMP-18-24 January 2019 Revision 0 Table 4-1 7/8-Inch Tube Burst Pressure vs. Bobbin Amplitude Correlation

)

log(

1 0

Volts a

a PB

Parameter Addendum 7 Database Value Intercept, a0 7.4801 Slope, a1

-2.4002 Index of Deter., r 2

79.67%

Std. Deviation, Error 0.8802 Mean of Log(V) 0.3111 SS of Log(V) 51.6595 N (data pairs) 100 Str. Limit (2560 psi) (1) 7.51V Str. Limit (2405 psi) 9.40V p Value for a1 (2) 5.60*10-36 Reference f 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.

(4) Reference is Table 6-4 from Reference 4.

4-4 SG-SGMP-18-24 January 2019 Revision 0 Table 4-2 Tube Leak Rate vs. Bobbin Amplitude Correlation Parameters

Volts b

b Q

log 4

3 10

Parameter Addendum 7 Database Value SLB P = 2560 psi Intercept, b3

-0.33476 Slope, b4 0.95311 Index of Determination, r2 12.4%

Residuals, Error (b5) 0.8175 Mean of Log(Q) 0.7014 SS of Log(Q) 22.8754 p Value for b4 2.4%

SLB P = 2405 psi Intercept, b3

-0.8039 Slope, b4 1.2077 Index of Determination, r2 20.0%

Residuals, Error (b5) 0.7774 Mean of Log(Q) 0.5090 SS of Log(Q) 22.6667 p Value for b4 0.5%

Common Data Data Pairs, N 32 Mean of Log(V) 1.0871 SS of Log(V) 3.1116 Notes: (1) Reference is Table 6-6 from Reference 4.

4-5 SG-SGMP-18-24 January 2019 Revision 0 Table 4-3 7/8-Inch Tube Probability of Leak Correlation Parameters

)

log(

2 1

1 1

)

Pr(

Volts b

b e

Leak

Parameter Addendum 7 Database Value Logistic Intercept, b1

-4.9847 Logistic Slope, b2 7.6110 Intercept Variance, V11 (1) 1.2904 Covariance, V12

-1.7499 Slope Variance, V22 2.8181 Number of Data, N 120 Deviance 33.66 Pearson SD 62.9%

MSE 0.285 Note:

(1) Parameters Vij are the elements of the covariance matrix of the coefficients, i, of the regression equation.

(2) Reference is Table 6-5 from Reference 4.

I I

I

5-1 SG-SGMP-18-24 January 2019 Revision 0 5

SLB ANALYSIS METHODS A Monte Carlo analysis technique is used to calculate the SLB leak rates and tube burst probabilities for both actual 2R20 and projected EOC-21 voltage distributions. The Monte Carlo analysis accounts for parameter uncertainty. The analysis methodology is described in the Westinghouse generic methods report of Reference 4 as supplemented by References 5 and 6. The Monte Carlo computer program used to implement this method is documented in Reference 9. Essentially the same methodology was applied to leak and burst analyses performed for the original Beaver Valley Unit 1 SGs, Reference 10.

In general, the methodology involves application of correlations for burst pressure, probability of leakage and leak rate to a measured or calculated EOC voltage distribution to estimate the likelihood of tube burst and primary-to-secondary leakage during a postulated SLB event.

Uncertainties associated with burst pressure, leak rate probability and leak rate correlation parameters are explicitly included by sampling distributions for the parameter uncertainties through the Monte Carlo sampling process. NDE uncertainties are also included. The voltage distributions used in the leak and burst projections for the next operating cycle are obtained by applying growth data to the BOC distribution. The probability of detection (POD) used to generate the BOC voltage distributions considers both detection uncertainty and the likely occurrence of new indications.

Comparisons of projected EOC voltage distributions with actual distributions after a cycle of operation for a number of plants have shown that the Monte Carlo analysis technique yields conservative estimates for EOC voltage distribution as well as leak and burst results based on those distributions.

6-1 SG-SGMP-18-24 January 2019 Revision 0 6

BOBBIN VOLTAGE DISTRIBUTIONS This section describes the input data used to calculate EOC bobbin voltage distributions and presents results of calculations to project EOC-21 voltage distributions.

6.1 Calculation of Voltage Distributions The analysis for EOC-21 voltage distribution starts with an initial voltage distribution which is projected to the end-of-cycle conditions based on the growth rate and the anticipated cycle operating duration. The number of indications assumed in the analysis to project EOC voltage distributions, SLB leak rates and tube burst probabilities is obtained by adjusting the number of reported indications using a POD, which accounts for both the detection uncertainty and the development of new indications over the projection period. This is accomplished by using a probability of detection (POD) factor, which is defined as the ratio of the actual number of indications detected to total number of indications present. A conservative value is assigned to POD based on historical data, and the value used herein is discussed in Section 6.2. The calculation of projected bobbin voltage frequency distribution is based on a net total number of indications returned to service, defined as follows.

NTot RTS = Ni / POD - Nrepaired + Ndeplugged

where, NTot RTS

= Number of bobbin indications being returned to service for the next cycle, Ni

=

Number of bobbin indications (in tubes in service) identified by inspection after the previous cycle, POD =

Probability of detection, Nrepaired

= Number of Ni which are repaired (plugged) after the last cycle, Ndeplugged

= Number of indications in tubes deplugged after the last cycle and returned to service in accordance with voltage-based repair criteria.

There are no deplugged tubes returned to service at the beginning of Cycle 21 (BOC-21); therefore, Ndeplugged = 0. One (1) tube with one (1) indication at a TSP was plugged, therefore, Nrepaired = 1. The tube was plugged for reasons other than the presence of the DSI signal. 2R20 RPC no degradation found (NDF) indications were included in establishing the BOC-21 indication distributions shown in Table 6-1. During the Monte Carlo simulations, voltages for bins with several indications are selected by randomly sampling the voltage bins. For a few higher voltage indications in each SG, each indication is considered to be in a separate bin, and the actual indication voltage is utilized in the calculations.

6-2 SG-SGMP-18-24 January 2019 Revision 0 The methodology used in the projection of EOC-21 bobbin voltage frequency distributions is described in Reference 3, and it is essentially the same as that used in the original Beaver Valley Unit 1 SGs, Reference 10.

6.2 Probability of Detection (POD)

The Generic Letter 95-05 (Reference 1) requires the application of a constant POD value of 0.6 to define the BOC distribution for EOC voltage projections unless an alternate POD is approved by the NRC. A POD value of 1.0 represents the ideal situation where all indications are detected. In this report, the Reference 1 POD value of 0.6 is used for the EOC-21 projection.

6.3 Limiting Growth Rate Distribution As discussed in Section 3.2, the NRC guidelines in Generic Letter 95-05 stipulate that the more conservative growth rate distributions from the past two inspections should be utilized for projecting EOC distributions for the next cycle. For conservatism, a growth rate curve which bounded the growth rates of both cycles was used (Figure 3-5, Figure 3-6 and Figure 3-7).

Growth distributions used in the Monte Carlo calculations are specified in the form of a histogram, so no interpolation is performed between growth bins. This assures that the largest growth value in the distribution is utilized in the Monte Carlo simulations.

6.4 Cycle Operating Period The operating periods used in the growth rate/EFPY calculations and voltage projections are as follows.

Cycle 20 502.9 EFPD or 1.377 EFPY (actual)

Cycle 21*

515 EFPD or 1.410 EFPY (projected)

A conservative cycle length of 525 EFPD is applied in the Monte Carlo simulations for calculation of leak rate and burst probability.

6.5 Projected EOC-21 Voltage Distribution Calculations for the EOC-21 bobbin voltage projections were performed for all three SGs based on the 2R20 distributions shown in Table 6-1. The BOC-21 distributions were adjusted to account for probability of detection as described above, and the adjusted number of indications at BOC-21 is also shown in Table 6-1. Calculations were performed using a constant POD of 0.6 and 1,000,000 Monte Carlo trials. The distribution of indications at BOC-21 and the distribution of indications projected to EOC-21 are shown in Figure 6-1, Figure 6-2 and Figure 6-3 for SG-A, SG-B and SG-C, respectively. SG-B has the largest number of indications at BOC-21. Reporting the maximum predicted voltage is not required by GL 95-05, but it is arbitrarily chosen to be the voltage where the integration of the upper tail of the voltage distribution reaches a 0.3 fractional indication.

6-3 SG-SGMP-18-24 January 2019 Revision 0 Table 6-1 Predicted Voltage Distribution at EOC-21 SG-A Number of Indications SG-B Number of Indications SG-C Number of Indications Volt Bins Measured Input Predicted Measured Input Predicted Measured Input Predicted EOC-20 BOC-21 EOC-21 EOC-20 BOC-21 EOC-21 EOC-20 BOC-21 EOC-21 0.1 20 33.33 23.59 18 30.0 21.82 13 21.67 15.6 0.2 95 158.33 106.22 104 173.33 115.36 68 113.33 77.14 0.3 96 160.0 136.64 115 190.67 156.76 90 150.0 118.0 0.4 67 111.67 116.34 69 115.0 133.65 62 103.33 110.58 0.5 26 43.33 74.13 59 98.33 107.55 56 93.33 93.38 0.6 18 30.0 43.95 36 60.0 77.42 29 48.33 68.39 0.7 7

11.67 26.46 15 25.0 48.61 25 41.67 46.91 0.8 7

11.67 17.4 11 18.33 29.87 7

11.67 29.04 0.9 5

8.33 12.58 7

11.67 19.35 4

6.67 16.96 1.0 3

5.0 8.5 7

11.67 13.2 3

5.0 9.98 1.1 1

1.67 5.38 4

6.67 8.91 1

1.67 6.17 1.2 2

3.33 3.29 1

1.67 5.84 1

1.67 4.35 1.3 0

0 2.04 2

3.33 3.77 3

5.0 3.36 1.4 0

0 1.29 1

1.67 2.36 1

1.67 2.56 1.5 1

1.67 0.86 0

0 1.39 1

1.67 1.78 1.6 0

0 0.35 0

0 0.46 0

0 1.12 1.7 0

0 0

0.7 0

0 0.37 1.8 0

0 0.7 0

0 0

0 1.9 0

0 0.3 0

0 0.7 2.0 0

0 0

0 0.3 Total 384 580 580 449 747.33 747.33 364 606.67 606.67

6-4 SG-SGMP-18-24 January 2019 Revision 0 Figure 6-1 SG-A Predicted Voltage Distribution at EOC-21 0

20 40 60 80 100 120 140 160 180 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2

NumberofIndications VoltageBin Cycle21SGAPredictedVoltageDistribution BOC21VoltageDistribution EOC21VoltageDistribution I I I I I I II

111111, 111111,

6-5 SG-SGMP-18-24 January 2019 Revision 0 Figure 6-2 SG-B Predicted Voltage Distribution at EOC-21 0

50 100 150 200 250 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2

NumberofIndications VoltageBin Cycle21SGBPredictedVoltageDistribution BOC21VoltageDistribution EOC21VoltageDistribution

6-6 SG-SGMP-18-24 January 2019 Revision 0 Figure 6-3 SG-C Predicted Voltage Distribution at EOC-21 0

20 40 60 80 100 120 140 160 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2

NumberofIndications VoltageBin Cycle21SGCPredictedVoltageDistribution BOC21VoltageDistribution EOC21VoltageDistribution

-n II 111 111 P 11111

1111111,

7-1 SG-SGMP-18-24 January 2019 Revision 0 7

SLB LEAK RATE AND TUBE BURST PROBABILITY ANALYSES This section presents the results of the analyses carried out to predict leak rates and tube burst probabilities at the postulated SLB conditions using the actual voltage distributions from the 2R20 inspection (condition monitoring assessment) as well as for the projected EOC-21 voltage distributions (operational assessment). The methodology used in these analyses is described in Section 6.

7.1 2R20 Condition Monitoring Leak Rate and Tube Burst Probability Analyses to calculate the 2R20 SLB leak rates and tube burst probabilities were performed using the actual bobbin voltage distributions presented in Table 3-2, Table 3-3 and Table 3-4. The results of the Monte Carlo calculations are summarized in Table 7-1, in addition to the 2R20 predictions from the EOC-19 OA performed in Reference 2. As evident from the results in Table 7-1, the methodology utilized for the OA is conservative in the prediction of the number and size of indications by the end of the following operating cycle. As a result, the OA produces conservative results for leak rate and burst probability by the end of the next operating cycle.

The SLB leak rates and tube burst probabilities, calculated using the actual measured 2R20 voltage distributions using 1,000,000 Monte Carlo trials, are shown in Table 7-1. The methodology used for these calculations is documented in WCAP-14277, Revision 1. The probability of leak, leak rate, and burst pressure correlations for 7/8-inch tubes presented in the latest addendum to the EPRI Alternate Repair Criteria (ARC) Database, Reference 4, were used.

The SLB primary-to-secondary pressure differential applied in the analysis is 2560 psi. The maximum 2R20 leak rate of 0.0587 gpm and the maximum conditional burst probability of 1.57 x 10-5 are well below their respective allowable limits (2.2 gpm per Reference 11, and 1.0 x 10-2 per Reference 1, respectively). Therefore, the condition monitoring performance criteria are satisfied.

7.2 Cycle 21 Operational Assessment Leak Rate and Tube Burst Probability The SLB leak rate and tube burst probability projection for the Cycle 21 Operational Assessment was carried out using the latest update to the ARC database documented in Reference 4, the POD of 0.60, and 1,000,000 Monte Carlo trials. The EOC-21 leak and burst analyses were performed using a primary-to-secondary pressure differential of 2560 psi, even though it is likely that PORV actuation will occur prior to the pressurizer safety relief valve lift setting.

The EOC-21 projections, considering a 525 EFPD operation cycle and using POD = 0.6 are shown in Table 7-2. Both the maximum projected EOC-21 leak rate of 0.166 gpm and the maximum conditional burst probability of 2.43 x 10-5 are well below their respective allowable limits (2.2 gpm and 1.0 x 10-2, respectively). Therefore, the Operational Assessment performance criteria for the DSI indications are satisfied for Cycle 21.

7-2 SG-SGMP-18-24 January 2019 Revision 0 Table 7-1 Condition Monitoring Leak and Burst Results for 2R20 SG OA Performed at EOC-19 EOC-20 Actual OA Performed at EOC-19 EOC-20 Actual Predicted Number of Indications at EOC-20 Predicted Max.

Voltage Actual Number of Indications at EOC-20 Actual Max.

Voltage Predicted SLB Leak Rate at 95/95 (gpm)

Predicted Probability of Burst at 95%

Confidence Actual SLB Leak Rate at 95/95 (gpm)

Actual Probability of Burst at 95%

Confidence A

526 2.0 348 1.46 0.149 2.31x10-5 0.0283 6.30x10-6 B

725 2.0 449 1.40 0.220 2.67x10-5 0.0587 9.16x10-6 C

571 1.9 364 1.44 0.158 2.31x10-5 0.0526 1.57x10-5 Table 7-2 Operational Assessment Leak and Burst Results for EOC-21 (POD = 0.6)

SG Growth Rate Used in Projection Number of Indications at EOC-21 Maximum Volts at EOC-21 SLB Leak Rate at 95/95 (gpm)

Probability of Burst at 95%

Confidence SG-A Cycle 20 Bound 580 1.9 0.096 1.44x10-5 SG-B Cycle 20 Bound 748 1.9 0.166 1.82x10-5 SG-C Cycle 20 Bound 607 2.0 0.153 2.43x10-5 Note: The growth rate used for the OA of each SG bounds both Cycles 19 and 20 growth rates.

8-1 SG-SGMP-18-24 January 2019 Revision 0 8

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.

Westinghouse Report SG-SGMP-17-21, Rev. 0, Beaver Valley Unit 2 End-of-Cycle 19 Analysis and Prediction for End-of-Cycle 20 Voltage-Based Repair Criteria 90-Day Report, July 2017.

3.

Westinghouse Report 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.

EPRI Report 1018047, Addendum 7 to NP-7480-L Database, Steam Generator Tubing Outside Diameter Stress Corrosion Cracking at Tube Support Plates Database for Alternate Repair Limits, September 2008.

5.

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.

6.

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.

7.

Westinghouse Letter DLC-96-184, Duquesne Light Company Beaver Valley Power Station Unit 2 Steam Generator LOCA Plus SSE Loads, June 17, 1996.

8.

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

9.

Westinghouse Letter LTR-CDME-08-167, Software Release Letter for CycleSim Version 3.2, July 2008.

10. Westinghouse Report SG-SGDA-05-1, Rev. 1, Beaver Valley Unit 1 Cycle 17 Voltage-Based Repair Criteria 90-Day Report, January 2005.

11. FENOC Letter BVTS-0109, 2R16 Steam Generator 90 Day Alternate Repair Criteria Report Input Data Validation, January 2, 2013. (Attached in EDMS)

12. Beaver Valley Power Station Unit 2, Updated Final Safety Analysis Report, Revision 23.

13. FENOC Procedure ISIE1-8, Revision 18, Beaver Valley Power Station Unit 2 Steam Generator Examination Guidelines, October 8, 2018. (Attached in EDMS)

8-1 SG-SGMP-18-24 January 2019 Revision 0

14. Steam Generator Management Program: Pressurized Water Reactor Steam Generator Examination Guidelines, Revision 8. EPRI, Palo Alto, CA: 2016. 3002007572.

A-1 SG-SGMP-18-24 January 2019 Revision 0 APPENDIX A Table A-1 SG-A 2R20 DSI Indications SG Row Col Locn 2R20 Volts Comment 2A 2

24 07H 0.32 2A 2

88 02H 0.21 2A 3

15 03H 0.31 2A 3

59 02H 0.46 2A 3

65 07H 0.72 2A 3

77 08H 0.43 SAI 2A 3

79 07H 0.44 2A 3

81 03H 0.56 2A 3

84 03H 0.5 2A 3

85 04H 0.66 2A 3

92 02H 0.19 2A 4

9 03H 0.9 2A 4

9 04H 0.2 2A 4

18 05H 0.34 2A 4

21 03H 0.35 2A 4

24 02H 0.25 2A 4

26 02H 0.23 2A 4

28 03H 0.54 2A 4

34 03H 0.4 2A 4

39 02H 0.06 2A 4

50 02H 0.28 2A 4

50 03H 0.7 2A 4

50 04H 0.39 2A 4

54 02H 0.3 2A 4

54 04H 0.31 2A 4

54 05H 0.37 2A 4

60 02H 0.26 2A 4

60 06H 0.32 2A 4

63 02H 0.34 2A 4

70 03H 0.18 2A 4

78 05H 0.22 2A 4

85 08C 0.11 2A 4

86 03H 0.19 2A 5

10 02H 0.72 2A 5

10 03H 0.85 2A 5

10 04H 0.46

A-2 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2A 5

11 04H 0.31 2A 5

18 06H 0.51 SAI 2A 5

25 05H 0.56 2A 5

26 02H 0.51 2A 5

26 03H 0.32 2A 5

28 04H 1.46 NDF 2A 5

29 02H 1.18 SAI 2A 5

30 03H 0.15 2A 5

53 02H 0.57 2A 5

80 05H 0.17 2A 5

82 03H 0.27 2A 6

15 02H 0.34 2A 6

20 04H 0.36 2A 6

27 06H 0.24 2A 6

32 02H 0.21 2A 6

34 02H 0.56 2A 6

35 02H 1.14 SAI 2A 6

35 03H 0.31 2A 6

35 05H 0.47 2A 6

35 08H 0.42 NDF 2A 6

40 03H 0.26 2A 6

40 04H 0.29 2A 6

41 08H 0.25 SAI 2A 6

43 02H 0.3 2A 7

14 03H 0.23 2A 7

18 02H 0.26 2A 7

18 03H 0.35 2A 7

18 05H 0.34 2A 7

19 02H 0.46 2A 7

19 03H 0.44 2A 7

27 05H 0.42 2A 7

49 02H 0.17 2A 7

51 02H 0.2 2A 7

51 05H 0.53 2A 7

94 02H 0.2 2A 8

19 02H 0.39 2A 8

28 02H 0.26 2A 8

29 02H 0.26 2A 8

32 03H 0.33

A-3 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2A 8

32 05H 0.34 SAI 2A 8

34 03H 0.88 2A 8

42 02H 0.15 2A 8

67 02H 0.25 2A 8

69 02H 0.26 2A 8

76 05H 0.18 2A 8

85 02H 0.07 2A 8

91 04H 0.28 2A 9

10 02H 0.91 2A 9

13 02H 0.27 2A 9

14 03H 0.13 2A 9

16 02H 0.41 2A 9

16 03H 0.42 2A 9

16 04H 0.44 2A 9

18 05H 0.3 2A 9

34 02H 0.27 SAI 2A 9

35 02H 0.35 2A 9

38 05H 0.6 2A 9

40 03H 0.35 2A 9

51 04H 0.52 SAI 2A 9

56 02H 0.2 2A 9

56 04H 0.23 2A 9

57 02H 0.74 2A 9

57 03H 0.31 2A 9

74 03H 0.21 2A 10 7

02H 0.38 2A 10 7

03H 0.32 2A 10 8

03H 0.26 2A 10 19 04H 0.25 2A 10 26 04H 0.12 2A 10 34 04H 0.77 SAI 2A 10 37 03H 0.1 2A 10 58 04H 0.17 2A 11 2

03H 0.68 2A 11 48 02H 0.69 2A 11 48 08H 0.35 2A 11 77 05H 0.39 2A 11 78 05H 0.15 2A 11 78 06H 0.21

A-4 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2A 12 16 02H 0.47 SAI 2A 12 34 02H 0.26 2A 12 48 05H 0.28 2A 12 69 02H 0.33 2A 12 69 03H 0.23 2A 12 70 03H 0.28 2A 12 72 02H 0.31 2A 12 73 05H 0.16 2A 12 74 02H 0.32 2A 12 74 03H 0.51 2A 12 80 05H 0.13 2A 13 32 02H 0.1 2A 13 39 05H 0.39 2A 13 49 04H 0.17 2A 13 60 02H 0.37 2A 13 65 06C 0.13 2A 13 67 06C 0.24 2A 13 71 04H 0.17 2A 13 80 03H 0.45 2A 13 84 02H 0.39 2A 13 85 02H 0.33 2A 13 86 03H 0.25 2A 13 91 05H 0.79 2A 13 92 04H 0.5 2A 14 15 04H 0.26 2A 14 20 03H 0.25 NDF 2A 14 25 05H 0.18 2A 14 27 05H 0.45 2A 14 31 02H 0.1 2A 14 40 05H 0.2 SAI 2A 14 48 05H 0.39 2A 14 50 03H 0.21 2A 14 53 02H 0.11 2A 14 54 02H 0.25 2A 14 58 02H 0.31 2A 14 59 02H 0.09 2A 14 59 03H 0.2 2A 14 59 06H 0.42 2A 14 65 03H 0.36

A-5 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2A 14 68 02H 0.31 2A 14 70 02H 0.34 2A 14 70 03H 0.75 2A 14 72 06H 0.1 2A 14 80 03H 0.2 2A 14 86 04H 0.28 2A 15 27 05H 0.17 2A 15 31 04H 0.3 SAI 2A 15 63 02H 0.12 2A 15 67 02H 0.27 2A 15 71 02H 0.11 2A 15 72 02H 0.15 2A 15 73 03H 0.57 2A 15 73 05H 0.17 2A 15 74 03H 1.04 NDF 2A 15 75 02H 0.63 2A 15 75 08H 0.39 SAI 2A 16 11 05H 0.23 SAI 2A 16 50 05C 0.22 2A 16 52 02H 0.55 2A 16 53 03H 0.17 2A 16 60 02H 0.13 2A 16 62 08H 0.06 2A 16 66 03H 0.16 2A 16 70 03H 0.31 2A 16 72 02H 0.11 2A 16 76 02H 0.32 2A 16 77 05H 0.2 2A 17 10 03H 0.33 2A 17 27 04H 0.12 2A 17 32 05H 0.25 2A 17 46 02H 0.54 2A 17 59 02H 0.26 2A 17 59 05H 0.22 2A 17 81 03H 0.1 2A 17 81 04H 0.17 2A 17 84 03H 0.11 2A 18 7

04H 0.25 2A 18 10 03H 0.6

A-6 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2A 18 10 04H 0.21 2A 18 27 07H 0.13 2A 18 30 04H 0.08 2A 18 47 02H 0.24 2A 18 47 05H 0.38 2A 18 57 02H 0.45 2A 18 58 02H 0.56 2A 18 88 05H 0.11 2A 19 7

02H 0.35 2A 19 7

03H 0.31 SAI 2A 19 8

03H 0.22 2A 19 15 03H 0.21 2A 19 15 04H 0.19 2A 19 56 03H 0.47 2A 19 57 02H 0.44 2A 19 57 04H 0.18 2A 19 60 02H 0.15 2A 20 7

08C 0.09 2A 20 9

03H 0.18 2A 20 10 04H 0.2 2A 20 12 02H 0.1 2A 20 22 02H 0.3 2A 20 22 03H 0.18 2A 20 22 08H 0.22 2A 20 57 02H 0.13 2A 20 62 05H 0.4 2A 20 72 07C 0.22 NDF 2A 20 75 05H 0.35 2A 20 78 04H 0.14 2A 20 85 03H 0.29 2A 21 18 04H 0.41 2A 21 25 03H 0.19 2A 21 26 05H 0.35 2A 21 34 02H 0.41 2A 21 43 02H 0.28 2A 21 46 02H 0.17 2A 21 55 02H 0.05 2A 21 61 08H 0.14 2A 21 72 03H 0.3

A-7 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2A 21 73 03H 0.9 2A 21 78 08H 0.14 2A 21 87 08C 0.11 2A 22 7

02H 0.2 2A 22 21 02H 0.12 2A 22 21 03H 0.39 2A 22 23 02H 0.25 2A 22 24 02H 0.27 2A 22 25 02H 0.17 2A 23 11 02H 0.39 2A 23 11 03H 0.15 2A 23 19 02H 0.67 2A 23 20 02H 0.22 2A 23 21 03H 0.2 2A 23 52 03H 0.29 2A 23 53 02H 0.2 SAI 2A 23 87 04H 0.33 2A 24 16 02H 0.39 2A 24 16 03H 0.15 2A 24 23 05H 0.83 2A 24 24 02H 0.11 2A 24 33 03H 0.21 2A 24 39 02H 0.22 2A 24 52 02H 0.2 2A 24 63 05H 0.42 2A 24 80 03H 0.19 2A 25 21 02H 0.06 2A 25 22 02H 0.42 2A 25 30 04H 0.32 2A 25 30 06H 0.1 2A 25 50 08H 0.14 2A 26 15 03H 0.17 2A 26 19 04H 0.14 2A 26 42 02H 0.33 2A 26 80 05H 0.11 2A 27 32 02H 0.21 2A 27 33 03H 0.43 2A 27 34 04H 0.21 2A 27 42 04H 0.2 SAI

A-8 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2A 27 42 05H 0.27 2A 27 47 02H 0.28 2A 27 64 02H 0.22 2A 27 75 05H 0.28 2A 28 13 03H 0.33 2A 28 26 04H 0.26 2A 28 41 02H 0.2 2A 28 45 02H 0.26 2A 28 46 03H 0.1 2A 28 54 02H 0.17 2A 28 56 03H 0.6 2A 28 66 04H 0.15 SAI 2A 29 24 02H 0.19 2A 29 24 04H 0.14 2A 29 30 05H 0.32 2A 29 54 03H 0.21 SAI 2A 29 65 02H 0.1 2A 30 22 02H 0.21 2A 30 28 03H 0.23 2A 30 38 02H 0.2 2A 30 51 08C 0.24 2A 30 58 04H 0.09 2A 30 63 08H 0.17 2A 30 68 02H 0.24 2A 31 14 04H 0.31 2A 31 18 02H 0.63 2A 31 18 03H 0.31 2A 31 74 02H 0.39 SAI 2A 32 22 02H 0.16 2A 32 27 03H 0.56 2A 32 35 06H 0.1 2A 32 38 02H 0.16 2A 32 38 03H 0.25 2A 32 45 02H 0.39 2A 32 51 05H 0.16 2A 32 53 03H 0.21 2A 33 18 02H 0.13 2A 33 18 03H 0.29 2A 33 22 02H 0.23

A-9 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2A 33 27 06H 0.26 2A 33 42 05H 0.25 2A 33 45 07H 0.21 2A 33 54 06H 0.23 2A 33 57 04H 0.25 2A 33 66 02H 0.3 2A 34 24 03H 0.11 2A 34 40 03H 0.21 2A 34 52 02H 0.3 2A 34 53 02H 0.26 2A 34 56 05H 0.28 2A 35 45 02H 0.8 2A 36 28 03H 0.38 2A 36 28 04H 0.1 2A 36 44 03H 0.27 2A 36 46 06H 0.19 2A 37 30 08H 0.16 2A 37 39 02H 0.18 2A 37 39 03H 0.2 2A 37 42 03H 0.28 2A 37 54 05H 0.13 2A 37 56 02H 0.15 2A 37 56 03H 0.38 2A 38 40 05H 0.32 2A 38 44 02H 0.19 2A 39 23 02H 0.98 2A 39 42 02H 0.38 2A 39 46 02H 0.34 2A 39 47 02H 0.27 2A 40 29 02H 0.11 2A 40 37 03H 0.99 2A 40 44 06C 0.13 2A 41 27 03H 0.11 2A 42 64 04H 0.26 2A 44 35 03H 0.18 2A 44 40 05C 0.18 2A 44 58 06H 0.14 2A 46 52 06H 0.23

A-10 SG-SGMP-18-24 January 2019 Revision 0 Table A-2 SG-B 2R20 DSI Indications SG Row Col Locn 2R20 Volts Comment 2B 1

43 02H 0.4 2B 1

52 02H 0.26 2B 1

56 02H 0.22 2B 1

57 04H 0.23 2B 2

15 03H 0.68 SAI 2B 2

24 02H 0.26 Plugged 2B 2

28 02H 0.26 2B 2

54 04H 0.12 2B 2

63 04H 0.15 2B 2

65 03H 0.27 2B 2

67 06H 0.54 2B 2

70 05H 0.74 2B 2

73 03H 0.38 2B 2

73 04H 0.18 2B 2

94 04H 0.39 2B 3

31 02H 0.63 2B 3

32 03H 0.19 2B 3

54 02H 0.56 2B 3

55 02H 0.78 2B 3

58 03H 0.28 2B 3

60 02H 0.46 2B 3

60 03H 0.49 2B 3

61 06H 0.61 2B 3

62 03H 0.4 2B 3

62 04H 0.18 2B 3

63 02H 0.47 2B 3

63 03H 0.45 2B 3

72 03H 0.41 2B 3

88 04H 0.43 2B 3

89 04H 0.41 2B 4

23 02H 0.29 2B 4

23 06H 0.31 2B 4

32 03H 0.22 2B 4

36 04H 0.48 SAI 2B 4

41 04H 0.17 2B 4

43 02H 0.12 2B 4

44 02H 0.24

A-11 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 4

48 03H 0.72 NDF 2B 4

52 03H 0.81 2B 4

54 02H 0.81 2B 4

56 04H 0.4 2B 4

57 02H 0.28 2B 4

57 04H 0.24 2B 4

58 02H 0.47 2B 4

59 02H 0.25 2B 4

59 03H 0.23 2B 4

62 03H 0.21 2B 4

62 07H 0.32 2B 4

63 04H 0.26 2B 5

10 02H 0.41 2B 5

12 03H 0.17 2B 5

14 03H 0.45 2B 5

20 03H 0.43 2B 5

22 04H 0.72 2B 5

28 02H 0.42 2B 5

52 02H 0.94 2B 5

54 02H 0.51 2B 5

54 03H 0.27 2B 5

54 07C 0.54 2B 5

56 03H 0.95 2B 5

58 02H 0.28 2B 5

60 02H 0.42 2B 5

62 03H 0.28 2B 5

63 04H 0.17 2B 5

64 02H 0.33 2B 5

64 03H 0.18 2B 5

68 02H 0.29 2B 5

71 02H 0.47 2B 5

71 06C 0.33 2B 5

73 02H 0.32 2B 5

73 04H 0.16 2B 5

75 03H 0.21 2B 5

75 04H 0.25 2B 5

81 05H 0.13 2B 5

92 02H 0.24 2B 5

93 03H 0.31

A-12 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 6

16 03H 0.18 2B 6

23 04H 0.23 2B 6

26 02H 0.18 2B 6

27 03H 0.25 SAI 2B 6

52 02H 0.16 2B 6

53 02H 0.52 2B 6

53 03H 0.41 2B 6

58 02H 0.56 2B 6

58 03H 0.24 2B 6

61 08H 0.13 2B 6

63 02H 0.19 2B 6

66 03H 0.72 2B 6

70 05H 0.75 2B 7

52 02H 0.66 2B 7

54 02H 0.38 2B 7

56 02H 1.21 NDF 2B 7

56 06C 0.55 2B 7

63 07H 0.27 2B 7

70 04H 0.45 2B 7

70 05H 0.28 2B 7

75 02H 0.16 2B 8

2 03H 0.4 2B 8

9 02H 0.21 2B 8

9 03H 0.22 2B 8

18 02H 0.24 2B 8

18 03H 0.31 2B 8

20 02H 0.35 2B 8

22 02H 0.38 2B 8

37 03H 0.27 2B 8

53 02H 0.47 2B 8

56 03H 0.49 2B 8

57 08H 0.19 2B 8

59 02H 0.16 2B 8

59 05H 0.15 2B 8

63 04H 0.34 2B 9

4 03H 0.45 SAI 2B 9

5 03H 0.16 2B 9

8 03H 0.2 2B 9

11 02H 0.42

A-13 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 9

11 03H 0.46 2B 9

16 03H 0.1 2B 9

17 02H 0.41 2B 9

17 03H 0.31 2B 9

18 02H 0.59 2B 9

18 03H 0.53 2B 9

26 02H 0.27 2B 9

26 03H 0.62 2B 9

52 02H 0.18 2B 9

52 03H 0.3 2B 9

59 03H 0.68 2B 9

59 05H 0.32 2B 9

61 07C 0.49 2B 9

64 04H 0.41 SAI 2B 9

70 03H 0.15 2B 9

70 05H 0.5 2B 9

72 04H 0.32 2B 9

77 04H 0.19 2B 9

80 02H 0.95 2B 9

85 02H 1.03 NDF 2B 9

92 02H 0.33 2B 9

93 02H 0.48 2B 10 6

02H 0.49 2B 10 10 02H 0.02 2B 10 14 02H 0.35 2B 10 15 02H 0.35 2B 10 17 02H 0.81 2B 10 18 02H 0.24 2B 10 26 02H 0.25 2B 10 37 03H 0.25 2B 10 41 07H 0.12 2B 10 50 02H 0.28 2B 10 50 03H 0.17 2B 10 50 04H 0.17 2B 10 52 02H 1.27 NDF 2B 10 52 04H 0.47 2B 10 53 02H 0.43 2B 10 54 02H 0.1 2B 10 56 02H 0.39

A-14 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 10 58 05H 0.13 2B 10 63 02H 0.57 2B 10 71 05H 0.68 2B 10 76 03H 0.27 SAI 2B 10 78 04H 0.3 2B 10 80 03H 0.2 2B 10 82 03H 0.21 2B 10 88 04C 0.12 2B 10 89 02H 0.3 2B 11 8

03H 0.22 2B 11 8

04H 0.16 2B 11 9

06H 0.08 2B 11 9

07H 0.61 NDF 2B 11 18 02H 0.45 2B 11 20 02H 0.56 2B 11 21 03H 0.33 2B 11 25 03H 0.33 SAI 2B 11 35 02H 0.04 2B 11 42 03H 0.09 2B 11 51 02H 0.08 2B 11 53 02H 0.49 2B 11 53 08C 0.41 2B 11 57 03H 0.27 2B 11 58 03H 0.24 2B 11 58 04H 0.21 2B 11 61 02H 0.92 2B 11 61 03H 0.93 2B 11 64 03H 0.37 2B 11 75 02H 0.5 2B 11 75 03H 0.17 2B 11 83 03H 0.31 2B 11 83 04H 0.24 2B 12 10 02H 0.38 2B 12 15 02H 0.4 2B 12 15 03H 0.57 2B 12 16 03H 0.26 2B 12 22 02H 0.54 2B 12 24 02H 0.5 2B 12 24 04H 0.29

A-15 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 12 51 02H 0.12 2B 12 52 02H 0.55 2B 12 52 03H 0.57 2B 12 61 03H 0.66 2B 13 37 03H 0.3 2B 13 39 07H 0.12 2B 13 47 02H 0.19 SAI 2B 13 53 02H 0.64 2B 13 56 03H 0.23 2B 13 56 03H 0.23 2B 13 71 05C 0.24 2B 13 73 02H 0.22 2B 13 77 03H 0.38 2B 13 78 02H 0.12 2B 13 85 02H 0.33 2B 13 86 02H 0.18 2B 13 91 02H 0.45 2B 14 13 02H 0.29 2B 14 15 03H 0.35 2B 14 18 02H 0.35 2B 14 25 02H 0.47 2B 14 27 03H 0.18 2B 14 28 05H 0.14 2B 14 32 02H 0.35 2B 14 35 06H 0.19 2B 14 36 03H 0.29 2B 14 39 02H 0.04 2B 14 54 02H 0.73 2B 14 54 03H 0.43 2B 14 57 02H 0.6 2B 14 57 03H 0.36 2B 14 61 02H 0.41 2B 14 61 03H 0.56 2B 14 61 05H 0.37 2B 14 63 03H 0.3 2B 14 70 02H 0.54 2B 14 83 03C 0.24 2B 14 84 04H 0.17 2B 14 88 02H 0.16

A-16 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 15 12 03H 0.28 2B 15 26 03H 0.38 2B 15 26 07H 0.11 2B 15 27 02H 0.12 2B 15 36 02H 0.23 2B 15 52 02H 0.37 2B 15 71 05H 0.18 2B 15 75 02H 0.07 2B 15 75 04H 0.18 2B 15 80 04H 0.41 2B 15 87 02H 0.11 2B 15 89 02H 0.46 2B 16 27 03H 0.32 2B 16 29 02H 0.15 SAI 2B 16 31 02H 0.32 2B 16 31 07H 0.22 2B 16 36 04H 0.14 2B 16 37 02H 0.22 2B 16 37 04H 0.26 SAI 2B 16 44 02H 0.26 2B 16 55 05H 0.26 2B 16 61 02H 0.28 2B 16 71 02H 0.17 2B 17 35 03H 0.53 2B 17 42 03H 0.61 2B 17 42 04H 0.51 2B 17 44 02H 0.28 SAI 2B 17 62 05H 0.45 2B 17 64 02H 0.1 2B 17 68 02H 0.32 2B 17 68 03H 0.41 2B 17 68 04H 1.07 SAI 2B 17 83 06C 0.19 2B 18 12 03H 0.19 2B 18 18 02H 0.25 2B 18 28 04H 0.43 2B 18 29 02H 0.48 2B 18 30 04H 0.23 2B 18 36 03H 0.89

A-17 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 18 37 03H 0.2 2B 18 38 03H 0.33 2B 18 42 02H 0.36 2B 18 53 03H 0.31 2B 18 53 04H 0.33 2B 18 54 02H 0.6 2B 18 57 03H 0.12 2B 18 58 02H 0.42 2B 18 61 03H 0.17 2B 18 64 03H 0.54 2B 18 69 04H 0.1 2B 18 69 05H 0.24 2B 18 76 03H 0.27 2B 19 15 02H 0.14 2B 19 15 04H 0.13 2B 19 29 02H 0.71 2B 19 29 03H 0.98 2B 19 36 02H 0.5 2B 19 39 03H 0.55 2B 19 39 04H 0.21 2B 19 40 03H 0.44 2B 19 45 02H 0.32 2B 19 50 03H 0.45 2B 19 51 02H 0.77 2B 19 51 03H 0.46 2B 19 69 02H 0.65 2B 19 71 05H 0.24 2B 19 74 02H 0.26 2B 19 76 02H 0.18 2B 19 78 02H 0.11 2B 19 85 02H 0.19 2B 20 11 02H 1.02 NDF 2B 20 16 03H 0.33 2B 20 19 04H 0.09 2B 20 20 04H 0.27 2B 20 23 02H 0.19 SAI 2B 20 70 02H 0.16 2B 20 81 02H 0.42 2B 20 89 02H 0.43

A-18 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 21 45 04H 0.22 2B 21 53 03H 0.39 2B 21 53 05H 0.22 2B 21 54 02H 1.4 NDF 2B 21 75 02H 0.22 2B 22 18 03H 0.96 SAI 2B 22 36 03H 0.18 2B 22 52 02H 0.12 2B 22 52 03H 0.23 2B 22 53 02H 0.17 2B 22 61 05H 0.19 2B 22 62 03H 0.33 2B 22 64 02H 0.26 2B 23 33 03H 0.24 2B 23 37 04H 0.68 SAI 2B 23 56 02H 0.32 2B 23 61 02H 0.24 2B 23 63 03H 0.2 2B 23 63 05H 0.15 2B 23 67 05H 0.28 2B 23 86 02H 0.27 2B 24 29 05H 0.21 2B 24 30 03H 0.22 2B 24 32 03H 0.18 2B 24 42 02H 0.32 2B 24 51 08H 0.12 2B 24 52 02H 0.34 2B 24 56 02H 0.16 2B 24 58 03H 0.27 2B 24 62 03H 0.51 2B 24 63 03H 0.55 2B 24 65 02H 0.1 2B 24 68 08H 0.14 2B 24 71 05H 0.21 2B 24 84 05H 0.32 2B 25 17 02H 0.1 2B 25 24 03H 0.56 2B 25 29 02H 0.18 2B 25 64 06H 0.33

A-19 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 25 79 08H 0.51 2B 26 30 03H 0.56 2B 26 39 03H 0.08 2B 26 78 02H 0.17 2B 27 17 05H 0.12 2B 27 46 06H 0.17 2B 27 52 04H 0.36 2B 27 53 03H 0.22 2B 27 68 02H 0.13 2B 28 41 02H 0.18 2B 28 59 04H 0.39 2B 28 63 03H 0.23 2B 28 67 03H 0.28 2B 28 81 02H 0.13 2B 29 20 03H 0.37 2B 29 27 03H 0.46 2B 29 31 05H 0.22 2B 29 32 03H 0.12 2B 29 32 05H 0.27 2B 29 34 03H 0.33 2B 29 35 04H 0.31 SAI 2B 29 37 03H 0.55 2B 29 38 02H 0.49 MAI 2B 29 40 03H 0.73 2B 29 41 02H 0.23 2B 29 56 02H 1.19 NDF 2B 30 16 04H 0.15 2B 30 16 07H 0.11 2B 30 20 04H 0.21 2B 30 27 02H 0.27 2B 30 32 03H 0.23 2B 30 50 04H 0.6 2B 30 55 03H 0.44 2B 30 56 04H 0.52 2B 30 59 04H 0.17 2B 30 78 02H 0.15 2B 30 78 04H 0.22 2B 30 79 02H 0.23 2B 30 81 03H 0.21

A-20 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 31 21 07H 0.58 2B 31 23 02H 0.84 2B 31 32 03H 0.56 2B 31 32 05H 0.43 2B 31 37 03H 0.35 2B 31 39 02H 0.14 2B 31 39 03H 0.42 2B 31 48 02H 0.87 2B 31 52 02H 0.58 2B 31 64 02H 0.11 2B 31 71 05H 0.15 2B 31 75 04H 0.16 2B 31 76 02H 0.31 2B 31 78 02H 0.33 2B 31 78 03H 1.04 NDF 2B 32 16 08H 0.17 2B 32 29 05H 0.22 2B 32 31 02H 0.16 SAI 2B 32 53 02H 0.61 2B 32 55 02H 0.32 2B 32 55 05H 0.19 2B 32 61 02H 0.22 2B 32 61 05H 0.41 2B 32 77 02H 0.4 2B 33 31 07H 0.24 2B 33 32 02H 0.29 2B 33 37 04H 0.28 2B 33 44 02H 0.28 2B 33 60 03H 0.1 2B 33 62 02H 0.63 2B 33 73 07H 0.43 2B 34 18 08H 0.21 2B 34 32 02H 0.3 2B 34 35 03H 0.15 2B 34 37 03H 0.27 2B 34 48 02H 0.56 SAI 2B 34 48 03H 0.33 2B 34 48 04H 0.18 2B 34 51 02H 0.78

A-21 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2B 34 51 03H 0.36 2B 34 57 02H 0.26 2B 35 40 02H 0.13 2B 36 25 05H 0.15 2B 36 42 03H 0.15 2B 36 58 05H 0.19 2B 36 64 02H 0.04 2B 37 24 05H 0.21 2B 37 32 03H 0.87 2B 37 57 02H 0.24 2B 37 57 05H 0.1 2B 38 35 02H 0.17 2B 38 63 03H 0.13 2B 39 31 05H 0.12 2B 39 33 03H 0.21 2B 40 31 05H 0.12 2B 40 42 02H 0.56 2B 41 31 05H 0.3 2B 41 52 08C 0.22 2B 41 68 04H 0.35 2B 42 51 04H 0.11 2B 44 48 02H 0.33

A-22 SG-SGMP-18-24 January 2019 Revision 0 Table A-3 SG-C 2R20 DSI Indications SG Row Col Locn 2R20 Volts Comment 2C 1

23 07C 0.34 2C 2

78 03H 0.41 2C 2

80 03H 0.19 2C 2

85 03H 0.39 2C 3

8 04H 0.41 2C 3

9 04H 0.1 2C 3

9 06H 0.12 2C 3

12 07H 0.26 2C 3

18 03H 0.24 2C 3

35 05H 0.24 2C 3

39 04H 0.18 2C 3

39 07H 0.45 2C 3

45 02H 0.38 2C 3

58 02H 0.51 2C 3

60 02H 0.4 2C 3

60 03H 0.48 2C 3

64 02H 0.21 2C 3

64 03H 0.67 2C 3

80 02H 0.31 2C 3

90 06H 0.33 2C 3

93 04H 0.36 2C 3

94 04H 0.25 2C 4

3 04H 0.13 2C 4

11 02H 0.21 2C 4

26 03H 0.75 2C 4

28 06H 0.4 2C 4

33 02H 0.44 2C 4

33 04H 0.35 2C 4

39 07H 0.51 SAI 2C 4

48 02H 0.22 2C 4

49 03H 0.43 2C 4

69 03H 0.29 2C 4

76 03H 0.44 2C 5

6 03H 0.3 2C 5

6 04H 0.11 2C 5

7 02H 0.23 2C 5

7 03H 0.9

A-23 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 5

15 03H 0.27 2C 5

18 02H 0.28 2C 5

19 02H 0.44 2C 5

19 03H 0.23 2C 5

29 03H 0.27 2C 5

61 02H 0.43 2C 5

62 02H 0.24 2C 5

66 03H 0.35 2C 5

70 05C 0.51 2C 5

71 02H 0.44 2C 5

76 03H 0.38 2C 5

86 08H 0.85 2C 5

89 02H 0.58 2C 6

23 02H 0.14 2C 6

30 02H 0.3 2C 6

30 03H 0.31 2C 6

54 03H 0.69 2C 6

55 02H 0.42 2C 6

63 02H 0.67 2C 6

78 03H 1.03 NDF 2C 6

84 03H 0.46 2C 6

92 04H 0.23 2C 7

12 08C 0.43 SAI 2C 7

40 03H 0.4 2C 7

40 04H 0.37 2C 7

49 02H 0.38 2C 7

49 03H 0.23 2C 7

58 02H 0.5 2C 7

67 02H 0.33 2C 7

80 03H 0.18 2C 8

2 08H 0.28 2C 8

23 02H 0.71 2C 8

24 02H 0.41 2C 8

43 03H 0.29 2C 8

63 06H 0.21 2C 8

72 03H 0.3 2C 8

84 03H 0.28 2C 9

13 03H 0.09 2C 9

20 04H 0.49

A-24 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 9

26 03H 0.3 NDF 2C 9

30 02H 0.38 2C 9

32 02H 0.69 2C 9

35 02H 0.53 2C 9

37 02H 0.44 2C 9

38 03H 0.29 2C 9

39 05H 0.27 2C 9

41 02H 0.45 2C 9

44 03H 0.17 2C 9

45 05H 0.39 2C 9

45 06H 0.26 2C 9

47 02H 0.42 2C 9

54 02H 0.96 2C 9

54 04H 0.35 2C 9

65 06H 0.29 2C 9

74 04H 0.2 2C 10 8

02H 0.76 2C 10 9

03H 0.28 2C 10 10 02H 0.48 2C 10 10 03H 0.19 2C 10 18 04H 0.14 2C 10 24 03H 0.24 2C 10 36 02H 0.36 2C 10 37 02H 0.54 2C 10 38 07H 0.44 2C 10 43 02H 0.17 2C 10 44 02H 0.33 2C 10 51 02H 0.66 2C 10 51 05H 0.23 2C 10 54 02H 0.67 NDF 2C 10 54 03H 0.44 NDF 2C 10 72 02H 0.47 2C 10 72 03H 0.51 2C 10 76 04H 0.2 2C 10 78 03H 0.13 2C 11 7

02H 0.32 2C 11 9

03H 0.61 2C 11 17 02H 0.31 2C 11 36 02H 0.46

A-25 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 11 49 02H 0.5 2C 11 62 03H 0.45 2C 11 70 03H 0.35 2C 11 72 03H 0.38 2C 11 88 05H 0.51 2C 12 9

02H 0.22 2C 12 30 02H 0.57 2C 12 35 04H 0.2 2C 12 55 02H 0.43 2C 12 70 02H 0.44 2C 12 70 03H 0.22 2C 12 83 03H 0.17 2C 13 7

03H 0.31 2C 13 32 02H 0.09 2C 13 35 02H 0.85 SAI 2C 13 35 05H 0.33 SAI 2C 13 43 02H 0.19 2C 13 43 03H 0.42 2C 13 59 03H 0.4 2C 13 62 04H 0.21 2C 13 63 02H 0.12 2C 13 64 02H 0.38 2C 14 29 04H 0.16 SAI 2C 14 38 02H 0.27 2C 14 39 05H 0.22 2C 14 50 02H 0.6 2C 14 54 02H 0.43 2C 14 59 03H 0.11 2C 14 59 04H 0.2 2C 14 59 06H 0.1 2C 14 70 08H 0.19 2C 15 5

04H 1.44 NDF 2C 15 14 03H 0.23 2C 15 35 02H 0.16 2C 15 35 03H 0.35 2C 15 38 04H 0.32 SAI 2C 15 39 02H 0.69 2C 15 39 03H 0.48 2C 15 61 02H 0.1

A-26 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 15 62 02H 0.4 2C 15 80 03H 0.15 2C 15 87 03H 0.31 2C 16 15 03H 0.61 2C 16 17 02H 0.31 2C 16 46 02H 0.61 2C 16 46 04H 0.2 2C 16 55 06H 0.38 2C 16 57 03H 0.59 2C 16 63 02H 0.1 2C 16 73 02H 0.27 2C 17 9

04H 0.24 SAI 2C 17 14 04H 0.22 2C 17 17 02H 0.12 2C 17 18 02H 0.32 2C 17 24 04H 0.1 2C 17 26 03H 0.21 2C 17 35 03H 0.7 SAI 2C 17 38 02H 0.32 2C 17 48 02H 1

NDF 2C 17 49 02H 0.4 2C 17 50 03H 0.59 SAI 2C 17 61 02H 0.68 2C 17 61 03H 0.32 2C 17 63 02H 0.38 2C 17 66 02H 0.18 2C 17 67 02H 0.43 2C 17 68 02H 0.39 2C 18 15 06H 0.15 2C 18 47 03H 0.73 2C 18 47 04H 0.44 2C 18 48 02H 0.6 NDF 2C 18 48 03H 0.64 NDF 2C 18 48 04H 0.47 NDF 2C 18 50 02H 0.36 2C 18 51 02H 0.35 2C 18 53 02H 0.61 2C 18 54 02H 0.49 2C 18 54 03H 0.3

A-27 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 18 55 02H 0.39 2C 18 56 03H 0.42 NDF 2C 18 59 03H 0.33 2C 18 62 02H 0.44 2C 18 62 03H 0.59 2C 18 62 04H 0.16 2C 18 66 03H 0.46 2C 18 67 02H 0.36 2C 18 67 03H 0.6 2C 18 73 03H 0.28 2C 19 26 03H 0.3 2C 19 29 02H 0.42 2C 19 48 02H 0.7 2C 19 48 03H 0.69 NDF 2C 19 54 02H 0.21 2C 19 57 04H 0.36 2C 19 57 05H 0.45 2C 19 79 02H 0.88 2C 20 75 02H 0.51 2C 20 76 02H 0.7 SAI 2C 20 76 03H 1.17 NDF 2C 20 78 04H 0.33 SAI 2C 20 85 03H 0.26 2C 21 18 02H 0.51 2C 21 18 03H 0.46 2C 21 25 04H 0.09 2C 21 62 02H 0.34 2C 21 67 07H 0.28 2C 22 18 02H 0.51 2C 22 18 05H 0.21 2C 22 20 02H 0.69 2C 22 24 03H 0.22 2C 22 33 02H 0.27 2C 22 61 03H 0.3 2C 22 64 03H 0.25 2C 22 75 04H 0.3 SAI 2C 22 77 03H 0.19 2C 23 10 02H 0.2 2C 23 28 03H 0.54

A-28 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 23 37 02H 0.7 2C 23 39 02H 0.23 2C 23 39 05H 0.22 2C 23 42 02H 0.27 2C 23 42 03H 0.41 2C 23 69 03H 0.18 2C 23 77 02H 0.28 2C 24 11 03H 0.26 2C 24 34 08H 0.46 2C 24 48 03H 1.22 NDF 2C 24 50 02H 0.17 2C 24 56 03H 0.2 2C 24 57 02H 0.25 2C 24 61 02H 0.42 2C 24 63 04H 0.21 2C 24 79 02H 0.7 2C 25 17 03H 0.2 2C 25 26 04H 0.11 2C 25 31 02H 0.59 2C 25 33 08H 0.2 2C 25 34 02H 0.76 2C 25 34 03H 0.33 2C 25 34 05H 0.54 2C 25 47 03H 0.45 2C 25 47 08H 0.16 2C 25 54 02H 0.2 2C 25 60 02H 0.51 2C 25 61 02H 0.23 2C 25 61 05H 0.38 2C 25 62 04H 0.5 NDF 2C 25 65 02H 0.38 2C 25 65 07H 0.31 SAI 2C 25 71 06H 0.35 2C 25 74 02H 0.2 SAI 2C 25 76 02H 0.61 2C 25 76 05H 0.41 2C 25 79 02H 0.2 2C 26 24 06H 0.05 2C 26 38 05H 0.14

A-29 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 26 39 05H 0.25 2C 26 42 02H 0.51 2C 26 44 06H 0.2 2C 26 65 03H 0.3 2C 26 70 03H 1.21 NDF 2C 26 72 08H 0.18 2C 27 20 02H 0.63 2C 27 22 02H 0.16 2C 27 24 04H 0.13 2C 27 31 02H 0.69 2C 27 60 02H 0.58 2C 27 69 02H 0.3 2C 27 76 03H 0.44 2C 28 27 05H 0.26 2C 28 35 02H 0.6 2C 28 42 02H 0.27 2C 28 42 04H 0.12 2C 28 44 02H 0.28 2C 28 50 03H 0.26 2C 28 73 03H 0.13 2C 28 85 02H 0.48 2C 29 11 05H 0.38 2C 29 26 05H 0.2 2C 29 29 03H 0.95 2C 29 37 02H 0.35 2C 29 38 05H 0.18 2C 29 43 03H 0.41 2C 29 47 02H 0.19 2C 29 48 05H 0.27 2C 29 57 05H 0.17 2C 29 63 05H 0.21 2C 30 12 03H 0.21 2C 30 24 02H 0.36 2C 30 25 04H 0.1 2C 30 31 03H 0.29 2C 30 31 04H 0.29 2C 30 41 02H 0.18 2C 30 60 02H 0.37 2C 30 61 02H 0.71

A-30 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 30 61 04H 0.43 SAI 2C 30 64 04H 0.47 SAI 2C 31 14 05H 0.09 2C 31 17 04H 0.12 2C 31 22 02H 0.21 2C 31 29 04H 0.67 2C 31 49 02H 0.19 2C 31 60 02H 0.38 2C 31 61 03H 0.24 2C 31 61 04H 0.21 2C 31 62 03H 0.5 2C 31 64 04H 0.54 SAI 2C 31 66 02H 0.48 2C 31 66 05H 0.28 2C 31 75 02H 0.3 SAI 2C 31 77 06H 0.15 2C 31 81 02H 1.3 NDF 2C 31 81 03H 0.45 2C 32 19 05H 0.25 2C 32 25 03H 0.23 2C 32 63 03H 0.3 SAI 2C 32 67 06H 0.23 SAI 2C 33 34 06H 0.23 2C 33 60 07H 0.29 2C 34 24 07H 0.11 2C 34 39 05H 0.18 2C 34 55 03H 0.38 2C 34 58 02H 0.52 2C 34 58 04H 0.33 2C 34 58 05H 0.27 2C 34 59 02H 0.53 2C 35 22 02H 0.15 2C 35 26 05H 0.77 2C 35 34 03H 0.17 2C 35 34 04H 0.19 2C 35 38 07H 0.12 2C 35 53 06H 0.2 2C 36 20 03H 0.6 2C 36 26 05H 0.64

A-31 SG-SGMP-18-24 January 2019 Revision 0 SG Row Col Locn 2R20 Volts Comment 2C 36 27 05H 0.26 2C 36 53 02H 1.33 SAI 2C 37 26 05H 0.12 2C 37 35 03H 0.1 2C 37 52 06H 0.21 2C 38 42 05H 0.17 2C 39 27 04H 0.29 2C 40 25 03H 0.12 2C 40 39 03H 0.09 2C 40 53 04H 0.43 2C 41 27 04H 0.25 2C 41 44 04H 0.4 2C 41 50 08H 0.21 2C 42 32 04H 0.12 2C 46 41 07H 0.2

Enclosure B L-19-034 Unit #2 - 2R20 Steam Generator F* (F Star) Report (11 Pages Follow)

FIRST ENERGY NUCLEAR OPERATING COMPANY Technical Services Engineering Department Nuclear Engineering Programs Section Beaver Valley Power Station

Subject:

Unit #2 - 2R20 Steam Generator F* (F Star) Report Prepared by:

Date:

O I /01 /2019 Reviewed by:

Date: 1--ff-ZDI I Approved by:

Date:

UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT Technical Specification 5.6.6.2.4 requires that a report be submitted to the Nuclear Regulatory Commission (NRC) within 90 days after the initial entry into MODE 4 following an outage in which the F* (F Star) methodology was utilized during steam generator (SG) inspections. For the fall 2018 refueling outage (2R20), the initial entry into MODE 4 occurred on November 12, 2018.

Per Technical Specification 5.6.6.2.4, the following information is to be submitted to the NRC:

(a)

Total number of indications, location of each indication, orientation of each indication, severity of each indication, and whether the indications initiated from the inside or outside surface. This information can be found in Tables 2RCS-SG21A, 2RCS-SG21 B and 2RCS-SG21 C.

(b)

The cumulative number of indications detected in the tubesheet region as a function of elevation within the tubesheet. This information can be found in Attachment A: "Unit 2 - Cumulative Listing of Tubesheet Indications (All Outages)".

(c)

The projected end-of-cycle accident-induced leakage from tubesheet indications. This information can be found in the right-hand column of Tables 2RCS-SG21A, 2RCS-SG218 and 2RCS-SG21C. It is also explained in Item 4 under Information for All Tables on Page 3.

Discussion:

During 2R20, the Plus Point probe was utilized to inspect the top of tubesheet region in both the hot and cold legs. The 2R20 inspection scope included 100 percent of the inservice hot leg tubes in all three SGs plus a twenty percent random sample of the inservice cold leg tubes in 2RCS-SG21 B. The inspection distance for either leg was from 6.0 inches above the top of tubesheet to 3.0 inches below the top of tubesheet. This inspection distance bounds the required F* examination distance (that is, the expanded portion of the tube below the bottom of roll expansion transition) of 2.22 inches below the bottom of the roll expansion transition.

There are ten tubes located on the hot leg side of the SGs that have roll expansion transitions at lower than nominal elevations. The ten hot leg tubes with the deeper roll transition locations were inspected to a depth of 5.0 inches below the top of tubesheet to ensure the F* distance was adequately examined. On the cold leg side of 2RCS-SG21 B, there are seven tubes with a lower than nominal roll transition location. These tubes were not included in the 2R20 twenty percent random sample inspection of the cold leg tubesheet. However, these seven tubes were included with the 2R20 special interest sample plan for cold leg tubesheet bulges and over-expansions. No indications were reported from the cold leg tubesheet examinations performed in 2RCS-SG21 B.

The morphology for the majority of the indications being reported from the hot leg top of tubesheet region is believed to be outside diameter stress corrosion cracking (ODSCC). This is based on signal recognition and the location of the reported indications. Both axial and circumferentially orientated indications were observed. Circumferential indications located above the top of tubesheet remain bounded by the expansion transition.

None of the indications that were reported during the 2R20 SG examinations represented a (Cycle 20) leakage potential at postulated main steam line break (MSLB) conditions nor did the 2R20 indications challenge the structural integrity performance criteria.

The projected accident induced leakage from all combined sources (sleeves, plugs, indications left in-service under Generic Letter 95-05 and other degradation within the tube bundle) remains well below the 2.2 gallons per minute (gpm) per SG allowed by the Technical Specifications.

The information provided on the following pages summarizes the degradation observed during the 2R20 top of tubesheet region examinations.

2

UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT Information for all Tables:

1)

Elevation column: TSH - Top of tubesheet (Hot Leg). 0.00" is located at the secondary side tubesheet face. A negative measurement is the distance into the tubesheet from the secondary side face. All other elevations(> 0.00") are considered to be above secondary side tubesheet face.

2)

Orientation column: SAi - Single axial indication; SCI/MCI - Single or multiple circumferential indications.

3)

Severity columns: This data has been re-analyzed utilizing the Plus Point probe 300 kHz channel. The 300 kHz channel provides the most accurate sizing technique and is used for assessing the severity of the indications. The reported arc lengths are taken from the data resolution process. Profile analysis shows these measurements to be generally conservative.

4)

Proiected EOC Leakage column: Indications reported within the 3.0" (5.0" for particular tube locations) inspection distance below the top-of-tubesheet were either removed from service via plugging or repaired with the Alloy 800 sleeve during 2R20. The projected end of cycle (EOC) accident induced leakage from indications that were removed from service via plugging is considered zero. See Note 1 after each table for the projected leakage information for tubes with sleeves installed.

2RCS-SG21A Hot Leg Tubesheet:

There were ninety-three indications in ninety-one tubes. Eighty-six indications were located at or slightly below the top of tubesheet (Sixty-nine were single circumferential ODSCC indications, ten were multiple circumferential ODSCC indications and seven were single axial indications). The remaining seven indications were located above the top of tubesheet (Six were single circumferential ODSCC indications and one was a single axial indications).

Table 2RCS-SG21 A Indication Location Severity Initiation Projected Axial Arc Elevation Orientation Surface/

EOC SG Row Column (Inches)

Volts Length Length Degradation Leakage (Inches)

(Degrees)

A 1

78 TSH

-0.09 SCI 0.16 120.00 OD Zero A

2 37 TSH 0.00 SCI 0.09 136.90 OD Zero A

2 59 TSH

-0.07 SCI 0.07 73.10 OD Zero A

3 58 TSH

-0.08 SCI 0.17 66.20 OD See Note 1 A

3 59 TSH

-0.07 SCI 0.12 70.80 OD See Note 1 A

3 60 TSH

-0.10 SCI 0.13 52.30 OD See Note 1 A

4 40 TSH

-0.04 SCI 0.08 110.80 OD See Note 1 A

4 56 TSH

-0.07 SCI 0.08 58.50 OD See Note 1 A

4 59 TSH

-0.11 SCI 0.14 29.20 OD See Note 1 A

4 60 TSH

-0.06 SCI 0.14 100.00 OD See Note 1 A

4 61 TSH

-0.12 SCI 0.07 29.20 OD See Note 1 A

4 64 TSH

-0.06 SCI 0.12 35.40 OD See Note 1 A

5 28 TSH 0.11 SCI 0.12 69.00 OD See Note 1 A

5 56 TSH 0.00 MCI 0.17 80.00 OD See Note 1 A

5 59 TSH

-0.01 SCI 0.17 80.00 OD See Note 1 A

5 72 TSH

-0.11 SCI 0.12 104.60 OD See Note 1 A

6 10 TSH

-0.11 SCI 0.20 170.80 OD See Note 1 A

6 33 TSH 0.00 SCI 0.17 110.80 OD See Note 1 3

SG A

A A

A UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT Table 2RCS-SG21A ccont.>

Indication Location Severity Initiation Elevation Orientation Axial Arc Surface/

Row Column (Inches)

Volts Length Length Degradation Cinches)

(Degrees) 6 35 TSH 0.00 SCI 0.06 66.20 OD 6

41 TSH 1.03 SAi 0.10 0.24 OD 6

59 TSH

-0.08 SCI 0.19 130.80 OD 7

22 TSH

-0.19 SCI 0.09 110.80 OD 7

33 TSH

-0.13 SCI 0.11 30.80 OD 7

40 TSH

-0.13 MCI 0.06 100.00 OD 7

68 TSH

-0.17 SCI 0.11 109.20 OD 7

79 TSH

-0.04 SCI 0.22 275.40 OD 8

40 TSH

-0.08 MCI 0.05 152.30 OD 8

50 TSH

-0.06 MCI 0.08 40.00 OD 8

52 TSH

-0.05 SCI 0.11 93.80 OD 8

54 TSH 0.01 SCI 0.08 135.40 OD 8

55 TSH 0.00 SCI 0.09 192.20 OD 8

61 TSH 0.15 SCI 0.04 90.80 OD 9

35 TSH 0.00 SCI 0.12 116.90 OD 9

58 TSH 0.00 SCI 0.22 81.50 OD 9

68 TSH

-0.09 SCI 0.26 120.60 OD 9

75 TSH

-0.15 SCI 0.16 130.80 OD 10 40 TSH 0.02 SCI 0.07 33.80 OD 10 63 TSH

-0.10 SCI 0.10 144.60 OD 11 37 TSH

-0.13 MCI 0.14 181.50 OD 11 48 TSH

-0.04 SCI 0.07 156.90 OD 11 52 TSH 0.00 MCI 0.13 193.80 OD 11 58 TSH

-0.06 MCI 0.12 185.30 OD 11 59 TSH

-0.10 SCI 0.16 100.00 OD 11 60 TSH

-0.09 SCI 0.23 129.20 OD 11 62 TSH

-0.11 SCI 0.16 118.50 OD 12 39 TSH

-0.05 SCI 0.16 124.60 OD 12 44 TSH

-0.10 MCI 0.07 133.80 OD 12 53 TSH

-0.04 MCI 0.10 38.50 OD 12 60 TSH

-0.10 SCI 0.05 16.90 OD 13 55 TSH 0.00 SCI 0.07 72.30 OD 13 56 TSH

-0.03 SCI 0.07 46.20 OD 13 58 TSH

-0.09 SCI 0.09 49.20 OD 13 64 TSH

-0.02 SCI 0.06 56.90 OD 13 76 TSH

-0.03 SCI 0.18 127.70 OD 14 56 TSH

-0.11 SCI 0.17 106.20 OD 15 22 TSH

-0.15 SCI 0.10 16.50 OD 15 51 TSH

-0.06 SCI 0.10 38.50 OD 15 62 TSH 0.00 SCI 0.11 101.50 OD 16 48 TSH 0.00 SCI 0.09 78.50 OD 17 33 TSH

-0.17 SCI 0.30 156.90 OD 4

Projected EOC Leakage See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 Zero See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1

SG A

A A

UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT Table 2RCS-SG21 A ccont.)

Indication Location Severity Initiation Elevation Orientation Axial Arc Surface/

Row Column (Inches)

Volts Length Length Degradation (Inches)

(Degrees) 17 46 TSH 0.00 SAi 0.13 0.12 OD 17 73 TSH 0.00 SCI 0.13 110.80 OD 18 27 TSH 0.00 SAi 0.12 0.14 OD 19 45 TSH

-0.03 SCI 0.16 53.80 OD 22 46 TSH 0.00 SCI 0.08 118.50 OD 23 18 TSH

-0.16 MCI 0.17 140.00 OD 23 22 TSH

-0.14 SCI 0.11 27.70 OD TSH

-0.14 SAi 0.11 0.31 OD 23 27 TSH

-0.06 SCI 0.15 66.20 OD 24 27 TSH 0.00 SAi 0.13 0.13 OD 24 70 TSH

-0.13 SCI 0.07 24.60 OD 25 46 TSH

-0.14 SCI 0.14 229.20 OD 26 28 TSH 0.00 SCI 0.13 26.20 OD 28 21 TSH

-0.14 SAi 0.11 0.18 OD 28 27 TSH

-0.10 SCI 0.17 101.50 OD TSH

-0.01 SCI 0.08 16.90 OD 28 64 TSH 0.04 SCI 0.10 16.90 28 67 TSH

-0.02 SCI 0.11 204.60 OD 28 70 TSH 0.00 SAi 0.15 0.11 OD 28 77 TSH 0.02 SCI 0.14 146.20 OD 29 69 TSH 0.00 SCI 0.11 58.50 OD 30 25 TSH

-0.20 SCI 0.10 140.00 OD 30 40 TSH

-0.10 SCI 0.14 155.40 OD 30 44 TSH

-0.07 SCI 0.11 36.90 OD 31 66 TSH

-0.04 SCI 0.13 193.00 OD 33 27 TSH

-0.06 SAi 0.08 0.16 OD 33 73 TSH 0.00 SCI 0.17 110.80 OD 34 66 TSH 0.00 SCI 0.11 100.00 OD 37 66 TSH 0.00 SCI 0.13 32.30 OD 39 61 TSH 0.00 SCI 0.10 61.50 OD 39 62 TSH

-0.06 SCI 0.13 149.20 OD 42 48 TSH 0.00 SCI 0.19 120.00 OD 42 49 TSH

-0.04 SCI 0.11 146.20 OD Projected EOC Leakage See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 Zero See Note 1 See Note 1 See Note 1 See Note 1 Zero See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 Zero See Note 1 Zero Zero Zero Zero Zero Note 1 - PerWCAP 15919 (R2), "SG Tube Repair for Westinghouse Designed Plants with 7/8" lnconel 600 Tubes Using Leak Limiting Alloy 800 Sleeves", the per sleeve leak rate at normal operating conditions is 0.000543 gallons per hour (gph) and at main steam line or feedwater line break conditions is 0.000863 gph. For 2RCS-SG21A which currently has 247 Alloy 800 tubesheet sleeves installed, this equates to 2.2354 x 10-3 gpm and 3.5527 x 10-3 gpm, respectively.

5

UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT 2RCS-SG218 Hot Leg Tubesheet:

There were ninety-nine indications in ninety-nine tubes. Eighty-six indications were located at or slightly below the top of tubesheet (Eighty-one were single circumferential ODSCC indications, two were multiple circumferential ODSCC indications and three were single axial ODSCC indications). The remaining Thirteen indications were located above the top of tubesheet (Nine were single circumferential ODSCC indications, one was a multiple circumferential ODSCC indication and three were single axial ODSCC indications).

Table 2RCS-SG218 Indication Location Severity Initiation Projected Elevation Orientation Axial Arc Surface/

EOC SG Row Column (Inches)

Volts Length Length Degradation Leakage (Inches)

{Dearees)

B 1

72 TSH

-0.07 SCI 0.11 61.50 OD Zero B

2 71 TSH 0.00 SCI 0.07 92.30 OD Zero B

3 33 TSH

-0.05 SCI 0.15 93.80 OD See Note 1 B

3 68 TSH

-0.09 SCI 0.19 146.20 OD See Note 1 B

4 59 TSH 0.57 SCI 0.11 30.80 OD See Note 1 B

5 31 TSH

-0.22 SCI 0.10 35.40 OD See Note 1 B

6 64 TSH 0.00 SCI 0.04 147.70 OD See Note 1 B

7 27 TSH 0.00 SCI 0.05 36.90 OD See Note 1 B

7 42 TSH 0.00 SAi 0.08 0.14 OD See Note 1 B

7 50 TSH 0.00 SCI 0.07 113.80 OD See Note 1 B

8 37 TSH 0.06 SCI 0.18 67.70 OD See Note 1 B

8 56 TSH 0.04 SCI 0.14 76.90 OD See Note 1 B

8 59 TSH

-0.16 SCI 0.08 35.40 OD See Note 1 B

8 60 TSH

-0.08 SCI 0.08 38.50 OD See Note 1 B

9 26 TSH

-0.10 SCI 0.11 46.20 OD See Note 1 B

9 39 TSH

-0.04 SCI 0.09 36.90 OD See Note 1 B

9 70 TSH

-0.07 SCI 0.07 27.70 OD See Note 1 B

9 72 TSH 0.00 SCI 0.11 83.10 OD See Note 1 B

10 12 TSH

-0.01 SCI 0.08 123.10 OD See Note 1 B

10 14 TSH 0.00 SCI 0.16 135.40 OD See Note 1 B

10 16 TSH 0.00 SCI 0.12 193.80 OD See Note 1 B

10 54 TSH

-0.01 SCI 0.08 27.70 OD See Note 1 B

10 56 TSH 0.00 SCI 0.15 115.40 OD See Note 1 B

11 41 TSH

-0.02 MCI 0.11 120.00 OD See Note 1 B

11 43 TSH 0.04 MCI 0.12 206.20 OD See Note 1 B

11 44 TSH

-0.08 SCI 0.13 297.00 OD See Note 1 B

11 51 TSH

-0.06 SCI 0.16 213.50 OD See Note 1 B

11 52 TSH 0.00 SCI 0.10 129.20 OD See Note 1 B

12 33 TSH 0.00 SCI 0.17 276.90 OD See Note 1 B

12 52 TSH 0.00 SCI 0.13 78.50 OD See Note 1 B

12 55 TSH

-0.03 SCI 0.09 35.40 OD See Note 1 B

12 56 TSH 0.00 SCI 0.08 96.90 OD See Note 1 B

12 59 TSH 0.00 SCI 0.08 76.90 OD See Note 1 B

13 36 TSH

-0.15 SAi 0.35 0.16 OD See Note 1 B

13 41 TSH

-0.05 SCI 0.11 33.80 OD See Note 1 B

13 45 TSH

-0.04 SCI 0.13 63.10 OD See Note 1 B

13 50 TSH

-0.07 SCI 0.16 237.20 OD See Note 1 6

SG B

B B

B 8

8 B

B B

8 B

B 8

B B

UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT Table 2RCS-SG21 B ccont.>

Indication Location Severity Initiation Elevation Orientation Axial Arc Surface/

Row Column (Inches)

Volts Length Length Degradation finches)

(Degrees) 13 52 TSH 0.07 SCI 0.11 15.40 OD 13 53 TSH 0.00 SCI 0.10 106.20 OD 14 27 TSH

-0.06 SCI 0.15 132.30 OD 14 44 TSH

-0.05 SCI 0.06 27.70 OD 14 57 TSH 0.00 SCI 0.12 129.20 OD 14 61 TSH

-0.10 SCI 0.14 24.60 OD 14 70 TSH 0.00 SCI 0.16 178.50 OD 15 11 TSH 0.00 SCI 0.10 83.10 OD 15 12 TSH

-0.01 SCI 0.10 47.70 OD 15 43 TSH

-0.04 SCI 0.11 21.50 OD 15 71 TSH

-0.06 SCI 0.27 135.40 OD 16 16 TSH

-0.12 SCI 0.11 40.00 OD 16 19 TSH

-0.07 SCI 0.12 146.20 OD 16 20 TSH

-0.26 SCI 0.12 86.20 OD 16 28 TSH 0.00 SCI 0.16 226.00 OD 16 35 TSH 0.01 SCI 0.12 101.50 OD 17 16 TSH 0.00 SCI 0.13 147.70 OD 17 19 TSH

-0.08 SCI 0.10 75.40 OD 17 20 TSH

-0.04 SCI 0.17 42.00 OD 17 23 TSH

-0.05 SCI 0.15 32.30 OD 17 68 TSH

-0.11 SCI 0.18 170.20 OD 18 24 TSH 0.00 SCI 0.26 93.80 OD 18 35 TSH

-0.07 SCI 0.08 304.60 OD 18 51 TSH 0.00 SCI 0.07 47.00 OD 19 22 TSH 0.08 SAi 0.38 0.18 OD 19 69 TSH 0.08 SCI 0.18 147.70 OD 20 21 TSH 0.11 SAi 0.13 0.08 OD 20 23 TSH 0.00 SAi 0.24 0.16 OD 20 29 TSH

-0.10 SCI 0.10 60.00 OD 20 40 TSH 0.03 SCI 0.12 50.80 OD 20 so TSH 0.00 SCI 0.10 29.20 OD 20 76 TSH

-0.02 SCI 0.21 201.50 OD 21 32 TSH

-0.02 SCI 0.13 83.10 OD 22 51 TSH 0.00 SCI 0.13 27.70 OD 23 28 TSH 0.19 SAi 0.17 0.23 OD 24 51 TSH

-0.13 SCI 0.09 121.50 OD 24 60 TSH

-0.08 SCI 0.14 30.80 OD 25 31 TSH

-0.07 SCI 0.22 106.20 OD 27 27 TSH

-0.15 SCI 0.14 160.00 OD 27 30 TSH

-0.05 SCI 0.12 20.00 OD 27 63 TSH

-0.12 SCI 0.11 181.50 OD 7

Projected EOC Leakage See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1

$ee Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1

SG B

B B

UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT Table 2RCS-SG21 B (Cont.)

Indication Location Severity Initiation Elevation Orientation Axial Arc Surface/

Row Column (Inches)

Volts Length Length Degradation (Inches) lDearees) 28 38 TSH

-0.04 SCI 0.10 30.80 OD 28 67 TSH 0.04 SCI 0.17 96.90 OD 29 29 TSH

-0.48 SCI 0.08 30.00 OD 30 31 TSH

-0.05 SCI 0.15 195.40 OD 30 32 TSH

-0.03 SCI 0.11 190.80 OD 30 58 TSH

-0.11 SCI 0.10 161.50 OD 31 48 TSH

-0.03 SCI 0.10 81.50 OD 31 67 TSH 0.00 SCI 0.12 216.90 OD 32 47 TSH

-0.04 SCI 0.12 124.60 OD 32 49 TSH

-0.10 MCI 0.07 207.30 OD 32 57 TSH 0.10 SCI 0.11 43.10 OD 33 57 TSH 0.12 SCI 0.14 104.60 OD 35 41 TSH 0.00 SCI 0.06 27.70 OD 35 59 TSH

-0.06 SCI 0.23 141.50 OD 35 60 TSH

-0.04 SCI 0.10 10.80 OD 36 32 TSH

-0.11 SCI 0.12 121.50 OD 36 33 TSH

-0.10 SCI 0.15 210.30 OD 36 36 TSH

-0.03 SCI 0.08 210.30 OD 36 47 TSH

-0.05 SCI 0.17 241.50 OD 36 51 TSH

-0.04 SCI 0.10 33.80 OD 36 65 TSH 0.09 SCI 0.20 127.70 OD Projected EOC Leakage See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 Zero Zero See Note 1 Zero See Note 1 See Note 1 Note 1 - Per WCAP 15919 (R2), "SG Tube Repair for Westinghouse Designed Plants with 7/8" lnconel 600 Tubes Using Leak Limiting Alloy 800 Sleeves", the per sleeve leak rate at normal operating conditions is 0.000543 gallons per hour (gph) and at main steam line or feedwater line break conditions is 0.000863 gph. For 2RCS-SG21B which currently has 169 Alloy 800 tubesheet sleeves installed, this equates to 1.5295 x 10-3 gpm and 2.4308 x 10-3 gpm, respectively.

2RCS-SG21 B Cold Leg Tubesheet:

A twenty percent random sample of the inservice cold leg tubes in 2RCS-SG21 B was performed from 6 inches above to 3 inches below TTS. No tubes with roll expansions greater than 0. 75 inches below the top of tubesheet were included in the random sample, therefore no tubes were required to be inspected to a depth of greater than 3.0 inches. No indications were detected during the cold leg inspection in 2RCS-SG21 B.

8

UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT 2RCS-SG21 C Hot Leg Tubesheet:

There were fifty-one indications in fifty-one tubes. Forty-seven indications were located at or slightly below the top of tubesheet (Forty-seven were single circumferential ODSCC indications). The remaining four indications were located above the top of tubesheet (Four were single circumferential ODSCC indications).

Table 2RCS-SG21 C Indication Location Severity Initiation Projected Elevation Orientation Axial Arc Surface/

EOC SG Row Column (Inches)

Volts Length Length Degradation Leakage (Inches}

(Degrees)

C 1

53 TSH 0.00 SCI 0.06 47.70 OD Zero C

1 56 TSH

-0.11 SCI 0.14 178.50 OD Zero C

1 65 TSH 0.00 SCI 0.14 167.70 OD Zero C

1 67 TSH

-0.09 SCI 0.11 222.30 OD Zero C

1 69 TSH

-0.06 SCI 0.13 170.80 OD Zero C

1 82 TSH

-0.06 SCI 0.12 93.80 OD Zero C

3 56 TSH 0.00 SCI 0.13 40.00 OD See Note 1 C

4 33 TSH 0.11 SCI 0.34 183.00 OD See Note 1 C

5 22 TSH

-0.13 SCI 0.26 143.10 OD See Note 1 C

5 46 TSH

-0.04 SCI 0.08 15.40 OD See Note 1 C

5 50 TSH

-0.10 SCI 0.11 41.00 OD See Note 1 C

5 54 TSH 0.02 SCI 0.17 50.50 OD See Note 1 C

6 46 TSH

-0.04 SCI 0.20 218.50 OD See Note 1 C

7 29 TSH

-0.01 SCI 0.11 120.00 OD See Note 1 C

7 so TSH

-0.04 SCI 0.10 30.50 OD See Note 1 C

7 68 TSH

-0.10 SCI 0.14 35.40 OD See Note 1 C

9 so TSH

-0.01 SCI 0.14 30.00 OD See Note 1 C

9 58 TSH

-0.06 SCI 0.09 86.20 OD See Note 1 C

10 78 TSH

-0.08 SCI 0.15 72.30 OD See Note 1 C

11 17 TSH

-0.05 SCI 0.15 106.20 OD See Note 1 C

11 18 TSH

-0.03 SCI 0.14 130.80 OD See Note 1 C

11 32 TSH

-0.06 SCI 0.09 76.90 OD See Note 1 C

12 73 TSH

-0.10 SCI 0.08 69.20 OD See Note 1 C

13 13 TSH 0.00 SCI 0.07 29.20 OD See Note 1 C

15 72 TSH 0.00 SCI 0.17 141.50 OD See Note 1 C

18 64 TSH

-0.06 SCI 0.05 38.50 OD See Note 1 C

18 69 TSH

-0.06 SCI 0.14 146.20 OD See Note 1 C

22 34 TSH

-0.05 SCI 0.20 56.90 OD See Note 1 C

23 37 TSH 0.00 SCI 0.34 133.80 OD See Note 1 C

25 31 TSH

-0.05 SCI 0.20 144.50 OD See Note 1 C

25 69 TSH

-0.07 SCI 0.16 140.00 OD See Note 1 C

25 72 TSH

-0.08 SCI 0.15 153.80 OD See Note 1 C

25 74 TSH 0.00 SCI 0.15 166.20 OD See Note 1 C

26 25 TSH 0.00 SCI 0.13 75.40 OD See Note 1 9

SG C

C C

UNIT #2 - 2R20 STEAM GENERATOR F* (F STAR) REPORT Table 2RCS-SG21 C (Cont.>

Indication Location Severity Initiation Elevation Orientation Axial Arc Surface/

Row Column (Inches)

Volts Length Length Degradation

{Inches)

(Degrees) 26 38 TSH 0.09 SCI 0.18 58.50 OD 26 66 TSH

-0.10 SCI 0.08 47.70 OD 27 35 TSH 0.00 SCI 0.15 256.00 OD 27 37 TSH 0.00 SCI 0.15 181.50 OD 27 40 TSH

-0.07 SCI 0.11 72.30 OD 28 58 TSH

-0.01 SCI 0.09 156.30 OD 30 55 TSH

-0.04 SCI 0.16 101.50 OD 30 57 TSH 0.04 SCI 0.15 38.50 OD 30 62 TSH

-0.09 SCI 0.13 72.30 OD 30 64 TSH

-0.07 SCI 0.10 132.30 OD 31 38 TSH 0.00 SCI 0.11 52.30 OD 35 35 TSH

-0.09 SCI 0.18 41.50 OD 35 50 TSH 0.00 SCI 0.11 181.50 OD 36 53 TSH

-0.12 SCI 0.14 229.00 OD 37 59 TSH

-0.04 SCI 0.14 72.30 OD 37 62 TSH

-0.16 SCI 0.11 41.50 OD 37 66 TSH

-0.11 SCI 0.11 47.30 OD Projected EOC Leakage See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 Zero Zero Note 1 - Per WCAP 15919 (R2), "SG Tube Repair for Westinghouse Designed Plants with 7 /8" lnconel 600 Tubes Using Leak Limiting Alloy 800 Sleeves", the per sleeve leak rate at normal operating conditions is 0.000543 gallons per hour (gph) and at main steam line or feedwater line break conditions is 0.000863 gph. For 2RCS-SG21C which currently has 65 Alloy 800 tubesheet sleeves installed, this equates to 5.8825 x 10-4 gpm and 9.3492 x 10-4 gpm, respectively.

10

Attachment A Unit 2 - Cumulative Listing of Tubesheet Indications (All Outages)

(Updated through 2R20) 2RCS-SG21A 2RCS-SG21A 2RCS-SG21B 2RCS-SG21B Hot Leg Tubesheet Cold Leg Tubesheet Hot Leg Tubesheet Cold Leg Tubesheet INCH COUNT INCH COUNT INCH COUNT INCH COUNT 0.00" 83 0.00 11 0.00" 49 0.00"

- 0.01" 20

- 0.01"

- 0.01" 13

- 0.01"

- 0.02" 19

- 0.02"

- 0.02" 9

- 0.02"

- 0.03" 29

- 0.03"

- 0.03" 19 0.03"

- 0.04" 28

- 0.04"

- 0.04" 20

- 0.04"

- 0.05" 24

-.. 0;05

.. t*.. * *

- 0.05" 22

- 0.05"

- 0.06" 30

- 0.06"

- 0.06" 18 0.06"

- 0.07" 28

- 0.07"

- 0.07" 21 0.07"

- 0.08" 23

- 0.08"

- 0.08" 33

- 0.08"

- 0.09" 24

- 0.09"

- 0.09" 27

- 0.09" 0.10" 20

- 0.10"

- 0.10" 20

- 0.10"

- 0.11" 30

- 0.11" 0.11" 19

- 0.11"

- 0.12" 7

0.12"

- 0.12" 11 0.12"

- 0.13" 20

- 0.13"

- 0.13" 3

- 0.13"

- 0.14" 12

- 0.14"

- 0.14" 2

- 0.14"

- 0.15" 6

- 0.15"

- 0.15" 8

- 0.15"

- 0.16" 7

- 0.16" I

1

- 0.16" 3

0.16" 0.17" 6

- 0.17"

- 0.17" 3

0.17"

- 0.18" 0.18"

- 0.18" 4

- 0.18"

- 0.19" 2

- 0.19"

- 0.19" 0.19"

- 0.20" 2

0.20"

- 0.20" 2

0.20"

- 0.21" 0.21" 3

- 0.22" 0.22" 2

- 0.23" 1

- 0.26" 1

- 0.27" 1

- 0.31" 1

- 0.48" 1

The five shaded tube locations were reported as a distorted tubesheet signal from the bobbin coil probe. Rotating pancake coil examinations did not confirm any of these signal as real indications.

TOTAL 421 TOTAL 2

TOTAL 315 TOTAL 1

11 2RCS-SG21C Hot Le Tubesheet INCH COUNT 0.00" 22 0.01" 3

0.02" 3

- 0.03" 5

- 0.04" 12

- 0.05" 17

- 0.06" 16

- 0.07" 13 0.08" 20

- 0.09" 16

- 0.10" 16

- 0.11" 13

- 0.12" 9

- 0.13" 5

- 0.14" 6

- 0.15" 1

- 0.16" 4

- 0.17" 1

- 0.18" 2

- 0.19" 1

- 0.20"

- 0.22" 1

- 0.36" 1

- 0.40" 1

0.41" 1

0.50" 1

1.22" 1

1.49" 1

3.16" 1

TOTAL 194 2RCS-SG21C Cold Leg Tubesheet INCH COUNT 0.00"

- 0.01"

- 0.02"

- 0.03"

- 0.04" 0.05"

- 0.06"

- 0.07"

- 0.08"

- 0.09"

- 0.10"

- 0.11"

- 0.12" 0.13"

- 0.14"

- 0.15"

- 0.16"

- 0.17"

- 0.18"

- 0.19"

- 0.20" TOTAL 1

v t e Letter Sequence Request
EPID:L-2019-LRO-0000, Day Steam Generator Tube Inspection Report (Approved, Closed)
Initiation Request, Request Acceptance... Administration Questions Answers Results Approval Other:
MONTHYEAR2019-03-28 [Table View]

L-19-034, Steam Generator Inspection Reports - Fall 2018 Refueling Outage

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L-19-034, Steam Generator Inspection Reports - Fall 2018 Refueling Outage

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