View source for SBK-L-05172, Response to Request for Additional Information Regarding Seabrook Station Unit No. 1, Steam Generator Tube Inspection Summary for the Fall 2003 Outage

{{Adams
| number = ML052280221
| issue date = 08/04/2005
| title = Response to Request for Additional Information Regarding Seabrook Station Unit No. 1, Steam Generator Tube Inspection Summary for the Fall 2003 Outage
| author name = St.Pierre G
| author affiliation = Florida Power &amp; Light Energy Seabrook, LLC
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000443
| license number = NPF-086
| contact person = 
| case reference number = SBK-L-05172, TAC MC4907
| document type = Graphics incl Charts and Tables, Letter type:SBK
| page count = 45
| project = TAC:MC4907
| stage = Response to RAI
}}

=Text=
{{#Wiki_filter:FPL Energy Seabrook Station FPL Energy                                                           P.O. Box 300 Seabrook, NH 03874 Seabrook Station                                                     (603) 773-7000 August 4, 2005 Docket No. 50-443 SBK-L-05 172 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Seabrook Station Facility Operating License NPF-86 Response to Request for Additional Information Regarding Seabrook Station, Unit No. 1, Steam Generator Tube Inspection Summary For The Fall 2003 Outage

==References:==
: 1. FPL Energy Seabrook, LLC letter (NYN-03089) to NRC, "Steam Generator Tubes Plugged During The Ninth Inservice Inspection," dated November 3, 2003.
: 2. FPL Energy Seabrook, LLC letter (SBK-L-04040) to NRC, "Steam Generator Inservice Inspection," dated October 12, 2004.
: 3. NRC letter to FPL Energy Seabrook, LLC, "Request for Additional Information Regarding Seabrook Station, Unit No. 1, Steam Generator Tube Inspection Summary For The Fall 2003 Outage (TAC No. MC4907)," dated March 21, 2005.
By letters dated November 3, 2003 (Reference 1) and October 12, 2004 (Reference 2), FPL Energy Seabrook, LLC (FPL Energy Seabrook) submitted the fall 2003 refueling outage steam generator tube plugging and inspection summary reports for Seabrook Station, Unit No. 1, in accordance with the requirements of Technical Specifications 4.4.5.5a and 4.4.5.5b, respectively.
In Reference 3, the NRC requested additional information in order to complete its evaluation.
Enclosed herein is FPL Energy Seabrook's response to the requested additional information.
Should you have any questions regarding this information, please contact Mr. James Peschel, Regulatory Programs Manager, at (603) 773-7194.
an FPL Group company

United States Nuclear Regulatory Commission SBK-L-05 172/Page 2 Very truly yours, FPL Energy Seabrook, LLC Gene F. St. Pierre
                                                               , I Site Vice President Enclosure cc:    S. J. Collins, NRC Region I Administrator V. Nerses, NRC Project Manager, Project Directorate I-2 G. T. Dentel, NRC Resident Inspector Mr. Bruce Cheney, Director New Hampshire Bureau of Emergency Management State Office Park South 107 Pleasant Street Concord, NH 03301-3809

Enclosure to Letter SBK-L-05172 Response To Request For Additional Information Regarding Seabrook Station, Unit No. 1, Steam Generator Tube Inspection Summary For The Fall 2003 Outage

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING SEABROOK STATION, UNIT NO. 1, STEAM GENERATOR TUBE INSPECTION 

==SUMMARY==

FOR THE FALL 2003 OUTAGE RAI 1.
The technical Specifications for Seabrook Station, Unit No. 1 require that you provide the location and percentage of wall thickness for each indication of an imperfection. Your October 12, 2004 submittal does not appear to provide this information for all indications of imperfections (e.g., wear at antivibration bars (AVBs)). If you have not supplied the location and through-wall percent of all imperfections, please provide this information.
FPLE Response:
The listing of locations and percentage of wall thickness for each indication of an imperfection is attached in Table 1. The list of imperfections is sorted by SG, Row, Column and nominal location such as AVBI (anti-vibration bar 1).
RAI 2.
On page 4 of your inservice inspection report, submitted October 12, 2004, you stated that based on inspection data from refueling outage 8 (RF08), AVB wear was an active degradation mechanism in steam generators (SGs) A, B, and D. Subsequently, on page 8 on the report you stated that prior to RF09, AVB wear was classified as an active degradation mechanism in SG D and as on ongoing degradation mechanism in SGs A, B and C. Please clarify which SG's currently have "active" wear.
FPLE Response:
Based on the OR09 inspection, AVB wear does not meet the definition of an active degradation mechanism contained in the EPRI PWR SG Examination Guidelines, Revision 6, in any of the four Seabrook SGs.
The statement on page 4 of the report is in error and should read "prior to OR08, AVB wear was an active damage mechanism in steam generators (SGs) A, B, and D." There was no "active" AVB wear post OR08.
However, the definition of "active" changed between the OR08 and OR09 inspections due to a revision of the EPRI PWR Steam Generator Examination Guidelines. Inspections performed in OR08 were in accordance with Revision 5 of the EPRI guidelines and inspections in OR09 were Page 1 of 42

in accordance with Revision 6 of the EPRI guidelines. When the Revision 6 definition of "Active" was applied to OR08 data for the OR09 Degradation Assessment, only the D Steam Generator was classified active by the new Revision 6 definition.
RAI 3.
On page 7 of your inservice inspection report, you indicated that among the tubes in the critical area (tubes with absolute drift signals), seven indications were detected in three tubes. Subsequently, on page 8 of the same report, you indicated that nine indications were confirmed at seven support plate intersections in three of the six tubes in the defined critical area. Please clarify how many indications of outside tube diameter stress corrosion cracking at tube support plates were identified in your last inspection.
FPLE Response:
The bobbin probe indicated seven Distorted Support Indications (DSI) were present in three tubes. Bobbin probe data, however, is not qualified to determine if more than one indication is present at the same elevation but at a different azimuthal orientation. Rotating pancake coil (RPC) +PointTm examination of the seven DSI locations revealed that two locations had two indications each rather than a single indication. In both of these cases, the indications were located at different broach land contacts around the tube circumference. Therefore, the bobbin probe detected seven indications at seven support plate locations and the RPC +PointfM probe detected nine indications at these support plate locations.
RAI 4.
In Table 2 of your inservice inspection report, you indicated the number of possible loose parts (PLP) identified in the SG's. Subsequently, in Table 7 of the same report, you provided more detailed analysis of PLP indications. There seems to be a difference between the number of PLPs listed in Table 2 and the number of PLPs in Table 7. Please clarify the difference.
FPLE Response:
Table 7 of the in-service report accurately reflects the final data from the OR09 inspection.
However, note that Table 7 also provides historical data from OR08 and that only PLP's at OR09 should be counted to arrive at the number of PLP's in the corrected Table 2 following this response After further review, the original Table 2 provided in the October 2003 Inservice Inspection Report was found to include several errors which are corrected in the revised Table 2 below.
Specifically the following changes have been made to Table 2:
Page 2 of 42
* The number of AVB wear indications has been corrected in all four SGs.
* The number of PLP indications has been corrected for SGs B, C and D.
* The number of volumetric (VOL) indications has been corrected for SGs A and D. Further discussion of this change is provided in the response to RAI 5.
The errors in this table were the result of a transcription error from one report to another.
Table 2 (Revised)
Summary of OR09 Inspection Results I Indication                      Description                       SG A     SG-B        SG-C    SG Dl SATIMAI       OD Axial Cracks (SAI/MAI)                             0        0          0      5/2 PCT 2       AVB % Wear (Bobbin Sizing)(Total/>40%)             320/1     195/1      221/2   567/5 DNG/DNS        Freespan Ding (Total / >5V)                        166/31   205/38      152/31  128/36 DNT 3       Dents at Structures (Total / >5V)                  181/27  982/366     560/143  169/32 PLP        Possible Loose Parts (Number of Tubes)                5        17         3       14 PVN        Permeability Variation (>2V, >1V @ AVBs)              1        0          0       0 VOL        Volumetric Indications - RPC +Point                   4        2          6        1 WAR         Wear (non-crack-like) at FDB and TSP                  1        0          0        1 BLG        Bulge                                                                             24 OXP        Overexpansion                                                                     14
: 1. Numbers are by location and may differ from eddy current (EC) database due to duplicate entries in database.
: 2. PCT calls at non-AVB locations included in other categories.
: 3. The dent reporting criteria were set at 2 Volts compared to 3Volts at OR08. As a result, the number of reported DNT signals is greater at OR09 than it was at OR08.
: 4. These indications were also reported at OR08, but were not included in the condition monitoring (CM) assessment.
RAI 5.
In Table 2 of your inservice inspection report, you provided the number of volumetric (VOL) indications identified in the SGs. Subsequently, on Table 6 of the same report, you provided a more detailed listing of the VOL indications. Not all the VOL indications reported in table 2 appear to be listed in Table 6. For Example, for SG A, you reported five VOL indications while in table 6 you only listed four. Please clarify the discrepancy between the two tables. If there are more VOL indications that identified and discussed in Page 3 of 42

Section 6.4 of your report, please discuss the nature and cause of the "additional" indications.
FPLE Response:
Table 6 of the in-service report accurately reflects the final data for VOL indications from the OR09 inspection. The larger number of VOL indications reported in the original Table reflects a transcription error in transferring data from Table 6 to Table 2. Table 2 was corrected and provided in response to RAI 4.
RAI 6.
In Table 6 of your inservice inspection report, you indicated that for SG C, three new VOL indications were attributed to non-resident foreign objects. Please discuss how these new VOL indications were attributed to foreign objects.
FPLE Response:
The locations of the indications are a significant factor in the attribution of the wear due to foreign objects. Two of the tubes, SG C hot leg R43C26 and R44C26, in addition to being adjacent tubes, are located near the periphery of the bundle, the typical location of where the majority of foreign objects would be expected to be found. The elevation, approximately 0.15" above the tubesheet, is also a typical location of where small objects that fall onto the tubesheet and would be expected to migrate. RPC +Point inspections were performed in all tubes surrounding the subject tubes and no indications of possible foreign objects were detected.
Visual inspection of the periphery also did not identify any resident foreign objects in the area of these tubes.
Tube SG C cold leg R3C1 13 is also located near the periphery, e.g., three rows removed from the tube lane. The indication was reported at 05C-0.56", orjust below the bottom of the tube support plate (TSP). Tube vibration induced wear at the TSPs has not been observed in the Seabrook steam generators, and would also not be expected at this location in the bundle. The quatrefoil TSP holes have sufficient clearance in the lobes to permit a foreign object to enter by means of feedwater flow entrainment, temporarily stay resident and then migrate. The absence of any PLP signal in this or surrounding tubes indicates that the foreign object is no longer resident.
RAI 7.
On page 14 of the report, you indicate that the performance criterion for tube burst is 3774 pounds per square inch (psi). You then indicate that the predicted 90/50 burst pressure at 1022 effective full power days (EFPD) is 3778 psi. Presumably, the calculation was Page 4 of 42

performed for 1022 EFPD since no tube inspections are planned for your next RFO. If no tube inspections are planned for your next RFO, please discuss the following. Given that your predicted burst pressure is close to the performance criterion, please provide a discussion of how this calculation was performed (e.g., growth rates, threshold of detection, material property distributions, etc) and the basis for your assumptions in the analysis.
Given that all tubes are required to meet the performance criterion, please discuss your basis for selecting the 90/50 burst pressure verses a more conservative projection such as 95/95. If a 95/95 burst pressure was used, would the most limiting tube still meet the performance criterion?
FPLE Response:
Performance Acceptance Standards The industry guidelines for integrity assessment, EPRI TR-107621, "Steam Generator Integrity Assessment Guidelines: Revision 1"provide the basis for acceptable probability and confidence.
Section 5.5.1 of these guidelines for Operational Assessment states that:
       "The operationalassessment, or repair, limit is obtainedby addinggrowth to the variablesand requiringthat the measuredflaw have a probabilityof 90% at a confidence level of 50% ofsatisfying the structuralrequirementsat the end of the next operatinginterval."
Also, Section 5.2 of the guidelines states that:
        "The probabilisticcriterionis satisfiedifthe conditionalprobabilityof burst at 3 times the Normal OperatingPressureDifferential (NOPD), or 1.4 times the Limiting Accident DifferentialPressure(LADP) acrossthe tube wvall, whichever is higher, including known and unknown degradationmechanisms, is:
             < 0.1 for the burst of one or more tubes."
For these reasons, the analysis for operational assessment was performed to establish the 90/50 probability/confidence level. The detected mechanism of axial outside diameter stress cracking corrosion (ODSCC) at the tube support plates has been determined to be the single dominant mechanism affecting the steam generators. The other mechanisms involving tube wear have been determined to be not significant to tube integrity so their contribution to burst probability is negligible for the planned operation period. Therefore, meeting the structural and leakage performance criteria for axial ODSCC at the support plates also satisfies the industry guideline requirements for acceptance for each steam generator.
Page 5 of 42

Discussion of Calculations The operational assessment was performed for the planned two cycles of operation between tube examinations, which has a total run time of 2.8 effective full power years or 1022 effective full power days (EFPD). This planned period of operation includes allowances for plant coast down at the end of Cycles 10 and 11. Two operational assessment models were performed to obtain independent assessments of two-cycle operation. These models are known as Single Cycle and Multi Cycle analyses and used the Monte Carlo method to perform the probabilistic assessment. The Single Cycle analysis was the primary analysis for the OR09 operational assessment. The Multi Cycle analysis was performed as independent verification for OR09. Both methods are commonly used in the industry.
The results from the Single Cycle and Multi Cycle analyses show conservative benchmark analyses when comparing the projected OR09 and measured OR09 results. That both analyses reached the same conclusion with regard to satisfying the 90/50 performance standard for three (3) times the Normal Operating Pressure Differential (3NOPD) by separate methodology provide confidence in the results.
The Single Cycle analysis directly utilizes the measured crack distributions, including uncertainties, and applies non-destructive examination (NDE) uncertainties for all burst and leak calculations. The Single Cycle analysis used to justify operation for 1022 EFPD was a full probabilistic Monte Carlo approach as outlined in the EPRI "Steam Generator Integrity Assessment Guidelines: Revision 1." Multiple simulations (200,000) were performed, sampling from distributions and uncertainties of the following parameters:
* Probability of Detection (POD)
* Growth rate
* Material Properties
* Burst Correlation and Relational Uncertainties
* NDE Uncertainties The necessary length and depth data for both Probability of Detection (POD) and growth rate were developed from phase and amplitude based sizing methods to develop depth vs. length profiles. Amplitude sizing was used as the basis for the analysis because it showed good correlation to the destructive examination data. Sizing uncertainties were developed for a data set of industry pulled-tube ODSCC flaws combined with the Seabrook ODSCC flaws.
Both Probability of Detection (POD) and flaw growth rates are based on the physical crack parameters of depth and length. A POD curve was established based on crack area, and growth rates for both depth and length of the flaws were developed using Seabrook-specific and other available industry operating data.
Page 6 of 42

The Probability of Detection (POD) function was developed from the data from a site-specific performance demonstration test for axial ODSCC at tube supports. The data set included seventy-seven (77) pulled tube indications for which destructive examination maximum depth data were available and an additional fifty-nine (59) flaws with destructive examination depth profiles, analyzed by five separate analyst teams. A separate POD function was also developed using the database for ODSCC compiled under the current EPRI Tools-for Tube-Integrity Program by applying the Berens Model Log Linear Correlation. The Berens Model is also a component of the current EPRI Tools-for Tube-Integrity Program. The POD functions developed by these methods showed good agreement; the more conservative function was used in the operational assessment.
Flaw growth rate was originally developed in the Multi Cycle analysis performed for OR08 (the first observance of ODSCC cracks at Seabrook). To validate the use of this growth rate, based on Seabrook data only, a comparison was made between the Seabrook-specific growth rate and the growth rate of axial ODSCC developed for a plant with A600MA tubing with substantial operating experience. Since no successive RPC +Point data were available for Seabrook, the Seabrook bobbin voltage growth rate and average depth growth rate were compared to the bobbin voltage growth rate and average depth growth rate from the A600MA plant. It was determined that the Seabrook voltage and average depth growth rates exceeded those from the A600MA plant; therefore, the use of the growth rate distribution from OR08 was justified. An adjustment was made to the flaw growth rate from the midpoint of the planned 1022 EFPD operating cycle to the end of this cycle to account for a plant uprate planned at RFI0. The predicted temperature increase under the uprated conditions was used to increase the growth rate based on the Arrhenius equation.
The Seabrook-specific material properties are known from a prior study of manufacturing records. Based on this study, the Seabrook-specific mean material properties and population uncertainties were developed for use in the operational analysis. This approach was conservative since the tubes in the critical area (the tubes identified with potentially elevated residual stress) are known to be higher strength tubes than the mean values of the material properties.
An undetected population of flaws was derived from the population of detected flaws using the Probability of Detection function. Since the POD is known for each of the detected flaws from the POD function (POD vs. crack area), the undetected flaw of the same size is 1/POD. For example, if a specific flaw has a POD value of 0.5, the POD function indicates that there are two (2) identical flaws in the bundle, only one of which was detected. Therefore, since the flaw that was detected was plugged, it is assumed that an identical, undetected flaw still remains in the bundle. This process is followed for all of the detected flaws using the POD applicable to each of the detected flaws. Fractional undetected flaws resulting from this process are appropriately carried along by the analysis code. For example, the POD for a large flaw may be 0.9; therefore, the process described would indicate that approximately 0.1 (1/0.9 - 1) of this flaw remains as an undetected flaw in the bundle. These fractional flaws are included in the burst probability calculation for the bundle.
A population of newly initiating flaws was developed by using the population of detected flaws reduced by the average growth over length of the prior cycle. This is conservative since at least some of these "newly initiating" flaws would have been of a size that would have been detected.
Page 7 of 42

The industry burst correlation for axial ODSCC, and the uncertainties for this correlation, were used in the Single Cycle operational analysis.
The profiles of the population of undetected and newly initiating cracks as described above were simulated 200,000 times and the burst and tearing potential of each of the simulated profiles was calculated. After rank ordering in ascending order, the lower 9 0 th percentile of the sorted burst pressures at 50% confidence was compared to the structural criteria, 3NOPD. The upper 9 0 th percentile of the simulated total leak rates was compared to the performance criteria for leakage.
The Multi Cycle analysis follows a theoretical approach starting with initiation rates and tracking detection and growth through multiple cycles and inspections to calculate the probability of burst and leakage. The NDE results and available industry data were used to develop the input distributions in a similar manner as was done in the Single Cycle model.
The parameters for the Weibull initiation model are iterated to obtain a good benchmark comparison between NDE data and calculated results for each cycle. Sizing uncertainty is included in the benchmarking process when comparisons are made between measured (observed) and predicted indication depths. The Multi Cycle analysis established the probability of burst at 3NOPD was 0.063. This computed probability at the end of Cycle 11 satisfies the industry standard of 0.10. The predicted leakage under design basis accidents was negligible. These results confirmed the Single Cycle analysis was conservative.
In summary, both the Single Cycle and Multi Cycle analyses show conservative benchmark analyses when comparing the projected OR09 and measured OR09 results. Both analyses reached the same conclusion, by separate methodologies, therefore providing confidence in the results of the operational assessment.
Use of More Conservative Acceptance Criteria With regard to a 95/95 performance acceptance standard, historically the industry has never used a 95/95 probability/confidence level to be applied to a conservative pressure level of three times normal operating pressure differential in an operational assessment. Instead, the industry has adopted a 90/50 performance standard as the requirement for 3NOPD calculations for both condition monitoring and operational assessment. However, the analysis assumptions used in the Seabrook OR09 operational assessment were conservatively stacked to ensure that there were additional available margins against burst beyond the industry guidelines of 90/50. The conservative assumptions used in the operational assessment for both Single Cycle and Multi Cycle analyses were:
: 1)    The entire tube bundle was conservatively assumed to be equally at-risk for axial ODSCC at the tube support plates and not just tubes in the critical area. The primary root cause of axial ODSCC in 600TT tubing has been established to be due to high residual stress from fabrication. Tubes exhibiting high residual stress have been identified by the Westinghouse screening procedures prior to inspection and have been tracked at each inspection. All identified tubes have now been removed from service by plugging. Therefore, to assume that axial ODSCC remains an active degradation mechanism affecting all the tubes in the bundle is a highly conservative analysis condition. It is more likely that only a small Page 8 of 42

number of potentially susceptible tubes that are just below the screening threshold still remain in service. Further, it would be expected that these tubes would not be as service-sensitive to ODSCC as the tubes already removed from service.
: 2)    The distribution of tubing strengths was established from the mechanical properties of all tubes in the bundles instead of the significantly higher strength properties associated with the population of tubing screened for high residual stress. The higher tube strengths for tubes most affected by ODSCC would result in higher burst pressures and hence lower burst probability.
: 3)    In general, conservative analyses were used to determine the input distributions for probability of detection's and growth rates.
: 4)    Analysis benchmarking to the NDE results gave conservative comparisons for the number of and observed (measured) sizes for the detected population of indications. These conservative benchmarks will lead to conservative predictions for tube burst pressure and leakage over the two-cycle operation period.
In addition to the above, rather than using the fully probabilistic burst model, the Multi Cycle model conservatively used a deterministic burst model that is representative of a lower 5%
tolerance bound to burst pressure correlation. This lower bound burst model has been used in the past to provide additional defense in depth when a new mechanism is detected or when limited data are available. It is known that when a fully probabilistic burst model is used, the probability of burst will be reduced by a dividing factor in the range of three (3) to eight (8).
Given the above analysis conditions, the Single Cycle burst model results can be considered very conservative, and the actual 90/50 burst pressure for the limiting tube will be higher than the reported value of 3778 psi. Further, the Multi Cycle analysis gave a probability of burst of 6.3 %
at 50% confidence, which is well below the industry standard of 10% burst probability. Given the fact that the burst model used in the Multi Cycle model was effectively a lower 5% tolerance bound to the burst pressure correlation, it is expected that a more reasonable yet conservative estimate of probability of burst at end of Cycle 11 for the limiting tube would be significantly lower than 5%.
RAI 8.
On page 14 of the report, you indicated that wear is expected to continue in SG A due to the presence of a foreign object (presumably identified before OR09). In addition, you indicate that a boundary zone was established by plugging all of the tubes adjacent to the tube experiencing wear. This boundary zone is intended to provide adequate margin against potential damage propagation from the foreign object for continued life of the SG.
Please discuss whether the tubes were stabilized and provide a summary of the analysis performed to reach the conclusion that this condition is acceptable for the life of the SG.
For example, if continued tube wear is expected on the one tube next to the foreign object, it appears this tube could sever and then whip around unconstrained (if this tube is not Page 9 of 42

stabilized). This whipping action could impact the adjacent tubes, which are plugged. If these latter tubes are not stabilized, it is not apparent why these tubes could not eventually sever and whip around and cause degradation to their neighboring tubes, which may not be plugged.
FPLE Response:
At OR08, a wear indication was reported on tube R6C2, 1.39" above the 5 th support plate on the hot leg. Examination with the RPC +Point probe also indicated the presence of a foreign object at this location. Bobbin probe and RPC +PointTf examinations of the adjacent tube (R7C2) at the same elevation (5H+1.39") also detected a possible foreign object (PLP). Both of these tubes were plugged. No indication of potential foreign object was found by RPC +Pointf examination of the surrounding tubes; however, all six (6) tubes surrounding R6C2 and R7C2 were also conservatively plugged to provide a buffer area, but none of the tubes was stabilized.
The foreign object could not be visually observed nor removed due to limited access to this location.
The size of this foreign object is small since no PLP indications were reported in any of the surrounding tubes, except the adjacent tube (R7C2). Further, no other wear indications were present on any of the surrounding tubes or on the adjacent tube. While small foreign objects may have the potential to cause leakage due to throughwall wear, they do not have significant potential to cause tube severance because they do not have sufficient mass or size to affect the entire cross section of a given tube. If the foreign object is fixed in place, wear may be a result of tube vibration. Consequently, as the wear progresses, it is self-limiting since the postulated tube displacement is limited by the TSP clearance. Therefore, while this condition may lead to throughwall wear, the degree of wear on the tube will be insufficient to represent a risk of tube separation. (For example, wear of at least 40% through the tube cross-section at an AVB can be shown not to represent a risk of tube separation.) If the tube is assumed to be fixed, and the foreign object is oscillating due to the flow velocity, significant wear into the tube will alter the boundary conditions for the foreign object so that the flow will move the object. Note that the object was at 1.39" above the TSP; therefore a change in boundary conditions would be expected to result, as a minimum, in a change in the elevation of the foreign object. It is not credible that a small foreign object that is mobile can (1) continue to cause wear at the same location on a single tube without moving when a significant change in boundary conditions is postulated, and (2) has sufficient size to wear the entire cross section of a tube to a condition where the tube is at risk of severance.
RAI 9.
With respect to the bulge and overexpansion indications identified in SG D, please discuss whether these indications have changed and the reasons for any change.
Page 10 of 42

FPLE Response:
Two bulge (BLG) indications were reported in tube R22C75 TSC+3.51" and TSC+2.11 in SG-D at OR09. Further examination with the RPC +Point probe showed no degradation at these bulges. The signals have been reported at prior inspection, and comparison of the prior and current signals showed that these indications have not changed.
An overexpansion (OXP) indication was reported in R34C42 at about 1" above the tubesheet.
The indication is not associated with the tubesheet expansion. Comparison of the prior inspection data with the current inspection data confirmed that this indication has not changed since the prior inspection.
Page 11 of 42

TABLE 1 SG-A Listing of AVB Indications Row     Col.       Percent     Nominal Throughwall  Location 17      71           16        AVI 18      58           15        AVI 19      40           30        AVI 19      54           23        AVI 19      58           22        AVI 20      48           15        AVI 23       8           16        AV2 23      36           13        AVI 23      42           21        AV6 23      45           16        AV5 23      59           20        AV2 24       7           13        AVI 24       7           15        AV6 24      59           20        AV2 24      59           20        AV5 24      71           15        AV2 24      71           16        AV5 25       7           19        AVI 25       8           15        AV2 25      56           20        AV2 27      12           16        AV6 27      63           19        AV2 27      93           16        AVI 27     112           11        AV5 28      59           22        AV5 28      59           23        AV2 29      11           20        AV2 29      71           17        AV2 29      82           16        AV6 29      82           22        AV2 29      84           14        AVS 29      94           16        AV2 30      11           10        AVI 30      11           14        AV6 30      11           21        AV5 30      12           17        AV5 30      12           18        AVI 30      12           18        AV6 30      31           17        AV5 30      58           19        AV6 30      58           23        AV5 30      68           16        AVI 30      68           17        AV2 30      95           15        AV6 Page 12 of 42

TABLE I SG-A Listing of AVB Indications Row     Col.        Percent    Nominal Throughwall   Location 30     109            15       AV5 30     109            17       AV6 30     111            18       AVS 31      11            10       AV2 31      11            15        AVS 31      11            18       AV6 31      12            23       AV6 31      12            36       AV5 31      13            20        AV6 31      68            15        AV2 31     105            15        AVI 32      89            15       AVI 32      89            17        AV3 33      14            14       AV2 33      14            17       AVI 33      15            14       AV4 33      15            16       AV6 33      15           20        AV5 33      71            15       AVI 33      71            16       AV2 33     106            14       AVI 34      17            17        AV6 34      17            17        AV3 34      31            17        AVI 34     51             19       AV3 34      51           20        AV2 34      59            18       AV3 34      87           20        AV4 35      14            14       AV6 35      14            15       AV3 35      14            18       AV2 35      14            19       AV4 35      14           20        AVS 35     31             13       AV3 35     31             16       AVS 35      58            18       AV6 35      58           20         AV5 35     58            24        AVI 35     58            27        AV4 35     58            29        AV3 35      58           31        AV2 35      61            16       AV2 35     61            24        AV5 35     61            29        AV4 Page 13 of 42

TABLE 1 SG-A Listing of AVB Indications Row     Col.        Percent    Nominal Throughwall   Location 35      70           13         AV2 35      73           20         AV2 36      60           16         AV2 36      81           22         AV4 36      81           25         AV3 36      81           34         AV2 36      110          13         AV2 37      18           18         AV5 37      87           11         AV5 37      99           17         AV3 37      102          15         AV5 37      105          16         AVI 37      105          19         AV4 38      28           16         AV2 39      63           16         AV3 39      63           19         AV2 39      79           14         AV2 39      79           19         AV3 39      79           22         AV5 39      79           23         AV4 39      80           20         AV3 40      71           20         AV2 40      86           19         AV4 40      86           20         AVI 40      86           20         AV2 40      90           15         AVI 40      90           17         AV6 40      90           23         AV4 40      90           25         AV3 40      90           28         AV2 40      90           35         AV5 40      96           14         AVI 40      102          17         AV3 40      102          19         AV4 40      103          16         AV3 40      103          22         AV5 40      103          22         AV4 41      21           16         AV5 41      21           17         AV3 41      35           18         AV3 41      50           15         AV2 41      50           15         AV5 41      50           18         AV3 41      53           17         AV3 Page 14 of 42

TABLE 1 SG-A Listing of AVB Indications Row     Col.       Percent     Nominal Throughwall   Location 41      53           18         AVI 41      53            19        AVS 41      53           21         AV2 41      53           20         AV4 41      54           21         AV3 41      54           22         AV2 41      58           13         AVI 41      58           14         AV3 41      58            15        AV2 41      58            15        AV5 41      58            19        AV4 41      59            12        AV5 41      59           20         AV3 41      59           21         AV2 41      68            17        AV6 41      68           20         AV2 41      68           22         AV5 41      68           22         AV4 41      68           28         AV3 41      78           21         AV3 41     102            18        AV4 41     102           22         AV5 41     103            14        AV3 41     103            17        AVI 41     103            19        AV4 41     103           23         AV5 42      26            14        AV5 42      58            12        AV5 42      58            16        AV4 42      58           25         AV3 42      72           15          V6 42      72            18        AVI 42      72            18        AV4 42      72           22         AV2 42      72           29         AV5 42      72           34         AV3 42      80            18        AV5 42      80           21         AV4 42      80           27         AV2 42      80           27         AV6 42      80           30         AV3 42      81           21         AV4 42     103           18         AVI 43      55           19         AV2 Page 1S of 42

TABLE I SG-A Listing ofAVB Indications Row     Col.        Percent   Nominal Throughwall  Location 43      77           24        AV6 43      77           25        AV3 43      77           35        AV5 43      77           38        AV4 43      98           19        AV5 44      94           14        AV2 44      94           23        AV3 44      98           16        AV4 44      98           17        AV5 44      98           18        AVI 44      98           19        AV3 44      98           21        AV2 44     100           16        AV5 44     101           17        AVI 44     102           16        AV3 45      67           20        AV2 45      74           21        AVI 45      74           21        AV2 45      74           23        AV3 45      74           33        AV4 45      76           17        AVI 45      98            17       AV4 46      26            15       AV4 46      28            15       AV4 46      65           20        AV4 46      65           21        AV5 46      71            16       AV4 46      71            16       AV5 46      77           15        AV5 46      77           15        AV3 46      77           20        AV2 46      77           22        AV4 46      94           14        AV6 46      95           22        AV5 46      95           25        AV6 46      98           16        AV6 46      98            18       AV5 46      98           21        AV4 47      30            16       AV4 47      31            16       AV2 47      34           15        AV3 47      85           24        AV5 47      95            14       AV6 47      95            15       AVI Page 16 of 42

TABLE I SG-A Listing of AVB Indications Row     Col.         Percent   Nominal Throughwall   Location 47      95            17        AV5 47      95            20        AV3 47      95            20        AV2 47      95            21        AV4 47      96            20        AV2 47      96            23        AV6 47      96            38        AV3 47      96            40        AV4 47      98        \   16        AV5 48      31            13        AV4 48      31            16        AV3 48      31      '     17        AVI 48      31            18        AV6 48      32            16        AV4 48      63            15        AVI 48      63            17        AV2 48      63            21        AV5 48      63            22        AV3 48      63            27        AV4 48      64            25        AV2 48      83            21        AV4 48      94            17        AV6 48      94            17        AV4 48      95            19        AV5 48      95            23        AV6 48      96            19        AV6 49      28             19       AV2 49      57            15        AV6 49      57             15       AV4 49      63             17.      AV3 49      63             19       AV4 49      63             19       AV2
-49      63            30        AV5 49      64            27        AVI 49      65            20        AV4 49      65            24        AV2 49      65            24        AV3 49      67             17       AV6 49      67             18       AV5 49      67             18       AVi 49      67            27        AV2 49      67            27        AV4 49      67            33        AV3 49      76            20        AV2 Page 17 of42

TABLE I SG-A Listing of AVB Indications Row     Col.       Percent    Nominal Throughwall  Location 49      88            17       AV6 49      88           25        AV4 49      88           25        AV3 49      88           28        AV5 50      28            14       AV2 50      28            17       AV5 50      38            16       AV4 50      38           22        AV5 50      65            17       AV3 50      65            16       AV5 50      65           24        AV4 50      79           30        AV3 50      79           30        AV4 50      80            16       AV5 50      80            19       AV3 50      80            17       AV4 50      85            16       AV2 50      85           21        AV5 50      85           21        AV6 50      85           27        AV3 50      85           28        AV4 50      88           25        AV6 50      95           22        AV3 50      95           24        AV4 50      95           31        AV6 50      95           34        AV5 51      53            14       AV4 51      75            17       AV5 51      86            16       AV3 51      86           28        AV2 51      90            14       AV3 51      90            16       AV6 51      90           24        AV4 51      90           24        AV5 52      53            14       AV4 52      53            16       AV2 52      73            17       AV5 52      88           20        AV3 52      88           24        AV6 52      88           28        AV5 52      88           34        AV4 52      89           26        AV4 52      89           26        AV5 52      89           31        AV6 Page 18 of 42

TABLE 1 SG-A Listing of AVB Indications Row     Col.        Percent         Nominal Throughwall        Location 52      90           21              AV6 53      45           22              AV3 53      45           27              AV2 53      69           14              AV5 53      90           18              AV4 54      48           18              AVI 54      86           17              AV2 55      41           22              AV6 56      57           18              AV2 56      81           18              AV4 57      53           16              AVI 57      61           17              AV2 SG A Non AVB Imperfections Row        Col.         Percent Throughwall 49         29             18 50         29             8 36             19 1         87            22 1         91             16 Page 19 of 42

TABLE 1 Seabrook OR09; SG-B Listing of AVB Indications Row Col.          Percent      Nominal
_   Throughwall     Location 15  68              17          AVI 17  64              23          AVI 17  77              15          AVI 18  64              28          AVI 18  64              41          AV6 18  74              21          AVI 19  66              18          AVI 21  68              18          AVI 21  77              19          AVI 22  69              17          AVI 22  89              20          AV2 22  89              21          AV6 22  116             12          AVI 23  47              16          AV2 23  47              20          AVI 23  56              17          AVI 23  56              19          AV2 25  51              17          AVI 25  51              19          AV2 27  57              20          AV2 27  63              22          AV5 27  81              18          AV5 27  107           . 12          AV6 27  107             15          AV5 27  112             16          AVI 28  42              18          AV5 28  78              22          AV2 28  115             12          AV2 28  115             14          AV5 29  38              18          AV2 29  51              18          AV2 29  79              15          AV6 29  79              25          AV2 29  79              26          AV5 29  79              30          AVI 29  113             13          AV6 29  113             15          AVI 30  43              18          AV2 30  43              20          AV6 30  43              23          AV5 30  49              17          AV2 30  58              14          AV5 30  61              21          AV2 30  61              32          AV5 Page 20 of 42

TABLE 1 Seabrook OR09; SG-B Listing of AVB Indications Row Col.         Percent       Nominal Throughwall     Location 30  62             18           AV2 30  66             16           AV6 30  66             19           AVI 30  66             19           AV2 30  66             24           AV5 30  73             17           AV5 30  75             25           AV5 30  75             30           AV2 30  80             14           AVI 30  80             21           AV5 30  80             24           AV2 30  81             28           AV2 30  81             31          AV5 30  87             24          AV2 30  87             31          AV5 30 106             19          AV6 30 111             19          AV2 30 111             19          AV5 30 112             21          AV5 30 112             23          AV2 31  52             19          AV5 31  66             16          AV6 31 111             14          AV5 31 112             22          AV2 32  82             14          AV6 32  82             15          AV5 32  82             24          AV2 32  83             22          AV5 32  86             17          AV3 32  86             19          AV4 32  88             20          AV3 32  88             21          AV2 32 109             15          AV6 32 109             20          AV5 33 107             18          AV5 33 109             20          AV4 33 109             31          AV5 34  14             19          AV5 34  14             19          AV6 34  70             18          AV3 34  70             20          AV2 34  72             23          AV2 34  94             20          AV5 34  98             17          AV3 34 103             17          AV5 Page 21 of 42

TABLE 1 Seabrook OR09; SG-B Listing of AVB Indications Row Col.         Percent       Nominal Throughwall     Location 34 103             21          AV6 34 105             18          AV6 35 44              16          AV2 35 44              17          AVI 35  55             26          AV4 35  58             10          AV2 35  58             17          AV4 35  58             17          AV5 35 58              19          AV3 35  59             17          AV3 35 59              22          AV2 35  67             16          AV2 35  68             16          AVI 35  68             22          AV2 35  68             22          AV3 35  68             25          AV4 35  68             29          AV5 36  59             17          AV2 36  64             18          AV3 36  64             19          AV4 36  65             18          AV4 36  65             22          AV3 36 65              27          AV5 36 65              35          AV2 37 54              15          AV2 37  54             21          AV4 37 69             21           AV2 37 87              18          AV2 38 66              14          AVI 39 48              14          AV2 39 48              17          AV4 39 48              17          AV5 39 48              21          AV3 39 49              15          AV4 39 49              20          AVI 39 49              26          AV2 39 49              26          AV3 39 54              17          AV2 39 54              17          AV3 39 54              20          AVS 39  54             21          AV4 39  57             16          AV4 39 57              18          AV2 39 60              19          AVI 39 60              20          AV2 Page 22 of 42

TABLE I Seabrook OR09; SG-B Listing of AVB Indications Row Col.         Percent       Nominal Throughwall     Location 39  60            26            AV3 40  48             10           AVI 40  48            22            AV6 40  48            27            AV5 40  48            29            AV4 40  48            30            AV2 40  48            34            AV3 40  74             19           AV2 41  61             16           AV5 41  61             17           AV2 41  61            25            AV4' 41  75            20            AV2 41  75            25            AV3 42  64             13           AV2 42  81            21            AV2 43  69            20            AV3 43  69            21            AV2 43  69            22            AV4 43  69            23            AV5 43  70             15           AV3 43  75             19           AV3 43  75            23            AV2 43  75            27            AV5 43  75            31            AV4 44  62             13           AV4 45  41             19           AV3 45  41             21           AV2 45  41             21           AV4 45  86             22           AVI 46  50             12           AV6 46  50             19           AV2 46  50             23           AV3 46  50             24           AV4 46  50             30           AV5 46  66             14           AV3 47  71             18           AVI 47  71             18           AV4 47  71             20           AV2 47  71             27           AV3 48  25             21           AV5 49  96             19           AV4 50  36             14           AV6 50  68             17           AV3 50  95             22           AV6 51  70             22           AV6 Page 23 of 42

TABLE 1 Seabrook 0R09; SG-B Listing of AVB Indications Row      Col.         Percent            Nominal Throughwall         Location 53       34             26               AV6 53       44             19               AV6 53       90             23               AV5 54       66             23               AV3 54       86             16.              AV5 54       87             26               AV5 56       68             18               AV2 56       71             21               AV2 56       82             25               AV5 57       68             15               AV5 58       48             17               AV6 58       50             13               AV4 58       68             13               AV2 58       76             16               AV4 58       76             17               AV3 59       68             16               AV3 SG B Non AVB Imperfections Column       Row           Percent Throughwall 1          87             36 1          87             35 Page 24 of 42

TABLE 1 Seabrook OR09; SG-C Listing of AVB Indications Row Col.         Percent       Nominal Throughwall     Location 10  64             11          AVI 11  67             14          AVI 11  72             14           AVI 15  67             19           AVI 22   5             15          AV6 22  34             13           AV2 24   7             14           AVI 24  98             12           AVI 24  98             12           AV6 26   8             15           AVI 28   8             11           AV6 28  66             16           AV2 30  11             15           AVI 30  11             17           AV5 30 113            24            AV2 30 113             16           AV6 30 114             14           AV2 30 114             12           AV5 31 111             18           AV5 32  17             11           AVI 33 106            21            AV4 33 111             16           AV2 33 111             19           AV5 34  28             13           AV4 34  28             10           AV5 35  13            23            AV2 35  13             15           AV4 35  13            20            AV5 35  13             18           AV6 35  39            25            AV2 35  39            22            AV3 35  39            21            AV4 35  39             19           AV5 35  73             13           AV2 37  23             15           AV5 37  40             15           AV3 37  40             14           AV6 37  56             17           AV2 37  85             16           AV2 37  85             14           AV3 37  85             17           AV4 37  85             17           AV5 37  85             18           AV6 38  79             16           AV2 38 101             17           AV6 38 102             17           AV5 39  42             19           AV2 Page 25 of 42

TABLE 1 Seabrook OR09; SG-C Listing of AVB Indications Row Col.         Percent       Nominal Throughwall     Location 39  42             11           AV4 39  45             18           AV2 39  45             16           AV3 39  45            20            AV4 39  45            23            AV5 39  45             14           AV6 39  49            34            AV2 39 49             25            AV3 39  49            20            AV4 39  49            28            AVS 39  53             18           AV2 39  53            25            AV3 39  53            28            AV4 39  53             15           AV5 39  53             17           AV6 39  69            21            AV2 39  69             15           AV3 39  69            23            AV4 39  69             17           AV5 40  39             19           AV2 40  39            40            AV4 40  39            25            AV5 40  46             16           AVI 40  46             14           AV2 40  46             12           AV3 40  46             17           AV4 40  46            25            AVS 40  46             15           AV6 41  22             16           AV2 41  22             17           AV3 41  22             15           AV5 41  23             15           AVI 41  23             16           AV5 41  30             12           AV4 41  30             17           AV5 41  30             16           AV6 41  39             16           AV2 41  39             15           AV6 41  41             12           AVI 41  41            23            AV2 41  41             13           AV3 41  41             14           AV4 41  43             15           AV2 41  43             13           AV3 41  43             18           AV4 41  80             16           AV2 41  80            24            AV3 41  80             16           AV5 Page 26 of42

TABLE 1 Seabrook OR09; SG-C Listing of AVB Indications Row Col.         Percent       Nominal Throughwall      Location 41 93              11           AVI 41 93              16           AV4 41 93              17           AV5 41 100             11           AVI 41 100            18            AV3 41 100            15            AV4 41 100            23            AV5 41 100             13           AV6 42 23              19           AV4 42 23             26            AVS 42 25             15            AV4 42 25             17            AV5 42 25             15            AV6 42 31             11            AVI 42 31             21           AV2 42 31              13          AV3 42  66            24            AVI 42  66            32            AV2 42  66            29            AV3 42  66            22           AV4 42 66              17           AV6 42 71              17           AV2 42 71              18          AV5 42 72             20           AVI 42 72             32           AV2 42 72             28           AV3 42 72             40           AV4 42 72             39            AV5 42 92             17            AV2 42 92             13            AV3 42 92             11           AV4 42 92             15            AV5 42 102            14            AV1 42 102            30            AV3 42 102            30            AV4 42 102            15           AV5 42 102            22            AV6 43 23             21           AV3 43 23              19           AV4 43 68              13           AV3 43 100            14           AV2 43 100            29           AV4 43 100            16            AV5 43 102            19            AV3 43 102            29            AV 43 102            30            AV5 43 102            15            AV6 44 75             17            AVI Page 27 of42

TABLE 1 Seabrook OR09; SG-C Listing of AVB Indications Row Col.         Percent       Nominal Throughwall     Location 44  75             19           AV2 44 100            22            AV3 44 100            30            AV4 44 100            30            AV5 46  36             18           AV2 46  36            20            AV3 46  36            22            AV4 46 36              18           AV5 46  79             17           AV2 46  79            20            AV3 46  79            23            AV4 46  79             18           AV6 46  97             15           AV3 46  97            21            AV4 47  30             16           AV5 47  35             14           AV2 47  35             18           AV3 47  35             18           AV4 47  40             13           AV3 47  67             16           AVI 47  67            31            AV2 47  67            26            AV3 47  67            24            AV4 47  67            26            AV5 47  76             17           AV2 47  83             18           AV5 47  86             18           AV5 47  93            21            AV3 47  93            22            AV4 47  93            29            AV5 47  94             15           AV2 47  94             16           AV3 47  94             19           AV4 47  94             12           AV5 47  94             16           AV6 47  96             15           AV5 47  98             13           AV3 47  98             14           AV4 47  99             14           AV4 47  99            29            AV5 47  99            26            AV6 48  33             16           AV5 48  35             18           AV4 48  96             14           AV2 48  96             15           AV3 48  96            39            AV4 48  96            27            AV5 48  96            29            AV6 Page 28 of42

TABLE 1 Seabrook OR09; SG-C Listing of AVB Indications Row    Col.           Percent           Nominal Throughwall          Location 48     97                15              AV3 48     97                14              AV4 49     95               28               AV5 51     45               28               AV2 51     45               28               AV3 51     45                18              AV5 51     51                15              AV3 51     51                16              AV4 51     51               25               AV5 51     69               32               AV4 51     69               39               AV5 51     69               23               AV6 51     84               32               AV2 53     33                14              AV3 53     35                13              AV2 53     67               27               AV2 53     67               30               AV3 53     67               25               AV4 53     70                16              AVI 53     70               21               AV2 53     70                16              AV3 54     35                17              AV4 54     68                16              AV2 54     87                17              AV3 54     87                17              AV4 54     87               25               AV5 55     39                16              AVI 56     65                19              AV3 57     50                15              AV2 57     77                14              AV5 SG C Non AVB Imperfections Row l       Col.           Percent l_ _        l    Throughwall 43           26             20 44           26             10 1           87             28 1           87             33 1          112             21 3          113             29 Page 29 of 42

TABLE 1 Seabrook OR09; SG-D Listin of AVB Indications Row Col.        Percent       Nominal Throughwall     Location 14   7            13           AVI 15   7            11           AVI 15 79             13           AVI 16   7            17           AVI 17   7            17           AVI 17 72             16           AVI 17 75             16           AV6 20  11            12           AV6 21  11            18           AV2 21  11            19           AV5 21 31             12           AVI 22 86              17          AV2 22 93              18          AV6 23  11             18          AV2 23  11             17          AV6 24   6            20           AVI 24   6            21           AV6 25 82             16           AV2 25 82             20           AV5 26   8             18          AVI 26   8            21           AV6 26  11             19          AV6 26 40             17           AV5 26 41             18           AV2 27   8             15          AVI 27   8            27           AV6 27  13            16           AV2 27 36             17           AV5 27 39             26           AV2 27 39             27           AV5 27 39             23           AV6 27 44             25           AV2 27 76             15           AVI 27 76             17           AV2 27 89             14           AVI 27 96             21           AV6 27 102             12          AVI 27 111             16          AV5 27 115            22           AV2 27 115             16          AV5 28  11             15          AV6 28  88             18          AV5 28 115            10           AV2 28 115            15           AV5 Page 30 of 42

TABLE 1 Seabrook OR09; SG-D Listing of AVB Indications Row Col.         Percent        Nominal Throughwall       Location 29 34             26             AV2 29  34            24             AV5 29  79             15            AV6 29  83             14            AVI 29  83             17            AV5 29 100             19            AVI 29 112             13            AV6 30  12             15            AVI 30  12             16            AV5 30  66            23             AV5 31  13             15            AVI 31 23              15            AVI 31  23             15            AV6 31 113             15            AVI 32  11             11            AVI 32  12             17            AVI 32  12             15            AV2 32  12             16            AV3 32  12            38             AV5 32  28             13            AV3 33  15             13            AV6 33  58             15            AVI 33  58             16            AV2 33  96             17            AVI 33  96             18            AV2 34  15             17            AVI 34  15            20             AV4 34  15             15            AV5 34  17             13            AV2 34  17             15            AV3 34 22              19            AV3 34  22             16            AV6 34 28              14            AV4 34  30             16            AV3 34  30             15            AV5 34  35             17            AV2 34 35              16            AV5 34 40              16            AV5 34 40              16            AV6 34 48              18            AV5 34  50             18            AV3 34  69            25             AV2 34  69             16            AV3 34  69             18            AV4 34  69             16            AV5 34  70             13            AV2 Page 31 of 42

TABLE 1 Seabrook OR09; SG-D Listin of AVB Indications Row Col.         Percent      Nominal Throughwall     Location 34 71             18           AV2 34 73             21           AV2 34 73              16          AV4 34 73              19          AV5 34 76             16           AV2 34 92              13          AV4 34 109            27           AV5 35  15            14           AV6 35 28              12          AV5 35 37             28           AV2 35 37             22           AV3 35 37             14           AV6 35 51             19           AVI 35  69            34           AV2 35 69             34           AV3 35 69             18           AV4 35  69            12           AV5 35  69             16          AV6 35 71             12           AVI 35 71             16           AV2 35  83            18           AV3 35 83             17           AV4 35 86             11           AV2 35  86             15          AV3 35  86            15           AV4 35 86             16           AV6 35 88             13           AV2 35 88             12           AV3 35 88             18           AV4 35 89             20           AV2 35 89             12           AV3 35 96             12           AV6 36  13            14           AV4 36  13            15           AV6 36  16            19           AV3 36 38             14           AV4 36 40             19           AV2 36 40             19           AV3 36 40             17           AV4 36 40             16           AV5 36 40             18           AV6 36 41             20           AV2 36 46             19           AVS 36 67             22           AV2 36 80             12           AV3 36 82             18           AVI Page 32 of 42

TABLE 1 Seabrook OR09; SG-D Listing of AVB Indications Row  Col.         Percent        Nominal Throughwall       Location 36   82            29             AV2 36   82            21             AV3 36   82            24             AV4 36   82            26             AV5 36   90             14            AV2 37   16             18            AVI 37   16            21             AV3 37   16             22            AV4 37   16             15            AV6 37   34             17            AV2 37   36             16            AVI 37   36            23             AV2 37   36            20            AV3 37   36            31            AV4 37   36            36             AV5 37   36            20             AV6 37   38             15            AV2 37   38             15           AV3 37   38            21            AV4 37   38             16           AV5 37   39             17            AV2 37   39            20            AV3 37   39            21            AV4 37   39            21            AV5 37   39             14           AV6 37   40             17           AV4 37  45             21            AV2 37   45             19           AV4 37 .48              12           AVI 37   48            23            AV3 37   48             19           AV4 37   48             15           AV5 37   58            20            AV2 37   59            23            AV2 37   59             18           AV3 37   59            23            AV4 37   59             19           AV5 37   73             14           AV2 37   77             16           AVI 37  77             20            AV2 37  77             30            AV3 37  77             30            AV4 37   77             19           AV5 37   77             13           AV6 37   84             18           AV4 37   84            20            AV6 Page 33 of 42

TABLE 1 Seabrook OR09; SG-D Listing of AVB Indications Row Col.         Percent       Nominal Throughwall      Location 38  19             13           AV4 38  19             16           AV6 38 35              18           AV6 38 73              16           AV2 38 73             21            AV3 38 73             23            AV4 38 73              18           AVS 39  18            21            AV5 39  19             18           AVI 39  19            20            AV2 39  19            24            AV3 39  19             15           AV6 39 23              15           AV5 39 36             23            AV5 39 38              13           AV3 39 41             20            AV2 39 41             25            AV4 39 41             20            AV5 39 41              18           AV6 39 44              18           AV4 39 44             25            AV5 39 48              13           AV5 39 50             21            AV3 39 50             21            AV5 39 57              14           AVI 39 57             28            AV2 39 57             24            AV3 39 57             21            AV4 39 57              18           AV5 39 62             21            AV2 39 74              16           AV2 39 75              16           AV2 39 82              14           AVI 39 82             21            AV2 39 82             20            AV3 39 82              14           AV4 39 82              16           AV5 39 89             19            AVI 39 94             21            AV2 39 94              15           AV3 39 94              16           AV4 39 96             16            AV5 39 102            20            AVI 40 19              16           AV6 40 21              16           AVI 40 21              15           AV4 Page 34 of 42

TABLE 1 Seabrook OR09; SG-D Listin of AVB Indications Row Col.         Percent       Nominal Throughwall      Location 40 21              IS           AV6 40 23              17          AVI 40 23              15           AV4 40 26              18           AV3 40 29              15           AV2 40 38              12           AV3 40 38              13          AV4 40 59              17          AV3 40 59              17           AV4 40 66             33            AV2 40 66             26            AV3 40 66             23            AV4 40 66             28            AV5 40 66             23            AV6 40 80             27           AV2 40 80             21           AV3 40 80             40           AV4 40 80             27            AVS 40 80             21           AV6 40 92              17          AV3 41  18            23           AV4 41 20             22           AV2 41 20             20           AV3 41 20             22           AV4 41 20             28           AV5 41 20              16          AV6 41 23              15          AV4 41 23              16          AV6 41 29              16          AV2 41 29              16          AV3 41 34              18          AV2 41 34              18          AV3 41 34              17          AV4 41 35             29           AV3 41 36              16          AVI 41 36             24           AV3 41 38              17          AV2 41 38             23           AV3 41 38              15          AVS 41 51              18          AV2 41 51              15          AV3 41 56              15          AVI 41 56             33           AV2 41 56             22           AV3 41 56             21           AV4 41 56             31           AVS Page 35 of 42

TABLE 1 Seabrook OR09; SG-D Listin of AVB Indications Row Col.         Percent       Nominal Throughwall      Location 41  56            22            AV6 41 59             20            AV4 41 66             33            AV2 41 66             26            AV3 41 66             13            AV4 41  66            19            AV5 41 71             19            AV2 41 87              11           AV4 41 96             13            AV2 41 96             14            AV4 41 104            17            AV2 41 104            19            AV5 42  19            14            AVI 42  19            13            AV2 42  19            21            AV3 42  19            18            AV4 42  19             18           AV5 42  19             13          AV6 42 20             14           AV6 42 24             30            AV4 42 31             16            AV3 42 37             28            AV2 42 37             27           AV3 42 37             19           AV4 42 37             15           AV6 42 39             17           AV3 42 39             21           AV4 42 40             16           AV3 42 40             17           AV6 42 46             29           AV3 42 46             25           AV4 42 46             23            AV5 42 47             18            AV3 42 47             12           AV4 42 47             12           AV5 42 49             13           AVI 42 49             18           AV2 42 49             32           AV3 42 49             38           AV4 42 49             41           AV5 42 49             18           AV6 42 52             11           AVI 42 52             31           AV2 42 52             26           AV3 42 52             22           AV4 42 52             41           AV5 Page 36 of42

TABLE 1 Seabrook OR09; SG-D Listing of AVB Indications Row Col.         Percent        Nominal Throughwall       Location 42  52            25             AV6 42 77             19             AV5 42 92             16             AVI 42  92             16            AV3 42 92              18            AV4 42 92             20             AV5 42 92             17             AV6 42 98              18            AV3 42  98             18            AV4 42 98             19             AV5 42 98             15             AV6 43 21             13             AVI 43 21             21             AV2 43 21             26             AV3 43  21            20             AV4 43  21            26             AV5 43  21            28             AV6 43  27             15            AV5 43  27             14            AV6 43 51              16            AV2 43  51            21             AV3 43  51             10            AV4 43  51            27             AVS 44  26            20             AV2 44 26              14            AV3 44 26             20             AV4 44 26              17            AV5 44  27             15            AV5 44  36            21             AVI 44 36             20             AV2 44  36            22             AV3 44 45             29             AV3 44 45             25             AV5 44 45              14            AV6 44 46              15            AV2 44 48             30             AV3 44 48              18            AV4 44 48             25             AV5 44  62             18            AV3 44  91            23             AV2 44  91            33             AV3 44  91            29             AV4 44  91            28             AV5 44  91             16            AV6 44  92             16            AV3 44 101             18            AV3 Page 37 of 42

TABLE 1 Seabrook OR09; SG-D Listin of AVB Indications Row Col.         Percent       Nominal Throughwall      Location 45  22             16           AV5 45  27             17           AVS 45  28             18           AV6 45  29             16           AV2 45  29             16           AV5 45 32              18          AV2 45 40             23           AV5 45 40              15           AV6 45  66             15           AVI 45  66            23            AV2 45  66             19           AV3 45  94            20            AV3 46 25             21            AVS 46 25             21            AV6 46 27             14            AV3 46  30            20            AV3 46 30             32           AV4 46 30             33            AV5 46 30              15           AV6 46 32              13           AV2 46 32             14           AV6 46 38              17           AV2 46 38              18           AV3 46 38             30            AV4 46 38             19            AV5 46 38             16            AV6 46 39             22            AV4 46 39             32           AV5 46 39             18           AV6 46 42             24            AV4 46 42             30            AV5 46 42             16           AV6 46 51             22           AVI 46 51             28           AV2 46 51             23            AV3 46 51             32           AV4 46 51             31            AV5 46  60            18           AV4 46 60             14           AV5 46 88             16            AV4 46 97              1S           AV2 47 24             18            AV3 47 29             15            AV4 47 29             14            AV5 47 30             15           AV2 47 32             11           AVI Page 38 of 42

TABLE 1 Seabrook OR09; SG-D Listin of AVB Indications Row Col.         Percent       Nominal Throughwall      Location 47  34             14           AV3 47  38             17           AV6 47  44            36            AV2 47  44            29            AV3 47  44            33            AVS 47  44            43            AV6 47  49            28            AV2 47  49            20            AV3 47  53            23            AV4 47  53            28            AV5 47  53            22            AV6 47  59            23            AVI 47  59            39            AV2 47  59            24            AV3 47  59            33            AV4 47  59            21            AVS 47  61            21            AV6 47  75            21            AVI 47  75            21            AV2 47  75            29            AV3 47  75            25            AV4 47  75            33            AVS 47  88             12           AV4 47  92             12           AVI 47  92             14           AV3 47  97             16           AV3 47  97             18           AV5 48  25             15           AV3 48  28            20            AV2 48  28            36            AV3 48  28            37            AV4 48  28            29            AVS 48  28             15           AV6 48 29              16           AV3 48  30             14           AVI 48  30             12           AV3 48  32            20            AV6 48  38             16           AVI 48 41              10           AVI 48 47              15           AV6 48  65            22            AV4 48  90             12           AV3 48  92             15           AV3 48  94             16           AV2 48 94              17           AV3 49  27             16           AV3 Page 39 of 42

TABLE 1 Seabrook OR09; SG-D Listing of AVB Indications Row Col.         Percent        Nominal Throughwall       Location 49  27             15            AV5 49  28            23             AV5 49  28             14            AV6 49  34             18            AV6 49  36             18            AV2 49  36            20             AV4 49  36             19            AV5 49  36             15            AV6 49  38             18            AV4 49 40              17            AV3 49 40             20             AV6 49 42             22             AV6 49 43              17            AVI 49 43              18            AV2 49 43              19            AV5 49 43             20             AV6 49  52            32             AV2 49  52            25             AV3 49  52            23             AV4 49  52             19            AV5 49  52            21             AV6 49  55             19            AVI 49  55             18            AV2 49  69            24             AVI 49  69            27             AV2 49  69            35             AV3 49  69            43             AV4 49  69            32             AV5 49  69            27             AV6 49  81            26             AV4 49  81            20             AV5 49  86             15            AV3 49  86             17            AV5 49  87            20             AV3 49 87             24             AV4 49 94              17            AV2 49 94              15            AV3 49 94             21             AV5 49 94             19             AV6 49 96             15             AV2 50 30             17             AV6 50 32             17             AV6 50 34             20             AV4 50 34             18             AV5 50 35              19            AV5 50 50             24             AV4 Page 40 of 42

TABLE 1 Seabrook OR09; SG-D Listing of AVB Indications Row Col.         Percent        Nominal Throughwall       Location 50  94             20            AV3 50  94             16            AV4 50  94             23            AV5 50 94              28            AV6 51  31             15            AV6 51 35              16            AV3 51 47              17            AV4 51 55              13            AV5 51 62              17            AV2 51 92              17            AV4 52 33              34            AV4 52 33              23           AV5 52 33              21           AV6 52 35              21           AV2 52 35              33            AV3 52 35              32            AV5 52 35              20            AV6 52 40              20           AV5 52 42              12           AV5 52 44              21            AV2 52 44              22           AV3 52 44              36           AV4 52 44              33           AV5 52 86              15           AV3 53 34              15           AV4 53 35              17           AV3 53 43              17           AV2 53 62              18           AVI 53 86              14           AV5 54 35              16           AV2 54 38              17           AV4 54 43              17           AV2 54 87              16           AV4 55 39              17           AV3 55 39              18           AV6 55 41              17           AV2 55 51              16           AVS 55 56              17           AVI 55 74              14           AVS 55 78              16           AV2 56 41              29           AV2 56 41             35            AV4 56 41             29            AV5 56 41             21            AV6 56 43              12           AVI 56 52              14           AV4 Page 41 of 42

TABLE I Seabrook OR09; SG-D Listing of AVB Indications Row Col.         Percent         Nominal Throughwall       Location 56  69             21             AV4 56  69             26             AV5 56  69            23              AV6 56  80             19             AV2 56  81            20              AV5 56  81             21             AV6 56  82             15             AV2 56  82             15             AV5 57  49             13             AV5 57  65             15             AVI 58  49             17             AVI 58  49             14             AV4 58  75             18             AV5 58  75             18             AV6 59  56             17             AVI 59  63             18             AVI 59  66            24              AVI SG D Non AVB Imperfections Row Col.        Percent          Nominal Throughwall        Location 13  4             23              O1C 1 32             26              O1H Page 42 of 42}}