L-08-072, Transmittal of Technical Specification 5.6.6.1 - Steam Generator Inspection Report: Difference between revisions

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* Plus Point probe inspection of any ambiguous bobbin coil signals P "As- left" video inspection of the hot and cold leg channel heads Secondary side inspection scope involved the following:
* Plus Point probe inspection of any ambiguous bobbin coil signals P "As- left" video inspection of the hot and cold leg channel heads Secondary side inspection scope involved the following:
* Secondary side visual inspections of the top-of-tubesheet annulus, blowdown pipe region and random in-bundle locations
* Secondary side visual inspections of the top-of-tubesheet annulus, blowdown pipe region and random in-bundle locations
     " In-bundle visual inspections of possible loose part locations identified from the analysis of the eddy current data
     " In-bundle visual inspections of possible loose part locations identified from the analysis of the eddy current data L-08-072 Page 2 of 7
 
L-08-072 Page 2 of 7
: b. Active degradation mechanisms found No active degradation mechanisms were reported during the 1R1 8 SG tube examinations.
: b. Active degradation mechanisms found No active degradation mechanisms were reported during the 1R1 8 SG tube examinations.
: c. Nondestructive          examination        techniques      utilized    for  each      degradation mechanism For 1R1 8, bobbin coil probes were used as the primary method of degradation detection except in those areas of the tube (e.g. at or below TTS, low row U-bends) where bobbin probes are not qualified. In those areas of the tube, Plus Point probes were employed. Plus Point probes were also used to re-examine any ambiguous bobbin coil signals.
: c. Nondestructive          examination        techniques      utilized    for  each      degradation mechanism For 1R1 8, bobbin coil probes were used as the primary method of degradation detection except in those areas of the tube (e.g. at or below TTS, low row U-bends) where bobbin probes are not qualified. In those areas of the tube, Plus Point probes were employed. Plus Point probes were also used to re-examine any ambiguous bobbin coil signals.
Line 47: Line 45:
96004.1 1 Coil Plus Point        21409.1 Bobbin              96001.1 Tube Wear                TSP Intersections        3 Coil Plus Point        21998.1 Bobbin              96008.1 Periphery/Blowdown lane        3 Coiuin                  998.1 Tube Wear                                          3 Coil Plus Point        21998.1 Bobbin              96010.1 MBM's                Free Span Area of Tubing      3 Coil Plus Point        21409.1 Bobbin              96008.1 Volumetric                  Full Length            3 Coil Plus Point        21998.1
96004.1 1 Coil Plus Point        21409.1 Bobbin              96001.1 Tube Wear                TSP Intersections        3 Coil Plus Point        21998.1 Bobbin              96008.1 Periphery/Blowdown lane        3 Coiuin                  998.1 Tube Wear                                          3 Coil Plus Point        21998.1 Bobbin              96010.1 MBM's                Free Span Area of Tubing      3 Coil Plus Point        21409.1 Bobbin              96008.1 Volumetric                  Full Length            3 Coil Plus Point        21998.1
     -The applicable EPRI Examination Technique Specification Sheets (ETSS) are listed for reference only. Site-specific examination technique sheets are developed prior to each SG inspection in accordance with Appendix H of the EPRI SG Examination Guidelines (Revision 6).
     -The applicable EPRI Examination Technique Specification Sheets (ETSS) are listed for reference only. Site-specific examination technique sheets are developed prior to each SG inspection in accordance with Appendix H of the EPRI SG Examination Guidelines (Revision 6).
L-08-072 Page 3 of 7
L-08-072 Page 3 of 7
: d. Location, orientation (if linear), and measured sizes (if available) of service-induced indications The following tables provide examination results for tubes with service-induced indications in each SG. All indications listed with I-codes (e.g., distorted support plate signals with indications (DSIs), non-quantifiable indications (NQIs), dents with indications (DNIs), etc,) were re-inspected with the Plus Point Probe. Ifthe Plus Point probe indicated that no degradation/flaws were present, the tube remained in service. Ifdegradation/flaws were reported from the Plus Point examination the tube was removed from service via plugging.
: d. Location, orientation (if linear), and measured sizes (if available) of service-induced indications The following tables provide examination results for tubes with service-induced indications in each SG. All indications listed with I-codes (e.g., distorted support plate signals with indications (DSIs), non-quantifiable indications (NQIs), dents with indications (DNIs), etc,) were re-inspected with the Plus Point Probe. Ifthe Plus Point probe indicated that no degradation/flaws were present, the tube remained in service. Ifdegradation/flaws were reported from the Plus Point examination the tube was removed from service via plugging.
SG 1RC-E-1A Row Col        Ind  Volts Phase    %TW Chan        Loc    Inch  Length    Angle    From      To 2    61    NQI  2.11      70            6      06C  47.43                      07C    TEC 2    61    NDF                            6      06C  47.43                      06C    07C 8    30    NQI    1.56    39            6      06H  47.00                      TEC    TEH 8    30    NDF                            6      06H  47.00                      06H    07H 8    31    NQI    1.71    40            6      07H  -1.66                      TEC    TEH 8    31    NDF                            6      07H  -1.66                      06H    07H 8    32    NQI    1.5    58            6      07H    1.90                      TEC    TEH 8    32    NDF                            2      07H    1.90                      07H    07H 12    47    DNI  0.38    150            5      TSC  25.03                      TEC    TEH 12    47    NDF                            6    TSC    25.03                      TSC    01C 26    29    DNI  0.61    165            P1      06H  -0.02                      TEC    TEH 26    29    NDF                            6      06H  -0.02                      06H    06H 32    26    DNI  0.28    146            5      02H  28.80                      TEC    TEH 32    26    NDF                            6      02H  28.80                      02H    03H 33    25    FSI  0.42      48            3      06C    8.08                      TEC    TEH 33    25    NDF                            6      06C    8.08                      05C    07C 33    25    FSI  0.27      29            3      06C  14.92                      TEC    TEH 33    25    NDF                            6      06C  14.92                      05C    07C 33    25    FSI    0.11    44            3      06C  22.82                      TEC    TEH 33      25  NDF                            6      06C  22.82                      05C    07C 33      25    FSI    0.44    37            3      05C  47.14                      TEC    TEH 33      25  NDF                            6      05C  47.14                      05C    07C SG 1RC-E-1B Row      Col    Ind  Volts  Phase %TW      Chan    Loc    Inch  Length  Angle    From    To 39      52    DNI    0.28    156          P1      AV3      0                      TEC    TEH 39      52    NDF                            2    AV3      0                      AV3    AV3
SG 1RC-E-1A Row Col        Ind  Volts Phase    %TW Chan        Loc    Inch  Length    Angle    From      To 2    61    NQI  2.11      70            6      06C  47.43                      07C    TEC 2    61    NDF                            6      06C  47.43                      06C    07C 8    30    NQI    1.56    39            6      06H  47.00                      TEC    TEH 8    30    NDF                            6      06H  47.00                      06H    07H 8    31    NQI    1.71    40            6      07H  -1.66                      TEC    TEH 8    31    NDF                            6      07H  -1.66                      06H    07H 8    32    NQI    1.5    58            6      07H    1.90                      TEC    TEH 8    32    NDF                            2      07H    1.90                      07H    07H 12    47    DNI  0.38    150            5      TSC  25.03                      TEC    TEH 12    47    NDF                            6    TSC    25.03                      TSC    01C 26    29    DNI  0.61    165            P1      06H  -0.02                      TEC    TEH 26    29    NDF                            6      06H  -0.02                      06H    06H 32    26    DNI  0.28    146            5      02H  28.80                      TEC    TEH 32    26    NDF                            6      02H  28.80                      02H    03H 33    25    FSI  0.42      48            3      06C    8.08                      TEC    TEH 33    25    NDF                            6      06C    8.08                      05C    07C 33    25    FSI  0.27      29            3      06C  14.92                      TEC    TEH 33    25    NDF                            6      06C  14.92                      05C    07C 33    25    FSI    0.11    44            3      06C  22.82                      TEC    TEH 33      25  NDF                            6      06C  22.82                      05C    07C 33      25    FSI    0.44    37            3      05C  47.14                      TEC    TEH 33      25  NDF                            6      05C  47.14                      05C    07C SG 1RC-E-1B Row      Col    Ind  Volts  Phase %TW      Chan    Loc    Inch  Length  Angle    From    To 39      52    DNI    0.28    156          P1      AV3      0                      TEC    TEH 39      52    NDF                            2    AV3      0                      AV3    AV3 L-08-072 Page 4 of 7 SG 1RC-E-1C Row  Col  Ind Volts Phase %TW Chan      Loc  Inch  Length    Angle From  To 11*  2  DSI  0.23  114          P1    04H  0.34                  TEC  TEH 11*  2  PCT .0.22  114  29    P4    04H  0.39  0.21      26  04H  04H 43  44  NQI 2.11    65            6    02H  14.99                TEC  TEH
 
L-08-072 Page 4 of 7 SG 1RC-E-1C Row  Col  Ind Volts Phase %TW Chan      Loc  Inch  Length    Angle From  To 11*  2  DSI  0.23  114          P1    04H  0.34                  TEC  TEH 11*  2  PCT .0.22  114  29    P4    04H  0.39  0.21      26  04H  04H 43  44  NQI 2.11    65            6    02H  14.99                TEC  TEH
  .43  44  NDF                      6    02H  14.99                02H  03H 44  36  DNI  0.31  169          P1    TSC  18.62                TEC  TEH 44  36  NDF                      6    TSC  18.62                TSH  FBC
  .43  44  NDF                      6    02H  14.99                02H  03H 44  36  DNI  0.31  169          P1    TSC  18.62                TEC  TEH 44  36  NDF                      6    TSC  18.62                TSH  FBC
* Row 11, Column 2 was administratively removed from service.
* Row 11, Column 2 was administratively removed from service.
L-08-072 Page 5 of 7 Description of Column Headings and Data Abbreviations Used in Tables in Item d Report Header Definitions Term                                    Definition Row/Col        Row & Column of tube location Ind        Type of indication (See data analysis acronyms below)
L-08-072 Page 5 of 7 Description of Column Headings and Data Abbreviations Used in Tables in Item d Report Header Definitions Term                                    Definition Row/Col        Row & Column of tube location Ind        Type of indication (See data analysis acronyms below)
Volts        Voltage amplitude of an indication Phase        Angular rotation of indication
Volts        Voltage amplitude of an indication Phase        Angular rotation of indication
           %TW          Percent through wall of indication Chan          Frequency channel from which indication was recorded Loc          Location of nearest support structure Inch        Indication distance from nearest support structure Length        Field measured crack length Angle          Field measured crack phase angle From          Starting point of examination To          End point of examination Examination Extent Definitions (From - To)
           %TW          Percent through wall of indication Chan          Frequency channel from which indication was recorded Loc          Location of nearest support structure Inch        Indication distance from nearest support structure Length        Field measured crack length Angle          Field measured crack phase angle From          Starting point of examination To          End point of examination Examination Extent Definitions (From - To)
Term                                  Definition FBC          Flow Distribution Baffle - Cold Leg Side TEH        Tube End - Hot Leg TSH          Hot Leg Tubesheet TEC        Tube End Cold Leg TSC          Cold Leg Tubesheet 01H          1st Tube Support Plate on Hot Leg Side 01C        Ist Tube Support Plate on Cold Leg Side AV1          1st Anti-Vibration Bar (Numbered hot leg to cold leg)
Term                                  Definition FBC          Flow Distribution Baffle - Cold Leg Side TEH        Tube End - Hot Leg TSH          Hot Leg Tubesheet TEC        Tube End Cold Leg TSC          Cold Leg Tubesheet 01H          1st Tube Support Plate on Hot Leg Side 01C        Ist Tube Support Plate on Cold Leg Side AV1          1st Anti-Vibration Bar (Numbered hot leg to cold leg)
L'08-072 Page 6 of 7
L'08-072 Page 6 of 7
: e. Number of tubes plugged during the inspection outage for each active degradation mechanism As stated above, no active degradation mechanisms were reported during 1R1 8.
: e. Number of tubes plugged during the inspection outage for each active degradation mechanism As stated above, no active degradation mechanisms were reported during 1R1 8.
Line 68: Line 61:
Based on the 1 R18 inspection results, the SG tubing is expected to meet all operational, structural and leakage integrity requirements at the end of Cycle 19. No, indications were reported during 1R1 8 that could possibly represent a leakage potential at postulated main steam line break conditions. As such, in-situ proof or leakage testing was not required during 1R18 and no tubes or tube sections were removed (pulled).
Based on the 1 R18 inspection results, the SG tubing is expected to meet all operational, structural and leakage integrity requirements at the end of Cycle 19. No, indications were reported during 1R1 8 that could possibly represent a leakage potential at postulated main steam line break conditions. As such, in-situ proof or leakage testing was not required during 1R18 and no tubes or tube sections were removed (pulled).
: h. The effective plugging percentage for all plugging in each SG Listed below are the plugging percentages for each SG post 1R1 8. Since no sleeves have been installed to date, the effective plugging percentage is not applicable.
: h. The effective plugging percentage for all plugging in each SG Listed below are the plugging percentages for each SG post 1R1 8. Since no sleeves have been installed to date, the effective plugging percentage is not applicable.
SG                                Tubes Plugged                % Plugged 1RC-E-1A                          0                            0.00 1RC-E- B                          0                            0.00 1RC-E-1C                          1                            0.01
SG                                Tubes Plugged                % Plugged 1RC-E-1A                          0                            0.00 1RC-E- B                          0                            0.00 1RC-E-1C                          1                            0.01 L-08-072 Page 7 of 7 Definitions of Abbreviations, Codes and Reporting Terminology 3 Letter Code Definitions Term                      Bobbin Coil Definitions DNI                Dent/Ding with a Possible Indication DSI        Distorted Support Signal with Possible Indication FSI                        Free Span Indication MBM                    Manufacture's Burnish Mark NQI                    Non-Quantifiable Indication Term                      Plus Point Definitions NDF                        No Degradation Found Additional Definitions Term                      Definition AVB                  Anti-Vibration Bar DENT  Indentation Observed within Tube Support Plate DING    Indentation Observed in Free-Span Region EPRI          Electric Power Research Institute NEI              Nuclear Energy Institute PCT                Percent Through Wall PWSCC. Primary Water Stress Corrosion Cracking TSP                  Tube Support Plate TTS                  Top of Tubesheet}}
 
L-08-072 Page 7 of 7 Definitions of Abbreviations, Codes and Reporting Terminology 3 Letter Code Definitions Term                      Bobbin Coil Definitions DNI                Dent/Ding with a Possible Indication DSI        Distorted Support Signal with Possible Indication FSI                        Free Span Indication MBM                    Manufacture's Burnish Mark NQI                    Non-Quantifiable Indication Term                      Plus Point Definitions NDF                        No Degradation Found Additional Definitions Term                      Definition AVB                  Anti-Vibration Bar DENT  Indentation Observed within Tube Support Plate DING    Indentation Observed in Free-Span Region EPRI          Electric Power Research Institute NEI              Nuclear Energy Institute PCT                Percent Through Wall PWSCC. Primary Water Stress Corrosion Cracking TSP                  Tube Support Plate TTS                  Top of Tubesheet}}

Latest revision as of 05:39, 13 March 2020

Transmittal of Technical Specification 5.6.6.1 - Steam Generator Inspection Report
ML080800448
Person / Time
Site: Beaver Valley
Issue date: 03/18/2008
From: Sena P
FirstEnergy Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
L-08-072
Download: ML080800448 (8)
v • d • e


Text

FENOC FirstEnergyNuclear OperatingCompany Peter P. Sena III 724-682-5234 Site Vice President Fax: 724-643-8069 March 18, 2008 L-08-072 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001

SUBJECT:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Technical Specification 5.6.6.1 - Steam Generator Inspection Report In accordance with Beaver Valley Power Station Unit No. 1 Technical Specification (TS) 5.6.6.1, information related to steam generator inspections is provided in Attachment 1.

There are no regulatory commitments contained in this letter. If there are any questions or if additional information is required, please contact Mr. Thomas A. Lentz, Manager -

FENOC Fleet Licensing, at 330-761-6071.

Sincerely, Peter P. Sena III Attachments:

1. Technical Specification 5.6.6.1 - Unit 1 SG Tube Inspection Report cc: Mr. S. J. Collins, NRC Region I Administrator Mr. D. L. Werkheiser, NRC Senior Resident Inspector Ms. N. S. Morgan, NRR Project Manager Mr. D. J. Allard, Director BRP/DEP Mr. L. E. Ryan (BRP/DEP)

ATTACHMENT 1 L-08-072 Beaver Valley Power Station Unit No. 1 Technical Specification 5.6.6.1 - Unit 1 SG Tube Inspection Report Page 1 of 7 The following information satisfies the reporting requirement of Beaver Valley Power Station Technical Specification (TS) 5.6.6.1. Refer to the tables on Page 7 of this attachment which define abbreviations, codes and other terms used throughout this report.

Information required by Technical Specification 5.6.6.1 Technical Specification 5.6.6.1 requires reporting within 180 days after the initial entry into MODE 4 following completion of an inspection performed in accordance with Specification 5.5.5.1, Unit 1 Steam Generator (SG) Program. Information required by TS 5.6.6.1, Items a through h is provided below for the maintenance and refueling outage in the fall of 2007 (1R1 8).

a. The scope of inspections performed on each SG Primary side inspection scope involved the following:
  • 100% full length bobbin coil probe examination (Row*3 through Row 47)
  • 100% bobbin coil probe examination of the hot and cold leg straight sections in Row 1 and 2 up to and including the top support plate
  • 100% Plus Point probe inspection of the Row 1 and 2 U-bends from the top support plate on the hot leg to the top support plate on the cold leg
  • 100% Plus Point probe inspection of over-expansions and bulges contained within or just above the hot leg tubesheet (These were previously reported during the preservice examination and are located 10.0" or higher from the hot leg tube end)
  • 100% Plus Point probe inspection of bobbin coil indications that could possibly represent degradation (I-codes)
  • Plus Point probe inspection of the top-of-tubesheet periphery (3 tubes deep in any row or column) and the blowdown pipe region (2 tubes deep on either side of the blowdown pipe)
  • Plus Point probe inspection of any ambiguous bobbin coil signals P "As- left" video inspection of the hot and cold leg channel heads Secondary side inspection scope involved the following:
  • Secondary side visual inspections of the top-of-tubesheet annulus, blowdown pipe region and random in-bundle locations

" In-bundle visual inspections of possible loose part locations identified from the analysis of the eddy current data L-08-072 Page 2 of 7

b. Active degradation mechanisms found No active degradation mechanisms were reported during the 1R1 8 SG tube examinations.
c. Nondestructive examination techniques utilized for each degradation mechanism For 1R1 8, bobbin coil probes were used as the primary method of degradation detection except in those areas of the tube (e.g. at or below TTS, low row U-bends) where bobbin probes are not qualified. In those areas of the tube, Plus Point probes were employed. Plus Point probes were also used to re-examine any ambiguous bobbin coil signals.

All examination techniques utilized during the 1R1 8 SG tube inspections were qualified for detection of the relevant and potential degradation mechanisms listed in the 1R1 8 degradation assessment. This qualification is in accordance with Appendix H of the EPRI SG Examination Guidelines, Revision 6. Examination techniques used for detection of degradation are tabulated below.

Examination Techniques Used for Detection of Degradation Degradation Mode I Tube Location Probe EPRI ETSS*

Bobbin 96008.1 Free Span Area of Tubing 3 oiuin 2109.1 General Degradation 3 Coil Plus Point 21409.1 PWSCC Tubesheet Region 3 Coil Plus Point 20511.1 Tube Wear AVB Locations Bbi Bobbin, 60.

96004.1 1 Coil Plus Point 21409.1 Bobbin 96001.1 Tube Wear TSP Intersections 3 Coil Plus Point 21998.1 Bobbin 96008.1 Periphery/Blowdown lane 3 Coiuin 998.1 Tube Wear 3 Coil Plus Point 21998.1 Bobbin 96010.1 MBM's Free Span Area of Tubing 3 Coil Plus Point 21409.1 Bobbin 96008.1 Volumetric Full Length 3 Coil Plus Point 21998.1

-The applicable EPRI Examination Technique Specification Sheets (ETSS) are listed for reference only. Site-specific examination technique sheets are developed prior to each SG inspection in accordance with Appendix H of the EPRI SG Examination Guidelines (Revision 6).

L-08-072 Page 3 of 7

d. Location, orientation (if linear), and measured sizes (if available) of service-induced indications The following tables provide examination results for tubes with service-induced indications in each SG. All indications listed with I-codes (e.g., distorted support plate signals with indications (DSIs), non-quantifiable indications (NQIs), dents with indications (DNIs), etc,) were re-inspected with the Plus Point Probe. Ifthe Plus Point probe indicated that no degradation/flaws were present, the tube remained in service. Ifdegradation/flaws were reported from the Plus Point examination the tube was removed from service via plugging.

SG 1RC-E-1A Row Col Ind Volts Phase %TW Chan Loc Inch Length Angle From To 2 61 NQI 2.11 70 6 06C 47.43 07C TEC 2 61 NDF 6 06C 47.43 06C 07C 8 30 NQI 1.56 39 6 06H 47.00 TEC TEH 8 30 NDF 6 06H 47.00 06H 07H 8 31 NQI 1.71 40 6 07H -1.66 TEC TEH 8 31 NDF 6 07H -1.66 06H 07H 8 32 NQI 1.5 58 6 07H 1.90 TEC TEH 8 32 NDF 2 07H 1.90 07H 07H 12 47 DNI 0.38 150 5 TSC 25.03 TEC TEH 12 47 NDF 6 TSC 25.03 TSC 01C 26 29 DNI 0.61 165 P1 06H -0.02 TEC TEH 26 29 NDF 6 06H -0.02 06H 06H 32 26 DNI 0.28 146 5 02H 28.80 TEC TEH 32 26 NDF 6 02H 28.80 02H 03H 33 25 FSI 0.42 48 3 06C 8.08 TEC TEH 33 25 NDF 6 06C 8.08 05C 07C 33 25 FSI 0.27 29 3 06C 14.92 TEC TEH 33 25 NDF 6 06C 14.92 05C 07C 33 25 FSI 0.11 44 3 06C 22.82 TEC TEH 33 25 NDF 6 06C 22.82 05C 07C 33 25 FSI 0.44 37 3 05C 47.14 TEC TEH 33 25 NDF 6 05C 47.14 05C 07C SG 1RC-E-1B Row Col Ind Volts Phase %TW Chan Loc Inch Length Angle From To 39 52 DNI 0.28 156 P1 AV3 0 TEC TEH 39 52 NDF 2 AV3 0 AV3 AV3 L-08-072 Page 4 of 7 SG 1RC-E-1C Row Col Ind Volts Phase %TW Chan Loc Inch Length Angle From To 11* 2 DSI 0.23 114 P1 04H 0.34 TEC TEH 11* 2 PCT .0.22 114 29 P4 04H 0.39 0.21 26 04H 04H 43 44 NQI 2.11 65 6 02H 14.99 TEC TEH

.43 44 NDF 6 02H 14.99 02H 03H 44 36 DNI 0.31 169 P1 TSC 18.62 TEC TEH 44 36 NDF 6 TSC 18.62 TSH FBC

  • Row 11, Column 2 was administratively removed from service.

L-08-072 Page 5 of 7 Description of Column Headings and Data Abbreviations Used in Tables in Item d Report Header Definitions Term Definition Row/Col Row & Column of tube location Ind Type of indication (See data analysis acronyms below)

Volts Voltage amplitude of an indication Phase Angular rotation of indication

%TW Percent through wall of indication Chan Frequency channel from which indication was recorded Loc Location of nearest support structure Inch Indication distance from nearest support structure Length Field measured crack length Angle Field measured crack phase angle From Starting point of examination To End point of examination Examination Extent Definitions (From - To)

Term Definition FBC Flow Distribution Baffle - Cold Leg Side TEH Tube End - Hot Leg TSH Hot Leg Tubesheet TEC Tube End Cold Leg TSC Cold Leg Tubesheet 01H 1st Tube Support Plate on Hot Leg Side 01C Ist Tube Support Plate on Cold Leg Side AV1 1st Anti-Vibration Bar (Numbered hot leg to cold leg)

L'08-072 Page 6 of 7

e. Number of tubes plugged during the inspection outage for each active degradation mechanism As stated above, no active degradation mechanisms were reported during 1R1 8.

However, one tube (R1 1 C2 in SG "C") was administratively removed from service-due to a wear indication. The indication was located at the upper edge of the 4 th hot leg support plate and is believed to be caused by a burr remaining from the broaching process used during fabrication of the support plate.

f. Total number and percentage of tubes plugged to date The total number of tubes plugged post 1 R1 8 is 1 tube (0.01%). To date, no tubes have been repaired (sleeved).
g. The results of condition monitoring, including the results of tube pulls and in-situ testing During the 1R18 SG tube inspections, no indications were observed that exceeded the structural integrity limits for either axial or circumferential degradation (i.e., burst integrity > 3 times normal operating primary to secondary pressure differential). No tubes were found to contain indications that could potentially challenge the tube integrity requirements of NEI 97-06, Revision 2, "Steam Generator Program Guidelines."

Based on the 1 R18 inspection results, the SG tubing is expected to meet all operational, structural and leakage integrity requirements at the end of Cycle 19. No, indications were reported during 1R1 8 that could possibly represent a leakage potential at postulated main steam line break conditions. As such, in-situ proof or leakage testing was not required during 1R18 and no tubes or tube sections were removed (pulled).

h. The effective plugging percentage for all plugging in each SG Listed below are the plugging percentages for each SG post 1R1 8. Since no sleeves have been installed to date, the effective plugging percentage is not applicable.

SG Tubes Plugged  % Plugged 1RC-E-1A 0 0.00 1RC-E- B 0 0.00 1RC-E-1C 1 0.01 L-08-072 Page 7 of 7 Definitions of Abbreviations, Codes and Reporting Terminology 3 Letter Code Definitions Term Bobbin Coil Definitions DNI Dent/Ding with a Possible Indication DSI Distorted Support Signal with Possible Indication FSI Free Span Indication MBM Manufacture's Burnish Mark NQI Non-Quantifiable Indication Term Plus Point Definitions NDF No Degradation Found Additional Definitions Term Definition AVB Anti-Vibration Bar DENT Indentation Observed within Tube Support Plate DING Indentation Observed in Free-Span Region EPRI Electric Power Research Institute NEI Nuclear Energy Institute PCT Percent Through Wall PWSCC. Primary Water Stress Corrosion Cracking TSP Tube Support Plate TTS Top of Tubesheet

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