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| {{#Wiki_filter:Mr. C. R. Pierce Regulatory Affairs Director UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 1 O, 2015 Southern Nuclear Operating | | {{#Wiki_filter:Mr. C. R. Pierce Regulatory Affairs Director UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 1 O, 2015 Southern Nuclear Operating Company, Inc. Post Office Box 1295, Bin -038 Birmingham, AL 35201-1295 |
| : Company, Inc. Post Office Box 1295, Bin -038 Birmingham, AL 35201-1295
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| ==SUBJECT:== | | ==SUBJECT:== |
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| VOGTLE ELECTRIC GENERATING PLANT, UNIT 1 (VEGP) -REQUEST FOR ADDITIONAL INFORMATION ON SPRING 2014 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MF4987) | | VOGTLE ELECTRIC GENERATING PLANT, UNIT 1 (VEGP) -REQUEST FOR ADDITIONAL INFORMATION ON SPRING 2014 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MF4987) |
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| ==Dear Mr. Pierce:== | | ==Dear Mr. Pierce:== |
| By letter dated October 3, 2014 (Agencywide Documents Access and Management System Accession No. ML 14276A430), | | By letter dated October 3, 2014 (Agencywide Documents Access and Management System Accession No. ML 14276A430), Southern Nuclear Operating Company (the licensee, SNC) submitted information summarizing the results of the spring 2014 steam generator inspedions performed at Vogtle Electric Generating Plant, Unit 1. These inspections were performed during refueling outage 18. We have determined that additional information is needed, as noted below, in order to complete the review. 1. SNC's letter stated that some of the indications identified during this outage have been present for several cycles. Please clarify whether the indications found on the tubes at row 24, column 66 (R24C66), R40C57, and R49C89 were present in prior inspections since they do not seem to have been reported in previous inspection reports. 2. Previously, an indication was reported in R32C35 in SG 2. During RFO 18, this indication was not reported. |
| Southern Nuclear Operating Company (the licensee, SNC) submitted information summarizing the results of the spring 2014 steam generator inspedions performed at Vogtle Electric Generating Plant, Unit 1. These inspections were performed during refueling outage 18. We have determined that additional information is needed, as noted below, in order to complete the review. 1. SNC's letter stated that some of the indications identified during this outage have been present for several cycles. Please clarify whether the indications found on the tubes at row 24, column 66 (R24C66), | | Please discuss. 3. Please confirm that 199 indications of anti-vibration bar (AVB) wear were detected in 110 tubes in SG 4. Please confirm that 128 indications of AVB wear were detected in 75 tubes in SG 1. 4. SNC's letter stated that some indications in SG 2 were inspected during RFO 18. Were only the indications actually listed in Table 5 inspected? |
| R40C57, and R49C89 were present in prior inspections since they do not seem to have been reported in previous inspection reports. | |
| : 2. Previously, an indication was reported in R32C35 in SG 2. During RFO 18, this indication was not reported.
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| Please discuss. | |
| : 3. Please confirm that 199 indications of anti-vibration bar (AVB) wear were detected in 110 tubes in SG 4. Please confirm that 128 indications of AVB wear were detected in 75 tubes in SG 1. 4. SNC's letter stated that some indications in SG 2 were inspected during RFO 18. Were only the indications actually listed in Table 5 inspected?
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| Were those inspections performed using only a rotating probe? If more inspections were performed, please discuss the scope and results of those inspections (include all information required by the technical specifications for these inspections). | | Were those inspections performed using only a rotating probe? If more inspections were performed, please discuss the scope and results of those inspections (include all information required by the technical specifications for these inspections). |
| * 5. In Table 5 of SNC's letter, there are several indications in SG 2 at the baffle plates. Please discuss the cause <?f these indications (e.g., pressure pulse cleaning). | | * 5. In Table 5 of SNC's letter, there are several indications in SG 2 at the baffle plates. Please discuss the cause <?f these indications (e.g., pressure pulse cleaning). |
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| C.R. Pierce 8. At the bottom of page E-2 of SNC's report, two wear indications are discussed. | | C.R. Pierce 8. At the bottom of page E-2 of SNC's report, two wear indications are discussed. |
| Please discuss the cause of these indications. | | Please discuss the cause of these indications. |
| If the suspected cause is a loose part or foreign object, were any visual inspections performed to ensure the part was no longer present? | | If the suspected cause is a loose part or foreign object, were any visual inspections performed to ensure the part was no longer present? If not, how was the integrity of this tube assessed for future operation (since eddy current examinations may not detect a part that has moved away from the tube or |
| If not, how was the integrity of this tube assessed for future operation (since eddy current examinations may not detect a part that has moved away from the tube or | |
| * that is nonconducting)? | | * that is nonconducting)? |
| Docket No. 50-424 cc: Distribution via Listserv Sincerely, Y'Robert Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation | | Docket No. 50-424 cc: Distribution via Listserv Sincerely, Y'Robert Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation |
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| C.R. Pierce 8. At the bottom of page E-2 of SNC's report, two new wear indications are discussed. | | C.R. Pierce 8. At the bottom of page E-2 of SNC's report, two new wear indications are discussed. |
| Please discuss the cause of these indications. | | Please discuss the cause of these indications. |
| If the suspected cause is a loose part or foreign object, were any visual inspections performed to ensure the part was no longer present? | | If the suspected cause is a loose part or foreign object, were any visual inspections performed to ensure the part was no longer present? If not, how was the integrity of this tube assessed for future operation (since .eddy current examinations may not detect a part that has moved away from the tube or that is nonconducting)? |
| If not, how was the integrity of this tube assessed for future operation (since .eddy current examinations may not detect a part that has moved away from the tube or that is nonconducting)? | |
| Docket No. 50-424 cc: Distribution via Listserv DISTRIBUTION: | | Docket No. 50-424 cc: Distribution via Listserv DISTRIBUTION: |
| PUBLIC LPL2-1 R/F RidsAcrsAcnw_MailCTR Resource RidsNrrLASFigueroa Resource RidsNrrPMVogtle Resource ADAM s Accession No.: ML 15062A447 OFFICE DORL/LPL2-1 | | PUBLIC LPL2-1 R/F RidsAcrsAcnw_MailCTR Resource RidsNrrLASFigueroa Resource RidsNrrPMVogtle Resource ADAM s Accession No.: ML 15062A447 OFFICE DORL/LPL2-1 |
| /PM DORL/LPL2-1 | | /PM DORL/LPL2-1 |
| /LA NAME RMartin SFigueroa DATE . 03/10/15 03/09/15 Sincerely, | | /LA NAME RMartin SFigueroa DATE . 03/10/15 03/09/15 Sincerely, /RA/ Robert Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation RidsNrrDorlDpr Resource RidsNrrDorllpl2-1 Resource RidsRgn2MailCenter Resource AJohnson, NRR DE/ESGB/BC DORL/LPL2-1 |
| /RA/ Robert Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation RidsNrrDorlDpr Resource RidsNrrDorllpl2-1 Resource RidsRgn2MailCenter Resource | |
| : AJohnson, NRR DE/ESGB/BC DORL/LPL2-1
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| /BC GKulesa RPascarelli 02/23/15* | | /BC GKulesa RPascarelli 02/23/15* |
| 03/10/15 | | 03/10/15 |
| * Bv memo dated. DORL/LPL2-1/PM RMartin 03/10/15 OFFICIAL RECORD COPY}} | | * Bv memo dated. DORL/LPL2-1/PM RMartin 03/10/15 OFFICIAL RECORD COPY}} |
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Category:Letter
MONTHYEARML24032A0252024-02-0505 February 2024 NRC Initial Test Program and Operational Programs Integrated Inspection Report 05200026-2023009 ML24010A0712024-01-31031 January 2024 Exemption from Select Requirements of 10 CFR Part 73 (Security Notifications, Reports and Recordkeeping and Suspicious Activity Reporting) ML24031A6102024-01-31031 January 2024 Cyber Security Inspection Report 05200026/2024401 - Public ML24029A0592024-01-30030 January 2024 Request for Withholding Information from Public Disclosure Responses to NRC Request for Additional Information for Refueling Outage 1R24 Steam Generator Tube Inspection Report Enclosure 2, GAE-NRCD-RF-LR-000002 P-Attachment, Rev. 0 ML24016A1132024-01-30030 January 2024 Correction of Unit 1 Amendment Nos. 96 and 190 and Unit 2 Amendment Nos. 74 and 173 Adoption of Standard Technical Specifications Westinghouse Plants NL-24-0031, Inservice Inspection Program Owner'S Activity Report (OAR-1) for Outage 2R232024-01-29029 January 2024 Inservice Inspection Program Owner'S Activity Report (OAR-1) for Outage 2R23 IR 05000424/20244032024-01-26026 January 2024 Information Request for the Cyber-Security Baseline Inspection, Notification to Perform Inspection 05000424/2024403; 05000425/2024403 NL-24-0020, Plan, Unit 1 Responses to NRC Request for Additional Information for Refueling Outage 1R24 Steam Generator Tube Inspection Report2024-01-22022 January 2024 Plan, Unit 1 Responses to NRC Request for Additional Information for Refueling Outage 1R24 Steam Generator Tube Inspection Report ML23347A2092024-01-17017 January 2024 Voluntary Requests for Data, Information, And/Or Observation ML23279A0042024-01-17017 January 2024 Amendment No. 194 to Remove Combined License Appendix C NL-23-0926, Correction of Technical Specification Typographical Error2024-01-12012 January 2024 Correction of Technical Specification Typographical Error ML23341A2042024-01-12012 January 2024 Request for Additional Information Exemption Requests for Physical Barriers (EPID L-2023-LLE-0018 & L-2023-LLE-0021) ML23345A1312024-01-0303 January 2024 Withholding Letter - SNC Fleet - Physical Barriers Exemption (L-2023-LLE-0018 and L-2023-LLE-0021) ML23317A2072023-12-22022 December 2023 Issuance of Amendments 223 and 206 Regarding Revision to Technical Specifications to Adopt TSTF-339-A, Relocate Technical Specification Parameters to the COLR Consistent with WCAP-1448 ML23335A1222023-12-19019 December 2023 Safety Evaluation Regarding Implementation of Mitigating Strategies Related to Order EA-12-049 (EPID L-2023-LRQ-0002) - Letter ML23353A1702023-12-19019 December 2023 LAR-22-002, TS 3.8.3 Inverters Operating Completion Time Extension Letter ML23310A2922023-12-0707 December 2023 Issuance of Amendment for Exception to Regulatory Guide 1.163, LAR 23 007 ML23339A1812023-12-0707 December 2023 Correction Letter Regarding License Amendment Request: More Restrictive Action for Technical Specification 3.1.9 ML23338A2182023-12-0606 December 2023 Project Manager Reassignment NL-23-0878, Request for Exemption from Security Event Notification Implementation2023-11-29029 November 2023 Request for Exemption from Security Event Notification Implementation ML23289A1632023-11-28028 November 2023 Letter and Amendment 195 and 192 LAR-23-006R1 TS 3.1.9 More Restrictive Action NL-23-0827, Response to Requests for Additional Information for a License Amendment Request and a Proposed Alternative Related to TS 3.4.142023-11-17017 November 2023 Response to Requests for Additional Information for a License Amendment Request and a Proposed Alternative Related to TS 3.4.14 ML23318A4582023-11-14014 November 2023 Integrated Inspection Report 05200025/2023003 ML23312A3502023-11-14014 November 2023 Integrated Inspection Report 05200026/2023003 ML23306A3552023-11-0808 November 2023 NRC Initial Test Program and Operational Programs Integrated Inspection Report 052000/262023008 ML23268A0572023-11-0707 November 2023 Issuance of Amendments 194 & 191 Request for License Amendment Relocation of Technical Specification 3.7.9, Spent Fuel Pool Makeup Water Sources (LAR-23-003) IR 05000424/20234022023-11-0606 November 2023 Security Baseline Inspection Report 05000424/2023402 and 05000425/2023402 IR 05000424/20230032023-10-27027 October 2023 Integrated Inspection Report 05000424/2023003 and 05000425/2023003 ML23291A1512023-10-18018 October 2023 Information Request for the Cyber Security Baseline Inspection, Notification to Perform Inspection 0520026/2024401 ML23263A9852023-10-12012 October 2023 Issuance of Amendments Nos. 221 and 204, Regarding Technical Specification 5.5.11.C, Acceptance Criteria for Charcoal Filter Testing ML23283A0472023-10-0808 October 2023 Neop Letter Dated October 8, 2023 - Vogtle 3 & 4 - TS 3.7.6 License Amendment Request NL-23-0750, Response to Second Request for Additional Information Regarding License Amendment Request: Technical Specification Revision to Adopt TSTF-339-A, Relocate Technical Specification Parameters to the Colr2023-10-0404 October 2023 Response to Second Request for Additional Information Regarding License Amendment Request: Technical Specification Revision to Adopt TSTF-339-A, Relocate Technical Specification Parameters to the Colr NL-23-0745, Refueling Outage 1R24 Steam Generator Tube Inspection Report2023-09-22022 September 2023 Refueling Outage 1R24 Steam Generator Tube Inspection Report ML23254A2032023-09-13013 September 2023 Initial Test Program and Operational Programs Inspection Report 05200025/2023013 ML23241B0212023-09-12012 September 2023 Review of Quality Assurance Topical Report ML23234A2352023-09-0808 September 2023 Request for Withholding Information from Public Disclosure Notification of Full Compliance of Required Action for NRC Order EA-12-049 Mitigation Strategies for Beyond-Design-Basis External Events IR 05000424/20230912023-09-0505 September 2023 Plan Units 1 and 2 - NRC Investigation Report 2-2022-006 and Notice of Violation - NRC Inspection Report 05000424/2023091 and 05000425/2023091 ML23234A3002023-09-0101 September 2023 NRC Integrated Inspection Report 05200026/2023003 ML23243A0092023-08-31031 August 2023 Updated Inspection Plan for Vogtle Electric Generating Plant, Units 3 & 4 (Report 05200025 2023005 & 05200026 2023005) NL-23-0695, Response to Round 2 Request for Additional Information Regarding License Amendment Request for Technical Specification 3.8.3, Inverters Operating, Completion Time Extension (LAR-22-002S2)2023-08-31031 August 2023 Response to Round 2 Request for Additional Information Regarding License Amendment Request for Technical Specification 3.8.3, Inverters Operating, Completion Time Extension (LAR-22-002S2) ML23243B0252023-08-30030 August 2023 Exam Corporate Notification Letter (210 Day) IR 05000424/20230052023-08-29029 August 2023 Updated Inspection Plan for Vogtle Electric Generating Plant, Units 1 & 2 - Report 05000424/2023005 and 05000425/2023005 NL-23-0666, License Amendment Request: Remove Combined License Appendix C (LAR 23-008)2023-08-28028 August 2023 License Amendment Request: Remove Combined License Appendix C (LAR 23-008) 2024-02-05
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARIR 05000424/20244032024-01-26026 January 2024 Information Request for the Cyber-Security Baseline Inspection, Notification to Perform Inspection 05000424/2024403; 05000425/2024403 ML23341A2042024-01-12012 January 2024 Request for Additional Information Exemption Requests for Physical Barriers (EPID L-2023-LLE-0018 & L-2023-LLE-0021) ML23342A0802023-12-0808 December 2023 NRR E-mail Capture - Request for Additional Information (RAI) - Vogtle, Unit 1 - Review of SG Tube Inspection Report for Refueling Outage 24 (L-2023-LRO-0067) ML23279A2082023-10-0505 October 2023 Issuance of Formal RAIs - Vogtle, Units 1 and 2 - Proposed LAR and Proposed Alternative Request to Revise TS 3.4.14.1 and IST ALT-VR-02 (EPIDs L-2023-LLA-0061 and L-2023-LLR-0023) ML23257A2092023-09-14014 September 2023 NRR E-mail Capture - Formal Issuance of 2nd Round RAIs for Surry Units 1&2 and North Anna Units 1&2 Emergency Plans LAR ML23248A3482023-09-0505 September 2023 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) 6 - Vogtle - TSTF-339 LAR (L-2023-LLA-0053) ML23243A9862023-08-31031 August 2023 NRR E-mail Capture - Draft RAIs for EP Staff Augmentation Times LAR (L-2022-LLA-0166) ML23188A1512023-08-0909 August 2023 Round 2 RAIs for LAR 22-002 TS 3.8.3 Inverters-Operating, Completion Time Extension ML23200A0112023-07-18018 July 2023 Document Request for Vogtle Unit 3 RP Inspection ML23198A1552023-07-17017 July 2023 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) - Hatch, Farley, and Vogtle, Units 1 and 2 Quality Assurance Topical Report (QATR) Submittal Dated June 15, 2023 ML23193A7832023-07-12012 July 2023 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) - Vogtle - TSTF-339 LAR (L-2023-LLA-0053) ML23065A0612023-03-0303 March 2023 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) 14 - Vogtle - AST, TSTF-51, TSTF-471, and TSTF-490 LAR (L-2022-LLA-0096) ML23006A0882023-01-0606 January 2023 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) - Vogtle - Accident Source Term (Ast), TSTF-51, TSTF-471, and TSTF-490 LAR (L-2022-LLA-0096) ML22348A0332022-12-13013 December 2022 NRR E-mail Capture - for Your Action - RAI - Vogtle, Unit 2 - Steam Generator Tube Inspection Report (L-2022-LRO-0120) ML22192A1042022-08-0101 August 2022 Acceptance of Requested Licensing Action Amendment Request Application to Allow Use of Lead Test Assemblies for Accident Tolerant Fuel with Request for Additional Information ML22157A0902022-06-0606 June 2022 NRR E-mail Capture - RAIs - Vogtle, Unit 1 - Refueling Outage (RFO) 1R23 Steam Generator (SG) Tube Inspection Report ML22104A1312022-04-14014 April 2022 NRR E-mail Capture - Request for Additional Information - Farley and Vogtle - Relocate Piping Inspection License Amendment Request (L-2021-LLA-0235) ML22026A3942022-01-26026 January 2022 NRR E-mail Capture - Request for Additional Information - Vogtle, Units 1 and 2, TS 3.7.2 LAR ML21350A1032021-12-16016 December 2021 NRR E-mail Capture - Request for Additional Information - Vogtle, Units 1 and 2, TS 3.7.2 LAR ML21321A3762021-11-15015 November 2021 NRR E-mail Capture - Request for Additional Information - Vogtle, Units 1 and 2, TS 3.7.2 LAR ML21075A0032021-03-12012 March 2021 Emergency Preparedness Exercise Inspection Request for Information for - Brunswick, Catawba, North Anna, Oconee, Vogtle 1 & 2 ML21033B1072021-02-0202 February 2021 NRR E-mail Capture - RAI - Vogtle Unit 1 - SG Report (L-2020-LRO-0059) ML20338A1512020-12-0303 December 2020 NRR E-mail Capture - RAIs for Vogtle GSI-191 LAR (L-2020-LLA-0182) ML20325A0432020-11-20020 November 2020 NRR E-mail Capture - for Your Review - Draft RAIs for Vogtle GSI-191 LAR (L-2020-LLA-0182) ML20297A3052020-10-22022 October 2020 NRR E-mail Capture - RAIs for Vogtle Relief Request - EPRI Report (L-2020-LLR-0109) ML20293A0752020-10-14014 October 2020 NRR E-mail Capture - RAIs for SNC Fleet EP LAR (L-2020-LLA-0150 and L-2020-LLA-0151) ML20149K6252020-05-27027 May 2020 NRR E-mail Capture - RAIs for SNC Fleet Fire Protection Exemption Requests ML19263A6432019-09-19019 September 2019 NRR E-mail Capture - RAI - Vogtle End State License Amendment Request (LAR) to Revise the Technical Specifications (Tss) for Vogtle, Units 1 and 2 (L-2019-LLA-0148) ML19156A1872019-06-0505 June 2019 NRR E-mail Capture - Request for Additional Information (RAI) for Vogtle Unit 2 Core Operating Limits Report, Cycle 21 ML19105B1632019-04-15015 April 2019 NRR E-mail Capture - Request for Additional Information (RAI) for Voglte TSTF-412 Adoption LAR (L-2018-LLA-0731) ML18355A4772019-01-0404 January 2019 Request for Additional Information Revise TS 5.2.2.g and Update Emergency Plan Minimum On-Shift Staff Tables ML18337A4032018-12-0606 December 2018 Request for Additional Information Revise Technical Specification 5.2.2.G and Updating Emergency Plan Minimum On-Shift Staff Tables ML18236A4452018-08-30030 August 2018 Review of Response to RAI License Amendment Request for Approval to Utilize the Tornado Missile Risk Evaluator to Analyze Tornado Missile Protection Non-Conformances ML18227A0222018-08-15015 August 2018 Notification of Inspection and Request for Information ML18225A3362018-08-13013 August 2018 NRR E-mail Capture - Request for Additional Information Regarding Relief Request VEGP-ISI-RR-03 ML18197A0602018-07-13013 July 2018 Us NRC Final RAI No. 1 for Vogtle 3 and 4 LAR-18-015, Fire Protection System Non-Safety Cable Spray Removal ML18197A1882018-07-13013 July 2018 Us NRC Final Request for Additional Information (Final RAI) No. 4 on Vogtle LAR-17-024, Technical Specification Updates for Reactivity Controls and Other Miscellaneous Changes ML18197A1052018-07-13013 July 2018 Us NRC Final Request for Additional Information (Final RAI) No. 1 on Vogtle 3 and 4 LAR-17-043, Containment Pressure Analysis ML18192C0782018-07-11011 July 2018 RAI (LAR 18-009) - Vogtle Electric Generating Plant, Unit 3 and 4 ML18192B7692018-07-11011 July 2018 Us NRC Draft Request for Additional Information (Draft RAI) No. 4 on Vogtle LAR-17-024, Technical Specification Updates for Reactivity Controls and Other Miscellaneous Changes ML18136A4972018-06-0101 June 2018 Request for Additional Information, License Amendment Request to Incorporate Tornado Missile Risk Evaluator Methodology Into Licensing Basis ML18109A1152018-05-0101 May 2018 Request for Additional Information ML18079A9572018-03-28028 March 2018 Request for Additional Information Incorporate Seismic Probabilistic Risk Assessment Into the 10 CFR 50.69 Categorization Process (CAC Nos. MF9861 and MF9862; EPID L-2017-LLA-0248) ML18058A0812018-02-27027 February 2018 Enclosurequest for Additional Information(Rai for Review of Southern Nuclear Operating Company'S Decommissioning Funding Plan Updates for Joseph M. Farley,Unit 1 and 2;Edwin I. Hatch,Units 1 and 2; and Vogtle Electric Generating Plant, Unit ML18030B0622018-02-0808 February 2018 Request for Additional Information Reverse Technical Specification 5.5.17 for Permanent Extension of Type a and Type C Leak Rate Test Frequencies (CAC Nos. MG0240, MG0241; EPID L-2017-LLA-0295) ML17355A1012018-01-11011 January 2018 Request for Additional Information (CAC Nos. MF9685 and MF9686; EPID L-2017-TOP-0038) ML17354A7822018-01-0505 January 2018 Request for Additional Information Incorporate Seismic Probabilistic Risk Assessment Into the 10 CFR 50.69 Categorization Process (CAC Nos. MF9861 and MF9862; EPID L-2017-LLA-0248) ML17318A0352017-11-22022 November 2017 Request for Additional Information 2024-01-26
[Table view] |
Text
Mr. C. R. Pierce Regulatory Affairs Director UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 1 O, 2015 Southern Nuclear Operating Company, Inc. Post Office Box 1295, Bin -038 Birmingham, AL 35201-1295
SUBJECT:
VOGTLE ELECTRIC GENERATING PLANT, UNIT 1 (VEGP) -REQUEST FOR ADDITIONAL INFORMATION ON SPRING 2014 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MF4987)
Dear Mr. Pierce:
By letter dated October 3, 2014 (Agencywide Documents Access and Management System Accession No. ML 14276A430), Southern Nuclear Operating Company (the licensee, SNC) submitted information summarizing the results of the spring 2014 steam generator inspedions performed at Vogtle Electric Generating Plant, Unit 1. These inspections were performed during refueling outage 18. We have determined that additional information is needed, as noted below, in order to complete the review. 1. SNC's letter stated that some of the indications identified during this outage have been present for several cycles. Please clarify whether the indications found on the tubes at row 24, column 66 (R24C66), R40C57, and R49C89 were present in prior inspections since they do not seem to have been reported in previous inspection reports. 2. Previously, an indication was reported in R32C35 in SG 2. During RFO 18, this indication was not reported.
Please discuss. 3. Please confirm that 199 indications of anti-vibration bar (AVB) wear were detected in 110 tubes in SG 4. Please confirm that 128 indications of AVB wear were detected in 75 tubes in SG 1. 4. SNC's letter stated that some indications in SG 2 were inspected during RFO 18. Were only the indications actually listed in Table 5 inspected?
Were those inspections performed using only a rotating probe? If more inspections were performed, please discuss the scope and results of those inspections (include all information required by the technical specifications for these inspections).
- 5. In Table 5 of SNC's letter, there are several indications in SG 2 at the baffle plates. Please discuss the cause <?f these indications (e.g., pressure pulse cleaning).
- 6. Please confirm that all tube plugs were present and in the proper locations.
- 7. Please discuss the results of the channel head in.spections.
C.R. Pierce 8. At the bottom of page E-2 of SNC's report, two wear indications are discussed.
Please discuss the cause of these indications.
If the suspected cause is a loose part or foreign object, were any visual inspections performed to ensure the part was no longer present? If not, how was the integrity of this tube assessed for future operation (since eddy current examinations may not detect a part that has moved away from the tube or
Docket No. 50-424 cc: Distribution via Listserv Sincerely, Y'Robert Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
\
C.R. Pierce 8. At the bottom of page E-2 of SNC's report, two new wear indications are discussed.
Please discuss the cause of these indications.
If the suspected cause is a loose part or foreign object, were any visual inspections performed to ensure the part was no longer present? If not, how was the integrity of this tube assessed for future operation (since .eddy current examinations may not detect a part that has moved away from the tube or that is nonconducting)?
Docket No. 50-424 cc: Distribution via Listserv DISTRIBUTION:
PUBLIC LPL2-1 R/F RidsAcrsAcnw_MailCTR Resource RidsNrrLASFigueroa Resource RidsNrrPMVogtle Resource ADAM s Accession No.: ML 15062A447 OFFICE DORL/LPL2-1
/PM DORL/LPL2-1
/LA NAME RMartin SFigueroa DATE . 03/10/15 03/09/15 Sincerely, /RA/ Robert Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation RidsNrrDorlDpr Resource RidsNrrDorllpl2-1 Resource RidsRgn2MailCenter Resource AJohnson, NRR DE/ESGB/BC DORL/LPL2-1
/BC GKulesa RPascarelli 02/23/15*
03/10/15
- Bv memo dated. DORL/LPL2-1/PM RMartin 03/10/15 OFFICIAL RECORD COPY