Letter Sequence RAI |
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TAC:MF5346, Control Room Habitability (Approved, Closed) TAC:MF5347, Control Room Habitability (Approved, Closed) |
Results
Other: ML15104A782, ML15196A045, ML15196A115, ML16202A033, RS-15-193, Responds to NRC Requests for Additional Information, Set 5, Dated July 7, 2015 Related to the License Renewal Application, RS-15-194, Responds to NRC Requests for Additional Information, Set 6, Dated July 7, 2015 Related to the License Renewal Application, RS-15-305, Corrections to the License Renewal Application Dated December 9, 2014, RS-15-306, Submittal of 10 CFR 54.21(b) Annual Amendment to the License Renewal Application, RS-16-033, Update to Commitment 47 Related to the License Renewal Application, RS-16-068, Comments on the Safety Evaluation Report with Open Items, Related to the License Renewal Application, RS-16-128, Second 10 CFR 54.21(b) Annual Amendment to the License Renewal Application
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MONTHYEARML15104A7822015-05-0808 May 2015 Scoping and Screening Methodology Audit Report Regarding LaSalle County Station, Units 1 and 2 Project stage: Other ML15111A1372015-05-14014 May 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application - Set 1 (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15125A1982015-05-29029 May 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application - Set 2 (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15131A4132015-06-0808 June 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application - Set 3 (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15140A1922015-06-0808 June 2015 Summary of Telephone Conference Call Held on May 13, 2015, Between the U.S. Nuclear Regulatory Commission and Exelon Generation Co., LLC, Concerning Requests for Additional Information, Set 2 Pertaining to the Lasalle County Station License Project stage: RAI ML15146A2622015-06-19019 June 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application-Set 4 (TAC Nos. MF5347 and MF5346) Project stage: RAI RS-15-165, Response to NRC Requests for Additional Information, Set 2, Dated May 29, 2015 Related to the License Renewal Application2015-06-25025 June 2015 Response to NRC Requests for Additional Information, Set 2, Dated May 29, 2015 Related to the License Renewal Application Project stage: Response to RAI RS-15-171, Response to NRC Requests for Additional Information, Set 3, Dated June 8, 2015, Related to the License Renewal Application2015-07-0101 July 2015 Response to NRC Requests for Additional Information, Set 3, Dated June 8, 2015, Related to the License Renewal Application Project stage: Response to RAI ML15159A9002015-07-0606 July 2015 Telephone Conference Call Held on May 20, 2015, Between the U.S. Nuclear Regulatory Commission and Exelon Generation Co., LLC, Requests for Additional Information, Set 3 Pertaining to the LaSalle County Station License Renewal Application ( Project stage: RAI ML15163A0712015-07-0707 July 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application - Set 6 (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15159A2082015-07-0707 July 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application - Set 5 (TAC Nos. MF5347 and MF5346) Project stage: RAI RS-15-180, Response to NRC Requests for Additional Information, Set 4, Dated June 19, 2015 Related to the License Renewal Application2015-07-15015 July 2015 Response to NRC Requests for Additional Information, Set 4, Dated June 19, 2015 Related to the License Renewal Application Project stage: Response to RAI RS-15-198, Request for Schedule Change Related to Advisory Committee on Reactor Safeguards (ACRS) Subcommittee Review of License Renewal Application (TAC Nos. MF5347 and MF5346)2015-07-16016 July 2015 Request for Schedule Change Related to Advisory Committee on Reactor Safeguards (ACRS) Subcommittee Review of License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: Request ML15196A5292015-07-27027 July 2015 Requests for Additional Information for the Review of the Lasalle County Station, Units 1 and 2 License Renewal Application - Set 7 (Tac Nos. MF5347 and MF5346) Project stage: RAI RS-15-194, Responds to NRC Requests for Additional Information, Set 6, Dated July 7, 2015 Related to the License Renewal Application2015-08-0606 August 2015 Responds to NRC Requests for Additional Information, Set 6, Dated July 7, 2015 Related to the License Renewal Application Project stage: Other RS-15-193, Responds to NRC Requests for Additional Information, Set 5, Dated July 7, 2015 Related to the License Renewal Application2015-08-0606 August 2015 Responds to NRC Requests for Additional Information, Set 5, Dated July 7, 2015 Related to the License Renewal Application Project stage: Other ML15204A6302015-08-18018 August 2015 Requests for Additional Information for the Review of the LaSalle County Station Units 1 & 2 License Renewal Application - Set 9 (TAC Nos. MF5347 and MF5346) Project stage: RAI RS-15-223, Response to NRC Requests for Additional Information, Set 7, Dated July 27, 2015; and a Correction to Information Associated with the Set 2 Response to RAI 8.2.1.20-2, Related to the Renewal Application2015-08-26026 August 2015 Response to NRC Requests for Additional Information, Set 7, Dated July 27, 2015; and a Correction to Information Associated with the Set 2 Response to RAI 8.2.1.20-2, Related to the Renewal Application Project stage: Response to RAI ML15229A0192015-08-27027 August 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application - Set 10 (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15217A5412015-08-28028 August 2015 June 9, 2015, Summary of Telecon Held Between the NRC and Exelon Generation Co., LLC, Concerning Request for Additional Information Set 5 Pertaining to the LaSalle County Station License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15217A5642015-08-28028 August 2015 June 3, 2015, Summary of Telecon Held Between the NRC and Exelon Generation Co., LLC, Concerning Request for Additional Information Set 4 Pertaining to the LaSalle County Station License Renewal Application (Tac Nos. MF5347 and MF5346) Project stage: RAI ML15217A5752015-08-28028 August 2015 June 10, 2015, Summary of Telecon Held Between the NRC and Exelon Generation Co., LLC, Concerning Request for Additional Information Set 4 Pertaining to the LaSalle County Station License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15219A2772015-08-28028 August 2015 June 23, 2015, Summary of Telecon Held Between the NRC and Exelon Generation Co., LLC, Concerning Request for Additional Information Set 6 Pertaining to the LaSalle County Station License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15222A0062015-08-28028 August 2015 August 5, 2015, Summary of Telecon Held Between the NRC and Exelon Generation Co., LLC, Concerning Request for Additional Information Set 9 Pertaining to the LaSalle County Station License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15195A3382015-08-28028 August 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application-Set 8 (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15222A0082015-08-28028 August 2015 July 22, 2015, Summary of Telecon Held Between the NRC and Exelon Generation Co., LLC, Concerning Request for Additional Information Set 8 Pertaining to the LaSalle County Station License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15222A0152015-08-28028 August 2015 July 8, 2015, Summary of Telecon Held Between the NRC and Exelon Generation Co., LLC, Concerning Request for Additional Information Set 7 Pertaining to the LaSalle County Station License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15224A9352015-08-28028 August 2015 August 11, 2015, Summary of Telecon Held Between the NRC and Exelon Generation Co., LLC, Concerning Request for Additional Information Set 9 Pertaining to the LaSalle County Station License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15244B3532015-09-14014 September 2015 RAI for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application - Set 11 (TAC Nos. MF5347 and MF5346) Project stage: RAI RS-15-232, Response to NRC Requests for Additional Information, Set 9, Dated August 18, 2015 Related to the License Renewal Application2015-09-15015 September 2015 Response to NRC Requests for Additional Information, Set 9, Dated August 18, 2015 Related to the License Renewal Application Project stage: Response to RAI RS-15-238, Response to NRC Requests for Additional Information, Set 10, Dated August 27, 2015 Related to License Renewal Application2015-09-17017 September 2015 Response to NRC Requests for Additional Information, Set 10, Dated August 27, 2015 Related to License Renewal Application Project stage: Response to RAI ML15196A1152015-09-22022 September 2015 Aging Management Programs Audit Report Regarding Lasalle County Station, Units 1 and 2, Project stage: Other ML15196A0452015-09-22022 September 2015 Aging Management Programs Audit Report Regarding Lasalle County Station, Units 1 and 2, (TAC Nos. MF5347 and MF5346). Cover Letter Project stage: Other RS-15-239, Response to NRC Requests for Additional Information, Set 8, Dated August 28, 2015 Related to the License Renewal Application2015-09-28028 September 2015 Response to NRC Requests for Additional Information, Set 8, Dated August 28, 2015 Related to the License Renewal Application Project stage: Response to RAI RS-15-256, Response to NRC Request for Additional Information, Set 11, Dated September 14, 2015 Related to the License Renewal Application2015-10-0808 October 2015 Response to NRC Request for Additional Information, Set 11, Dated September 14, 2015 Related to the License Renewal Application Project stage: Response to RAI ML15208A0522015-10-22022 October 2015 Schedule Revision for the Review of the Lasalle County Station License Renewal Application (TAC Nos. MF5347 & MF5346) Project stage: Approval ML15271A0212015-10-23023 October 2015 Requests for Additional Information for the Review of the Lasalle County Station, Units 1 and 2 License Renewal Application-Set 12 (TAC Nos. MF5347 and MF5346) Project stage: RAI RS-15-281, Response to NRC Requests for Additional Information, Set 12, Dated October 23, 2015 Related to the License Renewal Application2015-10-29029 October 2015 Response to NRC Requests for Additional Information, Set 12, Dated October 23, 2015 Related to the License Renewal Application Project stage: Response to RAI ML15300A3662015-11-0303 November 2015 Requests for Additional Information for the Review of the LaSalle County Station, Units 1 and 2 License Renewal Application - Set 13 (TAC Nos. MF5347 and MF5346) Project stage: RAI RS-15-305, Corrections to the License Renewal Application Dated December 9, 20142015-12-0202 December 2015 Corrections to the License Renewal Application Dated December 9, 2014 Project stage: Other RS-15-306, Submittal of 10 CFR 54.21(b) Annual Amendment to the License Renewal Application2015-12-0202 December 2015 Submittal of 10 CFR 54.21(b) Annual Amendment to the License Renewal Application Project stage: Other RS-15-292, Response to NRC Requests for Additional Information, Set 13, Dated November 3, 2015 Related to the License Renewal Application2015-12-10010 December 2015 Response to NRC Requests for Additional Information, Set 13, Dated November 3, 2015 Related to the License Renewal Application Project stage: Response to RAI ML15272A4002015-12-11011 December 2015 Summary of Teleconference Held on September 24, 2015, Between the NRC and Exelon Generation Co., LLC, Concerning RAI Set 10 Response Pertaining to the LaSalle County Station License Renewal Application (TAC Nos. MF5347 and MF5346) Project stage: RAI ML15301A1892015-12-14014 December 2015 Request for Additional Information for the Review of the LaSalle County Station, Units 1 & 2 License Renewal Application - Set 14 (TAC Nos. MF5347 and MF5346) Project stage: RAI RS-16-003, Responses to NRC Requests for Additional Information, Set 14, Dated December 14, 2015, and Two Additional Commitment Implementation Schedule Clarifications, Related to the License Renewal Application2016-01-0707 January 2016 Responses to NRC Requests for Additional Information, Set 14, Dated December 14, 2015, and Two Additional Commitment Implementation Schedule Clarifications, Related to the License Renewal Application Project stage: Response to RAI ML15357A2812016-01-0707 January 2016 Summary of Teleconference Held on December 22, 2015, Between the NRC and Exelon Generation Co., LLC, Concerning the LaSalle County Station License Renewal Application (Tac Nos. MF5347 and MF5346) Project stage: Meeting RS-16-007, Supplemental Information Associated with Implementation of BWRVIP-25, Core Plate Inspection and Flaw Evaluation Guidelines, Related to the License Renewal Application2016-01-14014 January 2016 Supplemental Information Associated with Implementation of BWRVIP-25, Core Plate Inspection and Flaw Evaluation Guidelines, Related to the License Renewal Application Project stage: Supplement ML16021A3252016-01-29029 January 2016 Summary of Teleconference Held on January 21, 2016, Between the NRC and Exelon Generation Co., LLC, Concerning RAI 4.2.10-1 Response Project stage: RAI RS-16-033, Update to Commitment 47 Related to the License Renewal Application2016-02-0101 February 2016 Update to Commitment 47 Related to the License Renewal Application Project stage: Other ML15344A3542016-02-16016 February 2016 Requests for Additional Information for the Review of the Lasalle County, Units 1 and 2 License Renewal Application Set 15 (TAC Nos. MF5347 and MF5346) Project stage: RAI 2015-07-16
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Category:Letter
MONTHYEARIR 05000373/20230042024-01-24024 January 2024 County Station - Integrated Inspection Report 05000373/2023004 and 05000374/2023004 ML24024A1332024-01-24024 January 2024 Confirmation of Initial License Examination IR 05000373/20230122024-01-18018 January 2024 County Station - Biennial Problem Identification and Resolution Inspection Report 05000373/2023012 and 05000374/2023012 ML23354A2902024-01-0505 January 2024 Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0028 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting)) ML23360A6082023-12-27027 December 2023 County Station Request for Information for NRC Commercial Grade Dedication Inspection: Inspection Report 05000373/2024010 and 05000374/2024010 ML23278A1292023-12-14014 December 2023 Units 1 & 2; Limerick, Units 1 & 2; Nine Mile Point, Units 1 & 2; and Peach Bottom, Units 2 & 3 -Revision to Approved Alternatives to Use Boiling Water Reactor Vessel and Internals Project Guidelines ML23305A1402023-12-13013 December 2023 Units 1 & 2; Nine Mile Point, Unit 2; Peach Bottom, Units 2 & 3; and Quad Cities, Units 1 and 2 - Issuance of Amendments to Adopt Traveler TSTF-580 ML23317A1192023-11-10010 November 2023 Constellation Energy Generation, LLC - 2023 Annual Report - Guarantees of Payment of Deferred Premiums RS-23-120, Supplemental Information Letter for Part 73 Exemption Request - Responses to Request for Confirmatory Information2023-11-10010 November 2023 Supplemental Information Letter for Part 73 Exemption Request - Responses to Request for Confirmatory Information IR 05000373/20230032023-11-0909 November 2023 County Station Integrated Inspection Report 05000373/2023003, 05000374/2023003, and 07200070/2023001 ML23286A2602023-11-0808 November 2023 Issuance of Amendment Nos. 260 and 245 to Renewed Facility Operating Licenses Relocation of Pressure and Temperature Limit Curves to the Pressure Temperature Report IR 05000373/20234012023-11-0707 November 2023 County Station Security Baseline Inspection Report 05000373/2023401 and 05000374/2023401 RS-23-103, Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-10-13013 October 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation RS-23-097, Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans2023-10-12012 October 2023 Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans IR 05000374/20230102023-10-11011 October 2023 NRC Inspection Report 05000374/2023010 IR 05000373/20233012023-09-15015 September 2023 Errata to NRC Initial License Examination Report 05000373/2023301; 05000374/2023301 RS-23-080, Constellation Energy Generation, LLC, Application to Revise Technical Specifications to Adopt TSTF-264-A, Revision 0, 3.3.9 and 3.3.10 - Delete Flux Monitors Specific Overlap Requirement SRs2023-08-30030 August 2023 Constellation Energy Generation, LLC, Application to Revise Technical Specifications to Adopt TSTF-264-A, Revision 0, 3.3.9 and 3.3.10 - Delete Flux Monitors Specific Overlap Requirement SRs RS-23-087, Revision to Approved Alternatives Associated with the Use of the BWRVIP Guidelines in Lieu of Specific ASME Code Requirements on Reactor2023-08-0404 August 2023 Revision to Approved Alternatives Associated with the Use of the BWRVIP Guidelines in Lieu of Specific ASME Code Requirements on Reactor ML23212A9012023-08-0303 August 2023 Regulatory Audit Report to Support the Review of the Amendments to Relocation of the Pressure Temperature Limit Curves to the Pressure and Temperature Limits Report IR 05000373/20230022023-08-0101 August 2023 County Station - Integrated Inspection Report 05000373/2023002 and 05000374/2023002 ML23208A3182023-07-27027 July 2023 Notification of an NRC Biennial Licensed Operator Requalification Program Inspection and RFI RS-23-084, Response to Request for Additional Information Regarding the Application to Revise Design Basis to Allow Use of Plastic Section Properties in Lower Downcomer Braces Analysis2023-07-24024 July 2023 Response to Request for Additional Information Regarding the Application to Revise Design Basis to Allow Use of Plastic Section Properties in Lower Downcomer Braces Analysis ML23192A5272023-07-12012 July 2023 NRC Initial License Examination Report 05000373/2023301; 05000374/2023301 ML23186A2062023-07-0606 July 2023 Information Request for a NRC Post-Approval Site Inspection for License Renewal 05000374/2023010 ML23181A1502023-06-30030 June 2023 Combined Response to Request for Additional Information and Supplemental Information in Support of LAR to Relocate Pressure and Temperature Limit Curves to the Pressure and Temperature Limits Report ML23178A2422023-06-28028 June 2023 Reassignment of the U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch III IR 05000373/20230112023-06-26026 June 2023 County Station - Quadrennial Fire Protection Team Inspection Report 05000373/2023011 and 05000374/2023011 RS-23-077, Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations2023-06-16016 June 2023 Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations ML23167A0352023-06-16016 June 2023 Registration of Use of Cask to Store Spent Fuel ML23171A9562023-06-12012 June 2023 Post Exam Ltr RS-23-042, Application to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling2023-05-25025 May 2023 Application to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling IR 05000373/20230012023-05-10010 May 2023 County Station - Integrated Inspection Report 05000373/2023001 and 05000374/2023001 ML23123A2202023-05-0303 May 2023 Relief Request I4R-14 for Alternative Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection ML23118A3472023-05-0101 May 2023 County, 1 & 2; Nine Mile Point, 2; and Quad Cities, 1 & 2 - Correction of Amendment No. 193 Adoption of TSTF-306, Revision 2, Add Action to LCO 3.3.6.1 to Give Option to Isolate the Penetration EPID L-2022-LLA-0143 ML23121A1612023-05-0101 May 2023 Information Meeting (Open House) with a Question-and-Answer Session to Discuss NRC 2022 End-of-Cycle Plant Performance Assessment of LaSalle County Station, Units 1 and 2 ML23114A2522023-04-28028 April 2023 Request to Use a Provision of a Later Edition of the ASME Boiler & Pressure Vessel Code, Section XI ML23081A0382023-04-25025 April 2023 County, 1 & 2; Nine Mile Point, 2; and Quad Cities, 1 & 2 - Issuance of Amendments to Adopt TSTF-306, Rev. 2, Add Action to LCO 3.3.6.1 to Give Option to Isolate the Penetration ML23110A3202023-04-21021 April 2023 Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection ML23107A1822023-04-18018 April 2023 Operator Licensing Examination Approval Lasalle County Station, May 2023 RS-23-049, Constellation Energy Generation, LLC, Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations2023-03-23023 March 2023 Constellation Energy Generation, LLC, Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations ML23073A2182023-03-22022 March 2023 Issuance of Amendment No. 258 to Renewed Facility Operating Licenses Exigent Amendment to Revise Design Basis Related to Seismic Requirements RS-23-048, Exigent Amendment Request to Revise Design Basis Related to Seismic Requirements2023-03-0707 March 2023 Exigent Amendment Request to Revise Design Basis Related to Seismic Requirements ML23061A1632023-03-0303 March 2023 Reassignment of the U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch 3 IR 05000373/20220062023-03-0101 March 2023 Annual Assessment Letter for LaSalle County Station, Units 1 and 2 (Report 05000373/2022006 and 05000374/2022006) RS-23-045, Constellation Energy Generation, LLC Submittal of Fitness for Duty Performance Data Reports for 2022 Per 10 CFR 26.717(c) & 10 CFR 26.2032023-02-28028 February 2023 Constellation Energy Generation, LLC Submittal of Fitness for Duty Performance Data Reports for 2022 Per 10 CFR 26.717(c) & 10 CFR 26.203 RS-23-037, Annual 10 CFR 50.46 Report of Emergency Core Cooling System Evaluation Model Changes and Errors for LaSalle County Station2023-02-22022 February 2023 Annual 10 CFR 50.46 Report of Emergency Core Cooling System Evaluation Model Changes and Errors for LaSalle County Station ML23024A1372023-02-0303 February 2023 Request for Withholding Information from Public Disclosure for LaSalle County Station, Unit Nos. 1 and 2 ML23031A1972023-01-31031 January 2023 Notification of NRC Fire Protection Team Inspection Request for Information, Inspection Report Nos. 05000373/2023011 and 05000374/2023011 IR 05000373/20220042023-01-31031 January 2023 County Station - Integrated Inspection Report 05000373/2022004 and 05000374/2022004 RS-23-003, Constellation Energy Generation, LLC, Summary of Changes to Quality Assurance Topical Report, NO-AA-10, and Decommissioning Quality Assurance Program, NO-DC-102023-01-31031 January 2023 Constellation Energy Generation, LLC, Summary of Changes to Quality Assurance Topical Report, NO-AA-10, and Decommissioning Quality Assurance Program, NO-DC-10 2024-01-05
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML23360A6082023-12-27027 December 2023 County Station Request for Information for NRC Commercial Grade Dedication Inspection: Inspection Report 05000373/2024010 and 05000374/2024010 ML23264A7992023-09-21021 September 2023 NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC Fleet Request License Amendment Request to Adopt TSTF-580, Revision 1 ML23208A3182023-07-27027 July 2023 Notification of an NRC Biennial Licensed Operator Requalification Program Inspection and RFI ML23153A1562023-06-0202 June 2023 NRR E-mail Capture - RAI LaSalle pressure-temperature Limits Report (PTLR) Amendment Request ML23150A2482023-05-25025 May 2023 NRR E-mail Capture - RAI Re LaSalle Downcomer Analysis Amendment Request ML23110A3202023-04-21021 April 2023 Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection ML22361A0792022-12-27027 December 2022 Notification of NRC Baseline Inspection and Request for Information (05000374/2023001) ML22256A0112022-09-12012 September 2022 NRR E-mail Capture - Request for Additional Information LaSalle County Station, Units 1 and 2 and Quad Cities Nuclear Power Station, Units 1 and 2 License Amendments Related to Fuel Storage ML22138A4112022-05-18018 May 2022 NRR E-mail Capture - Lasalle 1 and 2 - (RAI) License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Changes to TS Sections 4.3.1 and 5.6.5 (EPID-L-2021-LLA-0124) ML22126A0392022-05-0606 May 2022 NRR E-mail Capture - Lasalle 1 and 2 Draft (RAI) License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Proposed Changes to TS Sections 4.3.1 and 5.6.5 ML22097A0832022-04-0707 April 2022 County Station Information Request for the Cyber-Security Baseline Inspection, Notification to Perform Inspection 05000373/2022403 and 05000374/2022403 ML22062B0232022-03-0303 March 2022 NRR E-mail Capture - EPID-L-2022-LLR-0028, LaSalle Unit 1, Request for Additional Information (Rai), LaSalle Unit 1, Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21292A1782021-10-19019 October 2021 Information Request for a NRC Post-Approval Site Inspection for License Renewal 05000373/2022010 ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21207A0072021-07-26026 July 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology(EPID-L-2021-LLA-0016) ML21190A0192021-07-0808 July 2021 NRR E-mail Capture - Exelon Fleet - Request for Additional Information Regarding Adoption of TSTF-582 and TSTF-583-T ML21187A2972021-07-0707 July 2021 Information Request for an NRC Triennial 10 CFR 50.59 (Evaluation of Changes, Tests, and Experiments) Baseline Inspection ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21117A0342021-05-0505 May 2021 Request for Additional Information Regarding Proposed Alternative to Use ASME Code Case N-893 ML21119A2282021-04-29029 April 2021 NRR E-mail Capture - Request for Additional Information (RAI) - LaSalle, EPID-L-2020-LLA-0018, License Amendment Request (LAR) TSTF-505 ML21077A1902021-03-18018 March 2021 NRR E-mail Capture - Lasalle Units 1 and 2 - Request for Additional Information (RAI) Request for License Amendment Regarding Ultimate Heat Sink, (EPID-L-2020-LLA-0165) ML21068A2762021-03-0909 March 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) Relief Request I4R-12 Relief from Code Surface Examinations for 2B33-F060B Valve Repair (EPID-L-2020-LLA-0016) ML21067A6752021-03-0808 March 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) UHS Amendment Request (EPID-L-2020-LLA-0165) ML21060B4352021-03-0101 March 2021 NRR E-mail Capture - Second Round - Request for Additional Information (Rais) EPID-L-2020-LLA-0018, LaSalle License Amendment Request to Adopt Risk Informed Completion Times TSTF-505, Revision 2 ML21062A0652021-03-0101 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21053A0252021-02-20020 February 2021 NRR E-mail Capture - Request for Additional Information (Rais) - LaSalle Request for Exemption from Pre-Access Drug and Alcohol Testing ML21049A2572021-02-18018 February 2021 Request for Additional Information Byron/Dresden Proposed Changes to Site Emergency Plans to Support Post-Shutdown and Permanently Defueled Conditions (EPID-2020-LLA-0240 & EPID-2020-LLA-0237) ML21048A0432021-02-16016 February 2021 County Station - Notification of NRC Design Bases Assurance Inspection (Programs) and Initial Request for Information - Inspection Report 05000373/2021011 and 05000374/2021011 ML20364A2452020-12-29029 December 2020 Notification of an NRC Triennial Heat Sink Performance Inspection and Request for Information; Inspection Report 05000373/2021002; 05000374/2021002 ML20346A1042020-12-11011 December 2020 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Request for Additional Information Regarding the License Amendment Request to Adopt 10 CFR 50.69 ML20330A1892020-11-25025 November 2020 Request for Information for an NRC Post-Approval Site Inspection for License Renewal; Inspection Report 05000374/2021010 ML20321A0852020-11-16016 November 2020 Notification of NRC Baseline Inspection and Request for Information (05000374/2021001) ML20247J4082020-09-29029 September 2020 Apla Request for Additional Information LAR 50.69 and TSTF-505 (Epids L-2020-LLA-0017) and ML20253A3422020-09-17017 September 2020 Correction to Request for Additional Information Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Reactors (EPID-2020-LLA-0017) ML20253A2272020-09-16016 September 2020 Correction to Request for Additional Information Application to Adopt Risk-Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b ML20240A2182020-09-0303 September 2020 Request for Additional Information Regarding Amendment Request for Amendments to Renewed Facility Operating Licenses to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Co ML20239A7262020-08-27027 August 2020 Supplemental Information Needed for Acceptance of Requested Licensing Action Regarding Request for a License Amendment to Technical Specification 3.7.3, Ultimate Heat Sink ML20239A7982020-08-25025 August 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet License Amendment Request to Adopt TSTF-568, Revision 2 ML19275H1362019-10-0202 October 2019 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Request to Use ASME Code Case N-879 ML19179A0612019-07-19019 July 2019 Three Mile Point 1 - Supplemental Information Needed to Proposed Alternative to Use ASME Code Case N-879 ML19120A2302019-04-29029 April 2019 Ltr. 04/29/19 LaSalle County Station, Units 1 and 2 - Request for Information for an NRC Triennial Baseline Design Bases Assurance Inspection (Team); Inspection Report 05000373/2019012; 05000374/2019012 (DRS-M.Jones) ML19087A2682019-03-28028 March 2019 NRR E-mail Capture - Request for Additional Information (RAI) - LaSalle 1 and 2, EPID-L-2018-LLA-0162, LAR Removal of Operating Mode Restrictions for Performing Surveillance Testing of the Div 3 Battery and HPCS DG ML19065A0902019-03-0505 March 2019 NRR E-mail Capture - LaSalle 1 and 2, EPID-L-2018-LLR-0162, LAR Removal of Operating Mode Restrictions for Performing Surveillance Testing of the Div 3 Battery and HPCS DG, Additional Draft Request for Additional Information (RAI) ML19058A2392019-02-27027 February 2019 Information Request to Support Upcoming Problem Identification and Resolution Inspection at LaSalle County Station, Units 1 and 2 ML19036A6562019-02-0505 February 2019 NRR E-mail Capture - LaSalle 1 and 2, EPID-L-2018-LLR-0123, Relief Request I3R-15, Third Inservice Inspection Interval, Request for Additional Information (RAI) ML19022A2552019-01-22022 January 2019 NRR E-mail Capture - LaSalle Units 1 and 2, EPID-L-2018-LLA-0035, Amendment Request to Adopt TSTF-334-A, Status of Revised Draft RAIs Sent to You on December 13, 2018 ML19050A0042019-01-22022 January 2019 NRR E-mail Capture - LaSalle 1 and 2, EPID-L-2018-LLR-0162, LAR Removal of Operating Mode Restrictions for Performing Surveillance Testing of the Div 3 Battery and HPCS DG, Draft Request for Additional Information (RAI) ML19022A0292018-12-13013 December 2018 NRR E-mail Capture - Draft Request for Additional Information for LaSalle License Amendment Request to Adopt TSTF-334-A, Revision 2 2023-09-21
[Table view] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 19, 2015 Mr. Michael P. Gallagher Vice President, License Renewal Projects Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348
SUBJECT:
REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE LASALLE COUNTY STATION, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION - SET 4 (TAC NOS. MF5347 AND MF5346)
Dear Mr. Gallagher:
By letter dated December 9, 2014, Exelon Generation Company, LLC (Exelon) submitted an application pursuant to Title 10 of the Code of Federal Regulations Part 54, to renew the operating licenses NPF-11 and NPF-18 for LaSalle County Station (LSCS), Units 1 and 2, respectively. The staff of the U.S. Nuclear Regulatory Commission (NRC or the staff) is reviewing the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review.
These requests for additional information were discussed with Mr. John Hufnagel, and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3019 or by e-mail at Jeffrey.Mitchell2@nrc.gov.
Sincerely,
/RA/
Jeffrey S. Mitchell, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-373 and 50-374
Enclosure:
As stated cc: Listserv
June 19, 2015 Mr. Michael P. Gallagher Vice President, License Renewal Projects Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348
SUBJECT:
REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE LASALLE COUNTY STATION, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION -
SET 4 (TAC NOS. MF5347 AND MF5346)
Dear Mr. Gallagher:
By letter dated December 9, 2014, Exelon Generation Company, LLC (Exelon) submitted an application pursuant to Title 10 of the Code of Federal Regulations Part 54, to renew the operating licenses NPF-11 and NPF-18 for LaSalle County Station (LSCS), Units 1 and 2, respectively. The staff of the U.S. Nuclear Regulatory Commission (NRC or the staff) is reviewing the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review.
These requests for additional information were discussed with Mr. John Hufnagel, and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3019 or by e-mail at Jeffrey.Mitchell2@nrc.gov.
Sincerely,
/RA/
Jeffrey S. Mitchell, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-373 and 50-374
Enclosure:
As stated cc: Listserv DISTRIBUTION:
See next page ADAMS Accession Number: ML15146A262 *Concurred via e-mail OFFICE LA:DLR* PM:RPB1:DLR* PM:RPB1:DLR BC:RPB1:DLR PM:RPB1:DLR NAME YEdmonds JMitchell RPlasse YDiaz-Sanabria JMitchell DATE 6/ 15 /15 6/ 16 /15 6/17/15 6/18/15 6/19/15 OFFICIAL RECORD COPY
SUBJECT:
REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE LASALLE COUNTY STATION, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION - SET 4 (TAC NOS. MF5347 AND MF5346)
DISTRIBUTION:
E-MAIL:
PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRerb Resource RidsNrrDlrRarb Resource RidsNrrDlrRasb Resource RidsNrrDlrRsrg Resource RidsNrrPMLaSalle Resource
J. Mitchell R. Plasse D. Drucker B. Wittick J. Wachutka, OGC D. McIntyre, OPA M. Kunowski, RIII V. Mitlyng, RIII P. Chandrathil, RIII H. Logaras, RIII C. Lipa, RIII S. Sheldon, RIII R. Ruiz, RIII J. Robbins, RIII
LASALLE COUNTY STATION, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION REQUESTS FOR ADDITIONAL INFORMATION - SET 4 (TAC NOS. MF5347 AND MF5346)
RAI B.2.1.29-1
Background:
Title 10 of the Code of Federal Regulations (10 CFR) Section 54.21(a)(3), requires the applicant to demonstrate that the effects of aging for structures and components will be adequately managed so that the intended function(s) will be maintained consistent with the current licensing basis (CLB) for the period of extended operation (PEO). As described in the Standard Review Plan for License Renewal (SRP-LR), an applicant may demonstrate compliance with 10 CFR 54.21(a)(3) by referencing the Generic Aging Lessons Learned (GALL) Report when evaluation of the matter in the GALL Report applies to the plant.
License renewal application (LRA) Section B.2.1.29 states that the ASME Section XI, Subsection IWE aging management program (AMP) with enhancements will be consistent with the ten elements of the GALL Report AMP XI.S1, "ASME Section XI, Subsection IWE, specified in NUREG-1801. The Detection of Aging Effects program element recommends that the program be augmented to require surface examination, in addition to visual examination, to detect cracking in stainless steel penetration sleeves, dissimilar metal welds, bellows; and steel components that are subject to cyclic loading but have no CLB fatigue analysis. This program element also states that, where feasible, Appendix J tests (GALL Report AMP Xl.S4) may be performed in lieu of surface examination. This AMP recommendation is also related to GALL Report line item II.B4.CP-38, associated with SRP-LR Table 3.5-1, item 10, which recommends further evaluation specifically of the adequacy of the detection of aging effects with regard to stress corrosion cracking of stainless steel and dissimilar metal welds of penetration sleeves and penetration bellows.
During the license renewal AMP audit, the staff noted that the Detection of Aging Effects program element in the LRA AMP basis document (LA-PBD-AMP-XI.S1, Revision 1, Section 3.4) states that the primary containment penetration sleeves are carbon steel and stainless steel IWE pressure boundary surfaces including containment sleeves and associated welds are subject to Appendix J tests which are performed in addition to visual IWE examinations.
Issue:
It is not clear to the staff that the Detection of Aging Effects program element is consistent with the GALL Report because the LRA AMP basis document does not state that supplemental surface examinations will be performed, in addition to visual examinations, to detect cracking in stainless steel penetration sleeves, or dissimilar metal welds. Further, if the option to perform Appendix J tests in lieu of surface examinations will be used for any of the mentioned components, the basis document does not mention the type of Appendix J test that would be performed for the specific components in order for the Nuclear Regulatory Commission (NRC) staff to evaluate the appropriateness of the test to detect cracking in these components.
ENCLOSURE
Request:
- 1. State whether the supplemental surface examinations recommended in GALL Report AMP XI.S1 will be performed to detect cracking in stainless steel and dissimilar metal welds of penetration sleeves. If supplemental surface examination will be performed, indicate what standard will be used to perform surface examination of these stainless steel and dissimilar metal welds.
- 2. If an Appendix J test is used in lieu of supplemental surface examinations, indicate the type of Appendix J test that will be used for the applicable components and justify its appropriateness to detect cracking prior to loss of intended function.
- 3. If supplemental examinations will not be performed, or supplemental examination methods other than those described in GALL Report AMP XI.S1 will be used, describe and justify the exception to GALL Report AMP XI.S1.
RAI B.2.1.29-2
Background:
Section 54.21(a)(3) of 10 CFR requires applicants to demonstrate that the effects of aging for structures and components will be adequately managed so that the intended function(s) will be maintained consistent with the CLB for the PEO. As described in the SRP-LR, an applicant may demonstrate compliance with 10 CFR 54.21(a)(3) by referencing the GALL Report when evaluation of the matter in the GALL Report applies to the plant. LRA Section B.2.1.29 states that the ASME Section XI, Subsection IWE AMP with enhancements will be consistent with the ten elements of GALL Report AMP XI.S1, ASME Section XI, Subsection IWE, specified in NUREG-1801.
The Operating Experience section of LRA AMP B.2.1.29, ASME Section XI, Subsection IWE, discusses leakage from the reactor cavity pool drain line welds at the interface with the cavity pool liner which has been observed as seepage through the surrounding concrete. The LRA AMP provides an enhancement to the Monitoring and Trending program element to perform periodic ultrasonic thickness (UT) measurements of the containment liner in the vicinity of the leakage while the leakage persists. As stated in the SRP-LR, the staff reviewed the applicants programs for consistency with those described in the GALL Report and with plant-specific operating experience during the performance of an AMP audit.
Issue:
During the license renewal AMP audit, the NRC staff reviewed an action request (AR) report (LaSalle AR Report 02447966) from the Unit 2, 2015 refueling outage. The report identified indications of reactor cavity leakage in a different location from where it has been historically identified.
Request:
Explain, with sufficient technical detail, how the existing LRA AMP B.2.1.29 with the associated enhancement, is adequate to address the impact of the new operating experience on the
potential for loss of material due to corrosion of the containment liner, or propose a new/revised enhancement to address the operating experience. Explain whether the proposed UT location is adequate to address the newly identified leakage location, or if additional UT locations will be necessary.
RAI B.2.1.31-1
Background:
Section 54.21(a)(3) of 10 CFR requires applicants to demonstrate that the effects of aging will be adequately managed so that intended functions will be maintained consistent with the CLB during the PEO. As described in the SRP-LR, an applicant may demonstrate compliance with 10 CFR 54.21(a)(3) by referencing the GALL Report when evaluation of the matter in the GALL Report applies to the plant.
LRA Section B.2.1.31 states that the ASME Section XI, Subsection IWF program is an existing AMP with enhancements that will be consistent with the program elements in GALL Report AMP XI.S3, ASME Section XI, Subsection IWF. The Preventive Action program element of the LRA AMP provides an enhancement (Enhancement 1; LR Commitment No. 31, item 1) in order to become consistent with the corresponding GALL Report program element. This enhancement states in part that, prior to the PEO, the program will be enhanced to:
Provide guidance for proper specification of bolting material, storage, lubricant and sealants, and installation torque or tension to prevent or mitigate degradation and failure of structural bolting. Requirements for high strength bolts shall include the preventive actions for storage, lubricants and stress corrosion cracking potential discussed in Section 2 of RCSC (Research Council on Structural Connections) publication Specification for Structural Joints Using ASTM A325 or A490 Bolts.
The Preventive Action program element in the GALL Report AMP XI.S3 also includes a recommendation for using bolting material that has an actual measured yield strength less than 150 ksi or 1,034 MPa, intended as a preventive measure against the potential for stress corrosion cracking (SCC). During the audit, the staff noted that Section 3.2, Preventive Actions, in the LRA program basis document (LA-PBD-XI.S3, Revision 4) states that high strength bolting (actual measured yield strength greater than or equal to 150 ksi or 1,034 MPa) in sizes greater than 1 inch nominal diameter are not used in LaSalle County Station, Units 1 and 2 IWF supports. The staff also noted that, on the basis of the previous statement, the Detection of Aging Effects program element in Section 3.4 of the applicants program basis document does not include the supplemental volumetric examination recommended in the Detection of Aging Effects program element of the GALL Report AMP to detect cracking due to SCC. This supplemental volumetric examination recommendation is specifically for high strength bolting (actual measured yield strength greater than or equal to 150 ksi or 1,034 MPa) in sizes greater than 1 inch nominal diameter.
Issue:
It is not clear if Enhancement 1 (LR Commitment No. 31, item 1) is consistent with the Preventive Action program element of the GALL Report AMP XI.S3, with regard to the recommendation related to the use of bolting material that has an actual measured yield strength less than 150 ksi or 1,034 MPa. Specifically, since the enhancement does not prevent future use of high strength bolting material (actual measured yield strength greater than or equal to 150 ksi or 1,034 MPa) in sizes greater than 1 inch nominal diameter, that are susceptible to SCC, and the LRA AMP has no provisions for recommended supplemental volumetric examination of such bolting, this aspect of the Preventive Action program element of the LRA AMP appears to be not consistent with the GALL Report AMP.
Request:
- 1. Clarify how Enhancement 1 (LR Commitment No. 31, item 1) to the Preventive Action program element of the LRA AMP B.2.1.31, ASME Section XI, Subsection IWF, is consistent with the corresponding program element recommendation of the GALL Report AMP XI.S3, specifically with regard to the future use of high strength bolting (actual measured yield strength greater than or equal to 150 ksi or 1,034 MPa) in sizes greater than 1 inch nominal diameter for IWF supports, considering that such bolting is susceptible to SCC and the LRA AMP has no provisions for recommended supplemental volumetric examination to detect cracking if used in the future.
- 2. If criteria other than that described in the GALL Report are being used, provide the basis to justify the adequacy of the proposed exception to manage aging effects on high strength bolting (actual measured yield strength greater than or equal to 150 ksi) in sizes greater than 1 inch nominal diameter for IWF supports.
RAI B.2.1.33-1
Background:
Section 54.21(a)(3) of 10 CFR requires applicants to demonstrate that the effects of aging will be adequately managed so that intended functions will be maintained consistent with the CLB during the PEO. As described in the SRP-LR, an applicant may demonstrate compliance with 10 CFR 54.21(a)(3) by referencing the GALL Report when evaluation of the matter in the GALL Report applies to the plant.
LRA Section B.2.1.33 states that the Masonry Walls program is an existing AMP with enhancements that will be consistent with the program elements in the GALL Report AMP XI.S5, Masonry Walls. The LRA AMP includes an enhancement (Enhancement 1; LR Commitment No. 33, item 1) applicable to the Parameters Monitored or Inspected, and Acceptance Criteria program elements in order to become consistent with the corresponding GALL Report program elements. This enhancement states that, prior to the PEO, the program will be revised to provide guidance for inspection of masonry walls for separation and gaps between the supports for masonry walls. The Parameters Monitored or Inspected program element of the GALL Report AMP XI.S5 states that [t]he primary parameters monitored are potential shrinkage and/or separation and cracking of masonry walls and gaps between the
supports and masonry walls that could impact the intended function or potentially invalidate its evaluation basis.
Issue:
It is not clear that Enhancement 1 (LR Commitment No. 33, item 1), applicable to the Parameters Monitored or Inspected, and Acceptance Criteria program elements of LRA AMP B.2.1.33, is adequate to establish consistency with the GALL Report AMP with regard to monitoring for gaps between supports and masonry walls. In this regard, the critical parameters intended to be monitored, as provided in the GALL Report AMP, are gaps between the masonry walls and component supports (i.e., supports for safety-related systems or components that are located in close proximity to or have attachments to the walls, or edge supports that establish boundary conditions used in the design analysis of the walls) to ensure that intended function and/or evaluation basis of the masonry wall is not adversely impacted. This is different from the parameter described as gaps between the supports for masonry walls in the LRA AMP enhancement.
Request:
- 1. Clarify how the enhancement for the Parameters Monitored or Inspected, and Acceptance Criteria program elements of LRA AMP B.2.1.33 is consistent with the parameters and criteria described in the GALL Report AMP XI.S5 with regard to monitoring for gaps between supports and masonry walls.
- 2. If parameters or criteria other than that described in the GALL Report are being used, provide the basis to justify the adequacy of the proposed exception to manage the aging effects to masonry walls.
RAI B.2.1.34-1
Background:
Section 54.21(a)(3) of 10 CFR requires applicants to demonstrate that the effects of aging for structures and components will be adequately managed so that the intended function(s) will be maintained consistent with the CLB for the PEO. As described in SRP-LR, an applicant may demonstrate compliance with 10 CFR 54.21(a)(3) by referencing the GALL Report when evaluation of the matter in the GALL Report applies to the plant.
LRA Section B.2.1.34 states that the Structures Monitoring program, with enhancements, will be consistent with the ten program elements of GALL Report AMP XI.S6, Structures Monitoring.
The Detection of Aging Effects program element of GALL Report AMP XI.S6 recommends the following for inaccessible below-grade structural elements of plants with non-aggressive groundwater/soil environment:
a) evaluating the acceptability of inaccessible areas when conditions exist in accessible areas that could indicate the presence of, or result in, degradation to such inaccessible areas, and
b) examining representative samples of the exposed portions of the below grade concrete, when excavated for any reason.
During the license renewal AMP audit, the staff noted that the Detection of Aging Effects program element in the LRA AMP basis document (LA-PBD-AMP-XI.S6, Revision 3, Section 3.4e) states:
The existing Structures Monitoring and excavation procedures will be enhanced to require monitoring of buried concrete by (a) evaluation of the acceptability of inaccessible areas when conditions exist in accessible areas that could indicate the presence of, or result in, degradation to such inaccessible areas, and (b) examination of representative samples of the exposed portions of the below grade concrete, when excavated for any reason.
However, the enhancement in LRA Section B.2.1.34 (Enhancement 7; LR Commitment No. 34, item 7) only addresses item (b) of the GALL Report recommendations stated above.
Issue:
It is not clear to the staff that the LRA contains adequate enhancements for the Detection of Aging Effects program element to address consistency with both recommendations, (a) and (b),
from the GALL Report AMP XI.S6 as noted above.
Request:
- 1. Clarify how the enhancement for the Detection of Aging Effects program element is consistent with that described in the GALL Report AMP XI.S6 for managing aging effects in inaccessible areas exposed to non-aggressive ground water/soil environment.
- 2. If criteria other than that described in the GALL Report are being used, provide the basis to justify the adequacy of the proposed exception to manage the aging effects in inaccessible areas.
RAI B.2.1.34-2
Background:
Section 54.21(a)(3) of 10 CFR requires applicants to demonstrate that the effects of aging for structures and components will be adequately managed so that the intended function(s) will be maintained consistent with the CLB for the PEO. As described in SRP-LR, an applicant may demonstrate compliance with 10 CFR 54.21(a)(3) by referencing the GALL Report when evaluation of the matter in the GALL Report applies to the plant.
Enhancement 1 (LR Commitment No. 34, item 1) of the LRA Structures Monitoring AMP (LRA Section B.2.1.34) adds the plant-specific component type permanent drywell shielding to the scope of the Structures Monitoring program. The aging management review (AMR) results line item in LRA Table 3.5.2-7 (LRA page 3.5-160) associated with generic note J and plant-specific note 3, indicates that this component includes the material fiberglass, lists the aging effect
requiring management as change in material properties in an air-indoor uncontrolled environment, and credits the Structures Monitoring program for aging management. LRA Table 3.5.2-7, note 3, associated with this line item, notes that the fiberglass blanket covers [of the permanent drywell shielding] will be inspected by the Structures Monitoring program for rips and tears. Further, generic Note J states that neither the component nor the material and environment combination is evaluated in NUREG-1801.
The staff notes that the GALL Report AMP XI.S6 does not include fiberglass blanket covers of shielding components as part of the scope of the program and does not include rips and tears in the Parameters Monitored or Inspected program element, nor does it include associated acceptance criteria in the Acceptance Criteria program element.
Issue:
It is not clear to the staff how the LRA Structures Monitoring program will be adequate to manage aging effects without providing enhancement(s) to the applicable program elements to include relevant parameters to be monitored or inspected, detection of aging effects, and the associated acceptance criteria, as applicable, for the plant-specific component fiberglass blanket covers for permanent drywell shielding for which the AMP is credited. Further, there is an inconsistency in the aging effect being managed between the associated LRA Table 3.5.2-7 AMR results line item and the corresponding plant-specific note 3 (change in material properties versus rips and tears).
Request:
- 1. Explain how the enhancement to the Scope of Program program element that adds a plant-specific component type permanent drywell shielding is adequate to manage aging effects without providing corresponding enhancement(s) to the applicable program elements to include relevant parameters to be monitored or inspected, detection of aging effects, and the associated acceptance criteria, as applicable, for the plant-specific component. Otherwise, provide the necessary enhancement to the program elements of the Structures Monitoring program to adequately manage the applicable aging effects for the plant-specific component/material/environment/aging effect combination described above.
- 2. Describe the aging effect(s) and aging mechanism that will be managed by the AMP for the permanent drywell shielding fiberglass blanket covers and clarify the inconsistency between the aging effect described in LRA Table 3.5.2-7 AMR results line item (LRA page 3.5-160) and the corresponding plant-specific note 3 (change in material properties versus rips and tears).
RAI B.2.1.35-1
Background:
Section 54.21(a)(3) of 10 CFR requires applicants to demonstrate that the effects of aging for structures and components will be adequately managed so that the intended function(s) will be maintained consistent with the CLB for the PEO. As described in the SRP-LR, an applicant may
demonstrate compliance with 10 CFR 54.21(a)(3) by referencing the GALL Report when evaluation of the matter in the GALL Report applies to the plant.
LRA Section B.2.1.35 states that the RG 1.127, Inspection of Water-Control Structures Associated with Nuclear Power Plants program will be consistent with the aging management program specified in the GALL Report AMP XI.S7, RG 1.127, Inspection of Water-Control Structures Associated with Nuclear Power Plants. The Scope of Program program element of GALL Report AMP XI.S7 states that the water-control structures included in the NRC Regulatory Guide (RG) 1.127 program are concrete structures, structural steel and structural bolting, among other structures, associated with emergency cooling water systems or flood protection of nuclear power plants.
During the license renewal AMP audit, the staff noted that the Scope of Program program element in the LRA AMP basis document (LA-PBD-AMP XI.S7, Revision 3) included enhancement 1 (LR Commitment No. 35, item 1) which states that the existing program and procedures will be enhanced to include, among others, the shad net anchors to the scope of the existing RG 1.127 program. During the audit, the staff noted that the concrete structure (concrete piers), to which the anchors for the shad net are attached, is within the scope of license renewal; however, this concrete structure did not appear to be included as part of the LRA enhancement to the Scope of Program program element. During the license renewal AMP audit, the applicant clarified that the shad net anchors component referenced in the LRA includes both the steel elements of the anchors and the concrete pier structures.
Issue:
It is unclear to the staff whether the different materials/components associated with the shad net anchors are within the scope of the RG 1.127 program. The staff is concerned that the RG 1.127 program might not adequately manage the aging effects of in-scope components associated with water-control structures if the different materials/components from the shad net anchors structure are not clearly described in the LRA AMP Scope of Program program element. The staff notes that different materials/components (i.e. the steel anchors elements and the concrete piers) have different aging effects that require different parameters to be monitored or inspected for aging management to ensure that their intended function(s) is maintained for the PEO.
Request:
Clarify how the enhancement for the Scope of Program program element is consistent with that described in the GALL Report AMP XI.S7 for including the water-control structures associated with the RG 1.127 program (e.g. concrete pier and anchors from the shad net anchors) to ensure that the aging effects of in-scope components are being adequately managed. Include a description of all the different materials/components associated with the shad net anchors that are within the scope of the RG 1.127 program. Also, describe any differences in the parameters to be monitored or inspected between the different materials (e.g., steel, concrete) or components associated with the shad net anchors. Also, provide applicable conforming updates to the LRA and/or Updated Final Safety Analysis Report (UFSAR) supplement, as appropriate, based on the clarification.
RAI B.3.1.2-1
Background:
An evaluation of time limited aging analyses (TLAA), pursuant to 10 CFR 54.21(c)(1)(iii),
requires an applicant to demonstrate that the effects of aging on the intended function(s) will be adequately managed for the PEO. As described in Section 4.5.3.1.3 of the SRP-LR, an applicant may demonstrate adequate management of aging effects on concrete containment tendon prestress, under 10 CFR 54.21(c)(1)(iii), by referencing the GALL Report AMP X.S1, Concrete Containment Tendon Prestress, when evaluation of the matter in the GALL Report AMP applies to the plant.
The Acceptance Criteria program element of the GALL Report AMP X.S1 states, in part, [t]he goal is to keep the trend line above the PLL [predicted lower limit] because, as a result of any inspection performed in accordance with ASME Section XI, Subsection IWL, if the trend line crosses the PLL, the existing prestress in the containment tendon could go below the MRV
[minimum required value] soon after the inspection and would not meet the requirements.
This statement in the Acceptance Criteria program element of the GALL Report AMP is intended to address acceptance criteria for the case where the updated trend line crosses the PLL line.
The Concrete Containment Tendon Prestress AMP described in LRA Sections B.3.1.2 and A.3.1.2 includes an enhancement (Enhancement 1, LR Commitment No. 44) applicable to the Monitoring and Trending program element that will be implemented prior to the PEO to establish consistency with the GALL Report AMP X.S1. This enhancement states:
For each surveillance interval, trending lines will be updated [projected in LRA Section A.3.1.2] through the period of extended operation as part of the regression analysis and compared to the predicted lower limit and minimum required values for each tendon group. Program element Affected: Monitoring and Trending (Element 5).
During the audit, the staff noted that the program element description in Section 3.6, Acceptance Criteria, of the applicants program basis document (LA-PBD-AMP-X.S1, Revision 1) states, in part:
The trend line regression analysis for each tendon group is updated after each surveillance inspection to reflect newly acquired data from each tendon within its respective group, consistent with NRC Information Notice 99-10. If the trend line for any tendon group falls below the respective PLL line, then the cause should be determined, evaluated, and corrected.
The staff also noted that the second statement cited above was also included in Section 3.7, Corrective Actions, of the program basis document. These statements appear to indicate that Enhancement 1 (LR Commitment No. 44) is applied and implemented in the Acceptance Criteria program element of the LRA AMP to address the case where the trend line goes below the PLL, when the comparison of the two lines is made as committed to by the enhancement.
However, Section 3.6 of the program basis document indicated that the LRA AMP program element was consistent with that of the GALL Report AMP without any enhancement.
Issue:
The Acceptance Criteria program element of GALL Report AMP includes a provision intended to address the case where the trend line goes below the PLL when the comparison of the two lines is made. It is not clear if the program enhancement (LR Commitment No. 44), that commits to comparison of the trend line and the PLL, will also be applicable to and implemented in the Acceptance Criteria program element of the LRA AMP because:
- the LRA AMP and the program basis document state that Enhancement 1 to the LRA AMP is applicable only to the Monitoring and Trending program element, and
- statements exist in the description of the Acceptance Criteria program element of the LRA program basis document that appear to address the case when the trend line goes below the PLL; however the program element description also states that there is no enhancement to the program element.
The staff needs additional information to determine if the Acceptance Criteria program element of the LRA AMP is consistent with the GALL Report AMP.
Request:
Clarify, with the basis, whether the enhancement (Enhancement 1, LR Commitment No. 44) in LRA Section B.3.1.2, intended to establish consistency with the GALL Report AMP X.S1 and described in the LRA AMP as applicable only to the Monitoring and Trending program element, will also be applicable to and implemented in the Acceptance Criteria program element in order to become consistent with the Acceptance Criteria program element of the GALL Report AMP.
Also, provide applicable conforming updates to the LRA and/or UFSAR supplement, as appropriate, based on the response.