Letter Sequence RAI |
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EPID:L-2021-LLA-0178, License Amendment Request: Revise Technical Specification 3.7.2 Limiting Condition for Operation to Remove One Main Steam Isolation Valve System (Approved, Closed) |
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MONTHYEARNL-21-0845, License Amendment Request: Revise Technical Specification 3.7.2 Limiting Condition for Operation to Remove One Main Steam Isolation Valve System2021-09-30030 September 2021 License Amendment Request: Revise Technical Specification 3.7.2 Limiting Condition for Operation to Remove One Main Steam Isolation Valve System Project stage: Request ML21300A3892021-10-27027 October 2021 NRR E-mail Capture - Fyi - Acceptance Review - Vogtle Remove Technical Specification (TS) 3.7.2, Main Steam Isolation Valves (Msivs) LAR (L-2021-LLA-0178) Project stage: Acceptance Review ML21321A3762021-11-15015 November 2021 NRR E-mail Capture - Request for Additional Information - Vogtle, Units 1 and 2, TS 3.7.2 LAR Project stage: RAI ML21350A1032021-12-16016 December 2021 NRR E-mail Capture - Request for Additional Information - Vogtle, Units 1 and 2, TS 3.7.2 LAR Project stage: RAI NL-21-1015, Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3.7.2 Limiting Condition for Operation to Remove One Main Steam Isolation Valve System2022-01-13013 January 2022 Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3.7.2 Limiting Condition for Operation to Remove One Main Steam Isolation Valve System Project stage: Response to RAI ML22026A3942022-01-26026 January 2022 NRR E-mail Capture - Request for Additional Information - Vogtle, Units 1 and 2, TS 3.7.2 LAR Project stage: RAI NL-22-0055, Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3.7.2 Limiting Condition for Operation to Remove One Main Steam Isolation Valve System2022-02-28028 February 2022 Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3.7.2 Limiting Condition for Operation to Remove One Main Steam Isolation Valve System Project stage: Response to RAI ML22116A0842022-07-0505 July 2022 Issuance of Amendment Nos. 215 and 198, Regarding Revision to Technical Specification 3.7.2, Main Steam Isolation Valves (Msivs) Project stage: Approval 2021-09-30
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Category:E-Mail
MONTHYEARML24206A0252024-07-20020 July 2024 NRR E-mail Capture - for Your Comments - State of Georgia - Vogtle Unit 1 - Emergency License Amendment Request for Technical Specification 3.7.9 ML24199A1592024-07-17017 July 2024 NRR E-mail Capture - Request for Additional Information - Vogtle 3 and 4 - Exemption for the Requirements in 10 CFR 50.71 Pertaining to the Submittal of Updated Final Safety Analysis Report ML24198A1672024-07-16016 July 2024 NRR E-mail Capture - Acceptance Review Vogtle 3 and 4 - License Amendment Request Changes to Technical Specification 3.7.6, Main Control Room Emergency Habitability System (Ves) Surveillance Requirement L-2024-LLA-0083 ML24197A1572024-07-15015 July 2024 NRR E-mail Capture - Acceptance Review - Farley and Vogtle 1 and 2, LAR - TSTF-589, Eliminate Automatic Diesel Generator Start During Shutdown ML24197A0172024-07-12012 July 2024 NRR E-mail Capture - Fyi - Acceptance Review - Farley and Vogtle 1 and 2 - Alternative Request for Pressurizer Welds ML24194A0032024-07-11011 July 2024 NRR E-mail Capture - Fyi - Acceptance Review - Farley, Hatch, and Vogtle 1 and 2 - Alternative Request for Code Case N-572 ML24180A0012024-06-26026 June 2024 NRR E-mail Capture - Acceptance Review Farley 1 and 2 and Vogtle 1 and 2 - Proposed Inservice Inspection Alternative GEN-ISI-ALT-2024-002 for Steam Generator Welds in Accordance with 10 CFR 50.55a(z)(1) (L-2024-LLR-0041) ML24170A9362024-06-18018 June 2024 NRR E-mail Capture - Fyi - Change to Estimated Completion Date for the SNC Fleet Physical Barrier Exemptions (L-2023-LLE-0018 and L-2023-LLE-0021) ML24178A3422024-05-16016 May 2024 NRR E-mail Capture - Request for Call - Proposed Vogtle 3 & 4 Tier 1 and Tier 2 Exemptions and LAR ML24120A0462024-04-29029 April 2024 COL Docs - Re Fyi - SNC Notification Received of Vogtle Unit 4 - Completion of Power Ascension Tests ML24120A0262024-04-29029 April 2024 COL Docs - FW Vogtle Electric Generating Plant, Unit 4 - Project Manager Reassignment ML24119A0012024-04-28028 April 2024 COL Docs - Fyi - SNC Notification Received of Vogtle Unit 4 - Completion of Power Ascension Tests ML24108A0132024-04-16016 April 2024 NRR E-mail Capture - (External_Sender) Responses from Wednesday 4/10/2024 Call with Southern Nuclear Operating Co. Vogtle 3&4 Licensing Actions ML24107A9322024-04-15015 April 2024 Document Request for Vogtle Electric Generating Plant Units 1 & 2 - Radiation Protection Inspection Report 2024-02 ML24107A7292024-04-15015 April 2024 Request for Vogtle Electric Generating Plant Units 1 & 2 - Radiation Protection Inspection - Inspection Report 2024-02 ML24106A0522024-04-12012 April 2024 NRR E-mail Capture - Acceptance Review - Vogtle 1 and 2 - Emergency Diesel Generator (EDG) Voltage and Frequency License Amendment Request (LAR) (L-2024-LLA-0031) ML24100A7842024-04-0909 April 2024 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) - Vogtle, Units 3 and 4 - Alternative Request for Explosively Actuated Valves (L-2023-LLR-0016) ML24099A0372024-04-0505 April 2024 NRR E-mail Capture - Acceptance Review - Vogtle Unit 3, License Amendment Request (LAR) Technical Specification (TS) 5.5.13, Ventilation Filter Testing Program (VFTP) - L-2024-LLA-0043 ML24095A2412024-04-0404 April 2024 NRR E-mail Capture - Acceptance Review for the Exemption Request Regarding the Final Safety Analysis Report Update Schedule at Vogtle, Units 3 and 4 ML24072A3982024-03-12012 March 2024 NRR E-mail Capture - for Your Action - Second Round Request for Additional Information (RAI) - Vogtle, Unit 1 - SG Tube Inspection Report - 1R24 (L-2023-LRO-0067) ML24061A2372024-03-0101 March 2024 SNC Email Dated March 1, 2024, Regarding SNC Response to NRC Letter for Vogtle 3 & 4 RES Info ML24057A0872024-02-23023 February 2024 NRR E-mail Capture - Acceptance Review - Alternative Request for Explosively Actuated Valves at Vogtle, Units 3 and 4 ML24046A1352024-02-15015 February 2024 COL Docs - Fyi - SNC Notification Received of Vogtle Unit 4 - Completion of Initial Criticality and Low-Power Testing ML24039A1122024-02-0808 February 2024 COL Docs - Re Fyi - SNC Notification Received of Vogtle Unit 4 Completion of Pre-Critical Tests ML24039A1922024-02-0808 February 2024 COL Docs - Correction - Re Fyi - SNC Notification Received of Vogtle Unit 4 Completion of Pre-Critical Tests ML24039A0882024-02-0808 February 2024 COL Docs - Fyi - SNC Notification Received of Vogtle Unit 4 Completion of Pre-Critical Tests ML24031A0502024-01-31031 January 2024 COL Docs - FW Erroneous Description of Tier 2 Change Process in Construction Lessons-Learned Report ML24017A1122024-01-17017 January 2024 NRR E-mail Capture - Request for Access to Cyber Security Data - Vogtle, Units 3 and 4 ML23360A0042023-12-23023 December 2023 NRR E-mail Capture - Fyi - Office of Nuclear Regulatory Research (RES) Requests for Vogtle 3 & 4 ML23348A0782023-12-13013 December 2023 NRR E-mail Capture - Voluntary Request for Closed Meeting Regarding Cyber Security Assessments at Vogtle, Units 3 and 4 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) ML23331A9992023-11-27027 November 2023 COL Docs - Re Re Re ML23079A125 - Vogtle Electric Generating Station, Unit 3, NRC Response Letter to P. Durand, Regarding Comment on Federal Register Notice License Amendment No. 189 ML23331A9492023-11-26026 November 2023 Email Dated November 26, 2023, from Bo Pham to SNC and NRC - Vogtle Seismic Hazard Report ML23326A2802023-11-22022 November 2023 COL Docs - Re Re ML23079A125 - Vogtle Electric Generating Station, Unit 3, NRC Response Letter to P. Durand, Regarding Comment on Federal Register Notice License Amendment No. 189 ML23331A9622023-11-22022 November 2023 Email Dated November 22, 2023, from SNC to NRC - Vogtle Seismic Hazard Report ML23320A0342023-11-16016 November 2023 COL Docs - Re Acceptance Review of Southern Nuclear Operating Companys License Amendment Request to Remove Combined License Appendix C (EPID No. 2023-LLA-0123) ML23312A2632023-11-0808 November 2023 COL Docs - Action Request for State of Georgia Comment by 5pm Monday, November 13, 2023 - Vogtle Units 3&4, LAR-22-002, TS 3.8.3, Inverters - Operating Completion Time Extension ML23320A2372023-11-0808 November 2023 NRR E-mail Capture - (External_Sender) Proposed LAR Regarding the Ultimate Heat Sink at Vogtle, Units 1 and 2 ML23311A1512023-11-0707 November 2023 COL Docs - Re Acceptance Review of Southern Nuclear Operating Companys License Amendment Request to Remove Combined License Appendix C (EPID No. 2023-LLA-0123) ML23304A2272023-10-31031 October 2023 NRR E-mail Capture - Request for State of Georgia Comment by 5pm Monday, Nov. 6, 2023 - License Amendment Request for Vogtle Unit 4 - to Remove Combined License Appendix C ML23289A1362023-10-16016 October 2023 COL Docs - Action Request for State of Georgia Comment by 5pm Friday, October 20, 2023 - Vogtle Units 3&4, LAR-23-006, Rev.1, More Restrictive Action for Tech. Spec. 3.1.9 ML23283A0332023-10-10010 October 2023 COL Docs - FW Vogtle Units 3 and 4 (LAR 23-009) ML23283A0452023-10-0808 October 2023 E-Mail Re Plant Vogtle - Neop Letter Dated October 8, 2023 - Vogtle 3 & 4 - TS 3.7.6 License Amendment Request 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) ML23275A1002023-10-0202 October 2023 COL Docs - Re Action Summary of 9.27.23 Clarification Call with Southern Nuclear Company on LAR-22-0002, TS 3.8.3 Inverters - Operating Completion Time ML23270B1912023-09-27027 September 2023 COL Docs - Update Vogtle Units 3&4 Acceptance Letter for LAR-22-002 Technical Specification 3.8.3, Inverters Operating ML23263A1042023-09-20020 September 2023 COL Docs - FW Fyi for Tomorrow'S Psm Meeting 2024-07-20
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML24199A1592024-07-17017 July 2024 NRR E-mail Capture - Request for Additional Information - Vogtle 3 and 4 - Exemption for the Requirements in 10 CFR 50.71 Pertaining to the Submittal of Updated Final Safety Analysis Report ML24100A7842024-04-0909 April 2024 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) - Vogtle, Units 3 and 4 - Alternative Request for Explosively Actuated Valves (L-2023-LLR-0016) ML24072A3982024-03-12012 March 2024 NRR E-mail Capture - for Your Action - Second Round Request for Additional Information (RAI) - Vogtle, Unit 1 - SG Tube Inspection Report - 1R24 (L-2023-LRO-0067) 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) 2024-07-17
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Text
From: Lamb, John Sent: Thursday, December 16, 2021 8:48 AM To: Lowery, Ken G.
Subject:
REQUEST FOR ADDITIONAL INFORMATION - Vogtle, Units 1 and 2, TS 3.7.2 LAR (EPID: L-2021-LLA-0178)
Importance: High
- Ken, By letter dated September 30, 2021 (Agencywide Documents Access and Management System Accession No. ML21274A073), to the U.S. Nuclear Regulatory Commission (NRC), Southern Nuclear Operating Company (SNC, the licensee) submitted a license amendment request (LAR) for Vogtle Electric Generating Plant (Vogtle), Units 1 and 2. The proposed amendment would revise the Vogtle, Units 1 and 2, Technical Specification (TS) 3.7.2 Main Steam Isolation Valves (MSIVs). The TS Limiting Condition for Operation (LCO) currently requires two MSIV systems per main steam line be operable in Mode 1, and Modes 2 and 3 with exceptions. The licensee proposes to change TS 3.7.2, LCO, to require four MSIVs and their associated actuators and associated bypass valves be operable in Mode 1, and Modes 2 and 3 with exceptions.
After reviewing the LAR, the NRC staff requests a response to the request for additional information (RAI) given below.
On December 7, 2021, the NRC staff provided draft RAI questions to SNC to make sure that the RAIs are understandable, the regulatory basis is clear, to ensure there is no proprietary information, and to determine if the information was previously docketed. On December 16, 2021, a clarifying call was held and SNC stated that it would provide the RAI response within 30 days of the date of this email.
If you have any questions, you can contact me at 301-415-3100.
Sincerely, John REQUEST FOR ADDITIONAL INFORMATION (RAIs)
Regulatory Basis Title 10 of the Code of Federal Regulations (10 CFR) Part 50, Appendix A, General Design Criteria (GDC) 2, Design bases for protection against natural phenomena, requires, in part, that structures, systems, and components important to safety shall be designed to withstand the effects of natural phenomena such as earthquakes, without loss of capability to perform their safety functions
10 CFR Part 50, Appendix A, GDC 4, Environmental and dynamic effects design bases, requires, in part, that structures, systems, and components important to safety shall be designed to accommodate the effects of and to be compatible with the environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, including loss-of-coolant accidents. These structures, systems, and components shall be appropriately protected against dynamic effects, including the effects of missiles, pipe whipping, and discharging fluids, that may result from equipment failures and from events and conditions outside the nuclear power unit.
10 CFR Part 50, Appendix A, GDC 17, Electric power systems, requires, in part, that an onsite electric power system and an offsite electric power system shall be provided to permit functioning of structures, systems, and components important to safety. The safety function for each system (assuming the other system is not functioning) shall be to provide sufficient capacity and capability to assure that (1) specified acceptable fuel design limits and design conditions of the reactor coolant pressure boundary are not exceeded as a result of anticipated operational occurrences and (2) the core is cooled and containment integrity and other vital functions are maintained in the event of postulated accidents.
10 CFR Section 50.63, Loss of all alternating current power, requires, in part, that each light-water-cooled nuclear power plant licensed to operate under this part must be able to withstand for a specified duration and recover from a station blackout.
EEEB - RAI-3 Please clarify the impact of the MSIV actuator load change on the electrical distribution system to demonstrate the assured operation of the MSIVs and that it will not impede operation of other critical loads, in accordance with GDC 17. Please include details of new or reused/existing cabling to demonstrate adequate capacity for the additional load.
EEEB - RAI-4 Please provide calculation summary that clearly demonstrates impact of actuator load change on Station Blackout (SBO) coping strategy including updated battery loading and battery charger capacity, in accordance with 10 CFR 50.63.
EEEB - RAI-5 Please clarify that any new or modified electric cable and related conduit will be appropriately protected from missiles in accordance with GDC 4. Based upon the NRC staffs review of LAR discussions regarding GDC 4, it is not clear that new or modified electrical cables and conduits are also included in protection against missiles.
EEEB - RAI-6 Please clarify that the proposed MSIV actuators and any new cable and conduit are seismically qualified in accordance with GDC 2. Based upon the NRC staffs review of LAR discussions regarding GDC 2, it is not clear that the proposed MSIV actuators or any new electrical cables and conduit are seismically qualified along with other non-electrical components that are subject to this LAR.
EEEB - RAI-7 Please discuss how each MSIV actuator will meet single failure criterion in accordance GDC 17 for power supply.
Hearing Identifier: NRR_DRMA Email Number: 1458 Mail Envelope Properties (MN2PR09MB508402B10C1B42D0B27919A9FA779)
Subject:
REQUEST FOR ADDITIONAL INFORMATION - Vogtle, Units 1 and 2, TS 3.7.2 LAR (EPID: L-2021-LLA-0178)
Sent Date: 12/16/2021 8:47:40 AM Received Date: 12/16/2021 8:47:00 AM From: Lamb, John Created By: John.Lamb@nrc.gov Recipients:
"Lowery, Ken G." <KGLOWERY@southernco.com>
Tracking Status: None Post Office: MN2PR09MB5084.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 5109 12/16/2021 8:47:00 AM Options Priority: High Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: