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Category:Meeting Summary
MONTHYEARML24222A6992024-08-16016 August 2024 August 6, 2024, Summary of Regarding Potential License Amendment Request Change to Surveillance Requirements for Moderator Temperature Coefficient for Millstone, Unit No. 3, North Anna, Unit Nos. 1 and 2, and Summer, Unit No. 1 - ML24124A1272024-05-0606 May 2024 April 22, 2024 Public Meeting Summary - 2023 Annual Assessment Meeting Re Virgil C. Summer Nuclear Station ML24036A2942024-02-13013 February 2024 Virgil. C. Summer Nuclear Station, Unit No. 1 - Summary of January 25, 2024, Public Meeting with Dominion Energy South Carolina, Inc. Concerning Review of New Seismic Hazard Information ML23325A2452023-11-13013 November 2023 Enclosure 2 - Dominion Slides ML23325A2442023-11-13013 November 2023 Enclosure 1 - Attendance List ML23325A2432023-11-13013 November 2023 Regulatory Conference Summary ML23331A7892023-11-0909 November 2023 Nov. 2023 Enviro Scoping Meetings Related to the V.C. Summer Subsequent License Renewal Application Meeting Summary ML23171A9172023-06-20020 June 2023 Summary of Meeting Concerning the V.C. Summer Nuclear Station, to Discuss Annual Assessment for Period Jan 1, 2022 Through December 31, 2022 ML22270A2042022-09-30030 September 2022 Summary of Meeting Regarding a Potential Request to Modify the Reactor Vessel Surveillance Capsule Withdrawal Schedule for VC Summer ML22151A3332022-05-31031 May 2022 Public Meeting Summary 2021 Annual Assessment Meeting Regarding the V.C. Summer Nuclear Station, Docket No. 50-395, Meeting Number 20220449 ML21131A1612021-05-11011 May 2021 Public Meeting Summary - 2020 Annual Assessment Meeting Regarding Virgil C. Summer Nuclear Station, Docket No. 50-395; North Anna Power Station, Docket Nos. 50-338 and 50-339; and Surry Power Station, Docket Nos. 50-280 and 50-281, Meeting ML20213B1672020-08-13013 August 2020 July 23, 2020, Summary Regarding Second Pre-Application Meeting to Discuss Proposed Technical Specification Task Force-425 License Amendment Request ML20181A0052020-07-13013 July 2020 June 24, 2020, Summary Regarding Pre-Application Meeting to Discuss Proposed Technical Specification Task Force-425 License Amendment Request (EPID-L-2020-LRM-0049) ML20105A1482020-04-10010 April 2020 Public Meeting Summary Virgil C. Summer Nuclear Station ML19196A2112019-08-0202 August 2019 July 23, 2019, Meeting Summary Regarding National Fire Protection Association 805 Supplement License Amendment Request ML19123A1332019-05-0101 May 2019 Public Meeting Summary - V.C. Summer Nuclear Station, Docket No. 50-395 to Provide Opportunities to Discuss Annual Assessment of V.C Summer Nuclear Station with the Public for Period of January 01, 20018 - December 31-2018 ML19086A0272019-04-12012 April 2019 April 4, 2019, Meeting Summary Regarding Pre-application Meeting to Discuss Two Proposed Relief Requests ML18144A1482018-05-24024 May 2018 Public Meeting Summary - Virgil C. Summer Nuclear Station Docket No. 50-395 ML18068A0272018-03-22022 March 2018 Summary of March 15, 2018, Pre-Application Meeting with South Carolina Electric and Gas Company to Discuss a Future NFPA-805 Amendment (EPID-L-2018-LRM-0015) ML17103A5222017-04-12012 April 2017 Annual Assessment Meeting Summary 2017 ML15126A1962015-05-0505 May 2015 April 16, 2015 Public Meeting Summary - Category 1 - Virgil C. Summer Nuclear Station Units 2 and 3 Annual Assessment ML15119A5102015-04-29029 April 2015 Meeting Summary with Members of the Public Concerning the Annual Assessment of of Virgil C. Summer Nuclear Station, Unit 1, in Blair, S.C ML14106A4762014-04-16016 April 2014 End of Cycle 2013 Public Meeting Memo ML13225A2932013-08-12012 August 2013 7/23-24/2013, Summary of Meeting 2013 U.S. Nuclear Regulatory Commission (NRC) Initial Exam Writers' Workshop ML13199A1772013-07-31031 July 2013 Summary, June 20, 2013 Category 1 Meeting with South Carolina Electric and Gas Company, to Discuss Voluntary Fire Protection Risk Initiative Self-Assessment ML13123A1472013-05-0303 May 2013 Summary of Category 1 Public Meeting with South Carolina Electric and Gas,Virgil C. Summer Nuclear Station, Units 2 and 3, Annual Assessment ML13119A4112013-04-29029 April 2013 Summary of Category 3 Public Meeting, Virgil C. Summer Nuclear Station, Unit 1, Annual Assessment ML13098A8442013-04-11011 April 2013 Summary of Meeting with South Carolina Electric & Gas to Discuss Proposed Emergency Plan Changes ML12157A0452012-06-0404 June 2012 5/24/2012 - Summary of Category 3 Public Meeting - Virgil C. Summer Nuclear Station Unit 1 Annual Assessment and NRC Construction Oversight of Units 2 and 3 Combined Licenses ML1120707482011-07-26026 July 2011 July 20, 2011, Meeting Summary Pre-Application Meeting with South Carolina Electric and Gas Regarding General License Independent Spent Fuel Storage Installation Plans (TAC No. L24544) ML11152A0802011-06-14014 June 2011 Summary of March 31, 2011, Meeting with South Carolina Electric and Gas Company to Discuss NFPA-805 License Amendment ML1115204542011-06-0101 June 2011 Summary of Public Meeting with South Carolina Electric & Gas Co., V. C. Summer to Discuss the NRC Reactor Oversight Process and Annual Assessment ML1023804682010-08-26026 August 2010 08/18/10 Summary of Meeting NRC Initial Exam Writer'S Workshop ML1016704282010-06-17017 June 2010 Meeting Summary Notice ML0930005732009-11-0505 November 2009 Summary of September 14, 2009, Public Conference Call to Discuss Responses to Generic Letter 2004-02 Requests for Additional Information ML0923803922009-08-26026 August 2009 08/11-12/2009-Summary of Meeting Re 2009 Us NRC Initial Exam Development Workshop ML0911000692009-04-17017 April 2009 Summary of Meeting with Public/Open House to Discuss NRC Reactor Oversight Process and the Annual Assessment of the Virgil C. Summer Nuclear Station ML0835204162008-12-16016 December 2008 Public Meeting Summary, Virgil C. Summer Nuclear Station, Docket No. 05-395 IR 05000395/20075022007-07-30030 July 2007 Summary of Public Meeting - Virgil C. Summer Nuclear Station, to Discuss Significance on Apparent Violation Documented in Inspection Report 50-395-07-502 ML0713500592007-05-11011 May 2007 Summary of Public Meeting with South Carolina Electric & Gas Company to Brief the Licensee'S Post Outage Review of Refueling Outage 16 at Virgil C. Summer Nuclear Station IR 05000395/20070022007-04-30030 April 2007 IR 05000395-07-002; on 01/01/2007 - 03/31/2007 for South Carolina Electric & Gas Company; Virgil C. Summer Nuclear Station, Integrated Inspection Report and Annual Assessment Meeting Summary ML0627605282006-10-24024 October 2006 September 13, 2006, Summary of Meeting with South Carolina Electric & Gas Re Generic Letter 96-06 (TAC No. M96872) ML0627800022006-10-0404 October 2006 Summary for Meeting Between NRC and South Carolina Electric & Gas Company Refueling Outage 16 at Virgil Summer ML0621305672006-08-0101 August 2006 Summary of 07/19 - 07/20/2006 Meeting - 2006 Initial Exam Development Workshop ML0609601222006-04-0303 April 2006 Summary of Meeting with South Carolina Electric & Gas Company to Discuss the Results of the Root Cause Evaluation for the High Failure Rate on the January 10, 2006, Operator Licensing Initial Written Examination ML0601705522006-01-17017 January 2006 Comment Card Responses During January 9 Through 10, 2006, NRC Public Workshop ML0600304322005-12-30030 December 2005 Public Meeting Summary - Oct. 18, 2005 Category 1 Public Meeting-Summer, Docket # 50-395 ML0509704712005-04-0707 April 2005 Meeting Summary - Public Meeting - Virgil C. Summer Nuclear Power Station ML0504901422005-02-17017 February 2005 Summary of January 13, 2005, Meeting Between the U.S. Nuclear Regulatory Commission (NRC) and Nuclear Energy Institute (NEI) on Updating the License Renewal Guidance Documents ML0331404862003-11-0606 November 2003 ,Summary of Public Meetings to Discuss the Draft Supplement 15 of the Generic Environmental Impact Statement for the Renewal of the V. C. Summer Nuclear Station Operating License 2024-08-16
[Table view] Category:Slides and Viewgraphs
MONTHYEARML24250A1072024-09-0505 September 2024 Pre-Submittal Meeting Slides for VCS COLR Relocation and WCAP-17661 LAR - 9-9-24 ML24101A0642024-04-22022 April 2024 2023 Annual Public Assessment Meeting Presentation Slides ML24008A2112024-01-25025 January 2024 Evaluation of Seismic Risk for V. C. Summer Under the Process for Ongoing Assessment of Natural Hazard Information (Poanhi) - January 25, 2024 (Slides) ML24008A2182024-01-25025 January 2024 Seismic Data to Support Public Meeting with Dominion Regarding NRC Staff Evaluation of Seismic Risk at V.C. Summer Generating Station - January 25, 2024 (Tables) ML23325A2452023-11-13013 November 2023 Enclosure 2 - Dominion Slides ML23313A1292023-11-0909 November 2023 Environmental Scoping Meeting for V.C. Summer Subsequent License Renewal Application - November 14 Meeting Slides ML23312A0202023-11-0808 November 2023 Environmental Scoping Meeting for V.C. Summer Subsequent License Renewal Application-Virtual Meeting Slides ML23131A4182023-05-25025 May 2023 V.C. Summer Nuclear Station 2022 Annual Assessment Meeting.Pptx ML22115A0502022-04-21021 April 2022 VC Summer, 2021 Annual Assessment Meeting ML20091G7232020-03-31031 March 2020 V.C. Summer 2019 Assessment Meeting Presentation ML18144A1482018-05-24024 May 2018 Public Meeting Summary - Virgil C. Summer Nuclear Station Docket No. 50-395 ML18067A1212018-03-15015 March 2018 March 15, 2018, Public Meeting Presentation Regarding NFPA-805 Application ML17087A1542017-03-28028 March 2017 Response to Request for Additional Information on VC Summer Sfpli - Elevation View ML14323A4522014-11-19019 November 2014 V.C. Summer Construction Update ML14266A3912014-09-23023 September 2014 September 23, 2014, Category 1 Public Meeting with V. C. Summer - Presentation Slides ML14232A5372014-08-21021 August 2014 8-21-14 CIP Mtg Slides - FFD and ITAAC ML14219A4762014-08-0707 August 2014 Operating Experience on Initial Test Program ML14057A4202014-02-27027 February 2014 Public Meeting 2/27/2014 VCS Construction Update ML14028A4272014-01-23023 January 2014 Vendor Inspection Finding & ITAAC (Pdf) ML13309A8592013-11-0505 November 2013 V. C. Summer Construction Status and Lesson Learned AD Torres ML13170A1192013-06-18018 June 2013 Public Slide - Control Room Evacuation Due to Fire, Based on NFPA 805 ML13170A1302013-06-18018 June 2013 Public Slide - NFPA 805 Transient Combustible Controls ML13123A1472013-05-0303 May 2013 Summary of Category 1 Public Meeting with South Carolina Electric and Gas,Virgil C. Summer Nuclear Station, Units 2 and 3, Annual Assessment ML13098A8042013-03-26026 March 2013 Combined Emergency Plan Review ML12228A6292012-08-16016 August 2012 Report ITAAC Presentation ML12157A0452012-06-0404 June 2012 5/24/2012 - Summary of Category 3 Public Meeting - Virgil C. Summer Nuclear Station Unit 1 Annual Assessment and NRC Construction Oversight of Units 2 and 3 Combined Licenses ML11350A0902011-12-20020 December 2011 Draft VC Summer Public Meeting 20 Dec 2011 ML11242A0502011-08-30030 August 2011 Slides - Licensee Perspective on ITAAC Completion Process NRC Commission Briefing ML1120707792011-07-26026 July 2011 Enclosure 3: Presentation Slides/Handouts ML1115204732011-06-0101 June 2011 Meeting Summary - V. C. Summer - Presentation Slides ML1016705202010-06-17017 June 2010 Fire Protection Screening Criteria - V.C. Summer Nuclear Station ML1012600102010-05-0505 May 2010 Meeting Slides ML1012600092010-05-0505 May 2010 Meeting Posters ML0835204162008-12-16016 December 2008 Public Meeting Summary, Virgil C. Summer Nuclear Station, Docket No. 05-395 ML11216A2292008-12-0202 December 2008 0523 - R504P - Westinghouse Advanced Technology - 07.2 VC Summer Inadvertent Criticality ML0811405532008-04-23023 April 2008 V. C. Summer Nuclear Station, Slides - Refuel 17 Plans ML0723400122007-08-22022 August 2007 Public Outreach Meeting South Carolina E&G Summer Nuclear Power Plant Combined License Application IR 05000395/20075022007-07-30030 July 2007 Summary of Public Meeting - Virgil C. Summer Nuclear Station, to Discuss Significance on Apparent Violation Documented in Inspection Report 50-395-07-502 ML0715806282007-05-31031 May 2007 Enclosure 8 - OBE Exceedance Issues ML0713500972007-05-0202 May 2007 Meeting Handout on Alternate Safety Power Source - Summer ML0713500662007-05-0202 May 2007 Meeting Handout on RF16 Outage Review V.C. Summer ML0713501022007-05-0202 May 2007 Meeting Handout on RB Tendon/Iwe/Iwl Inspection ML0713501062007-05-0202 May 2007 Meeting Handout on CRDM Canopy Seal Clamp Installation ML0713501092007-05-0202 May 2007 Meeting Handout on Summary of HP Performance During RF16 ML0706703232007-03-0101 March 2007 (Westinghouse AP1000) ML0627602452006-09-27027 September 2006 V. C. Summer Nuclear Station RF-16 Outage Information ML0618002632006-09-18018 September 2006 Crack Growth Rates in a PWR Environment of Nickel-Base Alloys from Davis-Besse and V. C. Summer Plants ML0707202262006-06-22022 June 2006 Sce&G VC Summer Site - Site Characterization Visit (Handouts) ML0615106012006-05-23023 May 2006 EPRI HRA Users Group Review of Draft NUREG-1842 ML0609702982006-03-31031 March 2006 NRC Cy 2005 Annual Assessment Meeting, Virgil C. Summer Nuclear Station 2024-09-05
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VCSNS A EDG Fuel Oil Leak Regulatory Conference Significance Determination Discussion Robert Justice Site Vice President VC Summer Nuclear Station, Dominion Energy 1 November 13, 2023 Enclosure 2
Apparent Violation Significance Discussion
- We agree with the apparent violation and facts as written and have asked for the Regulatory Conference to provide amplifying risk determination information, which was not available to the Significance and Enforcement Review Panel on Sept 13th.
- We understand that the Emergency Diesel Generators (EDGs) are safety significant pieces of equipment and we must have a reverence for maintaining them appropriately, to aggressively address any reliability concerns.
- The station acknowledges the performance deficiency documented in the AV and has responded by taking significant corrective actions including both short-term and planned long-term corrective actions, in accordance with our Root Cause Evaluation (RCE), to ensure EDG reliability.
2 November 13, 2023 Enclosure 2
Apparent Violation Significance Discussion
- The direct cause of the A EDG FO Leak was a crack at the threaded section of the 3/4 schedule 40 Carbon Steel Pipe. Failure was due to high cycle mechanical fatigue.
- Immediately following the November 2, 2022 event, the failed fuel oil pipe was replaced on A EDG, retested satisfactorily, and returned to operable status on November 3, 2022. For Extent of Condition, the associated fuel oil piping was replaced on the B EDG on March 14, 2023. No fuel oil leaks have occurred on either EDG since the November 2, 2022 event.
- VCSNS has completed a RCE to further understand and correct the organizational, process, and equipment aspects of the event. Insights include Corrective Action (CA) Program process weaknesses, FO system design vulnerabilities and inadequate management oversight. We look forward to sharing our lessons learned and CAs during the follow-up NRC inspections.
3 November 13, 2023 Enclosure 2
Response to A EDG Fuel Oil Leak
- We are independently evaluating our regulatory performance, in aggregate, utilizing 3rd party and fleet oversight as our present regulatory performance is unacceptable.
- VCSNS is currently pursuing an EDG fuel oil piping design change to improve the design margin of the system with implementation, scheduled to be completed by the end of the first quarter 2024.
- We believe that the new amplifying risk determination information provided in the letter dated October 31, 2023 supports a final significance determination of White (Low to Moderate Safety Significance) for the issue described in the finding (EA-23-093).
4 November 13, 2023 Enclosure 2
VCS Nuclear Safety Improvements
- Over the last 20 years, we have made the following plant enhancements to improve nuclear safety and reduce plant risk:
Installed a dedicated underground power source from a nearby hydro-electric plant Added an alternate RCP seal injection pump with independent diesel generator Installed low leakage Flowserve N9000 RCP seals fitted with an abeyance seal to minimize RCS leakage upon loss of AC power Transitioned from Appendix R to NFPA 805 Fire Protection Program Implemented robust Flex/BDB Strategies including:
Purchased 2 portable 7.2 KV 1 MW Combustion Turbine Generators to power a safety bus Added 300 KW diesel generators to the Electrical Building (EB) and Auxiliary Electrical Buildings (AEB) to power a DC bus Purchased 2 portable diesel-powered Emergency Backup Ultimate Heat Sink and 2 RCS Make-Up Pumps Two 80 KW portable diesel generators 5 November 13, 2023 Enclosure 2
VCS A EDG Fuel Oil Leak Risk Assessment John Harrell Nuclear Safety Engineering Manager Dominion Energy Services Innsbrook Technical Center, Glen Allen, VA 6 November 13, 2023 Enclosure 2
=
Background===
- NRCs preliminary assessment of Yellow significance was made using the best available information at the time of the Significance and Enforcement Review Panel meeting on Sept 13th.
- Dominion Energy report with supplemental information for the determination of safety significance provided to NRC by letter dated October 31, 2023.
- This supplemental information was not available to NRC at the time of their preliminary assessment of risk significance.
- This information reflects currently installed and available plant equipment, existing station operating procedures, and validated operator actions.
- The updated assessment concludes that combined risk from fire, internal events/internal flooding, and seismic events meets criteria for a White risk significance.
7 November 13, 2023 Enclosure 2
Background (Continued)
- The information we are providing supplements the NRC Senior Risk Analysts preliminary assessment
- Key facts and assumptions are consistent with NRCs assessment:
Both assessments consider the successful operation of the A EDG during the exposure window to determine exposure time Conservative and simplifying time-zero assumption - both NRCs and Dominion Energys preliminary risk assessments assumed postulated failures of accident-mitigating equipment at the same time as the initiating event
- Preliminary assessments highlighted significant risk contribution of that Station Blackout (SBO) scenarios concurrent with random Turbine Driven Emergency Feed Water Pump (TDEFWP) failure
- Refinements with time dependence pursued to address unnecessarily conservative initial risk assessment results 8 November 13, 2023 Enclosure 2
Overview of Risk Assessment
- In response to the identified Apparent Violation, Dominion Energy has updated the V. C. Summer Fire PRA to:
Apply existing FLEX strategies in PRA accident sequences involving early failures of the Turbine Driven Emergency Feedwater Pump
- The application of existing FLEX strategies to the Fire PRA was enabled by:
The initial six-hour period of successful EDG A operation Validating specific FLEX strategies for this assessment
- The supplemental analysis demonstrates that application of FLEX strategies:
Supports the assessment of risk significance as White
- The information to be presented was not available to NRC at the time of the preliminary significance determination.
9 November 13, 2023 Enclosure 2
Timeline of Analyzed FLEX Scenarios in FPRA t0 = 0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />
- B Train Safeguards AC Unavailable
- SG Level Maintained t1 = 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />
- Station Blackout condition
- SG Level begins decreasing t2 = 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br />
- Core Damage Prevented t3 = 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Mission Time 10 November 9, 2023 Enclosure 2
Supplemental Information - Feed Water
- Six-hour period of successful EDG A Operation considered for use of currently available plant equipment, established procedures, and established operator actions to mitigate an SBO.
- Model updates to Fire PRA were made consistent with ASME/ANS RA-Sa-2009.
- Changes to Fire PRA only; no changes to internal events/internal flooding or seismic.
- Three established methods of restoring steam generator (SG) feed water (FW) for heat removal credited:
Energizing one installed Motor Driven Emergency Feed Water Pump (MDEFWP) using two-of-two available Combustion Turbine Generators (CTGs)
Staging and connecting the portable FLEX SG feed pump Using one-of-two available pumper trucks to supply SG FW
- Each method uses maintained and confirmed available equipment.
- Each method has been quantified in risk assessment using appropriate industry, plant-specific, and generic data sources.
- Each method included operator validations.
11 November 13, 2023 Enclosure 2
Supplemental Information - Battery Chargers
- SBO scenarios also recognized as involving depletion of station batteries.
- Two established methods of charging station batteries to prevent depletion and preserve SG level indication and control capability:
Aligning one-of-two installed, available, and connected Electrical Building (EB) and Auxiliary Electrical Building (AEB) diesel generators to power a DC bus Aligning one-of-two CTGs to energize a battery charger by way of 7.2kV switch gear
- Model updates to Fire PRA were made consistent with ASME/ANS RA-Sa-2009.
- Changes to Fire PRA only; no changes to internal events/internal flooding or seismic.
- Each method uses maintained and confirmed available equipment.
- Each method has been quantified in risk assessment using appropriate industry, plant-specific, and generic data sources.
- Each method included operator validations.
12 November 13, 2023 Enclosure 2
Results and Conclusion
- Combined internal events, internal flood, seismic PRA risk, and fire risk analysis results including the supplemental information for the identified deficiency and calculated exposure time:
Change in Core Damage Frequency (CDF) calculated to be 5.49E-06/yr Change in Large Early Release Frequency (LERF) calculated to be 4.10E-07/yr
- Results are well below Yellow risk threshold of 1E-5/yr (CDF) and 1E-6/yr (LERF/yr).
- Dominion Energy has high confidence in this conclusion based upon:
Margin to the color thresholds Availability of other areas for further refinement not pursued (see supplemental report)
- No Key PRA Assumptions were identified.
- Dominion Energy respectfully requests consideration of the supplemental information in NRCs assessment of significance for this issue.
13 November 13, 2023 Enclosure 2