ML14245A018

Oconee, Units 1, 2 and 3 - Third Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order No. EA-12-04)

ML14245A018
Person / Time
Site:	Oconee
Issue date:	08/27/2014
From:	Batson S L Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
EA-12-049, ONS-2014-118
Download: ML14245A018 (12)

Text

Scott L. BatsonDUKE Vice PresidentENERGY Oconee Nuclear StationDuke EnergyONOIVP I 7800 Rochester HwySeneca, SC 29672ONS-2014-118 o: 864.873.3274f. 864.873. 4208Scott.Batson@duke-energy.comAugust 27, 201410 CFR 50.4ATTN: Document Control DeskU.S. Nuclear Regulatory CommissionWashington, DC 20555Duke Energy Carolinas, LLC (Duke Energy)Oconee Nuclear Station, Units 1, 2 and 3Docket Numbers 50-269, 50-270, 50-287Renewed License Numbers DPR-38, DPR-47, and DPR-55

Subject:

Third Six-Month Status Report in Response to March 12, 2012, Commission OrderModifying Licenses with Regard to Requirements for Mitigation Strategies forBeyond-Design-Basis External Events (Order Number EA-12-049)

References:

1. Nuclear Regulatory Commission (NRC) Order Number EA-1 2-049, Order ModifyingLicensees With Regard to Requirements for Mitigation Strategies for Beyond-Design-BasisExternal Events, dated March 12, 2012, (Accession No. ML12054A735).2. Oconee Nuclear Station's Overall Integrated Plan in Response to March 12, 2012,Commission Order to Modify Licenses With Regard To Requirements for MitigationStrategies for Beyond-Design-Basis External Events (Order EA-12-049), datedFebruary 28, 2013.3. Oconee Nuclear Station's Second Six-Month Status Report in Response toMarch 12, 2012 Commission Order Modifying Licenses With Regard to Requirements forMitigation Strategies for Beyond-Design-basis External Events (Order NumberEA-12-049), dated August 29, 2013.Ladies and Gentlemen,On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued Order EA-12-049(Reference 1) to direct Duke Energy to develop guidance and strategies to maintain or restorecore cooling, containment, and spent fuel pool cooling capabilities in the event of a beyond-design-basis external event. The Order required that, after NRC's issued its final Interim StaffGuidance (ISG), Duke Energy would submit an Overall Integrated Plan (OIP), followed by statusreports at six-month intervals.Duke Energy has submitted the OIP (Reference 2) and two six-month reports (Reference 3) forOconee Nuclear Station. The purpose of this letter is to provide the third six-month statusreport. The enclosure provides updates related to OIP changes, if any, for the six-month periodfollowing the second six-month reporting period.This letter contains no new Regulatory Commitments and no revision to existing RegulatoryCommitments.Should you have any questions regarding this submittal, please contact David Haile withOconee Regulatory Affairs, at (864) 873-4742.

ONS-2014-118August 27, 2014Page 2I declare under penalty of perjury that the foregoing is true and correct. Executed onAugust 27, 2014.Sincerely,Scott L. BatsonVice PresidentOconee Nuclear Station

Enclosure:

Oconee Nuclear Station, Third Six-Month Status Report for Order EA-12-049 (FLEX),Units 1, 2, and 3.

ONS-2014-118August 27, 2014Page 3cc:Mr. Victor McCree, Regional AdministratorU.S. Nuclear Regulatory Commission -Region IIMarquis One Tower245 Peachtree Center Ave., NE Suite 1200Atlanta, Georgia 30303-1257Mr. Daniel Dorman, (Acting) Director, Office of Nuclear Reactor RegulationU.S. Nuclear Regulatory CommissionOne White Flint North,11555 Rockville Pike, M/S 13-H16MRockville, MD 20852-2738Mr. James R. Hall, Project Manager (ONS)(by electronic mail only)U.S. Nuclear Regulatory Commission11555 Rockville Pike, M/S O-8G9ARockville, MD 20852-2746Mr. Eddy CroweNRC Senior Resident InspectorOconee Nuclear Station ENCLOSURE[9 pages including cover]Oconee Nuclear Station (ONS)Third Six Month Status Report for Order EA-1 2-049 (FLEX),Units 1, 2, and 3Encl. Page -1 ENCLOSURE: ONS THIRD SIX-MONTH STATUS REPORT for ORDER EA-12-049 (FLEX)(Note: The references for this Enclosure are listed in Section 8)1) IntroductionOn March 12, 2012, the Nuclear Regulatory Commission (NRC) issued Order EA-12-049(Reference El) to Duke Energy which required the development of guidance and strategiesrelated to mitigation of a beyond-design-basis external event. The Order required each plant toissue an Overall Integrated Plan (OIP) pursuant to the NRC's Interim Staff Guidance (ISG)(Reference E2) which endorsed, with clarifications and exceptions, the industry guidancedocument, NEI 12-06 (Reference E3). The Order also required that update reports on progressor change to the OIP be submitted every six months.An Overall Integrated Plan (Reference E4) was developed based on the diverse and flexiblestrategies (FLEX) from NEI 12-06 and was submitted to the NRC on February 28, 2013. Thefirst six-month update was provided to the NRC on August 29, 2013 (Reference E5). Thesecond six-month update was provided to the NRC on February 28, 2014 (Reference E19).This report constitutes the third six-month update, and reports milestone accomplishments,changes to the compliance method or schedule, or any need for relief/relaxation, and the basis,which occurred during the period from January 29, 2014 to July 28, 2014 (hereafter referred toas "the update period").2) Milestone Accomplishments (during the update period)The following milestone(s) were completed:1. The second six month status report was submitted February 28, 2014.2. Based on current strategies, the N-1 Outage Walkdowns for Oconee Unit 3 weredeemed as not necessary. Thus, that milestone is considered to have been completed.3) Milestone Schedule StatusThe following represents the milestone status at the end of the update period. The table reflectsupdates to the milestone table in Attachment 2 of the Overall Integrated Plan. It provides thestatus of each activity, and whether the target completion date has changed.Note: The dates are planning dates, and are subject to change as design and implementationdetails are developed. Revised target completion dates are not expected to impact theimplementation date(s) of the Order., Target.Completion -Revised Target-Milestone Date Activity Status Completion DateLicensing Actions:Submit Overall Integrated Plan Feb 2013 Complete Date Not RevisedSubmit 6 Month Update 1 Aug 2013 Complete Date Not RevisedSubmit 6 Month Update 2 Feb 2014 Complete Date Not RevisedSubmit 6 Month Update 3 Aug 2014 This Submittal Date Not RevisedSubmit 6 Month Update 4 Feb 2015 Not Started Date Not RevisedSubmit 6 Month Update 5 Aug 2015 Not Started Date Not RevisedSubmit 6 Month Update 6 Feb 2016 Not Started Date Not RevisedSubmit 6 Month Update 7 Aug 2016 Not Started Date Not RevisedModifications:Develop Modifications Aug 2016 Started Date Not RevisedEncl. Page -2 ENCLOSURE: ONS TFIRD SIX-MONTH STATUS REPORT (ORDER EA-12-049) (FLEX)(Note: The references for this Enclosure are listed in Section 8)Target TCompletion Revised TargetMilestone Date -Activity Status Completion DateProcurement:Identify Significant Material/Equipment Sept 2013 Complete Date Not RevisedMaterial/Equipment May 2015 Started Date Not RevisedProcurement/DeliveryImplementation Walkdowns:Conduct N-I Outage Walkdowns -U I Nov 2014 Not Started Date Not RevisedConduct N-I Outage Walkdowns -U2 Nov 2013 Complete Date Not RevisedConduct N- I Outage Walkdowns -U3 May 2014 Complete Date Not RevisedConduct Implementation Walkdowns -U I Oct 2016 Not Started Date Not RevisedConduct Implementation Walkdowns -U2 Oct 2015 Not Started Date Not RevisedConduct Implementation Walkdowns -U3 April 2016 Not Started Date Not RevisedStaffing: *_*_ ._ -__ ._.Conduct Staffing Analysis July 2016 Started Date Not RevisedTraining: ....._ _Develop Training program -U I July 2016 Not Started Date Not RevisedDevelop Training program -U2 July 2015 Not Started Date Not RevisedDevelop Training program -U3 Jan 2016 Not Started Date Not RevisedImplement Training -U1 Oct 2016 Not Started Date Not RevisedImplement Training -U2 Oct 2015 Not Started Date Not RevisedImplement Training -U3 April 2016 Not Started Date Not RevisedProcedures:Develop FLEX Supporting Guidelines June 2016 Started Date Not Revised(FSGs)Develop Maintenance Procedures June 2016 Not Started Date Not RevisedRegional Response Centers:Develop Strategies/Playbook with RRC April 2015 Started Date Not RevisedInstall Offsite Delivery Pad March 2015 Not Started Date Not RevisedImplementation:dNoImplement Modifications -U I Nov 2016 Started Date Not RevisedImplement Modifications -U2 Nov 2015 Started Date Not RevisedImplement Modifications -U3 May 2016 Started Date Not Revised4) Changes to Compliance MethodNo changes to compliance methods that are alternatives to NEI 12-06 were made.Encl. Page -3 ENCLOSURE: ONS THIRD SIX-MONTH STATUS REPORT (ORDER EA-12-049) (FLEX)(Note: The references for this Enclosure are listed in Section 8)5) Need for Relief and Basis for the ReliefDuke Energy Carolinas, LLC (Duke Energy), Oconee Nuclear Station, Units 1, 2, and 3anticipates meeting the Order implementation date and no relief is required at this time.6) Open Items from Overall Integrated Plan and Draft Safety EvaluationThe following tables provide a summary status of the Open Items. The table under Section 6.a.provides the open items identified in the original OIP submitted on February 28, 2013. Thetable under Section 6.b. provides a list of open items that were added after February 28, 2013and in the first and second six-month status reports submitted by Reference E5 & ReferenceE19 respectively. The table under Section 6.c. provides a list of open items related to the InterimStaff Evaluation (ISE) (Reference E20). Section 6.d. addresses any generic concerns.a) Open Items Documented in the Overall Integrated PlanOverall Integrated Plan Open Items Status1. Revised PMP IMR5 1 Analysis In Progress: 2.1 Flood Re-analysisCompleted -Pending NRC Approval2. Max flood level on site 'after modifications' In Progress: 2.1 Flood Re-analysis_ Completed -Pending NRC Approval3. Deployment Path Program Not Started4. Procedures and FSGs Started5. FLEX Equipment Programmatic Control Started6. Personnel Training Not Started7. FLEX Basis Document Started8. Configuration Control Not Started9. RRC Started10. Cooldown Analysis Started11. ADV Survivability and Accessibility Started12. Load Shed Analysis Not Started13. Hydraulic Analysis for Pump Flow (Intake Canal to SGs) Completed. Analysis results areacceptable. (Reference E23)14. Fuel Oil Consumption Started15. Hydraulic Analysis for Pump Flow (CTP-1 to SGs) Completed. Analysis results areacceptable. (Reference E23)16. Water in embedded CCW lines & Hydraulic Analysis for StartedPumping Configuration17. PSW Modification (EC 91877) Started18. Alternate FLEX Connections Modification (SG Makeup) Completed. (Reference E24)19. Breaking Siphons in Embedded CCW Piping Started20. Instrumentation Repower (Alternate Repower Strategy) Started21. FLEX Equipment Storage Started22. Portable Power Distribution (Primary Repower Strategy) Started23. Long term SG and SFP Makeup StartedEncl. Page -4 ENCLOSURE: ONS THIRD SIX-MONTH STATUS REPORT (ORDER EA-12-049) (FLEX)(Note. The references for this Enclosure are listed in Section 8)Overall Integrated Plan Open Items. Status24. Hydrogen Buildup Analysis Started25. BWST Tap Analysis and Modification (RCS Makeup) Started26. Containment Analysis Started27. Hydraulic Analysis for Pump Flow (CTP-1 to SFPs & Not StartedIntake Canal to SFPs)Completed: Validated SFP Refill28. Robustness of SFP Refill Lines Lines are installed as QA-I and areseismically robust.(References E6 & E7)29. Lighting Evaluation Not Started30. Communication Assessment Started31. NEI 12-01 Staffing Study Started32. HVAC Analysis Startedb) Open Items added after February 28th, 2013Open Items Status33. Evaluate changes to the RCSMU FLEX Strategyrecommended by independent audit to eliminate the SSF StaedRCMUP repower strategy and implement train specificdiesel powered pump strategies (primary and alternate).34. Evaluate changing the alternate repower FLEX strategy toenhance deployment times by utilizing a small 120 VACportable diesel generator (approximately 6000 watts) Starteddeployed on the Turbine Building deck to provide 120VAC feeds to connections in the control room and cableroom to repower the key instrumentation parameters.35. Validate the 10' assumed inundation level discussed in theOIP [Assumption #8] is still conservative with respect to Completed: CAPthe Defense in Depth Modifications analyzed in OIPreference 48 (which used a slightly modified model run) (Reference E8)and the credited CAL model run in OIP reference 14.36. Perform raw water fouling analysis for core cooling and Staedheat removal.37. Evaluate freeze protection requirements in areas of the Not Startedplant that contain equipment used in FLEX strategies.38. Evaluate and establish a technical basis for use of non-safety related, installed equipment credited for mitigating Startedan ELAP event.39. FLEX Strategy for Shutdown Modes: Determine whatmods, procedures, equipment, etc. is needed to support a StartedShutdown Modes FLEX Strategy.Encl. Page -5 ENCLOSURE: ONS THIRD SIX-MONTH STATUS REPORT (ORDER EA-12-049) (FLEX)(Note: The references for this Enclosure are listed in Section 8)c) Interim Staff Evaluation (ISE)Open Items Status1. Provide a description and justification for the specificevaluation model(s) used in the ELAP analyses for Oconee Not Started(ISE Open Item # 3.2.1.1.A).2. The licensee should either (1) develop a successfulmitigating strategy that does not rely on repowering the SSFRCMU pumps following recession of floodwaters or (2) Not Startedprovide adequate justification that the SSF RCMU pumps canreliably be repowered following recession of floodwaters(ISE Open Item # 3.2.1.6.A).3. Provide adequate basis that nitrogen from the core floodtanks will not be injected into the reactor coolant system (ISE Not StartedOpen Item # 3.2.1.6.B).4. When further analyses are completed, the licensee shouldprovide additional information that either supports aconclusion that pressurizer relief or safety valves do not lift Not Startedduring the ELAP event or that lifting of the valve(s), if itoccurs, is acceptable (ISE Open Item # 3.2.1.6.C).5. Provide additional information demonstrating successfulmitigation of an ELAP event involving an uncontrolledcooldown resulting from consequential damage to the main Not Startedsteam system due to the severe natural hazard that initiatesthe ELAP event (ISE Open Item # 3.2.1.6.D).6. Demonstrate that Oconee's approach for modeling boric acidmixing is consistent with a generically acceptablemethodology or develop a plant-specific technical basis to Not Startedsupport the modeling assumptions for boric acid mixing inthe ELAP analysis for Oconee (ISE Open Item # 3.2.1.8.B).d) Generic ConcernsThe following summarizes ONS's review of six (6) generic issues:1. Electric Power Research Institute (EPRI) Report 3002001785, Use of ModularAccident Analysis Program (MAAP) in Support of Post-Fukushima Applicationsand NRC endorsement (Reference E9 & Reference E18).* The Oconee mitigating strategy is evaluated using RELAP5 and RETRAN for theNSSS response, and FATHOMS and GOTHIC for the containment response.2. Electric Power Research Institute (EPRI) Report 3002000623, Nuclear MaintenanceApplications Center: Preventive Maintenance Basis for FLEX Equipment and NRCendorsement (Reference El0 & Reference Ell).* ONS intends to follow EPRI Report 30002000623 in the development of maintenanceand testing programs for equipment acquired in response to Mitigation StrategiesOrder EA-12-049 unless otherwise justified.Encl. Page- 6 ENCLOSURE: ONS THIRD SIX-MONTH STATUS REPORT (ORDER EA-12-049) (FLEX)(Note: The references for this Enclosure are listed in Section 8)3. Westinghouse report, Westinghouse Response to NRC Generic Request forAdditional Information (RAI) on CENTS Code in Support of the Pressurized Waterreactor Owners Group (PWROG) and NRC endorsement (Reference E12 &Reference E13).* The Oconee mitigating strategy is evaluated using RELAP5 and RETRAN for theNSSS response, and FATHOMS and GOTHIC for the containment response.4. Nuclear Energy Institute (NEI) position paper, Position Paper: Shutdown/RefuelingModes and NRC endorsement (Reference E14 & Reference E15).* It is Oconee's intent to abide by the NEI position paper for shutdown and refuelingmodes.5. Nuclear Energy Institute (NEI) white paper, Battery Life Issue and NRCendorsement (Reference E16 & Reference E17).* For FLEX strategy planning purposes (resource allocation, debris removal, Phase 2deployment, etc.) for T=O events, the SSF will be relied on for approximately 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />sfor Phase 1 or one third of the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> SSF design mission time. All instrumentreadings required to support the ELAP cool down are available in the SSF during thisPhase 1 time period. This will allow time to deploy the primary repower strategy torepower the vital battery chargers and associated busses without performing additionalload shedding. This approach eliminates resources required to perform additional loadshedding activities on all 3 units in the T+2, to T+3 hour timeframe in which manycritical activities are underway and eliminates potential unanticipated interactionscreated by load shed activities. Based on the above, the station vital batteries will beavailable for approximately 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> after loss of power.6. Westinghouse position paper, Westinghouse Response to NRC Generic Requestfor Additional information (RAI) on Boron Mixing in support of the PressurizerWater Reactor Owners Group (PWROG) and NRC endorsement (Reference E21 &Reference E22).* Oconee Nuclear Station will address this generic issue in the ISE Open Item #3.2.1.8.B.7) Potential Interim Staff Evaluation ImpactsThere are no potential impacts from the Interim Staff Evaluation identified.Encl. Page -7 ENCLOSURE: ONS THIRD SIX-MONTH STATUS REPORT (ORDER EA-12-049) (FLEX)(Note: The references for this Enclosure are listed in Section 8)8) ReferencesThe following references support the updates to the Overall Integrated Plan described in thisenclosure:El. NRC Order Number EA-12-049, Order Modifying Licenses with Regard to Requirementsfor Mitigation Strategies for Beyond-Design-Basis External Events, dated March 12, 2012(Accession No. ML12054A735).E2. NRC Interim Staff Guidance JLD-ISG-2012-01, Compliance with Order EA-2-049, OrderModifying Licenses with Regard to Requirements for Mitigation strategies for Beyond-Design-Basis External Events, dated August 29, 2012 (Accession No. ML1 2229A1 74).E3. NEI 12-06, Revision 0, Diverse and Flexible Coping Strategies (FLEX) ImplementationGuide, dated August 2012 (Accession No. ML12242A378).E4. Duke Energy Letter, Oconee Nuclear Station, Units 1,2 and 3 Overall Integrated Plan inResponse to March 12, 2012 Commission Order Modifying Licenses with Regard toRequirements for Mitigation Strategies for Beyond-Design-Basis External Events (OrderNumber EA-12-049), dated February 28th, 2013.E5. Duke Energy Letter, First Six-Month Status Report in Response to March 12, 2012,Commission Order Modifying Licenses with Regard to Requirements for MitigationStrategies for Beyond-Design-Basis External Events (Order Number EA-12-049), datedAugust 29, 2013.E6. Flow Diagram -Unit 1 & 2 Spent Fuel Cooling System (104A-1.1, Revision 53).E7. Flow Diagram -Unit 3 Spent Fuel Cooling System (104A-3.1, Revision 48).E8. ONS 2013 Corrective Action Program document -8140.E9. EPRI Report 3002001785, Use of Modular Accident Analysis Program (MAAP) in Supportof Post-Fukushima Applications, dated June 2013 (Accession No. ML13190A201).E10. EPRI Report 3002000623, Nuclear Maintenance Applications Center: PreventiveMaintenance Basis for FLEX Equipment, dated September 2013 (Accession No.ML13276A573).Ell. NRC letter from Jack R. Davis, Director Mitigating Strategies Directorate (NRR), toNuclear Energy Institute, Mr. Joseph E. Pollock Vice President Nuclear Operations, datedOctober 7, 2013 (Accession No. ML13276A224).E12. Westinghouse Report, Westinghouse Response to NRC Generic Request for AdditionalInformation (RAI) on CENTS Code in Support of the Pressurized Water reactor OwnersGroup (PWROG), dated September 25, 2013 (Withheld from public disclosure).El3. NRC letter from Jack R. Davis, Director Mitigating Strategies Directorate (NRR), to JackStringfellow, PWR Owners Group, Program Management -Westinghouse, October 7,2013 (Accession No. ML13276A555).E14. NEI Position Paper, Shutdown/Refueling Modes, dated September 18, 2013 (AccessionNo. ML13273A514).E15. NRC letter from Jack R. Davis, Director Mitigating Strategies Directorate (NRR), toNuclear Energy Institute, Mr. Joseph E. Pollock, Vice President Nuclear Operations, datedSeptember 30, 2013 (Accession No. ML13267A382).E16. NEI White Paper, Battery Life Issues, dated August 21, 2013 (Accession No.ML13241A186).Encl. Page -8 ENCLOSURE: ONS THIRD SIX-MONTH STATUS REPORT (ORDER EA-12-049) (FLEX)(Note: The references for this Enclosure are listed in Section 8)E17. NRC letter from Jack R. Davis, Director Mitigating Strategies Directorate (NRR), toNuclear Energy Institute, Mr. Joseph E. Pollock, Vice President Nuclear Operations, datedSeptember 16, 2013 (Accession No. ML13241A188).E18. NRC letter from Jack R. Davis, Director Mitigating Strategies Directorate (NRR), toNuclear Energy Institute, Mr. Joseph E. Pollock, Vice President Nuclear Operations, datedOctober 3, 2013 (Accession No. ML13275A318).E19. Duke Energy Letter, Second Six-Month Status Report in Response to March 12, 2012,Commission Order Modifying Licenses with Regard to Requirements for MitigationStrategies for Beyond-Design-Basis External Events (Order Number EA-12-049), datedFebruary 28, 2014.E20. NRC letter from Jeremy S. Bowen, Mitigating Strategies Directorate (NRR), Mr. ScottBatson, Site Vice President Oconee Nuclear Station, dated February 10, 2014 (AccessionNo. ML 13365A258).E21. Westinghouse Position Paper, Westinghouse Response to NRC Generic Request forAdditional Information (RAI) on Boron Mixing in support of the Pressurizer Water ReactorOwners Group (PWROG), dated August 16, 2013 (Accession No. ML13235A135).E22. NRC letter from Jack R. Davis, Director Mitigating Strategies Directorate (NRR), to JackStringfellow, PWR Owners Group, Program Management -Westinghouse, dated January8, 2014 (Accession No. ML13276A183).E23. ONS Hydraulic Analysis Calculation -11232.E24. ONS Engineering Change Document -113065.Encl. 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