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BWR Vent Order Implementation Workshop II. April 9 -10, 2014 Baltimore. Workshop Purpose and Plan. Phase 1 (wet well) template for Overall Implementation Plans for NRC Order EA-13-109. - PowerPoint PPT Presentation


  • BWR Vent Order Implementation Workshop IIApril 9 -10, 2014Baltimore

  • Workshop Purpose and PlanPhase 1 (wet well) template for Overall Implementation Plans for NRC Order EA-13-109.

    Review order requirements and accepted approach to complying with Phase 1 of the Order being developed in conjunction with the NRC.

    Focus on the detailed physical and analytic elements of implementation.

  • BWR Mark I/II Severe Accident Vent OrderKey DatesOrder issued June 6, 2013; two phasesSevere accident wetwell vent by June 30, 2018Severe accident drywell vent by June 30, 2019Option to demonstrate drywell vent not neededGuidance NEI 13-02 R.0 and JLD-ISG-2013-02 R.0Phase 1 (WW) Guidance issued November 2013Developing template for Overall Integrated Plan for meeting Order.BWROG developing engineering guidance for vent.Phase 2 (DW) Guidance by April 2015

  • Venting and Filtering StrategiesBWR Mark I and IIPrevent core damage during SBO/ELAPVenting via hardened wetwell vent Water injection via FLEXFollowing core damage during SBO/ELAP, prevent containment failureVenting via hardened wetwell and/or drywell ventWater injection via beyond FLEXFiltering releases via containment water injection and pressure control

  • Phase 1 Activities Timeline Post OIP Template DevelopmentJune 2014

    July Aug 2014

    Oct 2014

    Dec 2014 Dec 2014 Phase 1 OIP due

    Develop 6-month status template

    Phase 1 pilot plant ISE issued

    All Phase 1 plant ISE issued

    1st 6-month status due

  • Estimated Phase 2 Guidance Timeline Mar 2014 NEI Working Group define goals and approach for Phase 2 Apr May 2014 NEI WG draft 13-02 Phase 2 scope from Industry perspectiveJun Sep 2014 NRC/NEI Draft 13-02 Phase 2 scope Oct 2014 NEI/BWROG Industry Comment and Feedback Nov 2014 NEI Phase 2 Draft Revision Provided to NRC for reference in ISG Dec 2014 NRC publish draft ISG for public comment Feb 2015 NRC Public comment period closed Mar 2015 NRC Issues approved ISG Mar 2015 NEI/NRC Workshop on Phase 2 Apr May 2015 NRC/NEI OIP Template structure and content without Pilots May Jul 2015 NRC/NEI OIP Template Pilots including Option for No DW Vent Pilot Aug 2015 NEI/BWROG Draft OIP To Industry for Comment for Workshop Sep 2015 NEI/NRC OIP Workshop on Pilots and Template use Oct 2015 NEI OIP finalized and included in a revision to 13-02 Dec 2015 Stations OIP due to NRC


  • Industry DocumentsTemplate timeline

    FAQ & White Paper Process

    Selected Template Elements

    GenericPlant Hatch PilotNine Mile Point 2 Pilot

  • Template Development Information and Key Dates Template DevelopmentPilot plant(s) identified Hatch as MK I & NMP2 as MK II Draft template by January 20, 2014 Presented on Jan 15Final Draft template March 15, 2014 After PilotsNEI 13-02 Revision for OIP template and FAQs by April 21, 2014NRC-NEI Joint Template Meetings January 15, 2014 Complete (Draft Template & 3 FAQ)January 29, 2014 (Template Elements & FAQs)February 19, 2014 (Pilot Plant Hatch, FAQs & White Papers) March 5, 2014 (NMP2 Pilot Differences, FAQ & White Paper) March 26, 2014 (NRC Feedback on OIP Pilots/Workshop Prep)Industry Template Workshop, April 9-10 in BaltimoreNRC-NEI Check-up Conference Call Proposed for May 7

  • Frequently Asked QuestionsClarification items brought to industry NEI 13-02 core team NEI 13-02 Core Team to provide consensus responseSelect FAQs presented to the NRC staff in draft version (interpretation FAQs) Final FAQ documented on NEI websiteClarification items larger than FAQ will be resolved via other means of NEI 13-02 revision or white paper endorsementPhase 2 revision of NEI 13-02 will incorporate appropriate FAQs or white papers

  • Frequently Asked QuestionsFAQ HCVS-01, 02, 03, 04, 05, 06, 07 and 08 have been submitted for NRC Concurrence

    FAQ NumberNEI 13-02 SectionSubjectHCVS-014.2.2, 4.2.3HCVS Primary Controls and Alternate Controls and Monitoring LocationsHCVS-021.2.6HCVS Dedicated EquipmentHCVS-031.2.5, 1.2.6, 4.2.3HCVS Alternate Control Operating MechanismsHCVS-044.1.5HCVS Release PointHCVS-054.1.4, 4.1.6, 6.2HCVS Control and Boundary ValvesHCVS-06MultipleFLEX Assumptions/HCVS Generic AssumptionsHCVS-074.2.5Consideration of Release from Spent Fuel Pool AnomaliesHCVS-084.2.2, 4.2.4HCVS Instrument QualificationsHCVS-09MultipleUse of Toolbox Actions for Personnel

  • White Paper TopicsHCVS-WP-01: HCVS Dedicated Motive ForceScope of operator actions for selected HCVS electrical and pneumatic supplies HCVS-WP-02: HCVS Cyclic Operations ApproachAccident sequenceNumber of vent cyclesRadiological limitations from HCVS operationHCVS-WP-03: Hydrogen/CO Control MeasuresPassive measuresActive measures HCVS-WP-04: FLEX/HCVS InteractionsPortable equipment use under severe accident and BDBEE conditions


  • Template ElementsTemplate Goals:Use Hybrid 050/049 Template with Order and ISG (NEI 13-02) Cross ReferenceDirectly align to the ISGDescribe the phased approach to implementationBig picture schedule statementWetwell performance objectivesDiscuss the section 1.1 objectives of attachment 2 in order Discuss the requirements in sections 4.1, 4.2 and 6.1 and appendix's F and G of NEI 13-02Drywell performance objectivesQuality standardsProgrammatic requirementsLinkage to ISE or SE

  • Template ElementsProposed Template with Order and ISG (NEI 13-02) Cross Reference:IntroductionPart 1:General Integrated Plan Elements and Assumptions Part 2:Boundary Conditions for WW Vent with specifics about the compliance actions relative to the ISG and NEI 13-02 section 2Part 3:Boundary Conditions for DW Vent with specifics about the compliance actions relative to the ISG and NEI 13-02 section 3 Part 4:Programmatic Controls, Training, Drills and Maintenance Elements Part 5:Milestone table elements Attachment 1:Portable EquipmentAttachment 2:Sequence of Events TimelineAttachment 3:Conceptual Sketches Attachment 4:Failure Evaluation TableAttachment 5:ReferencesAttachment 6:Changes/Updates to this OIPAttachment 7:Open Items in HCVS OIP

  • Template ElementsPart 1: General Integrated Plan Elements and AssumptionsKey Site assumptions to implement NEI 13-02 strategiesGrouping of Assumptions as FLEX, Generic and Site Specific.Considering making an FAQ on FLEX assumptions and one on Generic to use as a reference in the template.

  • Template ElementsPart 2: Boundary Conditions for WW Vent with specifics about the compliance actions relative to the ISG and NEI 13-02 section 2Severe Accident First 24Beyond 24 hoursSupport Equipment FunctionsBDBEE VentingSevere Accident Venting *

  • Template ElementsPart 4: Programmatic Controls, Training, Drills and Maintenance Elements

    Part 5: Milestone table elements

    AttachmentsAttachment 1: Portable EquipmentAttachment 2: Sequence of Events TimelineOperator action constraints timeline is determined based on the following sequences:Sequence 1 is a FLEX run with Venting in a BDBEE without core damage. Sequence 2 is based on SECY-12-0157 results for a prolonged SBO (ELAP) with the delayed loss of RCIC Sequence 3 is based on SOARCA results for an SBO (ELAP) with failure of RCIC to inject.**

  • Representative BWR Venting TimelinesSBOt=0sRCIC startst .5 mt 5 hrsNo InjectionLegendAdequate core cooling maintainedInjection LostIncreased shine and leakage of radionuclides primarily from WetwellHCVS Post Core Damage Dose Evaluation Required Level at TAFt 23 hrsAnticipatory VentingNot to scalet 18 hrsNo Injectiont 24 hrst 34 hrst 1 hrt 8 hrContainment Venting(based on exceeding PCPL)Containment Venting(anticipatory venting not represented in SECY-12-0157)Case 1Ref: PlantCase 2Ref: SECY-12-0157Case 3Ref: SOARCAReferences:Case 1: Reference Plant FLEX Overall Integrated PlanCase 2: SECY-12-0157 ML12344A030Case 3: SOARCA ML13150A053

    Portable generator providing power to Safety Related 480VAC System(Ref Plant OIP)


  • Hatch SA HCVS Pilot Template ElementsReview of Plant Hatch completion of items in revision C3 of the Severe Accident HCVS OIP Template

  • Nine Mile Point Unit 2SA HCVS Pilot Template Major DifferencesReview of Nine Mile Point Unit 2 Major Differences from Mark I pilot for Severe Accident HCVS OIP Template

  • Hatch OIP Major Elements Adding Site Characteristics important to HCVSControl Building and Rx Building LayoutMain Stack and vent pipe locationsTime and Environmental Constraint ItemsRupture discHCVS OperationBattery power actions>24 Hour motive force

  • NMP2 OIPSite Characteristics Important to HCVSThe primary location for HCVS operation will be the Main Control RoomThe alternate location for HCVS operation will be the Reactor Building track bay, northeast side of Reactor Building, ground elevationThe HCVS release point will be at least 3 feet above the top of the Reactor Building on the northwest side of the Reactor Building

  • t 11 hrsBegin monitoring at MCR or ROP HCVS pneumatic and battery status. No replenishment expected to be required before t = 24 hours t 24 hrsReplenishment of HCVS power and pneumatic suppliesHatch HCVS Venting Timelinest=0sSBOt .5 mRCIC startst 7 hrsAnticipatory VentingNo InjectionLegendAdequate core cooling maintainedInjection LostIncreased shine and leakage of radionuclides primarily from WetwellHCVS Post Core Damage Dose Evaluation Required HCVS Time evaluation requiredLevel at TAFt 23 hrsNot to scalet 18 hrsNo Injectiont 24 hrst 34 hrst 1 hrt 8 hrsCase 1FLEX SuccessfulRef: HNP FLEX OIPCase 2RCIC Late FailureRef: SECY-12-0157Case 3RCIC Early FailureRef: SOARCAR