ML14191A046
| ML14191A046 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 07/10/2014 |
| From: | Dutton K, James Shea Tennessee Valley Authority |
| To: | Plant Licensing Branch II |
| Hon A DORL/LPL2-2 301-415-8480 | |
| References | |
| Download: ML14191A046 (14) | |
Text
SequoyahandWattsBarNuclearPlants 5th QuarterlyUpdatefortheFloodMitigationSystem July10,2014
Agenda IntroductionJoeShea,VicePresident NuclearLicensing ImprovedFloodMitigationSystemUpdateKevinDutton,Senior Manager,Projects ClosingRemarksJoeShea,VicePresident NuclearLicensing 2
TVACommitment July1,2013lettertotheNRC Thefollowingkeyelementswillremainfixedasthesystemdesignevolves throughthedesignprocess:
- Finalimplementationdateof12/31/16.Specificdesignalternatives andinterimmilestoneswillbediscussedaspartoftheperiodic updates
- Installationofnewlydesignedmeansforremovingreactordecayheat andprovidingreactorcoolantsystemmakeupandcriticalitycontrol includingprotectedsourcesofpowerthatareinadditiontothe existinglicensingbasisfloodmodesystems
- Assurancethattheimprovedfloodmodesystemskeyfunctionswill beprotectedfromfloodlevelsnolessthan15abovetheexisting designandlicensingbasis 3
Develop Project Plan Develop System Design Criteria Identify Initial System Design Functions Develop High-Level System Design Requirements Define Initial System Scope Develop Initial Project Schedule and Estimate Conduct Pre-Project Risk Identification Develop Conceptual Design Document Revise Risk Register and Risk Management Strategies.
Conduct Plant Walkdowns Reflecting Conceptual Design Develop Design Schedule and Estimate Evaluate Design and Component Alternatives Identify Long-Lead Items Develop Initial Implementation Schedule and Estimate Draft 10% DCN Development and Review Design Schedule and Estimate Evaluate Long-Lead Vendor Alternatives High level Implementation Schedule and Estimate Conceptual Design Risk Register and Risk Management Strategies Development of Functional Requirements Project Planning Conceptual Design Phase Preliminary Design Phase TransitionfromCommitmenttoDesign 4
TransitionfromCommitmenttoDesign 5
Implementation Phase System Turnover And Closure Phase Complete Engineering Develop Implementation Schedule and Estimate based on 10% DCN Develop Detailed Pre-Outage and Outage Work Schedules Conduct Detailed Design and Operational Walkdowns Identify Detailed Commodity Needs Procure Long-Lead Materials Revise Risk Register and Mitigation Strategies to address Completed Design, Implementation Work Plans and Materials Detailed Engineering Schedule and Estimate Plan Implementation Work Orders Engineering And Long Lead Procurement Phase Complete Physical Implementation Conduct System Testing Perform QA/QC Verifications of As-built Update Design Documentation Implement Project Controls to Monitor Progress Against Resource Loaded Schedule Plan Implementation Work Orders Update Procedures/Conduct Training Turnover System Close Work Orders, DCNs and POs Verify Documentation Complete Evaluate and Document Lessons-Learned
ProjectStatus ProjectStatusSchedule 6
Task Scheduled Start Scheduled Finish Status 1
TeamOrganization Structure 05/29/13 Completed 2
Develop ProjectPlan 10/30/13 Completed 3
PerformConceptualDesign Phase 10/30/13 Completed 4
Perform PreliminaryDesign Phase 10/01/13 04/30/14 Completed 5
Conduct EngineeringDesign Phase 5/01/14 04/30/15 In Progress 6
Procure LongLeadItems 11/1/14 1/29/15 Not Started 7
Implementation 5/1/15 12/15/16 Not Started
FloodModeMitigationSystem 7
FloodModeMitigationSystemOperation
- FMMSOperation
- DecayHeatRemoval
>> InjectwaterwithnewFMMSintoTDAFWheaderat~90psigat
~120gpm
>> ControldecayheatremovalbymanualoperationofS/G AtmosphericReliefValves
>> MonitorS/GsPressureandLevel
- RxCoolantSystemandCriticalityControl
>> InjectboratedwaterwithnewFMMSintoRCSupto~500psigat
~20gpm
>> MonitorRCSHotLegtemperaturewithPZRLevelandPressure
- SpentFuelPoolMakeup
>> MonitorSpentFuelPoollevelwithremotelevelindication
>> AddwaterwithnewFMMS,asneeded 8
FMMSDecayHeatRemovalSubSystem 9
BeyondDesignBasis FloodElevation SQN-734 WBN-754.2
FMMSRCSMakeupSubSystem 10 BeyondDesignBasis FloodElevation SQN-734 WBN-754.2
FMMSElectricalSchematic 11
FLEX225kVAD/G EnclosureFrame Hardened Enclosure 12
FMMSSpentFuelPoolMakeupFunction 13 BeyondDesignBasis FloodElevation SQN-734 WBN-754.2
ProjectStatus
- 10%DesignChangeNotice(DCN)iscomplete
- RequestForProposalforFinalDCNwasissued7/3/14to designvendors
- ContractAwardforDCNisscheduledfor8/11/14
- FundingisauthorizedforEngineeringDesignPhase(task5)
- DCNIssuedateis4/30/15
- FMMSstrategycoordinatedwithFLEXimplementation
- DedicatedoversightTeam
- StationsengagedandalignedwithFMMSapproach
- Plantconstructabilitywalkdowns performed 14