ML15133A082

ISFSI Presentation Slides - TN-32 High Burnup Dry Storage Research Project, May 13, 2015 (Tom Brookmire)

ML15133A082
Person / Time
Site:	North Anna
Issue date:	05/13/2015
From:	Brookmire T Dominion, Virginia Electric & Power Co (VEPCO)
To:	Janice Nguyen Spent Fuel Licensing Branch
Nguyen J
References
Download: ML15133A082 (24)

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NorthAnnaISFSI North Anna ISFSI TN-32 High Burnup Dry StorageResearch ProjectTom Brookmire May 13, 2015 Ag enda Background g*Background

• Fuel Selection Update & Project Milestones

• HBUCaskSpecifics&Confinement

• HBU Cask Specifics & Confinement

• License Changes

• InSituGasSampling

• In Situ Gas Sampling*ISFSI License Renewal 2High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch ProjectStorage of a TN-32 cask with high

Background

burnup fuelReferred to as the TN-32 HBU CaskNorth Anna ISFSICask monitoring to provide valuable data for storage of high burnup fuel

(>45,000 MWd/MtU) 3High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch ProjectIitilihtf359/t455/

Finalized Fuel SelectionI n iti a l enr i c h men t ranges f rom 3.59 w/o t o 4.55 w/oAverage assembly burnup ranges from 50.0 GWd/MtU to 55.5 GWd/MtUAs of July 1, 2017Payload heat load is just under 37 kWDecay times range from 5.31 years to 30.2 yearsAssembly decay heat values range from 696 Watts to 1511 WattsAverage assembly decay heat is 1155 WattsPeak cladding best estimate temperatures during drying expectedtobeapproximately340

°C expected to be approximately 340 C 4High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch Project12 (TC Lance)34ZirloM5ZirloZirlo Design Loading Plan54.2 GWd/MtU53.4 GWd/MtU54.3 GWd/MtU51.9 GWd/MtU4.25%, 3cy, 11yr4.55%, 3cy, 8yr4.25%, 3cy, 11yr4.25%, 3cy, 13yr1013 W1167 W1015 W909 W56 (TC Lance)78910ZirloM5M5M5M5Zirlo52.1 GWd/MtU52.0 GWd/MtU51.2 GWd/MtU50.5 GWd/MtU53.3 GWd/MtU55.5 GWd/MtU425%3cy13yr455%3cy6yr455%3cy5yr455%3cy5yr455%3cy8yr42%3cy17yr 4.25%, 3cy , 13yr 4.55%, 3cy , 6yr 4.55%, 3cy , 5 yr 4.55%, 3cy , 5 yr 4.55%, 3cy , 8yr 4.2%, 3cy , 17yr914 W1276 W1503 W1477 W1163 W906 W11121314 (TC Lance)1516ZirloM5Zirc-4M5M5M554.6 GWd/MtU51.0 GWd/MtU50.6 GWd/MtU52.2 GWd/MtU50.6 GWd/MtU51.8 GWd/MtU4.2%, 3cy, 17yr4.55%, 3cy, 5 yr3.59%, 3cy, 30yr4.55%, 3cy, 6yr4.55%, 3cy, 5 yr4.55%, 3cy, 8 yr885 W1496 W696 W1281 W1482 W1120 W 17 1819(TCL)20 21 22 17 18 19 (TC L ance)20 21 22M5M5ZirloLow-Sn Zirc-4M5M553.3 GWd/MtU50.9 GWd/MtU53.1 GWd/MtU50 GWd/MtU51.0 GWd/MtU51.9 GWd/MtU4.55%, 3cy, 8yr4.55%, 3cy, 5 yr4.45%, 3cy, 10yr4.0%, 2cy, 22yr4.55%, 3cy, 5 yr4.55%, 3cy, 8 yr1165 W1492 W1037 W725 W1496 W1121 W2324 (TC Lance)25262728 (TC Lance)ZirloZirloM5M5M5Zirlo55.1 GWd/MtU52.9 GWd/MtU51.0 GWd/MtU51.3 GWd/MtU53.5 GWd/MtU53.0 GWd/MtU4.25%, 3cy, 11yr4.45%, 3cy, 10yr4.55%, 3cy, 5 yr4.55%, 3cy, 5 yr4.4%, 3cy, 8yrs4.45%, 3cy, 10yr1036 W1031 W1495 W1511 W1178 W1035 W293031 (TC Lance)32M5M5ZirloZirlo51.2 GWd/MtU53.0 GWd/MtU54.9 GWd/MtU52.3 GWd/MtU4.40%, 3c y, 8 yr4.55%, 3c y, 8 yr4.25%, 3c y, 11 yr4.25%, 3c y, 13 y r,y,y,y,y,y,y,y,y1073 W1155 W1031 W918 W 5High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch Project Milestone Schedule6/15:Completion of sister rod retrieval7/31/15:Dominion submits LAR to NRC1Q16:Sister rods shipped to laboratory1/31/17:TargetforNRCreviewcompletion 1/31/17:Target for NRC review completion6/30/17:Dry run and functional tests complete7/31/17:Caskloadingcomplete

-begin thermal7/31/17: Cask loading complete -begin thermal soak period8/21/17:Cask em placed at ISFSI p ad pp 6High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearchProjectNosignificantchangestothecaskbodyorbasket Research Project TN-32 HBU Cask SpecificsNo significant changes to the cask body or basket are anticipatedTN-32B-81(originalnameplate)caskfabricatedand TN-32B-81 (original nameplate) cask fabricated and certificate of conformance issued by Areva TNNameplate will be modifiedCask exterior will be recoatedNochangeswillbemadetothepressuremonitoring No changes will be made to the pressure monitoring system, pressure switches, or alarm hookupsThe pressure monitoring system will monitor additional thermocouple lance penetrations 7High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearchProjectPhysical changes to the TN-32 HBU Cask include:

Research Project TN-32 HBU Cask SpecificsSeven thermocouple ports will be added to the lidConfinement maintained by dual metallic seals very similar to the port cover dual metallic seals described in the original TN-32 FSARAdditional helium lines will be used to connect the thermocouple port seals to the Overpressure System (OP) for seal integrity monitoringTop neutron shield elevated approximately one inch to provide space for thermocouple wiring and OP system tubingAnadditionalhandwaywillbeaddedtotheProtectiveAn additional hand-way will be added to the Protective Cover (environmental cover) to permit access to the vent port for subsequent gas sampling at the padUpgraded lid closure bolt connections 8High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearchProjectConfinementboundary Research Project TN-32 HBU Cask SpecificsConfinement boundary Maintained from original TN-32 design, with the following additions:Thermocouple sleeve inserts, head, and lanceThermocouple is based on the design used in B&W reactorsDual seal configuration with same Tech Spec monitoring equipment -connected at the ISFSI pad 9High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch ProjectTC Lance Confinement Boundary 10High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch Project TN-32 HBU Cask SpecificsAdditional materials included in the designThermocou p le/fuel assembl y interface g uidespygNeutron absorber rods for future transport considerationsSimilar to absorber assemblies used during operation 11High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearchProject Research Project TN-32 HBU Cask SpecificsTN-32B HBU cask fabricated to CoC 72-1021 requirementsNot initially licensed for high burnup fuelSeek to amend North Anna's site specific ISFSI license SNM-2507 for TN-32 storage casks to add the HBU Cask 12High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearchProject Research Project License ChangesRequested changes to the license will include:Allowable fuel parameters

• Initial Enrichment4.60 wt. % (Areva Advanced Mark BW)3.64 wt. % (Westinghouse Standard)450wt%(WestinghouseVantage5H) 4.50 wt. % (Westinghouse Vantage 5H)*Average Burnup 60 GWD/MTU

• Minimum Cooling Time5 years

• DecayHeat3696kW*Decay Heat 36.96 kW*Fuel Assembly DesignsAreva Advanced Mark BWWestinghouse StandardWestinghouseVantage5HWestinghouse Vantage 5H 13High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearchProjectRequestedchangestothelicensewillinclude:

Research Project License ChangesRequested changes to the license will include:Allowable fuel parameters

• Fuel Assembly InsertsUnirradiated Poison Rod Assemblies (six total)

• Fuel Assembly Weight, Including PRAs 1551 pounds

• Fuel Assembly InitialUranium Content 469.0 kgU/assembly 14High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearchProjectRequestedchangestothelicensewillinclude:

Research Project License Changes Requested changes to the license will include:Changes to LCOsAsurveillancewillbeaddedtoLCO312forSSSCsealintegritytoA surveillance will be added to LCO 3.1.2 for SSSC seal integrity to allow for cavity testing during Loading Operations (extended period of time before final closure -"thermal soak period")FrequencyperiodforLCO3.1.3movedtoTable3

-1toallowforcavity Frequency period for LCO 3.1.3 moved to Table 3 1 to allow for cavity testing during Loading Operations No change to the limits in Table 3-1 for existing TN-32 designSurfacedoseratesforthetopofthecaskwillincreasebutnochangeSurface dose rates for the top of the cask will increase , but no change to the side surface dose rate is necessaryAdditional minor changes needed to account for the use of the TN-32 HBUCask HBU Cask 15High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch ProjectADesignandLicensingBasisDocument(DLBD)

Design Basis A Design and Licensing Basis Document (DLBD) will be submitted with the License Amendment Request (LAR) (proprietary submittal)The DLBD will provide the analytical bases and conclusions for departures from the existing approvedanalysesintheTN32FSAR approved analyses in the TN-32 FSARFor example:Criticality safety analysis, higher enrichmentThermal safety analysis, higher heat loadingShielding analysis, higher source term 16High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch ProjectMethodIn Situ Cavity Gas SamplingInstall scaffold building over cask, remove vent port cover, fill gas sample bottles, analyze contentsV ent port cover will be reseated usin g same seal desi g n as the ori g inal pggg(i.e., bolts, lubricant, torque technique, and o-ringwill be same design)Planned frequencyOncebefore2020(target1yearafterloading)

Once before 2020 (target 1 year after loading)Once ~ 3 years after first sample Once prior to transportBasisAligns with station resource requirements and ALARA principlesSupports industry license renewal timing needs 17High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSIResearch ProjectISitCitGSliLiiSNM2507licensedoesnotdescribeinsitucavity I n Sit u C av it y G as S amp li ng -Li cens i ngSNM-2507 license does not describe in situ cavity gas samplingConfinement inte g rit y assured b y Tech S pec leak rate gyypverification and continuous seal monitoring via overpressure systemHowevercannotverifyoriginalTechSpecleakrate However , cannot verify original Tech Spec leak rate criterion is met after vent port cover is replacedInsitucavitygassamplingwillbeaddressedina In situ cavity gas sampling will be addressed in a separate licensing action following LAR submittal 18High Burnup Dry Storage Confirmatory Data Project -May 13, 2015 North Anna ISFSIResearchProject Research Project Questions?

19High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSI SNM-2507 License Renewal Rich Ridder May 13, 2015 North Anna ISFSI License Renewal PlanSite-Specific License SNM-2507 expires June 2018LiRl(LR)litihdldfLi cense R enewa l (LR) app li ca ti on sc h e d u l e d f or submittal April 2016IncludestheTN

-32caskspresentlyonPad1 Includes the TN 32 casks presently on Pad 1NUREG-1927 Rev. 0, use expanded guidance (draft) from Rev. 1Aging Management guidance from NEI 14-03TLAAs40yearrenewalperiod 40 year renewal period2016 LR application will not contain information abouttheHBUCask about the HBU Cask 21High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSILicenseRenewalApplicationandLARTiming License Renewal Application and LAR TimingHBUCkAtiitiLAR review com pleteHBU Cask placed at North Anna ISFSI Pad1Submit License Amendment Request fk HBU C as k A c ti v iti es pJuly2015April 2016June 2018January2017Spring 2017Pad 1August2017 f or HBU Cas kSubmit SNM-2507 License RenewalSubmit supplementto LR application with HBU Scheduled completion of LR July 2015January 2017August 2017applicationCask informationapplication reviewLicense Renewal Activities 22High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSILicense Renewal Plan -SummaryLicenseAmendmentRequestfortheHBUCasktobeLicense Amendment Request for the HBU Cask to be submitted July 2015, prior to the ISFSI License Renewal

application in 2016NddttHBUCkldihdlN ee d e d t o suppor t HBU C as k l oa di ng sc h e d u l eSubmittal letter for the License Amendment Request will explain the plan for the License Renewal applicationInclusion of HBU Cask information in a Supplement to the LR application once LAR review is completedHBU Cask is planned to be loaded and placed at the ISFSI during the License Renewal application review period 23High Burnup Dry Storage Research Project -May 13, 2015 North Anna ISFSI License Renewal Questions?

24High Burnup Dry Storage Research Project -May 13, 2015