© 2018 Electric Power Research Institute, Inc. All rights reserved.

Keith WaldropPrincipal Technical Leader

Electric Power Research Institute

Dave TomlinsonNuclear Spent Fuel Engineer

Dominion Energy

INMM Spent Fuel Management SeminarJanuary 24, 2018

High Burnup Data Project

2© 2018 Electric Power Research Institute, Inc. All rights reserved.

High Burnup Data Project – Why We Need Data

Data available are from lab testing

Limited data on HBU fuel in dry storage– Data needed to support HBU fuel Aging Management Plans for

several renewed storage licenses– Transport licenses for HBU fuel are very limited and restricted

Need to collect data on HBU fuel– Real fuel, in a real cask, under real conditions

3© 2018 Electric Power Research Institute, Inc. All rights reserved.

High Burnup Data Project – Big Picture

Collect data on High Burnup fuel in dry storage conditions– Select fuel to provide best scientific data (4 cladding

types)– Determine initial condition of fuel– Instrument cask to acquire data (temperature and gas

composition)– Load cask using standard industry loading processes– Collect data– Store ~ 10 years– Determine post-storage condition of fuel– Reclose and continue storage and measurements

4© 2018 Electric Power Research Institute, Inc. All rights reserved.

High Burnup Data Project

DOE/EPRI contract– 80/20 DOE/EPRI cost share– EPRI led teamDominion, AREVA (AFS, TN, NP, Fuels), Westinghouse, NAC

– Design, fabricate, license and load cask– Take measurements and report results– Extract and ship sister rods

DOE/National Lab activities– Nondestructive and destructive sister rod testing– Detailed thermal modeling– Provide Fuel Examination Facility

NRC review license requests (storage and transport) Industry Review Team

5© 2018 Electric Power Research Institute, Inc. All rights reserved.

Loading Pattern1 2 (TC Lance) 3 4

6T0 3K7 3T6 6F2Zirlo, 54.2 GWd M5, 53.4 GWd Zirlo, 54.3 GWd Zirlo, 51.9 GWd4.25%, 3cy, 11yr 4.55%, 3cy, 8yr 4.25%, 3cy, 11yr 4.25%, 3cy, 13yr

1013/818W 1167/837W 1015/820W 909/756W DRAIN PORT

5 6 (TC Lance) 7 8 9 10

3F6 30A 22B 20B 5K6 5D5Zirlo, 52.1 GWd M5, 52.0 GWd M5, 51.2 GWd M5, 50.5 GWd M5, 53.3 GWd Zirlo, 55.5 GWd4.25%, 3cy, 13yr 4.55%, 3cy, 6yr 4.55%, 3cy, 5 yr 4.55%, 3cy, 5 yr 4.55%, 3cy, 8yr 4.2%, 3cy, 17yr

914/761W 1276/832W 1503/841W 1477/827W 1163/834W 906/796W11 Vent P o rt 12 13 14 (TC Lance) 15 16

5D9 28B F40 57A 30B 3K4Zirlo, 54.6 GWd M5, 51.0 GWd Zirc-4, 50.6 GWd M5, 52.2 GWd M5, 50.6 GWd M5, 51.8 GWd4.2%, 3cy, 17yr 4.55%, 3cy, 5 yr 3.59%, 3cy, 30yr 4.55%, 3cy, 6yr 4.55%, 3cy, 5 yr 4.55%, 3cy, 8 yr

885/778W 1496/837W 699/?W 1281/834W 1482/830W 1120/803W

17 18 19 (TC Lance) 20 21 22

5K7 50B 3U9 0A4* 15B 6K4M5, 53.3 GWd M5, 50.9 GWd Zirlo, 53.1 GWd Low-Sn Zy-4, 50 GWd M5, 51.0 GWd M5, 51.9 GWd4.55%, 3cy, 8yr 4.55%, 3cy, 5 yr 4.45%, 3cy, 10yr 4.0%, 2cy, 22yr 4.55%, 3cy, 5 yr 4.55%, 3cy, 8 yr

1165/835W 1492/835W 1037/805W 725/664W 1496/837W 1121/804W

23 24 (TC Lance) 25 26 27 28 (TC Lance)

3T2 3U4 56B 54B 6V0 3U6Zirlo, 55.1 GWd Zirlo, 52.9 GWd M5, 51.0 GWd M5, 51.3 GWd M5, 53.5 GWd Zirlo, 53.0 GWd4.25%, 3cy, 11yr 4.45%, 3cy, 10yr 4.55%, 3cy, 5 yr 4.55%, 3cy, 5 yr 4.4%, 3cy, 8yrs 4.45%, 3cy, 10yr

1036/837W 1031/801W 1495/837W 1511/846W 1178/843W 1035/803W

29 30 31 (TC Lance) 32

4V4 5K1 5T9 4F1 High Priority AssysM5, 51.2 GWd M5, 53.0 GWd Zirlo, 54.9 GWd Zirlo, 52.3 GWd4.40%, 3cy, 8yr 4.55%, 3cy, 8yr 4.25%, 3cy, 11yr 4.25%, 3cy, 13yr

1073/787W 1155/828W 1031/832W 918/764W

Burnup Clad Type Qty Range

Zr-4 1 50.6low tin Zr-4 1 50

Zirlo 1251.9 -55.5

M5 1850.5 -53.5

KEYLocation (Thermocouple)

Assy ID (high priority)Cladding , BU

Enr, #cycles, Yrs cooledDecay Heat (loading), (transport)

6© 2018 Electric Power Research Institute, Inc. All rights reserved.

Thermocouples

63 Thermocouples - 7 radial, 9 axial Installed into guide tube location after loading Jacking plate and double metallic o-ring for confinement Also external surface temperature measurements with IR gun

Thermocouple axial locations External surface measurement locations Thermocouple closure assembly

7© 2018 Electric Power Research Institute, Inc. All rights reserved.

Sister Rods

ORNL completed non-destructive testingPreparing for destructive testing including heat treatment of

rods

Results published ORNL/SPR-2017/484Modular heat treatment furnace

Gamma scan of rods from Assy30A

Image of rod P17 Assy F35

8© 2018 Electric Power Research Institute, Inc. All rights reserved.

2017 Progress

License amendment received Sep 2017 Fabrication completed Oct 2017 Cask received at North Anna Oct 2017

Re-machining seal surfaceLeak testingApplying metal spray

Cask arriving at North Anna

Loading cask into shipping frame

9© 2018 Electric Power Research Institute, Inc. All rights reserved.

Cask Loading

Loading began Nov 14– Drying ~ 7 hrs

Loading completed Nov 16– Thermal soak ~ 2 weeks

Cask moved to ISFSI Nov 30

Last assembly being loaded Cask on padCask lowering into decon bay

10© 2018 Electric Power Research Institute, Inc. All rights reserved.

Initial Results

Temperatures –– Not reporting yet due to blind round robin thermal analysis– Thermocouples working and recording temperatures– Observed thermal transient from draining through drying, backfill and reaching

equilibrium

Gas samples– 3 samples taken (After He backfill, then about 1 week apart)– No Kr - All radionuclides essentially zero (below detection limit) No fuel failure

– No hydrogen or oxygen (below detection limit)– Moisture content still evaluating Convert results of sample bomb (ppm) to cask conditions (grams) Need to validate North Anna analysis equipment Just received results from Sandia

11© 2018 Electric Power Research Institute, Inc. All rights reserved.

High Burnup Data Project – Future Activities2018 - ~2027:Begin reporting resultsExtend DOE contractLicensing Action for gas sampling at pad Continue taking periodic temperature measurementsContinue taking periodic gas samples at pad if approvedApply for transportation Certificate of Compliance (CoC)

Enclosure for potential gas sampling on the padDownloading data from data logger

12© 2018 Electric Power Research Institute, Inc. All rights reserved.

High Burnup Data Project Schedule (con’t)

~2027Prepare cask for transportationShip cask to a Fuel Examination Facility (TBD)Open cask and visually examine the fuel

– Extract high burnup rods for subsequent examination– Conduct nondestructive and destructive examinations at

the national lab(s)Same exams as “t=0” exams on sister rodsCompare end-of-storage and “t=0” fuel properties

Reclose cask and continue storage; re-open again later

13© 2018 Electric Power Research Institute, Inc. All rights reserved.

Together…Shaping the Future of Electricity