Consortium for Verification Technology

Office of Defense Nuclear NonproliferationResearch and Development

CVT – Consortium for Verification Technology

Thrust II: Fundamental physical data acquisition and analysis

Alfred Hero (UM) – Thrust II Lead

John Fisher (MIT), Lawrence Carin (Duke)Sara Pozzi (UM), John Mattingly (NCSU)

November 30, 2017

Consortium for Verification Technology

Nuclearfuelcycle

Proliferation:ThreatandResponse1997.http://fas.org/irp/threat/prolif97/meafrica.html

Objective of IAEA safeguards: "...the timely detection of any diversion of significant quantities of nuclear material and to deter diversion by creating the risk of early detection." Leonard Weiss, Bulletin of Atomic Scientists, vol. 47, no. 4, 1991.

Potentialdiversions

Weapons Dismantlement

Program

Consortium for Verification Technology

Sensor planning(Fisher, ONR)

CVTThrustIIGoals• Goal1:Diversiondetectionandlocalization

– Objective:Todevelopsensitivestatisticallybasedmethodsformostquicklydetectingmaterialdiversionsfromnuclearfuelcycles

– Methods:activesensing,sparselearning,anomalydetection,informationfusion,nuclearfuelcyclesimulation

https://www.nrc.gov/images/materials/fuel-cycle-fac/fig030.gif

Link analysis (Hero, LANL)

Deep learning (Carin, ORNL)

𝐲" = ℎ 𝐱" + 𝝐", 𝐱" = 𝑓 𝐱"*+ + 𝝎"

Aerosol sensing (Hero, Fisher, LANL)

Consortium for Verification Technology

CVTThrustIIGoals• Goal2:Fundamentalphysicsmodelingofradiationdetectors

– Objective:TosimulateandexperimentallyvalidatenewmodelsforgammaandneutrondetectionforSNM

– Methods:source/detectorinteractionphysics,neutroncorrelation,nuclearunfolding,pulsediscrimination

SNMsourceposition

LiquidorganicandNaI(Tl)scintillatorarray

Bayesian unfolding (Pozzi, Hero)

Pulse discrimination (Pozzi, LANL)

Neutron-neutron coindicence ⦠(Pozzi)

Consortium for Verification Technology

CVTThrustIIGoals• Goal3:Signalandimageprocessingforradiationdetection

– Objective:todevelopsignalprocessingalgorithmsforemergingradiationdetectiontechnologies

– Methods:Bayesianmethods,frequencydomainmultiplexing,neutrontrackreconstruction,fissionimagereconstruction

Bayesian unmixing of radiaton portal monitor spectra (Pozzi, Hero)

7.6cmWGPusphere

252Cfpointsource

PassiveimagingofPu

Neutron coded aperture imager (NCAI) (Matteson – ORNL)

Single volume scatter camera using pillars of plastic scintillator(Matteson – SNL)

Consortium for Verification Technology

ThrustIIoralpresentations1. Ms.ElizabethHou:SequentialDetectionofUnusualDocuments(UM)2. Mr.MatthewMarcath:MeasuredandsimulatedCf-252spontaneous

fissionpromptneutron-photoncompetition(UM)3. Mr.ChristopherDean:AnEfficientNonlinearDispersionModelUsing

Continuous-Piecewise-Affine-basedTransformations(MIT)4. Prof.LarryCarin:DeepGenerativeModelsforAnomalyDetection(Duke)5. Ms SueZheng:RobustMonteCarloMethodsforSequentialPlanningand

DecisionMaking(MIT)

Consortium for Verification Technology

ThrustIIposterpresentations1. Mr.Haonan Zhu:Comparisonofunfoldingalgorithmsformonenergetic and

continuousfast-neutronenergyspectramethods(UM)2. Ms PatriciaSchuster:Measurementsofpromptfissionneutroncorrelations

inCf252(UM)3. CharlesSosa:ImprovementsinEnergyResolutionusingConicalStilbene(UM)4. Mr.ChristopherDean:MultimodalMultiscaleDataFusioninSpatial

ProcessesUsingtheHierarchicalBetaModel(MIT)5. Mr.Mudit Mishra:Frequencydomainmultiplexingofmultipleorganic

scintillatordetectors(NCSU)6. Dr.JonathanMueller:UsingTime-CorrelatedNeutronandGamma-Ray

MeasurementstoDistinguishPoint-likeSourcesFromSpatiallyDistributedSourcesWithoutImaging(NCSU)

7. Mr.KyleWeinfurther:Model-basedDesignEvaluationofaCompact,High-EfficiencyNeutronScatterCamera(NCSU)

8. Mr.RobertWeldon:CharacterizationoftheAnisotropicScintillationResponseofStilbenetoNeutrons(NCSU)