NPSI LDRD PROJECTS

Projects and their respective principal investigators are listed below.

Science Thrust 1: Legacy Waste

• An In-situ Investigation of Gamma-AlOOH Dissolution under High pH Conditions
• Edgar Buck  (Project completed in fiscal year 2017)

• Correlation of Colloidal Interactions and Macroscopic Rheology in Concentrated Electrolyte Solutions
• Jaehun Chun  (Project completed in fiscal year 2018)
• Outcomes

• Particle-Filter Surface Interactions and Dynamics in the Presence of Cross-Flow
• Richard Daniel  (Project completed in fiscal year 2018)
• Outcomes

• Fundamental Insights into Gamma-Radiation Effects at Complex Oxide-Water Interfaces from First Principles Simulations
• Sebastien Kerisit  (Project completed in fiscal year 2019)

• Controlled Mineral Growth for Improving Tc-99 and I-129 Retention in Cementitious Waste Forms
• Sarah Saslow

• Particle Size and Density Measurement
• Phillip Gauglitz

Science Thrust 2: Nuclear Security

• Modeling the Interfacial Effects, Partitioning, and Production Routes of Epsilon Particles in Uranium Oxide
• Richard Clark  (Project completed in fiscal year 2018)

• Ion Implantation and Characterization of Epsilon Metal Phase Formation in Ceria
• Ram Devanathan  (Project completed in fiscal year 2019)

• Interfacial Diffusion and CRUD Formation at the Liquid-Liquid Interface of Solvent Extraction Processes Research  (Project concluded in fiscal year 2018)
• Amanda Casella

• Development of Phase Field Modeling to Predict Morphologies of Plutonium Oxalate
• David Abrecht  (Project transitioned to another research activity in fiscal year 2018)

• Fundamental Understanding of Nucleation Processes to Assess Solution Stability and Phase Growth and Genesis
• Gregg Lumetta  (Project completed in fiscal year 2018)

• Monitoring Diffusion of Actinide Daughters and Granddaughters in Metals for Chronometer Applications
• Dallas Reilly  (Project completed in fiscal year 2018)

• Characterization of Carbonaceous Surface Deposits on Irradiated Iron Aluminide (FeAl3) Coatings
• Walter Luscher

Science Thrust 3: Analytical Capabilities

• Development of a Rad AFM Capability
• Greg Kimmel

• Determining Radiolytic Transient Intermediates and Interfacial Species and Their Roles in Aluminum Oxyhydroxide Reactivity
• Zheming Wang

• Characterization of Radiation Induced Materials Defects Across Scales
• Luke Sweet

• Damage Mechanisms and Defect Formation in Irradiated Model Systems
• Steven Spurgeon

• Dissolution of Spent Nuclear Fuel: An In-situ and Atomic Resolution TEM Study
• Edgar Buck