Brad Merrill
Fusion Safety Program Group Leader

Group Leader for the Fusion Safety Program.  Technical lead for computer code development for fusion safety.  Work in licensing, fusion safety code development, and modifications for computer codes for the ITER International Project.  Experience in modeling multi-phase fluid flow, multi‐phase and radiant heat transfer, aerosol transport, electromagnetics, and superconducting magnets. The fusion safety computer codes he has developed address tritium transport in materials, material oxidation, multi‐phase fluid flow, multi‐phase heat transfer, aerosol resuspension and transport, electrodynamics, radiant energy transport, and magnet arcing.  More than 40 years experience in thermal science, safety analysis, and safety code development.   Bachelor’s in nuclear engineering from Oregon State University.

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Lee Cadwallader
Safety and Risk Researcher, Deputy Group Leader

Safety and risk assessment of high technology energy systems.  Specializes in component failure data collection and analysis, operating experience data, accident-initiating event data, and system failure event information support for public and worker safety.Performs research in reliability, availability, maintainability, and inspectability (RAMI). Coordinates a task in failure rate data for the IEA implementing agreement on environmental, safety and economic aspects of fusion power.  Master’s degrees in nuclear engineering (University of Missouri-Rolla), mechanical engineering (University of Idaho), and industrial safety technology (University of Idaho).  Over thirty years of experience at INL.

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Masashi Shimada
Experiments Lead

Leading Principal Investigator at the Safety and Tritium Applied Research (STAR) facility at INL in support of the DOE Fusion Energy Science tritium and safety research.  Principal Investigator of the Tritium Plasma Experiment (TPE), Tritium Lead Lithium Eutectic (TLLE) experiment, and the Tritium Heat eXchanger experiment (THX).   Conducts experiments and numerical modeling of hydrogen isotope permeation, especially tritium, and transport in materials for fusion applications as well as for the DOE Nuclear Energy (NE) Very High Temperature Reactor (VHTR) fission plant design.  Serves as the Task 1 (In-Vessel Tritium Source Term) coordinator for the International Energy Agency (IEA) Implementing Agreement on the Environmental, Safety and Economic Aspects of Fusion Power (ESE-FP).  PhD in Engineering Physics from the University of California-San Diego.  Over seven years of experience at INL.
 

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Paul Humrickhouse
Research Scientist

Research Scientist in the Fusion Safety Program.  Research areas include fusion systems analysis, thermal hydraulics and heat transfer, severe accident analysis, nuclear aerosols, dust explosions, granular materials, tritium permeation and transport, and beryllium handling and technology.  Principal Investigator of the Experimental Chamber for Evaluation of Exploding Dust (ExCEED).  INL representative in the IAEA Coordinated Research Project (CRP) on Dust in Fusion Devices and the Fusion Energy Systems Studies (FESS) group.  Coordinator for Task 3 (Activation Products Source Terms) of the IEA Implementing Agreement on the Environmental, Safety, and Economic Aspects of Fusion Power (IEA-ESEFP).  PhD in Nuclear Engineering and Engineering Physics from the University of Wisconsin-Madison.  Over five years of experience at INL.
 

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Byron Denny
STAR Laboratory Manager

Manage, direct and perform activities enabling safe, effective, and efficient operation of the Safety and Tritium Applied Research (STAR) Facility.  Perform bench-scale experiments with tritium and other hazardous materials to support research programs including fusion energy science, hydrogen energy technologies, and advanced nuclear technologies.  Responsibilities include handling, transporting, accountancy and waste disposition of   tritium and tritium materials.   Work with pressurized systems, vacuum systems, gloveboxes, ventilated hoods, instrument and control technology, and hazardous materials handling.  Work with support organizations to lead facility operations and guide experiments to ensure a high level of quality and safety.  M.S. in Technology Management with a Nuclear Criticality Safety Certificate from the University of Idaho.  Completed the DOE’s Nuclear Criticality Safety Program’s two week hands‐on course at LANL and SNL. Over 9 years of experience at INL.
 

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Robert Pawelko
STAR Laboratory Space Coordinator

Scientist in the Fusion Safety Program. Investigates tritium permeation in high temperature alloys. Responsible for tritium accountability measurements and documentation and assists in general laboratory activities at the STAR lab.  Knowledgeable in tritium accountancy and tritium measurement systems, quadrupole mass spectrometry, BET surface area measurements, elemental assay by prompt gamma neutron activation analysis, and radiation measurements and spectrometry. Supports tasks in hydrogen isotope transport in fusion relevant material studies, beryllium dust explosion studies, beryllium-steam reactivity studies, tritium recovery from irradiated beryllium research, waste characterization, getter applications, and radiation monitoring systems. B.S. in physics from Northeastern Illinois University. Over 24 years of experience at INL.
 

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Chase Taylor
Fusion Safety Experiment Researcher

Experimental researcher with expertise in hydrogen retention, plasma material interactions, fusion technology, surface chemistry analysis techniques, vacuum systems.  Research interests include tritium retention in neutron damaged refractory materials, techniques for measuring defect concentration, and tritium permeation. Operates the neutron irradiated material ion implantation experiment (NIMIIX) focusing on deuterium ion implantation. Conducts thermal desorption spectroscopy and positron annihilation spectroscopy. PhD in nuclear engineering from Purdue University. Over two years of experience at INL.
 

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Lisa Moore-McAteer
Laboratory Technician

Lead electro-mechanical technician supporting all tritium, deuterium, and beryllium experiments at the Fusion Safety Program STAR laboratory.  Tasks include experiment apparatus design, parts procurement, assembly, commissioning, operation, and disassembly.  Work with instrumentation, inert atmosphere gloveboxes, ventilated enclosures, fume hoods, low voltage electricity, vacuum equipment, data acquisition systems.  Data collection and experiment preparation, periodic inspections.  Degree in Electronic Systems Technology from the Idaho State University School of Applied Technology.  Over 14 years of experience at INL.
 

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