Publications

Sep, 2026

Journal

Real-Time Quantification of Hydrogen and Deuterium Using Laser-Induced Breakdown Spectroscopy (LIBS) in the Off-Gas of an Engineering-Scale Pumped Molten Salt Loop

Laser-induced breakdown spectroscopy (LIBS) is being considered for elemental analysis of radionuclides transported into the off-gas system of molten salt reactors. A mobile LIBS system was calibrated for gas-phase measurements of hydrogen (i.e., protium, denoted here as H) and deuterium (D) in argon (Ar). The system was then used to quantify the concentrations of H and D…

Jul, 2026

ORNL Report

Fuel–Coolant Interaction Experiment for HFIR Pressure Vessel Replacement: Design and Demonstration

Jul, 2026

Conference Paper

Characteristics of Molten Salt Aerosol Droplets Produced by Bubble Bursts

Jun, 2026

Conference Paper

Development of Ultrasonic Imaging for Nonintrusive Flow Measurements

Jun, 2026

ORNL Report

Preliminary Design of a Tritiated Yttrium Radioisotope Heat Source

May, 2026

Journal

Design of a Molten Salt Flow Cell for Combined Absorbance and Laser-Induced Breakdown Spectroscopy for Online Measurements

A novel flow cell allowing for multiple optical spectroscopy measurements on flowing molten salts was designed, and demonstrative calibrations of impurities in aqueous samples were performed. Online compositional measurements of molten salts are of high interest to monitor the state of relevant solar and nuclear systems. The Spectroscopic Configuration for Optical Real-Tim…

Mar, 2026

Conference Paper

Correlation Models of Radioactive Particle Deposition in Ventilation Ducts in Nonreactor Nuclear Facilities

Mar, 2026

Conference Paper

Optical and Neutron Imaging Measurements of Gas Bubble Rise Velocity in Molten Salt

Dec, 2025

ORNL Report

Aerosol and Gas Transport in Ventilation Ducts in Nonreactor Nuclear Facilities — Enhanced Numerical Models and On-Site Measurements for Model Validation

This document summarizes outcomes and findings from a project sponsored by the Nuclear Safety Research and Development Program, which is managed by the Office of Nuclear Safety, within the Office of Environment, Health, Safety and Security.

Nov, 2025

ORNL Report

Engineering Design Framework for Tritiated Radioisotope Heat Sources: Requirements and Considerations

Sep, 2025

ORNL Report

Analysis of Off-Gas Streams from Small- and Large-Scale Sparging Salt Vessels using Laser-Induced Breakdown Spectroscopy

Sep, 2025

Journal

Reassessment of Caustic Scrubbing for Radioiodine Capture during UNF Processing

The effective removal of iodine-129 from gaseous emissions during used nuclear fuel processing is critical for minimizing environmental contamination and ensuring environmental regulatory compliance. Recent research has focused on optimizing process air, scrubber conditions, and integrating complementary techniques, such as solid sorbents as a polishing step, to improve io…