Age determination analysis of a single uranium particle for safeguards

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…Isotopic ratio measurement was also effectively applied to age determination of single U particles for safeguard purposes. 188 Following chemical separation, 230 Th/ 234 U was measured using a single collector ICP-MS instrument along with a 233 U reference material containing 229 Th progeny. The purication ages of two certied materials (U-850 and U-100) were determined, with good agreement with the reference age of 61 years.…”

Production of mixed element actinide reference particulates to support nuclear safeguards using THESEUS, an aerosol-based particulate synthetic methodology

“…Prior, SRNL has explored various particulate synthesis parameters, such as calcination temperature, feedstock concentration, ratios of feedstock solutions, and aerosol generation, which improved production. 5–7,16,17…”

“…In addition, such materials are imperative to advance microanalytical capabilities, such as particle-based chronometry. [16][17][18][19] Recent R&D efforts have focused on transitioning uranium oxide production technologies to the synthesis of mixed actinide-bearing particulates with targeted lanthanide compositions, [20][21][22] and Th/U-oxide particles. 23 Savannah River National Laboratory (SRNL) has developed a mixed actinide oxide phase particle production platform to meet end user physical and analytical requirements.…”

“…Prior, SRNL has explored various particulate synthesis parameters, such as calcination temperature, feedstock concentration, ratios of feedstock solutions, and aerosol generation, which improved production. [5][6][7]16,17 The engineered aerosol-based production platform developed is called THESEUS, which stands for THermally Evaporated Spray for Engineered Uniform particulateS. This methodology is used to produce fit-for-purpose mixed-actinide particulate species, suitable for QC reference materials.…”