A5107966049- Radioactive element chemistry and processing
- Lanthanide and Transition Metal Complexes
- Extraction and Separation Processes
- Nuclear materials and radiation effects
- Petroleum Processing and Analysis
- Chemical Synthesis and Characterization
- Analytical Chemistry and Sensors
- Thermal and Kinetic Analysis
- Corrosion Behavior and Inhibition
- Hydrogen embrittlement and corrosion behaviors in metals
- Luminescence Properties of Advanced Materials
- Organometallic Complex Synthesis and Catalysis
- Molten salt chemistry and electrochemical processes
- Field-Flow Fractionation Techniques
Idaho National Laboratory
2024-2025
The direct dissolution of voloxidized used nuclear fuel (UNF) into an organic solution-comprised diluent and specialized extractants-poses a promising alternative to the traditional liquid-liquid solvent extraction approach reprocessing UNF. However, moving removes presence concentrated nitric acid aqueous phase, which has been shown significantly influence radiolytic longevity extractants in conventional flowsheets. Given limited knowledge radiation effects under conditions, here we present...
Diethylenetriaminepentaacetic acid (DTPA) is a frequently used chelator in the nuclear and medical industries, especially for complexation of trivalent actinides. However, structural data on these complexes solid-state have long remained elusive. Herein, detailed analysis presented crystal structures [C(NH2)3]4[Nd(DTPA)]2·nH2O [C(NH2)3]4[Am(DTPA)]2·nH2O, where [C(NH2)3]+ guanidinium, details subtle differences Lewis acidity between lanthanide/actinide pair similar ionic sizes. Contractions...
Complexes of N,N,N′,N′-tetramethyl diglycolamide (TMDGA), a hydrophilic (DGA) proposed as an aqueous phase holdback reagent, have been crystallized for the majority lanthanide series (excluding promethium), yttrium, and americium to deepen our structural understanding trivalent metal ion (M3+) DGA coordination compounds in presence nitrate counter-anions. The presented collection 16 complexes with accompanying single-crystal structures, taking formulas [M(TMDGA)3][M(NO3)6] (M = La, Ce, Pr,...
Molten salts are proposed as liquid fuels or coolants in a new fleet of molten salt nuclear reactors that would have operational and safety advantages over present reactor systems. Under those conditions, the will be exposed to high radiation levels, understanding chemical effects radiolysis on fuel coolant is essential reliable, efficient sustainable operation. Building this begins with identifying primary products (solvated electrons (e solv – ) Cl 2 •– characterizing their reactivities,...
Chromium (Cr) is a frequent constituent of the metal alloys proposed for molten salt nuclear reactor (MSR) applications, and typically least noble ion present. Consequently, chromium preferentially corroded into solutions. The redox poise cycling ions in can greatly influence its corrosivity towards structural alloys, ultimately impacting longevity MSR systems. Radiation-induced chemistry expected to play significant role determining oxidation state distribution during operations. In present...