A5062255597- Nuclear Materials and Properties
- Radioactive element chemistry and processing
- Nuclear reactor physics and engineering
- Radioactive contamination and transfer
- Graphite, nuclear technology, radiation studies
- Nuclear and radioactivity studies
- Nuclear Physics and Applications
- Mercury impact and mitigation studies
- Selenium in Biological Systems
- Catalytic C–H Functionalization Methods
- Radical Photochemical Reactions
- Fusion materials and technologies
- Nuclear physics research studies
- Catalytic Cross-Coupling Reactions
- Laser-induced spectroscopy and plasma
- Ion-surface interactions and analysis
- Analytical chemistry methods development
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Detection and Scintillator Technologies
- Geochemistry and Elemental Analysis
- Iron oxide chemistry and applications
- Fluorine in Organic Chemistry
- Environmental remediation with nanomaterials
- Coal and Its By-products
Studsvik (Sweden)
2012-2020
Purdue University West Lafayette
2016
Centre National de la Recherche Scientifique
2016
University of Portsmouth
2016
Clemson University
2016
Universidad del Noreste
2016
North Carolina State University
2016
Université de Montpellier
2016
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016
CEA Marcoule
2016
Direct disposal of spent nuclear fuel (SNF) in deep geological formations is the preferred option for final storage waste many countries. In order to assess which extent radionuclides could be released environment, it great importance understand how they are chemically bound matrix. This particularly important long-lived such as (79)Se, (129)I, (14)C or (36)Cl, form poorly sorbing anionic species water and therefore migrate without significant retardation through argillaceous repository...
We present a study of selenate (SeO42-) on an iron surface in ground water solution by X-ray absorption near-edge spectroscopy. Spectral sharpening is obtained using the high energy resolution fluorescence detection technique that also efficiently suppresses strong signal from Fe highly dilute samples (Se concentration < 3 ppm). observe fully reduced Se polished surfaces while no changes are found for oxidized surface.
1,10-Phenanthroline reacts with aldehydes and ketones in the presence of samarium diiodide to produce 2-(1-hydroxyalkyl)-1,10-phenanthrolines. The hydroxyalkyl substituent can be functionalized numerous ways or removed permit further ligand variation. carbonyl coupling reaction also repeated provide 2,9-disubstituted phenanthrolines. Taken together, these operations ready access a large number phenanthroline derivatives serve as libraries for catalyst exploration.
The release of radionuclides from spent nuclear fuel upon contact with water is a central issue for the assessment safety geological disposal concepts. Several studies have been conducted aiming at understanding matrix dissolution as well rapid/instant separated UO2 matrix; there are however questions remaining regarding how higher burn-up affects amount fission products segregated to fuel-cladding gap and grain boundaries. In this study we performed aerated corrosion leaching experiments...
Canister designs for deep geological disposal of spent nuclear fuel typically involve large amounts iron. failure will likely corrosion the canister at depth several hundred meters underground, where conditions are anoxic. Spent and dissolution therefore proceed together with anoxic iron corrosion. The can suppress by creation strongly reducing from Fe(II) formation generation quantities hydrogen. In an attempt to separate effect hydrogen that products, two experiments were performed. both...
Abstract This paper reports on the development of a method for enhanced non-destructive assay (NDA) radioactive waste using novel technique neutron-gamma emission tomography (NGET). The relies detection correlated fast neutrons and gamma rays emitted in spontaneous or induced fission. It is based organic scintillators enables sensitive three-dimensional (3D) localization fission events. passive does not require moving components. In this work, we apply NGET to category which often referred...
This paper concerns a very high burnup UO2 spent nuclear fuel leaching experiment performed under hydrogen pressure conditions (5 MPa H2 initially) in simplified granitic groundwater. Following an initial release after start-up the results demonstrate that concentrations of redox sensitive elements such as Tc, U, Np and Pu stabilize at solubility limits their reduced oxide forms. The non-redox Cs also ceased within year. Together these observations indicate overpressure resulted reducing...
A previously published investigation of an irradiated fuel rod from the Ringhals 2 PWR, which was bowed to contact with adjacent rod, identified a significant but highly localised thinning clad wall and increased corrosion. Rod fretting deemed unlikely due adhering oxide covering surfaces. Local overheating in itself also insufficient account for accelerated Instead, enhanced concentration lithium conditions local boiling hypothesised explain Studsvik has developed hot cell coupled LA-ICP-MS...
Abstract For see ChemInform in Full Text.