Electron avalanching in liquid argon is being studied as a function of voltage, pressure, radiation intensity, and the concentrations of certain additives, especially xenon. The avalanches produced in an intense electric field at the tip of a tungsten needle are initiated by ionization from a movable americium (Am) gamma-ray source. Photons from xenon excimers are detected as photomultiplier si...

Decontamination performance of some noticeable fission products from TRU elements by the TRUEX process was calculated with a multistage extraction simulation code. The batch extraction data of molybdenum, palladium, antimony, and cerium, which have been obtained in our related TRUEX studies, were provided for the calculation. For uranium, plutonium, and americium, literature data were used. A m...

Determining the content of transuranium elements, Americium (Am), Plutonium (Pu), Neptunium (Np), and Curium (Cm) in the nuclear fuel cycle and in nuclear radioactive waste is important for both economic and human toxicity reasons. The major concern is processing the sample rapidly and quantitating these transuranium alpha emitters in the presence of 10 fold excess of beta emitting contaminants...

Electron probe microanalysis (EPMA) is used to quantify with a high accuracy the amount of different elements present on a sample of unknown composition. In the nuclear field, EPMA is largely used to quantify the amount of actinides present in fresh and irradiated fuels. EPMA is also used to manage waste disposal, to analyze sample from severe accidents and to assess the design of next-generati...

Neptunium-237 is a long-live emitters formed after americium-241 decay which is mainly produced after irradiation of nuclear fuels. NpO2 can be produced after irradiated fuel reprocessing. Without any experimental results on this chemical form after inhalation, the ICRP considered NpO2 as a type M compound. Preliminary results suggested that after inhalation exposure of rats to NpO2 the biologi...