Year
2011
Abstract
An evaluation of photometric techniques to determine uranium concentrations in a process stream is being conducted. A commercial system that monitors the optical absorption of multiple wavelengths has been selected for evaluation. The system consists of two sensors that monitor two wavelengths for uranium concentration and a third wavelength for correction in solution turbidity. From early measurements, it is known that variation in the levels of free nitric can cause errors when calculating the uranium concentration using a single wavelength. A multiple wavelength method is being evaluated to determine if the effects of nitric acid on the photometric determination of uranium concentration can be reduced. The preliminary results from the multiple wavelength technique are provided in this presentation.