An optical absorption method of detecting iodine-containing substances in liquid acid media formed during the reprocessing of spent nuclear fuel

We propose an absorption method for determining the concentrations of iodine-containing substances (I₂ and IO ₃ ^? ) in real time in liquid acid media formed when spent nuclear fuel is reprocessed at nuclear fuel cycle plants. The essence of the method is to measure simultaneously at two wavelengths the intensity of the radiation that passes through the solution being analyzed. The sensitivity of this method allows reliable and real-time control to be exercised over both the technological process of fuel reprocessing and the operations of purification systems.