A fast and sensitive method for the determination of uranium in the Thorex Process streams |
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Authors: | Suman Kumar Singh S K Misra S S Pandit K J Parikh S C Tripathi |
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Institution: | (1) Fuel Reprocessing Division, Bhabha Atomic Research Centre, Mumbai, 400085, India |
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Abstract: | This paper presents a simple, rapid and sensitive radiometric method for the determination of uranium in Thorex Process stream
containing large amount of thorium. This method involves the extraction of uranium into 0.05M tri-n-octyl phosphine oxide
(TOPO) in xylene at 2M HNO3. The extraction of thorium is prevented by masking them with suitable quantity of fluoride ions. The optimum experimental
parameters for extraction of 233U were evaluated and using the most suitable experimental conditions the extracted uranium is radiometrically determined by
α-counting in proportional counter with a prior knowledge of specific activity of uranium. Simultaneously in the same sample
uranium was determined by spectrophotometric method using 2-(5bromo-2 pyridylazo)-5-diethylaminophenol (Bromo-PADAP) as chromogenic
reagents. Simulated as well as actual samples of dissolver, conditioner and raffinate tank of Thorex stream have been analyzed
by both these methods. The method was tested for as low as 0.15 μg of uranium and the results of these analyses were found
to be satisfactory within the experimental limits. |
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