Synthesis and characterization of red-oil from tri <Emphasis Type="Italic">iso</Emphasis>-amyl phosphate/<Emphasis Type="Italic">n</Emphasis>-dodecane/nitric acid mixtures at elevated temperature |
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Authors: | Biplab Das Shekhar Kumar P Mondal U Kamachi Mudali R Natarajan |
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Institution: | (1) Kalpakkam Reprocessing Plant, Bhabha Atomic Research Centre Facilities, Kalpakkam, 603102, India;(2) Reprocessing Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India;(3) Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, 247667, India; |
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Abstract: | Red-oil is a mixture of nonspecific composition consisting of extractant, degradation products, nitrated solvent and unidentified
red-coloured nitro-organics. Red-oil formation is coupled with decomposition of extractant and diluent into gases of explosive
nature. If ignited or incinerated, these gases may cause rapid pressurization and endanger the integrity of containment. Such
an event occurred at Tomsk-7 facility in 1993. To ensure safe operation, red-oil formation has to be avoided in the fuel cycle
facilities by a careful combination of several independent measures like strict control over temperature, limiting organic
entrainment in the aqueous streams (which are to be concentrated by evaporation) and control over acidity of aqueous phases.
Since tri-iso amyl phosphate (TiAP) has much lower aqueous solubility as compared to TBP, it is visualized as alternate solvent for PUREX
process. In this work, TiAP red-oil was synthesized and characterized. |
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